JP2020193926A - Gas type inspection device and gas type inspection method of eye joint ferrule-equipped hose - Google Patents

Abstract

To provide a gas type inspection device and a gas type inspection method of an eye joint ferrule-equipped hose that can simultaneously detect defects such as gas leak from a hose, an eye joint ferrule, and a sheet surface of the eye joint ferrule.SOLUTION: A gas type inspection device 1 comprises a first compression gas source 2 for supplying first gas 102 to an eye joint ferrule-equipped hose 10 from a side where an eye joint ferrule 12 is mounted, resin members 31 and 32 in close contact with an entire surface of a sheet surface 16 and sandwiching a circular ring part 15, and a pressure sensor 5 for measuring a pressure and a pressure drop amount of the first gas 102 in the eye joint ferrule-equipped hose 10.SELECTED DRAWING: Figure 3

Description

The present invention relates to a gas type inspection device and a gas type inspection method for inspecting defects such as gas leakage from a hose with an eye joint fitting.

The brakes of automobiles work by converting the pedal effort into hydraulic pressure, and the brake oil that transmits the hydraulic pressure is sent to the brake caliper through the brake hose. Conventionally, a brake hose used in an automobile has an eye joint metal fitting attached to the tip, and is connected to a brake caliper via the eye joint metal fitting.

If there is a defect such as a scratch on the brake hose, the brake oil may leak from it, so the brake hose needs to be highly airtight. Then, in such a hose, it is necessary to inspect the airtightness in advance.

As a method for inspecting the tightness of a hose, for example, a water leak inspection by water pressure can be mentioned. However, hoses with specially shaped mouth fittings such as eye joint fittings and T-shaped fittings have poor drainage after inspection, and the water remaining in the hose causes rusting of the fittings. .. Therefore, it is necessary to provide a drying step after the inspection.

Therefore, as a method for solving the above-mentioned water drainage problem, a gas leak inspection by air pressure can be mentioned. In Patent Document 1, although it is different from the hose, the air pressure in the tire is measured, and the air pressure that recognizes the air pressure leak is recognized depending on whether the measured pressure is within a predetermined range based on the pressure before the start of measurement. A leak detection device and an air pressure leak detection method are disclosed.

JP 2001-289730

By the way, the seat surfaces provided on both sides of the ring portion of the eye joint metal fittings are the parts that are connected to the caliper via washers, etc., but if there is a defect such as scratches on the seat surface, brake oil may leak from there. There is. Of the hose with eye joint metal fittings, the seat surface, which is the part exposed to the outside, is liable to be scratched during the manufacturing process, transportation process, etc. Therefore, it is necessary to detect the scratch on the seat surface in advance as well as the scratch on the hose. is there. However, in the past, scratch inspection on the sheet surface was performed visually, resulting in poor work efficiency and a risk of oversight.

Therefore, an object of the present invention is a gas type inspection device and a gas type inspection of a hose with an eye joint metal fitting, which can simultaneously detect defects such as gas leakage from the seat surface of the hose, the eye joint metal fitting, and the eye joint metal fitting. To provide a method.

The gas type inspection device according to the present invention is a gas type inspection device for a hose in which an eye joint metal fitting having an annular portion provided with sheet surfaces on both sides is attached to the end side, and the eye joint metal fitting is attached. A gas supply means for supplying gas to the hose from the side of the hose, a resin member which is in close contact with the entire surface of the seat and sandwiches the annular portion, and a pressure sensor for measuring the pressure and pressure drop of the gas in the hose. It is characterized by having.

In the above configuration, the resin member is brought into close contact with the entire seat surface of the eye joint metal fitting, and gas is supplied to the hose from the side to which the eye joint metal fitting is attached in a state where the annular portion is sandwiched by the resin member. At this time, if there is a defect such as a scratch on the sheet surface, a gap is generated between the resin member and the sheet surface, and gas leaks from the gap to reduce the pressure. Therefore, in the above configuration, by measuring the amount of gas pressure drop in the hose with the eye joint fitting, it is possible to simultaneously detect defects such as gas leakage from the seat surface of the hose, the eye joint fitting and the eye joint fitting. ..

Further, the present invention comprises a second gas supply means for supplying a gas having a lower pressure than the gas supplied by the gas supply means to the hose from the side to which the eye joint fitting is attached in the gas type inspection device. It is preferable to include a flow rate sensor for measuring the flow rate of the gas flowing through the hose.

Foreign matter may get inside the hose during the manufacturing process. Foreign matter inside the hose may significantly reduce the brake oil transmission performance of the hose with eye joint fittings, and in addition to the above-mentioned inspection of defects such as gas leakage from the hose, eye joint fittings and seat surface, the hose It is required to carry out a clogging inspection.

However, when performing a hose clogging inspection using the gas supplied to the hose (hereinafter referred to as the first gas) in order to detect defects such as gas leakage from the hose, eye joint fittings and seat surface, the first step is Foreign matter in the hose may be forcibly pushed out by the pressure of the gas. In such a case, it becomes difficult to identify the cause of the clogging, which is inappropriate from the viewpoint of preventing the recurrence of the clogging.

Therefore, according to the above configuration, a gas having a lower pressure than the first gas (hereinafter referred to as a second gas) is supplied to the hose from the side to which the eye joint fitting is attached, and the second gas passes through the hose by the flow rate sensor. By measuring the flow rate of the hose, it is possible to inspect the hose for clogging without pushing out foreign matter in the hose.

Further, in the present invention, in the gas type inspection apparatus, it is preferable that the resin member is made of polybutylene terephthalate.

If the material of the resin member that adheres to the entire surface of the sheet is too hard or too soft, the sheet surface cannot be sufficiently sealed, and even if the sheet surface is not scratched, gas may leak out. Therefore, by using polybutylene phthalate having an appropriate hardness for the resin member, the seat surface can be sufficiently sealed. Therefore, if the seat surface is not scratched, gas leakage does not occur and the seat surface of the eye joint metal fitting is scratched. Can be detected more reliably.

Further, the gas type inspection method according to the present invention is a gas type inspection method of a hose in which an eye joint metal fitting having an annular portion provided with sheet surfaces on both sides is attached to an end side, and the resin member is described above. A resin member mounting step of closely contacting the entire surface of the seat and sandwiching the annular portion, a gas supply step of supplying gas to the hose from the side where the eye joint fitting is mounted, and a pressure sensor for the gas in the hose. It is characterized by comprising a pressure measuring step of measuring a pressure drop amount and simultaneously detecting defects in the hose, the eye joint fitting and the seat surface.

According to the above configuration, in the resin member mounting step, the resin member is brought into close contact with the entire seat surface of the eye joint metal fitting, and the annular portion is sandwiched between the resin members. In the subsequent gas supply process, when gas is supplied to the hose from the side where the eye joint fitting is attached, if there is a defect such as a scratch on the seat surface, a gap is created between the resin member and the seat surface, and gas is released from there. It leaks and the pressure drops. Then, in the pressure measurement process, by measuring the amount of pressure drop of the gas in the hose with the eye joint fitting, it is possible to simultaneously detect defects such as gas leakage from the seat surface of the hose, the eye joint fitting and the eye joint fitting. it can.

Further, in the above gas type inspection method, the present invention provides a second gas supply step of supplying a gas having a lower pressure than the gas supplied in the gas supply step to the hose from the side to which the eye joint fitting is attached, and a flow rate. It is preferable to include a flow rate measuring step of measuring the flow rate of the gas flowing through the hose by a sensor.

Foreign matter may get inside the hose during the manufacturing process. Foreign matter inside the hose may significantly reduce the brake oil transmission performance of the hose with eye joint fittings, and in addition to the above-mentioned inspection of defects such as gas leakage from the hose, eye joint fittings and seat surface, the hose It is required to carry out a clogging inspection.

However, when the hose is inspected for clogging using the first gas supplied to the hose in order to detect defects such as gas leakage from the hose, eye joint fittings and seat surface, the pressure of the first gas causes the hose. Foreign matter inside may be pushed out forcibly. In such a case, it becomes difficult to identify the cause of the clogging, which is inappropriate from the viewpoint of preventing the recurrence of the clogging.

Therefore, according to the above configuration, in the second gas supply step, the second gas having a lower pressure than the first gas is supplied to the hose from the side where the eye joint fitting is attached, and passes through the hose in the flow rate measurement step. By measuring the flow rate of the second gas, it is possible to inspect the hose for clogging without pushing out foreign matter in the hose.

Further, in the present invention, in the above gas type inspection method, it is preferable that the resin member is made of polybutylene terephthalate.

If the material of the resin member that adheres to the entire surface of the sheet is too hard or too soft, the sheet surface cannot be sufficiently sealed, and even if the sheet surface is not scratched, gas may leak out. Therefore, by using polybutylene phthalate having an appropriate hardness for the resin member, the seat surface can be sufficiently sealed. Therefore, if the seat surface is not scratched, gas leakage does not occur and the seat surface of the eye joint metal fitting is scratched. Can be detected more reliably.

According to the present invention, a gas type inspection device and a gas type inspection method for a hose with eye joint metal fittings capable of simultaneously detecting defects such as gas leakage from the seat surface of the hose, eye joint metal fittings and eye joint metal fittings. Can be provided.

It is the schematic of the gas type inspection apparatus which concerns on embodiment. (A) is a perspective view of an eye joint metal fitting portion, and (b) is a sectional view taken along the line AA of FIG. 2 (a). It is a figure which shows the state before the resin member attachment process in the state which the hose with an eye joint metal fitting is attached to the attachment part of a gas type inspection apparatus. It is a figure which shows the state after the resin member attachment process in the state which the hose with an eye joint metal fitting is attached to the attachment part of a gas type inspection apparatus. FIG. 3 is an enlarged perspective view of an annular portion inserted into a pin. It is a figure which shows the region where a gas exists in a gas type inspection apparatus in a resin mounting process. It is a figure which shows the region where the compressed gas exists in the gas type inspection apparatus in the 1st gas supply process. It is a figure which shows the compressed gas sealed in the pressure measurement area in a gas type inspection apparatus. It is a figure which shows the region where the gas exists in the gas type inspection apparatus in the 2nd gas supply process and the flow rate measurement process.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

In the present embodiment, the gas type inspection device 1 is a device for inspecting the hose 10 with an eye joint fitting. As shown in FIG. 1, the gas type inspection device 1 attaches a first compressed gas source 2 for feeding the first gas 102, a second compressed gas source 3 for feeding the second gas 103, and a hose 10 with an eye joint fitting. It is composed of a mounting portion 4, a pressure sensor 5 for measuring the pressure of gas in the hose 10 with eye joint fittings, and a flow sensor 6 for measuring the flow rate of gas flowing in the hose 10 with eye joint fittings. The first compressed gas source 2 and the pressure sensor 5 are connected to the mounting portion 4 via the pipe 7, respectively. Further, the second compressed gas source 3 is connected to the flow rate sensor 6 via the pipe 7, and the flow rate sensor 6 is further connected to the mounting portion 4 via the pipe 7.

Further, two sluice valves 21 and 22 are arranged in series between the first compressed gas source 2 and the mounting portion 4. The pipe 7 is branched between the sluice valves 21 and 22, and the sluice valve 23 is arranged at the tip of the branched pipe 7, and the tip further leads to the atmosphere.
Further, a sluice valve 24 is arranged between the second compressed gas source 3 and the flow rate sensor 6, and a check valve 25 is arranged between the flow rate sensor 6 and the mounting portion 4.

(Hose 10 with eye joint bracket)
As shown in FIG. 2A, the hose 10 with an eye joint fitting includes a hose 11 and an eye joint fitting 12 attached to the end side of the hose 11. Further, the eye joint metal fitting 12 has a hose connecting portion 13, a neck portion 14, and an annular portion 15. The hose connecting portion 13 is provided on one end side of the eye joint metal fitting 12, and is a portion connected to the hose 11. The neck portion 14 is a portion that connects the hose connecting portion 13 and the annular portion 15. Further, the axes of the hose 11, the hose connecting portion 13, and the neck portion 14 are aligned with each other. The annular portion 15 is an annular portion provided at the other end of the eye joint metal fitting 12, and has a substantially flat sheet surface 16 on both sides. Further, the axis of the annular portion 15 and the axis of the hose 11 are orthogonal to each other.

Further, as shown in FIG. 2B, the through hole 17 penetrates the inside of the hose connecting portion 13, the inside of the neck portion 14, and the side wall surface of the substantially central portion on both sides of the annular portion 15. The through hole 17 is connected to the pipe in the hose 11.

The eye joint metal fitting 12 may be attached only to one end side of the hose 11 or may be attached to both ends. When the eye joint metal fitting 12 is attached only to one end side of the hose 11, the one attached to the other end side includes, for example, a male metal fitting and a female metal fitting, but other metal fittings may also be used.

(Compressed gas sources 2 and 3)
The first compressed gas source 2 is a compressed gas source that supplies the first gas 102 (for example, 15.3 MPa). The second compressed gas source 3 is a compressed gas source that supplies a second gas 103 (for example, 0.2 to 0.3 MPa) having a lower voltage than the first gas 102. The first gas 102 and the second gas 103 supplied from the first compressed gas source 2 and the second compressed gas source 3 are sent to the hose 10 with the eye joint fitting through the pipe 7.
The first gas 102 and the second gas 103 are generally air, but other gases may be used.

(Mounting part 4)
As shown in FIGS. 3 and 4, the mounting portion 4 has a pin 30, resin members 31 and 32, a pressure cylinder 33, and a protective plate 34. Hereinafter, in FIGS. 3 to 5, the side of the mounting portion 4 on which the pressure cylinder 33 and the resin member 32 are arranged is defined as the upper side, and the side on which the pin 30 and the resin member 31 are arranged is defined as the lower side.

The pin 30 has a cylindrical shape, and its outer diameter is smaller than the inner diameter of the annular portion 15 of the eye joint metal fitting 12. As shown in FIG. 5, the pin 30 is inserted into the annular portion 15 from the lower side in the direction perpendicular to the seat surface 16. Further, the pin 30 has a gas supply hole 35 inside the pin 30 for supplying the gas sent from the pipe 7 to the hose.

As shown in FIGS. 4 and 5, the gas supply hole 35 is connected to the pipe 7 and extends from the lower side to the upper side of the pin 30 to a predetermined position inside the pin 30. Here, the predetermined position means that when the pin 30 is inserted into the annular portion 15, the pin 30 and the annular portion 15 are viewed from a direction perpendicular to the axis of the pin 30. It is an arbitrary point inside the pin 30 in the overlapping portion. Then, at the predetermined position, the pin 30 is bent outward in the direction perpendicular to the extension direction, that is, in the radial direction of the pin 30, and is inserted to the side surface of the pin 30.

The bending position of the gas supply hole 35 is preferably substantially the same plane as the midpoint between the upper and lower surfaces of the annular portion 15, and the gas supply hole 35 is branched and bent in four directions toward the outer side in the radial direction of the pin 30. Is preferable. With these configurations, gas can be efficiently supplied to the hose 10 with the eye joint fitting.
Further, the angles of the branches in the four directions are preferably evenly spaced from each other. As a result, the gas can be evenly supplied to the seat surface 16, so that defects such as scratches on the seat surface 16 can be detected more reliably.

The resin members 31 and 32 are annular members. As shown in FIG. 3, the resin member 31 is attached to the pin 30, and the resin member 32 is attached to the tip of the pressure cylinder 33, which will be described later. Further, when the hose 10 with the eye joint fitting is fixed and gas is supplied, as shown in FIG. 4, the resin members 31 and 32 are in close contact with the entire surfaces of the upper and lower seat surfaces 16 and the annular portion 15 is provided. Is sandwiched.

The materials of the resin members 31 and 32 are not particularly limited, but it is preferable that the resin members 31 and 32 are made of a material that does not damage the sheet surface 16 and can sufficiently secure the airtightness when the resin members 31 and 32 are brought into close contact with the entire surface of the sheet surface 16. Therefore, examples of the materials of the resin members 31 and 32 include polyethylene terephthalate and polybutylene terephthalate, but polybutylene terephthalate is most preferable from the viewpoint of price.

Further, although the resin members 31 and 32 may be made of different materials, they are preferably made of the same material in order to make the accuracy of defect inspection such as scratches on the sheet surfaces 16 on both sides uniform.

As shown in FIG. 3, the pressure cylinder 33 is arranged on the same axis as the pin 30 and above the mounting portion 4. As described above, the resin member 32 is attached to the tip of the pressure cylinder 33 so that it can be raised and lowered along the axis.

The protective plate 34 is a member that protects the contact surface of the resin member 32 with the sheet surface 16. As shown in FIG. 3, the protective plate 34 is provided between the pressure cylinder 33 and the resin member 32, and the pin 30 and the resin member 31, and has a structure capable of accommodating the protective plate 34. As shown in FIG. 4, the protective plate 34 is accommodated by moving on an axis perpendicular to the axial direction of the pin 30 and the pressure cylinder 33. The protective plate 34 prevents the contact surface of the resin member 32 with the seat surface 16 from being damaged by contact with the eye joint metal fitting 12, for example, when the hose 10 with the eye joint metal fitting is attached to the attachment portion 4.
The protective plate 34 may not be arranged.

(Pressure sensor 5)
The pressure sensor 5 is a sensor that measures the pressure of a gas in a closed space including the pressure sensor 5. In the present embodiment, the pressure sensor 5, the sluice valve 22, the hose 10 with the eye joint fitting, and the check valve 25 are sealed in a state where the end side of the hose 10 with the eye joint fitting that is not connected to the mounting portion 4 is sealed. The pressure of the first gas 102 enclosed in the region surrounded by is measured (see FIG. 1).

(Flow sensor 6)
The flow rate sensor 6 is a sensor that measures the flow rate of gas passing through the flow rate sensor 6. In the present embodiment, the flow sensor 6 passes from the sluice valve 24 side toward the check valve 25 side in a state where the end side of the hose 10 with eye joint metal fittings that is not connected to the mounting portion 4 is open to the atmosphere. The flow rate of the second gas 103 is measured (see FIG. 1).

(Sluice valve)
The sluice valves 21, 22 and 24 are valves that can be opened and closed. The first gas 102 is supplied from the first compressed gas source 2 when the sluice valve 21 is open, and is not supplied when the sluice valve 21 is closed. Further, the second gas 103 is supplied from the second compressed gas source 3 when the sluice valve 24 is open, and is not supplied when the sluice valve 24 is closed. When the sluice valve 22 is closed, the supply of the first gas 102 sent from the first compressed gas source 2 to the mounting portion 4 is stopped. Further, the sluice valve 23 is open to the atmosphere, and is open to the atmosphere when the valve is open.

(Check valve)
The check valve 25 has a function of always keeping the gas flow in one direction and preventing the backflow. In the present embodiment, the check valve 25 is arranged between the flow rate sensor 6 and the mounting portion 4, and the second gas 103 supplied from the second compressed gas source 3 is in the direction from the flow rate sensor 6 to the mounting portion 4. Only flows to.

Subsequently, an inspection method of the hose 10 with an eye joint fitting using the gas type inspection device 1 described above will be described with reference to FIGS. 6 to 9. In FIGS. 6 to 9, the thick line portion of the pipe 7 is the region where the first gas 102 and / or the second gas 103 exists in each step.

(Resin member mounting process)
First, as shown in FIG. 6, with the sluice valves 21 and 24 closed and the sluice valve 22 open, the resin to which the eye joint metal fitting 12 of the hose 10 with the eye joint metal fitting is attached is attached to the attachment portion 4. Perform the member mounting process. At this time, the first gas 102 and the second gas 103 are not supplied into the gas type inspection device 1. Then, as shown in FIG. 3, the seat surface 16 of the annular portion 15 of the eye joint metal fitting 12 is inserted into the pin 30 from above so as to be perpendicular to the pin 30. At this time, the seat surface 16 on the lower side of the annular portion 15 is in contact with the resin member 31. Subsequently, as shown in FIG. 4, the protective plate 34 is housed and the pressure cylinder 33 is lowered so that the resin member 32 and the entire surface of the seat surface 16 on the upper side of the annular portion 15 are brought into close contact with each other. Further, since the annular portion 15 is pressed against the resin member 31 by the pressure cylinder 33, the resin member 31 and the entire surface of the seat surface 16 on the lower side of the annular portion 15 are sufficiently brought into close contact with each other. As described above, both the upper and lower surfaces of the annular portion 15 are sandwiched between the resin members 31 and 32, and the resin member attaching step is completed.

(First gas supply process)
First, as shown in FIG. 7, the side of the hose 10 with eye joint fittings that is not attached to the attachment portion 4 is sealed with a member made of urethane resin or the like. Next, the first gas 102 is supplied from the first compressed gas source 2 with the sluice valve 23 closed and the sluice valves 21 and 22 open. The sluice valve 22 is closed when the pressure in the hose 10 with the eye joint fitting reaches the supply pressure of the first gas 102, that is, when the inside of the hose 10 with the eye joint fitting is filled with the first gas 102. At this time, the area of the pipe 7 surrounded by the pressure sensor 5, the sluice valve 22 and the check valve 25 and the inside of the hose 10 with the eye joint fitting whose one side is sealed are combined (hereinafter, pressure measurement). The first gas 102 is sealed in the region) (see FIG. 8).
If any of the hose 11, the eye joint metal fitting 12, and the seat surface 16 has a defect such as a scratch, the pressure in the hose 10 with the eye joint metal fitting does not reach the supply pressure of the first gas 102 in this step. Sometimes. In this case, the hose 10 with the eye joint fitting is determined to be a defective product without performing the subsequent pressure measurement step.

After closing the sluice valve 22, the sluice valve 21 is closed and the supply of the first gas 102 from the first compressed gas source 2 is stopped. Then, the sluice valve 23 is opened, and the first gas 102 remaining in the region surrounded by the sluice valve 21, the sluice valve 22 and 23 of the pipe 7 is opened to the atmosphere.

(Pressure measurement process)
The pressure sensor 5 measures the amount of pressure drop in the pressure measurement region with reference to the pressure in the pressure measurement region immediately after the filling of the first gas 102 is completed. Then, when the pressure drop amount in the pressure measurement region is equal to or more than the specified value, it is determined that the hose 10 with the eye joint fitting has a defect such as a scratch on any of the hose 11, the eye joint fitting 12, and the seat surface 16.
If any of the hose 11, the eye joint fitting 12, and the seat surface 16 of the hose 10 with the eye joint fitting has a defect such as a scratch, the enclosed first gas 102 leaks from the pressure measurement region and the pressure drops. Therefore, by measuring the amount of pressure drop in the pressure measuring region, it is possible to simultaneously detect defects such as gas leakage from the hose 11, the eye joint fitting 12, and the seat surface 16 of the hose 10 with the eye joint fitting.

Here, the specified value is arbitrary depending on the pressure of the first gas 102 supplied by the first compressed gas source 2, the type of the hose 10 with the eye joint metal fitting to be inspected, the measurement performance of the pressure sensor 5, and the like. The value of is set.

If the detected pressure drop is less than the specified value in this step, it is judged that there is no defect such as scratches on the hose 11, eye joint metal fitting 12, and seat surface 16, and the subsequent second gas supply step and flow rate measurement step I do. After the pressure measurement step and before proceeding to the second gas supply step, the sluice valve 22 is opened, and the first gas 102 in the pressure measurement region is opened to the atmosphere through the already opened sluice valve 23 (see FIG. 8). ).

(Second gas supply process)
First, the seal on the side of the hose 10 with the eye joint fitting that is not attached to the attachment portion 4 is removed and the hose 10 is opened to the atmosphere. Subsequently, after closing the sluice valve 22, the sluice valve 24 is opened, and the second gas 103 is supplied from the second compressed gas source 3. As a result, as shown in FIG. 9, the second gas 103 flows in the pipe 7 in the order of the flow rate sensor 6, the check valve 25, the mounting portion 4, and the hose 10 with the eye joint fitting, and is discharged to the atmosphere.
By arranging the check valve 25, the first gas 102 does not flow from the mounting portion 4 toward the flow rate sensor 6.

(Flow rate measurement process)
The flow rate value of the second gas 103 flowing through the flow rate sensor 6 is measured. Since the second gas 103 flows in the order described above, the flow rate of the gas flowing through the flow rate sensor 6 is the same as the flow rate of the gas flowing in the hose 10 with the eye joint fitting. If foreign matter or the like is present inside the hose 10 with the eye joint fitting, the flow of gas through the hose 10 with the eye joint fitting is obstructed by them, and the flow rate of the second gas 103 flowing through the flow sensor 6 decreases. .. Therefore, by measuring the flow rate of the second gas 103 flowing through the flow rate sensor 6, it is possible to detect the presence or absence of clogging due to foreign matter or the like inside the hose 10 with the eye joint fitting.
As described above, by using the second gas 103 having a lower pressure than the first gas 102, the clogging inspection can be performed without forcibly pushing out the foreign matter inside the hose 10 with the eye joint fitting.

The opening and closing of the sluice valves 21, 22 and 24 may be switched manually, but is preferably performed automatically by a solenoid valve or the like.

According to the configuration of the above embodiment, in the gas type inspection device 1 according to the present embodiment, the eye joint metal fitting 12 having the annular portion 15 provided with the sheet surfaces 16 on both sides is attached to the end side. A gas type inspection device 1 for a hose 10 with metal fittings, the first compressed gas source 2 for supplying the first gas 102 to the hose 10 with metal fittings from the side to which the eye joint metal fittings 12 are attached, and the entire surface 16 of the seat surface. It is characterized by comprising resin members 31 and 32 that are in close contact with the ring portion 15 and sandwiching the annular portion 15, and a pressure sensor 5 that measures the pressure and the amount of pressure drop of the first gas 102 in the hose 10 with eye joint fittings. ..

In the above configuration, the resin members 31 and 32 are brought into close contact with the entire surface 16 of the seat surface 16 of the eye joint metal fitting 12, and the annular portion 15 is sandwiched between the resin members 31 and 32 from the side to which the eye joint metal fitting 12 is attached. The first gas 102 is supplied to the hose 10 with the eye joint fitting. At this time, if there is a defect such as a scratch on the sheet surface 16, a gap is generated between the resin members 31 and 32 and the sheet surface 16, and the first gas 102 leaks from the gap to reduce the pressure. Therefore, in the above configuration, by measuring the amount of pressure drop of the first gas 102 in the hose 10 with the eye joint fitting, gas leakage from the seat surface 16 of the hose 11, the eye joint fitting 12, and the eye joint fitting 12 can be caused. Defects can be detected at the same time.

Further, the gas type inspection device 1 according to the present embodiment supplies a second gas 103 having a lower pressure than the first gas 102 to the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached. It is characterized by including a source 3 and a flow rate sensor 6 for measuring the flow rate of the second gas 103 flowing in the hose 10 with an eye joint fitting.

Foreign matter or the like may be mixed inside the hose 11 in the manufacturing process or the like. Foreign matter inside the hose 11 may significantly reduce the brake oil transmission performance of the hose 10 with eye joint fittings, and inspection of defects such as gas leakage from the hose 11, eye joint fittings 12 and seat surface 16 described above. At the same time, it is required to inspect the hose 11 for clogging.

However, in order to detect a defect such as gas leakage from the hose 11, the eye joint metal fitting 12, and the seat surface 16, the first gas 102 supplied to the hose 10 with the eye joint metal fitting is used, and the hose 10 with the eye joint metal fitting is used. When performing a clogging inspection, the pressure of the first gas 102 may forcibly push out foreign matter in the hose 10 with the eye joint fitting. In such a case, it becomes difficult to identify the cause of the clogging, which is inappropriate from the viewpoint of preventing the recurrence of the clogging.

Therefore, according to the above configuration, the second gas 103, which has a lower pressure than the first gas 102, is supplied to the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached, and the hose with the eye joint fitting 12 is supplied by the flow sensor 6. By measuring the flow rate of the second gas 103 passing through the inside of the hose 10, it is possible to inspect the hose 10 with the eye joint fitting for clogging without pushing out the foreign matter in the hose 10 with the eye joint fitting.

Further, in the gas type inspection device 1 according to the present embodiment, it is preferable that the resin members 31 and 32 are made of polybutylene terephthalate.

If the materials of the resin members 31 and 32 that are brought into close contact with the entire surface of the sheet surface 16 are too hard or too soft, the sheet surface 16 cannot be sufficiently sealed, and even if the sheet surface 16 is not scratched, gas may leak out. There is. Therefore, by using polybutylene phthalate having an appropriate hardness for the resin members 31 and 32, the seat surface 16 can be sufficiently sealed. Therefore, if the seat surface 16 is not scratched, gas leakage does not occur and the eye joint metal fittings are used. It is possible to more reliably detect scratches on the seat surface 16 of 12.

Further, in the gas type inspection method according to the present embodiment, the gas type inspection of the hose 10 with the eye joint metal fitting, in which the eye joint metal fitting 12 having the annular portion 15 provided with the seat surface 16 on both sides is attached to the end side. According to the method, the resin member 31 and 32 are brought into close contact with the entire surface of the seat surface 16 and the annular portion 15 is sandwiched between the resin member attachment step and the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached. The first gas supply process for supplying the gas 102 and the pressure drop amount of the first gas 102 in the hose 10 with the eye joint metal fitting are measured by the pressure sensor 5, and the hose 11, the eye joint metal fitting 12, and the seat surface 16 are defective. It is characterized by including a pressure measuring step for detecting at the same time.

According to the above configuration, in the resin member attaching step, the resin members 31 and 32 are brought into close contact with the entire surface 16 of the seat surface 16 of the eye joint metal fitting 12, and the annular portion 15 is sandwiched between the resin members 31 and 32. In the subsequent first gas supply step, when the first gas 102 is supplied to the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached, if there is a defect such as a scratch on the seat surface 16, the resin members 31 and 32 A gap is formed between the surface 16 and the sheet surface 16, from which the first gas 102 leaks and the pressure drops. Then, in the pressure measuring step, by measuring the amount of pressure drop of the first gas 102 in the hose 10 with the eye joint fitting, gas leakage from the seat surface 16 of the hose 11, the eye joint fitting 12, and the eye joint fitting 12 and the like, etc. Problems can be detected at the same time.

Further, the gas type inspection method according to the present embodiment is a second gas supply step of supplying a second gas 103 having a lower pressure than the first gas 102 to the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached. It is characterized by including a flow rate measuring step of measuring the flow rate of the second gas 103 flowing in the hose 10 with the eye joint fitting by the flow rate sensor 6.

Foreign matter or the like may be mixed inside the hose 11 in the manufacturing process or the like. Foreign matter inside the hose 11 may significantly reduce the brake oil transmission performance of the hose 10 with eye joint fittings, and inspection of defects such as gas leakage from the hose 11, eye joint fittings 12 and seat surface 16 described above. At the same time, it is required to inspect the hose 11 for clogging.

However, in order to detect a defect such as gas leakage from the hose 11, the eye joint metal fitting 12, and the seat surface 16, the first gas 102 supplied to the hose 10 with the eye joint metal fitting is used, and the hose 10 with the eye joint metal fitting is used. When performing a clogging inspection, the pressure of the first gas 102 may forcibly push out foreign matter in the hose 10 with the eye joint fitting. In such a case, it becomes difficult to identify the cause of the clogging, which is inappropriate from the viewpoint of preventing the recurrence of the clogging.

Therefore, according to the above configuration, in the second gas supply step, the second gas 103 having a lower pressure than the first gas 102 is supplied to the hose 10 with the eye joint fitting 12 from the side to which the eye joint fitting 12 is attached, and the flow rate is measured. In the process, by measuring the flow rate of the second gas 103 passing through the hose 10 with the eye joint fitting, the hose 10 with the eye joint fitting is inspected for clogging without pushing out the foreign matter in the hose 10 with the eye joint fitting. be able to.

Further, in the gas type inspection method according to the present embodiment, it is preferable that the resin members 31 and 32 are made of polybutylene terephthalate.

If the materials of the resin members 31 and 32 that are brought into close contact with the entire surface of the sheet surface 16 are too hard or too soft, the sheet surface 16 cannot be sufficiently sealed, and even if the sheet surface 16 is not scratched, gas may leak out. There is. Therefore, by using polybutylene phthalate having an appropriate hardness for the resin members 31 and 32, the seat surface 16 can be sufficiently sealed. Therefore, if the seat surface 16 is not scratched, gas leakage does not occur and the eye joint metal fittings are used. It is possible to more reliably detect scratches on the seat surface 16 of 12.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these examples, and various modifications can be made as long as they are described in the claims.

For example, in the above embodiment, the case where the side of the hose 10 with the eye joint fitting that is not attached to the attachment portion 4 is sealed with urethane resin in the resin member attachment step has been described, but the eye is attached to both ends of the hose 11. When the joint metal fitting 12 is attached, the annular portion 15 of the two eye joint metal fittings 12 may be attached to the attachment portion 4 of two different gas inspection devices 1, respectively. In this case, the first gas 102 is supplied from the gas inspection device 1 to the hose 10 with eye joint fittings 12 having eye joint fittings 12 attached to both ends. Then, in the pressure measuring step, by measuring the amount of pressure drop in the hose 10 with the eye joint metal fitting, it is possible to simultaneously detect defects such as scratches on the seat surface 16 of the eye joint metal fittings 12 at both ends in one inspection. it can.

Further, the first compressed gas source 2 and the second compressed gas source 3 may be integrated. In this case, the compressed gas source can change the pressure of the supplied gas, and the first gas 102 and the second gas 103 are supplied from one compressed gas source, respectively. Further, in this case, the flow rate sensor 6 and the check valve 25 are arranged between the sluice valve 21 and the sluice valve 22. Then, in both the first gas supply step and the second gas supply step, the first gas 102 or the second gas 103 is supplied with the sluice valves 21 and 22 open and the sluice valve 23 closed. Do.

Further, in the present embodiment, urethane resin is used as the resin for sealing the side of the hose 10 with the eye joint metal fitting that is not attached to the attachment portion 4, but other materials may be used.

Next, specific examples of the present invention will be described.
As an example, in the gas type inspection device 1 as shown in FIG. 1, the first compressed gas source 2 is set so that the supply pressure of the first gas 102 is 15.3 MPa, and a scratch detection test on the sheet surface 16 is performed. went. In the scratch detection test, the amount of pressure drop is measured by the gas inspection device 1 for a plurality of samples (hose 10 with eye joint fittings) having scratches having different depths from the inner surface to the outer surface of the seat surface 16. did. Then, when the pressure drop amount is equal to or more than the specified value, the scratch on the seat surface 16 is detectable, and when it is less than the specified value, it is determined to be undetectable. The specified value was 0.15 MPa, which corresponds to about 1% of the supply pressure of the first gas 102. The photographs of the sheet surface 16 of each sample, the scratch depth, and the measured values of the pressure drop amount are shown in Table 1 below.
It is assumed that the hose 11 is not scratched for each sample used in the examples.

As shown in Table 1, when the sheet surface 16 had a scratch having a depth of 21 μm or more, the pressure drop amount showed a specified value or more, and it was found that the scratch was detectable. The depth of scratches on the seat surface 16 where the brake oil actually leaks is 30 μm or more, and it can be said that the scratch detection accuracy of the seat surface 16 in the present invention is sufficient to detect these.

1 Gas type inspection device 2 1st compressed gas source 3 2nd compressed gas source 4 Mounting part 5 Pressure sensor 6 Flow sensor 7 Piping 10 Hose with eye joint metal fittings 11 Hose 12 Eye joint metal fittings 15 Ring part 16 Seat surfaces 21, 22 , 23, 24 Gate valve 25 Check valve 30 Pin 31, 32 Resin member 33 Pressurized cylinder 34 Protective plate 35 Gas supply hole 102 First gas 103 Second gas

Claims (6)

The eye joint metal fitting having an annular portion provided with a seat surface on both sides is a gas inspection device for a hose attached to the end side.
A gas supply means for supplying gas to the hose from the side to which the eye joint fitting is attached, and
A resin member that adheres to the entire surface of the sheet and sandwiches the annular portion,
A gas type inspection device including a pressure sensor for measuring the pressure of gas in the hose and the amount of pressure drop. A second gas supply means that supplies a gas having a lower pressure than the gas supplied by the gas supply means to the hose from the side to which the eye joint fitting is attached.
The gas type inspection apparatus according to claim 1, further comprising a flow rate sensor for measuring the flow rate of the gas flowing in the hose. The gas-type inspection device according to claim 1 or 2, wherein the resin member is made of polybutylene terephthalate. An eye joint metal fitting having an annular portion provided with seat surfaces on both sides is a gas inspection method for a hose attached to the end side.
A resin member mounting process in which the resin member is brought into close contact with the entire surface of the sheet and the annular portion is sandwiched between the resin members.
A gas supply process for supplying gas to the hose from the side to which the eye joint fitting is attached, and
A gas type inspection method comprising a pressure measuring step of measuring a pressure drop amount of a gas in the hose with a pressure sensor and simultaneously detecting defects in the hose, the eye joint fitting, and the seat surface. A second gas supply step of supplying a gas having a lower pressure than the gas supplied in the gas supply step to the hose from the side to which the eye joint fitting is attached,
The gas type inspection method according to claim 4, further comprising a flow rate measuring step of measuring the flow rate of the gas flowing in the hose by a flow rate sensor. The gas-type inspection method according to claim 4 or 5, wherein the resin member is made of polybutylene terephthalate.