JP2014139479A - Seal member, annular member, and method of manufacturing seal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal member, an annular member, and a method of manufacturing the seal member capable of improving the reliability.SOLUTION: A seal member 40 includes: a base member 50 with a hole H4 formed on a central part thereof; a first annular member 51 which is provided with first protrusion parts 61 protruded in the thickness direction along the hole H4 respectively from both surfaces of the base member 50 on the outer circumferential side than the hole H4 and a first groove part 71 formed along the edge surface of the outer circumferential side, and has an annular shape more flexible than the base member 50; and a second annular member 52 which is provided with second protrusion parts 62 protruded in the thickness direction along the outer circumference of the base member 50 respectively from both surfaces of the base member 50 on the outer circumferential side than the first protrusion part 61 and a second groove part 72 formed along the edge surface of the inner circumferential side, and has an annular shape more flexible than the base member 50.

Description

  The present invention relates to a seal member, an annular member, and a method for manufacturing a seal member.

Patent Document 1 describes a packing for a switch case. On the seal surface of the switch case packing, at least one seal protrusion is formed in the circumferential direction.
According to this switch case packing, the sealing performance is improved.

JP 2002-75141 A

  An object of this invention is to provide the manufacturing method of the sealing member which can improve reliability, an annular member, and a sealing member.

In order to solve the above-described problem, according to one aspect of the present invention, a base member having a hole formed in the center portion;
A first protrusion projecting in the thickness direction along the hole from both surfaces of the base member on the outer peripheral side of the hole, and a first groove formed along the outer peripheral end surface; An annular first annular member that is softer than the base member;
A second protrusion that protrudes in the thickness direction along the outer periphery of the base member from both surfaces of the base member on the outer peripheral side of the first protrusion, and a second protrusion that is formed along the end surface on the inner peripheral side. A seal member provided with two groove portions and an annular second annular member that is softer than the base member is applied.

  Moreover, according to another viewpoint, the 1st annular member with which the said sealing member is provided is applied.

  Moreover, according to another viewpoint, the 2nd annular member with which the said sealing member is provided is applied.

According to another aspect, there is provided a method for manufacturing the seal member,
Inserting the peripheral edge of the hole of the base member into the first groove, and assembling the first annular member to the base member;
A sealing member manufacturing method including a step B of inserting an outer peripheral edge of the base member into the second groove and assembling the second annular member to the base member is applied.

  According to the present invention, the reliability can be further improved compared to the case where the configuration of the present invention is not provided.

It is a perspective view of the switch concerning one embodiment of the present invention. It is a side view of the switch. It is an exploded view of the switch. It is the exploded view of the same switch seen from the angle different from FIG. It is an exploded view which shows the attachment structure of the sealing member of the switch. It is explanatory drawing which shows the attachment state of the sealing member of the switch. It is a side cross section which shows the attachment part of the sealing member of the switch. It is a front view of the sealing member of the switch. It is a sectional side view (XX sectional drawing of FIG. 8) of the sealing member of the switch. It is the A section enlarged view of FIG. It is a sectional side view of the 1st elastic member which the sealing member of the switch has. It is a front view which shows the modification of the sealing member of the switch. It is a sectional side view which shows the modification of the sealing member of the switch. It is a sectional side view of the 2nd elastic member which the sealing member of the switch has. It is a flowchart which shows the manufacturing method of the sealing member of the switch.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. In each drawing, portions not related to the description may be omitted.

  As shown in FIGS. 1 and 2, the switch 10 according to an embodiment of the present invention insulates and supports the case 12, a total of six terminals T extending outward from the case 12, and each terminal T. An insulator 14 and a fixture 16 for fixing the switch 10 on a pillar are provided.

  The case 12 includes an upper case 12U on the upper side and a lower case 12L on the lower side. In the upper case 12U, for example, three holes (first holes) H1 shown in FIG. 3 are formed on one side surface, and three holes H1 are also formed on the other side. Inside the case 12, a contact and an opening / closing part for opening and closing the contact are housed.

Each terminal T is connected to a contact provided inside the case 12 through each hole H1.
Each insulator 14 is provided through each hole H1. The insulator 14 is fixed to the upper case 12U.
The fixture 16 extends upward from the upper surface of the upper case 12U. A hook 17 is provided at the tip of each fixture 16.
In addition, the leg part 24 provided in the lower side surface of the upper case 12U is a support member for placing the switch 10 on the floor surface. The handle 26 shown in FIG. 3 is a member for manually operating the opening / closing part.

Next, the attachment structure of each insulator 14 will be described in detail.
As shown in FIGS. 3 and 4, each insulator 14 is provided with a flange-shaped fixing portion 32 having a large radial direction.
The seal member 40 is in contact with the surface of the fixed portion 32 on the side of the upper case 12U. The switch 10 is waterproofed by the seal member 40.
The fixing member 42 is in contact with the surface of each fixing portion 32 opposite to the upper case 12U.

As shown in FIG. 5, the fixing member 42 has a shape in which each side portion of a rectangular plate is bent toward the upper case 12 </ b> U.
When viewed from the direction in which the terminal T extends, a hole H2 through which the terminal T and the insulator 14 pass is formed at the center of each fixing member 42. A hole H3 is formed at each corner of each fixing member.

As shown in FIG. 5, four studs STD extending outward are arranged around each hole H1 formed in the upper case 12U. Each stud STD passes through the hole H3 of the fixing member 42. A nut N is fastened to each stud STD from the outside.
When the nut N is fastened to each stud STD, the fixing portion 32 of the insulator 14 is pressed against the upper case 12U by the fixing member 42 as shown in FIGS. That is, the fixing portion 32 of the insulator 14 is fixed to the upper case 12U via the seal member 40.

Next, the seal member 40 will be described in detail.
As shown in FIGS. 8 to 10, the sealing member 40 includes a base member 50, a first elastic member (an example of a first annular member and a first sealing annular member) 51, and a second elastic member. (Second annular member, an example of a second sealing annular member) 52.

  The base member 50 is, for example, an annular plate member. When viewed in a plan view, a hole (second hole) H4 (see FIG. 9) through which the terminal T and the insulator 14 pass is formed at the center of the base member 50. The base member 50 is formed of a material harder than the first and second elastic members 51 and 52. The material of the base member 50 is, for example, metal or ceramic.

The first elastic member 51 is an annular member having a hole H5 formed at the center, for example. The first elastic member 51 is attached to the inner peripheral side of the base member 50. The first elastic member 51 is formed of a softer material than the base member 50. The material of the first elastic member 51 is an elastic body such as rubber, for example. The material of the first elastic member 51 can be appropriately selected in consideration of the sealing performance, weather resistance performance, and durability performance of the sealing member 40.
The first elastic member 51 has an inner peripheral edge around the hole H4 formed in the base member 50 (on the outer peripheral side of the hole H4) in the thickness direction from both sides of the base member 50 along the hole H4. A projecting first projecting portion 61 is formed.
The first elastic member 51 has a positioning portion 65 for positioning the radial position of the first elastic member 51 with respect to the insulator 14 on the inner peripheral side of the first protruding portion 61. The thickness of the positioning portion 65 is thinner than the thickness of the base member 50.
The size of the hole H5 formed in the central portion of the first elastic member 51 is slightly larger than the outer diameter of the insulator 14 passing through the inside of the hole H5. Therefore, the positioning portion 65 sets the radial position of the first elastic member 51 (the radial position of the seal member 40) with respect to the insulator 14 passing through the hole H5 within a predetermined range.

The first elastic member 51 will be described with reference to FIG. 11. The first elastic member 51 is formed with a first protrusion 61 that protrudes from both sides along the hole H5 in the thickness direction. ing.
Further, the first elastic member 51 has a groove 71 formed along the outer peripheral end surface. The inner peripheral edge portion of the hole H4 formed in the base member 50 is inserted into the groove portion 71.

As shown in FIGS. 8 to 10, the second elastic member 52 is an annular member in which, for example, a hole H <b> 6 is formed at the center. The second elastic member 52 is attached to the outer peripheral side of the base member 50. The second elastic member 52 is formed of a softer material than the base member 50. The material of the second elastic member 52 is an elastic body such as rubber, for example. The material of the second elastic member 52 can be appropriately selected in consideration of the sealing performance, weather resistance performance, and durability performance of the sealing member 40. The material of the second elastic member 52 may be different from the material of the first elastic member 51.
The second elastic member 52 has a thickness direction along the outer periphery of the base member 50 from both sides of the base member 50 at the outer peripheral edge (outer peripheral side of the first elastic member 51) outside the base member 50. A second projecting portion 62 is formed to project.
As shown in FIGS. 12 and 13, the second elastic member 52 has a thin portion 75 that protrudes in the radial direction and is thinner than the thickness of the base member 50 on the outer peripheral side of the second protrusion 62. May be.
Note that the thin-walled portion 75 may be provided so as to project not only over a part of the outer periphery of the second projecting portion 62 but over the entire circumference.

When the single unit of the second elastic member 52 is described with reference to FIG. 14, second projecting portions 62 that project in the thickness direction along the holes H <b> 6 (see FIG. 8) from both surfaces are formed.
Further, the second elastic member 52 has a groove 72 formed along the end surface on the inner peripheral side. The outer peripheral edge of the base member 50 is inserted into the groove 72.

  In the seal member 40, the first and second protrusions 61 and 62 are attached by being crushed by the outer surface of the case 12 and the fixing portion 32 of the insulator 14. The base member 50 can have a function of controlling the amount of crushing.

Next, a method for manufacturing the seal member 40 will be described.
As shown in FIG. 15, first, as step A, the inner peripheral edge around the hole H4 (see FIG. 9) of the base member 50 is formed in the groove 71 (first groove) of the first elastic member 51 shown in FIG. Insert. At that time, the operator can also fit the first elastic member 51 into the base member 50 by pulling the positioning portion 65 of the first elastic member 51. The groove 71 and the inner peripheral edge of the base member 50 may be bonded or fused.

Next, as step B, the outer peripheral edge of the base member 50 is inserted into the groove 72 (second groove) of the second elastic member 52 shown in FIG. When the second elastic member 52 has the thin portion 75 shown in FIGS. 12 and 13, the operator pulls the thin portion 75 of the second elastic member 52 to move the base member 50 to the second portion. It can also be fitted into the elastic member 52. The groove 72 and the outer peripheral edge of the base member 50 may be bonded or fused.
As described above, the seal member 40 is manufactured by performing the process A and the process B.
Process A and process B can be performed in the reverse order.

  According to the seal member 40 according to the present embodiment, the switch 10 is sealed by the first elastic member 51 and the second elastic member 52, respectively, so that the reliability of the seal member 40 is improved. In particular, the deterioration of the second elastic member 52 due to the environment is suppressed from proceeding to the first elastic member 51.

  In addition, this invention is not limited to the above-mentioned embodiment, The change in the range which does not change the summary of this invention is possible. For example, a case where the invention is configured by combining some or all of the above-described embodiments and modifications is also included in the technical scope of the present invention.

The seal member shown in the above-described embodiment can also be applied as a seal member used for equipment other than a switch.
The number of terminals (the number of first holes) is not limited to six.

10: Switch, 12: Case, 12L: Lower case, 12U: Upper case, 14: Insulator, 16: Fixing tool, 17: Hook, 24: Leg part, 26: Handle, 32: Fixed part, 40: Seal Member: 42: fixing member, 50: base member, 51: elastic member, 52: elastic member, 61: first protrusion, 62: second protrusion, 65: positioning part, 71, 72: groove part, 75 : Thin part, H1, H2, H3, H4, H5, H6: Hole, N: Nut, T: Terminal, STD: Stud

Claims (4)

A base member having a hole in the center,
A first protrusion projecting in the thickness direction along the hole from both surfaces of the base member on the outer peripheral side of the hole, and a first groove formed along the outer peripheral end surface; An annular first annular member that is softer than the base member;
A second protrusion that protrudes in the thickness direction along the outer periphery of the base member from both surfaces of the base member on the outer peripheral side of the first protrusion, and a second protrusion that is formed along the end surface on the inner peripheral side. A seal member provided with an annular second annular member provided with two groove portions and softer than the base member.   The 1st annular member with which the seal member according to claim 1 is provided.   The 2nd annular member with which the seal member according to claim 1 is provided. It is a manufacturing method of the sealing member according to claim 1, Comprising:
Inserting the peripheral edge of the hole of the base member into the first groove, and assembling the first annular member to the base member;
A method of manufacturing a seal member, comprising: a step B of inserting an outer peripheral edge portion of the base member into the second groove portion and assembling the second annular member to the base member.

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