JP2012006346A - Cap unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent situations where an inner lid comes off during storage and the inner lid cannot be removed in fixing a flat tire.SOLUTION: A cap unit is provided with: a cap body 33 having a mouth part attaching recess 36A to which the mouth part 7 of a bottle container 3 is attached; and an inner lid 34 for closing an air channel 31 provided in the cap body 33 and a sealant/compressed air take-out channel 32. The inner lid 34 is equipped with a plug body part 43 inserted into the sealant/compressed air take-out channel 32 to close the sealant/compressed air take-out channel 32 in the inner lid body 42 engaged with the outer circumferential surface of a boss part 36B erected from the bottom surface of the mouth part attaching recess 36A and having opened one end of each of the air channel 31 and the sealant/compressed air take-out channel 32 in the upper surface. An auxiliary removing means 45 for removing the inner lid 34 from the boss part 36B by manually pushing up the plug body part 43 is provided in the cap body 33.

Description

  The present invention relates to a cap unit for use in a tire puncture emergency repairing device for repairing punctures by injecting a puncture sealing agent and compressed air sequentially into a punctured tire.

  For example, Patent Document 1 below proposes a cap unit for use in a tire puncture emergency repair device that punctures are repaired by sequentially injecting a puncture sealing agent and compressed air into a punctured tire.

  As shown in FIG. 10, the cap unit a includes a cap main body c to which a bottle container b of a puncture sealing agent is attached, an air flow path d formed in the cap main body c, a sealing agent / compressed air extraction flow path e It is comprised from the inner lid f which closes. Specifically, the cap body c has a boss portion c2 standing on the bottom surface of the mouth portion mounting recess c1 into which the mouth portion b1 of the bottle container b is screwed. The inner lid f has an inner lid body fa with an upper plate portion f2 closed at the upper end of a cylindrical body portion f1 fitted to the outer peripheral surface of the boss portion c2, and the upper plate portion f2 includes The plug part fb that closes the sealing agent / compressed air outlet e1 forming one end of the sealing agent / compressed air outlet passage e is protruded.

  The cap unit a is stored on-board with the bottle container b attached. Then, at the time of puncture repair, piping is applied to the unit a in this state to operate the compressor g. As a result, compressed air flows into the inner lid body fa through the air flow path d, and the inner lid f is automatically removed from the boss portion c2 due to an increase in internal pressure. Thereafter, the puncture sealing agent in the bottle container b and the compressed air from the compressor g are sequentially injected into the tire T, and the puncture emergency repair and the tire T pump up are continuously performed.

  As described above, as a function of the inner lid f, it is fitted to the boss part c2 during storage, and the internal puncture sealing agent is prevented from flowing into the air flow path d or the sealing agent / compressed air take-out flow path e. And at the time of puncture repair, it is required that the boss part c2 is detached by the compressed air from the compressor g.

  However, since the inner lid f is formed of synthetic resin, its elasticity, that is, the fitting force with the boss part c2, varies greatly depending on the environmental temperature. Therefore, for example, when the fitting force is set so that it does not come off from the boss part c2 during storage, the rigidity of the inner lid f increases when used in a low-temperature environment, and it cannot be removed by the compressed air from the compressor g. There arises a problem that repair cannot be performed. FIG. 11 shows an example of the relationship between the environmental temperature and the removal pressure of the inner lid f. Since the compressed air for puncture repair is normally about the maximum allowable air pressure (350 kPa) of passenger car tires, in this example, it can be understood that the inner lid f cannot be removed when it falls below about −33 ° C.

JP-A-2005-319615

  Therefore, the present invention adds an auxiliary removing means for manually pushing up the plug portion of the inner lid and removing the inner lid from the boss when the inner lid does not come off from the boss due to the pressure of compressed air. The object of the present invention is to provide a cap unit that can achieve both prevention of inner lid removal during storage and prevention of inner lid removal failure during puncture repair.

In order to solve the above-mentioned problems, the invention of claim 1 of the present application attaches to the mouth of a bottle container containing a puncture sealing agent, and supplies an air flow path for sending compressed air from a compressor into the bottle container, and the compression A cap body having a sealing agent / compressed air take-out flow path for sequentially taking out the puncture sealing agent and compressed air from the bottle container by feeding air;
And a cap unit comprising an inner lid for closing the air flow path and the sealing agent / compressed air take-out flow path,
The cap main body has a mouth mounting recessed portion for inserting and fixing the mouth portion of the bottle container at an upper end portion, and an inner lid that rises from the bottom surface of the mouth mounting recess and has the inner lid fitted on the outer peripheral surface. It has a boss part as a fitting surface,
Moreover, an air intake opening that forms one end of the air flow path and a sealing agent / compressed air discharge opening that forms one end of the sealing agent / compressed air discharge flow path are opened inside the inner lid fitting surface. ,
The inner lid has an inner lid body in which an upper end of a cylindrical trunk portion fitted on the inner lid fitting surface is closed by an upper plate portion,
And the inner lid body is provided for removing the inner lid from the boss portion by the pressure of compressed air flowing into the inner lid body from the air intake port, and projects downward from the upper plate portion and the sealing And a plug body portion that is inserted into the agent / compressed air outlet and closes the sealing agent / compressed air outlet,
When the inner lid does not come off the boss portion due to the pressure of the compressed air, the cap body is provided with auxiliary removing means for manually pushing up the plug portion of the inner lid and removing the inner lid from the boss portion. It is characterized by that.

In the invention of claim 2, the sealing agent / compressed air take-out flow path is bent at a vertical flow path portion extending downward from the sealing agent / compressed air take-out port, and a lower end of the vertical flow path portion, and The sealant and the compressed air take-out flow path form the other end of the sealant and the compressed air discharge port, and the side of the flow path extends to the L shape.
The auxiliary detachment means is connected to the lower end of the vertical flow path portion, and the extended flow path portion extends in a straight line from the vertical flow path portion to the lower opening that opens on the bottom surface side of the cap body. The extension channel portion is slidably held up and down and has a push shaft that can push up the plug portion by sliding upward.

According to a third aspect of the present invention, the push shaft includes an insertion portion that is airtightly arranged in the extension flow path portion via an O-ring, and a protrusion portion that continues to the insertion portion and protrudes downward from the lower opening. With
Moreover, the push shaft can move between a descending position whose upper end is lower than the lower end of the vertical flow path portion and an elevated position where the lower end of the plug body portion is pushed upward to remove the inner lid. The protruding portion is provided with spring means for urging the push shaft downward to return it to the lowered position.

  The invention according to claim 4 is characterized in that a distance by which the push shaft pushes up the plug body portion is 1 to 5 mm.

  In the present invention, as described above, the inner lid body is provided with a plug portion for closing the sealing agent / compressed air outlet. Therefore, in a normal use environment, the inner lid can be automatically removed by compressed air from the compressor at the time of puncture repair, and the usability can be improved. In addition, since the cap body is provided with auxiliary removal means, the cap unit can be reliably removed by removing the inner lid from the boss in a special use environment, such as in a low-temperature environment. be able to.

It is a perspective view which shows the use condition of the tire puncture emergency repair apparatus using the cap unit of this invention. It is a perspective view which shows a cap unit. It is sectional drawing which shows the state which attached the bottle container to the cap unit. It is sectional drawing which shows the attachment state of an inner cover. It is sectional drawing which shows the deformation | transformation by filling with the compressed air of an inner cover. (A), (B) is a fragmentary sectional view explaining the function of an auxiliary | assistant removal means. It is sectional drawing which shows the state before the connection of a cap unit and a compressor. It is sectional drawing which shows the connection state of a cap unit and a compressor. It is sectional drawing which shows the cross section of a bottle container. It is sectional drawing which shows the conventional cap unit. It is a graph which shows the relationship between environmental temperature and the removal pressure of an inner lid.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a perspective view showing a use state of a tire puncture emergency repair device 1 using a cap unit 2 of the present invention. The tire puncture emergency repair device 1 caps a bottle container 3 containing a puncture sealing agent. A bottle unit 4 attached to the unit 2 and a compressor 5 connected to the bottle unit 4 are provided.

  In the present example, the compressor 5 and the bottle unit 4 are directly connected at the puncture repair site without interposing hoses. Further, the other end of the feeding hose 6 whose one end is connected to the air valve Tv of the tire T is connected to the sealing agent / compressed air discharge port 32 b provided in the cap unit 2. The bottle unit 4 is connected to the compressor 5 in an inverted state with the cap unit 2 facing downward. Reference numeral 9 in the figure is a power plug for driving the compressor 5 and is connected to a cigar socket of an automobile in this example. Reference numeral 10 denotes a pressure gauge of the compressor 5.

Next, as shown in FIG. 3, the bottle container 3 protrudes from the lower end of the body portion 30 with a small-diameter cylindrical mouth portion 7 through which a puncture sealing agent can be taken in and out. In the present example, as shown in FIG. 9, the trunk portion 30 has a pair of long side portions 30 </ b> A whose cross section perpendicular to the height direction curves in a convex arc shape toward the outside of the bottle, and a convex arc shape. And a pair of short side portions 30B that are curved in a substantially rectangular shape surrounding the four sides. When the length of the long side portion 30A is W, the radius of curvature of the long side portion 30A is RW, the length of the short side portion 30B is D, and the radius of curvature of the short side portion 30B is RD, The following formulas (1) to (3) are set to be satisfied.
1.3 ≦ W / D ≦ 1.7 (1)
0.5 ≦ RW / W ≦ 3.0 (2)
0.5 ≦ RD / D ≦ 20.0 −−− (3)

  Here, when considering the stowability of the tire puncture emergency repair device 1 in the vehicle, for example, in the trunk, the compressor 5 has a substantially rectangular parallelepiped shape, so that the body portion 30 of the bottle container 3 is also formed in a substantially rectangular parallelepiped shape. Is preferred. However, at the time of puncture repair, a high internal pressure, for example, close to 350 kPa acts on the bottle container 3. At this time, when the body part 30 has a circular cross section, the body part 30 expands evenly in the radial direction due to internal pressure, so that deformation at the time of filling with compressed air is not recognized so much, and the user feels uneasy. It will be low. However, when the body portion 30 has a rectangular cross-section, the swelling due to the internal pressure is not uniform, and the amount of deformation is felt to be larger than the actual size, such as expansion from a rectangular cross-section to a circular cross-section. For this reason, there is a possibility of giving the user anxiety such as a rupture even though the pressure resistance is within the range.

  Therefore, in this example, the long side portion 30A and the short side portion 30B are each formed in a convex arc shape, and are formed in a shape close to the deformed shape at the time of expansion. Therefore, while improving the storage property, the deformation at the time of filling with compressed air is not recognized so much, and the user's anxiety can be kept low.

  As a result of the inventor's experiment, in order to suppress the feeling of anxiety, it is important to suppress the amount of expansion on the long side, and for that purpose, the length W on the long side is increased and the radius of curvature RW is increased. It is preferable to set a small value. If the ratio W / D is less than 1.3 or the ratio RW / W is more than 3.0, the length W is relatively small or the radius of curvature RW is large and the expansion amount on the long side is increased. Increase. On the contrary, when the ratio W / D exceeds 1.7 or the ratio RW / W is less than 0.5, the storage property is disadvantageous. If the ratio RD / D exceeds 20.0, the amount of expansion on the short side increases, and the deformation at the time of filling with compressed air increases. Conversely, if the ratio RD / D is less than 0.5, This causes a disadvantage in storage. From such a viewpoint, the lower limit of the ratio W / D is more preferably 1.4 or more, and the upper limit is more preferably 1.6 or less. The lower limit of the ratio RW / W is more preferably 0.7 or more, and the upper limit is more preferably 2.0 or less. The lower limit of the ratio RD / D is more preferably 1.0 or more, and the upper limit is more preferably 10.0 or less.

  The corner portion where the long side portion 30A and the short side portion 30B intersect is preferably formed by an arc 30C having a radius of curvature of 15 mm ± 5 mm in order to ease stress concentration and improve pressure resistance.

  Next, as shown in FIGS. 2 and 3, the cap unit 2 includes a cap body 33 and an inner lid 34 attached to the cap body 33, and the cap body 33 is attached to the mouth portion 7 of the bottle container 3. The cap body 33 includes an air flow path 31 for sending the compressed air from the compressor 5 into the bottle container 3, and a sealing agent for sequentially taking out the puncture sealing agent and the compressed air from the bottle container 3 by feeding the compressed air. -It has the compressed air extraction flow path 32. Further, the inner lid 34 closes the air flow path 31 and the sealing agent / compressed air take-out flow path 32 in the bottle container 3, and the puncture sealant removes the air flow path 31 and the sealing agent / compressed air take-out during storage. Outflow to the flow path 32 is prevented.

  Specifically, the cap body 33 is integrally provided with a bottom plate portion 35 forming a bottom surface 33S, a mouth portion attaching portion 36 for attaching the mouth portion 7 of the bottle container 3, and a constricted portion 37 disposed therebetween. Yeah.

  The mouth portion attaching portion 36 has a mouth portion attaching recess 36A for inserting and fixing the mouth portion 7, and a boss portion 36B rising from the bottom surface of the mouth portion attaching recess 36A. The mouth portion mounting recess 36A can be screwed into the mouth portion 7 with an inner screw provided on the inner wall surface thereof. The boss portion 36B has a cylindrical shape with an outer peripheral surface of the boss portion 36B as an inner lid fitting surface 38 on which the inner lid 34 is fitted, and an air intake opening that forms one end of the air flow path 31 on the upper surface. 31a and a sealing agent / compressed air outlet 32a forming one end of the sealing agent / compressed air outlet passage 32 are opened.

  The air flow channel 31 includes a vertical flow channel portion 31A extending downward from the air intake port 31a, and an air supply port 31b that is bent at the lower end of the vertical flow channel portion 31A and forms the other end of the air flow channel 31. It forms an L shape consisting of a horizontal flow path portion 31B extending horizontally. Further, in this example, a one-way valve 39 for preventing the puncture sealing agent from flowing backward from the air intake port 31a is formed in the vertical flow path portion 31A.

  As shown in FIG. 4, the one-way valve 39 includes a large-diameter valve chamber 40 formed in the middle of the vertical flow path portion 31A, and a ball valve 41 accommodated in the valve chamber 40 so as to be movable up and down. With The valve chamber 40 is provided with a valve seat portion 40b sealed at the lower end thereof by the ball valve 41, and a compressed air flow-through portion through which compressed air can flow through the upper end portion of the valve chamber 40. 40a is provided. In this example, the compressed air flow portion 40a is formed of a coiled body having a spiral groove, and prevents the upper end portion of the valve chamber 40 from being sealed by the ball valve 41 that rises by the compressed air.

  The sealing agent / compressed air take-out flow path 32 is bent at the vertical flow path portion 32A extending downward from the sealing agent / compressed air take-out port 32a, and at the lower end of the vertical flow path portion 32A, and the sealing agent / compressed air take-out flow path 32a is bent. It has an L-shape comprising a horizontal flow path portion 32B extending horizontally to the sealing agent / compressed air discharge port 32b forming the other end of the compressed air extraction flow path 32. In this example, the vertical flow path portion 32A is formed as a central hole passing through the center of the boss portion 36B.

  Next, the inner lid 34 is made of an elastically deformable synthetic resin material such as polyethylene or polypropylene, and its inner peripheral surface is fitted to the inner lid fitting surface 38 as shown in an enlarged view in FIG. An inner lid main body 42 that closes the upper end of a cylindrical body portion 42a with an upper plate portion 42b, and projects downward from the upper plate portion 42b and is inserted into the sealing agent / compressed air outlet 32a. A plug portion 43 that closes the compressed air outlet 32a is provided.

  In this example, the upper plate part 42b has a substantially hemispherical shape having an arc part 42b1 connected to the body part 42a by an arc having a curvature radius R, and the curvature radius R is set to the inner diameter D1 of the body part 42a. Is set in a range of 0.3 to 0.5 times the value of. The radius of curvature R is the radius of curvature of the inner surface of the arc portion 42b1, and when R = 0.5 × D1, the upper plate portion 42b is substantially a hemispherical surface formed only of the arc portion 42b1. Formed. When 0.3 × D1 ≦ R <0.5 × D1, the upper plate portion 42b includes the circular arc portion 42b1 and a flat smooth portion 42b2 that forms the top of the upper plate portion 42b, as in this example. Formed from.

  Further, in the present embodiment, a reinforcing thick portion 42a1 extending continuously in the circumferential direction is formed on the outer peripheral surface of the body portion 42a at the lower end thereof, and the inner lid is formed on the inner peripheral surface thereof. An engagement protrusion 42a2 that engages with a shallow circumferential locking groove 44 provided on the fitting surface 38 protrudes.

  As described above, the inner lid 34 of this example has the upper plate portion 42b having a substantially hemispherical shape, and is provided with a thick portion 42a1 for reinforcement extending continuously in the circumferential direction at the lower end portion of the body portion 42a. Therefore, when the inner lid body 42 is filled with compressed air, as shown in FIG. 5, the inner lid 34 is deformed to spread laterally from the arc portion 42b1 to the upper end side of the trunk portion 42a. In addition, since the lower end side of the body portion 42a is reinforced and tagged by the thick portion 42a1, it is difficult to spread laterally. Therefore, a gap is less likely to occur between the trunk portion 42a and the inner lid fitting surface 38 during filling with compressed air. Therefore, when a gap is generated, it is possible to suppress the internal pressure in the bottle container 3 from rising due to the air leaking from the air and preventing the inner lid 34 from coming off from the boss portion 36B.

  Next, in the cap unit 2 of this embodiment, when the inner lid 34 does not come off from the boss portion 36B due to the pressure of the compressed air, the plug portion 43 of the inner lid 34 is pushed upward by force and forced. Auxiliary removal means 45 is provided to be removed.

  As shown in FIGS. 6 (A) and 6 (B), the auxiliary detaching means 45 is connected to the lower end of the vertical flow path portion 32A and extends to a lower opening 46a that opens on the bottom surface 33S side of the cap body 33. The extended flow passage portion 46 extending in a straight line with the vertical flow passage portion 32A, and is held in the extended flow passage portion 46 so as to be slidable up and down, and by sliding upward, the plug portion And a push shaft 47 that can push up 43.

  Specifically, the push shaft 47 is inserted into the extended flow path portion 46 in an airtight manner via an O-ring, and the insertion portion 49 is connected to the insertion portion 49 and protrudes downward from the lower opening 46a. And a protruding portion 50. The push shaft 47 pushes the lower end of the plug part 43 upward with the lower end YL (shown in FIG. 6A) whose upper end is lower than the lower end Q of the vertical flow path portion 32A. Then, it can move up and down between the raised position YU (shown in FIG. 6B) where the inner lid 34 is removed. At the lower end of the push shaft 47, a lever 51 that pushes the push shaft 47 upward by manual operation is disposed, and the bottom plate portion 35 of the cap body 33 has a lower end of the push shaft 47 at the lowered position YL. A stopper 52 is formed in contact with the portion. The protruding portion 50 is provided with a spring means 53 that urges the push shaft 47 downward to return to the lowered position YL.

  Here, in the auxiliary removing means 45, it is not necessary to completely push out the plug portion 43 from the vertical flow path portion 32A by the push shaft 47, and the fitting between the inner lid 34 and the boss portion 36B is loosened. In this example, it is sufficient to disengage the engaging protrusion 42a2 from the locking groove 44. Therefore, in this example, the distance by which the plug portion 43 is pushed up by the push shaft 47 is about 1 to 5 mm, and after the fitting is loosened, the inner lid 34 is removed from the boss portion 36B by the pressure of compressed air.

  Next, the air supply port 31 b of the cap body 33 opens at the tip of a connection nozzle 55 that is directly connected to a fitting recess 54 provided in the compressor 5.

  As shown in FIGS. 7 and 8, the fitting recess 54 provided in the compressor 5 is electrically connected to a compressed air supply passage 61 extending from a cylinder pump 60 for forming compressed air in the compressor 5. The fitting concave portion 54 has front and rear tapered surface portions 54B and 54C formed in a tapered cone shape toward the cylinder pump 60 before and after the parallel hole portion 54A having a constant inner diameter.

  The connecting nozzle 55 includes a tapered cone-shaped tapered surface portion 55B on the tip side of the parallel nozzle body 55A, and the outer periphery of the nozzle body 55A is between the inner peripheral surface of the fitting recess 54. An O-ring 65 to be sealed is attached. In this example, the O-ring 65, which is a consumable item, is arranged on the cap body 33 side, so that the compressor 5 can be used repeatedly without maintenance.

  The tapered surface portion 54C after the fitting recess 54 has substantially the same inclination as the tapered surface portion 55B. When the connecting nozzle 55 is inserted into the fitting recess 54, the tapered surface portion 55B is received and held concentrically. It functions as a receiving surface.

  The cap body 33 is provided with a pair of locking claws 62 on both sides (in this example, upper and lower sides) of the connection nozzle 55, and the compressor 5 is in a position facing the locking claws 62. By engaging with the locking claw 62, a claw engaging hole 63 for fixing the compressor 5 and the bottle unit 4 in the directly connected state is formed.

  The locking claw 62 has a right triangular hook portion 62B protruding outward from the tip of the main portion 62A extending in parallel with the connection nozzle 55 from the cap body 33. The claw engaging hole 63 has a rectangular hole shape in the present example in which the locking claw 62 is inserted, and is engaged with the hook portion 62B at its upper and lower edges to be prevented from coming off. The locking claw 62 and the cap main body 33 are formed as an integrally molded body made of plastic such as nylon, polypropylene, or polyethylene, or reinforced plastic obtained by blending short fibers such as glass fiber with these. Further, in this example, the claw engagement hole 63 is formed by a frame frame 64 supported by the fitting recess 54. The frame frame 64, the fitting recess 54, and the cylinder pump 60 are, for example, It is formed as an integrally formed body made of a lightweight alloy such as a zinc alloy or an aluminum alloy.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 1 Cap unit 3 Bottle container 7 Mouth part 5 Compressor 31 Air flow path 31a Air intake port 32 Sealing agent and compressed air extraction flow path 32a Sealing agent and compressed air extraction port 32A Vertical flow path part 32b Sealing agent and compressed air discharge port 32B Horizontal channel portion 33 Cap body 33S Bottom surface 34 Inner lid 36A Mouth mounting recess 36B Boss portion 38 Inner lid fitting surface 42 Inner lid body 42a Body portion 42b Upper plate portion 43 Plug portion 45 Auxiliary removal means 46 Extended flow Road part 46a Lower opening 47 Push shaft 48 O-ring 49 Insertion part 50 Projection part 53 Spring means Q Lower end YL Lowering position YU Ascending position

Claims (4)

The puncture sealing agent and the compressed air are attached to the mouth of the bottle container containing the puncture sealing agent, the compressed air from the compressor is sent into the bottle container, and the puncture sealing agent and the compressed air are sent from the bottle container by feeding the compressed air. Cap body with sealing agent and compressed air take-out flow path to be taken out sequentially,
And a cap unit comprising an inner lid for closing the air flow path and the sealing agent / compressed air take-out flow path,
The cap main body has a mouth mounting recessed portion for inserting and fixing the mouth portion of the bottle container at an upper end portion, and an inner lid that rises from the bottom surface of the mouth mounting recess and has the inner lid fitted on the outer peripheral surface. It has a boss part as a fitting surface,
Moreover, an air intake opening that forms one end of the air flow path and a sealing agent / compressed air discharge opening that forms one end of the sealing agent / compressed air discharge flow path are opened inside the inner lid fitting surface. ,
The inner lid has an inner lid body in which an upper end of a cylindrical trunk portion fitted on the inner lid fitting surface is closed by an upper plate portion,
And the inner lid body is provided for removing the inner lid from the boss portion by the pressure of compressed air flowing into the inner lid body from the air intake port, and projects downward from the upper plate portion and the sealing And a plug body portion that is inserted into the agent / compressed air outlet and closes the sealing agent / compressed air outlet,
When the inner lid does not come off the boss portion due to the pressure of the compressed air, the cap body is provided with auxiliary removing means for manually pushing up the plug portion of the inner lid and removing the inner lid from the boss portion. Cap unit characterized by that. The sealing agent / compressed air take-out flow path is bent at a vertical flow path portion extending downward from the sealing agent / compressed air take-out port, and a lower end of the vertical flow path portion, and the sealing agent / compressed air take-out flow path. In addition to forming an L-shape consisting of a horizontal flow path part extending horizontally to the sealing agent / compressed air discharge port forming the other end of
The auxiliary detachment means is connected to the lower end of the vertical flow path portion, and the extended flow path portion extends in a straight line from the vertical flow path portion to the lower opening that opens on the bottom surface side of the cap body. 2. The cap unit according to claim 1, further comprising a push shaft that is slidably held in the extended flow path portion and can push up the plug body portion by sliding upward. The push shaft includes an insertion portion that is airtightly arranged in the extension channel portion via an O-ring, and a protruding portion that continues to the insertion portion and projects downward from the lower opening,
Moreover, the push shaft can move between a descending position whose upper end is lower than the lower end of the vertical flow path portion and an elevated position where the lower end of the plug body portion is pushed upward to remove the inner lid. 3. The cap unit according to claim 2, wherein a spring means for urging the push shaft downward to return to the lowered position is provided at the projecting portion. The cap unit according to claim 3, wherein a distance by which the push shaft pushes up the plug body portion is 1 to 5 mm.

Images