JP2008062971A - Cap with packing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap with a packing, which is achieved by a simple structure without a cost increase nor a size increase for maintaining a sufficient and stable air tightness even for a container body without high shape precision owing to an inner pressure applied. <P>SOLUTION: In structuring a cap 1 with a packing, which has a cap body 2 threadedy attached and detached relative to the opening Co of a container body C, and a ring-shaped sealing packing 3 stored inside the body 2, and positioned between the end Cos of the opening Co and the inside face of the cap body 2 when the main body 2 is mounted on the opening Co, an inside face 2ui of the top wall part 2u of the cap body 2 is formed integrally with a first ring-shaped regulating ridge 4 with a triangular cross section, extended in the ring direction of the packing 3, and abutting on an upper end face 3u of the packing 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cap body that is attached to and detached from a mouth portion of a liquid storage tank that stores liquid, and a cap with packing that has a packing that is stored inside the cap body.

  In general, a cooling device disclosed in Japanese Patent Application Laid-Open No. 2005-282935 is known as a cooling device that performs cooling by circulating a coolant through an object to be cooled such as a semiconductor processing apparatus. The cooling device has a function of cooling the coolant to be cooled by supplying the coolant to the object to be cooled after the coolant stored in the coolant tank is sent out by the liquid feed pump and cooled by the cooling unit having the heat exchanger. The coolant after cooling the object to be cooled is returned to the coolant tank again.

  By the way, this type of cooling device is equipped with a cooling liquid tank (container) for storing the cooling liquid, and this cooling liquid tank usually has a mouth portion for performing internal cleaning and the like. A cap to be attached to and detached from the part is provided (see FIG. 5). And since a cap for such an application needs to ensure airtightness, a cap main body that is attached to and detached from the mouth of the coolant tank by a screw form, and the cap main body is accommodated inside the cap main body. It is provided with a ring-shaped packing that is interposed between the tip of the mouth and the inner surface of the cap body when attached to the mouth.

Conventionally, as a cap provided with such a packing (cap with packing), a cap disclosed in JP-A-2003-237813 is known. This cap is provided with an intermittent contact ring that presses the packing on the inner surface of the top wall of the cap for the purpose of preventing the internal pressure of the container from rising abnormally and maintaining good airtightness at room temperature. A center boss for regulating the displacement of the packing is provided inside the intermittent contact ring.
JP 2005-282935 A Japanese Patent Laid-Open No. 2003-237813

  However, the above-described conventional cap (cap with packing) has the following problems to be solved.

  First, in the case of a container body such as a cooling liquid tank, since a liquid feed pump is connected and used in a closed loop, it is possible to ensure airtightness in a state where an internal pressure (about 0.1 [MPa]) is applied. Required. On the other hand, this type of coolant tank is not simple in shape as a whole and is usually manufactured by blow molding, so high shape accuracy cannot be obtained. After all, even if a packing for sealing is used, it is not easy to ensure sufficient and stable airtightness.

  Secondly, there are various methods (structures) for securing airtightness. For example, if a double-triple airtight structure is adopted, the desired airtightness can be secured, but the cost ( This leads to an increase in component cost and manufacturing cost) and an increase in size. After all, when securing sufficient airtightness is considered, there is a limit to cost reduction and miniaturization realized by a simple structure.

  The object of the present invention is to provide a cap with packing that solves the problems in the background art.

  The present invention includes a cap main body 2 that is attached to and detached from the mouth portion Co of the container body C in a screw form, and the cap body 2 is accommodated in the mouth portion Co when the cap body 2 is accommodated in the cap body 2 and attached to the mouth portion Co. When the cap 1 with packing having the ring-shaped packing 3 interposed between the tip portion Cos and the inner surface of the cap body 2 is configured, the inner surface 2ui of the top wall portion 2u of the cap body 2 is placed on the packing 3 A ring-shaped restricting protrusion (first restricting protrusion) 4 which is in contact with the end surface 3u and has a triangular mountain cross section along the ring direction of the packing 3 is integrally formed. To do.

  In this case, according to a preferred aspect of the invention, the inner surface 2ui of the top wall portion 2u of the cap body 2 is engaged with the inner peripheral surface 3i of the packing 3 on the inner side of the first regulating protrusion 4. The position of the packing 3 can be regulated, and the ring-shaped second regulating protrusion 5 along the ring direction of the packing 3 can be integrally formed. Further, a float switch 6 for detecting the amount of the liquid W stored in the container body C can be provided on the top wall 2u of the cap body 2. The container body C can include a liquid storage tank T that includes at least an inlet Ti and an outlet To of the liquid W and is connected to the liquid feeding pump 7.

  The cap with packing 1 according to the present invention having such a configuration has the following remarkable effects.

  (1) A ring-shaped first regulation that abuts the inner surface 2ui of the top wall portion 2u of the cap body 2 with the upper end surface 3u of the packing 3 and has a triangular mountain cross section along the ring direction of the packing 3. Since the protrusion 4 is integrally formed, for example, an internal pressure is applied, and even the container body C that cannot obtain high shape accuracy can ensure sufficient and stable airtightness.

  (2) Since it is sufficient to integrally form the first regulating protrusion 4 on the inner surface 2ui of the top wall 2u of the cap body 2, it has a simple structure that does not increase cost (part cost and manufacturing cost) or increase in size. While being able to implement, the airtightness at the time of mounting | wearing can be improved, ensuring the ease of handling.

  (3) According to a preferred embodiment, the packing 3 is an inner surface 2ui of the top wall portion 2u of the cap body 2 and is engaged with the inner peripheral surface 3i of the packing 3 inside the first regulating protrusion 4. If the second regulating protrusion 5 along the ring direction of the packing 3 is integrally formed, the first regulating protrusion 4 with the packing 3 held at a fixed position on the inner surface 2ui. Therefore, sufficient and stable airtightness can be ensured.

  (4) If the float switch 6 for detecting the amount of the liquid W accommodated in the container body C is provided on the top wall 2u of the cap body 2 according to a preferred embodiment, the function of supporting (attaching) the float switch 6 is also used. By doing so, the maintainability of the float switch 6 can be improved.

  (5) According to a preferred embodiment, if the container body C includes a liquid storage tank T that includes at least an inlet Ti and an outlet To of the liquid W and is connected to the liquid feed pump 7, this type of liquid storage tank It can be provided as a cap 1 with packing that is optimal for T.

  Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

  First, the structure of the cap 1 with packing which concerns on this embodiment is demonstrated with reference to FIGS.

  The embodiment illustrates a liquid storage tank T shown in FIG. 5 as the container body C using the cap 1. Accordingly, the cap 1 is attached to and detached from the mouth portion Co provided in the liquid storage tank T. In this case, the liquid storage tank T includes a tank main body portion 21 and has a relatively large-diameter mouth portion Co on the upper surface portion of the tank main body portion 21. The mouth portion Co protrudes upward from the upper surface of the tank body 21 and has a male screw portion 22 on the outer peripheral surface. In addition, at the lower end of the side surface portion of the tank main body portion 21, there is an outlet To through which liquid (cooling liquid or the like) W stored in the tank main body portion 21 flows out, and a mouth portion Co on the upper surface portion of the tank main body portion 21. Next to is an inlet Ti where the liquid W flowing out from the outlet To is returned. In addition, Ts indicates a supply port for additionally supplying the liquid W into the liquid storage tank T, and Td indicates a discharge port for discharging the liquid W in the liquid storage tank T. The liquid storage tank T is integrally formed of a plastic material (for example, HDPE resin). In addition, the blow molding method can be used for the shaping | molding in this case.

  On the other hand, the cap 1 according to the present embodiment includes, as a basic form, a cap main body 2 that is attached to and detached from the mouth portion Co of the liquid storage tank T by a screw form, and the cap main body 2 that is accommodated in the cap main body 2 and is opened. A ring-shaped packing 3 is provided for sealing between the front end portion Cos of the mouth portion Co and the inner surface of the cap body 2 when mounted on the portion Co.

  The cap main body 2 has a circular top wall 2u and a side wall 2s extending downward from the periphery of the top wall 2u in a cylindrical shape. As with the liquid storage tank T, the entire cap body 2 is integrally formed of a plastic material (for example, POM resin). In this case, an injection molding method can be used for the molding. Further, as shown in FIG. 4, a plurality of non-slip protrusions 23 are formed on the outer peripheral surface of the side wall portion 2s at regular intervals in the circumferential direction to prevent slipping when the cap 1 is rotated. On the inner peripheral surface of the portion 2s, a female screw portion 24 that is screwed into the male screw portion 22 formed on the outer peripheral surface of the mouth portion Co described above is formed. Further, an attachment hole 25 for attaching a float switch 6 described later is formed at the center position of the top wall 2u. The above configuration is a basic form of the cap body 2.

  The packing 3 is formed in a ring shape as a whole using, for example, CR rubber or the like, and the cross section is formed in a flat rectangle as shown in FIG. Thereby, when the packing 3 is accommodated in the cap body 2, as shown in FIG. 3, the upper end surface 3u of the packing 3 is in surface contact with the inner surface 2ui of the top wall portion 2u, and the lower end surface 3d is the mouth portion. Surface contact (or line contact) is made with the Co tip portion Cos. Further, the outer peripheral surface 3 o of the packing 3 abuts on the inner peripheral surface of the side wall 2 s of the cap body 2.

  On the other hand, on the inner surface 2ui of the top wall portion 2u of the cap body 2, a ring-shaped restriction ridge (first restriction ridge) 4 that is in contact (pressure contact) with the upper end surface 3u of the packing 3 is integrally formed. The first regulating protrusion 4 is concentric with the top wall 2u and is provided along the ring direction of the packing 3 to be accommodated. In this case, it is desirable that the position of the first regulating protrusion 4 with respect to the upper end surface 3 u of the packing 3 is positioned at the radial center of the upper end surface 3 u of the packing 3. As shown in FIG. 1, the first regulating protrusion 4 has a triangular mountain cross section and protrudes downward from the inner surface 2ui of the top wall 2u. As an example, when the outer diameter La of the packing 3 is about 60 [mm], the width Lw of the packing 3 (packing body) is about 9 [mm], and the thickness Lh of the packing 3 is about 6 [mm], a triangular mountain It is desirable to select the apex angle Rp of the first restricting ridge 4 to be approximately 60 [°] and the protrusion length Lp of the first restricting ridge 4 to be approximately 0.5 [mm].

  Moreover, it is the inner surface 2ui of the top wall part 2u of the cap main body 2, Comprising: The position of the said packing 3 latched by the inner peripheral surface 3i of the packing 3 accommodated in the 1st control protrusion part 4 inside. And a ring-shaped second regulating protrusion 5 along the ring direction of the packing 3 is integrally formed. The second restriction protrusion 5 is concentric with the first restriction protrusion 4. As shown in FIG. 1, the second regulating protrusion 5 has a rectangular cross section and protrudes downward from the inner surface 2ui of the top wall 2u.

  Next, an assembling method, a function, and a usage method of the cap 1 according to the present embodiment will be described with reference to FIGS.

  When the cap 1 is assembled, the cap body 2, the packing 3, and the float switch 6 shown in FIG. 5 are prepared. The float switch 6 is for detecting the amount of the liquid W contained in the container body C, and has a bolt portion 31 inserted into the mounting hole 25 of the top wall portion 2u at the upper end portion. A fixing nut portion 32 and an O-ring 33 that are interposed between the float switch 6 and the top wall portion 2u are attached.

  First, as shown in FIG. 3, the packing 3 is accommodated in the cap body 2. At this time, the upper end surface 3u of the packing 3 is brought into contact with the inner surface 2ui of the top wall portion 2u, and the outer peripheral surface 3o of the packing 3 is brought into contact with the inner peripheral surface of the side wall portion 2s of the cap body 2. As a result, the first restriction protrusion 4 protruding from the inner surface 2ui of the top wall 2u is pressed against the upper end face 3u of the packing 3, and the second restriction protrusion 5 is locked to the inner peripheral surface 3i of the packing 3. Thus, the packing 3 is regulated (held) at a fixed position.

  Next, the bolt portion 31 of the float switch 6 is inserted into the mounting hole 25 of the top wall portion 2u from below, and the fixing nut portion 32 is screwed onto the bolt portion 31 protruding above the top wall portion 2u. Fix it. Thereby, the float switch 6 can be attached to the cap 1, and the float switch 6 protrudes downward from the top wall 2u. If the float switch 6 is provided on the cap 1, it is possible to improve the maintainability of the float switch 6 by using the support (attachment) function of the float switch 6.

  Then, the cap 1 assembled in this way is attached to the mouth portion Co in the liquid storage tank T. As shown in FIG. 5, the cap 1 is mounted by housing the float switch 6 from the mouth portion Co into the tank body 21, and the female screw portion 24 on the cap 1 side and the male screw portion 22 on the mouth Co side. Screw on. In this case, the cap 1 is rotated, and sufficient tightening is performed using the non-slip protrusions 23 formed on the outer peripheral surface of the cap 1.

  At this time, the lower end surface 3d of the packing 3 contacts the tip portion Cos of the mouth portion Co, and the packing 3 is interposed between the tip portion Cos of the mouth portion Co and the inner surface 2ui of the top wall portion 2u. As a result, a force in the twisting direction (spiral direction) acts on the packing 3. Thereby, since the 1st control protrusion 4 which becomes a triangular mountain shape bites into the upper end surface 3u of the packing 3, the packing 3 tends to be displaced along the 1st control protrusion 4 (regulated). Therefore, even when the tank main body 21 is manufactured by blow molding and high shape accuracy cannot be obtained, unnecessary positional deviation and deformation of the packing 3 are avoided by the first regulating protrusion 4, and a stable state is achieved. It is sealed with a sufficient airtightness.

  In addition, at this time, the inner peripheral surface 3i of the packing 3 is locked to the second restricting protrusion 5 and the packing 3 is held (restricted) in a fixed position. Accordingly, the upper end surface 3u of the packing 3 is also pressed against the first restricting protrusion 4 while being held at a fixed position, and the restriction by the first restricting protrusion 4 is performed. Sex can be secured.

  On the other hand, the liquid storage tank T provided with the cap 1 can be used for the cooling device 50 shown in FIG. The cooling device 50 connects the liquid feed pump 7 to the outlet To of the liquid storage tank T, and this liquid feed pump 7 is connected to the inflow portion of the object 61 to be cooled such as a semiconductor processing apparatus via the heat exchanger 52. To do. Further, the outflow portion of the object to be cooled 61 is connected to the inflow port Ti of the liquid storage tank T. A cooler unit 53 is connected to the heat exchanger 52. Thereby, since the circulation circuit of the liquid W stored in the liquid storage tank T is configured, if the liquid feed pump 7 is operated, the liquid (cooling liquid) W stored in the liquid storage tank T is discharged from the outlet. It is sent out from To and cooled by the heat exchanger 52. That is, since the cooling medium cooled from the cooler unit 53 is supplied to the heat exchanger 52, heat exchange with the coolant W is performed. Then, the cooled coolant W is supplied to the object 61 to be cooled, and the object 61 is cooled, and the coolant W used for cooling is returned from the inlet Ti to the liquid storage tank T.

  According to such a cap 1 according to the present embodiment, the inner surface 2ui of the top wall 2u of the cap body 2 is in contact with the upper end surface 3u of the packing 3, and the cross section along the ring direction of the packing 3 has a cross section. Since the ring-shaped first regulating protrusion 4 having a triangular mountain shape is integrally formed, for example, even in the case of the container body C to which internal pressure is applied and high shape accuracy cannot be obtained, sufficient and stable airtightness Can be secured. Moreover, since it is sufficient to integrally form the first regulating protrusion 4 on the inner surface 2ui of the top wall 2u of the cap body 2, it is implemented with a simple structure that does not increase cost (part cost and manufacturing cost) or increase in size. In addition, the airtightness at the time of mounting can be enhanced while ensuring the ease of handling. In particular, a cap 1 with packing that is optimal for this type of storage tank T is provided by using the storage tank T that has an inlet Ti and an outlet To of the liquid W and that is connected to the liquid feed pump 7. Can do.

  Although the best embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the detailed configuration, shape, quantity, numerical value, and the like do not depart from the spirit of the present invention. It can be changed, added, or deleted arbitrarily.

  For example, although the case where only one first regulating protrusion 4 is provided, two or more may be provided as necessary. Moreover, although the case where the cross-sectional shape of the 1st control protrusion part 4 was formed in the triangular mountain shape was shown, the triangular mountain shape does not mean only a regular triangle like illustration but a triangle is partially Deformation forms that exhibit the same function, such as a pentagon and a shape with rounded apexes, are also included in the triangular mountain shape. Similarly, the cross-sectional shape (overall shape) of the second regulating protrusion 5 is not necessarily limited to the illustrated form, and includes a modified form having the same function. The float switch 6 is not necessarily provided on the cap 1. Furthermore, although the liquid storage tank T was illustrated as the container body C, various container bodies C, such as bottles and cases, can be applied.

Sectional front view including a partially extracted enlarged view of the packing and cap body used for the cap with packing according to the best embodiment of the present invention, Bottom view of the cap body in the same cap with packing, A cross-sectional front view showing a state in which the cap with packing is attached to the mouth, External front view of the cap with packing, A circuit diagram of a cooling device using a liquid storage tank having the cap with the packing,

Explanation of symbols

  1: cap with packing, 2: cap body, 2u: top wall of cap body, 2ui: inner surface of top wall, 3: packing, 3u: upper end surface of packing, 3i: inner peripheral surface of packing, 4: first 1 regulation ridge, 5: second regulation ridge, 6: float switch, 7: liquid feed pump, C: container body, Co: mouth of container body, Cos: tip of mouth, W: liquid , T: Liquid storage tank, Ti: Inlet, To: Outlet

Claims (4)

  A cap body that is attached to and detached from the mouth portion of the container body with a screw, and when the cap body is housed in the cap body and the cap body is attached to the mouth portion, between the distal end portion of the mouth portion and the inner surface of the cap body. In a cap with packing having a ring-shaped packing for intervening sealing, the inner surface of the top wall portion of the cap body is in contact with the upper end surface of the packing and has a triangular cross section along the ring direction of the packing A cap with packing, which is formed by integrally forming a ring-shaped restriction protrusion (first restriction protrusion) having a mountain shape.   The inner surface of the top wall portion of the cap body, the inner surface of the packing is locked to the inner peripheral surface of the packing, and the packing ring direction. The cap with packing according to claim 1, wherein a ring-shaped second regulating protrusion along the line is integrally formed.   The cap with packing according to claim 1 or 2, wherein a float switch that detects an amount of liquid stored in the container body is provided on a top wall portion of the cap body.   The cap with packing according to claim 1 or 3, wherein the container body is a liquid storage tank having at least a liquid inlet and an outlet and connected to a liquid feed pump.

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