JP2018135930A - Passage structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure higher sealability.SOLUTION: A passage structure 100 includes: an eye bolt 1; an eye joint 2; and a packing 3 formed by connecting a first packing part 31, in which an upper surface contacts with the eye bolt 1 and a bottom surface contacts with an upper surface of the eye joint 2, with a second packing part 32 in which an upper surface contacts with a bottom surface of the eye joint 2 and a bottom surface contacts with a wall surface 5. A material layer made of a material that can reduce frictional force is formed on the upper surface F1 of the first packing part 31. Alternatively, material layers made of a material that can reduce frictional force are formed on the bottom surface F2 of the first packing part 31, the upper surface F3 of the second packing part 32, and the bottom surface F4 of the second packing part 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a channel structure through which a fluid flows.

  Conventionally, eyebolts and eye joints are known as examples of the channel structure. For example, Patent Document 1 discloses a configuration including a U-shaped packing in addition to an eyebolt and an eye joint.

  Such a U-shaped packing includes a first packing portion sandwiched between the eyebolt and the upper surface of the eye joint, a second packing portion sandwiched between the bottom surface of the eye joint and the wall surface of a predetermined member / part, A connecting portion that connects the first packing portion and the second packing portion;

JP-A-7-77294

  However, in the above-described U-shaped packing, when the eyebolt is rotated and tightened, for example, a large frictional force is generated on the contact surface between the eyebolt and the first packing portion, so that the connecting portion is in the rotational direction of the eyebolt. There is a risk of twisting and deforming. As a result, the sealing performance is lowered and the fluid overflows.

  An object of the present invention is to provide a flow channel structure that can ensure higher sealing performance.

  The flow channel structure of the present invention includes an eyebolt formed by communicating a first flow channel along the axial direction and a second flow channel along a direction perpendicular to the axial direction, and the eyebolt is inserted therethrough. When the eye joint is formed, an eye joint having a third flow path communicating with the second flow path is formed, and when the eye bolt is inserted, the upper surface contacts the eye bolt and the bottom surface contacts the upper surface of the eye joint. A first packing part, and a packing in which a top surface is in contact with a bottom surface of the eye joint when the eyebolt is inserted, and a second packing part in which the bottom surface is in contact with a predetermined wall surface is connected. A material layer made of a material capable of reducing frictional force is formed on the upper surface of the packing portion, or on the bottom surface of the first packing portion, the upper surface of the second packing portion, and the bottom surface of the second packing portion. The material layer is formed.

  According to the present invention, higher sealing performance can be ensured.

The perspective view which shows the external appearance of the flow-path structure which concerns on embodiment of this invention The perspective view which shows the external appearance of the eyebolt which concerns on embodiment of this invention, an eye joint, and a U-shaped packing Sectional drawing which shows the internal structure of the flow-path structure which concerns on embodiment of this invention

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, with respect to the surface of each component, in the drawing, the surface facing upward is referred to as “upper surface”, and the surface facing downward is referred to as “bottom surface”.

  First, the outline of the flow channel structure 100 according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing the appearance of the flow channel structure 100 of the present embodiment.

  As shown in FIG. 1, the flow path structure 100 includes an eye bolt 1, an eye joint 2, and a U-shaped packing 3. FIG. 1 shows a state in which the eyebolt 1 is inserted into the eye joint 2 through the U-shaped packing 3.

  Although details will be described with reference to FIG. 3, the eye joint 2 is connected to the pipe 4. The flow path structure 100 may not include the pipe 4 as a constituent element.

  Next, outlines of the eyebolt 1, the eye joint 2, and the U-shaped packing 3 will be described with reference to FIG. 2. FIGS. 2A to 2C are perspective views showing the appearance of the eyebolt 1, the eye joint 2, and the U-shaped packing 3.

  As shown in FIG. 2A, the eyebolt 1 includes a head portion 11 that is subjected to a tightening operation (rotation operation), and a cylindrical portion 12 that extends downward from the bottom surface of the head 11.

  The head portion 11 and the cylindrical portion 12 are integrally formed, for example. A first flow path 13 (not shown in FIG. 2A, see FIG. 3) and a second flow path 14 to be described later are formed in the cylindrical portion 12.

  As shown in FIG. 2B, the eye joint 2 has a substantially cylindrical eye joint body 21.

  The eye joint body 21 has an insertion hole 24 formed on the upper surface thereof, and an insertion hole 25 (not shown in FIG. 2B, see FIG. 3) formed on the bottom surface thereof. The cylindrical portion 12 of the eyebolt 1 is inserted through the insertion holes 24 and 25.

  Other configurations of the eye joint 2 will be described later with reference to FIG.

  As shown in FIG. 2C, the U-shaped packing 3 includes a first packing portion 31, a second packing portion 32, and a connecting portion 33. Each part is integrally molded, for example.

  As shown in FIG. 1, the U-shaped packing 3 is arranged so that the eye joint body 21 is sandwiched between the first packing portion 31 and the second packing portion 32.

  The first packing portion 31 is a portion that is sandwiched between the bottom surface of the head 11 of the eyebolt 1 and the top surface of the eye joint body 21.

  The first packing part 31 is formed with an insertion hole 34 through which the cylindrical part 12 of the eyebolt 1 is inserted. The insertion hole 34 has, for example, the same size and the same shape as the insertion hole 24 of the eye joint 2.

  The upper surface F1 of the first packing part 31 is a surface that contacts the bottom surface of the head 11 of the eyebolt 1. The bottom surface F <b> 2 of the first packing portion 31 is a surface that contacts the top surface of the eye joint body 21.

  The 2nd packing part 32 is a part pinched by the bottom face of the eye joint main body 21, and the wall surface 5 (refer FIG. 3) of a predetermined member (it may be a predetermined component).

  The second packing part 32 is formed with an insertion hole 35 through which the cylindrical part 12 of the eyebolt 1 is inserted. The insertion hole 35 has, for example, the same size and the same shape as the insertion hole 25 (see FIG. 3) of the eye joint 2.

  The upper surface F3 of the second packing portion 32 is a surface that contacts the bottom surface of the eye joint body 21. The bottom surface F4 of the second packing portion 32 is a surface that contacts the wall surface 5 (see FIG. 3) of the predetermined member.

  The connecting portion 33 is a portion that connects the first packing portion 31 and the second packing portion 32.

  For example, the connecting portion 33 connects the first packing portion 31 and the second packing portion 32 outside the eye joint body 21 in a non-contact state with the outer surface of the eye joint body 21.

  The U-shaped packing 3 described above is formed of, for example, only metal (copper, aluminum, etc.), formed by coating metal with rubber, or formed by coating rubber with metal. To do.

  Next, the internal configuration of the flow path structure 100 will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the internal configuration of the flow channel structure 100 shown in FIG.

  As shown in FIG. 3, the eye joint body 21 is sandwiched between the first packing part 31 and the second packing part 32. The cylindrical portion 12 of the eyebolt 1 is inserted through the insertion holes 34, 24, 25, and 35, and the tip of the cylindrical portion 12 is fixed to the wall surface 5 of the predetermined member.

  At this time, the upper surface F1 of the first packing part 31 is in contact with the bottom surface of the head 11 of the eyebolt 1. Further, the bottom surface F <b> 2 of the first packing part 31 is in contact with the upper surface of the eye joint body 21.

  Further, the upper surface F3 of the second packing portion 32 is in contact with the bottom surface of the eye joint body 21. The bottom surface F4 of the second packing part 32 is in contact with the wall surface 5 of the predetermined member.

  In addition to the eye joint body 21, the eye joint 2 includes a branch pipe 22 provided so as to protrude from the side surface of the eye joint body 21. A pipe 4 is connected to the branch pipe 22.

  An annular groove 23 is formed inside the eye joint body 21. The concave groove portion 23 corresponds to an example of a third flow path. The concave groove 23 and the flow path in the branch pipe 22 may be combined to correspond to an example of a third flow path.

  The cylindrical portion 12 of the eyebolt 1 is formed with a first flow path 13 along the axial direction (the direction indicated by the arrow d in the figure), and the direction perpendicular to the axial direction (the arrow b, A second flow path 14 penetrating in the direction indicated by c) is formed. The first flow path 13 and the second flow path 14 are in communication. In addition, the second flow path 14 communicates with the concave groove portion 23.

  In such a channel structure 100, a predetermined fluid (for example, cooling water, fuel, oil, gas (gas), etc.) flows in the order of arrows a to d shown in FIG. That is, the fluid that has flowed from the pipe 4 into the branch pipe 22 of the eye joint 20 as indicated by the arrow a flows into the second flow path 14 of the eyebolt 1 from the recessed groove portion 23 as indicated by the arrows b and c. Thereafter, the fluid flows into the first flow path 12 as indicated by the arrow d, and is supplied to the inside of the predetermined member having the wall surface 5.

  Note that the flow of the fluid is not limited to the order of arrows a to d in FIG. 3, and may be reversed in the order. That is, the fluid flows from the inside of the predetermined member into the first flow path 13, then flows into the concave groove portion 23 via the second flow path 14, and flows into the pipe 4 through the branch groove 22 from the concave groove portion 23. Good.

  The flow path structure 100 described above may be mounted on, for example, a vehicle or may be mounted on a device / system other than the vehicle.

  Next, a characteristic configuration of the flow channel structure 100 of the present embodiment will be described below.

  For example, in a state where the eye joint 2 and the U-shaped packing 3 are fixed, the cylindrical portion 12 of the eyebolt 1 is inserted into each of the insertion holes 24, 25, 34, and 35, and the head 11 is rotated. Is done. In this case, a frictional force is generated between the bottom surface of the head portion 11 and the upper surface F2 of the first packing portion 31, so that the connecting portion 33 may be twisted and deformed in the rotation direction. Due to such deformation, the sealing property of the U-shaped packing 3 is lowered, and fluid leakage occurs.

  Therefore, in the flow path structure 100 of the present embodiment, a material capable of reducing the frictional force (hereinafter referred to as a frictional force reducing material) is applied to the upper surface F1 of the first packing part 31. As a result, a layer made of a frictional force reducing material (hereinafter referred to as a material layer, not shown) is formed on the upper surface F1. Examples of the frictional force reducing material include water, oil, fuel, and the like.

  In this way, by forming a material layer on the upper surface F1 of the first packing part 31, when the tightening operation of the head part 11 is performed, the bottom surface of the head part 11 and the upper surface F2 of the first packing part 31 are formed. The frictional force generated between them can be reduced, and the deformation of the connecting portion 33 can be prevented. As a result, higher sealing performance can be ensured and fluid leakage can be prevented.

  In the above description, the case where the eye bolt 1 is tightened with the eye joint 2 and the U-shaped packing 3 fixed is described as an example, but the present invention is not limited thereto. For example, when the eyebolt 1 is tightened with the eyebolt 1 and the U-shaped packing 3 fixed, the bottom surface F2 of the first packing portion 31, the top surface F3 of the second packing portion 32, and the second A material layer made of a friction reducing material may be formed on each bottom surface F4 of the packing portion 32.

  Thereby, the frictional force generated between the bottom surface F2 of the first packing part 31 and the top surface of the eye joint body 21, the frictional force generated between the bottom surface of the eye joint body 21 and the top surface F3 of the second packing part 32, and The frictional force generated between the bottom surface F4 of the second packing part 32 and the wall surface 5 of the predetermined member can be reduced. Therefore, deformation of the connecting portion 33 can be prevented, higher sealing performance can be secured, and fluid leakage can be prevented.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and may be appropriately modified and implemented without departing from the spirit of the present invention. Is possible.

  For example, in the above embodiment, assuming that the eye joint 2 is located below the eyebolt 1, the surfaces of the eyebolt 1, the eye joint 2, and the U-shaped packing 3 face upward in each figure. The surface facing is defined as “upper surface” and the surface facing downward is defined as “bottom surface”, but the present invention is not limited to this. For example, it is assumed that the flow path structure 100 is used in an opposite direction (upside down) to the direction shown in FIG. In that case, the “top surface” and the “bottom surface” in the embodiments may be referred to as “bottom surface” and “top surface”, respectively.

  For example, in the said embodiment, although demonstrated taking the case where the U-shaped packing 3 was used as an example, a shape is not limited to a U-shaped. The packing applicable to this invention should just be the structure by which two packing parts are connected.

<Summary of this disclosure>
The flow channel structure of the present invention includes an eyebolt formed by communicating a first flow channel along the axial direction and a second flow channel along a direction perpendicular to the axial direction, and the eyebolt is inserted therethrough. When the eye joint is formed, an eye joint having a third flow path communicating with the second flow path is formed, and when the eye bolt is inserted, the upper surface contacts the eye bolt and the bottom surface contacts the upper surface of the eye joint. A first packing part, and a packing in which a top surface is in contact with a bottom surface of the eye joint when the eyebolt is inserted, and a second packing part in which the bottom surface is in contact with a predetermined wall surface is connected. A material layer made of a material capable of reducing frictional force is formed on the upper surface of the packing portion, or on the bottom surface of the first packing portion, the upper surface of the second packing portion, and the bottom surface of the second packing portion. The material layer is formed.

  In the flow channel structure, when the eyebolt is inserted into the eye joint and the packing in a state where the eye joint and the packing are fixed, and the eye bolt is rotated, the upper surface of the first packing portion is A material layer may be formed.

  Further, in the flow path structure, when the eyebolt is inserted into the eye joint and the packing in a state where the eyebolt and the packing are fixed, and the eyebolt is rotated, the bottom surface of the first packing portion, the first The material layer may be formed on the top surface of the two packing portions and the bottom surface of the second packing portion.

  Further, in the above-described flow path structure, the packing includes a connecting portion that connects the first packing portion and the second packing portion outside the eye joint in a non-contact state with the outer surface of the eye joint. May be.

  Further, in the above flow path structure, the material may be water, fuel, oil, or gas.

  The present invention can be applied to a channel structure through which a fluid flows.

DESCRIPTION OF SYMBOLS 1 Eyebolt 2 Eye joint 3 U-shaped packing 4 Piping 5 Wall surface 11 Head 12 Cylindrical part 13 1st flow path 14 2nd flow path 21 Eye joint main body 22 Branch pipe 23 Groove part (an example of 3rd flow path)
24, 25, 34, 35 Insertion hole 31 First packing part 32 Second packing part 33 Connecting part

Claims (5)

An eyebolt formed by communicating a first flow path along the axial direction and a second flow path along a direction perpendicular to the axial direction;
An eye joint formed with a third flow path communicating with the second flow path when the eyebolt is inserted;
When the eyebolt is inserted, a first packing portion whose upper surface is in contact with the eyebolt and whose bottom surface is in contact with the upper surface of the eye joint; and when the eyebolt is inserted, the upper surface is in contact with the bottom surface of the eye joint. And a packing connected to a second packing part whose bottom surface is in contact with a predetermined wall surface,
A material layer made of a material capable of reducing the frictional force is formed on the upper surface of the first packing part.
Or
The material layer is formed on the bottom surface of the first packing portion, the top surface of the second packing portion, and the bottom surface of the second packing portion,
Channel structure. When the eyebolt is inserted into the eye joint and the packing while the eye joint and the packing are fixed, and the eye bolt is rotated, the material layer is formed on the upper surface of the first packing portion.
The channel structure according to claim 1. When the eyebolt is inserted into the eye joint and the packing in a state where the eyebolt and the packing are fixed and the eyebolt is rotated, the bottom surface of the first packing portion, the top surface of the second packing portion, and the The material layer is formed on the bottom surface of the second packing part.
The channel structure according to claim 1. The packing is
On the outer side of the eye joint, provided with a connecting portion that connects the first packing portion and the second packing portion in a non-contact state with the outer surface of the eye joint.
The channel structure according to any one of claims 1 to 3. The material is
Water, fuel, oil or gas,
The channel structure according to any one of claims 1 to 4.

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