JP2007126174A - Cup lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid for a spouted cup capable of improving a sealability of the lid of the spouted cup with the capability of performing an optional turning in a stack to cut out the lid and being appliable to an automatic vending machine. <P>SOLUTION: This lid has an annular protrusion 3 formed in an endless manner at the outer periphery of a panel surface 2 covering the central surface of a cup opening part and having a drinking port at its top part, a curled fitting groove 7 arranged outside of the annular protrusion through an annular groove 4, and a flange-like lid cutting out engagement part 6 protruded and formed below outside of the curled fitting groove. A plurality of blocking preventive ribs 20 are formed circumferentially at any of the inner peripheral wall or outer peripheral wall of the annular protrusion 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention can be applied to a synthetic resin cup lid that is applied to a wide-mouth container such as a paper cup, and more particularly to a lid mounting device that automatically mounts a lid after pouring a beverage into a cup in a vending machine or the like. Concerning the cup lid.

  Conventionally, in fast food stores, etc., it is also provided for customers to take out drinks such as coffee and drinks inside the store, or to cover customers with the lid so that the contents are not spilled while moving. is doing. At that time, the lid is covered directly by hand or by using a dedicated lid mounting machine. On the other hand, in a vending machine of a type that pours and provides beverages to a cup, the cup after the beverage has been dispensed has not been provided with a lid so far. An automatic lid mounting device in a vending machine (see Patent Documents 1 and 2) that can automatically mount a lid after dispensing a drink to a cup in a vending machine, and a cup lid applicable thereto (Patent Document) 3).

In order to enable the vending machine to automatically cover the cup with the lid, from the viewpoint of the lid, in particular, (1) the lid can be surely cut out automatically in the vending machine; (2) The lid has a centering function so that it can be securely fitted even if the center position of the container and the lid is slightly shifted. (3) In the vending machine, the lid is fitted. Since it is structurally difficult to provide a large pressing device, there is a problem to be solved, such as a lid with a structure that can be reliably sealed with a small pressing force, and the proposed cup lid has solved these problems It was a thing. That is, for the problem of (1), by providing a flange-shaped lid cutout engaging portion at the outer position of the fitting portion, and by providing a stacked rib portion protruding upward on the panel surface of the lid, The stacked lids are prevented from deeply fitting and becoming difficult to separate, and for the problem (2), the centering function is achieved by forming both walls below the curl fitting groove into a large taper shape. For the problem of (3), a weak fitting is achieved by bringing the upper surface of the curled portion fitting groove into contact with the curled portion of the cup to increase the sealing force and reducing the undercut at the fitting groove entrance. These problems were solved by enabling fitting with a combined pressure. On the other hand, the lid mounting device of the vending machine described in Patent Document 1 is to mount the lid by sliding the lid over the cup and pressing the upper side of the curl fitting groove of the lid with a pressing jig (hereinafter referred to as “the lid mounting device”). This type of lid mounting device was called a plug-type mounting device). On the other hand, the lid mounting device of the vending machine described in Patent Document 2 has lid holding means for holding the lid on the cup by the elasticity of the lid pressing spring and a roller for pressing the peripheral edge of the lid from above. The roller is attached to the cup by pressing it while rotating along the peripheral edge of the lid held on the cup (hereinafter, this type of lid mounting device is referred to as a roller-type mounting device). It was. In this device, when the lid is attached, the lid pressing coil spring rotates and abuts against the panel center surface of the lid so that the lid is aligned with the axial center of the coil spring, that is, the center of the cup opening. It was possible to perform stable mounting even when the lid was placed in a slightly deviated state on the cup opening, and had the advantage that the lid could be sealed with a weak pressing force. .
JP 2002-150419 A JP 2004-240654 A JP 2002-284206 A

  In recent years, in the case of beverages such as coffee that are dispensed to a cup at a store, lids with a mouthpiece have been frequently used as lids that are attached to the dispensed cups, and are provided by vending machines. Application of a lid with a mouthpiece is also required as a lid for cup drinks. In the case of a lid with a spout, in order to form a spout on the inside of the curl fitting groove, in many cases, an upper end surface is formed with an annular protrusion having a predetermined width, and the upper end surface of the annular protrusion has a spout. Is open. In order to make it easy to drink, it is desirable that the annular ridge portion in which the drinking mouth is formed is high enough to be able to be held deeply by both lips. On the other hand, when drinking a drink from such a cup with a lid, the container is inevitably tilted. Therefore, in such a state, a sealing property is required such that no leakage occurs from the fitting portion between the cup and the lid. In order to seal the curl portion and the curl fitting groove of the lid, it is desirable to completely wrap the curl portion of the cup as described in Patent Document 3. For that purpose, it is effective to provide an undercut part at the curl part fitting groove inlet part, and more particularly when applied to a vending machine, in order to enhance the centering function when the lid is attached to the lower part, It is desirable to provide a tapered fitting groove introducing portion. When these conditions are satisfied and the annular ridge is formed to a height that satisfies the above requirements, a conventional lid with a conventional drinking mouth is inevitably formed between the curl fitting groove and the annular ridge. Compared to this, a deep groove must be formed.

  On the other hand, these lids are usually made of plastic by pressure forming, but further reduction in thickness is required from the viewpoint of resource saving and low cost. When a lid having a deep groove between the curl fitting groove and the annular ridge portion is pressure-air molded, the thickness of the deep groove portion becomes thinner than other portions and the strength becomes weaker. This becomes more remarkable as the material used for the lid is reduced. As a result, problems such as breakage and deformation of the groove bottom and side wall occur. Particularly in the case of a vending machine, there is a possibility that the centering function is impaired when the curled portion of the container hits the portion. Similarly, since the annular ridge portion is formed high, the side wall is also thinner than the other portions, and the strength is significantly reduced as the amount of material used in the lid is reduced. This is an impediment to material reduction. In addition, in the case of a lid with a mouthpiece, the portion having the mouthpiece is higher than the other portions, so it has directionality, but can be stacked at equal intervals in any direction, and when the lid is cut out, It must be stacked so that it can rotate freely.

  Therefore, the present invention can improve the sealing property of the cup lid with a drinking mouth and the applicability to a vending machine, and can form the annular ridge portion on which the drinking mouth is formed to a sufficient height. An object of the present invention is to provide a cup lid that can be thinned by improving the strength of the annular groove portion and the annular ridge portion formed for that purpose, and that can be arbitrarily rotated in a stacked state and can be cut out satisfactorily. It is what.

  The cup lid according to claim 1 of the present invention for solving the above-mentioned problems is a lid with a drinking mouth formed of a synthetic resin to be attached to a cup having a curled portion at the top of the opening, and covers the center surface of the cup opening. And an annular ridge that is formed endlessly on the outer peripheral portion of the panel surface and has a drinking mouth on the top, and is formed to endlessly protrude through an annular groove on the outside of the annular ridge. A curl portion fitting groove having an arcuate cross section; and a flange-like lid cut-out engaging portion that protrudes outwardly at an outer position below the curl portion fitting groove; A plurality of anti-blocking ribs are formed in the circumferential direction on either the inner peripheral wall or the outer peripheral wall of the portion.

  According to a second aspect of the present invention, in the cup lid of the first aspect, the anti-blocking rib is formed to protrude from the inner peripheral wall of the annular ridge, and the top surface thereof is positioned at a predetermined height from the panel surface. Is formed. Further, the invention of claim 3 is the cup lid according to claim 1, wherein the anti-blocking rib is formed to be recessed in the outer peripheral wall of the annular ridge, and its bottom surface has a predetermined depth from the top of the outer peripheral wall. It is formed so that it may be located. According to a fourth aspect of the present invention, in the cup lid according to the first, second, or third aspect, a plurality of the anti-blocking ribs are formed on the same circumference, and the top and bottom are stacked in a state where the cup lids are stacked. The anti-blocking ribs are formed so as to be offset from each other in the circumferential direction with respect to the anti-blocking ribs of the lid positioned above and below.

  Further, according to a fifth aspect of the present invention, in the cup lid according to any one of the first to fourth aspects, the curled portion fitting groove is formed with a width narrower than a maximum width of the curled portion fitting groove. A fitting groove introducing portion having a portion fitting groove inlet and extending downwardly from the curled portion fitting groove inlet is formed, and the fitting groove introducing portion includes an outer wall of the annular groove. It is formed by the inner taper surface which comprises and the outer taper surface which reaches the said lid cutting engagement part. The invention of claim 6 is the cup lid according to any one of claims 1 to 4, wherein a plurality of reinforcing ribs are provided at the bottom of the annular groove provided between the annular protrusion and the fitting portion. It is provided at a predetermined interval. Further, the invention according to claim 7 is the curled part according to any one of claims 1 to 4, wherein the curled part fitting groove is formed to have a width narrower than a maximum width of the curled part fitting groove. A fitting groove introducing portion having a fitting groove inlet and having a taper shape extending downward from the curled portion fitting groove inlet is formed, and the fitting groove introducing portion reaches the lid cutout engaging portion. It is formed only by the outer tapered surface, and the annular groove is formed shallowly. Furthermore, the invention of claim 8 is the cup lid according to any one of claims 1 to 7, wherein the cup lid has an average thickness of 0.2 to 0.7 mm for a plug-type mounting device, The roller type mounting device is molded so as to be in the range of 0.1 to 0.3 mm.

  The cup lid of the present invention according to any one of claims 1 to 8 is provided with a flange-shaped lid cut-out engaging portion at an outer position of the fitting portion, and an antiblocking rib on either the inner peripheral wall or the outer peripheral wall of the annular protrusion. Thus, the interval between the lid cutout engaging portions is reliably kept constant, blocking is prevented, the separation by the drop ring can be ensured, and the lid can be reliably cut out by the vending machine. Moreover, since the anti-blocking rib is provided on the inner peripheral wall or the outer peripheral wall of the annular protrusion, it has the effect of reinforcing the annular wall formed high to form the drinking mouth, and promotes the thinning of the lid material. The panel can be flattened, making it possible to apply a roller-type mounting device, making the centering of the lid and cup easier, and no need for direction for stacking the lid, and when the lid is cut out by rotating the drop ring It can be rotated freely, and the lid can be reliably cut out with little resistance.

  According to the invention of claim 2 and claim 3, in addition to the above effect, the lower lid can accurately hold the upper lid at the height of the anti-blocking rib in the stacked state, and the rib Therefore, the inner peripheral wall or the outer peripheral wall of the annular ridge portion can be freely supported as a guide. According to the invention of claim 4, the blocking ribs do not fit in the stacked state, and the interval can be reliably maintained. According to the inventions of claims 5 and 7, the lid can be attached so as to wrap the curled portion of the cup with the curled portion fitting groove, and leakage from the fitting portion can be prevented even if the cup is inclined by 90 ° or more, In addition, the centering function is achieved by the fitting groove introducing portion when the lid is mounted, and the lid can be reliably fitted. According to the invention of claim 6, since the reinforcing rib is further provided at the bottom of the annular groove, the strength can be maintained even if the annular groove is formed deeply, the material can be thinned, and the inner taper can be achieved. It becomes possible to form the surface and the annular ridge portion high. According to the configuration of the eighth aspect, the familiarity between the curl fitting groove of the lid and the curl part of the cup is good and the surface contact is increased, so that the sealing performance can be further improved.

Hereinafter, embodiments of the present invention will be described in detail.
1 to 6 show a cup lid according to the first embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a partially sectional front view, FIG. 3 is an enlarged AA sectional view, FIG. FIG. 5 is an enlarged sectional view of a main part in a stacked state, and FIG. 6 is a partially sectional front view in a state of being attached to a cup. A cup lid (hereinafter simply referred to as a lid) 1 according to the present embodiment is formed by pressure compression molding with plastic, and its main configuration is a panel surface 2 covering the central portion of the cup opening and an endless projection on the outer periphery of the panel surface. The formed annular ridge 3, the fitting portion 5 provided on the outside of the annular ridge through the annular groove 4, and the lid cutout formed in a flange shape on the lower outer periphery of the fitting portion 5 The engaging portion 6 is included.

  As shown in FIGS. 3, 4 and 6B, the fitting portion 5 has a curl whose cross section is formed in a substantially arc shape so that the curl portion 27 of the cup 26 is fitted and adhered to the top portion. And the curl portion fitting groove 7 has a maximum inner diameter substantially equal to the maximum curled portion outer diameter of the cup, and the diameter of the inlet outer edge 8 of the curl portion fitting groove 7 is the curl portion. The maximum inner diameter of the fitting groove 7 is 0.2 to 0.4 mm (0.3 mm in this embodiment). That is, the inlet outer edge 8 of the curl fitting groove 7 is located 0.1 to 0.2 mm (approximately 0.15 mm in this embodiment) inside the outermost position of the curl fitting groove. . A protrusion projecting inwardly from the inlet outer edge 8 at a predetermined interval along the circumferential direction below the inlet outer edge 8 to approximately 0.25 to 0.15 mm (0.2 mm in this embodiment). A strip 9 (undercut portion) is formed, and the upper end of the convex strip 9 is engaged with the lower surface of the curl portion of the cup.

  That is, the protruding surface 10 of the ridge portion 9 is a circumferential surface having a diameter smaller by 0.3 to 0.5 mm (0.4 mm in this embodiment) than the diameter D2 of the inlet outer edge 8 of the curl fitting groove 7. In this embodiment, it is located 0.35 mm inward from the curled portion maximum outer diameter portion. Therefore, when the curled portion of the cup is fitted into the curled portion fitting groove 7, the curled portion fitting groove is pressed from above to reduce the width of the curled portion fitting groove inlet, particularly below the inlet outer edge 8. The protruding surface 10 of the hanging wall portion 11 that is positioned is pushed outward by a predetermined distance (0.35 mm in this embodiment) and the curled portion enters, and after fitting, the curled portion returns due to the elasticity of the lid, The upper surface of the ridge portion engages with the lower surface of the curl portion of the cup, and as shown in an enlarged view in FIG. 6B, the inner peripheral surface of the curl portion fitting groove 7 is in close contact with the outer peripheral surface of the lid curl portion. This increases the contact area between the curled portion and the curled portion fitting groove, thereby improving the sealing function. Further, the ridge portion 9 functions as a reinforcing rib, increases the rigidity of the hanging wall portion 11, prevents the curl fitting groove 7 from being inadvertently expanded while maintaining the initial shape, and the upper surface of the ridge portion 9. Engages the lower part of the curl portion of the cup and provides resistance to the lid coming off. Accordingly, the curled portion of the lid and the cup can be kept in close contact with each other, and a sealed state in which the beverage does not leak even when the cup is tilted by 90 ° can be maintained.

  The sealing performance also depends on the thickness of the lid. When the cup is made of paper, it is difficult to form the curled portion into a uniform and smooth shape over the entire circumference. In order to maintain hermeticity even if it is non-uniform, it is desirable that the fitting groove of the lid adheres in conformity with the shape of the curled portion, and for that purpose, it is desirable that the lid material is thinner. However, if it is too thin, the fitting force is weakened and the sealing performance cannot be maintained. As a result of various experiments on the appropriate plate thickness to maintain the sealing performance, the inventor of the present invention differs depending on the caliber of the cup, but in the case of a drinking cup sold in a normal vending machine, It was found that the lid thickness in the case of mounting is appropriate in the range of 0.2 to 0.7 mm, and the range of 0.1 to 0.3 mm is appropriate in the case of mounting with the roller type mounting device. It has been confirmed that when the plate thickness exceeds the above range, there is a slight difficulty in fitting with the cup, and leakage may occur when tilted by 90 °.

The lower part of the curled part fitting groove inlet is expanded into a downwardly expanding shape to form a fitting groove introducing part 12. The inner wall of the fitting groove introducing portion 12 also serves as the outer wall of the annular groove 4 and is inclined in a taper shape at a gentle angle to form an inner tapered surface 13, and the centering function of the lid when the lid is attached to the cup It is formed to extend deeper downward than this type of conventional lid with a drinking mouth. Therefore, a deep annular groove 4 is formed of a depth h ₁ between the annular ridge part 3 forming a spout to be described later. On the other hand, the outer wall of the fitting groove introducing portion 12 has a hanging wall portion 11 having a protruding strip portion 9 extending vertically downward from the lower end of the inlet outer edge 8 by a predetermined distance (2.1 mm in this embodiment). And has an outer taper surface 15 whose lower end is inclined outward and expands in a taper shape. The lower end of the lower taper extends further outward to form the lid cut-out engaging portion 6.

  Accordingly, the lid 1 of the present embodiment has a tapered surface in which the fitting groove introducing portion 12 expands inward and outward and the lower end of the fitting groove introducing portion is wide, so that the beverage is filled with the vending machine. When the cup rises and fits into the lid, even if the axis of the lid and the cup is slightly deviated, the curl portion of the cup comes into contact with the inner tapered surface 13 or the outer tapered surface 15 and the lid rises as the cup rises. Gradually moves toward the center and can be reliably fitted. That is, the lid of the present invention has a centering function due to the above structure. In addition, since it has the lid cutout engaging portion 6, in a state of being stacked on the stacker, a blocking prevention rib as described later creates a gap that allows a lid cutout means such as a known drop ring to be inserted between the flanges, The lid can be cut out well.

In the lid according to this embodiment, the deep annular groove 4 is formed between the annular ridge 3 and the fitting part 5 for the above reasons. Therefore, when the lid is formed by pressure forming, the bottom of the annular groove 4 is particularly small. The part of the wall 17 becomes thin, and the fault which becomes easy to fracture | rupture or deform | transforms arises. The disadvantage is eliminated by forming a plurality of concave reinforcing ribs 18 at a predetermined interval at the bottom of the annular groove 4, thereby making it possible to form a deep annular groove. The annular ridge portion 3 is formed between the panel surface 2 and the curl fitting portion 5 via the annular groove 4 and has a substantially square cross section as shown in the drawing, and a lip having a drinking mouth 16 formed therein. The portion 18 that hits is formed so as to be higher than the other portion 19 in order to make it easy to drink. The portion 18 where the lip of the annular ridge 3 hits is formed at a height h _{2 of about} 8 to 12 mm from the panel surface, and the other low portion 19 is a height h _{3 of about} 4 to 6 mm from the panel surface (see FIG. 2). ). The annular ridge 3 may be formed at the same height as the portion where the lips hit the entire annular ridge 3, but the other portions are formed low in order to save material and maintain strength.

  In the present invention, by utilizing the fact that the annular ridge 3 is formed at a predetermined height, the lid is cut out one by one from the state where the lid is stacked on the inner peripheral wall 21 of the annular ridge. The anti-blocking rib 20 is formed in order to prevent the lids from being deeply fitted into each other and causing a cutting failure, that is, a so-called blocking phenomenon. As shown in FIG. 4, a plurality of the anti-blocking ribs 20 are formed by bulging the inner peripheral wall 21 of the annular ridge 3 at a predetermined interval into a square shape with a width i and a height j toward the center of the lid. Has been. When the lids are stacked, as shown in FIG. 5, the anti-blocking rib 20 fits deeper when the peripheral portion of the panel surface 2 of the lid stacked thereon is supported by the top surface 22. In addition to preventing blocking, the gap t between the lid cutout engaging portions 6 serves to form a gap in which the drop ring can be fitted. Therefore, in the state where the cup lids are stacked, the anti-blocking ribs 20 are displaced from each other in the circumferential direction so that the anti-blocking ribs 20 of the stacked lids are not fitted between the upper and lower anti-blocking ribs. Is formed. In this embodiment, the anti-blocking ribs 20 are divided into a plurality of groups (for example, 7 groups) and manufactured by shifting the positions, and by alternately stacking them one by one, as shown in FIG. The top surface 22 of the rib 20 is prevented from fitting into the anti-blocking rib 20 of the lid thereon. The dimension of the anti-blocking rib 20 can be appropriately selected depending on the size of the lid, and the dimension is not particularly limited. In FIG. 5, for the sake of clarity, the anti-blocking rib 20 is formed on the inner peripheral wall surface of the portion where the annular protrusion has the drinking mouth. It is desirable not to form on the inner peripheral wall surface of the part where the mouth is located.

  Since the anti-blocking rib 20 is formed on the inner peripheral wall 21 of the annular ridge 3, it also functions as a reinforcing rib of the annular ridge 3 that protrudes high, and the side wall of the annular ridge 3 that tends to be thin is formed. Reinforcement can be achieved and the cover material can be made thinner. Moreover, by providing the blocking prevention rib 20 on the wall surface of the annular protrusion, the panel surface can be flattened, and a roller type lid mounting device can be used as will be described later.

  Since the cup lid 1 of the present embodiment has the above-described configuration, when the lids are stacked, as shown in FIG. 5, the upper arc portion of the curl fitting groove 7 on the outer periphery thereof is the upper lid portion. Since it engages with the lower surface of the ridge portion 9 or the outer tapered surface 15 in the vicinity thereof, the upper and lower lid fitting portions are not fitted to each other, and the interval between the lid cutout engaging portions 6 is set as shown in the figure. Maintain a predetermined distance t that allows the drop ring to engage the lid. In addition, since the inner peripheral wall 21 of the annular ridge portion of the lid is maintained at a predetermined interval by the engagement of the blocking prevention rib 20, the lids do not fit strongly even when pressure is applied to the lid, The lid can be easily cut out from the stacked state by a known drop ring. When the lid is cut out by the drop ring, a slight rotational force is given to the lid by the drop ring. However, the lid of the present invention supports the upper lid with the flat top surface 22 of the annular protrusion while maintaining a predetermined gap. Therefore, even though the annular ridges have different circumferential heights, they have no directionality and can be stacked and rotated freely, and can be cut out satisfactorily without giving resistance to the drop ring.

  In the lid mounting device, when the cup filled with the beverage rises from below with the lid held, and when the curled portion of the cup is fitted into the curled portion fitting groove 7 of the lid, the center of the lid and the cup Even if there is a slight deviation, since the fitting groove introducing portion composed of the inner tapered surface 13 and the outer tapered surface 15 is provided at the inlet portion of the curled portion fitting groove, the centering function automatically works, and the curled portion By pressing the top portion of the fitting groove 7 with a pressing jig, the curled portion 27 of the cup is fitted over the curled portion fitting groove 7 beyond the convex strip portion 9 of the lid, and the cup is sealed. Therefore, in the case of the lid of this embodiment, the lid can be mounted satisfactorily by either the stopper-type mounting device or the roller-type lid mounting device. And since the reinforcing rib 18 is provided in the bottom part of the annular groove 4, the intensity | strength of an annular groove improves and even if it is deep, it does not fracture | rupture or deform | transform easily. Moreover, since the anti-blocking rib 20 is provided on the inner peripheral wall of the annular ridge 3, the strength of the annular ridge is improved, and the annular ridge of the drinking mouth can be formed to a sufficient height. it can.

7 to 8 show a cup lid according to another embodiment of the present invention. The lid 30 of the present embodiment is particularly suitable for performing lid mounting by a roller-type lid mounting device having a coil spring at the center. The same parts as those in the above embodiment are given the same reference numerals, and only the differences will be described.
In the case of a roller-type lid mounting device having a coil spring at the center, when the lid is mounted, the lid pressing coil spring rotates and abuts against the panel center surface of the lid, so that the lid is axially centered on the coil spring, that is, The lid 30 according to the present embodiment performs the so-called centering action so as to match the center of the cup opening, and stable mounting is possible even when the lid is placed in a slightly displaced state on the cup opening. A portion corresponding to the inner tapered surface of the fitting groove introducing portion 31 provided in order to further improve the centering function of the lid is not provided. Therefore, in the lid 30 of this embodiment, the annular groove 32 can be formed shallow, and sufficient strength can be obtained without providing a reinforcing rib at the bottom of the annular groove 32. Other configurations are substantially the same as those of the above-described embodiment, and a plurality of blocking prevention ribs 33 project from the inner peripheral wall 21 of the annular protrusion 3. In the present embodiment, the anti-blocking rib 33 is formed with a lower height from the panel surface and longer in the circumferential direction than that of the above-described embodiment, but any size can be adopted. Further, in the present embodiment, an annular rib 34 that is convex inward is formed on the panel surface 2 for reinforcement.

FIG. 9 shows a state in which the lid 30 configured as described above is mounted with a roller-type lid mounting device in a vending machine.
As shown in Patent Document 2, the roller-type lid mounting device 40 has a lid holding means for holding the lid on the cup 26 by the elasticity of the lid pressing spring 41 made of a coil spring and a predetermined pressing portion of the peripheral edge of the lid from above. And a plurality of rotatable rollers 42 arranged at intervals. When the lid is mounted, the lid pressing spring 41 rotates and abuts against the panel central surface of the lid 30 to rotate the lid 30. In addition, even when the lid is placed in a state slightly shifted from the opening of the cup, stable mounting is possible. Therefore, even if the fitting groove introducing portion 31 of the lid 30 does not have an inner tapered surface, the lid can be reliably centered and attached to the cup. And since the blocking prevention rib 33 is formed in the inner peripheral wall 21 of the cyclic | annular protrusion part 3, it does not become obstructed when the spring 41 for cover presses contacts with a cover panel surface, and it mounts | wears favorably. be able to.

10 to 12 show an embodiment of a cup lid with a mouthpiece according to still another embodiment of the present invention.
The cup lid 50 of this embodiment is also suitable for application to a roller-type lid mounting device, and corresponds to a cup lid shown in FIGS. 7 to 9 in which blocking prevention ribs are formed on the outer peripheral wall of the annular ridge. . In the cup lid 50 according to the present embodiment, a plurality of anti-blocking ribs 51 are formed in the outer peripheral surface of the annular protrusion 52 so that the bottom surface is located at a predetermined depth from the top of the outer peripheral wall 54. Is formed. When the blocking prevention rib is provided on the outer peripheral surface of the annular protrusion, the height of the annular protrusion must be at least the same as the outer peripheral wall over the entire periphery, and the height direction of the blocking prevention rib 51 However, in the case of a normal cup, it is desirable that the length (depth) be in the range of 2 mm to 8 mm from the top of the outer peripheral wall 54. In this embodiment, the width | variety of the top part of the cyclic | annular protrusion 52 is formed widely in the part with the drinking mouth 53, and the other side is gradually reduced so that it may become the narrowest. By forming the blocking prevention rib 51 on the outer peripheral wall of the annular protrusion 52, the reinforcing effect of the outer peripheral wall 54 having a height higher than the inner peripheral wall 55 is increased, which is desirable. In this case as well, it is desirable to provide the anti-blocking rib 51 avoiding the vicinity of the position where the drinking mouth 53 is located. FIG. 12 shows a cross-sectional view in a state where the lids 50 are stacked, and the upper lid has an annular protrusion 52 fitted to the lower lid so that the annular protrusion of the lower lid is fitted. When the bottom surface 57 of the upper anti-blocking rib 51 is engaged with the top surface 56 of the strip portion 52, it can be rotatably stacked while maintaining a predetermined interval.
In addition, in the lid | cover of each above embodiment, although the thing which the drinking mouth is opened is shown, this drinking mouth may be a well-known drinking mouth with an openable / closable seal piece.

  The cup lid of the present invention can be suitably used for an apparatus that automatically attaches a lid after the contents are poured out by a vending machine, but is not limited to a vending machine, and is also applicable to an automatic or manual lid attaching apparatus at a store. It can be suitably used.

It is a top view of a cup lid concerning an embodiment of the present invention. It is the partially broken front view. It is an AA cross-sectional enlarged view of FIG. It is a BB cross-sectional enlarged view of FIG. It is a principal part cross-sectional enlarged view in the state which accumulated the lid | cover. (A) is a partially broken front view in the state which attached the lid | cover of this embodiment to the cup, (b) is an enlarged view of the B section in (a). It is a top view of the cup lid concerning other embodiments of the present invention. It is a partially broken front view of the cup lid shown in FIG. It is a schematic front view which shows the state which has mounted | wore the cup with the roller type lid | cover mounting apparatus. It is a top view of the cup lid concerning other embodiments of the present invention. It is CC sectional drawing of the cup lid shown in FIG. It is a cross-sectional enlarged view in the state which accumulated the lid | cover shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 30, 50 Cup lid 2 Panel surface 3, 52 Annular ridge part 4, 32 Annular groove 5 Fitting part 6 Lid cut-out engagement part 7 Curl part fitting groove 8 Inlet outer edge 9 Protruding part 10 Projection surface DESCRIPTION OF SYMBOLS 11 Hanging wall part 12, 31 Fitting groove introduction part 13 Inner taper surface 15 Outer taper surface 16 Drinking mouth 17 Bottom wall 18 Reinforcement rib
20, 33, 51 Blocking prevention ribs 21, 55 Inner peripheral walls 22, 56 Top surface 26 Cup 27 Curled portion 34 Annular rib 40 Roller type lid mounting device 41 Lid holding spring 42 Roller

Claims (8)

   A lid with a drinking mouth formed of a synthetic resin to be attached to a cup having a curled portion at the top of the opening, and a panel surface covering the center surface of the cup opening and an endless shape formed on the outer periphery of the panel surface. An annular ridge portion having a mouth, a curled portion fitting groove that protrudes endlessly through an annular groove on the outer side of the annular ridge portion, and the upper portion has a substantially arc-shaped cross section; and the curled portion A flange-shaped lid cut-out engaging portion protruding outward at an outer position below the fitting groove, and an anti-blocking rib in the circumferential direction on either the inner peripheral wall or the outer peripheral wall of the annular protrusion A cup lid, wherein a plurality of cup lids are formed.   2. The cup lid according to claim 1, wherein the blocking prevention rib is formed so as to protrude from an inner peripheral wall of the annular protrusion, and a top surface thereof is formed at a predetermined height from the panel surface.   2. The cup lid according to claim 1, wherein the blocking prevention rib is formed to be recessed in an outer peripheral wall of the annular ridge, and a bottom surface thereof is formed at a predetermined depth from a top of the outer peripheral wall.   A plurality of the anti-blocking ribs are formed on the same circumference, and in a state where the cup lids are stacked, the circumference of the anti-blocking ribs on the upper and lower lids so that the upper and lower anti-blocking ribs are not fitted to each other. The cup lid according to claim 1, wherein the cup lid is formed so as to be shifted from each other in the direction.   The curl portion fitting groove has a curl portion fitting groove inlet formed to be narrower than the maximum width of the curl portion fitting groove, and is tapered downward from the curl portion fitting groove inlet. An expanded fitting groove introducing portion is formed, and the fitting groove introducing portion is formed by an inner tapered surface constituting an outer wall of the annular groove and an outer tapered surface reaching the lid cutout engaging portion. Item 5. The cup lid according to any one of Items 1 to 4.   The cup lid according to any one of claims 1 to 4, wherein a plurality of reinforcing ribs are provided at a predetermined interval on a bottom portion of the annular groove provided between the annular protrusion and the fitting portion.   The curl portion fitting groove has a curl portion fitting groove inlet formed to be narrower than the maximum width of the curl portion fitting groove, and is tapered downward from the curl portion fitting groove inlet. An expanded fitting groove introducing portion is formed, the fitting groove introducing portion is formed only by an outer tapered surface reaching the lid cut-out engaging portion, and the annular groove is formed shallowly. The cup lid according to any one of the above.   The cup lid is formed to have an average thickness of 0.2 to 0.7 mm for a stopper type mounting device and 0.1 to 0.3 mm for a roller type mounting device. Item 8. The cup lid according to any one of Items 1 to 7.

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