JP4677010B2 - Sealing agent injection hose and automotive tire puncture repair device using the same - Google Patents

Description

The present invention relates to a sealing agent injection hose for use in a puncture repairing apparatus that urgently repairs a puncture by filling a punctured tire with a sealing agent, and a puncture repairing apparatus for an automobile tire using the same .

  As a puncture repair device for repairing a punctured tire as an emergency, for example, as shown in FIG. 9 (A), the tire b and the compressor c are connected to the sealing agent container a using hoses d1 and d2. By sending the compressed air from the compressor c into the sealing agent container a, the sealing agent in the sealing agent container a is pumped into the tire b, and then the tire b is automatically pumped up by the subsequently flowing compressed air. What is made to suggest is proposed (for example, refer patent document 1).

  The hose d2 used in such a puncture repair device is provided with a nut-shaped fitting f that can be screwed to the tire valve e at the front end thereof.

Japanese Patent Laid-Open No. 2001-212883

  However, in the case of the conventional connection fitting f, when the filling of the sealing agent and compressed air is completed and the connection fitting f is removed from the tire valve e, the sealing agent scatters from the gap between the connection fitting f and the tire valve e, There is a problem that it adheres to workers' hands and clothes. In addition, when using the puncture repair device, there is a risk that the compressor c will be operated before the connection fitting f is connected to the tire valve e. In this case, the sealing agent flows out from the tip of the connection fitting f. There is a problem that the surroundings are soiled.

  In particular, in recent years, a function for filling only the compressed air from the compressor c is added to the puncture repair device, and for example, a non-punctured tire whose air pressure has been lowered is increased to a standard internal pressure, or for example, a rubber boat or a floating bag is inflated. For this purpose, for example, as shown in FIG. 9B, a changeover switch g is interposed between the compressor c and the sealing agent container a. A configuration in which a hose d3 dedicated to filling compressed air is connected to a port P2 of the changeover switch g has been proposed. However, in such a general-purpose type puncture repair device, since there are two hoses d2 dedicated to puncture repair and a hose d3 dedicated to filling compressed air, there is a risk of erroneous connection to the tire valve e. When the hose d3 dedicated to compressed air filling is accidentally connected to the tire valve e at the time of puncture repair, the sealing agent flows out from the hose d2 dedicated to puncture repair, and the surroundings are newly contaminated.

  Therefore, the present invention prevents the sealant that scatters when removing the connection fitting from the tire valve from adhering to the operator, and forgets to connect the hose to the tire valve, misconnects, or from the hose when the compressor is mistakenly operated. An object of the present invention is to provide an injection hose for a sealing agent that can prevent the sealant from flowing out and suppress contamination to the surroundings.

In order to achieve the above object, the invention of claim 1 of the present application includes a hose body whose rear end portion is connected to a sealing agent container containing a sealing agent for sealing a punctured tire, and a hose body attached to the front end portion of the hose body. And a connection fitting that can be connected to a tire valve of a punctured tire, the connection fitting comprising a connection fitting body provided at a front end with a connection screw portion that can be screwed to a valve stem of the tire valve, and the connection screw. A closing cap that is detachably disposed on the connecting portion and that allows the connecting screw portion to be screwed onto the valve stem by being removed, and a cylindrical outer sleeve that is fixed to the outer periphery of the connecting fitting main body. the sleeve has a projecting portion projecting forward from the front end of the connection fitting body, yet the fitting body comprises a small diameter portion on the front side, It is characterized by a gap between the small-diameter portion the inner circumferential surface of the outer sleeve.

  According to a second aspect of the present invention, the closing cap is formed with a core pushing projection at the front end of the closing cap that can exhaust air in the tire from the tire valve by pushing the tip of the valve core of the tire valve. Yes.

  According to a third aspect of the present invention, the projecting portion of the outer sleeve has an amount of projecting from the front end of the connection fitting body of 1 to 5 mm.

According to a fourth aspect of the present invention, the outer sleeve is provided with a knurled portion comprising a plurality of grooves extending in the axial direction on the outer peripheral surface thereof. Further, in the invention of claim 5, the retract and case, a compressor for generating compressed air, blowout of automobile tires compressed air is accommodated a sealing agent container containing the supplied and sealing agent from the compressor A repair device, wherein a rear end portion of the injection hose according to any one of claims 1 to 4 is connected to a sealing agent / compressed air outlet of the sealing agent container.

  As described above, according to the present invention, the connection fitting is provided with a connection fitting main body provided with a connection screw portion that can be screwed to the tire valve at the front end portion, a closing cap that is detachably disposed on the connection screw portion, and the connection fitting. The outer sleeve is fixed to the outer periphery of the main body.

  The connection fitting can be connected to the tire valve by removing the closing cap from the connection fitting main body. Conversely, until the connection fitting main body is connected to the tire valve, the closing cap is connected to the connection fitting main body. It is attached to the main body. Therefore, even if you forget to connect the hose to the tire valve, make an incorrect connection, or misoperate the compressor, the sealing cap can prevent the sealing agent from flowing out from the front end of the fitting, and the surrounding contamination can be suppressed. sell.

  The outer sleeve has a projecting portion that projects forward from the front end of the connection fitting main body. This overhanging part functions as a shielding plate, and when the sealing agent scatters from the gap between the connection fitting body and the tire valve when the connection fitting body is removed from the tire valve after filling with the sealing agent and compressed air, The overhanging portion can prevent the sealing agent from scattering to the rear side, and can prevent the sealing agent from adhering to the operator.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram conceptually showing a general-purpose puncture repair device using the injection hose of the present invention, FIG. 2 is a perspective view of the puncture repair device, and FIG. 3 is a perspective view showing the inside thereof.

  As conceptually shown in FIG. 1, the puncture repair device 1 of this embodiment includes a storage case 2, a compressor 3 that generates compressed air, a sealing agent container 6 that contains a sealing agent, the compressor 3 and a sealing agent container. 6 and a changeover switch 8 interposed between the air intake port portions 7 are accommodated. Further, in the puncture repair device 1, the rear end portion of the injection hose 24 dedicated to puncture repair is connected in advance to the sealant / compressed air outlet port 28 of the sealant container 6 and to the port P2 of the changeover switch 8. Are connected in advance to the rear end of the hose 23 dedicated to compressed air filling.

  As shown in FIGS. 2 and 3, the storage case 2 has a vertical flat rectangular box shape in which the front and rear of the peripheral frame 2a are closed by a front plate 2b and a rear plate (not shown). The main case 10 is formed by opening one side of the bottom in the width direction (right side in the figure), and the bottom case 12 that is detachably attached to the opening 10A of the main case 10 and closes the opening. The bottom case 12 is guided to be slidable in the width direction by, for example, a guide groove (not shown), and is easily fixed to the main case 10 by a hook 17 (shown in FIG. 3) in the closed state. . The inside of the main case 10 is divided into a first accommodation space 15A that leads to the opening 10A and a second accommodation space 15B adjacent to the first accommodation space 15A by a partition wall 14 that extends vertically.

  Next, as the compressor 3, various commercially available small-sized compressors that are driven by using an automobile battery as a power source can be used. Since the compressor 3 is heavy, the stability of the puncture repair device 1 is enhanced by attaching the compressor 3 below the second accommodation space 15B and lowering the center of gravity. Above the compressor 3, a pressure gauge 18 for measuring the pressure of the compressed air generated by the compressor 3 and a power switch 19 of the compressor 3 are mounted side by side so as to be visible or operable from the front side. As shown in FIG. 3, the power switch 19 and the pressure gauge 18 and the compressor 3 are partitioned by a partition plate 20 and opened by a notch window 22 provided on the side surface of the main case 10. A storage space 21 is formed. Such an arrangement is useful for ensuring a wide display portion J (shown in FIG. 2) for explaining handling on the front surface of the storage case 2. In the storage space 21, a power cord (not shown) that extends from the power switch 19 and can be connected to a cigarette lighter socket of an automobile, and the compressed air filling hose 23 are removably stored.

  Next, the sealing agent container 6 includes a container body 4 and a lid body 5 attached to the mouth portion 4A. The sealing agent container 6 is accommodated in the first accommodation space 15A in an inverted state in which the lid body 5 is directed downward. Is done. The sealant container 6 can be put in and out from the opening 10A into the first storage space 15A.

  As shown in FIG. 4, the container body 4 is preferably a bottle-shaped pressure-resistant container having a pressure resistance of 1 MPa or more, and the opening 4A is opened at the tip of the neck 4B.

  The lid body 5 has a cylindrical body portion 26, for example, and the cylindrical body portion 26 has a nipple-shaped air intake port portion 7 for sending compressed air from the compressor 3 into the container body 4, and A nipple-like sealing agent / compressed air outlet port 28 for sequentially feeding out the puncture sealing agent and compressed air from the container body 4 by the compressed air feeding is provided. The air intake port 7 and the sealing agent / compressed air outlet port 28 are electrically connected to the inside of the container body 4 through first and second flow paths 29 and 30 that pass through the body 26, respectively. ing. Reference numeral 25 in the figure denotes an inner lid (indicated by a one-dot chain line) fitted to the boss portion 27 of the body portion 26, and the inside of the container body 4 of the first and second flow paths 29, 30. Cover the opening. Thereby, it is possible to prevent the sealing agent in the container body 4 from flowing out of the first and second flow paths 29 and 30 during storage. Further, the inner lid 25 can be automatically detached from the boss portion 27 by the pressure of the compressed air from the compressor 3 at the time of puncture repair, and the sealing agent can flow out from the second flow path 30. .

  Next, the changeover switch 8 is interposed between the compressor 3 and the air intake 7. As shown in FIG. 1, the change-over switch 8 can switch the inflow port P0 connected to the compressor 3 to the first outflow port P1 or the second outflow port P2 by the forward and backward movement of the valve shaft 8A. The port switching is performed by a finger operation by an operator on the operation lever 8A1 arranged on one end side of the valve shaft 8A.

  Next, the injection hose 24 has a hose body 31 whose rear end portion is connected to the sealing agent / compressed air outlet port 28, and a front end portion of the hose body 31 via a fitting 32 in this example. It is formed from a connecting fitting 33 to be attached. The storage hose 24 is wrapped and held along a circumferential groove-shaped storage groove 34 formed around the lower end side of the storage case 2 during storage, and unwound from the storage groove 34 during puncture repair. Then, it is connected to the tire valve 35 of the tire T.

  Here, the tire valve 35 is an automotive tire valve conforming to a standard such as JIS D4207, and a general snap-in type is illustrated in FIG. The tire valve 35 has a known structure including a valve stem 37 fixed to the rim 36 and a valve core 38 mounted in an inner hole 40H of the valve stem 37. In this example, the valve stem 37 includes a rubber seat 39 that is attached to the rim 36 and a tubular valve stem body 40 that is integrally fixed to the rubber seat 39. On the side, an external thread portion 40A for screwing the valve cap 41 is formed, and on the inner peripheral side, an internal thread portion 40B for threading the valve core 38 is formed.

  The valve core 38 includes parts such as an axis A1, a head A2, a body packing A3, a body A4, a valve packing A5, a valve packing receiver A6, a spring A7, and a spring receiver A8. The head A2 and the body packing A3 And the body A4 are formed as an integrally connected unit 42 and fixed by the inner screw portion 40B. The shaft A1, the valve packing A5, and the valve packing receiver A6 are integrated, and are held by the unit 42 so as to be slidable up and down. The valve core 38 is normally in pressure contact with the valve portion K between the valve seat portion at the lower end of the body A4 and the valve packing A5 by a spring A7 interposed between the valve packing receiver A6 and the spring receiver A8. This closes the tire lumen in an airtight manner. When filling the tire lumen with air, the pressure of the filling air separates the valve seat at the lower end of the trunk A4 from the valve packing A5, and the filling air is injected through the gap.

  Next, as shown in FIG. 6, the connection fitting 33 of the injection hose 24 is a cylindrical connection fitting provided with a connection screw portion 45 that can be screwed to the outer screw portion 40 </ b> A of the valve stem body 40 at the front end. A main body 46, a closing cap 47 detachably disposed on the connection screw portion 45, and a cylindrical outer sleeve 48 fixed to the outer periphery of the connection fitting main body 46 are provided. In this example, the connection fitting body 46 has a stepped cylindrical shape with small diameter portions 46A and 46B provided before and after the large diameter portion 46C, and the internal thread-like connection screw portion 45 is formed in the inner hole 46H. ing.

  The closing cap 47 includes a knob 47a for picking and screwing the closing cap 47 with a finger, and an external screw protruding from the rear end of the knob 47a through a step and screwed into the connecting screw 45. And a threaded portion 47b. The knob 47a has a smaller diameter than the inner hole 48H of the outer sleeve 48, and projects a length L1 of at least 5 mm or more forward from the tip 48e of the outer sleeve 48. The protruding portion 47a1 allows the closing cap 47 to be picked and screwed with a finger and removed from the connection fitting main body 46. In order to facilitate the twisting, a knurled portion 47S composed of a plurality of grooves extending in the axial direction is provided on the outer peripheral surface of the knob portion 47a.

  The closing cap 47 includes a core pushing projection 47c that can push the tip of the valve core 38 of the tire valve 35 at the front end of the knob 47a. As shown in FIG. 7, the core pushing projection 47c pushes the tip of the valve core 38, that is, the tip of the shaft A1, so that the valve portion between the valve seat portion at the lower end of the body A4 and the valve packing A5. K can be separated and air in the tire can be exhausted from the tire valve 35. If the puncture repair device 1 is a general-purpose type, the compressed air filling hose 23 can be used to boost the low-pressure tire T to, for example, a standard internal pressure. The tire can be depressurized using the portion 47c. The core pushing projection 47c has a smaller diameter than the inner hole 40H of the valve stem body 40, and the projection height H from the front end of the knob 47a is preferably in the range of 2 to 4 mm.

  In the connection fitting 33, as shown in FIG. 8, the valve stem body 40 can be screwed to the connection fitting body 46 in place of the closure cap 47 by removing the closing cap 47. At this time, since the thickness of the connection fitting 33 is increased by the outer sleeve 48, the operability of the screw can be improved. The outer sleeve 48 is integrally fixed to the connection fitting main body 46 by press fitting or the like. Further, in order to further facilitate the above-described screwing, a knurled portion 48S composed of a plurality of grooves extending in the axial direction is formed on the outer peripheral surface thereof. The outer sleeve 48 has a projecting portion 48A that projects forward from the front end 46e of the connection fitting main body 46.

The projecting portion 48A functions as a shielding plate. For example, when the connection fitting main body 46 is removed from the valve stem main body 40 after the filling of the sealing agent and the compressed air is completed, the connection fitting main body 46 and the valve stem main body 40 are separated. When the sealing agent scatters from the gap, the projecting portion 48A can prevent the sealing agent from splashing to the rear side. Therefore, it is possible to prevent the sealing agent from adhering to the worker, and the puncture repair work can be performed cleanly. For this purpose, it is preferable that an amount L2 of the projecting portion 48A from the front end 46e of the connection fitting main body 46 is 1 to 5 mm. If it is less than 1.0 mm, the shielding function is insufficient, and if it exceeds 5.0 mm, the mounting property to the valve stem body 40 is lowered. In addition, a small-diameter portion 46A is provided on the front end side of the connection fitting main body 46, and a small gap G is formed between it and the outer sleeve 48. The small gap G is useful for improving the shielding function.

  In this example, as shown in FIG. 8, the connection fitting 33 is attached to the hose body 31 via a cylindrical joint fitting 32 having an inner hole 32H communicating with the inner hole 46H. The joint fitting 32 is inserted into the inner hole 46H of the connection fitting main body 46, and is connected to the connection fitting main body 46 so as to be rotatable, and is integrally connected to the trunk portion 32A and extends backward. In addition, for example, the hose body 31 is provided with a tapered taper hose connecting portion 32B that can be fitted, for example. The body portion 32A engages with a step portion 46H1 provided in the inner hole 46H and is prevented from coming off. In addition, a packing material 50 that is tightly sealed with the valve stem body 40 and is sealed is disposed at the front end portion of the body portion 32A, and airtight connection is performed. Reference numeral 51 denotes a protrusion provided at the front end portion of the body portion 32A. When the valve stem main body 40 is screwed to the connection fitting main body 46, the protrusion 51 pushes the tip of the valve core 38, and The part K is separated. Reference numeral 52 denotes a ring-shaped hose clamp that fixes the hose body 31 with a small pressure between the hose body 31 and the hose coupling portion 32B. As the fitting 32, various conventional structures can be adopted. Further, the hose connecting portion 32 is connected to the connecting fitting main body 46 so that the hose main body 31 is directly attached to the connecting fitting 33 without using the fitting 32. It can also be formed.

  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.

It is a diagram which shows notionally the puncture repair apparatus using the injection hose of the present invention. It is a perspective view of a puncture repair apparatus. It is a perspective view which shows the inside of a puncture repair apparatus. It is sectional drawing which shows the principal part of a sealing agent container. It is sectional drawing which shows a tire valve. It is sectional drawing which shows the connection metal fitting of an injection hose. It is sectional drawing which shows the effect | action of the core pushing protrusion provided in a closing cap. It is sectional drawing which shows the attachment state of a connection metal fitting and a tire valve. (A) is a conceptual diagram which shows the piping state of the conventional puncture repair apparatus, (B) is a conceptual diagram which shows a general purpose puncture repair apparatus piping state.

Explanation of symbols

6 Sealing agent container 24 Injection hose 31 Hose body 33 Connection fitting 35 Tire valve 37 Valve stem 38 Valve core 45 Connection screw portion 46 Connection fitting body 47 Closing cap 47c Core pushing projection 48 Outer sleeve 48A Overhang portion 48S Knurl portion T Tire

Claims (5)

It consists of a hose body whose rear end is connected to a sealant container containing a sealant that seals a punctured tire, and a fitting that is attached to the front end of the hose body and can be connected to a tire valve of a punctured tire. ,
The connection fitting includes a connection fitting main body provided at a front end portion with a connection screw portion that can be screwed to a valve stem of the tire valve, and the connection screw portion is detachably disposed on the connection screw portion, and the connection screw portion is removed by the removal. A closure cap that can be screwed to the stem, and a cylindrical outer sleeve fixed to the outer periphery of the connection fitting body;
The outer sleeve has a projecting portion that projects forward from the front end of the connection fitting main body , and the connection fitting main body has a small diameter portion on the front end side, and the inner peripheral surface of the small diameter portion and the outer sleeve. A sealing agent injection hose characterized by having a gap therebetween.   2. The sealing agent according to claim 1, wherein the closing cap is formed with a core pushing protrusion capable of exhausting air in the tire from the tire valve by pushing a tip of a valve core of the tire valve at a front end thereof. Injection hose.   3. The sealing agent injection hose according to claim 1, wherein the projecting portion of the outer sleeve has a projecting amount of 1 to 5 mm from the front end of the connection fitting main body.   The sealing sleeve injection hose according to any one of claims 1 to 3, wherein the outer sleeve is provided with a knurled portion including a plurality of grooves extending in an axial direction on an outer peripheral surface thereof. A puncture repair device for an automobile tire that contains a compressor that generates compressed air in a storage case, and a sealing agent container that is supplied with compressed air from the compressor and contains a sealing agent. A puncture repair device for an automobile tire, characterized in that the rear end portion of the injection hose according to any one of claims 1 to 4 is connected to a sealing agent / compressed air outlet .

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