JP5015687B2 - Synthetic resin hinge lid - Google Patents

Description

  The present invention relates to a container lid used in a state where a resin lid is attached to a cylindrical container opening, the lid has a hinge portion, and the lid is an opening of a container such as a can. In particular, the present invention relates to a hinge lid that can be opened while being attached to the inside and can take out contents such as powder with a spoon, and the like, and more particularly, relates to a hinge lid that can keep the lid open when used. .

  Various types of hinge lids of this type have been proposed. For example, when the hinge lid is opened, the side wall portion is broken and separated, and one separated is a fixed portion fixed to the container, and the other is a hinge. The opening / closing part that can be opened / closed around this part is opened, and when this opening / closing part is opened and the hinge lid is opened, the end of the separated side wall part on the opening / closing part side engages with the opening end of the container By doing so, there is a hinge lid that can keep the lid open (see Patent Documents 1 and 2).

  In the hinge lid as described above, when the hinge lid is first opened, the side wall portion is broken and separated, and the end portion of the separated side wall portion on the opening / closing portion side is engaged with the opening end portion of the container. And the lid remains open. When the lid is closed, the end of the engaged side wall is elastically deformed outward from the end of the container opening, and the engagement is released and the lid can be closed.

The hinge lid as described above is configured such that the side wall portion is separated at a position shifted by a predetermined amount from the hinge portion toward the fixed portion side in order to maintain the lid open. By doing in this way, the state where the hinge lid is opened at a larger angle is maintained by shifting the position of the end portion of the separated side wall portion on the opening / closing portion side to the fixed portion side rather than the thin portion of the hinge portion. Can do. In such a case, an engagement portion is formed which has a shape as shown in FIG. 11 and is broken and separated at a position where the side wall portion deviates from the position of the hinge portion to the fixed portion side and engages with the opening end portion of the container. Then, as shown in FIG. 12, when the opening / closing part is opened, the hinge lid is configured to maintain a state where the lid is opened at a predetermined angle.
JP 2000-281116 A JP 2003-267420 A

  In the case of the hinge lid as described above, among the separated end portions of the engaging portion, the region located on the hinge portion side with the lid open, that is, the end portion of the engaging portion with the lid closed. A relatively upper region is engaged with the container opening end to maintain the lid open. FIG. 10 is a top view of the hinge lid, showing the positional relationship between the position of the container opening end and the engaging portion when the opening / closing portion is open.

  As shown in FIG. 10, an area located on the opening / closing part side with the lid opened in the side wall part, that is, an area located relatively lower with the lid closed on the end part of the engaging part. The tip end of the end portion floats at a position where it does not engage with the opening end portion and slightly enters inward from the opening end portion (a non-contact region indicated by a hatched portion in FIG. 10). When the user tries to close the lid in such a state, the end of the engaged side wall may not be elastically deformed outward from the container opening. Falls into the inside of the container opening and is caught by the opening end, and the side wall is deformed so as to be folded inward, and the lid may not be closed. Such a phenomenon is relatively unlikely to occur when the opening / closing part is once moved in the opening direction to remove the end of the engaging part from the container opening end and then the opening / closing part is tightened. This is likely to occur when the opened / closed portion is to be closed without moving the maintained opening / closing portion once in the opening direction and the engagement portion is engaged with the opening end. This is because the engaging portion is curved in an arc shape, so that it is deformed to bend slightly inward while maintaining the open state and engaging the container opening end. . From this state, once the opening / closing part is opened and the engaging part is removed from the opening end, the engaging part is deformed to the outside by the restoring force. However, if the lid is closed without performing such an operation, the engagement portion bent inward is easily folded inward, and therefore, A state in which the lid does not close easily occurs. In such a case, the user must open the lid again, deform the engaging portion that is folded inward and deforms outward, and then close the lid again, and the opening / closing operation cannot be performed smoothly. there were.

  In view of the problems of the prior art as described above, the present invention can satisfactorily close the lid without opening the side wall to the container opening when opening and closing the hinge lid that is kept open. An object of the present invention is to provide a hinge lid that can be smoothly opened and closed.

The invention according to claim 1 is provided on the top plate portion, the hinge portion provided on the top plate portion, the side wall portion depending from the periphery of the top plate portion, and the inner surface side of the side wall portion. A synthetic resin hinge lid having a locking portion for engaging with an opening end portion of a container, wherein the top plate portion is always fixed to the opening portion of the container with the hinge portion as a boundary. The fixed part, the other is fixed to the opening of the container when the opening of the container is closed, and closes the opening of the container, and when the opening of the container is opened, the opening is lifted upward with the hinge as a rotation axis and a closing portion for opening the opening of the container by the operation, the side wall portion, by opening operating the opening and closing portion, the fixing portion than the hinge portion to the upper end of the front Symbol sidewall portion A side wall portion that is separated into the fixed portion side and the opening and closing portion side at a position shifted to the side The synthetic resin hinge lid is attached to the opening end of the container between the side wall separating portion and the hinge portion by opening the opening / closing portion. contains at least the side wall portion and the top plate separating portion for separating the top plate portion is provided, the top plate separating unit connected to said side wall separating unit region located immediately above the container opening end when the When the opening / closing part is opened, the upper end of the side wall part is separated at a position shifted from the hinge part to the fixed part side, and can be engaged with the container opening end part. The synthetic resin hinge lid is characterized in that the engaged portion is formed.

  According to a second aspect of the present invention, in the synthetic resin hinge lid according to the first aspect, the end of the engaging portion is engaged with the opening end of the container when the opening / closing portion is kept open. The mating engagement side is provided with a predetermined length from the upper end of the end of the engagement part, and does not engage with the container opening end when the engagement side is engaged with the container opening end. A synthetic resin hinge lid characterized in that a non-engaging side portion is formed to extend toward the opening / closing portion side below the engaging side portion.

  According to a third aspect of the present invention, in the synthetic resin hinge lid according to the second aspect, the non-engaging side portion is inclined below the engaging side portion and extends toward the opening / closing portion side. It is a synthetic resin hinge lid characterized by including a part in at least a part.

According to the invention described in claim 1, the side wall portion, at a position shifted to the fixed portion side of the hinge portion, by opening operation of the opening and closing portion, the fixed portion to the upper end portion of the side wall portions A side wall separation part for separating the side wall part from the side wall part on the side of the opening and closing part is provided, and the opening and closing part is opened on the top plate part, so that the space between the side wall separation part and the hinge part is provided. Then, when the hinge lid is attached to the opening end of the container, a top plate separating part that separates the side wall part and the top plate part including at least a region located immediately above the container opening end part is provided, By providing the side wall separating portion and the top plate separating portion so as to be connected, the side wall separating portion is first separated by lifting the end of the opening / closing portion opposite to the hinge portion of the hinge lid upward. In addition, the top plate separation part is separated and the hinge part is The engaging portion having an end portion displaced to the fixed portion side position is formed, the engagement portion can be engaged with the container open end to open the hinged lid.

  That is, as shown in FIGS. 5 and 6, since the side wall separating portion is formed at a position shifted from the hinge portion to the fixed portion side by a predetermined width, when the opening / closing portion is lifted upward, the side wall separating portion is An engagement side portion that can be engaged with the container opening end when the opening / closing portion is opened is formed at a position separated from the outer periphery of the container opening end at the hinge portion by a distance L inside the container. The In addition, since the top plate separation part is formed between the side wall separation part and the hinge part, including a region located immediately above the opening end when the hinge lid is mounted on the opening end of the container. When the end of the opening / closing part opposite to the hinge part is lifted upward, the top plate part is separated from the upper part of the side wall part as shown in FIG. As a result, the engaging portion having an end portion is formed at a position shifted from the hinge portion toward the fixed portion. When the opening / closing part is opened, the engaging part is elastically deformed so as to open outward along the side surface of the container opening end, and when the engaging part is positioned higher than the container opening end, Since it is possible to engage with the opening end and the engagement portion extends to the upper end of the side wall portion, the engagement portion is reinforced compared to the conventional case, and the engagement portion is opened in the container. When locked to the end portion, it is difficult to cause deformation such that the engaging portion bends inward. Therefore, it is prevented that the engaging part is caught by the container opening end part and the opening / closing part is not closed. Furthermore, even if the engagement portion has a shape such that a non-engagement side portion to be described later is provided in the engagement portion, the engagement portion can maintain an appropriate strength, so that the open / close portion can be stably maintained in an open state.

  According to a second aspect of the present invention, an engagement side part that engages with the container opening end when the opening / closing part is maintained in an open state is provided at an end of the engagement part. A non-engagement side portion that is provided at a predetermined length from the upper end of the portion and does not engage with the container opening end portion in a state where the engagement side portion engages with the container opening end portion is below the engagement side portion. By closing the hinge lid with the opening / closing part kept open, the end of the engaging part may be folded inward from the container opening end. In addition, it is possible to prevent the engaging portion from being caught by the container opening end and the lid from being closed, and the hinge lid can be opened and closed satisfactorily.

  That is, the engagement side portion that engages with the container opening end when engaging with the container opening end with a predetermined length from the upper end of the end of the engagement portion and maintaining the open / close portion in an open state. A non-engagement side portion that is provided with a predetermined length from the upper end of the end portion of the engagement portion and that does not engage with the container opening end portion when the engagement side portion engages with the container opening end portion is the engagement portion. By being formed so as to extend toward the opening / closing part side below the joint side part, among the engaging parts formed on the side wall part, a part of the region on the opening / closing part side from below the engaging side part is formed. An engaging portion shaped like a cut-out is formed. Therefore, when the hinge lid that is kept open is closed, there is no portion that folds inside the container opening. When the lid is closed like the conventional hinge lid, the engaging portion is the opening end. It is possible to prevent the lid from being closed by being caught on the door, and the hinge lid can be opened and closed satisfactorily.

  In the invention according to claim 3, by providing the inclined portion on the non-engagement side portion connected to the engagement side portion, the side wall portion of the hinge lid is sequentially deformed to the outside of the container while contacting the container opening end portion. Therefore, while preventing the engaging portion or the side wall portion of the hinge lid from being caught by the container opening end portion, the resistance when closing the opening / closing portion is further reduced, and the hinge lid can be closed smoothly.

  Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of a synthetic resin hinge lid according to the first embodiment, FIG. 2 is a side view thereof, FIG. 3 is a bottom view thereof, and FIG. 4 is a cross-sectional view taken along line AA of FIG.

  5 is a partially enlarged plan view in which a region including the top plate separating portion 10a and the side wall separating portion 20a at one end of the hinge portion 2 is enlarged, and FIG. 6 is a side view separating portion 20a and an inclined non-engagement. FIG. 7 is a partially enlarged side view in which a region including the side portion 21 is enlarged, and FIG. 7 is a partially enlarged bottom view in which a region including the side wall separating portion 20a and the non-engaging side portion 21 is enlarged at one end of the hinge portion 2. FIG. 8 is a perspective view showing a state where the hinge lid 1 of the present invention is mounted on a container, and FIG. 9 is a perspective view showing a state where the hinge lid 1 of the present invention mounted on the container is opened.

  The hinge lid 1 in the first embodiment is formed of a synthetic resin. The resin used may be a resin used for this kind of lid, cap, or the like, and a resin such as polyethylene or polypropylene can be used.

  As shown in FIG. 1, the disc-shaped top plate portion 10 constituting the top of the hinge lid 1 has a hinge portion 2 that linearly crosses the top plate portion 10 with a length equal to or less than the diameter of the top plate portion 10. Is provided. With the hinge 2 as a boundary, an opening / closing part 11 is formed on the left side in FIG. 1 and a fixing part 12 is formed on the right side in FIG. 1. In the first embodiment, the area of the fixing part 12 is smaller than the area of the opening / closing part 11. ing. Both the opening / closing part 11 and the fixing part 12 are detachably fixed to the opening end of the container (see FIG. 8), but the fixing part 12 is relatively firmly fixed, whereas the opening / closing part 11 has a thin wall. The hinge part 2 is configured to be rotatable about the rotation axis, and the opening / closing part 11 opens and closes the container opening (most part of the container opening) to which the hinge lid 1 is fixed ( (See FIG. 9).

  As shown in FIG. 2, a trapezoidal cutout portion 25 provided at the lower end of the side wall portion 20 hanging from the peripheral edge of the top plate portion 10 is located at a position shifted from the hinge portion 2 toward the fixed portion 12. A side wall separation portion 20 a extending in the vertical direction from the upper end of the side wall and reaching the upper end of the side wall portion 20 is provided. In the first embodiment, the side wall separation portion 20 a is formed as a weakened portion that is thinner than the surrounding side wall portion 20. When the opening / closing part 11 is first opened (when the end of the opening / closing part 11 opposite to the hinge part 2 is lifted), the side wall separation part 20a is configured to break. Further, the side wall separating portion 20 a is formed at a position shifted from the hinge portion 2 toward the fixed portion 12 until reaching the uppermost end of the side wall portion 20.

  FIG. 3 is a bottom view of the hinge lid 1 of the first embodiment. As shown in FIG. 8, an inner wall portion 13 is provided at a predetermined interval inside the side wall portion 20, and the opening end portion of the container is sandwiched between the inner wall portion 20 and a locking claw 23 provided inside the side wall portion 20. The hinge lid 1 is fitted into the container. Locking claws 23 are provided at five locations on the opening / closing part 11 side, and the opening / closing part 11 is locked to the container opening end when the opening / closing part 11 is closed. On the fixed part 12 side, a locking claw 24 is provided over substantially the entire circumference of the arc of the fixed part 12 that engages with the container opening end, so that the fixing part 12 is not easily detached from the container opening end. Has been.

  4 is a cross-sectional view taken along line AA in FIG. The hinge portion 2 is formed as a thin portion in which the top plate portion 10 is thinner than the fixed portion 12 and the opening / closing portion 11. That is, the fixing portion 12 and the opening / closing portion 11 in the vicinity of the hinge portion 2 are gradually thinned from the upper surface to the lower surface of the top plate portion 10 as the hinge portion 2 is approached. The lower surface side is formed as a flat surface having no step.

  FIG. 5 shows an enlarged view of a region including the top plate separation part 10a and the side wall separation part 20a at one end of the hinge part 2. FIG. The top plate separating portion 10a is formed as a weakened portion having substantially the same thickness as the hinge portion 2, and is configured to be broken and separated when the hinge lid 1 is first opened.

  FIG. 6 shows a partially enlarged side view of the hinge portion 2. In the first embodiment, the top plate separating part 10a is configured as a thin part having the same thickness as the hinge part 2 as shown by a broken line, and when the hinge lid 1 is fitted to the container opening end part, It is provided so that the area | region located immediately above a part may be included. The side wall separator 20a indicated by the solid line in FIG. 6 and the top plate separator 10a indicated by the broken line are connected at a position where the solid line and the broken line intersect in the figure, and the opening / closing part is opened first. Sometimes it breaks and separates through this connected part. An engaging portion is formed by the side wall separating portion 20a and the top plate separating portion 10a thus configured.

  As shown in FIG. 2, the engaging portion is formed as a portion having an end portion shifted from the hinge portion 2 to the fixing portion 12 side in the side wall portion 20 separated into the opening / closing portion 11 side and the fixing portion 12 side. . The engaging part includes an engaging side part 22 that engages with the container opening end when the opening / closing part 11 is opened, and a non-engaging side part that extends below the engaging side part 22 toward the opening / closing part 11 side. 21. The engaging side portion 22 is located at a position shifted from the hinge portion 2 toward the fixed portion 12 side. In the first embodiment, the engaging side portion 22 is formed with a predetermined length perpendicularly from the upper end portion. Yes.

  FIG. 6 shows an inclined portion provided on the non-engaging side. A non-engaging side portion 21 having an inclined portion provided as a linear portion inclined toward the opening / closing portion 11 side is formed below the engaging side portion 22 (in other words, below the engaging side portion 22. The side wall portion 20 is provided with a trapezoidal cutout portion 25). The non-engaging side portion 21 is for preventing the engaging portion from being caught by the container opening end when the opening / closing portion 11 is closed.

  FIG. 7 shows an enlarged view of a bottom view of a region in the vicinity of the side wall separation portion 20a. In the first embodiment, the hinge lid 1 is provided with the inner wall portion 13 at a predetermined interval from the side wall portion 20, and thus the inner wall separation portion 13 a is provided so as to separate the inner wall portion 13. The inner wall separating portion 13a is also formed as a weakened portion that is thinned, and is configured to be broken and separated when the hinge lid 1 is first opened.

  Next, actions based on the above configuration will be listed and described.

  (a1) The side wall part 20 is provided with a side wall separation part 20a at a position shifted from the hinge part 2 toward the fixed part 12 side. The side wall separation portion 20 a is formed as a weakened portion that is thinner than the surrounding side wall portion 20. And when opening the opening-and-closing part 11 for the first time, the side wall isolation | separation part 20a is comprised so that it may fracture | rupture.

  By configuring in this way, the user can identify whether the hinge lid 1 has not been opened or has already been opened, so whether or not someone has opened the lid at the distribution stage. And a function to prevent mischief (a pilfer proof function) can be imparted to the hinge lid 1.

  (a2) The side wall separation portion 20a is formed at a position shifted from the hinge portion 2 toward the fixed portion 12 even at the uppermost end of the side wall portion 20. By being formed in this way, it is possible to maintain the strength of the engaging portion, prevent the engaging portion from falling into the inside of the container opening end portion and catching the opening and closing portion, and the opening and closing portion 11 being opened. Can be maintained stably.

  That is, as shown in FIG. 11, when the top plate separation part is not provided and the uppermost end of the engagement part coincides with the thin part of the hinge part, the upper part of the engagement part is cut off. As a result, the strength of the engaging portion is lowered accordingly. Then, since the engaging portion has an arcuate shape, the amount of deformation that deforms so as to bend inward while maintaining the open state is relatively large. Therefore, when the opening / closing part is to be closed, the engaging part is easily caught by the container opening end. In addition, as in the first embodiment, a shape in which a part of the lower side of the engaging side part 22 is cut off (the lower part of the engaging side part 22 is cut out as a notch part 25) to the engaging part. When the non-engagement side portion 21 is provided, if the upper portion of the engagement portion is cut off as in the conventional example shown in FIG. The engagement part may be deformed inside or outside the container due to the force of the opened opening / closing part to close due to elasticity, and the engagement may be disengaged, so that the opening / closing part can be stably maintained. Disappear.

  On the other hand, in the first embodiment, the top plate separating portion 10a and the side wall separating portion 20a are provided. Therefore, when the opening / closing portion 11 is first lifted, the upper end of the side wall portion 20 extends from the hinge portion 2 to the fixing portion 12. It is separated at a position shifted to the side, and the engaging portion is provided up to the position of the upper end of the side wall portion 20, so that the strength of the engaging portion can be maintained moderately, and the opening / closing portion 11 can be maintained in an open state, In addition, it is difficult for the engaging portion to fall into the inside of the container opening end, and it is prevented that the engaging portion is caught and the opening / closing portion is not closed.

  Here, in the side wall part 20, when the distance from the position of the hinge part 2 to the position where the side wall separation part 20 a is provided is increased, the distance that the engaging part protrudes toward the fixing part 12 side increases, so the opening / closing part 11 is opened. Sometimes, the opening angle of the opening / closing part 11 increases until the end of the engaging part engages with the opening end. Therefore, as the distance from the position of the hinge part 2 to the side wall separating part 20a is increased, the opening / closing part can be maintained in the open state with the angle being greatly opened. Since the part 22 enters the inside of the container too much and does not engage with the container opening end part, the position of the hinge part 2, the thickness of the side wall part 20, the height and the shape of the engaging side part 22, the diameter of the container opening end part The angle can be determined appropriately in consideration of the angle at which the opening / closing portion 11 is kept open.

  (a3) The top plate separating part 10a is configured as a thin part. Thereby, since the user can identify whether the hinge lid 1 has not been opened yet or has been opened, it is possible to know whether or not someone has opened the lid at the distribution stage. The tamper-proof function (pill fur proof function) can be imparted to the hinge lid 1.

  (a4) The non-engaging side portion 21 is provided. As a result, the conventional hinge lid as shown in FIG. 11 does not have a portion that falls down inside the container opening end, so that when the hinge lid is closed, the side wall portion is caught and the lid cannot be closed.

  In addition, the height (height of the notch part 25) H from the lower end of the side wall part 20 to the upper end of the non-engagement side part 21 is a grade which is not caught by the container opening end part when the opened hinge lid 1 is closed. The height can be set. Preferably, when the opening / closing part 11 is opened and the engagement side part 22 is locked to the container opening end, the proportion of the end part of the engagement side part 22 that exists in the non-contact region shown in FIG. Set to be as small as possible. More preferably, the end of the engagement side portion 22 is set so as not to exist in the non-contact area shown in FIG. By setting in this way, it is possible to reliably prevent the engagement side portion 22 from being caught by the container opening end portion and the lid from being closed, and the engagement side portion 22 does not protrude to the inside of the container opening end portion. Therefore, the resistance when closing the opening / closing part 11 can be reduced, and the lid can be more easily closed.

  (a5) The inclined portion 21 a is provided on the non-engaging side portion 21. In this case, as shown in FIG. 9, when the opening / closing portion 11 is turned and started to close, the engagement side portion 22 elastically deforms toward the outside of the container opening end portion. When the engagement is released from the container opening end and the opening / closing part 11 is further closed, the non-engagement side part 21 is inclined, so that the non-engagement side part 21 connected to the engagement side part 22 is inclined. While the inclined portion 21a is in contact with the container opening end, the side wall portion 20 of the hinge lid 1 is sequentially deformed to the outside of the container. Therefore, while preventing the engaging portion or the side wall portion 20 of the hinge lid 1 from being caught by the container opening end portion, the resistance when closing the opening / closing portion is further reduced, and the hinge lid 1 can be smoothly closed. Play.

  In this way, by configuring the non-engaging side portion 21 to be inclined, when the hinge lid 1 is closed, the non-engaging side portion 21 comes into contact with the container opening end and the side wall portion is deformed to the outside of the container. Thus, the resistance when the opening / closing part 11 is closed can be reduced and the opening / closing part 11 can be closed smoothly. Although the inclination angle of the non-engaging side portion 21 can be determined as appropriate, the angle α formed by the non-engaging side portion 21 with the horizontal direction is preferably 80 ° or less. By setting the angle within this range, resistance due to contact between the non-engagement side portion 21 and the container opening end when the hinge lid 1 is closed can be reduced, and the side wall portion 20 can be preferably turned outward. The effect of preventing the container from being caught on the opening end of the container can be obtained.

  When the angle exceeds 80 °, the inclined portion 21a of the non-engaging side portion 21 and the container opening end come into contact with each other in a state of being almost parallel when the opening / closing portion 11 starts to be closed after the hinge lid 1 is opened. This is not preferable because the resistance becomes too large and it is difficult to close the lid.

  (a6) The hinge portion 2 is configured such that the lower surface side is a connecting portion and the upper surface side is a linear concave groove portion (V-shaped groove portion). Thereby, when the opening / closing part 11 is opened, the hinge part 2 is bent, and as shown in FIG. 9, a rounded bent part is formed depending on the thickness of the hinge part 2, so that the bent part is in a sharp state. There is no possibility of feeling pain even if the user's finger or the like touches the bent portion. In addition, since the bent portion is formed in a straight line shape, when the content is powder or the like, it can be used as a scraping portion when the content is scraped off with a spoon and the content is scraped off.

  (a7) The top plate separating portion 10a is configured as a thin portion having a thickness smaller than the thickness of the top plate portion as shown by a broken line, and when the hinge lid 1 is attached to the container opening end portion, The region is provided so as to include a region located immediately above the opening end. With this configuration, when the end portion of the opening / closing portion 11 located on the side away from the hinge portion 2 is first lifted upward, the side wall portion 20 is separated with the outer periphery of the container opening end portion as a boundary. Therefore, when the opening / closing part 11 is rotated, the engaging part can smoothly open and close without being caught by the container opening end. When the end of the opening / closing part 11 is first lifted, the side wall separating part 20a is also broken at the same time to form an engaging part. As shown in FIG. 6, since the top plate separating portion 10a and the side wall separating portion 20a are provided so as to be connected at the intersecting positions, the side wall portion becomes the top plate portion and the fixing portion when they are broken. An engagement portion that is separated from the side wall portion and includes the upper end of the side wall portion is formed. A broken line in FIG. 5 indicates the position of the engaging side portion 22 when the opening / closing portion 11 is opened to a substantially vertical state. Since the engaging side portion 22 is located at the inner side of the container by a distance L than the position of the thin portion of the hinge portion 2, when the opening / closing portion 11 is opened, the engaging side portion 22 is engaged with the container opening end portion. The state where the opening / closing part 11 is opened can be maintained.

  The best mode for carrying out the present invention has been described above with reference to the first embodiment. However, the present invention is not limited to this embodiment, and various modifications can be made without departing from the technical scope of the present invention. Is possible. For example, the hinge unit 2 is not particularly limited in its configuration as long as it has a function as a hinge that allows the opening / closing unit to turn when the opening / closing unit is opened and closed. The upper surface side may be a connecting portion, and the lower surface side may be configured to be a linear groove portion (reverse V-shaped groove portion in cross section). In addition, a configuration in which a perforated weakened portion is provided without providing a concave groove portion, a configuration in which a cut is provided on the lower surface side, or a hinge portion can be configured by a hinge.

  In addition to the configuration described in (a2) of the first embodiment, the side wall separation portion 20a may be provided in a separated state in advance. Further, in the first embodiment, the side wall separating portion 20a is provided vertically. However, as long as the side wall portion 20 is configured to be separated at a position shifted to the fixed portion 12 side from the hinge portion 2, the shape thereof is provided. Is not particularly limited, and may be formed in, for example, an inclined shape or a step shape. When configured to be inclined, by setting the angle of the side wall separating portion 20a according to the opening angle of the opening / closing portion 11 maintained in the open state, the engagement side portion 22 and the container opening end portion are in parallel contact with each other. It can comprise so that it may engage in a state, and can maintain the state which the lid | cover opened stably.

  The top plate separating portion 10a may be formed in a state where the top plate portion 10 and the engaging portion are separated in advance in addition to the configuration described in (a4) of the first embodiment. Moreover, although the side wall separation portion and the top plate separation portion are configured as thin portions, they may be formed as perforated weakening portions.

  In the first embodiment, the engagement side portion 22 is formed vertically with a predetermined length from the upper end portion. However, it is not always necessary to form the engagement side portion 22 vertically, depending on the position of the hinge portion 2, the opening angle of the opening / closing portion 11, and the like. It is good also as appropriate shapes, such as inclined shape.

  The non-engaging side portion 21 does not need to be configured in an inclined shape as described in (a6) of the first embodiment, and the lower portion of the engaging side portion 22 is closer to the opening / closing portion 11 side than the engaging side portion 22. For example, the shape may be a curved shape or a step shape.

2 is a plan view of a synthetic resin hinge lid of Example 1. FIG. It is a side view of the synthetic resin hinge lid of Example 1. It is a bottom view of the synthetic resin hinge lid of Example 1. It is sectional drawing in the AA of FIG. FIG. 3 is a partially enlarged plan view of a region including a top plate separating unit and a side wall separating unit according to the first embodiment. It is the partially expanded side view which expanded the area | region containing the side wall isolation | separation part of Example 1, and a non-engagement side part. It is the partially expanded bottom view which expanded the area | region containing the side wall isolation | separation part of Example 1, and a non-engagement side part. It is a perspective view which shows the state which mounted | wore the container with the hinge lid | cover of Example 1. FIG. It is a perspective view which shows the state which opened the hinge lid | cover of Example 1. FIG. It is a top view which shows typically the positional relationship of the engaging part (side wall part) and container opening end part at the time of opening the opening-and-closing part in a prior art example seen from the top-plate part side. It is a side view which shows the engaging part of the hinge lid in a prior art example. It is a perspective view which shows the state which opened the hinge cover of the prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hinge cover 2 Hinge part 10 Top plate part 10a Top plate separation part 11 Opening / closing part 12 Fixing part 13 Inner wall part 13a Inner wall separation part 20 Side wall part 20a Side wall separation part 21 Non-engagement side part 21a Inclination part 22 Engagement side part 23 Locking claw 24 Locking claw

Claims (3)

The top plate portion, the hinge portion provided on the top plate portion, the side wall portion hanging from the periphery of the top plate portion, and the opening end portion of the container provided on the inner surface side of the side wall portion are engaged. A synthetic resin hinge lid having a locking portion for
The top plate portion is bounded by the hinge portion, one is a fixed portion that is always fixed to the opening of the container, and the other is fixed to the opening of the container when the container is closed. An opening and closing part that opens the opening of the container by performing an opening operation of lifting the hinge as a rotation axis when the opening of the container is opened.
The side wall portion, by opening operating the closing unit, is separated into the fixed portion side and the opening portion side in a position shifted to the fixed portion side of the hinge portion to the upper end of the front Symbol sidewall portion A sidewall separator is provided,
When the synthetic resin hinge lid is attached to the opening end of the container between the side wall separation part and the hinge part by opening the opening / closing part on the top plate part, the container opening is opened. top plate separating portion for separating the top plate portion and the side wall portion of the region located immediately above the end portion comprising at least a is provided,
By providing the side wall separation part and the top plate separation part in a connected manner, when the opening / closing part is opened, the upper end of the side wall part is separated at a position shifted from the hinge part to the fixed part side. And a synthetic resin hinge lid , wherein an engagement portion is formed to be engageable with the container opening end. In the synthetic resin hinge lid according to claim 1,
At the end of the engagement portion, an engagement side portion that engages with the container opening end when the opening / closing portion is kept open has a predetermined length from the upper end of the end of the engagement portion. The non-engagement side that does not engage with the container opening end when the engagement side engages with the container opening end extends below the engagement side toward the opening / closing part. A hinge cover made of synthetic resin, characterized in that it is formed. The synthetic resin hinge lid according to claim 2,
The non-engagement side part includes a slant part extending at a part below the engagement side part and inclined toward the opening / closing part side.

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