JP2005248808A - Pump up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump up device facilitating re-start under load. <P>SOLUTION: Since an air supply valve 20 opens slightly if an air compressor stops during a compression stroke, pressurized air in a compression chamber is discharged to atmospheric air side via a gap formed between the air supply valve 20 and an inner surface of a cylinder and pressure in the compression chamber 17 drops. Consequently, since pressure in the compression chamber 17 is not high at a time of re-start of an air compressor even if a piston 10 stops during a compression stroke, load of a drive motor decreases and the air compressor 34 can be surely re-started. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides, for example, a pump-up that injects a sealing agent for sealing a punctured pneumatic tire into the pneumatic tire and then supplies pressurized air into the pneumatic tire to increase the internal pressure of the pneumatic tire. Relates to the device.

  In recent years, when a pneumatic tire (hereinafter simply referred to as “tire”) is punctured, the tire is repaired with a sealing agent without replacing the tire and the wheel, and then the internal pressure is increased to a predetermined reference pressure (pumping). Tire sealing / pump-up devices (hereinafter simply referred to as “pump-up devices”) are widely used.

  As this type of pump-up device, for example, there is a device equipped with a sealing agent storage container and an air compressor (see Patent Document 1).

  The work procedure for repairing a punctured tire using a pump-up device is to first inject a sealing agent into the tire, and then actuate an air compressor to fill the tire with pressurized air and inflate the tire.

Immediately after this, the tire is preliminarily driven for a certain distance by the tire injected with the sealing agent, the sealing agent is uniformly diffused inside the tire, the puncture hole is sealed with the sealing agent, and then the tire is again defined by the air compressor. Pump up again to internal pressure.
JP 2000-309254 A

  However, in the conventional pump-up device, after supplying the sealing agent into the tire, when supplying pressurized air into the tire, the cylinder is used to repeatedly start and stop the pump-up device to adjust the air pressure. There was a case where it stopped without being filled with the high-pressure air inside.

  That is, as shown in FIG. 7A, when the piston 100 of the air compressor is in the process of rising, the inside of the cylinder 102 becomes high pressure. For example, as shown in FIG. 7B, the piston 100 near the top dead center. Is stopped, the air supply valve 104 and the exhaust valve 106 are closed in a state where the pressure in the cylinder 102 is further increased, and the motor of the air compressor does not rotate even if it is restarted. It cannot be compressed.

  In other words, if the air compressor stops as described above, the motor will not rotate even if the switch is turned on, and a large-capacity starting current will continue to flow through the motor, causing the pump-up device or vehicle electrical system to malfunction. There are concerns.

  An object of the present invention is to provide a pump-up device that can easily restart at the time of loading in consideration of the above fact.

  The pump-up device according to claim 1 is a gas supply unit that supplies gas, a gas compression unit that compresses gas supplied from the supply unit into a compression chamber, and a discharge that discharges the compressed gas. And an intake valve that is provided on the intake section side, prevents gas from moving from the compression chamber side to the supply side, and allows movement of gas from the supply side to the compression chamber side, and on the exhaust section side An exhaust valve that prevents gas movement from the exhaust side to the compression chamber side and allows gas movement from the compression chamber side to the exhaust side, and externally pressurizes the compressed gas in the compression chamber when the compression means is stopped. And a discharge means that enables discharge.

  Next, the operation of the pump-up device according to claim 1 will be described.

  When the gas compression means is driven, the gas supplied from the air supply unit into the compression chamber is compressed, and the compressed gas is exhausted through the exhaust unit.

  When supplying air, the supply valve allows the gas to move, and the exhaust valve prevents the gas from moving. On the other hand, at the time of compression, the supply valve prevents gas movement, and the exhaust valve allows gas movement.

  Here, in the conventional pump-up device, when the compression means stops in the middle of the compression, the pressure in the compression chamber is maintained in an increased state. However, in the pump-up device according to claim 1, When stopping in the middle of compression, the discharge means discharges the pressurized gas in the compression chamber to the outside, and can reduce the pressure in the compression chamber.

  Therefore, the resistance when the compression means is stopped and restarted in the middle of compression is reduced, and the compression means can be reliably started.

  According to a second aspect of the present invention, in the pump-up device according to the first aspect, the discharge means floats the valve body constituting the air supply valve from the valve seat when the driving of the compression means is stopped. It is said.

  Next, the operation of the pump-up device according to claim 2 will be described.

  In the pump-up device according to the second aspect, since the valve body floats from the valve seat when the driving of the compression means is stopped, the pressurized gas in the compression chamber is discharged from the gap between the valve body and the valve seat.

  According to a third aspect of the present invention, in the pump-up device according to the second aspect, the valve body is bent or curved.

  Next, the operation of the pump-up device according to claim 3 will be described.

  In the pump-up device according to the third aspect, a gap is formed between the valve seat and the valve body because the valve body is bent or curved.

  According to a fourth aspect of the present invention, in the pump-up device according to the second aspect of the present invention, the pump-up device includes a spacer that floats the valve body from the valve seat.

  Next, the operation of the pump-up device according to claim 4 will be described.

  In the pump-up device according to the fourth aspect, the valve body is floated from the valve seat by the spacer, and a gap is formed between the valve body and the valve seat.

  According to a fifth aspect of the present invention, in the pump-up device according to the first aspect, the discharge means is a hole formed in a valve body constituting an air supply valve.

  Next, the operation of the pump-up device according to claim 5 will be described.

  In the pump-up device according to the fifth aspect, the pressurized gas is discharged from the hole formed in the valve body.

  According to a sixth aspect of the present invention, in the pump-up device according to the first aspect, the discharge means is a communication path that connects the compression chamber side and the atmosphere side. Pump-up device.

  Next, the operation of the pump-up device according to claim 6 will be described.

  In the pump-up device according to the sixth aspect, the pressurized gas is discharged from the communication path.

  As described above, according to the pump-up device of the present invention, there is an excellent effect that the restart can be easily performed.

[First Embodiment]
Hereinafter, a tire sealing / pump-up device according to an embodiment of the present invention will be described.
(Configuration of sealing / pump-up device)
FIG. 1 shows a sealing / pump-up device (hereinafter simply referred to as “pump-up device”) according to an embodiment of the present invention.

  The pump-up device 30 repairs a tire with a sealing agent without replacing the tire and the wheel when a pneumatic tire (hereinafter simply referred to as “tire”) mounted on a vehicle such as an automobile punctures. The internal pressure is re-pressurized (pumped up) to a predetermined reference pressure.

  As shown in FIG. 1, the pump-up device 30 includes a box-shaped casing 32 as an outer shell, and an air compressor 34 is disposed in the casing 32 as a supply source of pressurized air. .

  In the casing 32, a liquid agent container 40 for accommodating the sealing agent 36 is disposed.

  The liquid agent container 40 contains a sealing agent in an amount (for example, 200 cc) or more specified for each type of tire to be repaired by the pump-up device 30.

  Here, the liquid container 40 is formed of a resin such as polyethylene or polypropylene.

  As the liquid container 40, a container having a pressure resistance considerably lower than a pressure (reference pressure) defined as an internal pressure of a general pneumatic tire can be used, and a container having a special airtight structure needs to be used. Nor.

  Further, the liquid container 40 is provided with an air receiving port 39 in a top plate portion which is a partition portion on the upper end side along the height direction (arrow H direction) and discharges the liquid agent in a bottom plate portion which is a partition portion on the lower end side. An outlet 38 is provided.

  In the pump-up device 30 according to the present embodiment, a reciprocating type is used as the air compressor 34.

  As shown in FIG. 2, the air compressor 34 includes a piston 10, a crank 12, a crankshaft 14, and a cylinder 16.

  An air suction port 42 and an air discharge port 44 are opened in the cylinder 16.

  When operating, the air compressor 34 sucks air from the outside through the air suction port 42, pressurizes the suction air at a predetermined compression ratio, and discharges the air through the air discharge port 44.

  The air compressor 34 has a compression capacity capable of compressing atmospheric air to about 0.5 MPa to 1.0 MPa.

  One end of a common pipe 46 made of a pressure hose, pipe, or the like is connected to the air discharge port 44, and an air switching valve 48 is connected to the other end of the common pipe 46.

  As the air switching valve 48, a three-way (three-port) electromagnetic valve having one intake port 49 and two discharge ports 50 and 51 is used.

  Here, a common pipe 46 is connected to the suction port 49 of the air switching valve 48, and one discharge port 50 has a first air pipe 54 made of a pipe material having sufficient pressure resistance such as a pressure hose and a metal pipe. One end is connected, and the other discharge port 51 is connected to one end of a second air pipe 56 made of a fluid hose or the like.

  The other end of the second air pipe 56 is connected to the air receiving port 39 of the liquid container 40.

  Accordingly, the discharge port 51 of the air switching valve 48 communicates with the air receiving port 39 of the liquid agent container 40 through the second air pipe 56.

  Further, one end of a liquid injection pipe 58 is connected to the liquid agent discharge port 38 of the liquid agent container 40 from a hose for low-pressure fluid or the like.

  As shown in FIG. 1, the pump-up device 30 is provided with a gas-liquid switching valve 60 having two suction ports 61 and 62 and one discharge port 63, similarly to the air switching valve 48. The other end of the liquid injection pipe 58 and the other end of the first air pipe 54 are connected to the two suction ports 61 and 62 in the gas-liquid switching valve 60, respectively.

  One end of a joint hose 66 is connected to the discharge port 63 of the gas-liquid switching valve 60.

  An adapter 68 that can be screwed to the tire valve 122 of the tire 120 is disposed at the other end of the joint hose 66. As the joint hose 66, one having a pressure resistance substantially equal to that of the common pipe 46 and the first air pipe 54 is used.

  Specifically, as the joint hose 66, it is preferable to use a pressure resistant hose reinforced by reinforcement of nylon or the like.

  In the first air pipe 54, a heater 70 is disposed between the air switching valve 48 and the gas / liquid switching valve 60 as heating means for pressurized air.

  As shown in FIG. 1, the heater 70 has a heating pot 72 having sufficient pressure resistance and heat resistance as an outer shell portion thereof, and the inside of the heating pot 72 is curved in a U shape. A pressurized air flow passage 74 is formed, and a heating resistor 76 extending along the inner surface of the flow passage 74 is disposed.

  Here, as the heating resistor 76, for example, a halogen heater that generates Joule heat when a voltage is applied, a ceramic heater that generates far infrared rays, or the like can be used.

  Further, in order to increase the contact area with the pressurized gas that passes through the flow passage 74, the heating resistor 76 is formed with fins that are formed into a plate shape, a protrusion shape, or the like so as to face the flow passage 74. It is preferable to keep it.

  The pump-up device 30 is provided with an operation panel 78 having a start / stop button 80 and a gas-liquid switching button 82 outside the casing 32.

  The operation panel 78 has a drive / control circuit 84 and a power cable (not shown). The power panel is driven from the vehicle by, for example, being inserted into a socket of a cigarette lighter installed in the vehicle. Power is supplied to the control circuit 84.

The drive / control circuit 84 controls a drive motor 35 of the air compressor 34, switching valves 48 and 60, and a heating resistor 76, which will be described later, according to operations on the start / stop button 80 and the gas-liquid switching button 82, respectively.
(Air Compressor)
As shown in FIG. 1, the air compressor 34 includes a drive motor 35 as a drive source, and the output shaft of the drive motor 35 is connected to the crankshaft 14 shown in FIG.

  As shown in FIG. 2, the intake valve 20 is attached to the air inlet 42, and the exhaust valve 22 is attached to the air outlet 44.

  As shown in FIG. 3, the intake valve 20 is formed of a thin plate material that can be elastically deformed. The intake valve 20 has a circular valve body 20A having a diameter larger than the diameter of the air suction port 42, and the valve body 20A. And a mounting portion 20B that protrudes from the valve body 20A.

  The mounting portion 20B is fixed to the inner surface of the cylinder by a fixing member 24 such as a screw or a rivet.

  The valve body 20A has a planar shape, and the valve body 20A and the mounting portion 20B are angled θ.

  For this reason, the valve body 20A is inclined with respect to the cylinder inner surface when the piston is stationary, and the side opposite to the mounting portion 20B is separated from the cylinder inner surface.

  As shown in FIG. 3A, the clearance amount (maximum value) α between the cylinder inner surface and the valve body 20A at the open end of the air suction port 42 may be set within a range of 0.05 to 1.5 mm. preferable.

  On the other hand, the exhaust valve 22 is also formed of a thin plate material that can be elastically deformed in the same manner as the air supply valve 20, and is fixed to the outer surface of the cylinder as shown in FIG.

  The exhaust valve 22 is in close contact with the outer surface of the cylinder when the air is supplied and when the piston is stationary (FIG. 2B), and completely blocks the air discharge port 44.

  Note that one end of an air suction pipe 110 is connected to the air suction port 42, and the other end of the air suction pipe 110 is open to the atmosphere.

  In the air compressor 34 configured as described above, when the crankshaft 14 is rotated by the drive motor 35, the piston 10 reciprocates up and down, and when the piston 10 descends, the exhaust valve 22 of the air discharge port 44 is closed. Then, the intake valve 20 of the air inlet 42 is opened and air is sucked into the compression chamber 17.

When the piston 10 rises, the pressure in the compression chamber 17 rises, the exhaust valve 22 opens, the intake valve 20 closes, and the pressurized air is exhausted to the outside through the air discharge port 44.
(Sealing agent)
Next, the sealing agent 36 used for the pump-up device 30 as described above will be described.

  The sealing agent 36 includes rubber latex such as SBR (styrene butadiene rubber) latex, NBR (acrylonitrile-butadiene rubber) latex, and rubber latex of a mixture of SBR latex and NBR latex, and an aqueous dispersion or an emulsion thereof. It has a resin adhesive added in the state.

  Further, the sealing agent 36 may be mixed with a fiber material or whisker made of polyester, polypropylene, glass or the like, or a filler (filler) made of calcium carbonate, carbon black or the like in order to improve the sealing performance against the puncture hole. In addition, silicate or polystyrene particles may be mixed in order to stabilize the sealing performance.

  In addition to the above-described components, anti-freezing agents such as glycol, ethylene-glycol, and propylene glycol, antifoaming agents, pH adjusters, and emulsifiers are generally added to the sealing agent 36.

(Operation of sealing / pump-up device)
Next, an operation procedure for repairing the punctured tire 120 using the pump-up device 30 according to the present embodiment will be described.

  When the tire 120 is punctured, the operator first screws the adapter 68 to the tire valve 122 of the tire 120 and connects the joint hose 66 to the punctured tire 120.

  At this time, the air compressor 34 is stopped, and the air switching valve 48 is in a position (pressurization position) where the suction port 49 communicates with the discharge port 51.

  On the other hand, the gas-liquid switching valve 60 is in a position where the discharge port 63 communicates with the suction port 61 and closes the liquid injection pipe 58, and the sealing agent 36 in the liquid container 40 passes through the liquid injection pipe 58 due to its own weight. Is prevented from leaking out.

  At this time, the gas-liquid switching valve 60 opens the first air pipe 54, but is closed by the air switching valve 48, so that the first air pipe 54 is pressurized by the air compressor 34. Air does not circulate.

  Next, the operator presses the start / stop button 80 on the operation panel 78 after inserting the power cable into the socket of the cigarette lighter of the vehicle.

  In conjunction with this, the drive / control circuit 84 operates the air compressor 34 to send pressurized air into the liquid agent container 40 through the common pipe 46 and the second air pipe 56.

  The drive / control circuit 84 applies a drive voltage to the heating resistor 76 in the heater 70 in conjunction with the pressing of the start / stop button 80, and generates heat before the pressurized air circulates in the heating pot 72. The resistor 76 is preheated.

  The drive / control circuit 84 switches the communication destination of the discharge port 63 in the gas-liquid switching valve 60 from the discharge port 62 to the discharge port 61 when a predetermined time has elapsed from the operation of the air compressor 34.

  As a result, the inside of the liquid agent container 40 communicates with the inside of the tire 120 through the liquid injection pipe 58 and the joint hose 66, and the sealing agent 36 is pushed out of the liquid agent container 40 by its own weight and the static pressure of the pressurized air. 36 is injected into the tire 120 through the injection pipe 58 and the joint hose 66.

  At this time, since the sealing agent 36 is pushed out of the liquid agent container 40 under the static pressure of the pressurized air, a prescribed amount of the sealing agent 36 can be obtained in a shorter time than when the sealing agent 36 is discharged from the liquid agent container 40 only by its own weight. Sealing agent 36 can be injected into tire 120.

  At this time, the static pressure in the air layer portion of the liquid agent container 40 is set in accordance with the viscosity of the sealing agent 36, and even if the static pressure is considerably lower than the reference pressure of the tire 120, the sealing agent 36 is removed from the liquid agent container 40 into the tire The time for injection into 120 can be effectively shortened.

  Specifically, the static air pressure in the liquid agent container 40 is set in the range of 0.05 MPa to 0.15 MPa according to the viscosity of the sealing agent 36, and the higher the viscosity of the sealing agent 36 in this range, the higher the pressure. Is set.

  When the sealing agent 36 is injected from the liquid container 40 into the tire 120, the drive / control circuit 84 controls the drive motor 35 of the air compressor 34 to the tire 120 so that the static air pressure in the liquid container 40 does not rapidly increase. It is preferable to perform control so as to rotate at a lower speed than when pumping up.

  The operator presses the gas-liquid switching button 82 on the operation panel 78 when the injection of a predetermined amount of the sealing agent 36 from the liquid agent container 40 into the tire 120 is completed.

  The completion of the injection of the predetermined amount of the sealing agent 36 may be determined by using the time from the start of injection as a parameter, and a transparent window portion is provided in the liquid agent container 40, and an operator can remove the sealing agent 36 through the window portion. The injection amount may be confirmed.

  In conjunction with the depression of the gas-liquid switching button 82, the drive / control circuit 84 switches the communication destination of the discharge port 63 of the gas-liquid switching valve 60 from the suction port 62 to the suction port 61, and in synchronization with this, the air switching valve 48 is switched. The communication port of the suction port 49 is switched from the discharge port 51 to the discharge port 50.

  Accordingly, the pressurized air supplied from the air compressor 34 is started to be supplied into the tire 120 through the first air pipe 54 and the joint hose 66, and the tire 120 is inflated by increasing the internal pressure of the tire 120.

  At this time, the pressurized air flowing through the first air pipe 54 is heated by the heater 70 to 40 ° C. to 100 ° C., preferably 60 ° C. to 80 ° C., and supplied into the tire 120. Is done.

  As a result, the curing time of the sealing agent 36 is hardly affected by the ambient environmental temperature, and the curing time of the sealing agent 36 injected into the tire 120 can be stabilized.

  As a result, for example, due to the influence of the ambient environmental temperature, the sealing agent 36 remains uncured even after completion of preliminary traveling described later, or the sealing agent 36 is cured in the tire 120 before preliminary traveling. Therefore, it is possible to effectively prevent failure or incomplete repair of the puncture hole.

  Thereafter, when the operator confirms that the internal pressure of the tire 120 has become the specified pressure by a pressure gauge (not shown) provided in the air compressor 34, the operator presses the start / stop button 80 again.

  In conjunction with this, the drive / control circuit 84 stops the air compressor 34.

  Next, the operator removes the adapter 68 from the tire valve 122 and disconnects the joint hose 66 from the tire 120.

  After completion of the expansion of the tire 120 at the specified pressure, the worker travels preliminarily for a certain distance using the tire 120 into which the sealing agent 36 has been injected before the sealing agent 36 is cured.

  As a result, the sealing agent 36 is uniformly diffused into the tire 120, and the sealing agent 36 is filled in the puncture hole to close the puncture hole.

  After completion of the preliminary travel, the operator again screws the adapter 68 of the joint hose 66 to the tire valve 122 and operates the air compressor 34 to pressurize the tire 120 to a specified internal pressure.

  As a result, when the puncture repair of the tire 120 is completed and the joint hose 66 is removed from the tire 120, normal traveling using the tire 120 becomes possible.

  When the air compressor 34 stops in the middle of the compression process, for example, as shown in FIG. 2 (B), the air supply valve 20 opens slightly as shown in FIG. 3 (A). Air is discharged to the atmosphere side through a gap formed between the air supply valve 20 and the cylinder inner surface, and the internal pressure of the compression chamber 17 decreases.

  For this reason, even when the piston 10 stops in the middle of the compression process, when the air compressor 34 is restarted, the internal pressure of the compression chamber 17 is not high, so the load on the drive motor 35 is reduced. The air compressor 34 can be reliably restarted.

  During compression, since pressurized air leaks to the atmosphere side through a gap between the cylinder inner surface and the valve body 20A, the amount of pressurized air discharged to the air discharge 44 side and the amount of leakage to the atmosphere side Needless to say, the clearance amount α is determined in consideration of the balance.

If the clearance amount α is too small, it takes too much time to reduce the internal pressure of the compression chamber. On the other hand, when the clearance amount α is too large, the discharge amount of the pressurized air to the discharge side is reduced.
[Second Embodiment]
Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same structure as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 4, the entire air supply valve 20 of the present embodiment is formed in a flat plate shape, and a gap is formed between the inner surface of the cylinder via a thin spacer 28.

  The clearance amount (maximum value) α between the cylinder inner surface and the valve body 20A is preferably set in the range of 0.05 to 1.5 mm.

Also in this embodiment, when the piston 10 stops in the middle of the compression process, the pressurized air in the compression chamber 17 is discharged to the atmosphere side through the gap between the air supply valve 20 and the cylinder inner surface, and the first As with the embodiment, the air compressor 34 can be reliably restarted.
[Third Embodiment]
Next, a third embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same structure as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 5, the air supply valve 20 of the present embodiment is entirely formed in a flat plate shape, and a small hole 21 is formed at the center of the valve body 20A. Note that the air supply valve 20 of this embodiment is in close contact with the cylinder inner surface except during air supply.

  In this embodiment, when the piston 10 stops in the middle of the compression process, the pressurized air in the compression chamber 17 is discharged to the atmosphere side through the small hole 88 formed in the air supply valve 20, and the first embodiment and Similarly, the air compressor 34 can be reliably restarted.

  In addition, since compressed air leaks to the atmosphere side through the small hole 88 at the time of compression, the small hole 88 is considered in consideration of the balance between the discharge amount of the pressurized air to the air discharge 44 side and the leak amount to the atmosphere side. Needless to say, the diameter of the material is determined.

In addition, as a diameter of the small hole 88, about 0.05-2.0 mm is preferable. If the diameter is too small, it takes too much time to reduce the internal pressure of the compression chamber. On the other hand, if the diameter is too large, the amount of pressurized air discharged to the discharge side will decrease.
[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected about the same structure as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 6, the air supply valve 20 of the present embodiment is formed in a flat plate shape as a whole, and is in close contact with the cylinder inner surface except during air supply.

  The cylinder 16 is formed with a slit 90 communicating with the air suction port 42, and the compression chamber 17 communicates with the atmosphere side through the slit 90.

  In the present embodiment, when the piston 10 stops in the middle of the compression process, the pressurized air in the compression chamber 17 is discharged to the atmosphere side through the slit 90, and the air compressor 34 is reliably secured as in the first embodiment. Can be restarted.

  In addition, since compressed air leaks to the atmosphere side through the slit 90 at the time of compression, the compression of the slit 90 is performed considering the balance between the discharge amount of the pressurized air to the air discharge 44 side and the leak amount to the atmosphere side. Needless to say, the opening area on the chamber side is determined.

Note that the opening area of the slit 90 is preferably about 0.002 to 3.5 mm ² . If the area is too small, it takes too much time to reduce the internal pressure of the compression chamber. On the other hand, if the area is too large, the amount of pressurized air discharged to the discharge side will be reduced.

  In the pump-up device 30 according to the above embodiment, the air compressor 34 is a reciprocating type, but other types such as a screw type, a vane type, and a root type can be used as the type of the air compressor 34. .

(Comparative test 1)
In order to confirm the effect of the present invention, the restartability under load and the air flow rate were compared using the pump-up device (air compressor) of the conventional example, the comparative example, and the example to which the present invention was applied. .

Air compressor specifications Piston diameter x Stroke: φ30mm x 16mm
Motor: RS-550VC7527 manufactured by Mabuchi Motor Co., Ltd.
Reducer gear ratio: 0.169
Air inlet diameter: φ4.2mm
Diameter of air discharge port: φ4.2mm

試験の結果、クリアランス量の大きすぎる比較例２では、エアー流量が大幅に低下してしまった。また、クリアランス量が小さすぎる比較例１では、従来例と同様に負荷時の再起動ができなかった。

As a result of the test, in Comparative Example 2 in which the clearance amount was too large, the air flow rate was greatly reduced. Further, in Comparative Example 1 in which the clearance amount is too small, restarting under load could not be performed as in the conventional example.

It is a block diagram which shows the structure of the pump-up apparatus and tire which concern on embodiment of this invention. (A) And (B) is sectional drawing of the principal part of an air compressor. (A) is sectional drawing of the air supply valve vicinity of an air compressor, and is a top view of the air supply valve vicinity. It is sectional drawing of the air supply valve vicinity of the air compressor which concerns on 2nd Embodiment. It is sectional drawing of the air supply valve vicinity of the air compressor which concerns on 3rd Embodiment. (A) is sectional drawing of the air supply valve vicinity of the air compressor which concerns on 4th Embodiment, (B) is a top view of the air supply valve vicinity. (A) And (B) is sectional drawing of the principal part of an air compressor.

Explanation of symbols

20 Intake valve 22 Exhaust valve 28 Spacer 30 Pump-up device 34 Air compressor 42 Air inlet 44 Air outlet 88 Small hole

Claims (6)

An air supply unit for supplying gas;
Gas compression means for compressing the gas supplied from the air supply section into the compression chamber;
A discharge part for discharging the compressed gas;
An air supply valve that is provided on the intake section side, prevents gas from moving from the compression chamber side to the air supply side, and allows gas movement from the air supply side to the air supply side;
An exhaust valve that is provided on the exhaust part side, prevents movement of gas from the exhaust side to the compression chamber side, and allows movement of gas from the compression chamber side to the exhaust side;
A discharge means for allowing the pressurized gas in the compression chamber to be discharged to the outside when driving of the compression means is stopped;
A pump-up device comprising:   2. The pump-up device according to claim 1, wherein the discharge unit floats a valve body constituting the air supply valve from the valve seat when driving of the compression unit is stopped.   The pump-up device according to claim 2, wherein the valve body is bent or curved.   The pump-up device according to claim 2, further comprising a spacer that floats the valve body from the valve seat.   The pump-up device according to claim 1, wherein the discharge means is a hole formed in a valve body constituting an air supply valve.   2. The pump-up device according to claim 1, wherein the discharge unit is a communication path that connects the compression chamber side and the atmosphere side.

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