JP3759149B2 - Small container outflow prevention device - Google Patents

Description

  The present invention relates to a base and a lid that prevent a liquid from flowing out due to a situation such as a fall or tilt during movement or storage of a small container.

  The entrance / exit of the small container is opened and closed using a combination consisting of a base, lid and packing, and depending on the liquid, the material such as metal, synthetic resin or rubber is considered, and the container and base are molded simultaneously or both are crimped. It is integrated and finished by joining means such as brazing, and a single or a plurality of high-precision screws are formed at the fitting portion of the base and lid, and a packing is inserted into one of them, and both are screwed to open and close.

There is also an application related to a means for preventing liquid leakage from a container. Patent Document 1 discloses a valve mechanism attached to an oil tank filler port such as a kerosene heater, and Patent Document 2 pivots to a cartridge tank filler port. Possible valve plate-equipped valve body structures are disclosed, all of which are intended to enhance leakage prevention and replenishment after refueling.
Japanese Utility Model 2-12-2937 Mito No. 3038239

  The liquid container uses a combination of a tightly sealed base and lid, but the reason for the liquid leaking out of the container is that the container body is damaged and leaks from an open hole, or the fitting between the base and the lid is tightened. There are two cases: insufficient filling or leakage from gaps caused by improper accuracy. The latter situation occurs when the container falls or tilts and the liquid level rises above the base.

  For such problems, if there is no leakage prevention valve, it is possible to increase the accuracy of the combination of the base and the lid or to confirm sufficient tightening, but the former has a problem regarding production cost, the latter is In the case of the previous application related to the leakage prevention valve described above, it is impossible to expect complete human operation, and it is impossible to open and close the leakage prevention valve on its own, and to open and close the discharge valve and leakage prevention valve. There is a problem that it is difficult to select a spring to rely on.

  As in Patent Document 2, when the valve-opening protrusion of the oil receiver provided on the kerosene heater side pushes the valve shaft and opens the leakage prevention valve, if the spring acting on the valve shaft is too strong, If the amount decreases, the container will rise, making it impossible to take out the residual oil, creating a necessity for locking the container, and if it is too weak, there is a problem of leaving the possibility of oil leaking from the valve shaft. .

  The present invention solves the above-mentioned problems related to liquid leakage, and the open / close operation for the lid cap opens the leakage prevention valve itself when it is closed, and similarly closes when it is removed or half-opened, and easily when refilling liquid. The object is to provide a device for preventing the outflow of a small container that opens.

The present invention relates to a small container including a combination of a discharge valve, a packing and a cylinder with a silencing function incorporating a spring, and a lid and a base in which the packing is mounted on the lid body, and a valve having a valve seat on the inner surface of the base body The body is inserted and fixed, a pivot fulcrum consisting of a support part and a support shaft is formed on the valve body, and a disc-shaped periphery is formed into an annular contact surface on the valve body consisting of a projecting part, a seat, and a support arm It has a leakage prevention valve that is a sealed part with a valve body and valve seat that share a pivot point by combining a kick spring as a biasing means, and the support arm of the valve body is a pivot point with a support part and a support shaft. In the fitting that constitutes, the hole opened in the support arm is a long hole with any play selected from the range of 0.2 to 1.0 mm in the vertical direction, and the valve body is opened perpendicularly downward from the initial position inner and time, than the nearest inner surface apex of the valve body of the dish-shaped protruding portion of the valve body Clearance of the center of the pivot point of the valve body with the support arm a structure on the outside, in combination with the valve seat and the valve element constituting the sealing portion, the seat front end annular surface of the valve body so that the The shape of each contact surface is a combination of either a straight line or a curved surface so that it contacts the side surface of the valve body inside the valve seat while keeping the value selected from the range of 0.1 to 0.15 mm Therefore, when the cylinder with a silencing function attached to the lid body is removed from the base or is in a half-open loose state, the leakage prevention valve is placed in a closed state, and the silencing function that is fitted when the lid is closed The tip of the attached tube is a device for preventing outflow of a small container, characterized in that the valve body of the leakage prevention valve is pushed downward to shift from a closed state to an open state,
A compact container with a combination of a discharge valve, packing and spring with built-in silencer and a lid with a packing attached to the lid body, and a valve body with a valve seat on the inner surface of the mouthpiece body. A rotating fulcrum composed of a support portion and a support shaft is formed on the valve body, and a plate-shaped periphery is formed as an annular contact surface. A valve body and a valve seat that combine a pivot fulcrum with a kick spring are equipped with a leakage prevention valve that serves as a sealing part, and the support arm of the valve body forms a pivot fulcrum between the support part and the support shaft. In this case, the hole formed in the support arm is a long hole having any play selected from the range of 0.2 to 1.0 mm in the vertical direction, and when the valve body is opened at a right angle downward from the initial position, The top of the disc-shaped projection of the valve body is inside the nearest inner surface of the valve body The angle of the side surface formed between the annular surface of the valve body constituting the sealing portion and the projecting portion is set to be 50 as the configuration in which the center of the rotation fulcrum of the support arm with the valve body is on the outside. Select from the range of ~ 90 degrees, the part from the side to the protruding part is a curved surface, the shape of the contact surface of the valve seat and the contact surface on the valve body side is a nearly semi-circular shape, with a silencing function attached to the lid body When the cylinder is removed from the base or in a half-open loose state, the leakage prevention valve is placed in the closed state, and when the lid is closed, the tip of the silenced cylinder attached is the valve body of the leakage prevention valve. This is a small container outflow prevention device characterized in that it is configured to shift downward from the closed state to the open state .

The following effects were obtained by using the leakage preventing apparatus of the present invention.
1) The leakage prevention valve is a combination with a silencer cylinder attached to the lid.It closes when the lid is removed or loosened half open, and opens when the lid is closed. The outflow is gone.
2) With the lid removed or half-opened loose, the liquid did not flow out even if the container fell or the tilted liquid level exceeded the base.
3) In a fuel container equipped with a spill prevention device, the leakage prevention valve opens when the lid is closed, so the valve opening projection of the heater only needs to open and close only the discharge valve. No worries about floating up and no longer left over.
4) The contact between the valve seat and the valve element has been eliminated by providing vertical play in the hole of the valve element support arm through which the valve element support shaft passes.
5) When the tip of the valve seat is in indirect contact with the annular contact surface of the valve body through the packing, the opening / closing operation of the leakage prevention valve is smooth due to the inclination of the side surface applied to the valve body or the depression of the root.
6) When the valve seat tip is in direct contact with the side surface of the valve body, a good opening and closing is obtained by providing a gap between the valve seat tip and the annular surface.
7) The number of breakage accidents decreased due to the shape and support structure of the kick spring

  The present invention provides a structure in which liquid does not leak from the fitting portion even when the container falls over when the lid and the base attached to the small container are insufficiently fitted, and the lid is removed from the base or loosened half-open. When it is in a state, the tip of the cylinder with the silencing function of the lid leaves the valve body in the base and closes the leakage prevention valve, and when the base is fully closed with the lid, the tip of the cylinder with the silencing function comes into contact with the valve body, It is a structure that opens the leakage prevention valve.

  The leakage prevention valve in the base, which is one of the components of the present invention, is removed from the base when the liquid level temporarily exceeds the base due to tipping or tilting when the container is handled with the lid removed or half-open loose. The purpose is to prevent a large amount of liquid outflow. In addition, since it is necessary to open the leakage prevention valve with a light force when replenishing liquid, the strength of the spring built into the leakage prevention valve is limited, and opening and closing smoothly even with a weak force to contact the valve body and valve seat. To obtain a sufficient sealing effect.

  The base has a structure in which a valve body with a valve seat is inserted inside the base body, and the valve body is attached to the valve seat to form a leakage prevention valve. Use it to fix it by caulking, etc., or press-fit the valve body from the opening of the base body on the connection side with the lid. In the case of the former press fitting, it is necessary to make the top of the opening (contact surface with the lid) higher than the top of the valve body. The reason for this is that the valve body is softer than the base body, and the surface is easily scratched to cause leakage. In the latter case, the valve body is covered with the base body, so there is no concern.

The valve body in contact with the valve seat of the valve body has a range of 0.2 to 1.0 mm in the vertical direction of the hole diameter of the valve body support arm that is fitted to the rotation fulcrum composed of the support portion and the support shaft of the valve body. It is preferably a long hole having a play selected from a range of 0.2 to 0.6 mm, more preferably a range of 0.3 to 0.4 mm. Either a combination of a kick spring and a support arm with a pressure plate or a single kick spring is used as an urging material to push the center of the valve body, and the valve body is pressed uniformly against the valve seat to avoid contact with the base. A packing such as an O-ring is sandwiched between the valve body and the valve body, and the base and the valve body are fixed by any means such as press fitting, screwing or caulking.

Since the kick spring uses a thin wire diameter selected from the range of 0.7 to 1.5 mm, if there is a sharp bend, it will easily break during use, and such breakage will serve to prevent leakage by opening the valve body. Therefore, it is preferable to provide a seat that locks the tip of the kick spring at the mounting portion of the mating counterpart so as to be as straight as possible except for the portion that fits with the support shaft at the rotation fulcrum.

  The contact position between the valve seat and the valve body is around the tip of the valve seat, and either the side surface or the lower annular surface of the valve body is the contact surface. When the inner surface of the valve seat tip is in direct contact with the side surface of the valve body to form a sealed portion, a clearance of about 0.1 to 0.15 mm should be secured between the tip of the valve seat and the annular portion of the valve body. When the annular part is used as the contact surface, the inner surface of the valve seat tip does not touch the side surface of the valve body, or the side angle on the side of the valve body is restricted so that opening and closing does not hinder contact, or relief such as a recess It is necessary to provide.

  The shape of the contact surface between the valve body and the valve seat is that the tip of the valve seat has a conical, flat, or semicircular cross section or a packing insertion groove in the valve seat itself, and the center of the valve body protrudes in a dish shape around Is basically a ring. When the annular part is used as the contact surface, the annular surface around the valve body that contacts the valve seat tip is either a cone, flat or semicircular cross section, and a single groove or packing groove or depression around the base of the annular surface and the side surface. And the inclination angle α (see FIGS. 1, 3 and 5) formed by the side surface and the bottom of the valve body is selected from a range of 50 to 90 degrees, and the inclination angle β of the depression (see FIG. 5) is 90. It is formed by selecting from a range of ˜120 degrees, and any one of the shapes is selected and configured by itself or in combination.

  The selection of the combination shape depends on whether packing is present on the contact surface between the valve body and the valve seat. When it is interposed, it becomes indirect contact utilizing the elasticity of the packing, and a favorable opening / closing operation can be obtained by applying an inclination selected from the above-mentioned range for the angle α of the side surface of the protruding portion of the valve body. If there is no interposition, the valve body and the valve seat are in direct contact, and in order to obtain a smooth opening and closing operation even if a weak spring is used, the angle given to the side of the protruding part of the valve body plays an important role, and it is an acute angle It is necessary to select from both the inclination and the obtuse depression.

  The lid, which is the other component of the present invention, has a discharge valve and a spring built in the inner surface, and a silencer cylinder with a compatible hole for liquid and air. When the cap is completely closed with the lid, the tip pushes the leak prevention valve to open the necessary gap, and when the pipe is removed or partially opened, the leak prevention valve is kept closed. The cylinder is either selected from a range of 2 to 10 mm, preferably a range of 2 to 6 mm, more preferably a range of 3 to 5 mm. Set to the length required to keep

  A small container with such a combination of a cap with a leakage prevention valve and a cover with a silencer cylinder is most suitable for a cartridge-type fuel container used in a kerosene heater, and the fuel container is attached to the heater and the fuel tray is opened. When pushing up the discharge valve of the lid with the projection for the liquid, no hydraulic pressure is applied to the discharge valve itself, so even if the amount of liquid in the container decreases and becomes lighter, the container position will float and change in the heater Absent. This combination of base and lid can be used for liquid supply equipment other than fuel, and it is sufficient to use steel or stainless steel metal, non-ferrous metal or oil-resistant synthetic resin alone or in combination. .

  The small container spill prevention device according to the present invention closes the leakage prevention valve when the lid is removed or the half-opening is loosened to enhance the safety of the container, and when the lid is closed, the leakage prevention valve opens, regardless of the change in the liquid level. Does not interfere with replenishment.

FIG. 1A shows an outflow prevention device 1 applied to a cartridge-type small container 9 of a kerosene heater. When the lid 2 is removed from the base 10, the tip of the silencer-cylinder 7 comes from the protruding portion 19 of the valve body 18. FIG. 1B is a sectional view of the closed state in which the valve seat 14 of the leakage prevention valve and the annular surface 21 of the valve element 18 are in contact with each other. FIG. FIG. 2 is an exploded perspective view of the components of the outflow prevention device 1. FIG. 2 is a sectional view of the open state in which the tip pushes the protrusion 19 of the valve body 18 and the contact between the valve seat 14 and the annular surface 21 of the valve body 18 is released. is there.

  1A and 1B, the lid 2 in FIG. 1A includes a lid body 3, a discharge valve 4, a packing 5, and a spring 6, and a cylinder 7 with a silencing function in which a compatible hole for liquid and air is provided in the periphery. And the packing 8, the length of the cylinder with the silencing function is such that when the cap 10 is closed with the lid 2 as shown in FIG. Select so that the body 18 is pushed and the gap (b dimension) with the valve seat 14 is opened at a maximum of about 5 mm, and when the lid 2 is removed from the base 10, it is half opened and slightly closed. did.

  The base 10 has a structure in which a leak-proof valve is fixed by screwing through an O-ring on the inner surface of the threaded molded metal, and the leak-proof valve is a thin disk on the valve seat 14 on the lower side of the valve body 13 having the support 16. A plate-like protrusion 19 is formed at the center of the valve body 18 and a valve body 18 provided with a support arm 24 is brought into contact with it to form a sealing portion. A recess 20 on the back surface of the valve body is provided with a support arm 26 additional pressure plate 25 and a kick spring. The support portion and the support shaft 17 form a rotation fulcrum 15 that rotatably supports the three support arms 24 and 26 and the spring. A light crown may be attached to the upper surface of the pressure plate 25.

  The hole of the valve body support arm 24 fitted to the support shaft 17 is a long hole provided with a play of 0.3 mm in the vertical direction perpendicular to the support shaft 17. The contact between the valve seat 14 and the annular surface 21 of the valve body 18 was prevented. Further, a support arm 26 with a pressure plate different from the valve body support arm and a kick spring 28 having a wire diameter of 1 mm are arranged side by side, and a seat 27 for receiving a rod-shaped portion extended at the tip of the kick spring is provided with a pressure plate. Since the support arm 26 is provided, there is no breakage even after long-term use, and the leakage prevention function is not lost.

  When the lid 2 is removed, the leakage prevention valve is in a closed state so that fuel does not flow even if the container falls. When the fuel supply pipe is inserted from the base when refueling, the leakage prevention valve has a weak kick spring 28. Easily transition from closed to open. At that time, the position of the rotation fulcrum is set so that when the valve body 18 is opened at 90 degrees, the upper surface of the protruding portion 19 is inside (a dimension) from the nearest inner surface of the valve body 13 so that the oil supply pipe can be inserted deeply. Decide.

  In the case of a flat contact surface formed by the combination of the valve seat 14 and the annular surface 21 shown in FIGS. 1A and 1B, the valve seat 14 temporarily comes into contact with the side surface 23 in the process of reaching the contact, and the smooth closing operation is performed. Therefore, a groove 22 (soot) is formed inward of the annular surface 21, and the angle α between the side surface 23 between the groove and the projecting portion 19 and the bottom surface of the valve body 18 is set to 75 degrees. The remaining portion reaching the portion 19 is formed in a gentle curved shape, thereby ensuring the smooth opening / closing operation of the valve seat 14 and the valve body 18.

  The inclination angle α of the side surface 23 of the valve body is necessary for a smooth opening and closing operation regardless of the shape of the valve seat. As shown in FIG. 3A, the valve seat has a conical shape and a portion extending from the annular surface of the valve body to the side surface. The contact surfaces 29 and 30 may be provided, or the contact surfaces 31 and 32 having a semicircular uneven structure may be provided in a portion from the valve seat and the valve body side surface to the annular surface as shown in FIG. The angle α is selected from a range of 50 to 90 degrees in consideration of the shape of the valve body and the valve seat. Preferably, as shown in FIG. 3C, a skirt 33 with an air vent is attached to protect the leakage prevention valve.

When mounting the valve body 13 in the base body 11, as shown in the combination of the base body and valve body in FIGS. 4A and 4B, a packing 12 such as oil-resistant rubber is inserted into the uppermost portion of the valve body 13A, Each screw 34, 35 is fixed with a combination screw, or the base body 1 of FIG. 4 (C, D, E, F).
As shown in the combination of 1A, 11B and valve body 13B, 13C, after inserting the packing into the groove 37 and press-fitting both, it is possible to attach a stopper by the protrusion 36, and this protrusion is processed and punched after fitting. . In the case of FIG. 4 (B), it may be easy to stop the screw 35 as a non-continuous part limited, but in the case of the screw type, the packing position is limited, and in FIG. There is an advantage that packing can be selected arbitrarily.

  As described above, the shape of the valve seat 14 and the shape of the valve body 18 are related, but the contact surface of the valve seat is conical as shown in FIG. 4 (A) or flat as shown in FIG. 4 (B). Or a material that constitutes a leakage prevention valve in consideration of the shape of any of the shapes in which the groove 38 is provided on the inner surface of the valve body 14A and the packing 39 is fixed by the ring-shaped presser 40 as shown in FIG. Is selected and used in combination. The material of the valve body 13, 13A, 13B, 13C and the valve body 18 of the main part of the leakage prevention valve may be a stainless steel metal, but considering the ease of manufacturing and the familiarity of the contact surface, an oil-resistant synthetic resin Is preferred.

  This example is the same material and substantially the same structure as Example 1 except for the valve body, the description of the part is cited, and in this example, only the matters related to the differences are described. As shown in FIG. 5A, in this example, the valve body 41 is directly pressurized by the kick spring 28, and the valve body has a thick annular surface 45 and side surfaces 44 and a dish-like protrusion 42 in the center. It is provided with a seat 43 for fixing the kick spring 28 on the back side, and is externally the same as the valve body of the first embodiment. The valve body with the support arm 46 is attached to the pivot fulcrum 15 provided on the valve body 13 by the support shaft 17 together with the kick spring 28, and the vertical play is given to the hole of the support arm 46 fitted to the support shaft 17. Since the valve body and the valve seat are in direct contact with each other in the same manner as in the first embodiment, the shape of the contact surface 48 of the valve seat and the contact surface 49 on the valve body side are formed in a shape close to a semicircle.

  As shown in FIG. 5 (B), when the contact surface 50 of the valve seat is a single pyramidal shape and the contact surface 51 on the valve body side is flat and partially semicircular, the annular surface 45A extends from the side surface 44A of the protrusion 42A. A recess 47 is formed in an annular shape at the root of the recess, and an angle β formed by the inclination of the recess and the bottom surface of the valve body 41A is set to 100 degrees to maintain smooth opening and closing. This angle may be selected and given from the range of 90 ° to 120 ° in consideration of the difference in the valve seat shape. This recess can avoid a situation where the valve seat tip contacts the side surface of the valve body when the valve body 41A is closed and the valve does not close. As shown in FIG. 5C, the contact surface 52 of the valve seat may be semicircular and the contact surface 53 on the valve body side may be conical.

  This example is the same material and substantially the same structure as the first and second embodiments except for the valve body, and the description of the part is cited, and in this example, only the matters related to the differences are described. As shown in FIG. 6, the valve body 55 is directly pressurized by the kick spring 28. The valve body has an annular surface 59, a dish-like projection 56 at the center, a support arm 54 on the back side, and a seat for the kick spring 28. 57, but a packing groove 60 is provided around the roots of the annular surface 59 and the side surface 58 and a packing 61 such as oil-resistant rubber is inserted, and the valve seat and the valve body are indirectly contacted via the packing surface 61A. This configuration is different from the second embodiment.

  The main parts of the valve seat, valve body and packing are shown in FIG. The valve body shape is determined by the shape of the packing, and there are many types, but the valve seat shape is either conical or flat. FIG. 7 (A) is the same as FIG. 6, FIG. 7 (B) is a flat packing 62 with a depression on the back, FIG. 7 (C) is a combination with a packing 63 with outward lip, and FIG. Fig. 8E shows a packing 65 with an inward lip, Fig. 8F shows a U-shaped packing 66, Fig. 10G shows a packing 67 with a projection and covering the front and back of the valve body. The figure (H) may be used in any combination with the O-ring 68.

  The indirect contact structure leakage prevention valve that uses packing can use the elasticity of the packing compared to the direct contact structure that is not used together, so there is no need to worry about contact with one another even if the molding accuracy of the contact part of the valve body and valve seat is moderate. However, as the packing deteriorates, it hardens and lacks elasticity, cracks occur, the sealing effect is diminished, and replacement is inevitable.

  The structure and function of the lid used in this example are the same as those of Examples 1 and 2, and the material composition of the base is the same, but the structure and the assembly are different. Stop to the explanation. 8 is a sectional view of the base, and FIGS. 9A and 9B are a single view of the base body 11C and the valve body 13D. From the opening 70 side on the connection side with the lid of the base body 11C, a flange 73, a packing groove 74, a projection 75 on one side of the cylindrical body, and a valve body 13D having a valve body mounting support 16 on the other side are press-fitted and fixed. In this structure, a projecting portion 78, a seat 79, an annular surface 81, and a valve body 77 with an indicating arm 76 are attached.

  When the valve body 13D is pushed into the step 71 of the opening 70 until it comes into contact with the flange 73, the packing 12 comes into contact with the surface of the inner wall 72 of the step and the projection 75 serves as a retaining member. The former is hard in the base body 11C and the valve body 13D. When the upper exposed surface of the flange 73 of the valve body is on a business trip when opening and closing with the lid, the top of the base 11C is sure to be above the top of the valve body 13D. (Indicated by c).

  The tip of the valve seat 14 provided in the lower part of the valve body 13D does not contact the annular surface 81 of the valve body 77, and maintains a gap (indicated by d) selected from the range of 0.1 to 0.15 mm. Since the seat tip inner surface is in direct contact with the valve body side surface 80, the movement of the valve body is smooth, and a good sealing effect is obtained. The contact surface between the valve seat and the valve body may be formed in a straight line or a curved line and used in any combination. The base structure including the valve body, the valve seat, and the valve body can be applied to the first, second, and third embodiments.

In the outflow prevention device of Example 1, (A) is a state in which the lid is removed and the outflow prevention valve is closed, and (B) is a cross-sectional view of the state in which the lid is closed and the outflow prevention valve is opened. It is a disassembled perspective view of the structural material of an outflow prevention apparatus. It is sectional drawing of another aspect of a nozzle | cap | die and an outflow prevention valve, (A) is a valve seat with a cone shape, (B) is a valve seat and a valve body with a semicircle shape, (C) is with the skirt of (A). Indicates. (A, B) shows the case where both are screwed together, and (C, D) and (E, F) show a protrusion after press-fitting both to prevent the cap body and valve body from being fixed. Is the case. FIG. 4 is a cross-sectional view of a cap of the outflow prevention device of Example 2, where (A) shows a semicircular contact surface between the valve seat and the valve body, and (B) shows a contact contact between the valve body and the contact surface of the valve seat. The surface of the valve seat is semicircular, and the contact surface of the valve seat is semicircular and the contact surface of the valve body is conical. It is base sectional drawing of the outflow prevention apparatus of Example 3. FIG. Sectional views of the combination of the valve seat, valve body and packing are shown in (A) to (H). FIG. 6 is a cross-sectional view of a base of an outflow prevention device of Example 4. It is sectional drawing of the single body of a nozzle | cap | die main body and a valve body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outflow prevention apparatus 2 Lid 3 Lid body 7 Silencer-equipped cylinder 8 Packing (for lid)
9 Small container 10 Base 11, 11A, 11B, 11C Base body 12 Packing (for valve body)
13, 13A, 13B, 13C, 13D Valve body 14, 14A Valve seat (contact surface)
15 Rotating fulcrum 18, 41, 41A, 55, 77 Valve body 19, 42, 42A, 56, 78 Protrusion 20 Depression 21, 45, 45A, 59, 81 Annular surface (contact surface)
22 Grooves 23, 44, 44A, 58, 79 Side surfaces 24, 46, 54, 76 Support arm 25 Pressure plate 26 Support arm 28 Kick springs 29, 31, 48, 50, 52 Contact surface (valve seat side)
30, 32, 49, 51, 53, 61A Contact surface (valve element side)
33 Skirt 34, 35 Screw 36 Projection 39 Packing (for valve seat)
47 annular recesses 60, 74 packing grooves 61-69 packing (for valve body)

Claims (6)

A cylinder (7) with a silencing function and a packing (8) with a discharge valve (4), a packing (5) and a spring (6), and a lid (2) and a base (10) mounted on the lid body (3). In a small container (9) having a combination, a valve body (13, 13A, 13B, 13C, 13D) having a valve seat (14, 14A) on the inner surface of the base body (11, 11A, 11B, 11C) is provided. The rotating fulcrum (15) consisting of a support portion (16) and a support shaft (17) is formed on the valve body, and a plate-like periphery is formed as an annular contact surface, and a projecting portion (78) is formed on the center front and back. A valve body (77) composed of a seat (79) and a support arm (76) is combined with a kick spring (28) as an urging means to share a rotation fulcrum (15), and the valve body and the valve seat are sealed. And a support arm (76) of the valve body (77) is provided with a support portion (16). And the support shaft (17) constitute a rotation fulcrum (15), and the hole formed in the support arm (76) is selected from the range of 0.2 to 1.0 mm in the vertical direction. When the valve body (77) is opened at a right angle downward from the initial position, the top of the disc-shaped protrusion (78) of the valve body is inside the nearest inner surface of the valve body (13). As described above, the center of the pivot fulcrum (15) of the support arm with the valve body is located outside, and in the combination of the valve seat (14) and the valve body (77) constituting the sealing portion, the tip of the valve seat is the valve Each contact surface is in contact with the side surface (80) of the valve body on the inner side of the valve seat while maintaining a gap with the annular surface (81) of the body selected from any range of 0.1 to 0.15 mm. with the arrangements in combination of any surface of the straight or curved shape, the cover body (3) mounted on the mute function with tube (7) When the lid (2) is removed from the base (10) or in the half-opened loose state, the leakage prevention valve is placed in the closed state, and when the lid (2) is closed, the tip of the mounted silencing function cylinder is An apparatus for preventing outflow of a small container, characterized in that the valve body of the leakage prevention valve is pushed downward to shift from a closed state to an open state. A cylinder (7) with a silencing function and a packing (8) with a discharge valve (4), a packing (5) and a spring (6), and a lid (2) and a base (10) mounted on the lid body (3). In a small container (9) having a combination, a valve body (13, 13A, 13B, 13C, 13D) having a valve seat (14, 14A) on the inner surface of the base body (11, 11A, 11B, 11C) is provided. The rotating fulcrum (15) consisting of a support portion (16) and a support shaft (17) is formed on the valve body, and a plate-shaped periphery is formed as an annular contact surface, and a protrusion (42) is formed on the center front and back. A valve body and a valve seat in which a rotary fulcrum (15) is shared by combining a kick spring (28) as a biasing means with a valve body (41, 41A) comprising a seat (43) and a support arm (46). A leakage prevention valve as a sealing portion is provided, and a support arm (46 of the valve body (41, 41A)) In the fitting in which the support portion (16) and the support shaft (17) constitute the rotation fulcrum (15), the hole formed in the support arm (46) is vertically adjusted in the range of 0.2 to 1.0 mm. When the valve body (41, 41A) is opened at a right angle downward from the initial position, the top of the disc-shaped protrusion (42, 42A) is the valve body ( 13) As the configuration in which the center of the pivot fulcrum (15) of the support arm with the valve body is on the outside so that it is inside the nearest inner surface of 13), from the annular surface (45) of the valve body (41) constituting the sealing portion The angle α formed by the side surface (44) formed between the protruding portion (42) and the bottom surface of the valve body is selected from a range of 50 to 90 degrees, and the portion extending from the side surface (44) to the protruding portion (42) is curved. And the shape of the contact surface (48) of the valve seat and the contact surface (49) on the valve body side are almost semicircular, and the lid body ( ) When the cylinder with silencer (7) attached to) removes the lid (2) from the base (10) or is in a half-open loose state, the leakage prevention valve is closed and the lid (2) is closed. The apparatus for preventing outflow of a small container is characterized in that the tip of the mounted cylinder with the silencing function is configured to push the valve body of the leakage prevention valve downward to shift from the closed state to the open state. When the base is pressed into the valve body (13D) from the opening (70) of the base body (11C), the flange (73) at the upper part of the valve body is in contact with the step (71) provided inside the opening. The protrusion (75) of the valve body (13D) serves as a retaining member, and the top of the base body (11C) that is the contact surface of the lid (2) is located above the top of the valve body. The small container outflow prevention device according to 1. In the combination of the valve seat (14, 14A) and the valve body (41, 41A) constituting the sealing portion, the contact surface at the tip of the valve seat is placed on the annular surface of the valve body. Item 3. The small container outflow prevention device according to Item 2. The opening dimension between the tip of the valve seat (14, 14A) constituting the sealing portion and the valve body contact surface (49, 51, 53) or the annular surface (81) is selected from the range of 2 to 10 mm. The apparatus for preventing outflow of a small container according to any one of claims 1 to 4, wherein the length of the silencer-equipped cylinder (7) attached to the lid body (3) is defined. The valve body (13, 13A, 13B, 13C, 13D) with valve seat (14, 14A) and the valve body (41, 41A, 77) are selected and combined from stainless steel or oil-resistant synthetic resin. The apparatus for preventing outflow of a small container according to any one of claims 1 to 5 .