JP2002005372A - Hose connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose connecting structure capable of easily mounting a grounding member in a short time. SOLUTION: This structure is characterized by fitting a hose H exposing a conductive wire 3 to the surface of the hose H into a grounded metallic pipe 17, fitting a ring-shaped metallic grounding member 18 into a connecting part of the metallic pipe 17 and the hose H and bringing the grounding member 18 into contact with the metallic pipe 17 and the conductive wire 3 on the surface of the hose H.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hose connection structure for releasing static electricity generated in a hose.

[0002]

2. Description of the Related Art In a factory for producing resin products such as hoses, pellets as raw materials are sometimes conveyed by hoses. In this case, the pellets flow while contacting the inner peripheral surface of the hose, so that the friction generates static electricity, and the hoses and the pellets are charged. When the hose is charged as described above, dust may adhere to the hose or adversely affect peripheral devices. In addition, when the pellets are charged, the static electricity may cause the pellets to adhere to the inner peripheral surface of the hose, which may deteriorate the flow of the pellets. Furthermore, if the pellets attached to the hose remain as they are, different types of pellets may be mixed when another pellet is flowed later.

Further, depending on the working environment, there is a possibility that an explosion or a fire may occur due to static electricity of a hose or a pellet serving as an ignition source. The above-mentioned inconvenience occurs not only in the case of pellets but also in the case where a fluid, a powder, or a granular material flows through a hose.

In order to release static electricity generated in the hose, a hose connection structure shown in FIG. 6 has conventionally been provided.
A hose H for transporting pellets is fitted in a metal pipe 1 provided in the apparatus main body. The metal pipe 1 is grounded by grounding the device body.

As shown in FIG. 7, a conductive wire 3 is wound around a surface of a hose body 2 made of a soft resin, and a reinforcing member 4 made of a hard resin is provided outside the conductive wire 3 as shown in FIG. Is spirally wound. In such a hose H, the conductive wire 3 is fixed to the hose body 2 at a position where the conductive wire 3 overlaps with the reinforcing wire 4, and is exposed on the outer peripheral surface of the hose body 2 between the reinforcing wires 4.

After the hose H is inserted into the metal pipe 1, the hose H is firmly fixed to the metal pipe 1 by a metal fastening band 5 so as not to come off from the metal pipe 1. Further, when the hose H is fastened by the fastening band 5, the fastening band 5 comes into contact with the conductive wire 3 exposed on the surface of the hose H. A metal ground member 6 is brought into contact with the tightening band 5 and the metal pipe 1 respectively.
That is, the ground member 6 is originally formed as shown in FIG.
As shown in the figure, the band-shaped portion 7 has an L-shaped portion, a band portion 7, an insertion portion 8, and a connecting portion 9. An insertion hole 10 is formed in the band portion 7.

[0007] The earth member 6 as described above is shown in FIG.
As shown in FIG. 8B, the band 7 is bent, the insertion portion 8 is inserted into the insertion hole 10, and the inserted insertion portion 8 is folded back as shown in FIG. Do not get out of the hole 10. Then, the band member 7 attaches the ground member 6 to the metal pipe 1 so that they are brought into contact. On the other hand, as shown in FIG. 6, the connection 9 of the ground member 6 is
Insert between Then, the tightening band 5 is tightened, and the connecting portion 9 is brought into contact with the tightening band 5.

As described above, the conductive wire 3 exposed on the surface of the hose H and the metal pipe 1 are maintained in a state of being connected via the metal fastening band 5 and the metal grounding member 6. Dripping. Therefore, the static electricity generated in the hose H is transferred to the conductive wire 3 → the fastening band 5 → the grounding member 6 →
Discharge can be performed via the metal pipe 1 → the apparatus main body. That is, charging of the hose H and the pellets can be prevented.

[0009]

In the above-mentioned prior art, there is a problem that it takes time and effort to mount the grounding member 6, and the mounting workability is poor. That is, as described above, first, the band member 7 is wound around the metal pipe 1 and the insertion portion 8 is inserted into the insertion hole 10, as described above.
Turn the tip back. Next, the connecting portion 9 of the ground member 6
Is inserted between the tightening band 5 and the hose H. At that time, it is necessary to loosen the tightening band 5 once.
Then, the connecting portion 9 of the grounding portion 6 is tightened with the band 5.
After inserting between the hose and the hose H, the fastening band 5 is fastened to bring the connecting portion 9 into contact.

As described above, the mounting of the ground member 6 has a plurality of working steps, and the mounting work requires time and labor. Therefore, there is a problem that the workability of attaching the ground member 6 is poor. An object of the present invention is to provide a hose connection structure in which a ground member can be easily attached in a short time.

[0011]

According to a first aspect of the present invention, a hose having a conductive wire exposed on the surface of a hose is fitted into a grounded metal pipe, and a ring is formed at a connecting portion between the metal pipe and the hose. The metal ground member described above is fitted, and the ground member is brought into contact with the metal pipe and the conductive wire on the surface of the hose. In addition, the ring shape of the earth member is a concept including a C ring shape with a slit and a coil shape in which a wire member is spirally wound in addition to a completely ring shape. Yes, and the shape is not limited to a circle. In other words, the ring shape of the earth member means that when the earth member is fitted to the connecting portion between the metal pipe and the hose, the earth member does not easily come off from the metal pipe or the hose, and the metal pipe and the hose It is a structure that comes into contact with the conductive wire on the surface.

According to a second aspect, in the first aspect,
The ground member is formed in a coil shape. Third
According to a second aspect of the present invention, in the second aspect, the coil-shaped ground member has an inner diameter of the coil portion increased from the metal pipe side toward the hose side. 4th
According to the invention of the second or third aspect, the reinforcing member is spirally wound around the surface of the hose, and a coil-shaped ground member is screwed onto the surface of the hose.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 is, for example, used in a hose manufacturing apparatus. The structure of a hose H is the same as that of the above-mentioned conventional example. , And a detailed description thereof will be omitted. Trolley 1
Inside 1 is a pellet that is a raw material for a hose.
The truck 11 and the main body 12 of the manufacturing machine are connected by a hose H. The hose H is connected to a metal pipe 17 on the main body 12 of the manufacturing machine. When the manufacturing machine main body 12 is operated, the pellets in the carriage 11 are sucked by a known suction means, and the pellets are conveyed to the manufacturing machine main body 12 through the hose H. .

In the figure, reference numeral 13 denotes a hopper, and reference numeral 14 denotes a hopper.
Denotes a molding machine, reference numeral 15 denotes a mold, and reference numeral 16 denotes a base. All of these devices are made of a conductive material. Then, the metal pipe 17 is grounded by grounding the manufacturing machine main body 12 as described above.

FIG. 2 is an enlarged view of a connecting portion between the metal pipe 17 and the hose H. As shown in the figure, a metal ground member 18 is attached to the outer periphery of the metal pipe 17 and the hose H fitted in the metal pipe 17. As shown in FIG. 3, the grounding member 18 includes a coil portion 19 and knob portions 20, 20, and the inner diameter of the coil portion 19 decreases from the left side to the right side in the drawing. Then, the inner diameter a of the largest coil portion 19 is
The outer diameter of the hose body 2 is made slightly smaller, and the inner diameter b of the smallest coil portion 19 is made slightly smaller than the outer diameter of the metal pipe 17.

Further, as shown in FIG.
When the knobs 20, 20 are pinched, the inner diameter of the coil part is enlarged. However, when the knobs 20, 20 are released, the inner diameter returns to the original inner diameter by the elastic force.

Next, a method of attaching the ground member 6 will be described with reference to FIG. First, as shown in FIG. 5A, a ground member 18 is fitted in the metal pipe side 17 in advance. At this time, the ground member 18 is
The smaller inner diameter of 9 is located on the metal pipe 17 side. Next, as shown in FIG. 5B, a hose H is fitted into the metal pipe 17. After fitting the hose H into the metal pipe 17 in this manner, the user grips the knob of the ground member 18 and rotates the ground member 18 while expanding the diameter of the coil portion 19. The rotation direction of the ground member 18 is the same as the spiral direction of the reinforcing member 4 provided on the hose H.

When the earth member 18 is rotated as described above, the earth member 18 moves leftward in the drawing while being guided by the reinforcing member 4. That is, the ground member 18 is screwed to the hose H. Then, as shown in FIG. 5 (c), with the part of the ground member 18 kept in contact with the metal pipe 17, the knobs 20, 20 are released. When the knobs 20, 20 are released in this manner, the ground member 18 attempts to return to the original inner diameter by its elastic force, whereby the hose body 2 and the metal pipe 17 are tightened. When the hose body 2 and the metal pipe 17 are tightened by the coil 19 in this manner, the ground member 18 is kept in contact with both the conductive wire 3 of the hose H and the metal pipe 17.

Although the outer diameter of the hose body 2 differs from that of the metal pipe 17 by the thickness of the hose body 2, the inner diameter a of the coil portion 19 on the hose H side is larger than the inner diameter b on the metal pipe 17 side. Since it is large, the coil portion 19 can be firmly brought into contact with both the hose H and the metal pipe 17. By doing so, the conductive wire 3 of the hose H
Is electrically connected to the metal pipe 17 via the ground member 18. That is, the hose H is grounded. Therefore, even if static electricity is generated in the hose H, the generated static electricity is transferred from the conductive wire 3 to the ground member 1.
8 → metal pipe 17 → discharged through the manufacturing machine main body 12.

According to the above embodiment, the hose H can be grounded simply by pinching the knobs 20, 20 of the grounding member 18 and rotating the coil while increasing the diameter. Therefore, it is not necessary to wind the band portion around the metal pipe or insert the connecting portion between the hose and the tightening band as in the case of the above-mentioned conventional ground member, and the mounting operation can be simplified accordingly.

In the above embodiment, the coil portion 19 of the earth member 18 is rotated while its diameter is increased. However, the diameter of the coil portion 19 does not always have to be increased. That is,
Since the hose H has the spiral reinforcing member 4, the coil 1
The earth member 18 can be screwed into the hose H only by rotating the earth member 18 without expanding the diameter of the hose 9. In this embodiment, the ground member 18 is attached to the metal pipe 17 in advance, but the earth member 18 may be attached to the hose H in advance.

Further, in this embodiment, the hose H in which the reinforcing member 4 is spirally wound around the outer periphery is used.
As long as is exposed on the surface, it can be applied to a hose without the reinforcing member 4. However, the hose H having the reinforcing member 4 can restrict the movement of the earth member 18 once attached and can fix the conductive wire 3 to the surface of the hose, so that the earth member 18 is separated from the hose H or the metal pipe 17. It is possible to prevent the conductive wire 3 from falling off and from the ground member 18. If the ground member 18 is separated from the conductive wire 3 of the hose H or the metal pipe 17, the grounded state cannot be maintained. However, if the movement of the ground member 18 in the axial direction is regulated by the reinforcing member 4 as described above, such a disadvantage does not occur.

On the other hand, in this embodiment, although not shown, the hose fitted to the metal pipe is prevented from being pulled out by the tightening band. However, the ground member 1
With the tightening force of 8, it is possible to prevent the hose H from coming off. That is, when the force acting on the hose H in the detaching direction is small, the detachment of the hose can be sufficiently restricted by the tightening force of the ground member. Therefore, in this case, the tightening band can be omitted.

Further, in this embodiment, a coil-shaped ground member is used, but this ground member is not limited to a coil. For example, the ground member may be in the form of a metal ring. If the ring-shaped grounding member is fitted to the connecting portion between the hose and the metal pipe and the grounding member is brought into contact with the metal pipe and the conductive wire on the surface of the hose, the hose can be kept grounded.

Furthermore, if the earth member 18 can be kept in contact with both the conductive wire 3 and the metal pipe 17, the earth member 18 does not need to have elasticity. For example, a male screw is formed on the surface of the hose and the surface of the metal pipe, and a female screw is formed on the inner periphery of the ground member. Then, the hose H, the metal pipe 17 and the ground member may be brought into contact with the male screw and the female screw. In other words, the earth member has a ring shape,
Any material that contacts the surface of the hose H and the surface of the metal pipe 17 may be used.

[0026]

According to the first aspect of the present invention, a ring-shaped metal grounding member is fitted to a connecting portion between a metal pipe and a hose, and this grounding member is brought into contact with the conductive wire of the metal pipe and the hose. With this configuration, the mounting operation can be performed easily and in a short time. Therefore, the mounting workability can be improved as compared with the conventional example.

According to the second aspect of the present invention, since the grounding member is formed into a coil shape, the grounding member can be reliably brought into contact with both the metal pipe and the conductive wire of the hose by its elastic force. According to the third aspect, the inner diameter of the coiled ground member is increased from the metal pipe side toward the hose side, so that the ground member can be securely attached even when the hose is thick. it can. According to the fourth aspect, the reinforcing member is spirally wound around the hose surface, and the coiled ground member is screwed onto the hose surface, so that the ground member does not shift in the axial direction. Therefore, the ground member does not separate from the hose surface or the metal pipe.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a connection portion between a hose H and a metal pipe 17 of the present invention.

FIG. 3 is a front view and a side view of the ground member 18.

FIG. 4 is a front view of the ground member 18 and a knob 2;
It is a figure which shows the state which pinched 0 and 20 and expanded the coil part 19.

FIG. 5 shows a ground member 1 connected to a hose H and a metal pipe 17.
8A and 8B are explanatory views showing a state in which the hose H is attached to the metal pipe 17, FIG. 12B is a state before the hose H is fitted to the metal pipe 17, and FIG. It is a figure showing the state where it was attached to hose H and metal pipe 17.

FIG. 6 is a front view showing a conventional example.

FIG. 7 is a front view showing a hose H.

8A and 8B are views showing a conventional earth member 6, wherein FIG. 8A is a developed view, FIG. 8B is a perspective view showing a state where the insertion portion 8 is inserted into the insertion hole 10, and FIG. It is a perspective view which shows the state which folded back 8.

[Explanation of symbols]

 H Hose 3 Conductive wire 4 Reinforcement member 17 Metal pipe 18 Ground member 19 Coil part

Claims (4)

[Claims] 1. A hose having a conductive wire exposed on the surface of a hose is fitted into a grounded metal pipe.
A hose connection structure wherein a ring-shaped metal ground member is fitted to a connection portion between the metal pipe and the hose, and the ground member is brought into contact with the metal pipe and a conductive wire on the surface of the hose. 2. The hose connection structure according to claim 1, wherein the grounding member is formed in a coil shape. 3. The hose connection structure according to claim 2, wherein the coil-shaped grounding member has an inner diameter of the coil portion increased from the metal pipe side toward the hose side. 4. The hose according to claim 2, wherein a reinforcing member is spirally wound around the surface of the hose, and a coiled ground member is screwed onto the surface of the hose.
Hose connection structure as described.