JP4344981B2 - Synthetic resin pouring cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid pouring cap that is assembled and used in a casing tube, and that can be easily separated and collected at the time of disposal.
[0002]
[Prior art]
Conventionally, a pull-opening type liquid dispensing cap has been frequently used. This type of cap is formed of a cap body that is fitted and assembled to the mouth tube and an outer cap body that is screwed to the cap body, and is fitted by screwing or plugging the cap body into the mouth tube. Is done.
[0003]
On the other hand, in recent years, from the viewpoint of resource conservation and environmental conservation, it is necessary to separate and collect the dispensing cap from the housing container, and in the case of plastic containers, the used containers are crushed and recycled. For example, in the case of bottles containing seasoning liquids such as soy sauce or sauce, the bottles are washed so that the seasoning liquid does not remain inside the container after use. It is requested to do.
[0004]
In the case of a cap-type cap, it is not easily removed because it is plugged and assembled with a strong force into the mouthpiece tube, but as one method to meet the above requirements, For example, Japanese Utility Model Registration No. 2593426 and Japanese Patent Application Laid-Open No. 11-255251 describe a method of attaching a reinforcing ring to a cap body.
[0005]
In the utility model registration No. 2593426, the inner and outer double cylinder parts are suspended from the lower end of the nozzle-attached screw cylinder of the cap body and the outer cylinder through the outer flange piece, and the outer cylinder is used as the mouth cylinder. The assembly ring is fixed while getting over and locked, and a reinforcement ring is fitted between the outer cylinder and the locking cylinder from below, and the outer cylinder is in contact with the outer cylinder. A method is described in which after the weakened portion of the stopper cylinder is broken, the reinforcing ring is pulled upward and the dispensing cap is removed from the mouthpiece cylinder.
[0006]
Japanese Patent Application Laid-Open No. 11-255251 relates to a cylindrical outer cap body with a connecting piece at the lower end of a cylindrical wall so that it cannot be pulled out upward and can be moved downward. A method is described in which a piercing tube is externally covered with a reinforcing ring having an engaging bullet piece to be stopped, and the cap main body is removed by moving the reinforcing ring downward at the time of separate collection.
[0007]
[Problems to be solved by the invention]
However, in the method described in Japanese Utility Model Registration No. 2593426, it is necessary to fit a reinforcing ring in advance between the outer cylinder and the locking cylinder from below, and the fitting assembly process of the pouring cap to the mouthpiece cylinder On the other hand, when separating and collecting, the locking cylinder has a considerable thickness, and it is difficult to break the weakened part with the fingertips without grasping, and when using a screwdriver instead of a fingertip The tip is slippery and dangerous, and since the reinforcing ring is in contact with the outer cylinder and is in close contact with each other, it is difficult to remove it by pulling upward.
[0008]
In addition, the method described in Japanese Patent Application Laid-Open No. 11-255251 is intended to solve the problem of the utility model registration No. 2593426 by using a reinforcing ring having a special locking structure. There is a problem that the structure becomes complicated and the operation procedure is easy to make mistakes. If the procedure is wrong, there is a problem that the cap body is detached from the mouth tube while pulling the pull ring to open the spout. .
[0009]
Therefore, the present invention was devised to solve the above-mentioned problems. In particular, the reinforcing ring is used, it can be handled with a simple operation, and when the content liquid is present, it is sufficiently assembled to the mouthpiece. The objective is to provide a housing container that has low operability and safety, with low manufacturing costs, with the objective of developing a synthetic resin pouring cap that can be easily removed during separation and collection while maintaining strength. And
[0010]
[Means for Solving the Problems]
Of the present invention for solving the above technical problem, the means of the first invention is:
There is an assembled cylinder with a locking ridge around the locking tube that fits over the locking tube provided on the outer surface of the opening of the throat tube, and is fitted on the inner surface of the lower end. And having a cap body that is tightly fitted to the mouth tube to form a spout,
A cap-like outer cap body that is detachably screwed to the cap body to open and close the spout of the cap body;
Having a reinforcing ring in which a projecting piece is integrally connected from the end face of the ring main body so as to be in contact with and externally attached to the cylinder with the cap body and to be removed from the cylinder with the assembly;
Set the strength of the cap body to the throat tube to the extent that it can be removed manually by removing the reinforcement ring within a range that does not idle around the throat tube.
It is in.
[0011]
With the above-described configuration of the first invention , the reinforcing ring comes into contact with and extends to the locking protrusion provided on the inner peripheral surface of the lower end portion of the assembled cylinder of the cap body. This prevents the locking protrusion from getting over from the locking portion, preventing unauthorized removal of the dispensing cap during sales and storage, and removal due to defective operation, and sufficient assembly strength during use. The liquid is held stably and the content liquid is reliably prevented from coming off due to water hammer-like force.
[0012]
When separating and collecting the dispensing cap, the outer cap body is screwed off, and then the reinforcing ring is first removed by grasping the protruding piece provided on the upper end surface or the lower end surface with a finger or by applying the finger.
[0013]
Then, Ri by the removing the reinforcing ring, while releasing the inhibition of the bending deformation of the diameter direction of the set with tube, remove the cap body to form the stripping from the bottle mouth barrel. The assembling strength of the cap main body with respect to the throat tube is set to such an extent that it can be removed in a tear-off manner by hand, and this operation can be easily achieved.
[0014]
On the other hand, if the cap body assembly strength with respect to the throat tube is set too low to facilitate the removal operation, the cap body assembly tube will be idle with respect to the throat tube, and the outer cap body will be screwed together. Since it cannot be used while being screwed or unscrewed, the assembly strength is set to such an extent that it can be removed at the time of separation and collection within the range without such idle rotation.
[0015]
2nd invention makes the thickness of the assembly | attachment intensity | strength of the cap main body with respect to a throat cylinder in 1st invention the thickness of the assembly | attachment cylinder.
[0016]
In the second aspect of the invention , by reducing the thickness of the assembled cylinder, it becomes easier to bend and deform in the diameter-expanding direction by an external force, and conversely, it is difficult to bend and deform by increasing the thickness. That is, according to the thickness of the assembled cylinder, it is possible to set the assembled strength of the cap body with respect to the shed cylinder within an appropriate range without adding a special structure.
[0017]
According to a third aspect of the present invention , in the first aspect of the invention , the setting means for setting the strength of the cap body with respect to the mouth tube is provided with a split groove at least at the lower end portion of the cylinder with the cap body.
[0018]
In the third aspect of the invention , the amount of bending deformation of the assembled cylinder in the diameter expansion direction due to external force can be set with high accuracy by the number of slits, the arrangement relationship, the depth, and the like. The assembly strength of the cap body can be set with high accuracy within an appropriate range.
[0019]
According to a fourth aspect of the present invention , in the configuration of the first, second, or third aspect , the protruding piece is obliquely downward while extending a part of the ring body from one place on the lower end surface of the ring body of the reinforcing ring. It is formed as a strip-shaped break start piece integrally connected to the ring body, and is formed by a thin wire that is formed between the lower end surface of the ring body and the break start piece on the ring body and that has one end at the tip of an acute notch. In addition to the above, a configuration having a broken portion is added.
[0020]
In the fourth aspect of the invention , the reinforcing ring is broken and removed along the thin wall portion by gripping the strip-shaped breaking start piece with the fingertip and lifting it up. However, since it protrudes from the lower end surface of the reinforcing ring, it is easy to grasp, and further, the rupture due to the action of raising the rupture start piece starts from the notch part, so it is easy to break due to the stress concentration effect of the notch part, Removal can be achieved.
[0021]
According to a fifth aspect of the invention , in the configuration of the first, second, or third aspect, an outer wall-like bottom wall piece is coaxially formed on the outer side of the cap body assembly tube from the lower end of the assembly tube. Through which the retaining cylinder is erected, the reinforcing ring is fitted between the assembled cylinder and the retaining cylinder, and the reinforcing ring is pulled up from the fitted state to the upper end of the ring body. , And a pulling portion for attaching and detaching are integrally connected to each other.
[0022]
In this fifth invention , it is a configuration in which a reinforcing ring is fitted between the assembled cylinder and the locking cylinder, and after the cap body is fitted and assembled to the mouth cylinder by the stoppering operation, Since the auxiliary ring can be fitted from above, it is possible to increase the safety of the stoppering process, and when separating and collecting, it can be easily done by hooking the fingertip on the lifting part or by grasping with the fingertip. The reinforcing ring can be removed.
[0023]
According to a sixth aspect of the invention , in the configuration of the fifth aspect of the invention , the pulling portion has a flange portion integrally connected to the upper end of the ring body in the form of an outer casing. In addition, the flange tip of the flange portion protrudes outward from the outer peripheral surface of the locking cylinder.
[0024]
In the sixth aspect of the invention , the lower surface of the flange portion comes into contact with the upper end surface of the locking cylinder, so that the fitting position of the reinforcing ring is determined, and the flange end of the flange portion is more than the outer peripheral surface of the locking cylinder. Since it protrudes to the outside, at the time of separation and collection, the reinforcing ring can be pulled upward by placing a finger on this protruding portion and can be easily removed.
[0025]
According to a seventh aspect of the invention , in the configuration of the sixth aspect of the invention , a cylindrical guard cylinder is erected on the upper surface peripheral end portion of the flange portion via a connecting piece, and is provided at the lower end portion of the inner peripheral surface of the guard cylinder. The locking portion is locked to the locking projection provided on the lower end of the outer peripheral surface of the outer cylinder that is suspended from the peripheral edge of the top plate of the outer cap body through the outer flange piece, and the lower end of the outer cylinder is The configuration is such that it is configured so that it cannot be detached.
[0026]
In the seventh aspect of the invention , the purpose is to confirm and prevent the unauthorized opening of the housing container at the store during distribution, and the outer cap body cannot be opened unless the connecting piece is broken. If it is opened illegally, it can be confirmed visually.
[0027]
According to an eighth aspect of the present invention , in the configuration of the fifth aspect , a pull-up portion is provided, and an inner collar-shaped second inner collar piece is provided around the upper end of the ring body, and an arbitrary upper surface of the second inner collar piece is provided. The configuration is such that the pull-up piece is erected integrally from one place.
[0028]
In the eighth invention , the reinforcing ring can be easily removed by grasping the pulling piece with the fingertip and pulling it upward.
[0029]
In the ninth aspect of the invention , the spout formed in the cap body is further divided by a breaking groove that draws a closed loop on the sealing wall that is the bottom wall of the pouring cylinder provided to guide the pouring of the content liquid. A pull-open type spout opening that is formed by rupturing and removing the formed stopper and having a pull ring is added.
[0030]
In the ninth aspect of the invention , it is possible to reliably and securely achieve and maintain the sealing of the container until the opening of the spout.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment of a dispensing cap according to the present invention.
The pouring cap is composed of a cap main body 2 made of a low density polyethylene resin, an outer cap body 14, and a reinforcing ring 30.
[0032]
FIG. 2 is a semi-longitudinal sectional view showing a state in which the pouring cap according to the first embodiment of the present invention is assembled to the throat tube 23, and the cap body 2 is fitted to the throat tube 23. At the upper end of the cylinder 3, a threaded cylinder 7 having an outer peripheral surface engraved with a thread is erected via an inner collar-shaped top wall 6, and an inner collar piece 9 is disposed at the upper end of the threaded cylinder 7. The bottomed cylindrical pouring tube 10 whose upper end portion is enlarged in a trumpet shape is continuously provided, and an outer flange-shaped flange piece 6 a is extended from the top wall 6.
[0033]
In the present embodiment, the reinforcing ring 30 is removed within the range in which the strength of the cap body 2 with respect to the mouth tube 23 does not idle with respect to the mouth tube 23 by setting the thickness of the tube 3 with the assembly. In the state, it is designed so that it can be removed by hand.
[0034]
The sealing wall 13 constituting the bottom wall of the dispensing cylinder 10 is formed with a plug portion 13a having a pull ring 13c, which is partitioned by a breaking groove 13b formed in a closed loop shape, until the opening of the spout It is possible to reliably and firmly achieve the sealing of the casing container.
[0035]
The assembled tube 3 that fits outside the throat tube 23 has a locking ridge that moves over and locks a locking rim 24 provided on the outer peripheral surface of the opening of the throat tube 23 at the lower end portion of the inner peripheral surface thereof. 4 is provided, and is assembled and fixed to the mouthpiece cylinder 23 by this overcoming locking.
[0036]
The sealing cylinder 8 in which the threaded cylinder 7 is extended in a hanging shape is fitted into the opening of the throat cylinder 23 so that the assembly of the cap body 2 to the throat cylinder 23 is sufficiently dense, and the content liquid is sealed. It has a function to do.
[0037]
The outer cap body 14 is suspended from the top plate 15 so as to be tightly fitted into the opening end of the dispensing tube 10, and is suspended from the peripheral edge of the top plate 15. 7 and a main body cylinder 16 in which a thread is engraved on the inner peripheral surface, and an outer cylinder 19 that hangs down from the peripheral edge of the top plate 15 via an outer flange piece 18 and covers the main body cylinder 16. And have.
[0038]
The main body cylinder 16 and the outer cylinder 19 are connected by a plurality of rib pieces 19 a arranged in the circumferential direction, and the lower end surface of the outer cylinder 19 is in a state where the outer cap body 14 is completely screwed and assembled to the cap body 2. Is in contact with the upper surface of the flange piece 6a of the cap body 14.
[0039]
In addition, the cylindrical plug piece 17 is in contact with the inner peripheral surface of the dispensing cylinder 10a to exhibit a sealing function and exhibit a sealing effect of the dispensing cap.
[0040]
The reinforcing ring 30 includes a cylindrical ring main body 30a, and a strip-shaped fracture start piece 32a integrally connected obliquely downward while extending a part of the cylindrical wall from one portion of the lower end surface of the ring main body 30a. Also, it is formed by a thin line extending from the lower end surface of the ring body 30a and the break start piece 32a to the tip of an acute angle notch portion 37, spiraling substantially half way and reaching the upper end. A configuration having a fracture portion 31 is adopted.
[0041]
The cap body 2 is assembled to the throat cylinder 23 by previously fitting the reinforcing ring 30 onto the assembly cylinder 3 from below and then by plugging. Before the plugging, the assembly cylinder 3 is bent and deformed. Is easy, and the external fitting assembly operation of the reinforcing ring 30 is easy.
[0042]
In addition, the bottom surface of the flange piece 6a comes into contact with the upper end surface of the reinforcing ring 30 after the plugging, so that the reinforcing ring 30 can be stably fixed and held.
[0043]
When the housing container is used, the reinforcing ring 30 abuts the assembled cylinder 3 and suppresses bending deformation of the assembled cylinder 3 in the diameter increasing direction, so that sufficient assembly strength is stably maintained. In addition, it is possible to reliably prevent the pulling off due to the force at the time of opening the plug, the water hammer-like force of the content liquid, and the like.
[0044]
In order to separate and collect the dispensing cap, first, the fracture starting piece 32a of the reinforcing ring 30 is grasped and pulled by a finger, and the cylindrical wall is torn along the broken portion 31 to the upper end to remove the reinforcing ring 30. However, the notch portion 37 exhibits a stress concentration effect, and the tearing start operation that requires the most force can be easily performed.
[0045]
In the state where the auxiliary ring 30 is removed, the restraint to the deformation deformation in the diameter expansion direction of the assembled cylinder 3 is reduced, and the assembled strength is set to such an extent that it can be removed manually. Can be removed.
[0046]
In the second embodiment shown in FIG. 4, six split grooves are formed at equal intervals on the lower end of the assembled cylinder 3 of the cap body 2 so that the assembled strength of the cap body 2 with respect to the mouthpiece 23 is within an appropriate range. 4a is formed in a range where the assembled strength does not idle with respect to the mouthpiece tube 23, and in a state in which the reinforcing ring 30 is removed, it is possible to remove the tear-off shape manually. Is set.
[0047]
In the third embodiment shown in FIG. 5, the locking cylinder 12 is erected from the lower end of the assembled cylinder 3 via the outer wall-shaped bottom wall piece 11 and is reinforced between the assembled cylinder 3 and the locking cylinder 12. The ring 30 is configured to be fitted, and a flange portion 32b1 is protruded from the upper end surface end of the reinforcing ring 30 so that the reinforcing ring 30 is pulled upward and detached and fitted.
[0048]
The reinforcing ring 30 may be fitted between the assembled cylinder 3 and the locking cylinder 12 after the cap body 2 is fitted and assembled to the mouthpiece cylinder 23 with a stopper, which facilitates the stoppering operation and reinforces the reinforcing ring 30. Since the ring 30 can be fitted from above, the entire ring can be easily operated. At this time, the lower surface of the flange portion 32b1 abuts against the upper end surface of the locking cylinder 12, so that the reinforcing ring 30 The fitting position can be determined.
[0049]
In addition, when separating and collecting the extraction cap, the flange tip of the flange portion 32b1 is configured to protrude outward from the outer peripheral surface of the locking cylinder 12, so that the fingertip is hooked on this portion and pulled upward, The reinforcing ring 30 can be easily removed.
[0050]
In the fourth embodiment shown in FIGS. 6 and 7, a cylindrical guard cylinder 34 is erected on the upper surface peripheral end of the flange portion 32 b 1 via a connecting piece 35, and the lower end of the inner peripheral surface of the guard cylinder 34 is provided. The engaging portion 34a provided on the outer cap body 14 is engaged with the engaging convex portion 20a provided on the lower end portion of the outer peripheral surface of the outer cylinder 19 that is suspended from the peripheral edge of the top plate 15 of the outer cap body 14 via the outer flange piece 18. The lower end portion of the exterior cylinder 19 is externally installed so that it cannot be detached. Further, the guard tube 34 is provided with a cut portion 34b from above and below at one place.
[0051]
The above configuration is aimed at confirming and preventing the unauthorized opening of the casing container at the storefront during distribution, and the outer cap body cannot be opened unless the connecting piece 35 is broken. The guard tube 34 is first removed while breaking the notch 34b and the connecting piece 35 during use.
[0052]
In the fifth embodiment shown in FIGS. 8 and 9, instead of the flange portion 32b1 of the second embodiment, an inner collar-shaped second inner collar piece 36 is provided around the upper end of the reinforcing ring 30, and this 2. The pulling piece 36b2 is integrally provided upright from one place on the upper end surface of the inner flange piece 36.
[0053]
With the above structure, Ri by the raising Ru possible while grasping the pulling piece 36b2 with a fingertip, it is possible to remove the reinforcing ring 30 easily.
[0054]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
In the first invention , by providing a protruding piece and facilitating the removal of the reinforcing ring, it is possible to easily maintain the assembly strength of the pouring cap at the time of use and to easily remove it at the time of separation and collection. It can be realized with a simple structure.
[0055]
In the second invention , the assembly strength can be set appropriately by the thickness of the assembly cylinder without adding a special structure.
[0056]
In 3rd invention, it is the method of providing a split groove, and can set the assembly | attachment intensity | strength highly accurately in the appropriate range according to the structure and usage method of a housing container.
[0057]
In the fourth invention , the reinforcing ring can be easily removed by the fracture starting piece.
[0058]
In the fifth invention , the auxiliary ring is attached to the cap body from above, so that the dispensing cap can be assembled by a simple operation.
[0059]
Sixth invention, the auxiliary ring, Ri by the the provision of the flange portion, at the time of separated collection can be removed easily auxiliary ring by hooking a finger on the flange.
[0060]
In the seventh invention , by providing the guard cylinder, it is possible to confirm and prevent the unauthorized opening of the casing container at the store, especially during distribution.
[0061]
In the eighth invention , the reinforcing ring can be easily removed at the time of separation and collection by providing the pulling piece on the reinforcing ring.
[0062]
In the ninth aspect of the invention , since the spout is a pull-open type, it is possible to achieve and maintain the hermetic container tightly and firmly until the spout is opened.
[0063]
As noted above, dispensing cap of the present invention, in particular, Ri by the fact that to facilitate the removal of the reinforcing ring, both the retention of sufficient assemblage strength during use, easy fractional recovery of the bottle Thus, it is possible to provide a housing container with low manufacturing cost and high operability and safety.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a dispensing cap according to a first embodiment is assembled into a throat tube.
FIG. 2 is a semi-longitudinal sectional view showing a state in which the pouring cap of the first embodiment is assembled into a shed tube.
FIG. 3 is a half longitudinal sectional view showing a sorting operation state of the dispensing cap of the first embodiment.
FIG. 4 is a perspective view showing a cap body of a dispensing cap according to a second embodiment.
FIG. 5 is a semi-longitudinal sectional view showing a state in which a dispensing cap according to a third embodiment is assembled into a shed tube.
FIG. 6 is a semi-longitudinal sectional view showing a state in which the dispensing cap of the fourth embodiment is assembled into a shed tube.
FIG. 7 is a perspective view showing a reinforcing ring according to a fourth embodiment.
FIG. 8 is a semi-longitudinal sectional view showing a state in which the dispensing cap of the fifth embodiment is assembled into a shed tube.
FIG. 9 is a perspective view showing a reinforcing ring of a fifth embodiment.
[Explanation of symbols]
2; Cap body 3; Assembly cylinder 4; Locking protrusion 4a; Split groove 5; Spout 6; Top wall 6a; Flange piece 7; Screw cylinder 8; Seal cylinder 9; Inner collar piece 10; 11; Bottom wall piece 12; Locking cylinder 13; Sealing wall 13a; Unplugging part 13b; Breaking groove 13c; Pull ring 14; Outer cap body 15; Top plate 16; Main body cylinder 17: Plug cylinder piece 18; Rib piece 20; Bottom end 20a; Locking projection 23; Mouth tube 24; Locking circumference 30; Reinforcing ring 30a; Ring body 31; Breaking portion 32; Projection piece 32a; Breaking start piece 34; Guard tube 34a; Locking portion 34b; Cut portion 35; Connection piece 32b; Pull-up portion 32b1; Flange portion 32b2; Pull-up piece 36; Second inner flange piece 37;

Claims (4)

A locking ridge (4) that climbs over and engages with a locking circumferential line (24) provided on the outer peripheral surface of the opening of the throat tube (23) is provided around the inner peripheral surface of the lower end portion to form the throat tube (23). A cap body (2) having a top cylindrical shape that is tightly fitted to the mouthpiece cylinder (23) by an assembled cylinder (3) that is externally fitted to the top wall (6), and opens a spout (5) on the top wall (6), The cap main body (2) is detachably screwed and assembled, and a cap-shaped outer cap body (14) that opens and closes the spout (5), and a contact exterior to the assembled cylinder (3) And a reinforcing ring (30) integrally provided from the end face of the ring body (30a) for removing the protruding piece (32) from the assembled cylinder (3), and the assembled cylinder (3) A locking cylinder (12) is erected on the outer side of the assembly cylinder (3) from the lower end of the assembly cylinder (3) via an outer flange-shaped bottom wall piece (11), and the assembly cylinder (3) The reinforcing ring (30) is fitted between the retaining cylinder (12) and the reinforcing body in the fitted state as a protruding piece (32) on the upper end of the ring body (30a). The flange part (32b1) for pulling up the ring (30) upward and disengaging it is integrally connected like an outer casing, and the lower surface of the flange part (32b1) is in contact with the upper end surface of the locking cylinder (12), The flange end of the flange portion (32b1) protrudes outward from the outer peripheral surface of the locking cylinder (12), and the strength of the cap body (2) assembled to the flange cylinder (23) A synthetic resin pouring cap which is set so that it can be removed by hand in a state where the reinforcing ring (30) is removed within a range where the tube (23) does not run idle.   A cylindrical guard cylinder (34) is erected on the upper peripheral edge of the flange part (32b1) via a connecting piece (35), and is provided at the lower end of the inner peripheral surface of the guard cylinder (34). The stopper (34a) is provided at the lower end of the outer peripheral surface of the outer cylinder (19) suspended from the peripheral edge of the top plate (15) of the outer cap body (14) via the outer flange piece (18). The synthetic resin pouring cap according to claim 1, wherein the plastic cap is configured to be engaged with a retaining projection (20a) and so that a lower end portion of the exterior cylinder (19) is exteriorly detached. A locking ridge (4) that climbs over and engages with a locking circumferential line (24) provided on the outer peripheral surface of the opening of the throat tube (23) is provided around the inner peripheral surface of the lower end portion to form the throat tube (23). A cap body (2) having a top cylindrical shape that is tightly fitted to the mouthpiece cylinder (23) by an assembled cylinder (3) that is externally fitted to the top wall (6), and opens a spout (5) on the top wall (6), The cap main body (2) is detachably screwed and assembled, and a cap-shaped outer cap body (14) that opens and closes the spout (5), and a contact exterior to the assembled cylinder (3) And a reinforcing ring (30) integrally provided from the end face of the ring body (30a) for removing the protruding piece (32) from the assembled cylinder (3), and the assembled cylinder (3) A locking cylinder (12) is erected on the outer side of the assembly cylinder (3) from the lower end of the assembly cylinder (3) via an outer flange-shaped bottom wall piece (11), and the assembly cylinder (3) The reinforcing ring (30) is fitted between the locking cylinder (12) and the inner ring-shaped second inner collar piece (36) is provided around the upper end of the ring body (30a), In the second A configuration in which a pulling piece (32b2) is integrally erected from one place on the upper end surface of the piece (36) as a protruding piece (32) to pull up and remove the reinforcing ring (30) in the fitted state. The strength of the cap body (2) assembled to the throat tube (23) is in a range where the reinforcing ring (30) is removed within a range that does not idle with respect to the throat tube (23). , Synthetic resin pouring cap that can be removed by hand. Sealing wall (13) which is the bottom wall of the dispensing cylinder (10) provided with a spout (5) opened in the top wall (6) of the cap body (2) to guide the dispensing of the content liquid In addition, a pull-open type spout (5), which is defined by a breaking groove (13b) that draws a closed loop and is opened by breaking and removing the stopper portion (13a) having a pull ring (13c) , A synthetic resin pouring cap according to 2 or 3 .

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