JP2013163477A - Air valve fastening tool of wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air valve fastening tool for use in fastening a fixed nut of an out set type air valve attached to a vehicle wheel, which easily fastens the fixed nut with a predetermined fastening torque without removing a tire.SOLUTION: An air valve fastening tool includes: a cylindrical socket 1 having a circular wrench 11 formed in an inner peripheral section of a top end and fixed to a fixed nut 7 of an air valve 6, and a nut section 12 provided in an outer circumferential section of a base end for hooking a torque wrench 3; a driver-like presser 2 having a coupler 22 provided at the top end and screwed in a valve cap attaching screw 61 at a tip of a stem 60 of the air valve 6, and which is inserted into the socket from a base end side of the socket 1. The socket 1 is mounted on the fixed nut 7. The coupler 22 is screwed into the valve cap attaching screw 61 by inserting the presser 2 into the socket 1, to rotate the socket 1 by the torque wrench 3.

Description

  The present invention relates to an air valve tightening tool for a wheel, and more particularly to a tightening tool capable of tightening a fixing nut of an air valve attached to a wheel of a wheel in a tire mounted state.

  In recent years, an ISO wheel that is used for automobile wheels is mainly an ISO type in which a hub is fitted into a hub hole of a disc to perform axis alignment. Moreover, as a brake system, since it is excellent in safety and durability, many disk brakes are also employed in large vehicles.

  On the other hand, instead of the conventional inset method, the mounting structure of the air valve attached to the wheel is a so-called outset method in which the stem (valve tubular main body portion) is directly penetrated from the tire side of the rim to the decorative window of the disc. The new ISO system) is the mainstream. This is because the stem interferes with the pad of the disc brake device in an inset type (JIS method) air valve having a structure in which the stem is penetrated to the inner peripheral side (wheel shaft side) of the rim and bent to the decorative window of the disc. Because.

  The outset type air valve uses a so-called straight valve with a stem that is straight tubed or slightly bent into a hex shape to allow the stem to be inserted into a valve hole that passes directly from the tire side of the rim toward the decorative window of the disc. Is done. Such an air valve has an enlarged diameter portion at the base end of the stem, the stem is inserted into the valve hole from the tire side of the rim, and a fixing nut is screwed from the outside to a portion protruding from the decorative window. Is fixed to the wheel by tightening with a constant torque (see Patent Document 1).

  As for the air valve installation tool, when pulling out the stem inserted into the valve insertion hole from the tire side of the rim to the disk side, the foldable tip is screwed to the cap attachment screw at the stem tip, and the wheel flange part A mounting tool is disclosed in which the stem is pulled out using the lever principle as a fulcrum (see Patent Document 2).

JP 2008-1222 A JP 2010-254224 A

  By the way, in the air valve, when the fixing nut is loosened, there is a case where air leakage of the tire occurs little by little due to vibration during traveling. Therefore, it is necessary to tighten the fixing nut of the air valve so that it does not become loose during daily inspection.

  However, since the outset type air valve is a straight valve and it is difficult to grip the stem itself, once the tire is mounted on the wheel, the stem will be rotated even if the fixing nut is rotated and tightened sufficiently. There is a problem that can not be. In other words, if the fixing nut is loosened, the tire must be removed, and the fixing nut must be tightened by pressing the base end of the stem, especially for daily inspection of large vehicles such as trucks and buses. Cost.

  The present invention has been made in view of the above circumstances, and an object thereof is a tool used when tightening a fixing nut of an outset type air valve attached to a wheel of a wheel. An object of the present invention is to provide an air valve tightening tool capable of easily tightening a fixing nut of an air valve with a specified tightening torque without removing it.

  In order to solve the above-described problems, in the present invention, the socket of the air valve is attached to the fixing nut by relatively inserting the stem of the air valve into the cylindrical socket in which a ring-shaped wrench is formed on the inner periphery of the tip. A nut provided on the outer periphery of the base end of the socket when a screw-like presser is inserted from the base end side of the socket and the coupler at the tip is screwed onto the valve cap mounting screw at the tip of the stem and the stem is fixed By rotating the socket by hooking a torque wrench on the part, only the fixing nut was tightened without rotating the stem.

  That is, the gist of the present invention is a tightening tool used when tightening a fixing nut of an outset type air valve attached to a wheel, and a ring-shaped wrench that fits into the fixing nut of the air valve has a tip inner peripheral portion. And a nut that hooks a torque wrench on the outer periphery of the base end, and a coupler that is screwed into a valve cap mounting screw at the end of the stem of the air valve. The air valve tightening tool includes a driver-like presser inserted into the socket from the end side.

  According to the air valve tightening tool of the present invention, it is possible to easily tighten only the fixing nut of the air valve with a specified tightening torque without rotating the stem in a state where the tire is mounted. Therefore, by using the air valve tightening tool of the present invention, daily inspection of large vehicles such as trucks and buses can be performed very easily.

It is the side view which fractured | ruptured and showed the main member of the air valve clamping tool which concerns on this invention, and a part of wheel. It is the perspective view which showed the usage method of the air valve fastening tool which concerns on this invention. It is the perspective view which showed the usage method of the air valve fastening tool which concerns on this invention. It is the perspective view which showed the usage method of the air valve fastening tool which concerns on this invention.

  An embodiment of an air valve tightening tool (hereinafter abbreviated as “tightening tool”) according to the present invention will be described with reference to the drawings.

  The tightening tool of the present invention is a tool used when tightening a fixing nut 7 of an outset type air valve 6 attached to a wheel 4 of a wheel, as shown in FIG. It comprises a driver-like presser 2.

  The outset type air valve 6 is a so-called straight valve in which a stem 60 (air valve main body portion) is a straight tube or a tube having a slight bent shape, and from the tire 5 side of the rim 41 to the decoration window 43 of the disk 42. The stem 60 is inserted into the valve hole penetrated toward the end, and the enlarged diameter portion of the stem 60 base end is fitted into the valve set recess on the tire 5 side peripheral surface of the rim 41, and the fixing nut 7 is inserted into the protruding portion of the stem 60 from the outside. Is attached to the wheel 4 by screwing.

  In the tightening tool of the present invention, as shown in FIG. 1, the socket 1 includes a cylindrical main body 10, and an annular wrench 11 that engages with the fixing nut 7 is formed on the inner periphery of the tip of the socket. A nut portion 12 for hooking the torque wrench 3 is provided on the outer peripheral portion of the base end of the socket 1. Usually, the socket 1 is manufactured by molding stainless steel or carbon steel by a cold forging method, and is designed to have a length of about 50 to 200 mm and an inner diameter of about 15 to 20 mm.

  The ring-shaped wrench 11 at the inner periphery of the tip of the socket 1 is configured as a hexagonal ring wrench that fits into the fixing nut 7 of the air valve 6 or a 12-point ring-shaped wrench as shown. In particular, when a 12-point ring-type wrench is employed, each time the socket 1 is rotated 30 degrees, it is engaged with the fixing nut 7, so that when the torque wrench 3 is hooked on the nut portion 12 as described later, the nut portion 12 can be held at an easy-to-operate angle, and the tightening operation becomes easier. The standard of the above-described ring-shaped wrench 11 is, for example, the standard of the Japan Automobile Tire Association (JATMA) and corresponding to the nut of V9-07-4 (nominal diameter M14).

  The nut portion 12 on the outer peripheral portion of the base end of the socket 1 has a hexagonal columnar outer shape similar to a normal hexagon nut. The standard of said nut part 12 is normally set to the magnitude | size corresponded to 19-25 mm by the mouth width (two surface width of a nut) of a wrench.

  On the other hand, as shown in FIGS. 1 and 2, the presser 2 includes a coupler 22 that is screwed into a valve cap mounting screw 61 at the tip of the stem 60 of the air valve 6 at the tip. Specifically, as shown in FIG. 1, the presser 2 is configured by providing a grip 21 at the base of the shaft 20 and providing the coupler 22 at the tip of the shaft 20. The shaft 20 and the coupler 22 are usually made of stainless steel or carbon steel. The coupler 22 is formed by forming a female screw on the inner peripheral surface of a bottomed cylindrical member having an open end. The length of the presser 2 is about 100 to 200 mm, and the standard of the female screw of the coupler 22 is a standard for screwing onto the valve cap mounting screw 61. The standard of the valve cap mounting screw 61 is, for example, 8V1 in the standard of Tire Rim Association (TRA) and the standard of JATMA. The base of the presser 2 can be configured in various structures that can be gripped, such as a T-shaped handle, instead of the grip 21.

  The tightening tool of the present invention is composed of the socket 1 and the presser 2 as described above. The socket 60 is attached to the fixing nut 7 by relatively inserting the stem 60 of the air valve 6. The presser 2 is inserted into the socket cylinder from the base end side, the coupler 22 is screwed onto the valve cap mounting screw 61, and the socket 1 is rotated by the torque wrench 3.

  That is, in the operation of tightening the fixing nut 7 of the air valve 6 using the tightening tool of the present invention, first, as shown in FIGS. 2 and 3, the stem 60 of the air valve 6 is relatively moved to the cylindrical socket 1. In other words, by putting the socket 1 on the stem 60 of the air valve 6, the annular wrench 11 at the inner periphery of the tip of the socket is attached to the fixing nut 7. Next, the presser 2 is inserted into the socket cylinder from the base end side of the socket 1, and the coupler 22 at the tip of the presser 2 is screwed into the valve cap mounting screw 61 at the tip of the stem 60. As shown in FIG. 4, in a state where the stem 60 is fixed by the presser 2, the torque wrench 3 is hooked on the nut portion 12 provided on the outer periphery of the base end portion of the socket 1, for example, the wheel 4 of the large vehicle. In some cases, the fixing nut 7 is tightened with a tightening torque of 9.0 to 14.6 Nm. Thus, only the fixing nut 7 can be tightened without the stem 60 being circulated.

  As described above, when the tightening tool of the present invention is used, only the fixing nut 7 of the air valve 6 can be simply tightened with the specified tightening torque without rotating the stem 60 with the tire 5 mounted. Can be tightened. Therefore, by using the tightening tool of the present invention, daily inspection of large vehicles such as trucks and buses can be performed very easily without removing the tires 5 from the wheels 4.

DESCRIPTION OF SYMBOLS 1: Socket 11: Ring wrench 12: Nut part 2: Presser 22: Coupler 3: Torque wrench 4: Wheel 41: Rim 42: Disc 43: Decoration window 5: Tire 6: Air valve 60: Stem 61: Valve cap attachment screw 7: Fixing nut

Claims (2)

  A tightening tool used to tighten the fixing nut of an outset type air valve attached to a wheel. A ring-shaped wrench that fits into the fixing nut of the air valve is formed on the inner periphery of the tip, and the torque wrench is pulled. A cylindrical socket with a hooked nut on the outer periphery of the base end and a coupler that engages with the valve cap mounting screw at the tip of the air valve stem are inserted into the socket from the base end of the socket. The air valve tightening tool characterized by including a driver-like presser.   The air valve tightening tool according to claim 1, wherein the annular wrench at the tip of the socket is a 12-point annular wrench.

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