JP2020200079A - Hinge cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge cap having a configuration suitable for mass production when an elastic plate which gives an opening force / closing force to a cap body to an upper lid is separated from a side wall at the time of injection molding. SOLUTION: The hinge cap of the present invention has a cap body to be attached to a container body, an upper lid, a pair of hinges, an elastic plate extending from the upper lid between the pair of hinges, and a side wall of the tip of the elastic plate between the pair of hinges. The elastic plate accommodating portion and the elastic plate accommodating portion accommodating in a state of being overlapped with each other are provided with a blocking portion for preventing the tip portion of the elastic plate from being detached from the elastic plate accommodating portion. The tip of the elastic plate is fixed to the side wall in a state of being overlapped with each other, and is a fixed piece part separated from the side wall at the time of injection molding. The accommodating portion for the elastic plate includes a guide portion for guiding the fixed piece portion in a radial direction in cooperation with the side wall and into which the fixed piece portion is inserted. The insertion direction of the fixed piece is from the side opposite to the container body toward the container body, or in the opposite direction. [Selection diagram] Fig. 1

Description

The present invention relates to a hinge cap made of synthetic resin. More specifically, a cap body that can be attached to the container body and the contents can be discharged, an upper lid that covers the cap body, a hinge that joins the upper lid to the cap body in an openable and closable manner, and an opening force and a closing force to the cap body. The present invention relates to a hinge cap provided with an elastic plate that imparts the upper lid.

As an example of the above-mentioned type of conventional hinge cap, there is one that can hold the upper lid in a wide open state by utilizing the restoring force of the elastic plate with respect to the cap body (see Patent Document 1).

In the hinge cap disclosed in Patent Document 1, the elastic plate extends from the upper lid toward the side wall, and in this order from the upper lid toward the side wall, a first bendable portion, a leaf spring portion, and a bendable first bendable portion, a leaf spring portion, and a bendable first portion. It is provided with a fixed portion fixed in a state of being overlapped with respect to the bent portion and the side wall of 2.

The figures and texts of Patent Document 1 clearly indicate that the fixed portion extends so as to be erected on the second bent portion and the side wall during injection molding. More specifically, the fixing portion includes an overlapping portion that extends from the second bent portion and overlaps the side wall, and a third bent portion that extends from the side wall to the overlapped portion.

Further, although not explicitly shown in the figure of Patent Document 1, it is stated in the text that it does not matter whether or not the fixed portion reaches the side wall at the time of injection molding.

Japanese Patent No. 6393819

If the fixed portion does not reach the side wall during injection molding, it is not specified how to fix it to the side wall. The word "fix" does not specify a specific configuration to be fixed, and includes various configurations. However, if it is not easy to mold and assemble after molding, it is not suitable for mass production.

The present invention has been created in consideration of the above circumstances, and an object thereof is suitable for mass production of a hinge cap provided with an elastic plate, wherein the elastic plate is separated from the side wall at the time of injection molding. It is to make a structure.

The hinge cap of the present invention is an integrally molded product made of synthetic resin. Further, the hinge cap of the present invention includes a tubular side wall to be attached to the container body, a closing plate for closing one open end of the side wall, and a cap body including a closing plate in which a discharge hole for contents is formed. The upper lid that covers the closing plate, the cap body and the upper lid are joined openly and closably, and a pair of hinges that are arranged at intervals in the circumferential direction of the cap body and the upper lid, and between the pair of hinges with respect to the cap body. An elastic plate that applies an opening force and a closing force to the upper lid and whose surface is a curved surface along the surface of the upper lid in the closed state, and the tip of the elastic plate overlapped with the side wall between a pair of hinges. It is provided with an elastic plate accommodating portion for accommodating in a state and a blocking portion for preventing the tip of the elastic plate from detaching from the elastic plate accommodating portion.
The elastic plate extends from the upper lid toward the side wall of the cap body. Further, the elastic plate is fixed in order from the upper lid to the side wall in a state of being overlapped with the first bendable portion, the leaf spring portion, the second bendable portion that can be bent, and the side wall, and at the time of injection molding. Provided a fixed piece portion separated from the side wall.
The upper lid is provided with a housing hole at its edge for accommodating the leaf spring portion in the closed state.
The accommodating portion for the elastic plate is a guide portion that guides the fixed piece portion in cooperation with the side wall so as to sandwich the fixed piece portion from the radial direction in the side wall, and includes a guide portion into which the fixed piece portion is inserted. The insertion direction of the fixed piece is a direction from the side opposite to the container body toward the container body, or a direction from the container body side toward the side opposite to the container body.

Further, when the upper lid of the hinge cap is closed, a force is applied to the fixed piece portion toward the side opposite to the container body so as to separate from the elastic plate accommodating portion. When the insertion direction of the fixed piece is from the side opposite to the container body toward the container body, the internal space formed between the elastic plate accommodating part and the side wall opens toward the container body side. This opening direction coincides with the direction in which the force applied to the fixed piece is about to separate. As for how to use the hinge cap, the time when the upper lid is closed is longer than the time when it is open. Therefore, in the case of this opening direction, the fixed piece portion is more likely to be separated from the elastic plate accommodating portion as compared with the case where the opening direction is opposite, which is not suitable for mass production. Therefore, it is desirable to make the hinge cap a configuration suitable for mass production as follows.
That is, the insertion direction of the fixed piece portion is from the container body side to the opposite side to the container body.

Further, although it does not matter whether the outer peripheral surface of the side wall is recessed or projected between the pair of hinges, the radial dimension of the hinge cap is made as short as possible, and the fixing piece portion is easily inserted into the accommodating portion for the elastic plate. It is desirable to do the following to facilitate mass production. Incidentally, since the side wall, the fixed piece, and the outer guide piece overlap in order in the radial direction between the pair of hinges, these thicknesses affect the radial dimensions of the hinge cap.
That is, the side wall is provided with an outer peripheral recess in which a pair of hinges on the outer peripheral surface are recessed inward in the radial direction and the main body of the fixed piece is overlapped. Then, the outer peripheral recess extends from between the pair of hinges toward the container body with respect to the pair of hinges.

In addition, it does not matter what kind of structure the guide part has, and it does not matter how the fixed piece part and the second bent part are joined, but for the work of inserting the fixed piece part into the elastic plate accommodating part. , The joint position between the fixed piece and the second bent part has an effect. For example, it is assumed that a pair of hinges are overlapped on the side wall on the container body side, and then the end of the fixed piece on the side opposite to the container is pushed in with a jig and inserted into the elastic plate accommodating portion. To do. If the second bent part is joined to the end of the fixed piece on the container body side, the fixed piece is guided by preventing the second bent part and the leaf spring from colliding with the guide part. Must be plugged into. In order to make it easier to insert the fixed piece into the guide and mass-produce it, it is desirable to do the following.
That is, the guide portion is formed between the pair of guide groove portions and the pair of guide groove portions that separately guide both side portions in the circumferential direction of the fixed piece portion and are opened in a state of facing each other in the circumferential direction. It is provided with a window portion through which the second bent portion is passed. When the upper lid is closed, the fixed piece portion is a fixed piece main body portion that extends in the tubular penetrating direction of the side wall, and is fixed by joining a second bent portion to the middle portion in the circumferential direction on the side opposite to the container main body. It is provided with a single main body portion and a leading portion extending from the fixed piece main body portion to the opposite side of the container main body and being inserted into the guide groove portion in advance of the fixed piece main body portion.

Further, the blocking portion may have a configuration that prevents the tip of the elastic plate from coming off from the accommodating portion for the elastic plate, and the inserted elastic plate may be welded or adhered to the accommodating portion for the elastic plate. However, considering the ease of mass production due to the ease of work, it is desirable to do the following.
That is, the blocking portion is located on the side opposite to the container body with respect to the internal space of the guide portion, and is fitted with the first blocking portion that blocks the movement of the fixed piece portion to the side opposite to the container body, and the fixing piece portion. It is provided with a second blocking portion that fits and blocks the movement of the fixed piece portion toward the container body side.

Further, the first blocking portion may or may not be joined to the side wall and the guide groove portion, but in order to firmly prevent the movement of the fixed piece portion to the side opposite to the container body, it is as follows. It is desirable to do.
That is, the first blocking portion is to partition the internal space formed between the side wall and the guide groove portion from the outside on the side opposite to the container body, and to join the side wall and the guide groove portion.

Further, the guide portion does not matter which part of the total length in the circumferential direction is guided with respect to the fixed piece portion, and does not matter whether the guide portion is independent of the pair of hinges. By the way, the elastic plate is arranged between the pair of hinges. When the guide portion is independent of the hinge, the guide portion must be formed so as to be separated from the pair of hinges in the circumferential direction, and the pair of hinge caps are further separated from each other, and the appearance of the hinge cap is increased. Get worse. Therefore, in order to improve the appearance of the hinge cap, it is desirable to do the following.
That is, the guide portion is provided with a pair of guide groove portions that separately guide both side portions of the fixed piece portion in the circumferential direction and open in a state of facing each other in the circumferential direction. The pair of guide groove portions protrude outward in the radial direction while being separated from the side wall in the circumferential direction, and the pair of peripheral guide pieces and the pair of peripheral guide pieces that guide the fixed piece from both sides in the circumferential direction. It is assumed that a pair of outer guide pieces are provided so as to project from the outer side in the radial direction in the above direction and guide the fixed piece portion from the outer side in the radial direction. Then, a part of the pair of hinges is used for the pair of peripheral guide pieces.

In the hinge cap of the present invention, the elastic plate extending from the upper lid toward the side wall is separated from the side wall during injection molding, and the insertion direction of the fixed piece portion as the tip of the elastic plate is from the side opposite to the container body. Since the direction is toward the container body side or from the container body side to the side opposite to the container body, it is the same as the penetrating direction of the side wall of the cap body, that is, the mold opening direction, and is easy to injection mold. , Suitable for mass production.

Further, in the hinge cap of the present invention, if the insertion direction of the fixed piece portion is directed from the container body side to the side opposite to the container body, the fixed piece portion is the accommodating portion for the elastic plate when the upper lid is closed. It is difficult to separate from and is suitable for mass production.

Further, if the hinge cap of the present invention has an outer peripheral recess between a pair of hinges on the outer peripheral surface of the side wall, for example, the space between the pair of hinges on the outer peripheral surface of the side wall is not recessed inward in the radial direction. Compared to the hinge caps formed on both sides of the pair of hinges in the circumferential direction, the outer guide piece is located inward in the radial direction by the amount of the recess in the outer peripheral recess, and the diameter of the hinge cap. The dimension in the direction becomes shorter. Moreover, in the hinge cap provided with the outer peripheral recess, the outer peripheral recess extends from between the pair of hinges toward the container body side with respect to the pair of hinges, so that when the fixing piece is inserted into the container body side, for example, the outer peripheral recess Compared to a hinge cap that is formed only between a pair of hinges, the fixed piece does not have to move in the radial direction, so it is easier to insert the fixed piece into the elastic plate accommodating part, which is suitable for mass production. There is.

Further, in the hinge cap of the present invention, if the fixed piece portion includes the fixed piece main body portion and the leading portion, the leading portion extends from the second bent portion to the side opposite to the container main body, so that the hinge cap is fixed. When one part is inserted into the elastic plate accommodating portion, the leading portion is inserted into the pair of guide groove portions first, and the second bent portion is located at the window portion between the pair of guide groove portions, and the pair of guide groove portions. Since it does not collide with the elastic housing, it is easy to insert the fixed piece into the elastic housing, which is suitable for mass production.

Further, in the hinge cap of the present invention, if the blocking portion includes the first and second blocking portions, the movement of the fixed piece portion to the opposite side of the container body is located on the opposite side of the first blocking portion. Since the fixing piece is blocked by the portion and the movement of the fixing piece to the container body side is blocked by the fitting of the second blocking portion and the fixing piece, the fixing piece is simply inserted into the elastic plate accommodating portion. Since the portion can be prevented from being separated from the elastic plate accommodating portion, the work is easier and more suitable for mass production than, for example, in addition to the insertion work, in which the elastic plate is welded or adhered to the elastic plate accommodating portion. ing.

Further, the hinge cap of the present invention has a configuration in which the internal space formed between the side wall and the guide groove portion is partitioned from the outside on the side opposite to the container body with respect to the configuration of the first blocking portion, for example, the first. Since the blocking portion of the above is joined to the side wall and the guide wall portion, the first blocking portion is firmly joined as compared with the case where the first blocking portion is joined to only one of the side wall and the guide wall portion. It is possible to firmly prevent the movement of the fixed piece portion to the side opposite to the container body.

Further, in the hinge cap of the present invention, if the guide portion is provided with a pair of guide groove portions and a part of the pair of hinges is used for the pair of peripheral guide piece portions of the pair of guide groove portions, for example, the guide portion. Since the guide portion and the hinge are integrated as compared with the case where the hinge is independent from the hinge, the appearance is improved.

It is a cross-sectional view which is the hinge cap of the 1st Embodiment of this invention, and shows the state in the mold. FIG. 1 is an enlarged cross-sectional view taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. It is a hinge cap of the first embodiment, and is the top view which shows the state in the mold. It is a front view which is the hinge cap of 1st Embodiment, and shows the state in the mold. It is explanatory drawing which shows the assembly state of the hinge cap of 1st Embodiment. It is explanatory drawing which shows the assembly state of the hinge cap of 1st Embodiment. It is sectional drawing which shows the open state of the hinge cap of 1st Embodiment. FIG. 8 is a sectional view taken along line IX-IX of FIG. It is sectional drawing which shows the closed state of the hinge cap of 1st Embodiment. It is a front view which shows the closed state of the hinge cap of 1st Embodiment. It is a top view which shows the closed state of the hinge cap of 1st Embodiment. It is a right side view which shows the closed state of the hinge cap of 1st Embodiment. It is a bottom view which shows the closed state of the hinge cap of 1st Embodiment.

The hinge cap 1 of the first embodiment of the present invention is an integrally molded product made of synthetic resin, and as shown in FIGS. 1, 8 and 10, it can be attached to a container body (not shown) and its contents can be discharged. A cap body 2, an upper lid 3 for opening and closing the cap body 2, a pair of hinges 4 for opening and closing the cap body 2 and the upper lid 3, and an elastic plate for applying an opening force and a closing force to the cap body 2 to the upper lid 3. The elastic plate accommodating portion 6 accommodating the elastic plate 5 in a state of being overlapped with the outer peripheral surface of the cap body 2 between the 5 and the pair of hinges 4 and 4, and the elastic plate accommodating portion 6 to the elastic plate. It is provided with a blocking portion 7 that prevents the tip portion of the portion 5 from coming off. As an example, the container body has a tubular shape with a bottom, and its mouth has a tubular shape. Further, in the following, as shown in FIGS. 10 to 14, the state in which the upper lid 3 is closed, that is, the closed state is the basic form. Unless otherwise specified, the closed state shall be explained.

FIGS. 1 to 5 show a hinge cap 1 in a mold for injection molding. The cap body 2 is a closing plate that closes the tubular side wall 21 attached to the mouth of the container body and the inner peripheral side of the opening end portion in one of the penetrating directions of the side wall 21 (the direction opposite to the container body). 22 and a tubular inner peripheral wall 23 extending from the closing plate 22 to the other direction (direction of the container body) of the side wall 21 and arranged at intervals from the inner surface of the side wall 21. In the illustrated example, one of the penetrating directions is an upward direction and the other direction is a downward direction. Further, in the illustrated example, the direction from the container body to the side opposite to the container body is upward, and the direction from the side opposite to the container body to the container body side is downward. Further, the radial direction of the tubular side wall 21 is hereinafter referred to as a radial direction.

The side wall 21 includes a cylindrical side wall body 21a and a female screw portion 21b as a connecting portion 21b that connects the side wall body 21a to the mouth portion of the container body. The female screw portion 21b spirally protrudes from the inner peripheral surface of the side wall main body 21a over the entire circumference thereof. Further, the outer peripheral surface of the upper portion of the side wall main body 21a is provided with a recessed portion 21d that is recessed inward in the radial direction on the side opposite to the elastic plate 5 in terms of its position in the circumferential direction.

The edge portion (also referred to as radial outer side and outer peripheral portion) of the closing plate 22 is joined (continuously) to the upper end portion of the side wall main body 21a over the entire circumference thereof. Further, the closing plate 22 is formed with a discharge hole 22a penetrating in the vertical direction, which is the thickness direction of the plate. Further, the nozzle 22c projects from the surface (upper surface) of the closing plate 22 opposite to the container body, and the internal space of the nozzle 22c leads to the discharge hole 22a. The edge portion 22b on the upper surface of the closing plate 22 is stepped lower than the inner side in the radial direction, and this lower surface serves as a contact surface with the end surface of the edge portion (outer peripheral portion) of the upper lid 3. ..

The inner peripheral wall 23 is formed concentrically with the center of the side wall 21. Further, the lower end of the inner peripheral wall 23 is located above the lower end of the female screw portion 21b. Further, the radial distance between the inner peripheral wall 23 and the side wall 21 is set to a length that accommodates the upper end portion of the mouth portion of the container body.

The upper lid 3 has an upper lid main body 31 that covers the closing plate 22 including the discharge hole 22a, and a protrusion 32 that protrudes from the upper lid main body 31 toward the cap main body 2 and enters and exits the inside of the discharge hole 22a as the upper lid 3 opens and closes. And a collar 33 that protrudes radially outward (outer peripheral side) from the edge of the upper lid main body 31.

In the illustrated example, the upper lid main body 31 includes an upper plate 31a and an upper frame 31b protruding from the entire circumference of the outer peripheral edge of the upper plate 31a toward the cap main body 2.
The upper plate 31a has a plate shape having the same shape as the closing plate 22.
The upper frame 31b is formed in an annular shape along the entire outer circumference of the upper plate 31a. This annular end surface (lower end surface) serves as a contact surface with the outer peripheral edge of the closing plate 22 of the cap body 2.

The collar 33 projects radially outward from a position corresponding to the recessed portion 21d of the side wall 21 on the outer peripheral surface of the upper frame 31b.
Further, on the upper plate 31a and the upper frame 31b, hinges 4, elastic plates 5, and hinges 4 are arranged in order along the circumferential direction of each other on the side opposite to the collar 33 in the circumferential direction. Then, in order to arrange the elastic plate 5, the upper plate 31a and the upper frame 31b (the edge of the upper lid 3) reach the lower end surface of the upper frame 31b from the outer peripheral portion of the upper plate 31a on the side opposite to the collar 33. A notch recess 34 is formed that is recessed inward in the radial direction as if it were notched. A part of the elastic plate 5 (first bent portion 51 and leaf spring portion 52, which will be described later) is arranged in the space inside the notch recess 34 in the closed state. In other words, the notch recess 34 is a storage hole 34 that accommodates the leaf spring portion 52 in the closed state.

The hinges 4 are formed on the first piece 41, which projects radially outward with respect to the upper lid 3, the hinge body 42, which is thinner than the first piece 41, and the side wall 21 in this order from the upper lid 3 toward the side wall 21. A second piece 43 that projects outward in the radial direction is provided. The hinge portion main body 42 is joined to the first piece portion 41 and the second piece portion 43, and serves as a central portion (when performing a rotational movement) when the upper lid 3 is opened and closed, and is a second piece. The thickness of the portion 43 is also reduced.

The elastic plate 5 has a plate shape and functions as a so-called leaf spring. Further, the elastic plate 5 extends from the upper lid 3 toward the side wall 21, one end thereof is joined to the upper lid 3, and the other end is separated from the side wall 21 at the time of injection molding and after injection molding. Is fixed to the side wall 21 in a superposed state. Further, the elastic plate 5 has a first bendable portion 51, a leaf spring portion 52, a second bendable portion 53 that can be freely bent, and an outer peripheral surface of the side wall 21 after injection molding, in this order from the upper lid 3 toward the side wall 21. A fixed piece portion 54 fixed in a state of being overlapped on the upper portion (the side opposite to the container body) is provided.

When the upper lid 3 opens and closes, the elastic plate 5 (leaf spring portion 52) rotates while being elastically deformed, and the second bent portion 53 is the central portion during the rotational movement. Then, in order to elastically deform the elastic plate 5 (leaf spring portion 52) when the upper lid 3 opens and closes, the central portion (second bent portion 53) of the rotational movement of the elastic plate 5 is the central portion of the rotational movement of the upper lid 3. It is eccentric with respect to (the hinge portion main body 42 of the hinge 4). The eccentric state is specifically as follows.

The second bent portion 53 is eccentric with respect to the penetrating direction of the tubular side wall 21 toward the opening end side in the other direction (downward) of the penetrating direction with respect to the hinge portion main body 42, and more specifically, Further, it is eccentrically arranged on the opening end side in the other direction from the lower surface of the closing plate 22. Further, the second bent portion 53 is arranged eccentrically inward in the radial direction with respect to the hinge portion main body 42 in the radial direction of the tubular side wall 21.
A leaf spring portion 52 is joined to one end of the elastic plate 5 in the longitudinal direction with respect to the second bent portion 53, and a fixed piece portion 54 is joined to the other end.

The fixed piece portion 54 extends from the second bent portion 53 and is thicker than the second bent portion 53. The fixed piece portion 54 is separated from the side wall 21 at the time of injection molding, but is overlapped and fixed on the side wall 21 after injection molding. The details of the fixed piece portion 54 will be described together with the elastic plate accommodating portion 6 described later.

The surface of the leaf spring portion 52 (the surface of the elastic plate 5) is in a state of being along the surface of the upper lid 3 in the closed state. Therefore, the surface of the elastic plate 5 and the surface of the upper lid 3 are in a state where there is no step or the step is within a dimension range shorter than the thickness of the leaf spring portion 52.
Further, in the closed state, the surface of the edge portion of the upper lid 3 is a curved surface, and the surface of the elastic plate 5 (particularly the leaf spring portion 52) is also a corresponding curved surface. In the illustrated example, the surface of the edge portion of the upper lid 3 is a bent surface (a surface in which the upper surface and the outer peripheral surface are bent and continuous), more specifically, an L-shaped bent surface, and the elastic plate 5 (particularly the leaf spring portion). The surface of 52) is also a bent surface (L-shaped bent surface).
Further, the leaf spring portion 52 has a plate shape that is bent in an L shape in the illustrated example. More specifically, as shown in FIG. 10, the leaf spring portion 52 includes a first leaf spring piece portion 52a extending radially from the center side in the radial direction of the upper lid 3 toward the outside, and a first leaf spring piece portion. It has a plate shape including a second leaf spring piece portion 52b extending from the outer end portion in the radial direction of 52a toward the other direction in the penetrating direction of the side wall 21. Further, as shown in FIGS. 12 and 13, the width of the first bent portion 51 (width in the circumferential direction), the width of the first leaf spring piece portion 52a, and the width of the upper portion of the second leaf spring piece portion 52b are It is in contact with the accommodating hole 34. The width of the lower portion of the second leaf spring piece portion 52b is shorter on both sides in the circumferential direction than the width of the upper portion of the second leaf spring piece portion 52b, and is separated from the accommodating hole 34. ..

Further, as shown in FIG. 8, the angle formed between the fixed piece portion 54 and the leaf spring portion 52 via the second bent portion 53 in the open state is equal to or less than an acute angle, or 0 degrees in the illustrated example, so-called parallel. It has become.

The first and second bent portions 51 and 53 are thinner than the leaf spring portion 52. The elastic plate accommodating portion 6 accommodates the fixed piece portion 54 as the tip portion of the elastic plate 5.

The elastic plate accommodating portion 6 is formed between the two second piece portions 43, 43 of the two hinges 4, 4 (see FIG. 2). Further, as shown in FIG. 12, the two hinges 4 and 4 project in parallel from the outer peripheral surface of the upper lid 3. When the hinge cap 1 is viewed from above in the closed state, the outer peripheral surface of the elastic plate accommodating portion 6 is arranged inside the outer peripheral surfaces of the pair of hinges 4 and 4 in the radial direction.

The elastic plate accommodating portion 6 projects from the outer peripheral surface of the side wall 21 and accommodates the fixed piece portion 54 of the elastic plate 5 in a state of being overlapped with the outer peripheral surface of the side wall 21. The elastic plate accommodating portion 6 is a guide portion 61 that guides the elastic plate accommodating portion 6 so as to sandwich the fixed piece portion 54 in cooperation with the side wall 21 (side wall main body 21a) after injection molding in the radial direction, and the guide portion 61 in the circumferential direction. A guide portion 61 for guiding the fixed piece portion 54 by itself is provided.

As shown in FIGS. 2, 8 and 9, the guide portion 61 has a fixed piece portion 54 inserted upward (from the container body side toward the opposite side of the container body). Further, the guide portion 61 is formed between the pair of guide groove portions 62, 62 and the pair of guide groove portions 62, 62 that separately guide both side portions in the circumferential direction of the fixed piece portion 54 after injection molding, and is a second guide portion 61. It is provided with a window portion 61a through which the bent portion 53 is passed after injection molding.

The pair of guide groove portions 62, 62 extend in the vertical direction, which is the penetrating direction of the tubular side wall 21, and open in a state of facing each other in the circumferential direction. Further, the pair of guide groove portions 62, 62 guide the fixed piece portions 54 from both sides in the circumferential direction and from the outside in the radial direction. By the way, it is the side wall 21 (side wall main body 21a) that guides the fixed piece portion 54 from the inside in the radial direction. Further, the guide groove portion 62 includes a peripheral guide piece portion 63 that guides the fixed piece portion 54 from one side in the circumferential direction, and an outer guide piece portion 64 that guides the fixed piece portion 54 from the radial outside.

The pair of peripheral guide pieces 63, 63 project radially outward in a state of being separated from the side wall 21 (side wall main body 21a) in the circumferential direction. Further, in the present embodiment, the pair of peripheral guide pieces 63, 63 are also a part of the pair of hinges 4, 4 (the pair of second piece portions 43, 43).

The pair of outer guide pieces 64, 64 project from the radial outer side of the pair of peripheral guide pieces 63, 63 in a direction in which the distance between the two guide pieces 64, 64 is narrowed. In the present embodiment, the pair of outer guide pieces 64, 64 are separated in the circumferential direction, and the separated portions are the window portions 61a described above. The radial distance between the pair of outer guide pieces 64, 64 and the side wall 21 is slightly larger than the thickness of the fixed piece 54.

Further, as shown in FIG. 14, since the outer guide piece portion 64 guides the fixed piece portion 54 from the radial outside, the cap main body 2 has a larger radial dimension than the cap main body without the outer guide piece portion 64. Become. Therefore, in order to make the radial dimension of the cap body 2 as small as possible, the side wall 21 (side wall body 21a) is placed between a pair of hinges 4, 4 (a pair of second piece portions 43, 43) on the outer peripheral surface thereof. The outer peripheral recess 21c is provided so as to be recessed inward in the radial direction and to overlap the fixed piece portion 54. The thickness of the side wall 21 is such that the portion of the outer peripheral recess 21c is thinner than the portions on both sides in the circumferential direction with respect to the outer peripheral recess 21c.

As shown in FIGS. 2 and 9, the outer peripheral recess 21c is continuously formed not only between the pair of hinges 4 and 4, but also below the hinge 4. Further, the upper portion of the outer peripheral recess 21c is located between the pair of hinges 4 and 4, and a pair of outer guide pieces 64 and 64 are arranged on both sides in the circumferential direction with respect to the upper portion of the outer peripheral recess 21c. Then, the lower end side of the pair of guide groove portions 62, 62 including the pair of outer guide piece portions 64, 64 and the side wall 21 cooperate with each other to form an opening for an entrance into which the fixed piece portion 54 is inserted. It is the blocking portion 7 that prevents the fixed piece portion 54 inserted through the opening from being separated from the pair of guide groove portions 62, 62 (guide portions 61) in the vertical direction.

As shown in FIG. 9, the blocking portion 7 is provided on the first blocking portion 71 and the guide portion 61 that prevent the fixed piece portion 54 housed in the guide portion 61 from moving to the opposite side (upward) from the container body. A second blocking portion 72 that blocks the movement of the housed fixed piece portion 54 toward the container body side (downward) is provided.

The first blocking portion 71 partitions the internal space formed between the side wall 21 and the guide groove portion 62 from the outside on the opposite side (upper side) of the container body, and is joined to the side wall 21 and the guide groove portion 62. .. More specifically, the first blocking portion 71 is a pair of partition plates 71a, 71a that separately partition the upper ends of the pair of guide groove portions 62, 62 and the side wall 21 in the vertical direction.

As shown in FIGS. 2, 3 and 9, the second blocking portion 72 is a fitting recess 73 and a fitting protrusion 74 that fit the guide portion 61 and the fixing piece portion 54 by unevenness. The fitting recess 73 is formed on one of the guide portion 61 and the fixed piece portion 54, and the fitting convex portion 74 is formed on the other of the guide portion 61 and the fixed piece portion 54. Further, in the present embodiment, the direction of the unevenness of the fitting concave portion 73 and the fitting convex portion 74 is the circumferential direction.

The fitting recess 73 is formed in the upper part of the guide portion 61. More specifically, the fitting recess 73 is formed by a pair of facing surfaces 63a, 63a on the pair of peripheral guide pieces 63, 63. The pair of facing surfaces 63a and 63a are inclined surfaces that are inclined so that the distance between them in the circumferential direction increases as the distance increases upward. The pair of facing surfaces 63a, 63a are symmetrical. Further, the inclination angles of the pair of facing surfaces 63a and 63a are slightly inclined (within 10 degrees) with respect to the vertical direction, and it cannot be determined in FIG. 9 that they are inclined.

As shown in FIGS. 2, 3 and 9, the fitting convex portion 74 is a pair of side surfaces 54a and 54a of the fixed piece portion 54 in the circumferential direction. The pair of side surfaces 54a, 54a are inclined so as to correspond to the pair of facing surfaces 63a, 63a in the pair of peripheral guide pieces 63, 63, and the dimensions of both sides in the circumferential direction increase as they go upward. As a face. Therefore, the circumferential dimension at the upper end of the fitting convex portion 74 is larger than the circumferential distance at the lower end of the fitting recess 73, and the fixed piece portion 54 is dimensionally inserted into the upper portion of the guide portion 61. It is not in a state. Therefore, when the fixed piece portion 54 is inserted into the guide portion 61, the elastic deformation between the fixed piece portion 54 and the guide portion 61 is utilized. The elastic deformation is obtained by the elasticity of the synthetic resin of the fixed piece portion 54 and the guide portion 61.

The fitting recess 73 is formed in the upper part of the guide portion 61. Further, an introduction portion 66 for introducing the fixing piece portion 54 into the fitting recess 73 is formed in the lower portion of the guide portion 61. That is, the guide portion 61 is provided with a fitting recess 73 at its upper portion and an introduction portion 66 at its lower portion.

The introduction portion 66 is provided with an insertion portion 67 at the lower portion thereof, which facilitates insertion of the fixed piece portion 54 in the circumferential direction, and at the upper portion thereof, an introduction portion for introducing the fixed piece portion 54 from the insertion portion 67 into the fitting recess 73. The main body 68 is provided.

The introduction portion main body 68 is formed by a pair of facing surfaces 63c and 63c of intermediate portions relating to the upper and lower sides of the pair of peripheral guide piece portions 63 and 63. The distance between the pair of facing surfaces 63c and 63c gradually decreases upward. In other words, the circumferential interval of the introduction portion main body 68 gradually decreases from the insertion portion 67 toward the fitting recess 73, and the fixing piece portion 54 is introduced from the insertion portion 67 to the lower end of the fitting recess 73.

The insertion portion 67 is formed by a pair of lower facing surfaces 63b, 63b in the pair of peripheral guide piece portions 63, 63. Further, the circumferential interval of the insertion portion 67 is larger than the maximum dimension of the fixed piece portion 54 in the circumferential direction, so that the fixed piece portion 54 can be easily inserted. Further, the insertion portion 67 is formed so as to extend to both sides in the circumferential direction with respect to directly below the fitting recess 73. Further, the fixed piece portion 54 is provided with a configuration for facilitating insertion into the insertion portion 67.

In the closed state of the upper lid 3, as shown in FIGS. 3 and 9, the fixed piece portion 54 extends in the vertical direction and is joined to the fixed piece portion main body 55 to which the second bent portion 53 is joined to the side (upper part) opposite to the container main body. It is provided with a leading portion 56 that protrudes upward from the fixed piece main body 55 and is inserted into the guide portion 61 in advance of the fixed piece main body 55.
As shown in FIG. 1, the fixed piece main body 55 has a second bent portion 53 joined to the outer side in the radial direction at the upper portion thereof.
The leading portion 56 is a pair of protruding piece portions 57, 57 that project upward from the upper surfaces of both side portions in the circumferential direction of the fixed piece portion main body 55.

Further, in the following, the angle formed by the cap body 2 and the upper lid 3 is defined as the opening angle θ. Then, the opening angle θ in the closed state of the upper lid 3 is set to 0 degrees. Further, the opening angle θ in the open state of the upper lid 3 is defined as the fully open angle. Then, in the state where the opening angle θ is between 0 degree and the fully open angle (an angle larger than 180 degrees in the illustrated example), that is, in the so-called half-opened state of the hinge cap 1, the leaf spring portion 52 is bent in an L shape. The angle is wider than the angle in the fully closed state (angle of about 90 degrees). The expanded state of the leaf spring portion 52 becomes the restoring force of the leaf spring portion 52. Then, in the half-opened state, the restoring force tries to open the upper lid 3 (opening force) or closes at a predetermined opening angle θ (an angle larger than 90 degrees and smaller than 180 degrees). It will change to the force to do (closing force).

The hinge cap 1 in the above description is fixed in a state where the fixing piece portion 54 is overlapped with the outer peripheral surface of the side wall 21, and the fully open angle is larger than 180 degrees as shown in FIG. However, the hinge cap 1 is in a state where the opening angle θ is 180 degrees as shown in FIG. 1 at the time of injection molding. At this time, the elastic plate 5 is in a state of being bent at the first and second bent portions 51 and 53, as if it were bent in an N shape. More specifically, the N-shape is a state in which the V-shape of the leaf spring portion 52 and the I-shape of the fixed piece portion 54 are joined by the second bent portion 53. In the mold design, since the tip of the elastic plate 5 is separated from the side wall 21 at the time of injection molding, for example, it is compared with the case where the elastic plate 5 is joined to the upper lid 3 and the side wall 31 at the time of injection molding. This makes it easier to design the V-shaped internal angle (acute angle in the figure) of the leaf spring portion 52. Further, since the V-shaped internal angle of the leaf spring portion 52 affects the closing force of the upper lid 3 in the closed state of the cap, the fact that the tip of the elastic plate 5 is separated from the side wall 21 at the time of injection molding is known. It can be said that it becomes easier to design the closing force of the upper lid 3.

Further, the internal space formed between the elastic plate accommodating portion 6 and the side wall 21 is in a state of communicating downward. The internal space and the elastic plate 5 formed between the elastic plate accommodating portion 6 and the side wall 21 are in a state where there is no so-called undercut in molding. Then, the elastic plate 5 is separated from the side wall 21 at the time of injection molding, and the insertion direction of the fixed piece portion 54 as the tip portion of the elastic plate 5 is upward (direction from the container body side to the side opposite to the container body). Therefore, it is the same as the penetrating direction of the side wall 21 of the cap body 2, that is, the mold opening direction of the mold, and is easy to injection mold and suitable for mass production. Therefore, it is easy to take out the hinge cap 1 from the mold after injection molding.

After injection molding, the fixed piece portion 54 is fixed to the elastic plate accommodating portion 6 for assembly. The assembly procedure is as follows.
1) First, take out the hinge cap 1 from the mold. Then, the upper lid 3 can be opened and closed around the hinge 4.
2) Next, as shown in FIG. 6, the upper lid 3 is pushed downward by the jig 91 while holding the hinge cap 1 in a state where the penetrating direction of the tubular side wall 21 faces up and down. Then, the upper lid 3 rotates around the hinge portion main body 42 of the hinge 4 so as to increase the opening angle, and the fixed piece portion 54 collides with the outer peripheral surface (outer peripheral recess 21c) of the side wall 21 below the hinge 4. And it becomes a state of overlapping.
3) Next, as shown in FIG. 7, the fixing piece portion 54 is pushed upward from the lower end surface thereof by another jig 92. Then, the fixed piece portion 54 moves while overlapping with the outer peripheral recess 21c, is inserted into the elastic plate accommodating portion 6, and finally the fitting recess 73 and the fixed piece portion of the guide portion 61 of the elastic plate accommodating portion 6. The fitting convex portion 74 of 54 is fitted. When the fixed piece portion 54 is fixed to the elastic plate accommodating portion 6, the central portion of the elastic plate 5 in the rotational movement when the upper lid 3 is opened and closed becomes the second bent portion 53.
4) Finally, close the upper lid 3 while the hinge cap 1 is still warm.
5) When opened after sufficiently cooling, the opening angle θ becomes larger than 180 degrees as shown in FIG. By the way, when verifying the form of the fixed piece portion 54 from the assembled hinge cap 1 in the closed state, the fixed piece portion 54 is pushed downward by a jig (not shown) to be separated from the elastic plate accommodating portion 6. Then, the elastic plate 5 has a form that approximates the state at the time of injection molding. That is, the elastic plate 5 is arranged above the upper lid 3, and is in a state of being bent at the first and second bent portions 51 and 53, that is, in a state of being bent in an N shape.

In the hinge cap 1 of the first embodiment, the insertion direction of the fixed piece portion 54 is upward, and the direction is from the container body side to the side opposite to the container body. Therefore, the fixed piece portion is in the closed state of the upper lid 3. The 54 is difficult to separate from the elastic plate accommodating portion 6, and is suitable for mass production.

Further, in the hinge cap 1 of the first embodiment, since the outer peripheral recess 21c is formed between the pair of hinges 4 and 4 on the outer peripheral surface of the side wall 21, for example, between the pair of hinges 4 and 4 on the outer peripheral surface of the side wall 21. Compared to the hinge caps formed in the same manner on both sides in the circumferential direction with respect to the pair of hinges 4 and 4 without denting inward in the radial direction, the outer guide piece portion 64 has the amount of dent in the outer peripheral recess 21c. Since it is located inside in the radial direction, the radial dimension of the hinge cap 1 is shortened. Moreover, in the hinge cap 1 of the first embodiment, since the outer peripheral recess 21c extends from between the pair of hinges 4 and 4 toward the container body side with respect to the pair of hinges 4 and 4, the fixing piece portion 54 is placed in the container. Compared to a hinge cap in which the outer peripheral recess 21c is formed only between a pair of hinges 4 and 4, for example, when the fixing piece portion 54 is inserted into the main body side, the fixing piece portion 54 does not have to move in the radial direction. The 54 can be easily inserted into the elastic plate accommodating portion 6, and is suitable for mass production.

Further, in the hinge cap 1 of the first embodiment, the fixed piece portion 54 includes the fixed piece portion main body 55 and the leading portion 56, and the leading portion 56 is above the second bent portion 53 (the side opposite to the container main body). When the fixed piece portion 54 is inserted upward into the elastic plate accommodating portion 6, the leading portion 56 is inserted into the pair of guide groove portions 62, 62 first, and the second bent portion 53 is paired. Since it is located in the window portion 61a between the guide groove portions 62 and 62 and does not collide with the pair of guide groove portions 62 and 62, the fixed piece portion 54 can be easily inserted into the elastic plate accommodating portion 6 and is suitable for mass production.

Further, in the hinge cap 1 of the first embodiment, since the first blocking portion 71 is located above the internal space of the guide portion 61 (on the side opposite to the container body), the fixing piece portion 54 can be moved upward. It is blocked by the collision with the first blocking portion 71, and the second blocking portion 72 is fitted with the fixed piece portion 54, so that the downward movement of the fixed piece portion 54 is blocked by the fitting. As a result, it is possible to prevent the fixed piece portion 54 from being separated from the elastic plate accommodating portion 6 simply by inserting the fixing piece portion 54 into the elastic plate accommodating portion 6. Therefore, for example, in addition to the insertion work, the elastic plate 5 is used for the elastic plate. Assembling work is easier and more suitable for mass production than those that are welded or adhered to the accommodating portion 6.

Further, in the hinge cap 1 of the first embodiment, the internal space formed by the first blocking portion 71 between the side wall 21 and the guide groove portion 62 is partitioned above and below the outside on the upper side of the guide groove portion 62, and the first Since the blocking portion 71 is joined to the side wall 21 and the guide groove portion 62, for example, the first blocking portion 71 is compared with the one in which the first blocking portion 71 is joined to only one of the side wall 21 and the guide groove portion 62. The 71 is firmly joined, and the movement of the fixed piece portion 54 to the upper side (the side opposite to the container body) can be firmly prevented.

Further, in the hinge cap 1 of the first embodiment described above, the guide portion 61 is provided with a pair of guide groove portions 62, 62, and the pair of the peripheral guide piece portions 63, 63 of the pair of guide groove portions 62, 62 is paired. Since a part of the hinges 4 and 4 of the above is used, the appearance is good because the guide portion 61 and the hinge 4 are integrated as compared with the case where the guide portion 61 is independent from the hinge 4, for example. become.

The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention. For example, in the above embodiment, the second bent portion 53 is joined to the upper end portion of the fixed piece main body 55, but the present invention is not limited to this, and even if the second bent portion 53 is joined to the lower end portion or the intermediate portion. good. Further, in the above embodiment, the fixed piece portion 54 includes a leading portion 56 in addition to the fixed piece portion main body 55, but the present invention is not limited to this, and the fixed piece portion 54 may include only the fixed piece portion main body 55. good. Further, regarding the dimensions in the circumferential direction, in the above embodiment, as shown in FIG. 9, the outer peripheral recess 21c is longer on both sides in the circumferential direction with respect to the portion between the pair of hinges 4 and 4 below the hinge 4, and is shown in FIG. As shown in the above, the lower side of the hinge 4 is flat, but the present embodiment is not limited to this, and the lower side of the hinge 4 is extended downward as it is from the lower end in the portion between the pair of hinges 4 and 4. It may be formed so that the lower side of the hinge 4 is recessed in the same manner as the portion between the pair of hinges 4 and 4. In this way, the lower side of the outer peripheral recess 21c below the hinge 4 functions as a guide that makes it difficult for the fixed piece portion 54 to move in the circumferential direction. Since the injection-molded product undergoes heat shrinkage after molding, the size after cooling is slightly shorter than the size at the assembly stage. The heat shrinkage rate is not the same at any part of the hinge cap 1, and depends on factors such as thickness and shape. Therefore, the portion of the outer peripheral recess 21c below the hinge 4 has a slightly longer circumferential dimension than the fixed piece portion 54 at the assembly stage, and the fixed piece portion 54 easily fits and functions as a guide. Even in this case, after cooling, the size in the circumferential direction may be slightly shorter than that of the fixed piece portion 54, and it may be difficult for the fixed piece portion 54 to fit.

1 Hinge cap 2 Cap body 21 Side wall 21a Side wall body 21b Connecting part (female threaded part)
21c Outer peripheral recess 21d Recess 22a Closure plate 22a Discharge hole 22b Edge 22c Nozzle 23 Inner peripheral wall 3 Top lid 31 Top lid body 31a Top plate 31b Top frame 32 Protrusion 33 Brim 34 Notch recess (accommodation hole)
4 hinge 41 first piece 42 hinge body 43 second piece 5 elastic plate 51 first bent part 52 leaf spring part 52a first leaf spring piece 52b second leaf spring piece 53 second Bent part 54 Fixed piece part 54a Side surface 55 Fixed piece part Main body 56 Leading part 57 Protruding piece part 6 Elastic plate accommodating part 61 Guide part 61a Window part 62 Guide groove part 63 Circumferential guide piece part 63a, 63b, 63c Facing surface 64 Outer guide piece 66 Introducing part 67 Inserting part 68 Introducing part Main body 7 Blocking part 71 First blocking part 71a Partition plate 72 Second blocking part 73 Fitting recess 74 Fitting convex part 91, 92 Jig θ Opening angle

Claims (7)

A tubular side wall to be attached to the container body, a cap body including a closing plate that closes one open end of the side wall and has a discharge hole for the contents, and a cap body.
The top lid that covers the closing plate and
A pair of hinges that are openable and closable to join the cap body and the top lid, and are arranged at intervals in the circumferential direction of the cap body and the top lid.
An elastic plate that applies an opening force and a closing force to the cap body between the pair of hinges and whose surface is a curved surface along the surface of the upper lid in the closed state.
An elastic plate accommodating portion that accommodates the tip of the elastic plate in a state of being overlapped with the side wall between the pair of hinges.
It is an integrally molded product made of synthetic resin provided with a blocking portion for preventing the tip of the elastic plate from detaching from the accommodating portion for the elastic plate.
The elastic plate extends from the upper lid toward the side wall of the cap body, and is stacked on the first bendable portion, the leaf spring portion, the second bendable portion that can be bent, and the side wall in this order from the upper lid to the side wall. It is fixed in a combined state and has a fixed piece part that is separated from the side wall during injection molding.
The upper lid has an accommodating hole at its edge for accommodating the leaf spring portion in the closed state.
The accommodating portion for the elastic plate is a guide portion that guides the fixed piece portion in cooperation with the side wall so as to sandwich the fixed piece portion from the radial direction in the side wall, and includes a guide portion into which the fixed piece portion is inserted.
A hinge cap characterized in that the insertion direction of the fixed piece portion is a direction from the side opposite to the container body toward the container body side, or a direction from the container body side toward the side opposite to the container body. The hinge cap according to claim 1, wherein the insertion direction of the fixed piece portion is a direction from the container body side to the side opposite to the container body. The side wall is provided with an outer peripheral recess between a pair of hinges on the outer peripheral surface, which is recessed inward in the radial direction and in which the fixed piece main body is overlapped.
The hinge cap according to claim 2, wherein the outer peripheral recess extends from between the pair of hinges toward the container body with respect to the pair of hinges. The guide portion is formed between a pair of guide groove portions that separately guide both side portions in the circumferential direction of the fixed piece portion and are opened in a state of facing each other in the circumferential direction, and a second guide groove portion. It is equipped with a window part that allows the bent part to pass through.
In the closed state of the upper lid, the fixed piece is a fixed piece main body extending in the tubular penetrating direction of the side wall, and the second bent part is joined to the middle portion in the circumferential direction on the side opposite to the container main body. The second or third aspect of the present invention, wherein the main body portion is provided with a leading portion extending from the fixed piece main body portion to the side opposite to the container main body and being inserted into the guide groove portion in advance of the fixed piece main body portion. Hinge cap. The blocking portion is located on the side opposite to the container body with respect to the internal space of the guide portion, and is fitted with the first blocking portion that blocks the movement of the fixed piece portion to the side opposite to the container body, and the fixing piece portion. The hinge cap according to claim 2, 3 or 4, further comprising a second blocking portion for blocking the movement of the fixing piece portion toward the container body side. The first blocking portion is characterized in that the internal space formed between the side wall and the guide groove portion is partitioned from the outside on the side opposite to the container body and is joined to the side wall and the guide groove portion. The hinge cap according to claim 5. The guide portion includes a pair of guide groove portions that separately guide both side portions of the fixed piece portion in the circumferential direction and open in a state of facing each other in the circumferential direction.
The pair of guide groove portions are formed in a pair of peripheral guide pieces and a pair of peripheral guide pieces that project outward in the radial direction while being separated from the side wall in the circumferential direction and guide the fixed piece from both sides in the circumferential direction. It is provided with a pair of outer guide pieces that project from the radial outside in a direction that narrows the distance between them and guide the fixed piece from the radial outside.
The hinge cap according to claim 1, 2, or 3, wherein the pair of peripheral guide pieces is also a part of the pair of hinges.

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