JP4113358B2 - Injection valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection valve, and more particularly, to a fluid injection valve such as an air valve for an air cushion or a lifeboat or a water injection valve for a water futon or a water bag.
[0002]
[Prior art]
A conventional injection valve will be described by taking an air valve for an air cushion shown in FIG. 6 as an example.
The injection valve 8 includes a valve seat 81 attached to an injection target 9 such as an air cushion, and a lid 82 attached to an opening 811 of the valve seat 81.
In the injection valve 8, an injection tube (not shown) is inserted into the opening 811 of the valve seat 81, and fluid such as air is injected into the injection target 9 such as an air cushion, and then the lid is taken out at the moment the injection tube is taken out. 82 must close the opening 811 of the valve seat 81.
[0003]
Otherwise, there is a drawback that the injected air and other fluids may be ejected as much as necessary due to the internal pressure of the injection target 9.
In order to eliminate the disadvantages of the injection valve 8, conventionally, a one-way valve is provided in the injection valve, and when the injection tube is taken out, one that can close the injection valve with the one-way valve is often used. ing.
[0004]
[Problems to be solved by the invention]
However, when using a one-way valve as an infusion valve, the cost issue is that when the one-way valve is trying to release air or other fluids in the infused body such as an air cushion for transportation or storage, In order to obstruct the discharge operation, for example, insert a pin or other tool from the opening of the injection valve and hold the one-way valve open for a long time while pressing the injection target to release the internal fluid. There is also a drawback that it takes a lot of time and effort.
[0005]
In view of the above, an object of the present invention is to provide an injection valve that can prevent the discharge of fluid due to a backflow from an injection target when stopping the injection of the fluid without using a one-way valve. It is in.
In other words, the present invention provides an injection valve that can be closed by a lid without removing the injection tube, that is, without stopping the injection of fluid into the injection target body.
[0006]
The present invention also provides an injection valve that allows simple fluid discharge from the injection target and does not require the use of any tools.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured by a hollow body having both ends opened, a valve seat formed by extending a flange portion from the one end opening side in the hollow body into the hollow body, and one end opened. The valve seat has a hollow body closed at the other end, the end plate is located in the valve seat, and the open end is located outside the other end opening of the valve seat. A valve body provided in the valve seat so as to enter and exit along the central axis direction with respect to the other end opening, and a slot facing the flange portion of the valve seat is opened on the end plate. And a hollow body that opens at both ends, provided outside the other end opening of the valve seat so as to rotate about the central axis as a rotation axis , and linear movement of the valve body by the rotation movement. The end plate is brought into contact with the flange portion and the slot is As can be reciprocated the valve body before blocking the, characterized by comprising a knob means being engaged with the opening side of the valve body.
[0008]
According to the present invention, the fluid can be injected into the injection target body through the hollow portion and the slot of the valve body after the injection pipe is put into the valve body from the opening end of the valve body. Even in a state in which the valve body is not removed, the slot is closed by rotating the knob until the end plate of the valve body is brought into contact with the flange portion, thereby closing the slot and preventing the fluid from flowing into the injection target body. be able to. When the fluid is to be discharged from the injection target, the fluid is discharged from the slot and the hollow portion of the valve body only by reversing the knob and separating the end plate of the valve body from the flange portion and opening the slot. Can be released easily.
[0009]
The opening side of the valve body is cylindrical, and the hollow portion between the openings at both ends of the knob means is a columnar shape whose inner diameter is larger than the outer diameter of the opening side of the valve body, and the opening side of the valve body is A structure that forms a cam mechanism is formed on the outer peripheral surface of the valve body on the opening side and the inner peripheral surface of the knob means, respectively, when the knob means is rotatably inserted into the cylindrical hollow portion of the knob means. It is preferable to constitute an engagement with the means.
[0010]
In addition, the closed end plate side of the valve body is non-circular so that its outer contour does not protrude out of the outer contour on the opening side of the valve body when viewed from the direction of linear motion, and the valve seat is in the direction of linear motion It is preferable that the inner peripheral contour can be fitted on the outer peripheral contour on the end plate side of the valve body.
As a result, the valve body can only move linearly within the valve seat.
[0011]
The cam mechanism includes a spiral one-stage guide groove formed on the outer peripheral surface on the opening side of the valve body and a protrusion that protrudes from the inner peripheral surface of the knob means and is inserted into the guide groove. The distance between the first position where the slot is open and the second position where the slot is closed by the flange portion while the projection is moved along the guide groove by the rotational movement of the knob means. It is preferable that the length is set such that it can be reciprocated.
[0012]
Then, by rotating the knob, the valve body can be injected and discharged at the first position, or the valve body can be easily discharged at the second position. Can be prevented.
The valve body is formed with a plug body that projects from the end plate to close the opening in the flange portion of the valve seat, and the flange portion of the valve seat is in contact with the end plate and the plug body of the valve body. It is preferable that a seal ring is provided at the contact portion.
[0013]
As a result, the effect of closing the slot at the second position can be increased.
The knob means is preferably engaged with the other end opening side of the valve seat so that it can rotate.
According to this, the knob means can only perform a rotational movement along the rotation direction.
[0014]
Further, it is preferable that the protective cover is picked from the outer periphery on the other end side of the valve seat, and the means is extended outward so as to surround the extension line of the linear motion.
Thereby, the picking means can be protected from external force by the protective cover.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the injection valve according to the present invention will be described in detail.
In the following description, regardless of the size, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is performed only when necessary.
1 to 4 show a preferred embodiment of an injection valve according to the present invention.
As shown in the figure, this injection valve 1 mainly has a valve seat 3 which is a hollow body having openings 31 and 32 at both ends, and an edge 61 for coupling to the injection target body 2. A protective cover 6 that projects outward from the outer periphery on the one end 32 side, a valve body 5 that is a hollow body that has an opening 52 at one end and is closed by an end plate 51 at the other end, and a hollow annular body that has openings at both ends. It is comprised with the picking means 4 which is.
[0016]
More specifically, the valve seat 3 is formed at the flange portion 311 extending from the edge of the opening 31 at the other end of the both end openings 31 and 32 in the hollow body to the hollow body, and at the edge of the opening 32 at one end. And a flat surface portion 314 extending from the flange portion 311 in the valve seat 3 to the edge of the opening 32 at one end.
The valve body 5 is provided in the valve seat 3 such that the end plate 51 is fitted inside the valve seat 3 and the opening 52 is located outside the opening 32 of the valve seat 3. Further, the opening 52 of the valve body 5 has a cylindrical shape, and when viewed from the axial direction of the cylindrical shape, the outer periphery of the end plate 51 protrudes outside the cylindrical outer periphery of the opening 52 of the valve body 5. Any non-circular shape is acceptable. In this embodiment, most of the outline of the outer periphery is a circle formed by extending from the outer periphery of the opening 52 side. Since there is a flat surface portion 54 corresponding to the flat surface portion 314 of the valve seat 3, a circular shape with a notch (non-circular shape) is formed. Thereby, the valve body 5 is configured so as to be able to perform only a linear motion that enters and exits the opening 31 at the other end of the valve seat 3. A plurality of slots 511 facing the flange portion 311 of the valve seat 3 are opened in the end plate 51 of the valve body 5, and the flange plate 311 of the valve seat 3 is formed from substantially the center portion of the end plate 51. A plug body 512 for closing the opening is formed to protrude.
[0017]
The knob 4 has a columnar shape in which the inner diameter of the hollow portion between the openings at both ends is larger than the outer diameter of the cylindrical portion of the valve body 5, and the linear movement direction is out of the opening 32 of the valve seat 3. It is engaged with the engaging portion 321 of the opening 32 of the valve seat 3 so that only rotational movement along the rotation direction around the extension line of the valve seat 3 can be performed.
More specifically, the opening 52 of the valve body 5 is rotatably inserted into the cylindrical hollow portion of the knob means 4, and the outer peripheral surface of the cylindrical portion of the valve body 5 and the inside of the knob means 4 A mechanism (hereinafter referred to as a cam mechanism) that engages with each other to perform a cam motion is formed on each peripheral surface.
[0018]
The cam mechanism includes two spiral one-stage guide grooves 53 formed on the outer peripheral surface of the cylindrical portion of the valve body 5 and two guides protruding from the inner peripheral surface of the knob 4 and inserted into the guide grooves 53. The length of the guide groove 53 includes a pin-like protrusion 43 and the valve body 5 is linearly moved by the rotational movement of the knob 4, and the protrusion 43 is moved along the guide groove 53. 5 is set to a length capable of reciprocating between a first position where the slot 511 is open (see FIG. 3) and a second position where the slot 511 is closed by the flange portion 311 (see FIG. 4). Has been. Further, in order to increase the closing effect of the slot 511 in the second position, the flange portion 311 of the valve seat 3 is provided with a rubber seal ring 33 at a portion contacting the end plate 51 and the plug body 512 of the valve body 5. Is provided.
[0019]
As a result, as shown in FIGS. 3 and 4, after placing the valve body 5 in the first position (see FIG. 3), the injection tube 7 is inserted into the valve body 3 from the opening 52 of the valve body 5. The fluid can be injected into the injectable body 2 through the hollow portion of the valve body 5 and the slot 511, and even when the injection pipe 7 is not taken out, the knob 4 is rotated to rotate the valve body 5 By moving the valve body 5 forward until the end plate 51 contacts the flange portion 311, the slot 511 is closed as shown in FIG. 4, and the outflow of fluid in the injectable body 7 can be prevented. . When the fluid is to be discharged from the injected body 7, the slot plate 511 and the valve are opened only by separating the end plate 51 of the valve body 5 from the flange portion 311 while reversing the knob 4 and opening the slot 511. The fluid can be easily discharged from the hollow portion of the body 5. In other words, only by rotating the knob 4, the valve body 5 is placed in the first position (see FIG. 3) to inject and discharge fluid, or before stopping the injection. In addition, the simple operation of placing the valve body 5 at the second position (see FIG. 4) can completely prevent the fluid from being discharged from the injectable body 2.
[0020]
Further, the protective cover 6 is formed by projecting the knob means 4 so as to surround the extension line of the linear motion, so that the knob means 4 can be protected from external force. In order to protect the valve body 5, as shown in FIG. 5, instead of the valve body 5, a hollow cylindrical body 55 having a slightly smaller inner diameter is provided in the hollow portion of the valve body 5 at the site where the injection pipe is inserted. Also good.
[0021]
In the above-described embodiment, the case where the flat surface portion 314 is provided on the valve seat 3 and the flat surface portion 54 is provided on the valve body 5 in order to provide the valve body 5 so as to perform only linear motion has been described. For example, when the end plate side of the valve body is viewed from the direction of the linear motion, the outer contour of the valve body is a non-circular shape that does not protrude outside the outer contour of the valve body, and the valve seat is a straight line. When viewed from the direction of movement, the contour of the inner periphery may be fitted to the contour of the outer periphery on the end plate side of the valve body. Further, a concave groove along the axial direction may be formed on the inner peripheral surface of the valve seat 3, and a slide rail inserted into the concave groove may be formed on the outer peripheral surface of the valve body 5. As a result, the valve body can only move linearly within the valve seat.
[0022]
Further, as a means for reciprocating the valve body 5 of the knob means 4, the case where the knob means 4 is provided with the two protrusions 43 and the valve body 5 is provided with the guide groove 53 has been described, but the present invention is not limited thereto. For example, the guide means 4 may be provided with a guide groove, and the valve body 5 may be provided with two protrusions. Further, the opening end of the valve body is cylindrical, and the hollow portion between the openings at both ends of the knob means is a columnar shape whose inner diameter is larger than the outer diameter of the cylindrical portion of the valve body, and the opening of the valve body When the end is rotatably inserted into the cylindrical hollow portion of the knob means, a structure that constitutes a cam mechanism is formed on the outer peripheral surface of the cylindrical portion of the valve body and the inner peripheral surface of the knob means, respectively. You may comprise the engagement between a valve body and a knob means. Further, instead of the cam mechanism, a screw inching means may be provided in which a male screw is formed on the outer peripheral surface of the valve body and a female screw is formed on the inner peripheral surface of the knob means to be engaged with the male screw.
[0023]
The embodiments described above are merely intended to clarify the technical contents of the present invention, and the present invention is not limited to such specific examples and is not construed in a narrow sense. Various modifications can be made within the spirit and scope of the claims.
[0024]
【The invention's effect】
As described above, the injection valve according to the present invention can close the injection passage without taking out the injection tube, so that it is possible to stop the injection of the fluid without using the one-way valve. Release of fluid due to backflow from the body can be completely prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a preferred embodiment of an injection valve according to the present invention.
FIG. 2 is a perspective view when the embodiment shown in FIG. 1 is attached to an injection target body.
FIG. 3 is a cross-sectional view when the valve body in the embodiment shown in FIG. 1 is placed at a first position.
4 is a cross-sectional view when the valve body in the embodiment shown in FIG. 1 is placed in a second position. FIG.
FIG. 5 is a perspective view when another embodiment of the injection valve according to the present invention is attached to an injection target body.
FIG. 6 is a perspective view when a conventional injection valve is attached to an injection target.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Injection valve 3 Valve seats 31 and 32 Both-ends opening 311 of a valve seat Flange part 33 Seal ring 4 Knob means 43 Protrusion 5 Valve body 51 End plate 511 of a valve body Slot 512 Plug body 52 Opening 53 of a valve body Guide groove 6 Protective cover

Claims (6)

A valve body formed by a hollow body having both ends open, and a flange portion extending from the one end opening side of the hollow body into the hollow body;
One end is open and the other end is formed of a hollow body closed with an end plate, the end plate is located in the valve seat, and the open end is located outside the other end opening of the valve seat. A slot is provided in the valve seat so as to enter and exit along the central axis direction with respect to the other end opening of the valve seat, and a slot facing the flange portion of the valve seat is provided on the end plate. An open valve disc,
It is composed of a hollow body that is open at both ends, and is provided outside the other end opening of the valve seat so as to rotate about the central axis as a rotation axis. Picking means engaged with the opening side of the valve body so that the valve body can be reciprocated until the end plate is brought into contact with the flange portion to close the slot. An injection valve characterized by comprising: The opening side of the valve body is cylindrical, the hollow portion between the openings on both ends of the knob means is a cylindrical shape whose inner diameter is larger than the outer diameter of the opening side of the valve body, and the valve body A structure in which a cam mechanism is formed between the outer peripheral surface of the valve body and the inner peripheral surface of the knob means when the opening side is rotatably inserted into the cylindrical hollow portion of the knob means. The injection valve according to claim 1, wherein the injection valve is formed to form the engagement between the valve body and the knob. The closed end side of the valve body is a non-circular shape whose outer contour does not protrude outside the outer contour of the valve body when viewed from the direction of the linear motion, and the valve seat is The injection valve according to claim 2, wherein an outline of an inner periphery of the valve body can be fitted on an outer periphery of the end plate side as viewed from the direction of linear motion. The cam mechanism includes a spiral guide groove formed on the outer peripheral surface of the valve body on the opening side and a protrusion protruding from the inner peripheral surface of the knob means and inserted into the guide groove; and The length of the guide groove is determined by the first position where the slot is opened and the slot at the flange portion while the protrusion is moved along the guide groove by the rotational movement of the knob. The injection valve according to claim 2, wherein the injection valve is set to a length capable of reciprocating between the second position and the second position. A plug body for closing the opening in the flange portion of the valve seat is formed protruding from the end plate, and the flange portion of the valve seat is a portion that contacts the end plate of the valve body and the plug body The injection valve according to claim 1, further comprising a seal ring. The knob means is engaged with an opening edge of the other end of the valve seat so that the rotational movement is possible,
2. The injection valve according to claim 1, wherein a protective cover projects outward from the outer periphery on the other end side of the valve seat so as to surround the knob means around the extension line of the linear motion. .

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