JP5364113B2 - Punk repair kit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a difference between a pressure displayed by a manometer of a compressor device and an actual internal pressure of a tire. <P>SOLUTION: A compressor device 2 and a bottle unit 3 are directly connected. A cap 6 comprises a unidirectional valve 14 for preventing a reverse flow of a flat tire sealing agent to the side of the compressor device. A cylinder 12 of the compressor device 2 is provided with a pump chamber 11, and a surge chamber 18 which receives compressed air from the pump chamber 11 through an exhaust valve 16 where a volume Q2 of the surge chamber 18 is made to be 1.0 to 3.0 times of the stroke volume of a piston 10 in the pump chamber. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

The present invention relates to a tire puncture repair kit for repairing a puncture emergency by sequentially injecting a puncture sealing agent and compressed air into a punctured tire.
About.

  As a puncture repair kit that repairs puncture as soon as possible, the puncture sealant and compressed air are sequentially injected into the punctured tire and pumped up. For example, Patent Document 1 proposes a technique in which a cavity surface is covered over the entire circumference and a puncture hole is sealed immediately.

  As shown in FIG. 12, this type of repair kit includes a compressor device a that generates compressed air, and a bottle unit d in which a cap c is attached to the mouth of a bottle container b that contains a puncture sealing agent. The cap c has an air inlet c1 for sending compressed air into the bottle container, and a sealing agent / compressed air outlet for taking out the puncture sealing agent and compressed air from the bottle container b by feeding the compressed air. c2 is formed, the hose e1 from the compressor device a is connected to the air intake port c1, and the sealing agent / compressed air outlet port c2 is connected to the air valve Tv of the tire T at one end. The other end of the hose e2 to which the connectable fitting is attached is connected.

  In the case of this repair kit, since two hoses e1 and e2 are required, it is easy to make a mistaken piping, and the stability of the bottle unit d is poor. There is a problem that the sealing agent cannot be injected.

  Therefore, the present inventor has proposed that the air intake port c1 of the bottle unit d is configured to be directly connectable to the compressor device a. As a result, the bottle unit d and the compressor device a can be integrated and the center of gravity can be lowered, the stability can be increased and the overturn can be suppressed, and the hose e1 on the air intake side is not required, so that an erroneous piping Can eliminate the fear. FIG. 11A is a conceptual diagram showing a part of the internal structure at that time, in which the symbol f is a pump chamber for generating compressed air, g is its piston, h is a relief valve, and i is a pressure gauge. , J is a one-way valve that prevents the puncture sealing agent from the bottle container b from flowing back to the compressor device a side, and k is a flow path from the outlet f1 of the pump chamber f to the one-way valve j.

  However, when the bottle unit d and the compressor device a are directly connected, for example, as shown in FIG. 11B, the compressed pressure is displayed by the pressure gauge i of the compressor device a and filled with this compressed air. It has been found that there is a large deviation D between the tire T and the actual internal pressure Pt. That is, when the compressor device a is kept on and the punctured tire is pumped up to the relief pressure of the relief valve h, the actual tire internal pressure Pt is greater than the display pressure Pi of the pressure gauge i. For example, there is a problem that it becomes higher by about 100 kPa. At this time, since the tire is not pressurized beyond the capacity of the compressor device a, there is no safety problem, but the user may be distrusted or uneasy.

Therefore, the inventor studied the cause of the deviation D. As a result, the deviation D is
(A) pressure fluctuation of compressed air caused by reciprocating motion of the piston g;
(B) the one-way valve j that prevents the puncture sealing agent from the bottle container b from flowing back to the compressor device a; and (c) the volume reduction of the flow path k due to the direct connection;
Turned out to be the cause.

  That is, the pressure fluctuation of the compressed air in the flow path k increases due to the volume reduction of the flow path k. Of the pressure fluctuations that have increased due to the formation of the one-way valve j, high-pressure compressed air that is higher than the relief pressure passes through the one-way valve j and flows to the tire side. On the other hand, in the pressure gauge i, since the pressure is displayed by the compressed air on the low pressure side remaining in the pressure fluctuation, it is considered that the deviation D occurs. Therefore, in order to reduce the deviation D, it is necessary to suppress the pressure fluctuation range of the compressed air in the flow path k as small as possible. If the one-way valve j is not formed, such a divergence D does not occur. However, in the case of direct connection, the flow path k is short, so that the puncture sealing agent flows backward from the bottle container b and damages the compressor device a. Invite the fear.

JP 2000-108215 A

  Therefore, the present invention provides a cylinder with a surge chamber for storing compressed air from the pump chamber via an exhaust valve, and the volume of the surge chamber is 1.0 to 3.0 times the stroke volume of the piston in the pump chamber. The purpose of the present invention is to provide a puncture repair kit that can reduce the pressure fluctuation range of compressed air and reduce the difference between the display pressure of the pressure gauge of the compressor device and the actual tire internal pressure. Yes.

In order to solve the above problems, the invention of claim 1 of the present application is a compressor device having a compressed air discharge port for discharging compressed air, and a bottle having a cap attached to the mouth of a bottle container containing a puncture sealing agent. A puncture repair kit with units,
The cap can be directly connected to the compressed air discharge port portion, and an air intake port portion for sending the compressed air from the compressed air discharge port portion into the bottle container through the first flow path, and feeding of the compressed air And a sealing agent / compressed air outlet for sequentially taking out the puncture sealing agent and compressed air from the bottle container through the second flow path,
In addition, a one-way valve for preventing the puncture sealing agent from flowing back to the compressor device side is disposed in the first flow path,
The compressor device includes a cylinder having a pump chamber that compresses air by a reciprocating motion of a piston, and a surge chamber that receives compressed air from the pump chamber via an exhaust valve,
Moreover, a discharge port for sending compressed air from the surge chamber to the compressed air discharge port, a pressure gauge connection port connected to a pressure gauge for measuring the pressure of the compressed air, and a relief valve for releasing overpressure While opening the relief valve connection port to be connected,
The volume Q2 of the surge chamber is 1.0 to 3.0 times the stroke volume of the piston in the pump chamber.

According to a second aspect of the present invention, the cylinder includes a first cylinder part that forms the pump chamber, and a second cylinder that is adjacent to the first cylinder part via a partition wall and forms a surge chamber. A cylinder body provided with a series of parts, and a cylinder cap that closes the other end of the second cylindrical part,
The surge chamber includes a first projecting cylinder portion projecting from the partition wall into the surge chamber, and a first projecting cylinder portion projecting from the cylinder cap into the surge chamber and being extrapolated with a gap at a tip portion of the first projecting cylinder portion. The two protruding cylinder parts are divided into a sub surge chamber part surrounded by the first and second protruding cylinder parts and a remaining main surge chamber part, and the exhaust valve is provided in the auxiliary surge chamber part. It is characterized by having formed.

  According to a third aspect of the present invention, the exhaust valve is concentric with the first projecting cylinder and is opened and retracted by being guided by the first projecting cylinder and the valve port formed in the partition wall. A valve seat that can open and close the valve port and a biasing spring that biases the valve seat toward the valve port side are provided.

  As described above, according to the present invention, the cylinder is provided with a surge chamber for receiving and storing the compressed air from the pump chamber for compressing the air by the reciprocating motion of the piston through the exhaust valve, and the volume of the surge chamber is defined as the pump chamber. Is set to a large capacity of 1.0 to 3.0 times the stroke volume of the piston. Thereby, the pressure fluctuation range of the compressed air in the surge chamber can be kept small, and the difference between the display pressure of the pressure gauge of the compressor device and the actual internal pressure of the tire can be reduced.

It is a perspective view which shows the case where puncture repair is performed using the puncture repair kit of this invention. It is sectional drawing which shows a bottle unit. It is a fragmentary sectional view which shows the state before the connection of a bottle unit and a compressor apparatus. It is sectional drawing which decomposes | disassembles and shows the internal structure of a cap. (A), (B) is the side view and perspective view which show a valve seat case. It is a top view which shows the internal structure of a compressor apparatus. It is a disassembled perspective view which shows a compressor main body. It is a fragmentary sectional view which shows the principal part of a compressor main body. It is a disassembled perspective view which decomposes | disassembles and shows a cylinder. It is a graph which shows the change of the gap of the display pressure of a pressure gauge, and the actual tire internal pressure when changing the volume of a surge chamber. (A) is a conceptual diagram showing a part of the internal structure of a repair kit in which a bottle unit and a compressor device are directly connected, and (B) is a graph of display pressure Pi and tire internal pressure Pt showing problems at that time. It is a perspective view explaining the conventional puncture repair kit.

Hereinafter, embodiments of the present invention will be described in detail.
As shown in FIG. 1, a puncture repair kit 1 according to this embodiment includes a compressor device 2 and a bottle unit 3, and the bottle unit 3 includes a bottle container 4 containing a puncture sealing agent, and a mouth portion thereof. 5 (shown in FIG. 3). The compressor device 2 and the bottle unit 3 are directly connected at the puncture repair site without interposing hoses, and one end of the sealing agent / compressed air outlet 7 provided in the bottle unit 3 is a tire. The other end of the feed hose 29 connected to the T air valve Tv is connected. This storage hose 29 is wound around the cap 6 in a state of being connected to the sealing agent / compressed air outlet 7 when stored.

  As shown in FIG. 2, the bottle container 4 protrudes from the lower end of the body portion 30 with a small-diameter cylindrical mouth portion 5 through which a puncture sealing agent can be taken in and out.

  Further, the cap 6 can be directly connected to the compressed air discharge port portion 8 and the air intake port portion 27 for sending the compressed air from the compressed air discharge port portion 8 into the bottle container 4, and the compressed air is fed to the cap 6. A sealing agent / compressed air outlet 7 is provided for sequentially taking out the puncture sealing agent and compressed air from the bottle container 4.

  Specifically, the cap 6 is a cap body that integrally includes a bottom plate portion 31 forming a bottom surface, a bottle mounting portion 32 to which the mouth portion 5 of the bottle container 4 is attached, and a constricted portion 33 disposed therebetween. 6A. In the cap body 6A, the first flow path 35 extending from the air intake port 27 into the mouth portion 5 of the bottle container 4 and the sealing agent / compressed air outlet port portion 7 A second flow path 36 extending into the mouth portion 5 is formed.

  The bottle attachment portion 32 has an attachment concave portion 32A for fixing the mouth portion 5 and a boss portion 32B protruding from the bottom surface of the attachment concave portion 32A. The mounting recess 32A can be screwed into the mouth portion 5 by an internal screw provided on the inner wall surface thereof. On the upper surface of the boss portion 32B, a first flow path opening 37 that forms the upper end of the first flow path 35 and a second flow path opening 38 that forms the upper end of the second flow path 36 are provided. Each is open.

  The first flow path 35 is provided with a one-way valve 14 that prevents the puncture sealing agent from flowing back to the compressor side.

  The first flow path 35 includes a vertical flow path portion 35A extending downward from the first flow path upper opening 37, a horizontal flow path portion 35B extending laterally from the air intake port portion 27, and an L-shape that connects between them. And the joint flow path portion 35C. As shown in FIG. 4, the cap 6 is formed with a stepped vertical hole 50 having an inner diameter that gradually increases downward from the first flow path upper opening 37. The vertical hole 50 includes a first vertical hole 50A extending downward from the first flow path upper opening 37, and a second vertical hole connected to the first vertical hole 50A via the first step surface S1. A hole 50B, a third vertical hole 50C connected to the second vertical hole 50B via a second step surface S2, and a third step surface S3 to the third vertical hole 50C. And a fourth vertical hole portion 50D provided with a locking groove 51 extending in the circumferential direction on the lower end side while the lower end opens at the bottom surface of the cap body 6A.

  The vertical flow path portion 35A is formed by the first to third vertical hole portions 50A to 50C. A valve seat case 52 is inserted and held from the lower end of the fourth vertical hole portion 50D in the fourth vertical hole portion 50D.

  The valve seat case 52 has a columnar base 53 inserted into the fourth vertical hole portion 50D, and a valve seat mounting recess 53a for mounting the valve seat 63 is provided at the upper end of the base 53. Is done. Further, on the lower end side of the base portion 53, retaining means 54 that engages with the locking groove 51 and retains from the fourth vertical hole portion 50D is provided. The valve seat 63 is a ring-shaped body having a valve hole 63H. In this example, the valve seat 63 is made of a hard rubber elastic body, and is sandwiched and held between the third step surface S3 and the bottom surface of the valve seat mounting recess 53a.

  The base 53 is formed with the joint channel portion 35C. The joint channel portion 35C is opened at the bottom surface of the valve seat mounting recess 53a and is bent at the lower end of the longitudinal joint channel portion 35Ca that communicates with the longitudinal channel portion 35A through the valve hole 63H. It comprises a horizontal joint channel portion 35Cb that opens on the outer peripheral surface of the base 53 and is electrically connected to the lateral channel portion 35B. Further, there are O-rings around the base portion 53 for sealing between the base portion 53 and the fourth vertical hole portion 50D at positions above and below the opening of the horizontal joint channel portion 35Cb. O-ring attachment grooves 53b and 53b having a semicircular arc cross section for attaching 55 are formed. Thereby, the horizontal flow path part 35B and the joint flow path part 35C are closely connected.

  Further, as shown in FIG. 5, the retaining means 54 includes a center hole 56 extending upward along the axis from the lower end of the base 53, and an annular peripheral wall formed around the center hole 56. A plurality of small slits 57 that can divide the portion 53c into a plurality of circumferential fan-shaped pieces 53c1, and a circumferential direction that can project from the outer peripheral surface of each of the fan-shaped pieces 53c1 and engage with the locking groove 51 And a locking rib 58.

  The center hole portion 56 terminates below the joint channel portion 35C. The slit 57 extends radially upward from the lower end of the base 53, thereby dividing the peripheral wall 53c into a plurality of fan-shaped pieces 53c1 that can be elastically deformed inward and outward in the radial direction. Further, the retaining means 54 of this example includes a fitting shaft 59 that is fitted into the central hole portion 56. The insertion shaft 59 prevents the fan-shaped piece 53c1 from being elastically deformed inward in the radial direction, and prevents the engagement rib 58 from being disengaged from the engagement groove 51. Further, the valve seat case 52 is prevented from rotating by, for example, a lever-shaped protrusion 60 protruding from the outer peripheral surface of the base portion 53, and the opening of the lateral flow passage portion 35B when the valve seat case 52 is inserted into the vertical hole 50; Positioning with the opening of the horizontal joint channel portion 35Cb is performed.

  As shown in FIG. 4, the one-way valve 14 is a ball-shaped spherical valve 64 that is loosely inserted into the valve seat 63 and the third vertical hole portion 50C and can open and close the valve hole 63H of the valve seat 63. And a biasing spring 65 disposed in the second vertical hole portion 50B and biasing the spherical valve 64 toward the valve seat 63.

  Next, as shown in FIG. 2, the air intake port portion 27 is a connection nozzle 41 that projects from the constricted portion 33 toward the compressed air discharge port portion 8. Direct connection is established by fitting into the fitting recess 28 which is the compressed air discharge port 8.

  As shown in FIG. 3, the connection nozzle 41 includes a tapered cone-shaped tapered surface portion 41B on the distal end side of a nozzle body 41A having a constant outer diameter, and a fitting recess 28 on the outer periphery of the nozzle body 41A. An O-ring 43 that seals between the inner peripheral surface of the first and second inner surfaces is mounted. By disposing the O-ring 43 that is a consumable item on the bottle unit 3 side, the compressor device 2 can be used repeatedly without maintenance.

  Further, in the puncture repair kit 1 of this example, during the puncture repair, fixing means for preventing the connection between the compressed air discharge port portion 8 and the air intake port portion 27 and preventing the puncture sealing agent from contaminating the surroundings. 34 is provided.

  The fixing means 34 includes a locking means 34A formed on the cap 6 and a retaining means 34B formed on the compressor device 2. In this example, the locking means 34A protrudes toward the compressor device 2 on both sides of the connection nozzle 41 (upper and lower sides in this example) and has a pair of locking claws provided with a right triangular hook portion at the tip. 45. Further, in this example, the retaining means 34B is provided at a position facing the locking claw 45 and has a claw engagement hole 46 that can be engaged with the locking claw 45 and can be prevented from coming off.

  Next, as shown in FIG. 6, the compressor device 2 stores at least a motor M and a compressor body 13 in a storage case 9.

  As shown in FIG. 1, the storage case 9 is a flat, substantially rectangular parallelepiped box having a small height, and is formed so as to be disassembled into upper and lower case portions. As the motor M, various commercially available DC motors that operate with a 12V DC power source of an automobile can be used. A power cord having a power plug 15 that can be connected to a car cigarette lighter socket at the tip is connected to the motor M via a power switch that is attached to the upper plate of the storage case 9. The power plug 15 is removably accommodated in a recess (not shown) provided in the lower plate portion.

  7 and 8, the compressor body 13 includes a piston 10 connected to the motor M via a crank mechanism 17, a pump chamber 11 for compressing air by reciprocating motion of the piston 10, A cylinder 12 having a surge chamber 18 for receiving compressed air from the pump chamber 11 via an exhaust valve 16 is provided. The piston 10 has an intake hole 19A extending through the piston 10 in the axial direction, and the intake hole 19A is closed from the pump chamber side with a spring property, such as rubber, synthetic resin, metal, etc. The intake valve 19 using the valve 19B such as an elastic body is formed.

  The cylinder 12 includes a first cylindrical portion 70A that forms the pump chamber 11, and a second cylindrical portion 70C that is adjacent to the first cylindrical portion 70A via a partition wall 70B and one end side forms the surge chamber 18. And a cylinder cap 71 that closes the other end of the second cylindrical portion 70C.

  The partition wall 70B is formed with a first projecting cylindrical portion 72 that projects from the partition wall 70B into the surge chamber 18. Further, the cylinder cap 71 is formed with a second projecting cylindrical portion 73 that projects from the cylinder cap 71 into the surge chamber 18 and is inserted with a gap G at the distal end portion of the first projecting cylindrical portion 72. Is done. Thus, the surge chamber 18 is divided into a sub surge chamber portion 18A surrounded by the first and second projecting cylindrical portions 72 and 73 and a remaining main surge chamber portion 18B. The auxiliary surge chamber portion 18A is electrically connected to the main surge chamber portion 18B through the gap G, and the exhaust valve 16 is formed in the auxiliary surge chamber portion 18A.

  The exhaust valve 16 is concentric with the first projecting cylinder portion 72 and is formed in the partition wall 70B. The exhaust port 16 is guided by the first projecting cylinder portion 72 so as to advance and retreat. And a coil spring-like urging spring 76 that urges the valve seat 75 toward the valve port side.

  The second cylinder portion 70C has a pressure gauge connection port connected to a discharge port 77 for sending compressed air from the surge chamber 18 to the compressed air discharge port portion 8 and a pressure gauge 22 for measuring the pressure of the compressed air. 78 and a relief valve connection port 79 connected to the relief valve 23 for releasing overpressure are opened. The pressure gauge 22 and the relief valve 23 are preferably used with known structures.

  In addition, a connecting cylinder part 25 extending from the second cylinder part 70 </ b> C through the storage case 9 is integrally connected to the discharge port 77, and the compressed air discharge port part 8 is fitted to the opening end side thereof. A recess 28 is formed. As shown in FIG. 3, the fitting recess 28 includes front and rear tapered surface portions 28 </ b> B and 28 </ b> C that form a tapered cone toward the second cylindrical portion 70 </ b> C before and after the parallel hole portion 28 </ b> A having a constant inner diameter. ing. The rear taper surface portion 28C has substantially the same inclination as the taper surface portion 41B at the tip of the connection nozzle 41, and contacts the taper surface portion 41B to position the connection nozzle 41 and the fitting recess 28 in a concentric and accurate position. Yes. The front tapered surface portion 28B functions as a guide when the connection nozzle 41 is inserted.

  Next, in the compressor device 2 according to the present embodiment, the actual pressure Pt of the pumped-up tire and the display pressure Pi of the pressure gauge 22 due to the pressure fluctuation of the compressed air generated by the reciprocating motion of the piston 10. In order to prevent a large pressure difference (deviation D) from occurring between them, the volume Q2 of the surge chamber 18 is 1.0 to 3.0 times the stroke volume Q1 of the piston 10 in the pump chamber 11, which is conventionally known. Compared to The stroke volume Q1 means the volume difference of the pump chamber 11 from the state where the piston 10 is most retracted to the state where the piston 10 is most advanced.

  Here, the volume Q2 of the surge chamber 18 is indicated as the sum of the volume Q2B of the main surge chamber portion 18B and the volume Q2A of the auxiliary surge chamber portion 18A. The volume Q2A of the auxiliary surge chamber 18A means a value obtained by subtracting the volume of the exhaust valve 16 from the volume when the exhaust valve 16 is not provided. When the volume Q2 of the surge chamber 18 is less than 1.0 times the stroke volume Q1, the pressure fluctuation of the compressed air in the surge chamber 18 is not sufficiently relaxed, and the display pressure Pi of the pressure gauge 22 and the actual tire internal pressure. It becomes impossible to sufficiently reduce the deviation D from Pt. Further, even if the volume Q2 of the surge chamber 18 exceeds 3.0 times the stroke volume Q1, the effect of reducing the deviation D reaches its peak, and no further effect can be expected, and the volume Q2 becomes large. This causes an increase in disadvantages such as an increase in cost and an increase in size of the cylinder 12.

  In the compressor device 2 of the present example, the surge chamber 18 is divided into a main surge chamber portion 18B and a sub surge chamber portion 18A, and these are conducted through a gap G. Therefore, compression in the main surge chamber portion 18B is performed. Air pressure fluctuations can be further suppressed, and the deviation D can be reduced. The gap G is preferably in the range of 0.5 to 2.0 mm.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

  In order to confirm the effect of the present invention, a puncture repair kit using the bottle unit having the structure shown in FIG. 2 and the compressor device shown in FIG. 6 was prototyped according to the specifications shown in Table 1, and the compressor device was left switched on. The punctured tire was pumped up to the relief pressure (350 kPa) of the relief valve. Then, 20 minutes after the relief valve was activated, the pressure difference Pt−Pi between the actual tire internal pressure Pt and the display pressure Pi indicated by the pressure gauge was compared. The results are shown in Table 1 and FIG.

  The comparative example and the example have substantially the same specifications except for the volume of the surge chamber. The volume of the passage from the discharge port 77 of the cylinder 12 to the one valve 14 of the cap 6 is 1.0 cc.

  As shown in the table, it can be confirmed that the embodiment can reduce the difference between the display pressure of the pressure gauge of the compressor device and the actual tire internal pressure by increasing the volume of the surge chamber.

DESCRIPTION OF SYMBOLS 1 Puncture repair kit 2 Compressor apparatus 3 Bottle unit 4 Bottle container 5 Mouth part 6 Cap 7 Sealing agent and compressed air take-out part 8 Compressed air discharge part 10 Piston 11 Pump chamber 12 Cylinder 14 One-way valve 16 Exhaust valve 18 Surge chamber 22 Pressure gauge 23 Relief valve 27 Air intake port 35 First flow path 36 Second flow path 77 Discharge port 78 Pressure gauge connection port 79 Relief valve connection port 70A First cylinder part 70B Partition wall 70C Second cylinder part 70 Cylinder body 71 Cylinder cap 72 First projecting cylinder part 73 Second projecting cylinder part 18A Sub surge chamber part 18B Main surge chamber part 74 Valve port 75 Valve seat 76 Energizing spring

Claims (3)

A puncture repair kit comprising a compressor device having a compressed air discharge port for discharging compressed air, and a bottle unit having a cap attached to the mouth of a bottle container containing a puncture sealing agent,
The cap can be directly connected to the compressed air discharge port portion, and an air intake port portion for sending the compressed air from the compressed air discharge port portion into the bottle container through the first flow path, and feeding of the compressed air And a sealing agent / compressed air outlet for sequentially taking out the puncture sealing agent and compressed air from the bottle container through the second flow path,
In addition, a one-way valve for preventing the puncture sealing agent from flowing back to the compressor device side is disposed in the first flow path,
The compressor device includes a cylinder having a pump chamber that compresses air by a reciprocating motion of a piston, and a surge chamber that receives compressed air from the pump chamber via an exhaust valve,
Moreover, a discharge port for sending compressed air from the surge chamber to the compressed air discharge port, a pressure gauge connection port connected to a pressure gauge for measuring the pressure of the compressed air, and a relief valve for releasing overpressure While opening the relief valve connection port to be connected,
A puncture repair kit characterized in that the volume Q2 of the surge chamber is 1.0 to 3.0 times the stroke volume of the piston in the pump chamber. The cylinder includes a first cylinder part that forms the pump chamber and a second cylinder part that is adjacent to the first cylinder part via a partition wall and has a second chamber part that forms a surge chamber. A cylinder cap for closing the other end of the main body and the second cylindrical portion;
The surge chamber includes a first projecting cylinder portion projecting from the partition wall into the surge chamber, and a first projecting cylinder portion projecting from the cylinder cap into the surge chamber and being extrapolated with a gap at a tip portion of the first projecting cylinder portion. The two protruding cylinder parts are divided into a sub surge chamber part surrounded by the first and second protruding cylinder parts and a remaining main surge chamber part, and the exhaust valve is provided in the auxiliary surge chamber part. The puncture repair kit according to claim 1, wherein the puncture repair kit is formed.   The exhaust valve includes a valve port concentric with the first projecting cylinder part and formed in the partition wall, and a valve seat capable of opening and closing the valve port by being advanced and retracted while being guided by the first projecting cylinder part. A puncture repair kit according to claim 2, further comprising an urging spring for urging the valve seat toward the valve opening.

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