JP5289272B2 - Manufacturing method of joint gasket - Google Patents

Description

  The present invention relates to a method for manufacturing a retrofit type joint gasket that is attached to a joint between outer wall panels of a building.

  As shown in FIG. 1, the retrofit type joint gasket that is attached to the joint between the outer wall panels is attached over the stepped side edge portions of the outer wall panel 2 on both sides of the joint 1 and covers the joint 1. A joint type type or a bottom joint type that is pushed into the joint 3 as shown in FIG. In addition to this, as shown in FIG. 3, the column part 5 provided with the reinforcing insert 4, and the center part and the base (the indoor side part when mounted on the joint) of the pillar part 5 are provided to project to the left and right. Seal lip portions 6 and 7 that elastically contact the outer wall panels on both sides, a bridge 8 that connects the upper and lower seal lip portions 6 and 7 for reinforcement, and both ends are connected to the seal lip portion 6 and protrude from the seal lip portion 6 There is also known a joint gasket comprising a hollow seal portion 9 covering the column portion 5 and having a thick wall portion 9a formed at the center of a flat outdoor side wall portion 9b of the hollow seal portion 9 (Patent Document 1).

Japanese Patent Laying-Open No. 2005-127061 (FIG. 3)

  The joint gasket shown in FIG. 3 has the advantage that the thickness of the outdoor side wall portion 9b is increased by the thick wall portion 9a, whereby the outdoor side wall portion 9b is not easily deformed, maintains a flat surface, and maintains the appearance of the appearance. However, as shown in the figure, when the thick portion 9a is extruded in a state of being in contact with the pillar portion 5 and is commercialized with the thick portion 9a being fused to the pillar portion 5, a hollow seal is obtained along with insertion of the joint. When the part 9 is crushed from the side, the outdoor side wall part 9b is refracted into a V shape and is depressed, and the appearance is impaired.

  The joint gasket is usually made of rubber such as ethylene propylene rubber and is vulcanized after extrusion, but when the thick wall portion 9a is fused and temporarily fixed to the column portion 5, the hollow seal portion 9 On the other hand, there is an advantage that the formation is stable and there is no variation. On the other hand, if the thick wall portion 9a remains attached to the pillar portion 5, the outdoor side wall portion 9b becomes V-shaped in the same manner as above when mounted on the joint. Refracts and looks bad.

  In order to prevent the thick portion 9a and the pillar portion 5 from sticking to each other, it is necessary to design the thick portion 9a away from the pillar portion 5. However, if the thick portion 9a is separated from the pillar portion 5, The shape of the hollow seal portion 9 is increased at least in the height direction. As a result, the shape of the hollow seal portion becomes unstable, and variations in shape are likely to occur. If the hollow seal portion 9 is large, when the joint is narrow, the base of the column portion 5 hits and supports the base material or the column at the back of the joint so that the insertion into the joint becomes insufficient and the hollow seal portion protrudes from the joint. When the hollow seal portion is inserted while being crushed from the outdoor side, there is a risk that the shape will not be recovered even after mounting and the crushed state will be lost.

  The present invention provides a gasket manufacturing method in which the shape of the hollow seal portion 9 of the joint gasket shown in FIG. 3 is designed to a minimum necessary size, and the outdoor side wall portion 9b can maintain a flat surface when mounted on the joint. The purpose is to provide.

  The invention according to claim 1 includes a column part, a seal lip part projecting on both sides of the pillar part and elastically contacting the outer wall panels on both sides of the joint, and an upper end part of the column part projecting outward from the seal lip part The hollow side wall portion of the hollow seal portion is made of a rubber having one or more protrusions projecting toward the upper end portion of the column portion to reinforce the outdoor side wall portion on the inner side of the hollow side wall portion. A method for manufacturing a joint gasket, in which an extruding step is performed in a state in which the protrusion is in contact with the upper end of the column protruding from the seal lip, and after extrusion, the vulcanization is performed in a state in which the protrusion is in contact with the upper end of the column. Or a vulcanization step or cooling step for cooling, and a step of crushing the hollow seal portion from both sides after vulcanization or cooling to separate the protrusion from the upper end portion of the column portion, and separating the hollow seal portion The process is not cooled and solidified sufficiently It can also be carried out to the house.

The invention according to claim 2 is the invention according to claim 1, characterized in that both ends of the hollow seal portion are connected to a seal lip portion.
The invention according to claim 3 is the invention according to claim 1, wherein both ends of the hollow seal portion are connected to the column portion.

  According to the first aspect of the present invention, since the protrusion is pushed out in contact with the upper end of the column part, the shape of the hollow seal part can be designed to the minimum necessary size, and the size of the hollow seal part can be minimized. In addition, since the projections are vulcanized or cooled in a state where the projections are attached to the column portions and temporarily fixed, the shape of the hollow seal portion can be stabilized and variation in the shape can be suppressed, and the projections can crush the hollow seal portion. However, the separation is performed after vulcanization or cooling, so that the protrusion and the pillar can be reliably separated, and after separation, they are brought into contact and re-fused by thermal deformation. The protrusion is separated from the pillar, and the rigidity of the outdoor side wall is increased by the protrusion, and the shape of the hollow seal can be reduced to the minimum size. It can be easily restored even after being crushed, and the flat surface of the outdoor side wall can be maintained even after the joint is installed, and the hollow seal is supported by the gasket at the back of the joint when the joint is inserted by minimizing the shape of the hollow seal. This has the effect of not causing a problem in appearance such that the portion protrudes from the joint. As described above, it is possible to perform the step of separating the hollow seal portion before it is not sufficiently cooled.

  According to the invention of claim 2, since both ends of the hollow seal portion are connected to the seal lip portion, not only the hollow seal portion but also the crushing of the seal lip portion is hollow in the separation process of the hollow seal portion. Separation of the seal portion can be promoted.

  According to the invention of claim 3, since the hollow seal portion is not connected to the seal lip portion but is connected to the column portion, the seal lip portion is not involved in the separation process of the hollow seal portion, and is caused by entrainment. No damage will occur.

Sectional drawing of the conventional joint gasket of a covering joint type. Sectional drawing of the conventional joint gasket of a bottom joint type. Sectional drawing of the other conventional joint gasket. The figure which shows the manufacturing process of the joint gasket concerning this invention. Sectional drawing of the joint gasket concerning this invention. Sectional drawing of another example of the joint gasket concerning this invention. Sectional drawing of the joint gasket of another example concerning this invention. Sectional drawing of the joint gasket of the other example concerning this invention. Schematic of a crushing device. Sectional drawing which mounted the joint gasket shown in FIG. 5 on the joint. Sectional drawing which mounted the joint gasket shown in FIG. 5 on the fine joint.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 4 shows a manufacturing process of a joint gasket according to the present invention. A joint gasket 12 made of rubber (for example, EPDM, EPM, Q, CR, etc.) extruded from an extruder 11 is sent to a vulcanizer 13. After being vulcanized, the hollow seal portion is crushed by the crushing device 14 after vulcanization.

  FIG. 5 shows an example of a joint gasket extruded from the extruder 11, and the joint gasket 16 is provided so as to protrude left and right at the column portion 18 provided with the insert 17, and at the center and the root of the column portion 18. The seal lip portions 21 and 22 elastically contact the outer wall panels on both sides of the joint, and the hollow seal portion 23 that is connected to the seal lip portion 21 at both ends and covers the column portion 18 protruding from the seal lip portion 21, On the outdoor side wall portion 25 of the portion 23, a thick-walled trapezoidal projection 24 is formed on the inner wall of the central portion to reinforce the outdoor side wall portion, and is in contact with the column portion 18.

  FIG. 6 shows another example of the joint gasket. The joint gasket 26 is formed by replacing the projection 24 in the joint gasket 16 shown in FIG. 5 with a mountain-shaped projection 27, and the joint gasket 28 shown in FIG. In the joint gasket 28, the upper and lower seal lip portions 21 and 22 are connected to each other at both ends of the hollow seal portion 23 by the bridge 20. In the case of this joint gasket 28, both ends of the hollow seal portion 23 are continuously connected to the lower seal lips 22, 22 together with the left and right seal lip portions 21, 21 via the bridge 20. Separation can be further promoted in the separation step of the seal portion 23.

  In the joint gasket 28 shown in FIG. 7, the end of the hollow seal portion and the seal lip portion 21 and the connection portion of the bridge 20 and the seal lip portion 21 are located at the same position vertically across the seal lip portion 21. However, even if the connecting portion between the bridge 20 and the seal lip portion 21 is located closer to the column portion 18 than the connecting portion between the hollow seal portion 23 and the seal lip portion 21, for example, as shown in FIG. May be in position.

  The protrusions described above are not limited to those shown in the figure, and may be provided with, for example, three or more protrusions, or may be a combination of a protrusion having a thick trapezoidal cross section and a protrusion having a mountain shape. By making the protrusion 24 into a mountain shape and reducing the contact area with the column portion 18, the hollow seal portion 23 can be separated from the column portion 18 very easily.

  The joint gaskets 16 and 26 are not provided with a bridge for connecting the upper and lower seal lip portions 21 and 22, but are provided with a bridge for connecting the upper and lower seal lip portions as in the joint gasket 28 shown in FIG. It may be.

  FIG. 8 shows another example of a joint gasket provided with a bridge. The joint gasket 31 has upper and lower seal lip portions 32 and 33 connected by a bridge 34, and both ends connected to a column portion 37. The outdoor side wall portion 36 of the hollow seal portion 35 covering the upper end of the portion is provided with a mountain-shaped protrusion 38 that contacts the column portion 37, and both ends of the hollow seal portion 35 are connected to the column portion 37. The inserts 17 of the column parts 18 and 37 can be made unnecessary by using a hard material for the column parts 18 and 37.

  In the case of this joint gasket 31, since the hollow seal portion 35 is not connected to the seal lip portion 32 but connected to the column portion 18, the seal lip portion is not involved in the separation process of the hollow seal portion 35, and the seal lip Does not hurt the part.

  The joint gaskets 16, 26, 28, 31 made of the aforementioned rubber extruded from the extruder 11 are sent to the vulcanizing device 13 and vulcanized. The vulcanizing apparatus itself is a well-known apparatus, and the present invention is not characterized by the vulcanizing apparatus or the vulcanization itself, and thus detailed description thereof is omitted.

  FIG. 9 shows a schematic configuration of the crushing device 14. The crushing device 14 includes a pair of pressers 39 fixedly arranged at a predetermined interval, and the vulcanized joint gasket 16 is passed between the pressers 39. As shown in the figure, the hollow seal portion 23 is crushed from both sides, whereby the projection 24 is pulled away from the upper end of the column portion and detached.

  A guide for guiding the joint gasket 16 is attached to the crushing device 14, that is, the vulcanizing device side of the presser 39 so that the joint gasket 16 can be easily passed through the presser 39 constituting the crushing device 14, or vulcanization of the presser foot. It is desirable that the apparatus side be a tapered guide.

  The above-described presser 39 is fixed, but the presser 39 may be configured to open and close, or at least one of them may be a roller, and may be configured to rotate in the extrusion direction. In the former case, each time the joint gasket is fed by a certain amount, the presser 39 is closed and the hollow seal portion 23 is crushed.

  Further, the crushing device 14 may also be used as a take-up machine installed in a normal extrusion process. This take-up machine is arranged so that, for example, rubber conveyors are arranged at the top and bottom, rotate in the direction in which the product is wound, and can be taken up continuously without loosening the extrudate by sandwiching the top and bottom like a vise. It is the apparatus comprised in.

The joint gaskets 16, 26, 28, and 31 of the above embodiment are formed of a rubber material that requires a vulcanization process, but may be formed of a thermoplastic material such as a thermoplastic elastomer such as TPO or TPS. In this case, a cooling device is provided instead of the vulcanizing device 13, and after the joint gasket extruded from the extruder 11 is cooled by the cooling device, the hollow seal portion 23 is crushed from both sides, and the protrusion 24 is formed at the upper end of the column portion. To be separated more. This separation may be performed while the joint gasket is not yet sufficiently cooled and warm.
As described above, a joint gasket made of a thermoplastic elastomer can be formed by appropriately changing the manufacturing process shown in FIG.

  FIG. 10 shows a state in which the joint gasket 16 shown in FIG. 5 is attached to the joint 42 between the outer wall panels 41. The joint 42 is attached to a joint (not shown) after the gasket 16 is inserted into the joint 42 to some extent. Is applied to the hollow seal portion 23, and a jig is struck with a mallet or a hammer. FIG. 11 shows a state in which the joint gasket 16 is mounted on the narrow joint 44 between the outer wall panels.

11. · Extruders 12, 16, 26, 28, 31 ·· Joint gasket 13 ·· Vulcanizing device 14 ·· Crushing device 17 ·· Insert 18/37 ·· Columns 21, 22, 32, 33 ·· Seal lip portions 23, 35 ·· Hollow seal portions 24, 27, 29, 38 ·· Projections 25, 36 · · Outdoor side wall portions 20, 34 · · Bridge 39 · · Presser 41 · · Outer wall panels 42 and 44 · · Joints

Claims (3)

  Columns 18 and 37, projecting on both sides of the columns 18 and 37, sealing lip portions 21, 22, 32 and 33 elastically contacting the outer wall panels 41 on both sides of the joints, and upper ends of the columns 18 and 37 The outer side wall portions 25 and 36 of the hollow seal portions 23 and 35 are covered with one or more protrusions 24 and 27 that protrude toward the upper end portion of the column portion on the inner side of the center portion. 29, 38, a process for producing a joint gasket made of rubber or a thermoplastic material, wherein the protrusions 24, 27, 29, 38 are extruded in a state where they are in contact with the upper end of the column part, and after the extrusion, A vulcanization process or a cooling process in which the protrusions 24, 27, 29, 38 are in contact with the upper end of the column part, or a vulcanization process or a cooling process, and after vulcanization or cooling, the hollow seal parts 23, 35 are crushed from both sides. The protrusions 24, 27, 29, 38 Preparation of joint gasket, characterized by comprising the step of separating from the section upper end.   The method for manufacturing a joint gasket according to claim 1, wherein both ends of the hollow seal portions (23, 35) are connected to the seal lip portion (21).   The method for manufacturing a joint gasket according to claim 1, wherein both ends of the hollow seal portions (23, 35) are connected to the column portions (18, 37).