JP2006226379A - Woods valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To bring out the performance of a Woods valve using a seal rubber to the maximum extent by allowing tightly fastening an attaching screw and by inhibiting pressure from concentrating on the seal rubber even when the attaching screw is tightly fastened, and to eliminate loosening and fear of tampering by tightly fastening the attaching screw with tools. <P>SOLUTION: The Woods valve has a construction in which a filling valve with the seal rubber is inserted into a valve tube portion attached to a tube and the filling valve is secured by the attaching screw threadably engaged with a screw on the periphery of a valve tube mouth. In the Woods valve, an engagement means for engaging with the valve tube portion 12 to control an insertion amount of the filling valve 15 is provided between the valve tube mouth 14 and the filling valve 15 and a screwing limit of the attaching screw 25 is defined by the engagement means so that the valve tube mouth 14 and the attaching screw can be tightly fastened without excessively pressing the seal rubber 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an English valve having a configuration in which an injection valve with a seal rubber is inserted into a valve tube portion attached to a tube, and the injection valve is fixed by a mounting screw that is screwed with a screw around a valve tube port portion. .

  The English valve has a structure that closes the valve port by rubber parts called insect rubber attached to the injection valve, but if the mounting screw that fixes the injection valve to the valve cylinder part is tightened strongly, the injection valve and the valve cylinder There was a problem that the pressure was concentrated on the part of the insect rubber sandwiched between the parts, and the insect rubber was broken to cause air leakage. In other words, the English valve maintains the airtightness between the injection valve and the valve tube part by means of insect rubber, so do not use tools to tighten the screws strongly and obtain an appropriate airtightness. It is necessary to keep the tightening torque within the allowable range. It is no exaggeration to say that because of this gap, even if you intend to tighten the mounting screw strongly, it has a fateful weakness that it is easy to loosen due to the elasticity of insect rubber or to be easily tampered with. However, the structure is simple, and even if there is a failure, it is almost always necessary to replace the rubber gum, so it has been used for many years in applications that do not require high pressure. The invention and device related to the English valve have the following two points, but they do not improve the above weak points.

JP 2002-137612 A Registered utility model No. 3044387

  The present invention has been made paying attention to the above points, and the problem is that the mounting screw can be strongly tightened, and even if the mounting screw is strongly tightened, the pressure is not concentrated on the insect rubber, It is to be able to draw out the performance of the English valve using insect rubber to the maximum extent. Another object of the present invention is to provide an English valve that does not loosen and is not likely to be tampered with by making it possible to strongly tighten a mounting screw using tools.

  In order to solve the above-mentioned problems, the present invention has a configuration in which an injection valve with insect rubber is inserted into a valve barrel portion attached to a tube, and the injection valve is fixed by an attachment screw that is screwed with a screw around the valve barrel opening portion. In the English type valve having the above, an engaging means for engaging the valve cylinder portion and managing the insertion amount of the injection valve is provided between the valve cylinder mouth portion and the injection valve, and the screwing limit of the mounting screw is set by the engagement means. A measure is taken to allow tightening of the valve barrel opening portion and the mounting screw without excessively pressing the seal rubber.

  The British valve closes the small hole opened in the injection valve by fitting a pipe-shaped rubber called insect rubber, and when the air is injected, the insect rubber is pushed open by the pressure of compressed air, and the pressure decreases. In this case, the structure shown in FIG. 1A is typical, in which the rubber gum contracts immediately to prevent leakage. However, since rubber bugs are also involved in the sealing performance between the valve cylinder and the injection valve, there is a possibility of breaking when the rubber band is tightened strongly. In order to solve this weak point, As long as the necessary pressure is obtained between the cylinder and the injection valve, the excessive pressure is not exerted on the rubber band between the valve mouth and the injection valve. An engaging means is provided to manage the amount of insertion of the injection valve into the valve barrel. There is also a structure shown in FIG. 1B in which a valve rubber as an injection valve is provided at the tip and is divided into a seal rubber that keeps airtight with the valve cylinder, and in this case, the seal rubber is an object in the present invention.

  The engaging means is engaged between the valve opening and the injection valve so that the injection valve cannot be inserted further into the valve cylinder, and the injection valve protrudes without being inserted into the valve cylinder. It is also managing the amount (L) which exists (refer FIG. 2 thru | or 4). Such an engagement means does not impair the ease of use of the conventional English valve, and there is a high possibility that the English valve will not be fundamentally changed. The amount of the injection valve inserted into the valve barrel can be determined empirically or experimentally. Also, the difference between the inner diameter of the valve barrel and the outer diameter of the injection valve, and the thickness of the rubber rubber sandwiched between them. It can also be determined by considering the taste.

  The engaging means can be constituted by a concave portion formed in the valve tube mouth portion and a convex portion formed on the outer surface of the injection valve so as to be engageable therewith. The concave part formed in the valve tube mouth part and the convex part formed on the outer surface of the injection valve are structures also found in conventional English valves, but the conventional concave-convex fitting structure has the convex part tip in contact with the bottom of the concave part. Tightening to the point damages the seal rubber and causes breakage. Therefore, it may be considered as a rotation stopper that prevents the injection valve from rotating when the mounting screw is screwed, rather than the engagement means in the present invention.

  As an aspect of the concave portion and the convex portion, the concave portion bottom and the convex portion are defined in an aspect (the one shown in FIGS. 1A and 2) that regulates the insertion amount of the injection valve by contacting the tip of the convex portion to the concave bottom, and the screwing limit of the mounting screw. There may be a mode (a thing of Drawing 1B and Drawing 3) which creates a crevice between part tips. In the former, the convex portion defines the screwing limit, and in the latter, the mounting screw defines the screwing limit. Further, the engagement means has a circumferential protrusion that is pressed against the valve barrel port portion by contacting the mounting screw and is fixed to the end surface of the valve barrel port portion to manage the insertion amount of the injection valve. May be taken (the ones in FIGS. 1C and 4). In any case, it goes without saying that an appropriate pressure is exerted on the seal rubber at the limit of the mounting screw.

  Since the present invention is configured and operates as described above, the mounting screw can be strongly tightened against the valve cylinder, and even if the mounting screw is strongly tightened, the pressure can be concentrated on the insect rubber. Since the seal rubber is not damaged, the sealing effect of the English valve is 100%. Further, since the mounting screw can be tightened by using a tool, it is not tampered with during parking or loosened during use.

  The present invention will be described in detail below with reference to the embodiments shown in the drawings. In each figure, 11 is a tube, 12 is a valve cylinder attached to the tube, and a threaded portion 13 is formed on the outer peripheral surface. . The end portion of the valve tube portion 12 is a valve tube port portion 14 that forms a port into which the injection valve 15 is inserted.

  The injection valve 15 is a hollow member whose lower part is closed and whose upper part is open. The injection valve 15 is close to the lower part, has a small hole 16, and has a protrusion 17 like a ledge of a abacus ball at an intermediate position. The seal rubber 18 shown as rubber covers the lower half of the injection valve 15 up to the point where the protrusion 17 is wrapped. In order to obtain an airtight sealing effect by the seal rubber 18, the thickness of the seal rubber 18 needs to be slightly larger than the difference between the outer diameter of the protrusion 17 and the inner diameter of the valve cylinder portion 12.

  Four examples are shown in the drawing as the engaging means that engages with the valve barrel port 14 and regulates the insertion amount of the injection valve 15. Example 1 in FIG. 1A is an engagement means including a concave portion 21 in the cylinder axis direction formed in the valve barrel opening 14 and a convex portion 22 formed on the outer surface of the injection valve. Although the concave portion 21 and the convex portion 22 of Example 1 seem to be similar to the conventional one, the convex portion 22 is formed long so that the tip 23 thereof is in contact with the concave bottom 24, thereby sealing rubber. Since the excessive compression of 18 is prevented, it is a fundamentally different structure (refer FIG. 2).

  The injection valve 15 is attached to the valve opening 14 with a mounting screw 25. Therefore, the injection valve 15 has a female thread portion 26 that can be screwed with the male screw portion 13 on the inner periphery, and a bag-shaped mouth portion 28 that can be engaged with the engagement portion 27 of the injection valve 15 at the upper end portion. ing. The attachment screw 25 shown in Example 1 has a knurled portion as a non-slip 29 for screwing.

  Therefore, the injection valve 15 is inserted into the valve barrel port portion 14 from the lower half portion covered with the seal rubber 18, the concave portion 21 and the convex portion 22 are engaged, and the peripheral portion of the valve barrel port portion is surrounded by the female screw portion 26 of the mounting screw 25. By screwing with the male thread portion 13 of the surface, the injection valve 15 can be fixed by strongly tightening the convex portion tip 23 in contact with the concave portion bottom 24. At this time, a gap 19 is formed above the valve barrel opening portion 14, and the amount L protruding from the valve barrel opening portion 14 is checked to determine how to attach the injection valve 15 and the mounting screw 25 to the valve barrel portion 12. Can be determined.

Example 2 shown in FIG. 1B is an engaging means including a concave portion 31 and a convex portion 32 that create a gap 35 between the concave bottom 34 and the convex tip 33 at the limit of screwing of the mounting screw 25 ′. In this example 2, the recessed portion 31 is formed deeply, and the screwing of the female screw portion 26 of the mounting screw 25 ′ and the male screw portion 13 of the valve barrel portion 12 is limited while the convex tip 33 does not contact the concave bottom 34. (See FIG. 3). The injection valve 15 'in Example 2 has a structure divided into the valve rubber 18a and the seal rubber 18' as described above, and the valve rubber 18a moves during the injection. The limit means a state where the screw cannot be screwed. Hereinafter, the reference numerals in FIG. 1A are used for common configurations. Therefore, when the injection valve 15 ′ is inserted into the valve cylinder portion 12 in the same manner as described above, the concave portion 31 and the convex portion 32 are engaged, and the mounting screw 25 ′ is similarly screwed to the valve barrel portion 13, the concave bottom With the gap 34 between the projection 34 and the projection tip 33, the engagement portion 27 and the bag-like mouth portion 28 are engaged, and the injection valve 15 'can be fixed. The amount L protruding from the valve tube port 14 is the same as in the first example, and the pressure applied to the seal rubber 18 'is also appropriate as in the first example. The example mounting screw 25 'has two parallel spanner hooking surfaces as a slip stopper 29' at the time of screwing.

In Example 3 of FIG. 1C, a flange portion 41 is provided on the outer surface of the injection valve 15 ″ so as to come into contact with the mounting screw 25 ″ at the screwing limit of the mounting screw 25 ″, and injection is performed by contacting the end surface of the valve tube mouth portion 14. It has a protrusion of an engaging means provided with a circumferential spacer 42 so as to regulate the insertion amount of the valve 15 ″. The collar portion 41 of Example 3 is an existing one, and the spacer portion 42 uses a washer. The anti-slip 29 ″ of Example 3 is formed in a hexagonal nut shape. Therefore, when the injection valve 15 ″ is inserted into the valve cylinder portion 12 in the same manner as in the above two examples and the mounting screw 25 ″ is screwed from the outside. The collar portion 42 is tightened in a state where the circumferential spacer portion 42 is in contact with the end face of the valve barrel opening portion 14, and the collar portion 41 pressed by the inner surface of the bag-like mouth portion 28 of the mounting screw 25 ″, and the valve barrel opening Since the necessary gap 45 is maintained between the spacer portion 42 and the spacer portion 42 in contact with the portion 14, the amount L protruding from the valve tube port portion 14 is also managed constant. In Example 4 of FIG. 5, a protrusion 46 is provided in which the collar portion 41 and the spacer portion 42 are integrated.
That is, Example 4 is a modified example having the same purpose as Example 3, and is provided with a protrusion 46 at a position where the protrusion amount L is obtained. In Examples 3 and 4, the recess 31 is not used.

  In the present invention, as is clear from the description of Examples 1, 2, and 3 above, even if the mounting screws 25 are screwed into the valve cylinder portion 12 and tightened, gaps 19, 35, and 45 are generated therebetween. Further, the insect rubber 18 can be prevented from being damaged without applying an excessive external force. Then, by tightening the mounting screws 25 to a necessary screwing limit using a tool, a strong tightening state that cannot be loosened with a fingertip can be obtained.

The example of embodiment of the English type valve which concerns on this invention is shown, A is an exploded perspective view of Example 1, B is Example 2, and C is Example 3. FIG. 1 relates to Example 1 according to the present invention, in which A is a front view and B is a longitudinal sectional view. Regarding Example 2 according to the present invention, A is a front view and B is a longitudinal sectional view. Regarding Example 3 according to the present invention, A is a front view and B is a longitudinal sectional view. Regarding Example 4 according to the present invention, A is a front view and B is a longitudinal sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Tube 12 Valve cylinder part 13 Male thread part 14 Valve cylinder port part 15, 15 ', 15 "Injection valve 18, 18' Seal rubber 19, 35, 45 Crevice 21, 31 Concave part 22, 32 Convex part 23, 33 Tip of convex part 24, 34 Recess bottom 25, 25 ', 25 "Mounting screw 26 Female thread 29, 29', 29" Non-slip 41 Brim 42 Spacer 46 Projection

Claims (4)

In an English valve having a configuration in which an injection valve with a seal rubber is inserted into a valve cylinder part attached to a tube, and the injection valve is fixed by a mounting screw that is screwed with a screw around the valve mouth part,
Engagement means that engages with the valve cylinder and manages the amount of insertion of the injection valve is provided between the valve cylinder mouth part and the injection valve, the engagement means defines the screwing limit of the mounting screw, and excessive sealing rubber is used. An English valve characterized in that it is possible to tighten the valve barrel opening and the mounting screw without pressure. The engaging means is composed of a concave portion formed in the valve barrel opening portion and a convex portion formed on the outer surface of the injection valve so as to be able to engage with the concave portion, and the insertion amount of the injection valve is defined by contacting the tip of the convex portion with the bottom of the concave portion. Item 1. The English valve according to item 1. The engaging means is composed of a concave portion formed in the valve tube mouth portion and a convex portion formed on the outer surface of the injection valve so as to be engageable therewith, and at the screwing limit of the mounting screw, a gap is formed between the concave portion bottom and the convex portion tip. The English valve of claim 1 which results. The engaging means has a circumferential protrusion that is pressed against the valve barrel opening by contacting the mounting screw and that is fixed to the end face of the valve barrel opening to manage the insertion amount of the injection valve. Item 1. The English valve according to item 1.

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