JPH0214585B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Application Field The present invention provides a synthetic resin J packing comprising a lip portion integrally connected to the inner peripheral edge of a flange portion;
A sealing device comprising a clamping part that clamps the flange part of the J packing from both sides thereof, and first and second metal support members respectively provided at one end of the cylindrical part and to which the other end of the cylindrical part is caulked and connected; Regarding its manufacturing method.

(2) Conventional technology In the past, when manufacturing such a sealing device, J.
The packing is formed by drawing from an annular plate or cutting from a cylindrical body.
The support member is formed by pressure forming after cutting a plate-shaped metal plate from a rectangular metal plate.

(3) Problems to be Solved by the Invention According to the conventional manufacturing method, when the sealing device becomes large, a huge amount of manufacturing cost is required, and there is a problem in terms of economic efficiency. In other words, when forming J Packkins, the inner and outer diameters of the cylindrical material used as the material for the annular plate are large, which leads to an increase in the size of the material manufacturing equipment, which increases production costs. In this case, the manufacturing cost increases due to the increased size of the cylindrical body manufacturing device, and cutting waste is generated, resulting in waste.
Furthermore, when forming the first and second supporting members, scraps at the corners and hollow parts after cutting out the disc-shaped metal plate are wasted, leading to an increase in manufacturing costs.

The present invention has been made in order to eliminate such conventional drawbacks, and uses synthetic resin materials and metal materials effectively without waste, and also reduces manufacturing costs by making it unnecessary to increase the size of manufacturing equipment by increasing the size. An object of the present invention is to provide a sealing device and a method for manufacturing the same.

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the device of the present invention uses a synthetic resin J packing which has a lip part integrally connected to the inner peripheral edge of the flange part. , a clamping part that clamps the flange part of the J packing from both sides thereof is provided at one end of the cylindrical part, and the other ends of the cylindrical part are connected to each other by caulking. In the sealing device, the J packing is formed by heat-molding a synthetic resin cylindrical body having a weld line extending along the axial direction over the entire axial length thereof, and the first and second support members include:
The method of the present invention is characterized in that it is formed by pressure forming a metal cylindrical body having a welding line extending along the axial direction over its entire axial length. After forming the body, the synthetic resin cylindrical body is heated and formed to form the flange portion and the lip portion to obtain the J packing, and the two ends of the metal sheet body are welded to each other to form the cylindrical body. After forming, the first and second supporting members are obtained by press-forming the metal cylindrical body to form the cylindrical part and the holding part, respectively, and holding the first and second supporting members. The method is characterized by comprising a step of caulking the other ends of the cylindrical portions of both supporting members with the flange portion of the J packing sandwiched between the two portions.

(2) Function J Packkin is heat-formed from a cylindrical body obtained by winding a synthetic resin sheet body into a cylindrical shape and welding both ends of the sheet body, while the first and second support members are made of metal. It is press-formed from a cylindrical body obtained by winding a sheet body into a cylindrical shape and welding both ends of the sheet body.

Then, with the flange portion of the J packing sandwiched between the clamping portions of the first and second support members, the other ends of the cylindrical portions of both support members are caulked together to obtain a sealing device.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIG.
This is applied, for example, to a sealed portion of a rolling roll or the like, and performs a sealing function by slidingly contacting the surface of a rotating shaft 2 having a relatively large diameter.

This sealing device 1 is constructed by sandwiching a J-packet 3 made of synthetic resin, such as fluorine resin, between first and second support members 4 and 5 made of metal plates.

The J packing 3 has a lip portion 7 integrally connected to the inner circumferential edge of an annular plate-shaped flange portion 6, which is in sliding contact with the outer surface of the rotating shaft 2. Also, the first support member 4
The annular plate-shaped clamping part 8 that abuts one surface of the flange part 6 of the J packing 3 is integrally connected to one end of the cylindrical part 9, and is formed in a substantially L-shape in longitudinal section. Further, in the second support member 5, a clamping part 10 that abuts the other surface of the flange part 6 to clamp the flange part 6 between it and the clamping part 8 of the first support member 4 is integrated with one end of the cylindrical part 11. It is formed in a substantially L-shape in longitudinal section. Moreover, the outer diameter of the cylindrical portion 9 of the first support member 4 is set to such an extent that it can fit into the cylindrical portion 11 of the second support member 5, and
The length of the cylindrical portion 11 of the support member 5 is determined so that the other end can be bent and wrapped around the other end of the cylindrical portion 9 of the first support member 4 for caulking.

Next, the steps for manufacturing the sealing device 1 will be explained. First, in manufacturing the J packing 3, as shown in FIG. 2, a cylindrical material 12 made of fluorine resin is prepared. do. This material 12 is skived and cut to a predetermined length l1 to obtain a belt-like sheet body 13 as shown in FIG. Next, both ends of the sheet body 13 are welded to form a cylindrical body 15 having a weld line 14 along the axial direction along the entire length of the cylindrical body 15, as shown in FIG.

If the cylindrical body 15 is formed in this way, in the case of the conventional manufacturing method in which an annular plate is made from a cylindrical material and then heated and drawn, the outer diameter of the material is
However, the diameter d of the material 12 according to the present invention can be much smaller than the dimension D1, and the manufacturing equipment can also be quite small.

After forming the cylindrical body 15, the cylindrical body 15 is heat-formed, for example, while being rotated, to obtain a J-packet 3 having a substantially J-shaped longitudinal section with the flange portion 6 and the lip portion 7, as shown in FIG. After that, the flange part 6
By finishing the tip of the lip portion 7, the manufacturing process of the J packing 3 is completed.

When the length along the axial direction of the J packing 3 formed in this way is W1', the length of the cylindrical body 15, that is, the width of the sheet body 13 and the width W1 of the material 12, is determined by the heating of the cylindrical body 15. It is set in consideration of dimensional changes so as to obtain the final dimension W1' due to molding. Further, the outer diameter D1 of the cylindrical body 15, that is, the length l1 of the sheet body 13, is also set in advance so that the final inner and outer diameters of the J packing 3 can be obtained.

Next, in forming the first support member 4, for example, as shown in FIG.
A sheet body 17 as shown in the figure is formed, and both ends of the sheet body 17 are welded to form a cylindrical body 19 having a weld line 18 along the axial direction over the entire length in the axial direction as shown in FIG. Form.

If the cylindrical body 19 is formed in this way, the length corresponding to the outer diameter D2 of the cylindrical body 19 can be reduced to 1 in the conventional method.
Whereas a rectangular metal plate material for the sides was required, the length l2 and width W2 of the sheet body 17 according to the present invention can be smaller than the metal plate material.
For example, when the diameter of rotating shaft 2 is 300mmφ,
In the past, a square metal plate with one side of 350 mm was required, but with the present invention, a rectangular metal plate with one side of 30 mm and the other side of (π x 350) mm can be used, reducing the size by about 1/3. Become.

After the cylindrical body 19 is formed, the cylindrical body 19 is pressure-molded using, for example, a roller while rotating, thereby obtaining the first support member 4 having a substantially L-shaped longitudinal section as shown in FIG. At this time, almost no surplus scraps are generated from the cylindrical body 19, and the generation of wasteful scraps that conventionally occurs can be avoided.

Note that the outer diameter D2 and length of the cylindrical body 19, that is, the length l2 and width W2 of the sheet body 17, are the inner diameter and outer diameter and length of the first support member 4 to be manufactured.
Corresponding to W2', it is set in advance to take into account dimensional changes due to processing.

Regarding the molding of the second support member 5, the above-mentioned first
The process is basically the same as the process for forming the support member 4.

As mentioned above, J Packkin 3, the first and second
At the stage where the supporting members 4 and 5 are formed, the flange part 6 of the J packing 3 is sandwiched between the holding parts 8 and 10 of the first and second supporting members 4 and 5, and the cylindrical part 11 of the second supporting member 5 is The other end is connected to the cylindrical portion 9 of the first support member 4.
The seal device 1 is assembled by caulking and joining the other end.

Since such a seal device 1 uses fluororesin as the material for the J-packet 3, when applied to the sealing part of a rolling roll, etc., it will fully utilize the characteristics of fluororesin in terms of water resistance and heat resistance. It is possible to obtain excellent sealing performance.

In the above embodiment, fluororesin was used as the material for the J packing 3, and the cylindrical material 12 was skived to obtain the sheet body 13. The sheet-like material may be used as is, and it is also possible to use synthetic resins other than fluororesin as the material for the J-packet 3.

C. Effects of the invention As described above, according to the present invention, J Packkin can:
A synthetic resin cylindrical body having a weld line along the axial direction over its entire axial length is heat-molded, and the first and second support members have a weld line along the axial direction over the entire axial length. Each is constructed by pressure forming a metal cylindrical body with a
A synthetic resin cylindrical body with shape-retaining properties can be easily obtained by simply winding the necessary minimum synthetic resin sheet body corresponding to the dimensions of J Packkin once and welding both ends together. When heat-molding J-packets from the synthetic resin cylinders, the handling of the cylinders, especially the work of setting them into molds, etc., is extremely easy, so the overall productivity of J-packets is significantly improved. Similarly, shape retention can be achieved by simply winding the minimum necessary metal sheet body corresponding to the dimensions of the first and second supporting members once and welding both ends together. This is because it is easy to obtain a metal cylindrical body with a metal cylindrical body, and the handling of the cylindrical body, especially the setting work in a mold, when heat-forming a support member from the metal cylindrical body is extremely easy. , it is possible to significantly improve the productivity of the first and second supporting members as a whole, and therefore it can greatly contribute to improving the productivity of a sealing device that combines these J packings and supporting members.

In addition, when forming J-packs, compared to the conventional equipment described above, which involves drawing from a synthetic resin annular plate or cutting from a cylindrical body, the effectiveness of the material before processing is improved. By keeping the diameter small, it is possible to downsize the material manufacturing device, and there is no risk of wasteful cutting waste being produced. Further, since the first and second supporting members can be pressure-formed from the metal sheet body without producing wasteful scraps, the plate-shaped metal plate is punched out from the rectangular metal plate as in the conventional apparatus. The yield of unprocessed metal plates can be greatly improved compared to a method in which the metal sheets are press-formed after processing.
Therefore, together with the effect of improving the individual productivity of the J packing and supporting members as described above,
This can greatly contribute to cost reduction.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the sealing device of the present invention, and FIGS. 2 to 5 sequentially show the forming process of J packing.
The figure is a perspective view of a cylindrical material, Figure 3 is a perspective view of a synthetic resin sheet body, Figure 4 is a perspective view of a cylindrical body, and Figure 5 is a perspective view of a cylindrical body.
The figure is a longitudinal cross-sectional view of J packing, Figures 6 to 9 sequentially show the forming process of the first support member, Figure 6 is a perspective view of the metal strip material, and Figure 7 is the metal sheet body. FIG. 8 is a perspective view of the cylindrical body, and FIG. 9 is a longitudinal sectional view of the first support member. 1... Seal device, 3... J Packkin, 4...
First support member, 5... Second support member, 6... Flange portion, 7... Lip portion, 8, 10... Clipping portion,
9, 11... Cylindrical part, 13... Synthetic resin sheet body, 14... Welding line, 15... Synthetic resin cylindrical body, 17... Metal sheet body, 18... Welding line,
19...Metal cylindrical body.

Claims (1)

[Claims] 1. A synthetic resin J packing 3 in which a lip part 7 is integrally connected to the inner peripheral edge of the flange part 6, and a clamping device that holds the flange part 6 of the J packing 3 from both sides thereof. First and second metal parts 8 and 10 are provided at one end of the cylindrical parts 9 and 11, respectively, and the other ends of the cylindrical parts 9 and 11 are caulked together.
In a sealing device consisting of support members 4 and 5,
The J packing 3 has a weld line 14 along the axial direction.
The first and second support members 4 and 5 are formed by thermoforming a synthetic resin cylindrical body 15 having a welding line 18 along the entire axial direction.
A sealing device characterized in that it is formed by pressure-forming a metal cylindrical body 19 having a metal cylinder 19 along its entire axial length. 2. A synthetic resin J packing 3 having a lip part 7 integrally connected to the inner circumferential edge of the flange part 6, and holding parts 8 and 10 that hold the flange part 6 of the J packing 3 from both sides of the cylinder. First and second metal parts are provided at one end of the cylindrical parts 9 and 11, respectively, and the other ends of the cylindrical parts 9 and 11 are caulked together.
In the method for manufacturing a sealing device comprising supporting members 4 and 5, after welding both ends of a synthetic resin sheet body 13 to each other to form a cylindrical body 15, the synthetic resin cylindrical body 15 is heat-formed to form the flange. The process of obtaining the J packing 3 by forming the part 6 and the lip part 7, and forming the cylindrical body 19 by welding both ends of the metal sheet body 17, and then press-forming the metal cylindrical body 19. and the cylindrical parts 9, 11
and a step of obtaining the first and second support members 4, 5 by forming the clamping parts 8, 10, respectively, and inserting the J packing between the clamping parts 8, 10 of the first and second support members 4, 5. The cylindrical portions 9 of both supporting members 4 and 5 sandwich the flange portion 6 of 3,
1. A method of manufacturing a sealing device, comprising the step of caulking the other ends of the two ends together. 3. The method of manufacturing a sealing device according to claim 2, wherein the synthetic resin sheet body 13 is obtained by skiving a cylindrical material 12 made of fluororesin.