JP5326072B2 - Antistatic flexible tube and discharge joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent a part of a given spot from being separated while maintaining a function easily groundable at any spot of a hose. <P>SOLUTION: Layers formed of a conductive material as a grounding conductive member 3 are laminated so as to be exposed along a reinforcement wire 2. In this way, grounding is allowed in any part of the layer of the exposed grounding conductive member 3. The layer formed of a conductive material of the grounding conductive member 3 is hardly cut unlike a wire rod so that the layer is free from any breakage of a part thereof even though a worker comes into contact therewith. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

The present invention relates to an antistatic flexible tube for preventing static electricity generated by friction with fluid or powder passing through the inside or an external object, and a discharge joint for releasing static electricity therefrom.
More specifically, the present invention relates to an antistatic flexible tube including a tube main body, a reinforcing wire spirally wound along the outer peripheral surface of the tube main body, and a grounding conductive member.

  Conventionally, as a flexible tube for preventing static electricity of this type, a resin hose body, a resin reinforcing wire wound spirally around the outer surface of the hose body and integrated with the outer surface of the hose body, and a reinforcing wire The ground wire provided on the outer peripheral surface of the hose body across There is one in which the exposed ground wire can be easily grounded by leaving the ground wire exposed on the outer peripheral surface of the hose body (see, for example, Patent Document 1).

JP 2000-65257 A (page 2-4, FIGS. 1-4)

However, in such a conventional antistatic flexible tube, since the ground wire made of a metal wire or conductive fiber is exposed on the outer peripheral surface of the hose body, the ground wire is a wire. If the worker or the like comes into contact with it easily, the part may be broken and separated, and a part of the separated ground wire falls as it is or floats in the air.
As a result, some of the rarely separated ground wire may be mixed into other products such as products currently being manufactured, so it is possible to deal with contamination of products such as food factories and pharmaceutical factories. In a harsh industry, it was difficult to use a ground wire exposed on the outer peripheral surface of the hose body, making it difficult to prevent static electricity.

First invention of the present invention, be intended to prevent damage to the ground conductive member by ground conductive member is easily ground can function to maintain quality one contact touch friction in any position of the hose It is.
The third aspect of the invention is intended to easily and surely connect the antistatic flexible tube to the ground.

In order to achieve the above-described object, a first invention of the present invention is a static electricity comprising a tube body, a reinforcing wire spirally wound along the outer peripheral surface of the tube body, and a grounding conductive member. A flexible tube for prevention, wherein a belt-like layer made of a conductive material is sandwiched between the outer peripheral surface of the tube main body and the reinforcing wire as the grounding conductive portion, and one end of the belt-like layer is inserted into the reinforcing wire. Projecting from one end edge of the tube, and laminated so as to be spirally exposed along the outer peripheral surface of the tube main body disposed in a concave shape between the reinforcing wires, on the outer peripheral surface of the transparent tube main body A spiral transparent window is opened.
The second invention is to provide a discharge joint coupled to the first inventions antistatic flexible tube to form a helical groove that engages the reinforcing wire member at one end opening The conductive material grounded from the opening at the other end is inserted, and the inner peripheral surface of the opening at the one end facing the conductive member for grounding is electrically connected to the conductor at the one end opening. The inner peripheral surface and the inner peripheral surface of the other end opening are formed of a conductive material.

First invention of the present invention, by laminating formed to expose a strip layer made of a conductive material as grounding conductive member along the reinforcing wire member, anywhere strip layer of the exposed ground conductive member Unlike the wire rod, the belt-like layer made of the conductive material of the ground conductive member can be grounded and is not easily broken, and there is no possibility that a part of the belt layer is damaged even if an operator or the like comes into contact.
Accordingly, it is possible to reliably prevent a part of the grounding conductive member from being broken and separated while maintaining the function of allowing the grounding conductive member to be easily grounded at an arbitrary position of the hose.
As a result, there is no risk that a part of the ground wire made of a metal wire or conductive fiber will be separated and mixed into the product, such as food or medicine, compared to the conventional wire that is exposed on the outer peripheral surface of the hose body. In particular, it can be used even in industries where the handling of foreign matters in products such as food factories and pharmaceutical factories is severe, and sufficient antistatic measures can be taken.
In addition, a reinforcing wire rod is formed by laminating a belt-like layer made of a conductive material as a grounding conductive member on the outer peripheral surface of the tube main body along the outer peripheral surface of the tube main body disposed in a concave shape between the reinforcing wire rods. Since the belt-like layer made of the conductive resin of the conductive member for grounding is arranged between them, even if the pipe is slid to the ground etc., it is only the reinforcing wire that comes into contact with it. The belt-like layer made of the conductive resin of the conductive member is not damaged and separated by friction.
Accordingly, it is possible to prevent damage to the grounding conductive member due to contact friction.
As a result, it is possible to reliably release static electricity regardless of how the tube is used.

According to a third aspect of the present invention, a spiral concave groove that engages with a reinforcing wire is formed at one end opening of a discharge joint connected to the flexible pipe for preventing static electricity according to the first aspect or the second aspect, A conductor grounded from the other end opening is inserted, and the inner peripheral surface of the one end opening and the other end opening are electrically connected to the inner peripheral surface facing the grounding conductive member and the conductor. Is formed of a conductive material, and static electricity generated in the flexible pipe for preventing static electricity is discharged from the ground conductive member through the discharge joint.
Accordingly, the static electricity preventing flexible tube can be easily and reliably grounded.

  The embodiment of the static electricity preventing flexible tube A according to the present invention includes a tube main body 1, a reinforcing wire 2 wound spirally along the outer peripheral surface 1a of the tube main body 1, and a conductive member 3 for grounding. In addition, a layer made of a conductive material is laminated as the ground conductive member 3 so as to be exposed along the reinforcing wire 2.

The tube body 1 is formed in a cylindrical shape that can be elastically deformed with a transparent or translucent soft material such as a soft synthetic resin or rubber, or a colored soft material.
The reinforcing wire 2 is formed in a linear shape using a transparent or translucent hard material such as a synthetic resin or a colored hard material.
By integrating the tube body 1 and the reinforcing wire 2, a spiral reinforcing tube such as a spiral reinforcing hose or a spiral reinforcing tube in which the reinforcing wire 2 protrudes spirally from the outer peripheral surface 1 a of the tube body 1 is formed.

  As a manufacturing method of this spiral reinforcing pipe, a manufacturing apparatus as described in Japanese Patent No. 2858691 is used, and the outer surface of the spiral shaft that is cantilevered and driven to rotate is continuously applied from the first extruder. The uncured strips to be extruded are welded to each other while being wound in the hose axial direction so that a part thereof overlaps, and a spirally wound tube (tube body 1) is continuously formed. A hard wire continuously extruded from the second extruder is spirally wound in the hose axial direction along the outer peripheral surface 1a of the tube, so that the reinforcing wire 2 is protruded and welded to the tube body 1. .

  Furthermore, as another manufacturing method, for example, a manufacturing apparatus as disclosed in Japanese Patent Publication No. 59-19811 is used, and the outer surface of the spiral shaft is not continuously extruded while being integrated from one extruder. A spirally wound tube (tube body 1) is continuously formed by welding a cured soft strip and a hard wire to each other while being wound in the hose axial direction so that a part of the soft strip overlaps. At the same time, the reinforcing wire 2 can be protruded and formed in a spiral shape.

  Instead of such a spirally wound tube, a hard wire continuously extruded from the extruder is spiraled in the hose axial direction along the outer peripheral surface 1a of the tube body 1 extruded from an extruder having a conventionally known structure. It is also possible to project the reinforcing wire 2 by being welded to each other while being wound in a shape.

  As the conductive material of the grounding conductive member 3, a conductive resin, conductive rubber, or the like is used by being formed into a sheet shape or a film shape, and is laminated so as to be exposed along the reinforcing wire 2. They are laminated on the outer peripheral surface 1 a of the tube body 1 so as to be in a spiral shape parallel to the reinforcing wire 2 or laminated on the outer surface of the reinforcing wire 2.

And it is preferable to electrically connect, for example, a discharge joint B to the static electricity preventing flexible tube A having such a structure as means for releasing static electricity generated in the tube.
The discharge joint B is grounded, for example, by grounding it via a conductor C made of a conductive material such as a metal with respect to a manufacturing apparatus to which raw materials such as resin pellets, powder and granules are supplied. It is in the state.

The discharge joint B is formed in a cylindrical shape from an elastically deformable material such as soft synthetic resin or rubber, and at least one end opening B1 has a spiral groove that engages with the reinforcing wire 2. B2 is formed and connected by screwing in the above-described antistatic flexible tube A. In this connected state, at least the inner peripheral surface of the one end opening B1 that faces and contacts the grounding conductive member 3, and the ground Only the inner peripheral surface of the other end opening B3 facing and facing the formed conductor C is partially formed of a conductive material, or the entire discharge joint B is formed of a conductive material and electrically It is preferable to connect them.
Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 (a) and 1 (b), the first embodiment is provided between the outer peripheral surface 1a of the tube body 1 made of a transparent soft material and the spiral reinforcing wire 2 made of a transparent hard material. A belt-like layer made of a colored conductive soft material is sandwiched between the ground conductive member 3 and laminated so that the end portion 3a protrudes spirally along the edge of the reinforcing wire 2 in the hose axial direction. Thus, the outer peripheral surface 1a of the tube body 1 is partially covered over the entire circumference, and the discharge joint B is electrically conductive as the antistatic flexible tube A and the conductor C. The case where it is a cuff which connects a pipe is shown.

In the case of the illustrated example, the belt-like layer of the grounding conductive member 3 is laminated on the outer peripheral surface 1a of the tube body 1 so that only one end portion 3a protrudes from one end edge of the reinforcing wire 2 in the hose axial direction. By doing so, a spiral transparent window 1b is opened on the outer peripheral surface 1a of the transparent tube body 1.
As another example, by projecting both end portions 3a of the belt-like layer of the grounding conductive member 3 from both ends of the reinforcing wire 2 in the hose axial direction, between the end portions 3a of the adjacent grounding conductive members 3 respectively. It is also possible to make the spiral transparent window 1b open.

  As a manufacturing method of the static electricity prevention flexible tube A having such a structure, the outer peripheral surface of the spirally wound tube (tube body 1) continuously formed by the above-described manufacturing apparatus or the tube body 1 extruded from an extrusion molding machine. Along the la, the conductive material of the ground conductive member 3 and the hard material of the reinforcing wire 2 are spirally wound in an uncured state by coextrusion molding, or spiraled in an uncured state by individual extrusion molding As a result, the reinforcing wire 2 is formed in a projecting manner across the belt-like layer of the grounding conductive member 3.

  Further, as shown in FIGS. 1A and 1B, the cuff of the discharge joint B can be coaxially inserted with the antistatic flexible tube A and the conductive pipe C at both ends in the axial direction. It is formed in a substantially cylindrical shape, and a grounded conductive pipe C is inserted into the other end opening B3, and the grounding conductive member 3 of the antistatic flexible tube A is connected to the discharge joint B via the discharge joint B. The conductive pipe C is electrically connected.

  Further, in the illustrated example, the tip C1 of the conductive pipe C is placed along the inner peripheral surface 1c of the tube body 1 of the antistatic flexible tube A at the other end opening B3 of the discharge joint B. The conductive pipe C and the antistatic flexible tube A are connected to the vicinity of the one end opening B1 and, at the outer periphery of the one end opening B1 and the other end opening B3 of the discharge joint B, for example, a hose By attaching and tightening a fastening tool D such as a band, the one end opening B1 and the other end opening B3 are reduced in diameter to prevent the conductive pipe C and the antistatic flexible tube A from coming off. ing.

  As another example, it is also possible to insert the tip C1 of the conductive pipe C only in the other end opening B3 of the discharge joint B and prevent it from coming off by means other than the fastening tool D.

  The one end opening B1 of the discharge joint B is formed with a locking step B4 that opposes the distal end surface of the antistatic flexible tube A inserted therein, and is reinforced to the spiral groove B2. By connecting the distal end surface A1 of the antistatic flexible tube A screwed while engaging the wire 2 to the locking step B4, the connection is made more reliably.

Next, the effect of the static electricity preventing flexible tube A will be described.
First, since the end 3a of the belt-like layer of the grounding conductive member 3 is disposed so as to be spirally exposed over the entire circumference of the outer peripheral surface 1a of the tube main body 1, this strip-like layer of the grounded conductive member 3 is exposed. Since the layer made of the conductive material of the grounding conductive member 3 is integrally laminated on the outer peripheral surface 1a of the tube body 1, an operator or the like comes into contact therewith. However, there is no risk that some of them will be broken, separated and dropped.

Furthermore, since the end 3a of the belt-like layer of the conductive member 3 for earthing is disposed so as to be recessed between the reinforcing wire members 2, even if the static electricity preventing flexible tube A is slid on the ground or the like, it comes into contact therewith. Only the reinforcing wire 2 is used, and the layer made of the conductive resin of the grounding conductive member 3 is not damaged and separated by friction.
Thereby, damage to the grounding conductive member 3 due to contact friction can be prevented.

  Further, when the layer of the grounding conductive member 3 is formed of a conductive resin, even if the layer made of the conductive resin is thin, it has excellent conductivity efficiency. Static electricity generated by friction with the powder or an external object is discharged to the grounded conductive pipe C through the end portion 3a of the belt-like layer of the grounding conductive member 3 and the discharge joint B.

  As a result, it is possible to prevent inconveniences caused by charging of the antistatic flexible tube A, for example, adhesion of raw materials such as resin pellets, powders and granules, explosions or fires.

  In Example 2, as shown in FIGS. 2A and 2B, a strip-shaped layer made of a colored conductive soft material is used as the ground conductive member 3 on the outer peripheral surface 1a of the transparent tube body 1. The configuration in which the layers are spirally laminated along the transparent reinforcing wire 2 is different from the first embodiment shown in FIG. 1, and the other configurations are the same as those in the first embodiment shown in FIG.

  In the case of the illustrated example, the outer peripheral surface of the transparent tube main body 1 is obtained by bringing one end edge of the belt-like layer of the grounding conductive member 3 into contact with or approaching one side surface 2a of the reinforcing wire 2 in the hose axial direction. A spiral transparent window 1b is opened in 1a and the reinforcing wire 2.

  Therefore, the second embodiment shown in FIG. 2 can also obtain the same effects as those of the first embodiment described above, and in addition, between the outer peripheral surface 1a of the tube body 1 and the reinforcing wire 2 for grounding. Since it is not necessary to sandwich the belt-like layer of the conductive member 3, it is easier to mold than Example 1, and not only the outer peripheral surface 1a of the transparent tube body 1 but also the reinforcing wire 2 can be used as the transparent window 1b. There is an advantage that the raw material passing through the inside of the static electricity preventing flexible tube A is easy to see from the outside.

  In the third embodiment, as shown in FIG. 3, the configuration in which the belt-like layer of the ground conductive member 3 is laminated along only the outer surface of the reinforcing wire 2 is the same as that of the first embodiment shown in FIG. The other configurations are the same as those of the first embodiment shown in FIG.

  In the case of the illustrated example, a side coating layer is formed on both side surfaces 2b excluding the contact surface with the outer peripheral surface 1a of the tube body 1 and the outer front end surface 2c of the reinforcing wire 2 with a conductive soft material of the ground conductive member 3. By laminating 3b and the outer covering layer 3c and covering them with a substantially U-shaped cross section or a substantially U-shaped cross section, a spiral transparent window 1b is opened on the entire outer peripheral surface 1a of the transparent tube body 1.

  Therefore, in the third embodiment shown in FIG. 3, the outer covering layer 3c of the grounding conductive member 3 is disposed on the outer front end surface 2c of the reinforcing wire 2, so that the antistatic flexible tube A is slid on the ground or the like. Although the belt-like layer of the grounding conductive member 3 may be cut by the contact friction, the side coating layer 3b laminated on the both side surfaces 2b of the reinforcing wire 2 remains, so the above paragraph number Except for the function and effect described in [0026], the same function and effect as those of the first embodiment described above can be obtained.

  In the fourth embodiment, as shown in FIG. 4, the configuration in which the belt-like layer of the grounding conductive member 3 is laminated only along the outer front end surface 2c of the reinforcing wire 2 is the embodiment shown in FIG. Unlike the first embodiment, the other configuration is the same as that of the first embodiment shown in FIG.

In the case of the illustrated example, the outer covering layer 3 c is laminated on the outer front end surface 2 c of the reinforcing wire 2 with the conductive soft material of the ground conductive member 3.
As another example, a concave portion (not shown) is formed on the outer front end surface 2c of the reinforcing wire 2, and the outer covering layer 3c is laminated and formed in this concave portion with the conductive soft material of the ground conductive member 3. Is possible

  Therefore, in the example 4 shown in FIG. 4, in the illustrated example, the outer covering layer 3c of the grounding conductive member 3 is disposed on the outer front end surface 2c of the reinforcing wire 2, so that the antistatic flexible tube A is provided. Although there is a possibility that the belt-like layer of the grounding conductive member 3 is cut by the contact friction when it is slid on the ground or the like, the grounding conductive member is in the recess formed in the outer front end surface 2c of the reinforcing wire 2. If the outer covering layer 3c of 3 is laminated, the outer covering layer 3c in the recess remains even if the outer end surface 2c of the reinforcing wire 2 is rubbed. Therefore, the function and effect described in paragraph [0026] above are excluded. Thus, the same effects as those of the first embodiment described above can be obtained.

In the previous embodiment, the discharge joint B is a cuff for connecting a conductive pipe as a grounded conductor C and a flexible pipe A for preventing static electricity. However, the present invention is not limited to this. Instead, the static electricity generated in the antistatic flexible tube A may be discharged by using a discharge joint B other than the cuff mentioned above.
Furthermore, the reinforcing wire 2 made of a transparent hard material is spirally wound and integrated along the outer peripheral surface 1a of the tube main body 1 made of a transparent soft material. A colored reinforcing wire 2 is spirally wound along the outer peripheral surface 1a of the tube, or a transparent, translucent or colored reinforcing wire 2 is spirally wound along the outer peripheral surface 1a of the tube body 1 made of a colored soft material. May be integrated.

It is a partially notched front view which shows Example 1 of the flexible tube for static electricity prevention of this invention, (a) has shown the decomposition | disassembly state, (b) has shown the connection state. It is a partially notched front view which shows Example 2 of the flexible tube for static electricity prevention of this invention, (a) has shown the decomposition | disassembly state, (b) has shown the connection state. It is a partially notched front view which shows Example 3 of the flexible tube for static electricity prevention of this invention, and has shown only the connection state. It is a partial longitudinal section front view showing. It is a partially notched front view which shows Example 4 of the flexible tube for static electricity prevention of this invention, and has shown only the connection state.

Explanation of symbols

A Static electricity prevention flexible tube A1 Tip surface 1 Tube body 1a Outer surface 1b Transparent window 1c Inner surface 2 Reinforcing wire 2a One side surface 2b Both side surfaces 2c Outer tip surface 3 Grounding conductive member 3a End portion 3b Side coating layer 3c Outer coating layer B Discharge joint (cuff) B1 Opening B2 Spiral concave groove B3 Other end opening B4 Locking step C Conductor (conductive pipe)
C1 Tip D Fastening tool

Claims (2)

An antistatic flexible tube comprising a tube body, a reinforcing wire spirally wound along the outer peripheral surface of the tube body, and a grounding conductive member,
A band-like layer ing a conductive material as the ground conductive portion, sandwiched between the outer peripheral surface and the reinforcing wire of the tube body, so as to protrude one end portion of the belt-shaped layer from one edge of the reinforcing wire member And laminated so as to be spirally exposed along the outer peripheral surface of the tube main body disposed in a concave shape between the reinforcing wire members, and a transparent transparent window is formed on the outer peripheral surface of the transparent tube main body. A flexible tube for preventing static electricity.
A discharge joint being connected to the antistatic flexible tube of claim 1 Symbol placement, to form a helical groove that engages the reinforcing wire member at one end opening, the other end opening The grounded conductor is inserted and the inner peripheral surface of the one end opening and the inner peripheral surface of the one end opening and the inner peripheral surface of the one end opening facing the conductive member for grounding are electrically connected. A discharge joint, wherein the inner peripheral surface of the other end opening is formed of a conductive material.

Images