Hose nipple

Abstract

To provide a hose nipple capable of detecting detachment of a hose.SOLUTION: In a hose nipple, gas is circulated inside a tubular mounting part inserted in a hose. The mounting part has a cutout part communicated from inside to outside of the mounting part, and generating sound in an audible region by circulating a part of the gas from inside to outside of the mounting part at a position covered with the hose when the mounting part is inserted in the hose.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a hose nipple. [Background technology]

[0002] Patent Document 1 discloses a sounder provided downstream of the valve chest of a relief valve. This sounder has an extended main body to form a chamber connected to the valve chest, and a through-hole with a smaller diameter than the chamber is opened in the end wall. When rising pressure enters the chamber from the valve chest and passes through the reduced diameter through-hole, it generates a passing sound. This sounder can notify the driver of a constricted state of the freezer tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 61-197709 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, vehicles that run on public roads are equipped with a blow-by hose that returns gas (blow-by gas) that leaks from the combustion chamber into the crankcase to the intake pipe. If the blow-by hose comes off from the hose nipple to which it is connected, the blow-by gas will be released into the atmosphere, which is undesirable from the viewpoint of environmental conservation.

[0005] In view of the above circumstances, an object of at least one embodiment of the present invention is to provide a hose nipple that can notify the user that a hose has come loose. [Means for solving the problem]

[0006] (1) A hose nipple according to at least one embodiment of the present invention is a hose nipple in which gas flows through the inside of a tubular attachment part that is inserted into a hose, and the attachment part has a notch at a position that is covered by the hose when the attachment part is inserted into the hose, the notch communicating from the inside of the attachment part to the outside, and causing a portion of the gas flowing through the attachment part to flow from the inside of the attachment part to the outside, thereby producing sound in the audible range.

[0007] According to the above configuration (1), when the hose comes off the hose nipple, the notch that was covered by the hose becomes visible, and a part of the gas flowing inside the attachment part flows from the inside to the outside of the attachment part, generating an audible sound. This allows the hose nipple to notify the user that the hose has come off.

[0008] (2) In some embodiments, in the configuration of (1) above, protrusions are provided that protrude from the inner wall surface of the mounting portion so that reflective surfaces that intersect with the flow direction of the gas are formed between the tip of the mounting portion and the notch, and between the base end of the mounting portion and the notch.

[0009] According to the above configuration (2), sounds in the audible range can be amplified by vibration resonance of the gas flowing inside the wearing part.

[0010] (3) In some embodiments, in the configuration of (1) or (2) above, the length L from the tip of the mounting portion to the notch is longer than the inner diameter D of the mounting portion.

[0011] According to the above configuration (3), it is possible to generate a sound with a higher frequency than the engine sound when the engine is idling.

[0012] (4) In some embodiments, in the configuration of (1) or (2) above, the mounting portion has a partition between the notch and the inner wall of the mounting portion facing the notch, and the length L from the tip of the mounting portion to the notch is longer than the height H from the partition to the notch.

[0013] According to the above configuration (4), it is possible to generate a sound with a higher frequency than the engine sound when the engine is idling.

[0014] (5) In some embodiments, in the configuration of (1) or (2) above, the hose is a blow-by hose that returns blow-by gas from the crankcase to the intake pipe.

[0015] According to the above configuration (5), it is possible to notify the user that the blow-by hose has come loose. [Effects of the Invention]

[0016] According to at least one embodiment of the present invention, it is possible to notify the user that a hose has come loose. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a longitudinal sectional view schematically showing a hose nipple according to a first embodiment. [Figure 2] 2 is a vertical cross-sectional view showing a state in which a hose is attached to an attachment portion of the hose nipple shown in FIG. 1. FIG. [Figure 3] 5A and 5B are diagrams schematically showing a hose nipple according to a second embodiment, in which (a) is a longitudinal cross-sectional view, and (b) is a cross-sectional view taken along line BB shown in (a). [Figure 4] FIG. 2 is a diagram showing a blow-by hose and a hose nipple to which the blow-by hose is connected. [Figure 5] 3 is a diagram schematically showing an example of a method for manufacturing the hose nipple according to the first embodiment. FIG. [Figure 6] 10 is a diagram schematically illustrating an example of a method for manufacturing a hose nipple according to a second embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0019] [Embodiment 1] [Hose nipple configuration] FIG. 1 is a vertical cross-sectional view schematically showing a hose nipple according to a first embodiment, and FIG. 2 is a vertical cross-sectional view showing a state in which a hose is attached to an attachment portion of the hose nipple shown in FIG.

[0020] 1 and 2, the hose nipple 1 according to the first embodiment is a hose nipple having a tubular attachment portion 11 to be inserted into a hose 2, and through which gas flows inside the attachment portion 11. The hose nipple 1 shown in FIGS. 1 and 2 is a hose nipple through which gas flows (outflows) from the hose nipple 1 to the hose 2, but the hose nipple 1 according to the first embodiment is not limited to this and may be a hose nipple through which gas flows (inflows) from the hose 2 to the hose nipple 1. The attachment portion 11 is, for example, cylindrical, but is not limited to this and may have an elliptical or rectangular cross section.

[0021] The attachment part 11 has a notch 12 at a position that is covered by the hose 2 when the attachment part 11 is inserted into the hose 2, the notch 12 communicating from the inside to the outside of the attachment part 11 and causing sound in the audible range by allowing a portion of the gas flowing inside the attachment part 11 to flow from the inside to the outside of the attachment part 11. The notch 12 is provided with a tongue 13 that is inclined with respect to the flow direction of the gas flowing inside the attachment part 11, but the tongue 13 is not essential.

[0022] As shown in FIG. 1, the length L from the tip 11a of the mounting portion 11 to the notch 12 is L=2(n-1)λ / 4 or L=nλ / 2, where λ is the wavelength of the gas flowing inside the mounting portion 11 and n is a natural number.

[0023] Furthermore, the hose nipple 1 according to embodiment 1 has protrusions 16 and 17 that protrude from the inner wall surface of the mounting portion 11 so that reflective surfaces 14 and 15 that intersect with the gas flow direction are formed between the tip 11a of the mounting portion 11 (the tip of the hose nipple 1) and the notch 12, and between the base end 11b of the mounting portion 11 and the notch 12; however, the reflective surfaces 14 and 15 and the protrusions 16 and 17 are not essential.

[0024] In the hose nipple 1 according to the first embodiment, the length L from the tip 11a of the attachment portion 11 (the tip of the hose nipple 1) to the notch 12 is longer than the inner diameter D of the attachment portion 11.

[0025] [Hose nipple function] 2, a hose 2 having an inner diameter that is the same as or slightly smaller than the outer diameter of the attachment part 11 is connected to the hose nipple 1 according to the first embodiment, and the attachment part 11 of the hose nipple is inserted into the hose 2. As a result, the notch 12 provided in the attachment part 11 is covered by the hose 2, and a portion of the gas flowing inside the attachment part 11 does not flow from the inside to the outside of the attachment part 11. Therefore, the notch 12 covered by the hose 2 does not generate sound in the audible range.

[0026] The tip of the hose 2 connected to the hose nipple 1 in this manner is fixed by the hose clamp 3. In the first embodiment, the tip of the hose 2 is fixed to the hose nipple 1 by the hose clamp 3 at a position overlapping at least a part of the protrusion 16. In other words, the hose clamp 3 tightens the portion of the hose nipple 1 that is reinforced in the radial direction by the protrusion 16.

[0027] As shown in Fig. 1, when a hose 2 connected to a hose nipple 1 according to the first embodiment comes off the hose nipple 1, the attachment portion 11 of the hose nipple 1 is opened to the atmosphere, and a notch 12 provided in the attachment portion 11 appears. As a result, part of the gas flowing inside the attachment portion 11 flows from the inside to the outside of the attachment portion 11, causing the hose nipple 1 to generate a sound in the audible range. This allows the hose nipple 1 to notify that the hose has come off.

[0028] Furthermore, if the mounting portion 11 has protrusions 16, 17 that protrude from the inner wall surface so that reflective surfaces 14, 15 that intersect with the gas flow direction are formed between the tip 11a of the mounting portion 11 (the tip of the hose nipple 1) and the notch 12, and between the base end 11b of the mounting portion 11 and the notch 12, the sound in the audible range is amplified by the resonant vibration of the gas flowing through the mounting portion 11.

[0029] [Effect of hose nipples] According to the hose nipple 1 of embodiment 1, when the hose 2 comes out of the hose nipple 1, the notch 12 that was covered by the hose 2 appears, and a portion of the gas flowing inside the attachment part 11 flows from the inside to the outside of the attachment part 11, producing a sound in the audible range, so that the hose nipple can alert the user that the hose has come out.

[0030] When protrusions 16, 17 protruding from the inner wall surface of the mounting portion 11 are provided so that reflective surfaces 14, 15 that intersect with the gas flow direction are formed between the tip 11a of the mounting portion 11 (the tip of the hose nipple 1) and the notch 12, and between the base end 11b of the mounting portion 11 and the notch 12, the sound in the audible range can be amplified by vibration resonance of the gas flowing inside the mounting portion 11.

[0031] The length L from the tip 11a of the attachment portion 11 to the notch 12 is longer than the inner diameter D of the attachment portion 11, so it is possible to generate a sound with a higher frequency than the engine sound when the engine is idling. By generating a sound with a higher frequency than the engine sound when the engine is idling, it is possible to make the sound generated by the notch 12 of the hose nipple 1 easier to hear even when engine sound is being generated due to engine idling.

[0032] [Embodiment 2] [Hose nipple configuration] FIG. 3 is a diagram showing a hose nipple according to a second embodiment, in which (a) is a longitudinal cross-sectional view and (b) is a cross-sectional view taken along line BB shown in (a).

[0033] As shown in Fig. 3, the hose nipple 1B according to the second embodiment has a larger outer diameter than the hose nipple 1 according to the first embodiment. The hose nipple 1B according to the second embodiment has a partition wall 18 between the notch 12 and the inner wall of the attachment portion 11 facing the notch 12. The partition wall 18 extends from the tip 11a of the attachment portion 11 toward the base end of the attachment portion 11 beyond the notch 12. The tip 11a of the attachment portion 11 and the tip 18a of the partition wall 18 are closed by a lid 19.

[0034] In the hose nipple 1B according to the second embodiment, the length L from the tip 11a of the attachment portion 11 to the notch 12 is longer than the height H from the partition wall 18 to the notch.

[0035] Other configurations of the hose nipple 1B according to the second embodiment are the same as those of the hose nipple 1 according to the first embodiment.

[0036] [Hose nipple function] Even though the hose nipple 1B of embodiment 2 has a larger outer diameter than the hose nipple 1 of embodiment 1, some of the gas flowing inside the attachment portion 11 flows from the inside to the outside of the attachment portion 11, causing the hose nipple 1B to produce sound in the audible range.

[0037] [Effect of hose nipples] According to the hose nipple 1B of embodiment 2, even if the hose nipple 1B of embodiment 2 has a larger outer diameter than the hose nipple 1 of embodiment 1, the hose nipple 1B produces a sound in the audible range, so the hose nipple 1B can alert the user to the hose coming loose.

[0038] [Hose nipple with blow-by hose connected] FIG. 4 is a diagram showing a blow-by hose 2C and hose nipples 1C and 1D to which the blow-by hose 2C is connected.

[0039] The blow-by hose 2C is a hose that returns combustion gas (exhaust) and unburned mixture (blow-by gas) that have leaked from the engine's combustion chamber into the crankcase to the intake pipe. One end of the blow-by hose 2C is connected to a hose nipple 1C installed in a passage (cylinder head) that connects the crankcase to the cylinder head, and the other end of the blow-by hose 2C is connected to a hose nipple 1D installed in the intake pipe.

[0040] Hose nipple 1C installed on the cylinder head is a hose nipple through which blow-by gas (gas) flows (flows out) from hose nipple 1C to blow-by hose 2C, and hose nipple 1D installed on the intake pipe is a hose nipple through which blow-by gas (gas) flows (flows in) from blow-by hose 2C to hose nipple 1D.

[0041] When the blow-by hose 2C comes loose from the hose nipple 1C installed on the cylinder head, the mounting portion 11 of the hose nipple 1C is opened to the atmosphere, revealing the notch 12 provided in the mounting portion 11. As a result, part of the blow-by gas flowing out from the hose nipple 1C flows from the inside to the outside of the mounting portion 11, causing the hose nipple 1C to produce a sound in the audible range. This allows the hose nipple 1C to notify the user that the blow-by hose 2C has come loose.

[0042] When the blow-by hose 2C comes loose from the hose nipple 1D installed in the intake pipe, the mounting portion 11 of the hose nipple 1D is opened to the atmosphere, revealing the notch 12 provided in the mounting portion 11. Air flows into the hose nipple 1D that is open to the atmosphere due to the intake pressure of the engine, and some of the air flows from the inside of the mounting portion 11 to the outside, causing the hose nipple 1D to produce audible sound. This allows the hose nipple 1D to notify the user that the blow-by hose 2C has come loose.

[0043] [Example of manufacturing method of hose nipple according to embodiment 1] FIG. 5 is a diagram schematically illustrating an example of a manufacturing method for the hose nipple 1 according to the first embodiment. As shown in FIG. 5, the manufacturing method for the hose nipple 1 according to the first embodiment includes a step of providing protrusions 16, 17 that protrude relative to the inner wall surface of the circular pipe CT (FIG. 5(b)), and a step of providing a notch 12 in the circular pipe CT (FIG. 5(c)). In the step of providing the protrusions 16, 17 that protrude relative to the inner wall surface of the circular pipe CT, a pair of protrusions 16, 17 that protrude relative to the inner wall surface of the circular pipe CT are provided at a portion of the circular pipe CT that will become the attachment portion 11 to be inserted into the hose 2, with a gap in the extension direction of the circular pipe CT so as to form reflective surfaces 14, 15 that intersect with the extension direction of the circular pipe CT. In the step of providing the notches in the circular pipe CT, a notch 12 that communicates from the outside to the inside of the portion that will become the attachment portion 11 is provided between the pair of protrusions 16, 17.

[0044] According to the manufacturing method of the hose nipple 1 according to the first embodiment described above, the hose nipple 1 can be easily manufactured using the circular pipe CT as a material.

[0045] [Example of manufacturing method of hose nipple according to embodiment 2] FIG. 6 is a diagram schematically illustrating an example of a manufacturing method of a hose nipple 1B according to the second embodiment. As shown in FIG. 6, the manufacturing method of the hose nipple 1B according to the second embodiment includes a step of cutting the circular pipe CT in the radial direction while leaving a portion of the circular pipe CT (FIG. 6(a)), a step of folding back the portion (FIG. 6(b)), and a step of making a notch 12 in the circular pipe CT (FIG. 6(c)). In the step of cutting the circular pipe CT in the radial direction while leaving a portion of the circular pipe CT, the circular pipe CT is cut in the radial direction toward the tip side of the portion of the circular pipe CT that will become the attachment portion 11 that is inserted into the hose 2. In the step of folding back the portion, the portion (the portion that will become the partition wall 18) is folded back in the direction opposite to the extending direction of the circular pipe CT. In the step of making the notch 12 in the circular pipe CT, the notch 12 is made in the portion that will become the attachment portion 11 at a position that overlaps the portion. The notch 12 communicates from the outside to the inside of the portion that will become the attachment portion 11, and generates sound in the audible range when a portion of gas flows from the inside of the portion that will become the attachment portion 11 to the outside.

[0046] According to the manufacturing method of the hose nipple 1B according to the second embodiment described above, the hose nipple 1B can be easily manufactured using the circular pipe CT as a material.

[0047] The present invention is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications. [Explanation of symbols]

[0048] 1,1B hose nipple 11 Mounting part 12 Cut 13 Tongue piece 14,15 Reflective surface 16,17 protrusion 18 Bulkhead 19 Lid 2 hoses 2C Blow-by Hose 3 hose clamps CT circular tube

Claims

1. A hose nipple in which gas flows through the inside of a tubular attachment portion that is inserted into a hose, The attachment portion is a hose nipple having a notch at a position that is covered by the hose when the attachment portion is inserted into the hose, the notch communicating from the inside to the outside of the attachment portion and causing a portion of the gas flowing through the attachment portion to flow from the inside to the outside of the attachment portion, thereby producing sound in the audible range.

2. 2. The hose nipple according to claim 1, further comprising a protrusion that protrudes from an inner wall surface of the mounting portion so as to form a reflective surface that intersects with the gas flow direction between the tip end of the mounting portion and the notch, and between the base end of the mounting portion and the notch.

3. 3. The hose nipple according to claim 1, wherein a length L from the tip of the attachment portion to the notch is longer than an inner diameter D of the attachment portion.

4. the mounting portion has a partition between the notch and an inner wall of the mounting portion facing the notch, 3. The hose nipple according to claim 1, wherein a length L from the tip of the attachment portion to the notch is longer than a height H from the partition wall to the notch.

5. 3. The hose nipple according to claim 1, wherein the hose is a blow-by hose for returning blow-by gas from a crankcase to an intake pipe.

Images