JP6842114B2 - cock - Google Patents

Description

The present invention relates to a cock attached to a liquid storage container and configured to be able to switch between an open state and a closed state by operating a handle.

The applicant has already applied for a cock attached to a liquid storage container such as a back-in box, which is provided with a mechanism for preventing the content liquid from flowing out due to a malfunction (see Patent Document 1).

More specifically, the cock has an outer cylinder having both ends open and an outer communication hole formed on the side surface to communicate with the inside of the liquid storage container, and the cock can rotate in the circumferential direction with respect to the outer cylinder. It has an inner cylinder that is inserted into. That is, the inner cylinder body is rotated by the handle to communicate the inner communication hole formed on the side surface thereof with the outer communication hole, so that the content liquid can be led out from the tip side to the outside. Has been done.

Further, the cock includes a lid that is integrally connected to the tip of the outer cylinder by a hinge, and a fixing protrusion that projects from the inner top surface of the lid toward the opening side. The fixing protrusion is configured to engage with the tip end portion of the inner cylinder in a fully closed state in which each communication hole is on the opposite side while being covered. That is, since the hinge and the fixing protrusion prevent the inner cylinder from rotating when the lid is closed, it is possible to prevent the communication holes from being erroneously communicated with each other and spilling the content liquid due to a malfunction.

By the way, there is an increasing demand for a cock provided with such a malfunction prevention mechanism to be further provided with a mechanism for proving that it is unused and unopened.

As an unopened certification mechanism used for purposes other than cocks, for example, one provided with a proof ring used for PET bottles for beverages and the like is known.

More specifically, such an unopened certification mechanism includes a proof ring provided on a PET bottle and fitted to the outer peripheral surface of a spout for pouring the content liquid to the outside, and the proof ring and the spout. It is provided with a connecting portion that brokely connects the cap screwed to the outer peripheral surface.

Therefore, in the unopened certification mechanism, the proof ring is restricted from moving in the axial direction of the spout. Therefore, by turning the cap to move the proof ring outward in the axial direction, the connecting portion Is broken and the cap and the proof ring are separated.

Therefore, if the unopened proof mechanism as described above is attached to the tip side of the cock, which is a portion corresponding to the spout of the PET bottle, the unopened proof function can be easily given to the cock. Seems to be.

However, when an unopened proof mechanism by a proof ring is to be provided for the cock described in Patent Document 1, the lid must be configured to separate the hinge which is the connecting portion with the outer cylinder. Then, even if there is the fixing protrusion, the rotation of the inner cylinder is not hindered, and the function of preventing the content liquid from leaking due to the malfunction is lost.

Japanese Unexamined Patent Publication No. 2016-023792

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cock having an unopened proof function and capable of preventing the conventional function from being disturbed.

That is, the cock according to the present invention is a cock that is attached to a liquid storage container and leads out the content liquid of the liquid storage container to the outside, and is connected to an outer cylinder having both ends open and the outer cylinder. An outer communication hole formed by penetrating the side surface of the outer cylinder and communicating with the inside of the liquid storage container, and an opening on the tip side are provided. An inner cylinder that is rotatably fitted inside the outer cylinder in the circumferential direction, an inner communication hole formed by penetrating the side surface of the inner cylinder, and the inner cylinder. An open state in which the outer communication hole and the inner communication hole communicate with each other by being rotated in the circumferential direction together with the inner cylinder, or the outer communication hole and the inner communication hole are communicated with each other. A cock that is provided with a handle that can be switched to either a closed state in which the holes do not communicate with each other and that draws out the content liquid from the tip side to the outside, and only when a part of the cock is broken. An unopened certification mechanism configured to allow the handle to rotate from the closed state to the open state is further provided, and the unopened certification mechanism is formed between the main body and the handle. It is characterized by being.

According to the cock according to the present invention, since the unopened certification mechanism is formed between the main body and the handle, even if the unopened certification function is added, for example, the outer cylinder and the inner cylinder The function of the lock mechanism for preventing malfunctions provided on the tip side of the device is not impaired.

Further, since the unopened proof mechanism is formed between the main body and the handle, the degree of freedom in designing the unopened proof mechanism is high, and when the unopened proof mechanism is grasped by hand and broken, the unopened proof mechanism can be used. It is easy to make a shape that can exert sufficient force to break it.

Further, according to the cock according to the present invention, the handle can be rotated from the closed state to the open state only after a part of the unopened certification mechanism is broken. Therefore, when the handle is unopened, the handle can be rotated. It is possible to prevent the contents liquid of the liquid storage container from leaking without accidentally rotating to the open state.

As a result, according to the present invention, it is possible to realize the locking function regardless of whether it is before or after opening.

As a specific embodiment of the cock, the unopened certification mechanism is provided at a predetermined distance from the outer cylinder, and the first end portion is in the circumferential direction or the tangential direction of the outer cylinder. The grip piece extending in the direction, the outer cylinder body and the grip piece are connected to each other, the outer cylinder body and the breaking structure having a strength lower than that of the grip piece, and the handle formed in contact with the grip piece. Circumferential direction or tangent line of the outer cylinder so that the breaking structure is provided with an engaging protrusion and opens to the first end face and the second end face facing each other, the first end face, and the second end face. A groove formed along the direction and a thin-walled portion formed on the bottom side of the groove are provided so that a parting line is formed at least on the surface of the outer cylinder along the axial direction thereof. The outer cylinder, the gripping piece, and the broken structure are integrally resin-molded, and the first end surface of the broken structure is an end face located near the first end of the gripped piece. When viewed from a direction perpendicular to the parting line, the first end portion of the gripping piece and the first end surface of the broken structure are on the same side with respect to the parting line. It can be mentioned that it is composed of.

According to the cock configured in this way, it is possible to prevent the broken structure from becoming difficult to break even if the production by resin molding using the mold is repeated. The reason is as follows.

For example, in resin molding in which a plurality of dies are brought into contact with each other and a product having a predetermined shape is mass-produced by a cavity formed between the dies, the dies having a parting line formed on the surface of the product are formed. At the boundary surface, a gap is inevitably formed between the molds, so that burrs are generated on the surface of the product even if the molds are not deteriorated.

Further, by repeating the resin molding, the boundary surface where the molds come into contact with each other is gradually scraped, and the shape of the mold changes.

Therefore, as described above, if the surfaces of the molds that come into contact with each other are scraped due to aged deterioration, large burrs are likely to occur on the boundary surface, or the product may be formed larger than the desired thickness. ..

In the case of the cock according to the present invention, even when manufactured by resin molding, the first end surface is not formed on the parting line and is not located at the boundary surface between the molds described above. It is possible to prevent the groove opened in the first end surface of the fractured structure from being blocked due to a shape change or burr due to aged deterioration.

Further, since the first end portion of the gripping piece and the first end surface of the fractured structure are on the same side with respect to the parting line, for example, the first end portion of the gripping piece is grasped and said. When the outer cylinder is pulled outward in the circumferential direction and the breaking structure is broken from the first end surface along the thin portion, the thin portion can be broken from the first end surface.

As long as the thin-walled portion of the first end surface that triggers the break can be broken, the crack generated in the first end surface can be propagated in the extending direction of the thin-walled portion without applying so much force.

When the cock as described above is manufactured by resin molding, the vicinity of the outer communication hole and the portion where the outer cylinder and the inner cylinder are in contact with each other are made liquidtight, and the unopened certification mechanism is used. In order to make it easy to remove from the mold even if it has a complicated shape, the main body is made of resin so that a parting line along the axial direction of the outer cylinder is not formed on the surface of the outer cylinder. A single mold region to be molded and a split mold region to be resin-molded so that a parting line along the axial direction of the outer cylinder is formed on the surface of the outer cylinder, and the grip The piece and the broken structure may be included in the divided type region.

When the handle is erroneously rotated, it is possible to avoid excessive torque generated by the engaging protrusions, reduce the risk of the fractured structure being broken or deformed, and after opening the package. In order to facilitate the rotation of the handle without interfering with the fractured structure, the handle is formed so as to extend radially outward of the outer cylinder, and the fractured structure is formed of the groove. The inner side wall which is the wall on the outer cylinder side and the outer wall which is the wall on the gripping piece side of the groove are provided, the engaging protrusion is on the inner peripheral side of the handle, and the fracture structure is broken. After that, it may be formed at a position where a predetermined gap is formed between the inner side wall and the inner side wall, or at a position where the inner side wall is in contact with only the outer peripheral side portion.

To more reliably prevent the liquid content of the liquid storage container from leaking due to the rotation of the handle before opening, the cock rotates the handle 180 degrees from the closed state. It suffices that the gripping piece and the engaging protrusion are configured to be in the open state and are in contact with each other within a range in which the rotation angle of the handle is 0 degrees or more and 90 degrees or less. ..

In order to reduce the possibility that the cock is opened due to the broken structure being broken or deformed when a force for rotating the handle is accidentally applied during transportation or the like, the engagement is performed. The protrusion is configured to come into contact with the second end portion of the gripping piece, which is provided separately from the first end portion, from the inner peripheral side of the outer cylinder, and the unopened proof mechanism is provided. , It may be configured to further include a support column formed between the gripping piece and the outer cylinder.

In order to repeatedly fix the handle so that the handle does not rotate from the closed state to the open state even after the broken structure is broken in the cock, the outer cylinder is moved in the circumferential direction. A lid that is fixed so as not to rotate substantially and is configured to detachably close the opening on the tip side of the outer cylinder, and a movable portion formed at the tip of the inner cylinder. The cock may be further provided with an engaging structure including an engaging surface and a fixed engaging surface provided inside the lid.

In order to make it easier to prevent the inner cylinder from overcoming the fixed protrusion even if the inner cylinder rotates strongly, at least a part of the movable engaging surface is more than the tip of the outer cylinder on the tip side. It may be configured so that at least a part of the fixing protrusions is located inside the outer cylinder when it is located inside the outer cylinder and is covered by the lid.

According to the cock according to the present invention, since the unopened certification mechanism is formed on the base end side, there are few design restrictions on the tip side of the cock, and a complicated cap having various functions is provided. You can also do it. For example, not only the unopened proof function but also the lock function after opening can be realized as in the conventional case.

Further, the handle can be rotated from the closed state to the open state only after a part of the unopened certification mechanism is broken. Therefore, when a part of the unopened certification mechanism is not broken. Prevents the handle from accidentally rotating to the open state, and prevents the liquid content of the liquid storage container from leaking out.

In addition, while maintaining the strength of the unopened certification mechanism so that it cannot be easily broken by a relatively small torque generated by an impact during transportation or the like, it exerts sufficient force to break the unopened certification mechanism. It can be made into a size and shape that are easy to make.

The schematic perspective view which shows the whole cock in the closed state which concerns on one Embodiment of this invention. The schematic diagram which shows the cock in the closed state in this embodiment. The schematic diagram which shows the cock in the open state in this embodiment. The schematic diagram which shows the unopened proof mechanism in a closed state in this embodiment. The cross-sectional view which shows the mold used at the time of resin molding on the main body side in this embodiment. The schematic diagram which shows the parting line of the outer cylinder surface in this embodiment. The cross-sectional view which shows the mold used at the time of resin molding on the operation part side in this embodiment.

A cock according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the cock 100 according to the present embodiment is attached below a container made of plastic, PET, or the like, or a liquid storage container C such as an inner bag of a bag-in-box. ..

That is, the content liquid of the liquid storage container C is configured to be led out to the outside by its own weight via the cock 100. In FIG. 1, the lower left side in the drawing is set to be below the liquid storage container C so that the overall image of the cock 100 can be easily understood.

Further, the cock 100 realizes an unopened proof function in the upper portion on the base end side, prevents malfunction of the cock 100 in the lower portion on the tip end side, and prevents the contents liquid from being erroneously derived. A lock function is realized to prevent it.

First, the basic function as a cock and the part related to the unopened proof function formed in the upper part will be described. As shown in FIG. 1, the cock 100 has a main body MB attached so as to communicate with the inside of the liquid storage container C, and an operation unit rotatably inserted into the main body MB. It is composed of OP.

The main body MB is one in which each part constituting the main body MB is integrally resin-molded, and the operation part OP is one in which each part constituting the operation part OP is integrally resin-molded. is there.

The main body MB includes a mounting portion 1 formed in a substantially thick cylindrical shape to be mounted on the liquid storage container C, and an outer cylinder 2 provided so as to be orthogonal to the axial direction of the mounting portion 1. It is prepared.

As shown in FIG. 2 or 3, the outer cylinder 2 has a cylindrical shape with both ends open, and an outer communication hole 21 communicating with the inside of the liquid storage container C is provided at the center of the side surface thereof. It is formed by penetrating it. The mounting portion 1 is connected so as to surround the outer communication hole 21.

The opening at the tip of the outer cylinder 2 has a predetermined diameter so that the liquid content of the liquid storage container C does not flow out too much at one time due to its own weight.

As shown in FIG. 1, the operation unit OP includes an inner cylinder 3 fitted inside the outer cylinder 2 and a handle 4 provided on the base end side of the inner cylinder 3. It is a thing.

As shown in FIGS. 1 to 3, the inner cylinder 3 is thinner than the outer cylinder 2 and has a substantially cylindrical shape with only the tip side opened, and is circular with respect to the outer cylinder 2. It is fitted so as to be rotatable in the circumferential direction. Further, an inner communication hole 31 is penetrated through the central portion of the side surface of the inner cylinder 3.

The inner cylinder 3 has a ring-shaped protrusion 32 that partially protrudes in a ring shape in the radial direction on the outer peripheral surface of the base end portion, and the base of the outer cylinder 2 corresponds to the ring-shaped protrusion 32. A ring-shaped groove 22 is formed on the inner peripheral surface on the end side.

The inner cylinder 3 is inserted from the base end side opening of the outer cylinder 2, and the ring-shaped protrusion 32 and the ring-shaped groove 22 are engaged with each other to allow the outer cylinder 2 to the inner cylinder 2. 3 is prevented from coming off.

The handle 4 is a flat plate member extending in the radial direction at the base end portion of the inner cylinder 3, and the outer communication hole is formed by a user pinching the handle 4 and rotating the inner cylinder 3. The communication state between the 21 and the inner communication hole 31 can be switched.

In more detail, FIGS. 2 (a) and 3 (a) are cross-sectional views of the entire cock 100, and FIG. 2 (b) and FIG. 2 (b) are views showing only the operation unit OP of the cock 100. , FIG. 3 (b) will be described.

When the cock 100 is viewed from the upper side in FIG. 2 (a) and the character "closed" is visible as shown in FIG. 2 (b), the inner communication hole 31 of the inner cylinder 3 is , The outer cylinder 2 is located on the opposite side of the outer communication hole 21. Therefore, in this case, the outer communication hole 21 is closed by the outer surface of the inner cylinder 3, and the inner solution of the liquid storage container C does not flow into the cock 100.

On the other hand, the handle 4 is rotated 180 ° counterclockwise when viewed from the base end side in the circumferential direction, and the cock 100 is viewed from the upper side in FIG. 3 (a) as shown in FIG. 3 (b). When the character "open" is visible, the inner cylinder 3 is also rotated 180 ° in the circumferential direction, and the inner communication hole 31 of the inner cylinder 3 and the outer communication hole of the outer cylinder 2 are formed. The liquid storage container C communicates with the 21 so that the inner solution of the liquid storage container C flows into the cock 100 and is led out from the tip side thereof to the outside.

In this way, the handle 4 is in an open state in which the inner cylinder 3 is rotated in the circumferential direction so that the outer communication hole 21 and the inner communication hole 31 communicate with each other, and the outer communication hole 21 and the outer communication hole 21 and the said. It is configured so that it can be switched between a closed state in which the inner communication hole 31 does not communicate with the inner communication hole 31.

In addition to the above-described configuration, the cock 100 according to the present embodiment is formed between the outer cylinder 2 and the handle 4, and the handle 4 is opened from the closed state only when a part of the cock 100 is broken. It is further provided with an unopened proof mechanism 5 configured to be able to rotate to a state.

As shown in FIG. 4, the unopened certification mechanism 5 can break the gripping piece 51 that functions as a portion to be gripped by hand when breaking the unopened certification mechanism 5, and the gripping piece 51 and the main body MB. It is provided with a breaking structure 52 connected to the grip piece 51 and an engaging projection 53 that prevents the handle 4 from rotating by abutting against the gripping piece 51.

Note that FIG. 4A is a view of the unopened certification mechanism 5 as viewed from the base end side, and FIG. 4B is an axial front surface of the mounting portion 1 around the unopened certification mechanism 5. FIG. 4C is a view of the periphery of the unopened certification mechanism 5 as viewed from the tangential direction of the outer cylinder.

The gripping piece 51 and the breaking structure 52 are integrally formed with the outer cylinder 2, and the engaging protrusion 53 is integrally formed with the handle 4.

In this embodiment, the gripping piece 51 is provided outside the outer cylinder 2 in the radial direction by a predetermined distance, and the longitudinal direction of the face plate portion thereof is the outer cylinder 2 as shown in FIG. It is a plate-shaped member extending in the tangential direction of.

The plate-shaped grip piece 51 is formed so that the lateral direction of the face plate portion is parallel to the axial direction of the outer cylinder 2.

The gripping piece 51 includes a first end portion 511 and a second end portion 512, which are both ends in the longitudinal direction, and for example, the first end portion 511 is easily gripped by hand. 511 has a tangential length dimension of the outer cylinder 2 larger than that of the second end 512.

When the gripping piece 51 is viewed from the axial direction of the mounting portion 1, as shown in FIG. 4B, the end of the gripping piece 51 on the second end 512 side is the side surface of the outer cylinder 2. It is in a position that almost overlaps.

On the other hand, the end on the first end portion 511 side is located at a position separated from the side surface of the outer cylinder 2 to the outside by the diameter of the outer cylinder 2. Furthermore, the end of the first end portion 511 is arranged slightly inside the outer edge of the attachment portion 1 when viewed from the axial direction of the attachment portion. That is, by preventing the first end portion 511 from protruding significantly to the outside, for example, the first end portion 511 is less likely to be caught by something during transportation, and the fracture structure 52 is prevented from being accidentally broken. is there.

Further, in the grip piece 51, in the vicinity of the fracture structure 52, a columnar column 54 for connecting the grip piece 51 and the outer cylinder 2 is further provided.

As shown in FIG. 4C, the fracture structure 52 is formed on the first end surface 521 and the second end surface 522 facing each other in the tangential direction of the outer cylinder 2, and the first end surface 521 and the second end surface 522. A V-shaped groove 523 formed along the tangential direction of the outer cylinder 2 so as to open, a thin-walled portion 524 formed on the bottom side of the groove 523, and the outer cylinder 2 of the groove 523. It includes an inner side wall 525 forming a side surface and an outer wall 526 forming a surface of the groove 523 on the gripping piece 51 side.

As shown in FIG. 4A, the first end surface 521 is an end surface of the gripping piece 51 on the side close to the first end portion 511. On the other hand, the second end surface 522 is an end surface of the gripping piece 52 on the side close to the second end portion 512.

The inner side wall 525 is a trapezoidal columnar shape that looks trapezoidal when viewed from the tangential direction of the outer cylinder 2.

Further, the outer wall 526 is a triangular columnar shape that looks like a triangle when viewed from the tangential direction of the outer cylinder 2.

The thin-walled portion 524 is formed at a portion where the inner side wall 525 and the outer wall surface 526 are in contact with each other, and is a portion having the smallest wall thickness as compared with other portions.

Next, in the unopened certification mechanism 5, the gripping piece 51 and the broken structure 52 provided on the MB side of the main body are integrally resin-molded together with the outer cylinder 2 and the mounting portion 1. And the method will be explained.

As shown in FIG. 5, the main body MB has a single type region S in which a parting line P along the axial direction of the outer cylinder 2 is not formed on the surface of the outer cylinder 2 during resin molding. A divided type region M in which a parting line P is formed along the axial direction of the outer cylinder 2 is set on the surface of the outer cylinder 2.

The single mold region S is a portion formed by a single mold so that the boundary surface between the molds on which the parting line P is formed is not located in the axial direction of the outer cylinder 2. The portion set in the single type region S is a region in the cock 100 that forms, for example, a portion that engages with the operation portion OP or a portion that requires liquidtightness.

On the other hand, the split mold region M is formed by bringing two molds into contact with each other so that the boundary surface between the molds on which the parting line P is formed is located in the axial direction of the outer cylinder 2. It is the part to be done. The split mold region M is a region in the cock 100 that forms, for example, a portion of the cock 100 that is difficult to release from the mold with a single mold because of its complicated shape.

Specifically, as shown in FIG. 5A, in the main body MB, the inner side surface of the outer cylinder 2 and the vicinity of the outer communication hole 21 of the outer cylinder 2 are single. It is included in the type region S. Further, the base end portion of the outer cylinder 2, the gripping piece 51, and the fractured structure 52 are included in the split type region M.

As shown in FIG. 5 (b) which is a cross-sectional view taken along the line AA of FIG. 5 (a), 2 for forming the base end portion of the outer cylinder 2, the gripping piece 51, and the broken structure 52. The first split mold M1 and the second split mold M2, which are two molds, are arranged so as to abut each other from the radial direction of the outer cylinder 2. Therefore, as shown in FIG. 6, a parting line P along the axial direction of the outer cylinder 2 is formed on the surface of the outer cylinder 2 on the proximal end side.

Further, the first single mold S1 which is a mold for forming the vicinity of the outer communication hole 21 of the outer cylinder 2, the first split mold M1, and the second split mold M2 are described above. The outer cylinders 2 are arranged so as to be aligned in the axial direction and in contact with each other. Therefore, as shown in FIG. 6, a parting line P'along the circumferential direction of the outer cylinder 2 is formed on the surface of the outer cylinder 2.

The parting line P formed on the main body MB thus formed will be described with reference to FIG.

On the outer surfaces of the outer cylinder 2 and the gripping piece 51 included in the split type region M, for example, as shown in FIG. 6, the outer cylinder 2 is formed along the axial direction of the outer cylinder 2. A parting line P extending from the base end side to the tip end side of No. 2 is formed.

When the main body MB is viewed from a direction perpendicular to the axial direction of the outer cylinder 2, the breakage occurs with respect to the parting line P formed along the axial direction of the outer cylinder 2. The first end surface 521 of the structure 52 is configured to be on the same side as the first end portion 511 gripped by the user in the grip piece 51.

In the present embodiment, the entire fracture structure 52 is formed only by the first split type M1, and the first split type M1 has a tip for forming the groove 523 in a V shape. A sharp-shaped ridge M1a is formed. FIG. 5C is a view of the ridge portion M1a viewed from the tangential direction of the outer cylinder body 2.

The portion of the ridge portion M1a that forms the groove 523 that opens in the second end surface 522 is on the surface of the first division type M1 where the first division type M1 and the second division type M2 come into contact with each other. Designed to be located.

Therefore, even if the end face of the first split type M1 is scraped by repeatedly contacting the first split type M1 and the second split type M2 when the cock 100 is mass-produced, the first split type M1 is scraped. It is possible to suppress the shape change of the opening portion in the first end surface 521 in the groove 523 formed by the one-split type M1.

Next, a portion of the unopened certification mechanism 5 formed on the OP side of the operation unit will be described.

Of the unopened proof mechanism, the engaging projection 53 formed on the handle 4 is a plate that projects from the handle 4 toward the tip end side of the outer cylinder 2 along the axial direction of the outer cylinder 2. It is a shape.

The engaging protrusion 53 is on the inner peripheral side of the handle 4, and the end of the engaging protrusion 53 on the inner peripheral side of the handle 4 is the outer cylinder of the inner side wall 525 of the broken structure 52. It is formed so as to be on the outer peripheral side of the outer edge in the radial direction of 2.

The engaging projection 53 is formed so as to come into contact with the face plate portion on the outer cylinder 2 side of the second end portion 512 of the gripping piece 51 when the handle 4 is rotated.

The engaging protrusion 53 and the second end portion 512 of the gripping piece 51 are not in contact with each other in the closed state, and the handle 4 is rotated by 45 ° counterclockwise when viewed from the base end side. At that time, the engaging protrusion 53 and the second end portion 512 of the gripping piece 51 are brought into contact with each other.

Here, the structure and method for integrally resin-molding the engaging projection 53, the handle 4, and the inner cylinder 3 formed on the OP side of the operating portion of the unopened certification mechanism 5. explain.

As shown in FIG. 7A, even when the engaging protrusion 53, the handle 4, and the inner cylinder 3 are integrally resin-molded, the surface thereof is similar to the case where the main body MB is manufactured. A single type region S'where the parting line P along the axial direction of the outer cylinder 2 is not formed, and a split type region S'where the parting line P along the axial direction of the outer cylinder 2 is formed on the surface. M'and M'are set in the operation unit OP. FIG. 7 (b) is a view of FIG. 7 (a) from the proximal end side.

Of the surface of the inner cylinder 3, the outer surface on the tip side of the ring-shaped protrusion 32 is included in the single type region S', and the group including the ring-shaped protrusion 32 of the inner cylinder 3. The end side portion, the handle 4, and the engaging protrusion 53 are included in the split type region M'.

The third split mold M3 and the fourth split mold, which are molds for forming the base end side portion of the inner cylinder 3 including the ring-shaped protrusion 32, the handle 4, and the engagement protrusion 53. The M4 is arranged so as to be in contact with the top surface of the second single mold S2, which is a mold for forming the outer surface of the inner cylinder 3 on the tip side of the ring-shaped protrusion 32.

At this time, the length of the engaging protrusion 53 with respect to the axial direction is the distance from the front end side surface of the outer cylinder 2 of the handle 4 to the top surface of the second single type. It is set to be equal.

The operation for breaking the unopened certification mechanism 5 configured in this way and opening the cock 100 is as follows.

First, the user grasps the first end portion 511 of the gripping piece 51 and pulls the first end portion 511 outward in the radial direction of the outer cylinder 2, thereby causing the fracture structure 52 to be said. The thin-walled portion 524 on the first end surface 521 is cracked.

When the gripping piece 51 is further pulled up, a crack formed in the first end surface 521 causes the thin portion 524 from the first end surface 521 to the second end surface 522 of the fracture structure 52 along the groove 523. Extend towards.

When the crack reaches from the first end surface 521 to the second end surface 522, a force is applied to the support column 54 connecting the grip piece 51 and the outer cylinder 2 to break the crack.

In this way, the gripping piece 51 can be removed from the outer cylinder 2 together with the outer wall 526 of the fracture structure 52.

When the gripping piece 51 and the outer wall 526 of the fractured structure 52 are removed from the outer cylinder 2, the surface of the outer cylinder 2 is covered with the engaging projection 53 formed on the handle 4. Since only the inner side wall 525 of the fracture structure 52 that does not interfere remains, the handle 4 can be rotated to the open state.

According to the cock 100 configured in this way, the gripping piece 51, which is a portion to be gripped by the user when the unopened certification mechanism 5 is broken, has a plate shape extending in the tangential direction of the outer cylinder 2. Since the first end portion 511 is sufficiently separated from the outer surface of the outer cylinder 2, the first end portion 511 can be easily grasped.

Further, since the first end portion 511 is sufficiently separated from the outer surface of the outer cylinder body 2, the first end portion 511 is grasped and pulled up toward the outer side in the radial direction of the outer cylinder body 2. At that time, it is easy to exert a sufficient force to break the breaking structure 52.

Therefore, even if the breaking structure 52 is given a strength that does not break with a relatively weak force applied by an impact such as during transportation, the breaking structure 52 can be broken without any problem.

Further, since the amount of protrusion of the second end portion 512 of the gripping piece 51 from the fracture structure 52 is reduced, the handle 4 is erroneously rotated, and the engaging projection 53 is the second end. Even when it comes into contact with the portion 512, the force applied to the fracture structure 52 can be reduced. Therefore, when the handle 4 is erroneously rotated, the rotation of the handle 4 can be stopped while making the breaking structure 52 difficult to break.

When the amount of protrusion of the second end portion 512 of the grip piece 51 from the fracture structure 52 is rotated by 45 ° counterclockwise when the handle 4 is viewed from the base end side, the engaging protrusion 53 Since the length is set so that the second end portion 512 and the second end portion 512 come into contact with each other, the outer communication hole 21 and the inner communication hole 31 do not communicate with each other until the breaking structure 52 is broken, and the liquid storage container It is possible to prevent the content liquid of C from leaking out.

Since the first end surface 521 of the fracture structure 52 is not located at the boundary surface where the first split type M1 and the second split type M2 abut during resin molding of the main body MB, the cock 100 is mass-produced. Then, even when the vicinity of the boundary surface between the first divided type M1 and the second divided type M2 is scraped and deteriorated, the shape of the groove 523 on the first end surface 521 changes as described above. Can be suppressed. Therefore, even if the resin molding is repeated, the thickness of the thin-walled portion 524 on the first end surface 521 can be kept small.

Since the entire fracture structure 52 is formed only by the first split type M1, the ridge portion M1a forming the groove 523 of the fracture structure 52 is scraped or chipped even when the resin molding is repeated. It can be minimized.
Therefore, it is possible to prevent the portion of the groove 523 of the fracture structure 52 other than the portion opened in the second end surface 522 from being filled with burrs or the like.

Further, since the first end surface 521 is on the same side as the first end portion 511 of the gripping piece 51 with respect to the parting line P formed in the axial direction of the outer cylinder 2, the first end surface 521 is described. The 1-end portion 511 is pulled up outward in the radial direction of the outer cylinder 2, and the first end surface 521, which is kept thin, is likely to cause a crack that triggers a break. Therefore, even if the resin molding is repeated, the breaking structure 52 can be easily broken.

Since the main body MB includes the single type region S and the split type region M, the gripping piece 51 having a complicated shape and the breaking structure do not affect the portion where liquidtightness is required. The 52 can be easily released from the mold.

Similarly, since the portion of the inner cylinder 3 on the base end side including the ring-shaped protrusion 32, the handle 4, and the engaging protrusion 53 are included in the split mold region M, these can be easily removed from the mold. Can be released from the mold.

Further, the length of the engaging protrusion 53 with respect to the axial direction is the distance from the front end side surface of the outer cylinder 2 of the handle 4 to the top surface of the second single type S2. Since it is set to be equal to, the length of the outer cylinder 2 of the engaging protrusion 53 in the axial direction can be extended to the maximum while maintaining the ease of mold release. As a result, the engaging protrusion 53 can be firmly brought into contact with the second end portion 512 of the gripping piece 51.

Since the engaging projection 53 is formed on the inner peripheral side of the handle 4, when the handle 4 is erroneously rotated, the engaging projection 53 generates an excessive torque in the fracture structure 52. This can be suppressed and the fracture structure 52 can be prevented from being fractured or deformed.

Since a columnar support 54 for connecting the gripping piece 51 and the outer cylinder 2 is further provided, for example, the handle 4 is mistakenly rotated during transportation, and the engaging protrusion 53 is formed. When the second end portion 512 of the gripping piece 51 comes into contact with the face plate portion on the outer cylinder 2 side, the support column 54 supports the gripping piece 51, and the fracture structure 52 is broken or deformed. You can prevent it from happening.

Further, since the unopened proof mechanism 5 has a structure related to the unopened proof function integrated on the proximal end side, it inhibits the structure related to the lock function formed on the distal end side, which will be described in detail below. Never. Therefore, a plurality of functions can be reasonably realized in the cock 100.

Here, a modified example of the unopened proof mechanism 5 will be described.

For example, the shape of the gripping piece 51 is not limited to the plate-like shape described above, but may be a columnar shape, or may be a shape such that a columnar portion and a plate-shaped portion are combined. ..

Further, the size of the grip piece 51 is such that when the grip piece 51 is viewed from the axial direction, the end of the grip piece 51 on the first end portion 511 side is from the side surface of the outer cylinder body 2. It is not limited to the one located on the outer side as much as the diameter of the body 2, and may be on the outer side or the inner side.

Further, the gripping piece 51 is not limited to the one extending in the tangential direction of the outer cylinder 2, and may extend in the circumferential direction of the outer cylinder 2.

The shape of the support column 54 that connects the gripping piece 51 and the outer cylinder 2 is not limited to a columnar shape, but may be a prismatic shape, a deformed columnar shape, or the like.

The shape of the groove 523 of the fracture structure 52 is not limited to a V-shape, but may be a U-shape, a semicircular shape, or the like.

Depending on the shape of the groove 523, the shape of the inner side wall 525 and the outer wall 526 can also be freely designed.

Furthermore, the thin portion 524 of the fracture structure 52 does not necessarily have to be continuously formed from the first end surface 521 to the second end surface 522, and has a shape such that a part thereof is missing. You may.

The number of molds used to form the split mold region M is not limited to two, and may be three, four, or more.

The entire groove 523 of the fracture structure 52 does not have to be formed only by the first division type M1. For example, the first end surface 521 of the fracture structure 52 is a region formed by the first division type M1. The second end surface 522 may be located in the region formed by the second split type M2.

The gripping piece 51 and the breaking structure 52 are not limited to those formed integrally with the outer cylinder body 2, and may be formed integrally with the mounting portion 1.

The handle 4 is not limited to one that is rotated counterclockwise when viewed from the base end side to open the cock 100, and is rotated clockwise when viewed from the base end side. The cock 100 may be opened.

The engaging protrusion 53 is not limited to the one formed at a position where a predetermined gap is formed between the engaging protrusion 53 and the inner side wall 525, but is formed at a position where it contacts only the outer peripheral side portion of the inner side wall 525. You can do it.

The engaging protrusion 53 is not limited to the one that comes into contact with the gripping piece 51 when the handle 4 is rotated counterclockwise by 45 ° when viewed from the base end side. For example, when the rotation angle of the handle 4 for switching from the closed state to the open state is 180 °, the handle 4 is rotated counterclockwise by about 90 ° when viewed from the base end side. The grip piece 51 may be brought into contact with the grip piece 51 before being moved.

Further, the rotation angle of the handle 4 for switching from the closed state to the open state is 180 °, but the rotation angle is not limited to this, and may be 180 ° or more or 180 ° or less.

Next, the structure on the tip end side of the cock 100 according to the present embodiment will be described in detail.

As shown in FIGS. 1 to 3, the cock 100 is provided between the outer cylinder 2 and the inner cylinder 3, and even after the unopened certification mechanism 5 is broken, the operation unit It further has an engaging structure 6 for fixing the OP so that it does not rotate in the circumferential direction.

As shown in FIGS. 2 and 3, the engaging structure 6 has a lid 7 that detachably closes the tip of the inner cylinder 3 and the opening on the tip side of the outer cylinder 2 in the closed state. It is a structure that prevents the inner cylinder 3 from rotating in the circumferential direction with respect to the outer cylinder 2 by engaging with the internal structure of the above.

The engaging structure 6 has a shaft of the inner cylinder 3 from a fixing protrusion 61 protruding from the top surface of the lid 7 and a tip of the inner cylinder 3 on the side where the inner communication hole 31 is formed. It is provided with a semi-cylindrical movable protrusion 62 protruding in the direction. A fixed engaging surface 611 is formed on the side surface of the fixed protrusion 61, and a movable engaging surface 621 is formed on the side surface of the movable protrusion 62.

The inner cylinder 3 can freely rotate in the circumferential direction when the lid 7 does not cover the inner cylinder 3, but when the lid 7 covers the inner cylinder 3, the inner cylinder 3 starts from the closed state. Even if the handle 4 is rotated by a predetermined angle or more, the movable engaging surface 621 is hooked on the fixed engaging surface 611 and cannot be rotated any more, so that the inner communication hole 31 and the outer side can be rotated. It is possible to prevent the communication holes 21 from communicating with each other.

More specifically, the lid 7 does not substantially rotate with respect to the outer cylinder 2 in the circumferential direction by the hinge 8 provided at the tip of the outer cylinder 2. It is connected. Therefore, when the lid is covered by the lid 7 and the movable engaging surface 621 and the fixed engaging surface 611 are engaged with each other, the inner cylinder 3 is also provided by the lid 7 in the circumferential direction. It will be fixed so that it cannot rotate.

The fact that the lid 7 and the inner cylinder 3 do not substantially rotate with respect to the circumferential direction means that, in the present embodiment, for example, the hinge 8 has rigidity in the circumferential direction. It can be said that the rigidity is set sufficiently larger than the rigidity of the lid 7 in the movable rotation direction.

Hereinafter, the details of the movable engaging surface 621 and the fixed engaging surface 611 will be further described.

As shown in FIGS. 2 and 3, the movable engaging surface 621 is formed on a movable protrusion 62 which is a portion of at least a part of the tip of the inner cylinder 3 protruding outward from the outer cylinder 2. It is done. The movable protrusion 62 is formed in a substantially semicircular shape, and the movable engaging surface 621 is formed as two end faces in the circumferential direction thereof.

The movable engaging surface 621 extends along the axial direction, and at least a part thereof is inserted into the outer cylinder body 2 by a predetermined distance from the tip end side of the outer cylinder body 2. .. In other words, the tip of the movable protrusion 62 formed at the tip of the inner cylinder 3 projects outward from the tip of the outer cylinder 2. On the other hand, at the tip of the inner cylinder 3 opposite to the inner communication hole 31, a portion that does not contact the inner peripheral surface of the outer cylinder 2 is formed at a predetermined distance, and the end surface thereof is the outer cylinder. It is designed to be placed in a deep position inside the body 2.

On the other hand, as shown in FIGS. 2 and 3, the fixed engaging surface 611 is the circumference of the fixed protrusion 61 protruding in the axial direction from the inner surface on the top surface side of the lid 7. It is formed as two end faces in the direction. In the present embodiment, the fixed protrusion 61 is formed so that the central angle is approximately 30 ° when the end surface is viewed. The size of the fixing protrusion 61 may be appropriately set so as not to be broken or greatly deformed, for example, according to the magnitude of the torque received by the fixing protrusion 61.

The fixed protrusion 61 is about the same as the peripheral wall of the lid 7 so that at least a part of the fixed engaging surface 611 engages the movable engaging surface 621 inside the outer cylinder 2. It is designed to protrude to the height. That is, the tip portion of the fixing protrusion 61 is inserted into the outer cylinder 2 when the lid is closed.

As shown in FIG. 3, the movable protrusion 62 and the fixed protrusion 61 interfere with each other in the open state so that the lid 7 cannot cover the lid. In other words, as shown in FIG. 2, the inner communication hole 31 of the inner cylinder 3 is directed upward by the handle 4, and the movable protrusion 62 is the hinge in the closed state in which the inner communication hole 31 is not communicating with the outer communication hole 21. The 8 side is arranged as an apex, and the fixing protrusion 61 is provided so as to be arranged on the side opposite to the hinge 8 in the closed state. With this configuration, the lid of the inner cylinder 3 can be formed by the lid 7 only in the closed state, and the movable engaging surface 621 and the fixed engaging surface 611 are arranged to face each other and engaged with each other. be able to. Therefore, only when the inner cylinder 3 is in the closed position by the handle 4, the lid 7 can be locked so that the inner cylinder 3 does not rotate in the circumferential direction. it can.

More specifically, when the handle 4 is closed in the horizontal direction as shown in FIG. 2, a gap is formed between the movable engaging surface 621 and the fixed engaging surface 611. In this way, the lid 7 is easily put on the tip of the inner cylinder 3. When the handle 4 is turned counterclockwise when viewed from the base end side from this state, the movable engaging surface 621 engages with the fixed engaging surface 611 facing upward in the lid 7, and the movable engaging surface 621 is engaged. The rotation of the inner cylinder 3 is prevented. Further, in the closed state, if the handle 4 is to be turned clockwise when viewed from the base end side, the handle 4 interferes with the upper surface of the mounting portion 1 and cannot be turned, so that the handle 4 is not opened. .. If the handle 4 and the mounting portion 1 are created so as not to interfere with each other and the handle 4 is turned clockwise, the inner cylinder 3 can rotate up to 90 °, but this time. Is prevented from further rotation of the inner cylinder 3 by engaging the other of the movable engaging surfaces 621 with the other fixed engaging surface 611 facing in the horizontal direction in the lid 7. To. That is, no matter which direction the inner cylinder 3 rotates, it cannot be rotated until the inner communication hole 31 and the outer communication hole 21 communicate with each other, and the closed state remains.

As described above, according to the engaging structure 6 of the cock 100 of the present embodiment, the engaging structure 6 and the lid 7 fixed by the hinge 8 so as not to rotate in the circumferential direction. By covering the tip of the inner cylinder 3 with the lid 7, the movable protrusion 62 is engaged with the fixed engaging protrusion 53, and the inner cylinder 3 is circular. It can be fixed so as not to rotate in the circumferential direction.

Further, at least a part of the movable engaging surface 621 is located inside the outer cylinder 2 with respect to the tip on the tip side of the outer cylinder 2, and the fixed engaging surface 611. The fixing projection 61 projects to the same height as the peripheral wall of the lid 7 so that at least a part thereof engages with the movable engaging surface 621 inside the outer cylinder 2. Therefore, the movable engaging surface 621 in contact with the fixed engaging surface 611 is set to a sufficient height so that the movable engaging surface 621 does not get over the fixed engaging surface 611 and the handle 4 does not rotate. be able to.

Further, in this embodiment, as shown in FIG. 2 and the like, the outer peripheral surface of the portion of the tip portion of the inner cylinder 3 that protrudes outward from the outer cylinder 2 in a state of being covered by the lid 7. However, the thickness of the lid 7 is partially increased so as to come into contact with the inner surface of the lid 7. With this configuration, even if the inner cylinder 3 is turned more strongly while the inner cylinder 3 is in contact with the fixing protrusion 6, the tip protruding portion of the inner cylinder 3 is in contact with the lid 7. Because it is, it cannot escape to the outer peripheral side. Therefore, even if the inner cylinder 3 tries to rotate strongly, it cannot get over the fixing protrusion 6 while it is locked.

Therefore, it is possible to prevent the inner cylinder 3 from unintentionally rotating due to a force applied to the handle 4 for some reason as in the conventional case, without preparing a separate stopper or the like. Therefore, although the cock 100 has a function of preventing the inner cylinder 3 from rotating even in the closed state, it may be composed of only two resin molded parts of the main body MB and the operation OP. It is possible to reduce the number of parts and assembly man-hours, and the manufacturing cost can be reduced.

Next, other embodiments of the engaging structure 6 will be described.

For example, the fixing protrusion 61 and the movable protrusion 62 are not limited to those provided on the lid body 7 and the inner cylinder body 3 respectively, and a plurality of each may be provided. As long as the length of the fixing protrusion 61 is such that it enters the inside of the outer cylinder 2, the same effect as described above can be obtained. In addition to this, for example, those having various shapes as described in Japanese Patent Application Laid-Open No. 2016-0237992 can be adopted.

The cock 100 of the present invention is not limited to the examples of use shown in the above embodiment, and may be used for various purposes. In addition, various modifications and combinations of embodiments may be made as long as it does not contradict the gist of the present invention.

C ... Liquid storage container 100 ... Cock MB ... Main body 1 ... Mounting part 2 ... Outer cylinder 21 ... Outer communication hole OP ... Operation unit 3 ... Inner cylinder Body 4 ... Handle 31 ... Inner communication hole 5 ... Unopened certification mechanism 51 ... Gripping piece 511 ... First end 512 ... Second end 52 ... Break structure 521 ... 1st end surface 522 ... 2nd end surface 523 ... Groove 524 ... Thin wall portion 525 ... Inner side wall 526 ... Outer wall 53 ... Engagement protrusion 54 ... Support S, S'... Single type region M, M'... Divided type region M1a ... Ridge part P ... Parting line P'... Outer cylinder along the axial direction of the outer cylinder Parting line 6 ... engaging structure 61 ... fixed protrusion 611 ... fixed engaging surface 62 ... movable protrusion 621 ... movable engaging surface 7 ... lid 8 ... Hinge

Claims (8)

A cock that is attached to a liquid storage container and draws out the contents of the liquid storage container to the outside.
A main body having an outer cylinder with both ends open, a mounting portion connected to the outer cylinder and attached to the liquid storage container, and a main body.
An outer communication hole formed through the side surface of the outer cylinder and communicating with the inside of the liquid storage container, and an outer communication hole.
An inner cylinder that has an opening on the tip side and is rotatably fitted inside the outer cylinder in the circumferential direction.
An inner communication hole formed by penetrating the side surface of the inner cylinder,
It is provided on the base end side of the inner cylinder, and is rotated in the circumferential direction together with the inner cylinder to communicate the outer communication hole and the inner communication hole, or the outer communication hole. And a handle configured to be switchable to either the closed state in which the inner communication hole is not communicated with the inner communication hole.
A cock that draws out the content liquid from the tip side to the outside.
Further provided with an unopened proof mechanism configured to allow the handle to rotate from the closed state to the open state only when a part thereof is broken.
The unopened proof mechanism is formed between the base end side of the outer cylinder of the main body and the handle.
The unopened certification mechanism
A gripping piece that is provided at a predetermined distance from the outer cylinder and whose first end extends in the circumferential direction or the tangential direction of the outer cylinder.
A fracture structure in which the outer cylinder and the gripping piece are connected and the strength is lower than that of the outer cylinder and the gripping piece.
It is provided with an engaging protrusion formed on the handle and in contact with the gripping piece.
The fracture structure
The first end face and the second end face facing each other,
A groove formed along the circumferential direction or the tangential direction of the outer cylinder so as to open to the first end face and the second end face.
A cock comprising a thin portion formed on the bottom side of the groove. The outer cylinder, the gripping piece, and the fractured structure are integrally resin-molded so that the parting line is formed at least on the surface of the outer cylinder along the axial direction thereof.
The first end face of the fractured structure is an end face located on the side of the gripping piece close to the first end.
When the parting line is viewed from a direction perpendicular to the parting line, the first end portion of the gripping piece and the first end surface of the fractured structure are the same with respect to the parting line. The cock according to claim 1, wherein the cock is configured to be on the side. A single mold region that is resin-molded so that a parting line along the axial direction of the outer cylinder is not formed on the surface of the outer cylinder, and
It is provided with a split mold region that is resin-molded so that a parting line along the axial direction of the outer cylinder is formed on the surface of the outer cylinder.
The cock according to claim 2, wherein the gripping piece and the fractured structure are included in the split type region. The handle is formed so as to extend outward in the radial direction of the outer cylinder.
The fracture structure
The inner side wall, which is the wall on the outer cylinder side of the groove,
It is provided with an outer wall which is a wall on one side of the grip of the groove.
Even if the breaking structure is broken and the handle is rotated , the engaging protrusion contacts only the position where a predetermined gap is formed with the inner side wall or the outer peripheral side portion of the inner side wall. The cock according to claim 2 or 3, wherein the cock is formed at a position where the cock is formed. It is configured to be in the open state by rotating the handle 180 degrees from the closed state.
The cock according to claim 2 to 4, wherein the gripping piece and the engaging protrusion come into contact with each other within a range in which the rotation angle of the handle is 0 degrees or more and 90 degrees or less. The engaging protrusion is configured to come into contact with the second end portion of the gripping piece, which is provided separately from the first end portion, from the outer cylinder side.
The cock according to claim 2 to 5, wherein the fractured structure further includes a support column formed between the gripping piece and the outer cylinder. A lid that is fixed to the outer cylinder so as not to rotate substantially in the circumferential direction, and is configured to detachably close the opening on the tip side of the outer cylinder. 1. A claim 1 is further provided with an engaging structure including a movable engaging surface formed at the tip end portion of the inner cylinder body and a fixed engaging surface provided inside the lid body. The cock according to 6. At least a part of the movable engaging surface is located inside the outer cylinder body with respect to the tip end side of the outer cylinder body.
When the lid is closed by the lid , at least a part of the fixing protrusions that protrude from the inside of the lid and have the fixed engaging surface are configured to be located inside the outer cylinder. 7. The cock according to claim 7.