US-12624781-B2 - Hose joint

US12624781B2US 12624781 B2US12624781 B2US 12624781B2US-12624781-B2

Abstract

The hose joint includes: a nipple having conductivity and provided along an insertion space of the hose body; a sleeve deformable in a radial direction and provided so as to surround an outer circumference of the insertion space of the hose body formed along an outer peripheral surface of the nipple; a plurality of separated holders provided outside of the sleeve to cover an outer face of the sleeve in a circumferential direction and be separable in the radial direction; and a tightening member provided to extend across the plurality of separated holders so as to move the individual separated holders closer together in the radial direction and cause diameter reduction of the sleeve. The nipple having the conductivity has a grounding clip having conductivity, the grounding clip is locked to an outer circumference of the nipple, each of the separated holders having a holder extension part.

Inventors

Shuji SUGITA
Kazuki Shimizu

Assignees

TOYOX CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20230703
Priority Date: 20220715

Claims (6)

1 . A hose joint for connection of a hose body having electrical conductivity at an outer circumference or a local region of an outer peripheral surface thereof, the hose joint comprising: a nipple having electrical conductivity and provided along an insertion space of the hose body; a sleeve deformable in a radial direction and provided so as to surround an outer circumference of the insertion space of the hose body formed along an outer peripheral surface of the nipple; a plurality of separated holders provided outside of the sleeve to cover an outer face of the sleeve in a circumferential direction and be separable in the radial direction; and a tightening member provided to extend across the plurality of separated holders so as to move the individual separated holders closer together in the radial direction and cause diameter reduction of the sleeve, the nipple having a grounding clip having electrical conductivity, the grounding clip being locked to an outer circumference of the nipple, each of the separated holders having a holder extension part extending longer than a length of the sleeve in a hose insertion direction, the holder extension part pressing the grounding clip against the hose body as the tightening member moves the plurality of separated holders closer together.
2 . The hose joint according to claim 1 , wherein the grounding clip has elasticity.
3 . The hose joint according to claim 2 , wherein the grounding clip is configured to include a substantially U-shaped part that allows movement along the hose insertion direction, a convex part that abuts on a conductive part of the hose body, and an abutting part that comes into contact with the holder extension part.
4 . The hose joint according to claim 3 , wherein the grounding clip is movable along the hose insertion direction prior to the holder extension part pressing the grounding clip against the hose body.
5 . The hose joint according to claim 2 , wherein the grounding clip is movable along the hose insertion direction prior to the holder extension part pressing the grounding clip against the hose body.
6 . The hose joint according to claim 1 , wherein the grounding clip is movable along the hose insertion direction prior to the holder extension part pressing the grounding clip against the hose body.

Description

TECHNICAL FIELD The present invention relates to a hose connection structure to be used to dissipate static electricity generated in a hose body, such as a hose or tube, by fluids, granules, or powders passing through the inside thereof or by friction between the outside thereof and an object. BACKGROUND ART Conventionally, as a hose connection structure subjected to antistatic-electricity measures, there is a hose connection structure in which, to a hose body having a flat outer surface and having a strip containing conductive carbon mixed therein and integrally fixed to the hose body over an entire length in an axial direction thereof, a cap nut joint using a electrically conductive material (sleeve) is assembled to allow grounding connection and simultaneously prevent a hose from coming off and leakage therefrom (PTL 1). Meanwhile, there is a hose connection structure which uses a dedicated grounding clip to achieve grounding connection of a particularly large-sized hose body including a strip containing conductive carbon mixed therein in an axial direction and including a reinforced member provided along an outer surface to spirally protrude (PTL 2). CITATION LIST Patent Literature PTL 1: Japanese Patent Application Publication No. 2013-36503PTL 2: Japanese Patent Application Publication No. 2021-99138 SUMMARY OF INVENTION Technical Problem to Be Solved by Invention The hose connection structure described in PTL 1 which simultaneously allows the joint to be assembled thereto and allows the grounding connection has excellent workability, but this is limited to a case where a hose diameter is relatively small. In other words, when the hose diameter increases, tightening of the cap nut requires a force, and a tool in use is also increased in size to impair the workability. In addition, when the joint is decomposed, the sleeve is deformed or worn out in most cases, which leads to incomplete grounding connection when the joint is reused. When provided with a clamp-type joint, the hose connection structure described in PTL 2 can be used even when the hose diameter is large, but lacks workability in that assembly of the joint and the grounding connection processing need to be separately performed. The present invention aims at coping with such a problem, and an object thereof is to provide an easy-to-use hose joint that can use a hose body of any size and any type and can be assembled, while simultaneously allowing grounding connection. Solution to Problem To attain the object, the present invention is a hose joint for connection of a hose body having electrical conductivity at an outer circumference or a local region of an outer peripheral surface thereof, the hose joint including: a nipple having electrical conductivity and provided along an insertion space of the hose body; a sleeve deformable in a radial direction and provided so as to surround an outer circumference of the insertion space of the hose body formed along an outer peripheral surface of the nipple; a plurality of separated holders provided outside of the sleeve to cover an outer face of the sleeve in a circumferential direction and be separable in the radial direction; and a tightening member provided to extend across the plurality of separated holders so as to move the individual separated holders closer together in the radial direction and cause diameter reduction of the sleeve, the nipple having the electrical conductivity having a grounding clip having electrical conductivity, the grounding clip being locked to an outer circumference of the nipple, each of the separated holders having a holder extension part extending longer than a length of the sleeve in a hose insertion direction, the holder extension part pressing the grounding clip against the hose body as the tightening member moves the plurality of separated holders closer together. Advantageous Effects of Invention According to the present invention having the features described above, it is possible to provide a hose joint that can be used for a hose body of any size and any type and can be assembled, while simultaneously allowing grounding connection. BRIEF DESCRIPTION OF DRAWINGS FIGS. 1(a)-1(f) are illustrative views illustrating an overall configuration of a hose joint according to an embodiment of the present invention, in which FIG. 1(a) is a front view, FIG. 1(b) is a top view, FIG. 1(c) is a left side view, FIG. 1(d) is an upper left perspective view, FIG. 1(e) is a side cross-sectional view of a sleeve, which is a component of the hose joint, and FIG. 1(f) is a perspective view of the sleeve. FIGS. 2(a)-2(c) are illustrative views illustrating the overall configuration of the hose joint according to the embodiment of the present invention, in which FIG. 2(a) is an exploded perspective view, FIG. 2(b) is an appearance perspective view after assembly, and FIG. 2(c) is an enlarged view of a portion G in FIG. 2(a). FIGS. 3(a)-3(f) include side cross-sectional views in FIGS. 3(