JP3328909B2 - Valve chuck and method for inflating tire air using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve chuck for facilitating the work of filling a tire with air, and a method of filling the tire with air. More specifically, the present invention relates to a valve chuck that can automatically hold and release an air injection valve of a tire and a method of filling a tire with air.

[0002]

2. Description of the Related Art Conventionally, when air is injected into a tire, a valve chuck provided with a member for pressing and releasing a check valve of an air injection valve is manually pressed against the valve. Since the injection is performed while maintaining this state, the air injection operation is troublesome (see Japanese Utility Model Laid-Open No. 24470/1993 as a related prior art).

Accordingly, an object of the present invention is to provide a valve chuck capable of easily filling a tire with air and a method of filling a tire with air using the valve chuck.

[0004]

To achieve the above object, a valve chuck according to the present invention is connected to an air injection valve of a tire having a check valve in a base and injects air into the tire. A ring-shaped packing member formed of a material that can be elastically deformed and capable of being separated from the outer peripheral surface of the valve by pressure bonding, and a bar-shaped opening member for opening the check valve is erected, Sliding in housing
Freely inserted and driven by high pressure air from the drive source
Consists of that piston, packing by pressing the said packing
A pressing body that presses the check valve with the opening member to open, while sealing the gap between the valve and the valve chuck by pressing the inner diameter surface of the valve against the outer circumferential surface of the valve.
And through the opened the check valve with an air passageway for communicating the inside portion and the outside of the high pressure air source tires, the pressing member
Forming a piston inside the tire via the check valve
Air introduction hole that forms part of the air passage communicating with
Have been . According to this configuration, since the pressing member is provided with the opening member, when the pressing member is driven, the operation of holding the outer peripheral surface of the valve with the packing and the operation of opening the check valve with the opening member are simultaneously performed. Therefore, it is not necessary to hold the valve chuck of the present invention using another tool while the check valve is opened. When the driving of the pressing body is stopped, the compression by the packing is also completed, so that the valve chuck can be detached from the air injection valve. Moreover, the above
The pressing body is slidably inserted into the housing and has a drive source.
Consisting of a piston driven by high-pressure air from the
Therefore, the pressing force can be easily obtained with a simple configuration. Ma
The source of high-pressure air injected into the valve is
It can also be used as a
It can be simplified.

[0005]

In the embodiment of the present invention, a cover is detachably attached to the housing, and the packing is held by the cover. According to this configuration, when the packing is deteriorated, replacement is easy.

In an embodiment of the present invention, a part of the air passage is formed by a nipple which is attached to the piston and is connected to an air conduit for introducing the high-pressure air into the air introduction hole. The housing is provided with a through-hole through which the nipple that moves integrally with the piston passes and that allows the nipple to move integrally with the piston. According to this configuration, the air conduit and the air introduction hole are connected via the nipple, and high-pressure air can be supplied from the outside to the inside of the tire.

[0008] In the tire air filling method according to the present invention, high pressure air is supplied from the air passage into the tire by using the above-mentioned valve chuck and pressing the packing by the pressing body to seal between the valve and the valve chuck . Is to be injected . According to this method, since the outer periphery of the valve is sealed by the packing, the high-pressure air from the air passage does not leak out of the valve and is easily filled into the tire. Also, since the packing is pressed against the valve and the valve chuck is held, it is not necessary to hold the valve chuck using another tool during the air filling operation, and the filling operation is facilitated.

Further , according to the method for filling air with a tire according to the embodiment of the present invention , the air injection into the tire is completed.
Chi, to seal between the pressing member by the packing to press the valve and the valve chuck, in a state where high-pressure air into the air introduction hole is present, by releasing the pressing of the packing by the pressing member , High pressure in the air inlet
Air pressure releases valve chuck from valve
It is something to make . According to this method, at the same time that the pressing of the packing by the pressing body is released, the pressing body is instantly retracted by the pressure of the high-pressure air supplied to the air introduction hole in the pressing body, and the check valve is closed. I do.

[0010]

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In FIG.
The valve chuck VC of the present invention has a substantially columnar appearance in which the cover 6 is attached to the opening of the housing 8, and has an insertion port for inserting the air injection valve V (see FIG. 3) into the center of the cover 6. 7 are formed.

As shown in FIG. 3, the air injection valve V is
A cylindrical base 21 fixed to a tire tube in a tire (not shown) and supported by a rim 23 of the tire.
Is provided with a check valve 22, and the check valve 22 is closed by the pressure inside the tire. As shown in FIG.
The pressing body 2 formed of a bottomed cylindrical piston is slidably inserted into the housing 8. A cover 6 is detachably attached to the opening of the housing 8, and the packing 1 is held inside the cover 6.

The packing 1 shown in FIG. 2 is made of a material which can be elastically deformed by an external pressure and is formed in a circular shape. The axial length and cross-sectional area are slightly larger than the outer diameter of the base 21, and the axial length and the cross-sectional area are in wide contact with the outer peripheral surface of the base 21 (FIG. 3) when the inner diameter surface 1 d is reduced in diameter by the compressive force applied in the axial direction. It is appropriately selected so as to secure a sufficient grip force. The packing 1 not only grips the base 21 (FIG. 3), but also functions as a sealing member that seals the outer periphery of the base 21 (FIG. 3). As a material of the packing 1, various synthetic rubbers, natural rubbers, and the like can be used.

An insertion opening 7 having a diameter substantially equal to the inner diameter surface 1d of the packing 1 is formed at the center of the cover 6 supporting the packing 1, and an annular groove 6b formed at the back of the insertion opening 7 is formed. , One end face 1b of packing 1 and outer peripheral face 1
c is fitted so that it contacts. The pressed end surface 1a, which is the other end surface of the packing 1, is in contact with the piston 2. Therefore,
The packing 1 can be displaced only in the inner diameter direction. The cover 6 is formed with a male screw portion 6 a and is screwed to the female screw portion 8 a of the housing 8.

The inner and outer diameters of the upper end face 2a of the piston 2 are substantially the same as the inner and outer diameters of the pressed end face 1a of the packing 1 in a natural state, and the upper outer circumference prevents excessive compression of the packing 1. Stopper 2c is formed for
Seal rings 12 and 13 for sealing between the outer surface and the housing 8 are fitted. An air introduction hole 5 is formed by a non-through hole formed at the center of the bottomed cylindrical piston 2, and a mounting hole 2 d communicating with the air introduction hole 5 penetrates a side wall of the piston 2. The nipple 9 is fitted into the mounting hole 2d. Further, a through hole 10 communicating with the mounting hole 2d is formed in the housing 8. The air introduction holes 5, the attachment holes 2d, and the nipples 9 form air passages 5, 2d, 9 for communicating the inside of the tire with an external high-pressure air source 4, which is a driving source described later.

The housing 8 containing the piston 2 is screwed to the cover 6 by a female screw portion 8a. Also, the through hole 1 on the side surface of the housing 8
Numeral 0 is an elongated hole extending in the axial direction, which allows the nipple 9 to move with the axial movement of the piston 2. Further, a communication hole 8b communicating with the connection nozzle 11 is provided in the bottom surface 8c of the housing 8, and the connection nozzle 11 is fixed to the outer peripheral surface of the housing 8 by, for example, welding, and
It is connected to the.

As shown in FIG. 1, the high-pressure air source 4 and the connection nozzle 11 are connected by a high-pressure inlet pipe 17, and in the middle thereof, an electromagnetic three-way valve 16 which takes three positions of open, closed and open to the atmosphere is provided. Is provided. In addition, the nipple 9 is connected via an air conduit 14 to the same high-pressure air source 4 as the high-pressure air source 4 of the piston 2.
To the solenoid valve 15 in the middle of the air conduit 14.
Is connected. The solenoid valves 15 and 16 are switch-controlled by a controller 19 which operates in response to a command signal from a manual start switch 18. The pressure of the air introduced from the high-pressure air source 4 is desirably 6 to 8 kg / cm ² .

As shown in FIG. 3, an opening member 3 is provided upright at the center of the inner bottom surface 2b of the piston 2. The opening member 3 has a rod shape, and its outer diameter is smaller than the inner diameter of the base 21, and is large enough to allow air to pass between the inside of the base 21 and the outer periphery of the opening member 3. Therefore, while the opening member 3 is pressing the valve rod 22 a of the check valve 22, the inside of the tire communicates with the air introduction hole 5 via the check valve 22 and further through the air introduction hole 5. Communicate with the outside world.

Next, an air filling method using the above-described valve chuck will be described. First, the rim 2 of the tire shown in FIG.
The base 21 of the air injection valve V provided in 3 is inserted into the insertion port 7 of the valve chuck VC, and the start switch 18 in FIG. 1 is turned on. Thereby, the controller 19 operates to open the electromagnetic three-way valve 16 and supply high-pressure air for clamping from the high-pressure air source 4 to the valve chuck VC via the connection nozzle 11 in FIG. The supplied high-pressure air first enters the space S between the inner bottom surface 8c of the housing 8 and the outer bottom surface 2e of the piston 2, and the piston 2
Push up. At the same time as the piston 2 advances toward the packing 1, the opening member 3 also advances toward the check valve 22, and as shown in FIG. At the same time, the check valve 22 is opened.

The controller 19 in FIG. 1 opens the electromagnetic on-off valve 15 at a timing delayed by a predetermined time from the opening of the electromagnetic three-way valve 16, and this time fills the air introduction hole 5 in FIG. Supply high pressure air for At this time, since the packing 1 has already been reduced in diameter and pressed against the base 21,
The space between the air injection valve V and the valve chuck VC is well sealed, and high-pressure filling air is injected into the tire from the check valve 22 through the air introduction hole 5.

After air is filled for a certain period of time set by the controller 19 in FIG. 1 and the pressure is checked by a pressure gauge (not shown), the controller 19 opens and closes the on-off valve 1.
5 is closed, and the air injection into the tire is completed. Then, the electromagnetic three-way valve 16 of FIG. 1 is switched to open to the atmosphere, and the pressure of the high-pressure air for clamping is released. Thereby, the piston 2 of FIG. 4 is retracted, the compression of the valve V by the packing 1 is released, and the check valve 22 is closed, and the state shown in FIG. 3 is obtained. Subsequently, the on-off valve 15 is opened by the controller 19 of FIG.
When the air is introduced into the air introduction hole 5, the inner bottom surface 2b of the piston 2
Due to the pressure difference between the inside of the air introduction hole 5 and the outside of the valve chuck VC acting on the valve chuck VC, the valve chuck VC instantaneously repels and separates from the air injection valve V.

[0021]

As described above, according to the valve chuck of the present invention, the packing is reduced by the piston and the packing is pressed against the outer peripheral surface of the valve, whereby the valve chuck is mounted on the valve and the valve chuck is mounted. And the valve can be hermetically sealed. Further, since the piston is provided with an opening member for opening the valve and the piston and the opening member are simultaneously operated, the operation of pressing the packing by the piston and the operation of opening the check valve are simultaneously performed.

According to the tire air filling method of the present invention, the packing seals the space between the tire and the air injection valve of the valve chuck simultaneously with the mounting of the above-mentioned valve chuck. Can be filled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a valve chuck according to an embodiment of the present invention.

FIG. 2 is an explanatory sectional view of the valve chuck of FIG. 1;

FIG. 3 is an explanatory diagram of an operation in a state where the tire is connected to an air injection valve, and shows a state where the air injection valve is closed.

FIG. 4 is an explanatory diagram of an operation in a state where the tire is connected to an air injection valve, and shows a state where the air injection valve is opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... packing, 1a ... pressed end surface, 1d ... inner diameter, 2 ... piston (pressed body), 2a ... upper end surface, 2b ... inner bottom surface, 3
... Opening member, 4 ... Drive source, 5 ... Air introduction hole (air passage), 6 ... Cover, 7 ... Inlet, 8 ... Housing, 9 ...
Nipple (air passage), 10: through hole, 14: air conduit, 21: base, 22: check valve, VC: valve chuck, V: air injection valve

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-141719 (JP, A)

Claims (5)

(57) [Claims] 1. A valve chuck connected to an air injection valve of a tire having a check valve in a base for injecting air into the tire, wherein the valve chuck is formed of an elastically deformable material into an annular shape, and the valve has a ring shape. A packing capable of being press-bonded to and separated from the outer peripheral surface of the housing, a bar-shaped opening member for opening the check valve is erected , and is slidably inserted into the housing to receive a signal from a driving source.
It consists of a piston driven by high-pressure air , presses the packing and presses the inner surface of the packing against the outer surface of the valve to seal between the valve and the valve chuck, and opens the check valve by the opening member. pressing body for pressing to open, and through the opened the check valve with an air passageway for communicating the inside portion and the outside of the high pressure air source tires, the piston forming said pressing member, wherein the check valve Through
An air guide that forms part of an air passage that communicates with the tire interior
A valve chuck with an inlet hole . 2. The valve chuck according to claim 1 , wherein a cover is detachably attached to the housing, and the packing is held by the cover. 3. The nipple according to claim 1 , wherein a part of the air passage is formed by a nipple that is attached to the piston and connected to an air conduit that introduces the high-pressure air into the air introduction hole. A valve chuck in which a housing is provided with a through hole through which the nipple that moves integrally with the piston passes and that allows the nipple to move integrally with the piston. Wherein in a state wherein the claim 1 with a valve chuck according to any one of 3, was sealed between the valve and the valve chuck presses the packing by the pressing member,
A method for filling a tire with air, wherein high-pressure air is injected into the tire from the air passage. 5. The method according to claim 4, wherein the tire is provided with an empty space.
After the air injection is completed, the packing is pressed by the pressing body to seal between the valve and the valve chuck,
In a state where high-pressure air is present in the air introduction hole , by canceling the pressing of the packing by the pressing body ,
Valve chuck by the pressure of the high pressure air in the air inlet holes
Method for releasing air from a valve .