JP4338579B2 - Sealant unit for tire puncture emergency repair equipment - Google Patents

Description

  The present invention relates to a sealing agent unit for use in a tire puncture emergency repairing apparatus for repairing punctures by injecting a puncture sealing agent and high-pressure air sequentially into a punctured tire.

  As a tire puncture emergency repair device, a puncture sealant and high-pressure air are sequentially injected into a punctured tire and pumped up, and then the tire is run in this state. Japanese Patent Application Laid-Open No. H10-228561 proposes a cover that covers the surface and seals the puncture hole immediately.

JP 2000-108215 A

  In this apparatus, as shown in FIG. 6 (A), a container b containing a puncture sealing agent a, a compressor c as a high-pressure air source, and a unit u for removing the sealing agent attached to the container b are used. Is done. Then, the high pressure air from the compressor c is sent into the container b from the air flow path u1 provided in the unit u, whereby the puncture sealing agent a is taken out from the container b and sent to the tire t through the sealing agent flow path u2. The tires are pumped up by supplying high-pressure air subsequently.

  However, in this apparatus, as shown in FIG. 6 (B), when not in use, the container b is stored in the vehicle with its opening b1 sealed with a sealing film b2 that is easy to break, When generated, the unit u is attached to the container b by the operator. Therefore, the number of man-hours for assembling the apparatus at the puncture repair site increases, and the handling property tends to be inferior. In the middle of the mounting of the unit u, for example, the projecting portion u3 provided in the unit u breaks the seal film b2, thereby achieving electrical connection between the flow paths u1 and u2 and the inside of the container b. At the time of passing, the unit u and the container b are not yet tightly connected. Therefore, when an operator is unfamiliar, the puncture sealant a may spill out during installation work, and the hands and surroundings may be soiled. Further, there is a risk that the puncture sealing agent a flows out from the flow paths u1 and u2 that are conducted after the unit u is installed and before the piping to the compressor c and the tire t is completed.

  Therefore, the present inventor has proposed to adopt the following structure. That is, as schematically shown in FIG. 5, a unit u in which the flow paths u1 and u2 are closed with a cap e at the time of sale or the like is attached to the container b and stored in this state. In repairing puncture, piping is applied to the unit u in this state, and the compressor c is operated. At this time, the cap e is configured to be automatically released by the pressure increase of the air flow path u1 by high-pressure air, and the flow paths u1 and u2 are opened to be electrically connected to the container b.

  However, in order to adopt such a structure, it is necessary for the cap e to be easily removed by the air pressure of the compressor c. However, if the fitting force is too weak, the sealing performance is reduced, resulting in temperature rise or vibration during on-vehicle storage. As a result, the puncture sealing agent a leaks from the fitting portion between the cap e and the unit u and solidifies, and conversely, the cap e cannot be removed. Further, when piping with the tire t, it is also important from the viewpoint of safety to prevent the cap e from coming off due to the residual pressure in the tire and preventing the puncture sealing agent a from flowing back to the compressor c. New problems also arise.

  Therefore, according to the present invention, the use of the cap can eliminate the operation of attaching the unit and the container at the puncture repair site, improve the handleability, and easily and surely remove the cap by the high-pressure air from the compressor. On the other hand, it aims at providing the sealing agent unit used for the tire puncture emergency repair apparatus which can prevent the detachment | leave of the cap by the residual pressure in a tire.

In order to achieve the above object, the invention of claim 1 of the present application attaches a sealant container containing a puncture sealant, and supplies an air flow path for feeding high-pressure air from a compressor to the sealant container, and feeding high-pressure air A unit body having a sealing agent flow path for feeding the puncture sealing agent taken out to the tire, and a cap for closing the air flow path and the sealing agent flow path,
Moreover, the unit main body is provided with a mounting recess for inserting and fixing a container neck for removing the sealing agent of the sealing agent container, and a cap mounting portion that rises from the bottom surface of the mounting recess and elastically fits the cap. Having a boss part,
And opening an air intake port at one end of the air channel and a sealant outlet port at one end of the sealing agent channel at a position inside the cap mounting portion of the boss portion, and the sealing agent outlet port The diameter ratio D / d between the inner diameter d of the outlet and the diameter D of the cap mounting portion is 2 or more,
In addition, the cap is characterized in that a plug body that closes the sealing agent outlet with a sealing effect is provided on a base portion that covers the boss portion within a cap mounting portion.

  Further, in the invention of claim 2, the cap is elastically fitted to the cap mounting portion with a strength to be removed from the cap mounting portion when the air pressure in the air flow path is in a range of 200 to 300 kPa. Moreover, it is characterized in that the pressure of the sealing agent flow path acting on the plug body does not deviate below 800 kPa.

  According to a third aspect of the present invention, the cap mounting portion has a diameter D of 10 to 40 mm and an outlet inner diameter d of the sealing agent outlet of 0.5 to 5.0 mm.

  According to a fourth aspect of the present invention, the cap mounting portion is formed on the outer peripheral surface of the boss portion, and the sealing agent passage rises at the center of the boss portion and the tip forms the sealing agent outlet. The air intake port includes a portion and opens outside the cylindrical portion.

  According to a fifth aspect of the present invention, the cap is made of a synthetic resin.

  Since the present invention is configured as described above, it is possible to eliminate the mounting work of the sealing agent unit and the sealing agent container at the puncture repair site, improve the handleability, and facilitate the cap by the high-pressure air from the compressor. In addition, the cap can be reliably removed while preventing the cap from coming off due to the residual pressure in the tire.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an example of the usage state of a sealing agent unit used in the tire puncture emergency repair device of the present invention, and FIG. 2 is an enlarged cross-sectional view showing a main part thereof.

  In FIG. 1, the sealant unit 1 includes a unit main body 3 to which a sealant container 2 can be attached, and a cap 6 that hermetically closes an air flow path 4 and a sealant flow path 5 provided in the unit main body 3. The sealant unit 1 is stored on-board with the sealant container 2 attached, and only the piping work between the compressor c and the tire t by the hose 7 is performed at the repair site during puncture repair.

  The sealing agent container 2 is a bottle-shaped pressure-resistant container containing the puncture sealing agent a, and an outlet 2A1 for taking out the sealing agent opens at the tip of the container neck 2A.

  Next, as shown in FIG. 2, the unit body 3 includes a columnar body 12 such as a columnar shape, and the mounting recess 10 for inserting and fixing the container neck 2 </ b> A to the columnar body 12, A boss portion 11 provided with a cap attachment portion 11A for elastically fitting the cap 6 is integrally formed.

  In this example, the columnar body 12 has a stepped column shape with one end side (upper end in the figure) having a large diameter, and the mounting recess 10 is provided in the end face on the large diameter side (upper end face in the figure). is doing. An inner screw for fixing the container neck 2A by screwing is formed on the inner wall of the mounting recess 10. Further, a packing material 21 is interposed between the bottom surface 10S of the mounting recess 10 and the container neck 2A, and the take-out port 2A1 is hermetically closed with a sealing effect.

  The boss portion 11 is, for example, a cylindrical protrusion rising from the bottom surface 10S, and in this example, the cap 6 is elastically fitted on the outer periphery thereof. Therefore, the cap mounting portion 11 </ b> A is formed by the outer peripheral surface of the boss portion 11. In order to make the fitting more reliable, in this example, the outer peripheral surface of the boss part 11 has a semicircular cross section and a groove-like or rib-like (groove-like in this example) locking part extending in the circumferential direction. 13 is provided.

The unit main body 3 has an air flow path 4 for sending high-pressure air from the compressor c to the sealing agent container 2 and a sealing agent flow for feeding the puncture sealing agent a taken out by the high-pressure air feed to the tire t. A path 5 is formed.
The sealant flow path 5 functions as an air flow path 8 for sending high-pressure air from the compressor c to the sealant container 2 to the tire t after the supply of the puncture sealant a.

  Here, the air inlet 4A at one end of the air passage 4 and the sealing agent outlet 5A at one end of the sealing agent passage 5 are both on the upper end surface of the boss portion 11 and inside the cap mounting portion 11A. In this example, the sealing agent outlet 5A is formed as a central opening at the tip of the cylindrical portion 14 rising at the center of the boss portion 11. The air intake 4A is provided on the outer side of the cylindrical part 14 and on the inner side of the cap attaching part 11A, and in this example, a case of forming a ring shape surrounding the cylindrical part 14 is illustrated. It may be a small hole such as a round hole in which the air flow path 4 is opened as it is.

  The air flow path 4 extends downward from the air intake 4A through the columnar body 12 and communicates with the connection port 4B of the hose connection 15 provided on the circumferential surface of the body 12A on the small diameter side. . The sealant flow path 5 extends downward from the sealant outlet 5A through the columnar body 12 and communicates with a connection port 5B of a hose connection 16 provided on a peripheral surface of the body 12A on the small diameter side. is doing. In addition, it is preferable that the hose connection parts 15 and 16 are terminated inside the peripheral surface of the large-diameter body part 12B in order to carry out in-vehicle storage in a compact manner.

  Next, the cap 6 is made of an elastically deformable synthetic resin material, and includes a bottomed base portion 17 having a U-shaped cross section that is elastically fitted to the cap mounting portion 11A. And when this base | substrate part 17 fits, the said air flow path 4 and the sealing agent flow path 5 can be closed by covering the said boss | hub part 11 inside 11 A of cap attachment parts. Further, the base portion 17 is formed with a protruding plug 19 that protrudes from the bottom surface 17S and closes the sealing agent outlet 5A with a sealing effect. In the present embodiment, an engaging portion 18 is provided on the inner periphery of the base portion 17 to engage with the locking portion 13 to ensure the fitting.

  Since the sealing agent unit 1 of the present embodiment is configured as described above, the cap 6 and the air flow path 4 and the sealing can be provided even when the vehicle is stored in the vehicle with the sealing agent unit 1 and the sealing agent container 2 attached in advance. Since the agent flow path 5 is closed, the puncture sealing agent a can be accommodated in the sealing agent container 2 without leaking. Therefore, it is not necessary to install the sealant container and the unit at the puncture repair site as in the prior art, and the site work can be simplified, and troubles of spilling and leaking of the puncture sealant a accompanying the installation work are eliminated. Is possible.

  Further, since the cap 6 is automatically detached with the operation of the compressor c when the puncture repair is started after the piping is completed, the operability is not deteriorated as in the conventional case. Sequential feeding to the tire t can be performed smoothly.

Here, when the internal pressure (air pressure) P1 of the air flow path 4 is increased by the high-pressure air from the compressor c, the lifting force F1 (shown in FIG. 3A) obtained by the following equation (1) acts on the cap 6. To do. Therefore, the cap 6 can be removed from the boss portion 11 by setting the fitting force of the cap 6 to be smaller than the lifting force F1.
F1 = P1 × π (D / 2) ² ---- (1)
π is the circumference, and D is the diameter of the cap attachment portion 11A.

  At this time, in the present embodiment, since the diameter D can be secured relatively large, the fitting force can also be set to a large value. Therefore, the sealing performance between the cap 6 and the boss portion 11 can be sufficiently enhanced, and the liquid leakage of the puncture sealing agent a due to temperature rise or vibration during on-vehicle storage can be prevented.

In the sealing agent unit 1, the cap 6 is provided with a plug 19 that closes the sealing agent outlet 5 </ b> A. Here, when the residual pressure P2 remains in the tire, the lifting force F2 (shown in FIG. 3B) acting on the cap 6 when piping with the tire t is expressed by the following equation (2). At least the inner diameter d of the sealing agent outlet 5A is smaller than the diameter D of the cap attachment portion 11A. Accordingly, at least the lifting force F2 can be suppressed to be lower than the lifting force F1, the cap 6 can be prevented from coming off due to the residual pressure P2, and the backflow of the puncture sealing agent a to the compressor c can be suppressed.
F2 = P2 × π (d / 2) ² ---- (2)

  In this embodiment, the ratio D / d between the diameter D and the inner diameter d is set to 2 or more in order to suppress the backflow more reliably. The upper limit of the ratio D / d is not particularly limited, but is preferably 30 or less from the viewpoint of designing the bottle diameter to about 30 to 50 mm. Here, the diameter D is defined as a circular diameter having the same area as the area surrounded by the cap attachment portion 11A when the cap attachment portion 11A is non-circular. That is, when the cap attachment portion 11A is a square with one side L, it is defined as D = L × √ (4 / π). Similarly, the inner diameter d is defined as a circular diameter having the same area as the opening area of the sealing agent outlet 5A when the sealing agent outlet 5A is non-circular.

  The cap 6 is elastically fitted to the cap mounting portion with a strength that removes from the cap mounting portion when the internal pressure P1 is in the range of 200 to 300 kPa. That is, the cap 6 is released at 300 kPa or less, but is released at less than 200 kPa. Preferably not. If it is removed at less than 200 kPa, the sealing performance with the boss portion 11 becomes insufficient, and the puncture sealing agent a may leak during on-vehicle storage. On the other hand, if it does not come off at 300 kPa or less, it will be disadvantageous in terms of cost, for example, it will be necessary to unnecessarily increase the pressure resistance of components such as the sealing agent container 2, the unit body 3, and the hose 7. Also, when piping to a tire used at a high internal pressure such as a heavy load tire, the pressure of the sealing agent flow path 5 acting on the plug body 19 in order to prevent the puncture sealing agent a from flowing back to the compressor c, that is, It is also preferable that the cap 6 is fitted with such a strength that the residual pressure P2 is not removed when the residual pressure P2 is less than 800 kPa.

  The diameter D of the cap mounting portion 11A is preferably 10 to 40 mm, and if it is less than 10 mm, the lifting force F1 cannot be secured sufficiently large. Therefore, the sealing performance with the boss portion 11 tends to be insufficient, such as the necessity of setting the fitting force of the cap 6 low. On the other hand, if it exceeds 40 mm, the unit main body 3 becomes large and wastes storage space.

  The inner diameter d of the sealant outlet 5A is preferably 0.5 to 5.0 mm. If the inner diameter d is less than 0.5 mm, the puncture sealant a is solidified at the sealant outlet 5A during feeding. As a result, the sealing agent flow path 5 may be clogged. On the other hand, if it exceeds 5.0 mm, the lifting force F2 generated by the residual pressure P2 becomes large and the cap 6 is easily detached, which may cause the backflow of the puncture sealing agent a. From such a viewpoint, the diameter D is more preferably 20 to 30 mm, and the inner diameter d is more preferably 1 to 3 mm.

  FIG. 4 shows another embodiment of the sealant unit 1. In FIG. 4, the boss portion 11 has a circumferential groove 20 on an upper end surface thereof, and a cap 6 is fitted on a groove wall surface 20 </ b> S outside the circumferential groove 20. That is, the outer groove wall surface 20S constitutes the cap attachment portion 11A. The air flow path 4 opens at the groove bottom of the circumferential groove 20.

  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.

  A sealant unit 1 having the structure shown in FIG. 1 is prototyped with specifications of a diameter D (= 30 mm), an inner diameter d (= 1 mm), and an internal pressure P1 (= 260 kPa) when the cap 6 is removed. In the attached state, it was stored in an oven at 80 ° C. for 3 months. And after the storage, the generation | occurrence | production state of the liquid leakage of the puncture sealing agent a between the cap 6 and the boss | hub part 11 was confirmed, but the liquid leakage did not generate | occur | produce. Further, this product was further vibrated for 4 hours under the conditions of an acceleration of 3 G and a frequency of 10 to 50 Hz using a vibrator, but no liquid leakage of the puncture sealant a occurred.

  When this was piped to the compressor c and the tire t via the hose 7, the cap 6 was removed at a compressor pressure of 260 kPa, and the puncture sealing agent a and high-pressure air were sequentially fed into the tire t. We were able to.

It is a diagram which shows an example of the use condition of the sealing agent unit of this invention. It is sectional drawing which expands and shows a sealing agent unit. (A), (B) is a diagram explaining the lifting force which acts on a cap. It is a diagram which shows the other example of a sealing agent unit. It is a diagram which shows the comparative example of a sealing agent unit. (A), (B) is a diagram which shows the problem of a prior art.

Explanation of symbols

2 Sealing agent container 2A Container neck 3 Unit body 4 Air flow path 4A Air intake port 5 Sealing agent flow path 5A Sealing agent outlet 6 Cap 10 Mounting recess 10S Bottom surface 11 Boss portion 11A Cap mounting portion 14 Tube portion 17 Base portion 19 Plug Body a puncture sealant c compressor t tire

Claims (5)

A sealing agent container that contains a puncture sealing agent, an air flow path for sending high-pressure air from a compressor into the sealing agent container, and a sealing agent that sends the puncture sealing agent taken out by feeding high-pressure air to a tire A unit body having a flow path, and a cap for closing the air flow path and the sealing agent flow path,
Moreover, the unit main body is provided with a mounting recess for inserting and fixing a container neck for removing the sealing agent of the sealing agent container, and a cap mounting portion that rises from the bottom surface of the mounting recess and elastically fits the cap. Having a boss part,
And opening an air intake port at one end of the air channel and a sealant outlet port at one end of the sealing agent channel at a position inside the cap mounting portion of the boss portion, and the sealing agent outlet port The diameter ratio D / d between the inner diameter d of the outlet and the diameter D of the cap mounting portion is 2 or more,
Moreover, the cap is used in a tire puncture emergency repair device, characterized in that the cap includes a plug body that closes the sealing agent outlet with a sealing effect on a base portion that covers the boss portion within a cap mounting portion. Sealant unit.   The cap is a sealing agent that is elastically fitted to the cap mounting portion with a strength that removes from the cap mounting portion when the air pressure in the air flow path is in the range of 200 to 300 kPa, and acts on the plug body. The sealant unit used for a tire puncture emergency repair device according to claim 1, wherein the pressure of the flow path does not deviate below 800 kPa.   3. The tire puncture emergency repair device according to claim 1, wherein a diameter D of the cap mounting portion is 10 to 40 mm, and an outlet inner diameter d of the sealing agent outlet is 0.5 to 5.0 mm. Sealant unit used.   The cap mounting portion is formed on an outer peripheral surface of the boss portion, and the sealing agent flow path includes a cylindrical portion that rises at the center of the boss portion and has a tip that forms the sealing agent outlet, and the air intake The sealant unit used for the tire puncture emergency repair device according to any one of claims 1 to 3, wherein the mouth is opened outside the cylindrical portion.   The sealant unit used in the tire puncture emergency repair device according to any one of claims 1 to 4, wherein the cap is made of a synthetic resin.

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