JPH04124319U - valve for tube - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to provide a tube valve that is easy to process, can prevent loosening of nuts, and can be easily assembled. [Structure] Cutout recess 9 formed on the outer peripheral surface of the connecting member 4
By engaging the engagement protrusion 11 formed on the washer 10 and bending and locking a part of the washer 10 with a part of the nut 8, loosening of the nut 8 is prevented and the airtightness is improved. It is designed to hold.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed for tire tubes used in large vehicles such as trucks and buses. Regarding the lub, in more detail, it effectively prevents the nut from loosening due to vibration etc. during use. This invention relates to improvements in valves for tubes.

0002

[Conventional technology]

Conventionally, as a tube valve, for example, as shown in FIG. A metal device with a connecting hole 2 in the center and a male thread 3 on the outer circumferential surface. One end of the connecting member 4 is vertically buried and a rubber spout 5 is connected to the connecting member 4. A metal stem 7 whose distal end 7a is removably fitted into the connecting hole 2 via a packing 6. , tighten the metal connecting member 4 and the tip 7a of the metal stem 7 in a fitted state. It consists of a nut 8 for fixing.

0003 However, in such a conventional tube valve, the distal end 7 of the metal stem 7 a is simply tightened and fixed with the nut 8, especially for preventing the metal stem 7 from rotating. Since there is no stopper, the metal stem 7 rotates and the nut is rotated accordingly. There was a problem in that the valve 8 became loose and had a serious effect on the airtightness of the valve. Therefore, in order to prevent the metal stem 7 from rotating, for example, As disclosed in Japanese Patent No. 9433, the connection hole with the rubber spud is formed into a non-circular shape. Tube valves such as Use a washer that can lock the nut to securely secure the valve stem. A tube valve has been proposed that completely prevents the nut from loosening by There is. In addition, the advantage of this type of tube valve is that the rotational direction of the tire is The valve orientation can be changed without removing the tube during installation. Ru.

0004

[Problem that the invention attempts to solve] However, the former tube with a non-circular connection hole with the rubber spud The valve can stop the rotation of the metal stem 7, but mold processing is required. etc., the number of manufacturing processes increases significantly, resulting in a decrease in productivity and an increase in costs. There's a problem.

[0005] In addition, the latter tube valve completely prevents the nut from loosening. Even if it is possible to prevent the rotation of the metal stem 7, it is not possible to prevent the rotation of the metal stem 7. In this case, the position where the nut was tightened and the position of the protrusion on the washer had to be finely adjusted. There was a problem that the attachment process was confusing. This idea was devised by focusing on such conventional problems, and it is easy to process. Valve for tubes that prevents nuts from loosening and makes assembly work easy. The purpose is to provide a

[0006]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, this invention has a structure that is applied to the outer peripheral surface of the metal connection member in the axial direction. Forming at least one or more notched recesses, and corresponding to the notched recesses. , an engaging protrusion is formed on the inner diameter of the washer that is larger than the outer diameter of the nut, and the washer is With the metal connecting member and the tip of the metal stem fitted together through the nut, After tightening and fixing, a part of the washer is bent along the side of the nut. This is a summary of what has been achieved.

[0007]

[Effect of invention]

This invention is constructed as described above, and has a cutout recess formed on the outer peripheral surface of the connecting member. , engages the engaging protrusion formed on the washer, and locks a part of the nut and the washer. This prevents the nut from loosening and maintains airtightness. This is what I did.

[0008]

[Example of idea]

Hereinafter, embodiments of this invention will be described based on the accompanying drawings. Note that the same components as those in the conventional example are given the same reference numerals, and the description thereof will be omitted. Fig. 1 shows a nut at the connection part between the connecting member 4 and the metal stem 7, in which this invention is implemented. 2 is a sectional view taken along the line A-A in FIG. One end of the member 4 is buried in the center of the upper surface of the rubber seat 1 and stands vertically.

[0009] The connecting member 4 has a connecting hole 2 in the center and a male thread 3 formed on the outer peripheral surface. This constitutes a rubberized spat 5. Male screw 3 of the connecting member 4 At least one or more cut recesses 9 are formed in the axial direction on the outer peripheral surface formed with There is an intervening space between the upper surface of the rubber seat 1 and the nut 8 corresponding to the cut recess 9. An engaging protrusion 11 that can be engaged with the inner diameter portion of the washer 10 is formed.

0010 The shape of the washer 10 is larger than the outer diameter of the nut 8. With the metal connecting member 4 and the tip 7a of the metal stem 7 fitted together through the After tightening and fixing with the nut 8, a part 10a of the washer 10 is attached to the side of the nut 8. The nut 8 is prevented from rotating by bending along the same direction. Note that the shape of the washer 10 is not limited to a circular shape, and other shapes are also possible. Ru.

[0011] To assemble the tube valve configured as above, first place it on the rubber seat 1. The washer 10 is fitted onto the connecting member 4 which is erected at the center of the surface, and the washer 10 is provided. The engaging protrusion 11 and the cutout recess 9 of the connecting member 4 are made to face each other and engage with each other. and A metal stem 7 is attached to the upper end of the connecting member 4 via one or more packings (not shown). With the tip 7a engaged, tighten and fix with the nut 8, and then tighten one of the washers 10. The nut 8 is rotated by bending the portion 10a along the side surface of the nut 8. to prevent

0012 With this configuration, the washer 10 and the connecting member 4 are connected to the engaging protrusion 11. The washer 10 and the nut 8 are always locked with the bent recess 9. As a result, loosening of the nut 10 can be prevented, and at the same time, an airtight It is also possible to maintain gender.

[0013]

[Effect of the idea]

In this invention, as described above, at least the outer circumferential surface of the metal connecting member is One or more notched recesses are formed, and the nut is arranged in a manner corresponding to the notched recesses. An engaging protrusion is formed on the inner diameter of the washer, which is larger than the outer diameter of the Tighten and secure with a nut while the metal connection member and the tip of the metal stem are fitted together. After that, a part of the washer was bent along the side of the nut. It is easy to process, prevents nuts from loosening, and prevents air leaks. This has the effect of making assembly work easier.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal cross-sectional view of a connecting portion between a connecting member and a metal stem in which this invention is implemented.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view of a connecting portion between a conventional connecting member and a metal stem.

[Explanation of symbols]

1 Rubber seat 2 Connection hole 3 Male thread (screw) 4 Connection member 5 Spat with rubber 6 Packing 7 Metal stem 7a Tip of metal stem 8 Nut 9 Notch recess 10 Washer 11 Engagement protrusion

Claims (1)

[Scope of utility model registration request] Claim 1: A rubber spat, which is made of a metal connection member having a connection hole in the center and a threaded portion formed on the outer peripheral surface, and one end of which is buried vertically in the center of a rubber seat; A metal stem whose tip part removably fits into the connection hole,
In a tube valve comprising a nut that is tightened and fixed via a washer in a state where the metal connecting member and the distal end of the metal stem are fitted together, a shaft is provided on the outer peripheral surface of the metal connecting member. At least one notched recess is formed in the direction, and an engaging protrusion is formed in the inner diameter of the washer, which is larger than the outer diameter of the nut, corresponding to the notched recess, and the nut is inserted through the washer. A valve for a tube, characterized in that, after a metal connecting member and a distal end of a metal stem are fitted and fixed by a nut, a part of the washer is bent along a side surface of the nut. .