JPH11257398A - Manufacture of rubber supporting body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any deformation of the bottom of fixing recesses cut in the upper and lower mounting plates of a rubber supporting body during its vulcanization-molding. SOLUTION: Vulcanization-molding, with rubber thin laminated elements 16 and 19 being respectively interposed between fixing recesses 11a and 13a made in an upper and lower mounting plates 11 and 13 and insertion projections 32a and 35a on an upper and lower die spacers 32 and 35, securely prevents any outward deformation of the thin portions of the fixing recesses 11a and 13a. The fixing recesses 11a and 13a thus fit tight, as specified, positioning projections such as shear keys on a mating member to thereby prevent backlashes between a rubber supporting body and the mating member. Unvulcanized rubber plates 17 set within a die 30 have a uniform temperature distribution that uniformly forms rubber layers constituting the rubber supporting body, which is thus allowed to have a uniform vibration isolating characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rubber bearing used for a bridge, a building or the like.

[0002]

2. Description of the Related Art As this type of rubber bearing, for example, the one shown in FIG. 1 is known. This rubber bearing 1
0 is an upper mounting plate 11 which is a metal thick plate having a fixing recess 11a at the center of the upper surface, which is opposed to and parallel to each other, and a metal thick plate having a fixing recess 13a at the center of the lower surface. A certain part mounting plate 13 is provided. Between the upper mounting plate 11 and the lower mounting plate 13, a plurality of intermediate plates 12, which are thin metal plates, are arranged in parallel with each other and at substantially equal intervals, and rubber is provided between the mounting plates 11 and 13. The rubber layer 14 is filled.

As shown in FIG. 2, the rubber bearing body 10 is mounted on a metal thick base plate 22 having a lower mounting plate 13 mounted on a pier M side, and a fixing recess 13a is formed on the base plate 22. It is fitted to a shear key 23 provided at the center. Also, the upper mounting plate 1
A metal thick sole plate 20 attached to the bridge girder N side is placed on the upper surface of the bridge 1, and a shearing key 21 provided at the center of the sole plate 20 is fitted into the fixing recess 11 a. Thereby, the rubber bearing body 10 is interposed between the pier M and the bridge girder N, and the bridge girder N due to the temperature change.
And absorb vibrations transmitted from the bridge girder N.

Conventionally, as a method of manufacturing the rubber bearing body 10, as shown in FIG. 4, first, an intermediate plate is placed between an upper mounting plate 11 and a lower mounting plate 13 which are opposed to each other and arranged in parallel. The unvulcanized rubber laminated product (molded product) 10a is formed by alternately laminating the unvulcanized rubber 12 and the rubber plate 17 that is an unvulcanized rubber. The unvulcanized rubber laminate 10a is placed on the lower mold 1 by fitting the fixing concave portion 13a of the lower mounting plate 13 to the insertion convex portion 2 thereof,
Further, the upper mold 3 is inserted into the insertion projection 4 and the upper mounting plate 11.
Of the upper mounting plate 1
By pressing the unvulcanized rubber laminate 10a from the upper mold 3 and the lower mold 1, the pressing force is applied. Thereafter, while the pressing force is applied to the unvulcanized rubber laminate 10a, heat is applied to the unvulcanized rubber laminate 10a from the mold side, whereby the unvulcanized rubber plate 17 is vulcanized and bonded. Then, the rubber bearing body 10 is formed.

[0005]

By the way, the height of the insertion projections 4 and 2 of the upper die 3 and the lower die 1 is set to be equal to both mounting plates 1.
In order to prevent an excessive load from being applied to the thin bottoms of the fixing recesses 11a and 13a of the fixing recesses 11 and 13,
It is designed to be smaller in advance than the depths of a and 13a. Therefore, gaps 11a1 and 13a1 as shown in FIGS. 4 and 5 are formed between the insertion protrusions 4 and 2 and the fixing recesses 11a and 13a of the unvulcanized rubber laminate 10a. In particular, when rubber thin plates 15 and 18 are provided on the upper surface of the upper mounting plate 11 and the lower surface of the lower mounting plate 13 as rust prevention, the gaps 11a1 and 13a1 are further increased.

Therefore, the thin bottoms of the fixing recesses 11a and 13a are not pushed from the tip surfaces of the insertion projections 4 and 2, and conversely, the rubber plate 1 from the inside of the unvulcanized rubber laminate 10a is not pressed.
By receiving the pressing force of 7, the bulges outward and deforms. As a result, when the rubber bearing body 10 is attached to a bridge or the like, the fixing recesses 11 a and 13 a are provided with the shear keys 2 of the sole plate 20 and the base plate 22.
There is a problem that a space is created on the contact surface between the rubber support 10 and the base plate 22 and the sole plate 20.

Further, the heat applied to the unvulcanized rubber laminate 10a from the mold during the vulcanization molding is applied to the gaps 11a1 and 13a1.
Therefore, smooth transfer of heat to the vicinity of the bottom of the fixing recesses 11a and 13a is hindered, and the temperature unevenness occurs partially in the rubber plate 17. Therefore, the rubber plate 17
However, there is also a problem that the rubber bearing 10 is not uniformly vulcanized and the vibration-proof characteristics of the rubber bearing body 10 become non-uniform. The present invention is intended to solve the above-described problem, and can prevent deformation of the bottoms of the fixing recesses of the upper and lower mounting plates during vulcanization molding, and can uniformly vulcanize the rubber layer. An object of the present invention is to provide a method for manufacturing a bearing body.

[0008]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the structural features of the invention described in the above-mentioned claim 1 are characterized in that the metal planks are arranged opposite to each other and parallel to each other. An upper mounting plate and a lower mounting plate, a plurality of intermediate plates which are metal thin plates disposed between the upper and lower mounting plates in parallel with the upper and lower mounting plates, and filled between the upper and lower mounting plates. And an unvulcanized rubber molded product having a fixing recess having a predetermined depth substantially at the center of the outer surface of at least one of the upper and lower mounting plates, and With a mold consisting of an upper mold and a lower mold having a parallel plane and having an insertion projection aligned with the fixing recess in the plane, sandwiching the insertion projection in the fixing recess,
And a method of manufacturing a rubber bearing body in which unvulcanized rubber is vulcanized and molded under a predetermined pressure applied to an unvulcanized rubber molded product by an upper mold and a lower mold. The vulcanization molding is performed by interposing a thin plate piece.

According to the first aspect of the present invention, the fixing recesses formed on at least one of the upper and lower mounting plates correspond to the fixing recesses on the upper and lower mold planes. Vulcanization molding is performed by interposing a rubber thin plate piece between the insertion projection provided. As a result, the pressing force of the mold is applied from the distal end surface of the insertion convex portion to the fixing concave portion through the thin rubber plate so as to be equal to other portions, so that the thin bottom portion of the fixing concave portion of the upper and lower mounting plates is formed. Deformation that expands outward can be prevented. In addition, the heat of the mold heated to vulcanize and mold the unvulcanized rubber is evenly transmitted to the bottom of the fixing recess through the rubber thin plate, and the temperature distribution of the unvulcanized rubber inside the mold is varied. And uniformed.

As a result, according to the first aspect, when the rubber bearing is used for a bridge or the like, the fixing concave portion is fitted with a positioning convex portion such as a shearing key provided on the mating member side as specified. It is possible to prevent rattling between the rubber bearing member and the mating member. Further, since the temperature distribution of the unvulcanized rubber in the mold is made uniform, the rubber layer constituting the rubber bearing is formed uniformly, and the vibration-proof characteristics of the rubber bearing can be made uniform.

According to a second aspect of the present invention, there is provided a method of manufacturing a rubber bearing according to the first aspect, wherein a thin rubber plate is provided on the outer surfaces of the upper and lower mounting plates. Another object of the present invention is to use, as a rubber thin plate piece laid in the fixing concave portion, a remaining portion formed by punching a rubber thin plate. Claim 2 as described above.
In addition to the effect of the first aspect, the invention according to the first aspect enables the production of the rubber thin plate simultaneously with the formation of the rubber thin plate, so that the labor of forming the rubber thin plate can be omitted.

According to a third aspect of the present invention, in the method of manufacturing a rubber bearing according to the first or second aspect, an adhesive is applied to the fixing recess. That is not to do. By configuring the invention according to claim 3 as described above, in addition to the effect of claim 1 or 2, the rubber thin plate piece can be easily removed from the fixing recess after vulcanization molding.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.
1 schematically illustrates a method for manufacturing the rubber bearing body 10 shown in FIG. First, as shown in FIG. 3, an intermediate plate 12 and a rubber plate 17 made of unvulcanized rubber are alternately laminated between the upper mounting plate 11 and the lower mounting plate 13. On the lower surface of the lower mounting plate 13, fixing recesses 11a are provided.
Unvulcanized rubber plates 15a, 15a,
By laminating 18a with an adhesive, an unvulcanized rubber laminate (molded product) 10a is formed. However, the rubber plates 15a and 18a can be omitted if necessary.

As shown in FIG. 3, a mold 30 used for vulcanization molding of the unvulcanized rubber laminate 10a has an upper mold 31, a middle mold 33 and a lower mold 36 which can be divided. The upper die 31 is a substantially rectangular metal flat box type,
An upper die spacer 32 having a flat plate-shaped insertion projection 32a protruding downward at the center of the lower surface is mounted and fixed in 1a. The insertion projection 32a is provided at a position corresponding to the fixing recess 11a of the upper mounting plate 11.

The lower die 36 is an approximately square metal flat box type. In the concave portion 36a of the lower die 36, a middle die 33, which is a rectangular metal frame, is placed with its lower portion in close contact with the side wall of the concave portion 36a. Furthermore, a middle spacer 34, which is a square frame having the same height as the middle die 33, is provided in close contact with the inner surface of the middle die 33. And the recess 3
On the bottom surface of 6a, a plate-shaped lower spacer 35 is placed in close contact with the inner surface of the middle spacer 34. The lower spacer 35 has an insertion projection 35a corresponding to the fixing recess 13a of the lower mounting plate 13 projecting to the center of the upper surface.
have.

The unvulcanized rubber laminate 1 is enclosed inside the middle spacer 34 and the lower spacer 35.
0a is fitted by fitting the fixing concave portion 13a of the lower mounting plate 13 to the insertion convex portion 35a of the lower die spacer 35. Here, the thin rubber piece 19 is placed on the upper side surface of the insertion convex portion 35a in advance. As the rubber thin plate piece 19, it is possible to use a punching remaining portion formed by punching when forming the unvulcanized rubber thin plate 18a, so that it is convenient because there is no need to prepare a separate piece.

On the upper surface side of the unvulcanized rubber laminate 10a, a rubber thin plate piece 16 is placed on the bottom surface of the fixing concave portion 11a which has not been subjected to an adhesive treatment. The formation of the rubber thin plate 16 is the same as the formation of the rubber thin plate 19 described above.

After mounting the unvulcanized rubber laminate 10a inside the lower mold 36 and the middle mold 33, the upper mold 31 is
The two insertion projections 32a are fitted into the fixing recesses 11a of the upper mounting plate 11 and are mold-matched, and a pressing force is applied to the unvulcanized rubber laminate 10a by the upper mold 31 and the lower mold 36. Here, the fixing concave portion 11a bottom surface and the insertion convex portion 32a
A rubber thin plate 16 is interposed between the fixing recess 13 and the fixing recess 13.
a Since the rubber thin plate piece 19 is interposed between the bottom surface and the insertion convex portion 35a, the pressing force of the upper die 31 and the lower die 36 is
The same applies to the thin bottoms of the fixing recesses 11a and 13a as well as other portions.

In the mold 30, the unvulcanized rubber laminate 10a is pressed by the upper mold 31 and the lower mold 36, and the mold 30 is heated so that the unvulcanized rubber is passed through the mold 30. Heat is transmitted to the laminate 10a. Here, a rubber thin plate piece 16 is interposed between the bottom surface of the fixing concave portion 11a and the insertion convex portion 32a, and a rubber thin plate piece 19 is interposed between the bottom surface of the fixing concave portion 13a and the insertion convex portion 35a. Therefore, the heat from the mold 30 is transferred to the fixing recesses 11a, 13a.
Also in a, the temperature distribution of the unvulcanized rubber plate 17 in the inside is uniformed as well as in the other parts. Thus, the rubber thin plates 15 and 18 and the rubber plate 17 are vulcanized and formed to form the rubber bearing body 10 having the rubber layer 14. After vulcanization molding, the rubber bearing body 10 is taken out of the mold 30 and the rubber thin plate pieces 16 and 19 are removed. However, since the fixing recesses 11a and 13a have not been subjected to the adhesive treatment, the rubber thin plate pieces 16 and 19 are not provided. Is easily removed.

As described above, in the present embodiment, the fixing recesses 11a of the mounting plates 11, 13 are provided.
13a and the rubber thin plate pieces 16 and 19 are interposed between the insertion projections 32a and 35a of the upper die spacer 32 and the lower die spacer 35, and vulcanization molding is performed.
The outward deformation of the thin bottom portion 3a can be reliably prevented. As a result, when the rubber bearing body 10 is used for a bridge or the like, the fixing recesses 11a and 13a can be engaged with positioning projections such as shear keys provided on the mating member side as specified. It is possible to prevent rattling between the support body 10 and the mating member. Further, by making the temperature distribution of the unvulcanized rubber plate 17 inside the mold 30 uniform, the rubber layer 14 constituting the rubber bearing body 10 is formed uniformly, and the rubber bearing body 10 is formed.
Can be made uniform.

In the above embodiment, the formation of the unvulcanized rubber molded product 10a is performed by laminating a metal plate and an unvulcanized rubber plate. The rubber layer may be formed by injection molding. Further, the specific structure of the rubber bearing body 10 shown in the above embodiment is not limited to this.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a rubber bearing according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view schematically showing a state where the rubber bearing body is attached to a bridge.

FIG. 3 is a sectional view showing a state in which an unvulcanized rubber laminate is mounted on a mold.

FIG. 4 is a partial cross-sectional view showing a main part of a process of manufacturing a rubber bearing according to a conventional example.

FIG. 5 is a sectional view showing a main part of a conventional example in which an unvulcanized rubber laminate is mounted on a mold.

[Explanation of symbols]

10: rubber bearing body, 10a: unvulcanized rubber laminate (molded product), 11: upper mounting plate, 11a: fixing recess,
12: Intermediate plate, 13: Lower mounting plate, 13a
... fixing recess, 14 ... rubber layer, 15 ... rubber thin plate, 16 ...
Rubber thin plate piece, 17: rubber plate, 18: rubber thin plate, 19: rubber thin plate piece, 30: mold, 31: upper die, 32: upper die spacer, 32a: insertion convex portion, 33: middle die, 34: middle die spacer , 35 ... lower mold spacer, 35a ... insertion convex part, 36 ... lower mold, 36a ... concave part.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16F 15/08 F16F 15/08 D

Claims (3)

[Claims] 1. An upper mounting plate and a lower mounting plate, which are metal thick plates facing each other and parallel to each other, and disposed between and parallel to the upper and lower mounting plates. A plurality of intermediate plates, each of which is a thin metal plate, and unvulcanized rubber filled between the upper and lower mounting plates, and a predetermined center is provided substantially at the center of the outer surface of at least one of the upper and lower mounting plates. An unvulcanized rubber molded product provided with a fixing recess of a depth,
In a state in which the insertion convex portion is inserted into the fixing concave portion by a mold having an upper die and a lower die having mutually facing and parallel flat surfaces and having an insertion convex portion corresponding to the fixing concave portion on the flat surface. A method of manufacturing a rubber bearing body for clamping and performing vulcanization molding of the unvulcanized rubber while applying a predetermined pressure to the unvulcanized rubber molded product by the upper mold and the lower mold, wherein: A method for producing a rubber bearing, wherein vulcanization molding is performed by interposing a thin rubber plate between the insertion convex portion. 2. The method according to claim 1, wherein a rubber thin plate is provided on outer surfaces of the upper and lower mounting plates, and the rubber thin plate piece laid in the fixing recess is provided. A method for producing a rubber bearing body, comprising using a remaining portion formed by punching a thin rubber plate. 3. The method of manufacturing a rubber bearing according to claim 1, wherein an adhesive is not applied to the fixing recess.