JPH0321282Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an inflator that automatically fills air into tubeless tires, and particularly relates to an inflator that can fill air into tubeless tires of various sizes.

Prior Art An inflator that automatically fills air into a tubeless tire on a production line is arranged concentrically with a center cone 5 for centering the disk wheel 1, as shown in FIG. It has a disk seal 6 that presses the outer circumference of the rim 2 of the disk wheel 1, and a tire seal 7 that is provided on the outer circumference of the disk seal 6 and presses the entire circumference of the sidewall 4 of the tubeless tire 3. This inflator uses a center cone 5 to center the tire that has been lifted up on a table 8, and then a disk seal 6.
The tire seal 7 presses the rim 2 of the disc wheel 1 to seal it, and the tire seal 7 presses the sidewall 4 to form a gap between the rim 2 and the sidewall 4. In this state, air is supplied from the gap. and fill it. When the tire 3 is filled with air, the tire 3 inflates and the tire seal 7
rises due to the pressure, and sidewall 4 moves towards rim 2.
Air filling is completed when it comes into close contact with the

By the way, the above-mentioned inflator can only fill air with one type of tire, so in order to automatically supply air to tires of various sizes on the line, it is necessary to install a large number of dedicated inflators according to the size of each tire. First, as the equipment became larger, equipment costs and power costs increased.

Therefore, an inflator that was able to fill air into multiple tires of different sizes was developed in 1976.
-Disclosed and proposed in Publication No. 14706.
As shown in FIG. 4, this includes a center cone 9 that centers the disc wheel 1, and a first tire seal 10 that is provided on the outermost periphery around the center cone 9 and presses the sidewall 4 of the tire 3. and a second tire seal which is provided inside the first tire seal 10 and presses the sidewall 4' of a small diameter tire 3' or the rim 2 of a large diameter tire.
tire seal 11 and a second tire seal 11
The disc seal 12 is provided inside the tire and presses against the rim 2' of the small diameter tire.

When filling air into a large-diameter tire 3, the inflator first centers the disc wheel 1 with a center cone 9, as shown in FIG. 2 and the sidewall 4 with the first tire seal 10 to form a gap between both 2 and 4, and air is supplied from this gap to fill it with air as in the conventional case. Furthermore, when supplying air to a small diameter tire 3', as shown in FIG. A seal 11 presses the side wall 4' to form a gap between the two 2' and 4', and air is supplied from this gap to fill it with air as in the conventional case.

Problems to be Solved by the Invention Conventional general-purpose inflators use the first tire seal 10 when supplying air to a large tire 3.
and the second tire seal 11 and the sidewall 4.
Since the first tire seal 10 presses the side of the sidewall 4 close to the rim 2, a gap is formed between the tire 3 and the rim 2.
However, when supplying air to a small-diameter tire 3', the disk seal 12 presses the rim 2'.
Since the sidewall 4' is pressed by the first tire seal 10 and the second tire seal 11,
Since the sidewall 4' is pressed at a position far away from the rim 2', the sidewall 4' is not pushed in enough, making it impossible to reliably form a gap between the rim 2' and the tire 3'. It was difficult to supply air reliably. Furthermore, when air is supplied to the tire 3', if a certain amount of air is supplied to the tire 3', even if the amount of air filling is insufficient, the bead part 13 of the tire 3' will come into close contact with the rim 2', making it impossible to fill the air. There was a problem when the quantity was insufficient.

Means to Solve the Problem This idea consists of a main body column, a center cone that is movable up and down at the center of the main body column and that centers the disc wheel, and a center cone that surrounds the center cone on the outer periphery of the main body column. A first disc seal and a second disc seal are provided concentrically and movably up and down to press the rim of the disc wheel;
A first tire seal that is installed vertically on the main body column between the disc seal and presses the sidewall of the tubeless tire, and a second disc seal that is movable up and down relative to the second disc seal. a second tire seal that is provided and presses a sidewall of the tubeless tire; a first air passage provided between the first disc seal and the first tire seal; a second disc seal; and a second air passage provided between the tire seal and the second tire seal.

Function When filling air into a small-diameter tire, this idea uses the first disc seal and the first tire seal to form a gap between the rim and the tire so that air can flow out of the tire from the first air passage. When air is supplied to fill a large diameter tire, the second disc seal and the second tire seal are used to form a gap between the rim and the tire to fill the second air. Air is supplied from the passage into the tire to fill it.

Embodiment FIG. 1 is a drawing showing an embodiment of the present invention, in which 20 is a main body column, which has a cylindrical shape;
A disk-shaped top plate 21 is integrally formed on the upper surface, and a ring-shaped support plate 22 of a predetermined size is integrally formed on the lower surface.

23 is a movable frame arranged in the main body column 20 so as to be able to move up and down in parallel with the top plate 21; 24 is a cylindrical first disk seal that presses the rim 2' of the small-diameter disk wheel 1'; The movable frame 23 is integrally hung inward by a predetermined distance from the outer periphery, and a pad 25 is attached to the bottom surface of the movable frame 23 for pressing and sealing the rim 2' of a 10-inch disc wheel 1'. be. Further, a cylindrical guide tube 27 is integrally attached to the lower outer peripheral surface of the first disk seal 24 via a reinforcing rib 26.

Reference numeral 28 denotes a center column for centering the disc wheel, the lower end of which is formed into an inverted conical shape, and is provided in the guide tube 27 so as to be movable up and down via a spacer 29, and the flange 30 at the upper end is connected to the guide tube. 27, and a spring 31 is compressed and interposed between the lower part of the center cone 28 and the guide cylinder 27, and is constantly pushed downward so that its lower end protrudes below the lower end of the first disk seal 24. There is.

32 is a cylindrical second disc wheel that presses the rim 2 of the large diameter disc wheel 1;
The disk seals 24 are arranged concentrically at appropriate intervals on the outer circumferential side of the disk seals 24 of the movable frame 23.
Support rods 33 are vertically installed at multiple locations on the outer periphery of the
The pad 34 is integrally connected to the lower end of the disc wheel, and a pad 34 is attached to the lower surface of the disc wheel for pressing against and sealing the rim of the disc wheel. The pad 34 is formed into a stepped shape with stepped portions corresponding to each size so that it can press against the rim of a 12-inch, 13-inch, or 14-inch disc wheel, for example. 35 is a cylinder provided around the support rod 33 and between the movable frame 23 and the support plate 22 of the main body column 20, whose upper end is integrally connected to the movable frame 23; It moves up and down.

A cylindrical first tire seal 36 presses and seals the sidewall 4' of the small-diameter tire 3', and is arranged between the first disk seal 24 and the second disk seal 32, and has an upper end. It is provided vertically on the inner peripheral edge of the support plate 22 of the main body column 20. The lower end of the first tire seal 36 is positioned slightly above the lower end positions of the first disc seal 24 and the second disc seal 32 which are in the lowered position. A sealing member 37 having an L-shaped cross section is integrally attached to the lower inner circumferential surface of the first tire seal 36, and a first air passage is provided between the sealing member 37 and the inner circumferential surface of the first tire seal 36. 38, and nozzle holes 39 are formed at several locations on the lower surface of the sealing member 37 to blow out the air in the first air passage 38. Further, the inner peripheral surface of the sealing member 37 is brought into contact with the outer peripheral surface of the first disk seal 24 via a spacer 40, and guides the first disk seal 24 when it is raised or lowered.

41 is a cylindrical second tire seal that presses and seals the sidewall 4 of the large diameter tire 3;
The second disk seal 32 is arranged concentrically with an appropriate interval on the outer circumferential side, and the pressing part 4 at the lower end
1a is placed close to the second disk seal 32. This second tire seal 41 is attached to the cylinder 35
A ring-shaped connecting plate 44 is attached to the lower end of an intermediate rod 43 that is connected to a piston 42 that is housed in a piston 42 so as to be vertically movable, and that is mounted around a support rod 33 through the cylinder 35 and the support plate 22 so as to be vertically movable. It is connected and supported through. Further, the second tire seal 41 forms a second air passage 46 between the cylindrical partition wall 45 vertically provided on the inner peripheral edge of the connecting plate 44 and the second disc seal 32 . In the cylinder 35, pressurized oil is appropriately supplied to the upper and lower chambers of the piston 42, which causes the piston 42 to move up and down, thereby moving the second tire seal 41 up and down via the intermediate rod 43 and the connecting plate 44. Second
The lower end of the tire seal 41 is in the lowered position.
It is set to be located below the lower end of the disk seal 32 of.

A stopper member 47 is horizontally movably provided between the top plate 21 of the main body column 20 and the movable frame 23, and when it moves forward, it prevents the movable frame 23 from rising, and when it moves backward, it allows the movable frame 23 to rise.

When inflating the large-diameter tire 3 with air, the inflator having the above structure moves the stopper member 47 forward to fill the top plate 2 of the main body column 20, as shown in the figure.
1 and the movable frame 23 to prevent the movable frame 23 from rising. Next, cylinder 35
The inner piston 42 is lowered to cause the second tire seal 41 to protrude downward. In this state, the tire placed on a table or the like is raised. Then, first insert the center cone 28 into the center hole of the disc wheel 1.
The lower end enters to center the disc wheel 1, and then the second tire seal 41
the lower end of which hits the sidewall 4 of the tire 3 and pushes down the sidewall 4 relative to the rise of the tire 3 to form a gap between the tire 3 and the rim 2;
The tire 3 is raised until the rim 2 contacts the second disk seal 32. Then, the second disc seal 32 and the second tire seal 41 seal the rim 2.
After sealing and forming a gap between the tire 3 and the tire 3, air is supplied from the second air passage 46 into the tire 3 to fill it. When the tire 3 is filled with air, the internal pressure of the tire 3 increases and the second tire seal 41 resists the pressure of the cylinder 35.
When the end of the tire 3 comes into close contact with the rim 2, air filling is completed. When air filling is complete, lower the tire and perform the next operation.

When filling air into a small diameter tire 3',
As shown in FIG. 2, the stopper member 47 is moved back to allow the movable frame 23 to rise. Then, place a small diameter tire on the table and raise the table. Then, the lower end of the center cone 28 enters the center hole of the disc wheel 1' to center the disc wheel 1', and then the rim 2' comes into contact with the first disc seal 24 and pushes it up. Then, the movable frame 23
As a result, the second disk seal 32 also rises via the support rod 33, and at the same time, the second tire seal 41 also rises via the cylinder 35, piston 42, intermediate rod 43, and connecting plate 44, and the relative At this point, the first tire seal 36 protrudes and comes into contact with and presses the sidewall 4' of the tire 3', thereby forming a gap between the tire 3' and the rim 2'. Then, the first disc seal 24 comes into contact with the stopper 37a provided on the lower surface of the sealing member 37, and the first disc seal 24 stops rising, and the first disc seal 24 and the first tire seal 36 are connected to the rim. After sealing the tire 3' and the tire 3' and forming a gap therebetween, air is supplied from the first air passage 38 through the nozzle hole 39 to fill the tire 3'. When the tire 3' is filled with air, the tire 3' restores itself as the internal pressure increases, and the restoring force lowers the table, and when the tire 3' comes into close contact with the rim 2', air filling is completed. do. Note that at this time, since no pressure is applied inside the cylinder 35, the first disk seal 24 does not descend. When the air filling is completed, the table lowers, and at the same time the first disk seal 24, the second disk seal 32, and the second tire seal 4
1 goes down.

When a small-diameter tire 3' is raised to supply air, the second disc seal 32 and the second tire seal 41 come to interfere with the tire 3'; Since the tire seal 41 rises together with the first disk seal 24, it does not interfere with the tire 3'.
Air can be filled reliably.

Effects of the invention When filling air into a large-diameter tire, this invention uses a second disc seal and a second tire seal to form a gap between the rim of the disc wheel and the tire. When filling a tire with air, the first disc wheel and the first tire seal form a gap between the rim and the tire and fill with air, so it is possible to fill air into tires of different sizes. Therefore, the rim and tire can be pressed at close positions to form a gap, and air can be filled reliably and appropriately. In addition, since a single inflator can fill air into multiple types of tires, when filling air into multiple tires on a line, there is no need to arrange as many inflators as in the past, reducing equipment costs. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing an embodiment of the inflator according to the present invention, Fig. 2 is a sectional view of the main part showing the state during operation, Fig. 3 is a sectional view of the main part of a conventional inflator, and Fig. 4 The figure is a cross-sectional view of a main part of a conventional inflator that has versatility, and FIGS. 5 and 6 are cross-sectional views of main parts showing its operating state. 20... Body column, 21... Top plate, 23...
Movable frame, 24...first disk seal,
28... Center cone, 32... Second disk seal, 33... Support rod, 35... Cylinder, 36... First tire seal, 38... First
air passage, 41... second tire seal, 4
6...Second air passage.

Claims (1)

[Scope of utility model registration request] A main body column, a center cone which is provided at the center of the main body column so as to be movable up and down, and which centers the disk wheel, and a center cone which is provided on the outer periphery of the main body column so as to surround the center cone and which is concentric and movable up and down. , a first disc seal and a second disc seal that press the rim of the disc wheel, and a vertically installed disc seal on the main body column between the first disc seal and the second disc seal, and a sidewall of a tubeless tire. a first tire seal that presses the tire; a second tire seal that is provided on the outer periphery of the second disc seal so as to be movable up and down with respect to the second disc seal and that presses the sidewall of the tubeless tire; a first air passage provided between the disc seal and the first tire seal; a second air passage provided between the second disc seal and the second tire seal;
and a second air passage provided between the tire seal and the tubeless tire inflator.