JP4631504B2 - Mold for vulcanization of laminated rubber structure and method for producing laminated rubber structure - Google Patents

Description

  The present invention relates to a vulcanization mold for a laminated rubber structure used for supporting a structure such as a bridge or a building, and a method for producing the laminated rubber structure.

Generally, this type of laminated rubber structure is molded by alternately laminating a plurality of unvulcanized rubber members and intermediate plates in a vulcanizing mold in the vertical direction. In addition, if each intermediate plate is displaced in the horizontal direction in the vulcanizing mold, the intermediate plates are displaced in the horizontal direction, thereby reducing the seismic isolation performance such as vertical rigidity and horizontal rigidity. Since the intermediate plate is exposed from the vulcanized rubber and is not preferable in appearance, a positioning hole is provided in each intermediate plate and a positioning shaft formed so as to extend in the vertical direction is inserted into each intermediate plate. It is known that the plate is not displaced in the horizontal direction (for example, see Patent Document 1).
JP-A-10-115344

  By the way, in the said manufacturing method, when each unvulcanized rubber member and each intermediate board are arrange | positioned in a vulcanization metal mold | die and a vulcanization metal mold | die is pressurized from the upper direction, the unvulcanized | cured material in a vulcanization metal mold | die. Since the rubber member flows from the inner side to the outer side in the horizontal direction and flows upward or downward in the outer side in the horizontal direction, a large force is applied to the intermediate plate in the upward or downward direction. Deformation of the plate occurs. For this reason, there is a problem in that the vertical interval between the intermediate plates is not a predetermined interval, which is not preferable in appearance.

  The present invention has been made in view of the above problems, and the object of the present invention is that each intermediate plate is not displaced in the direction perpendicular to the stacking direction, and the pressurization of the vulcanizing mold is performed. Another object of the present invention is to provide a vulcanization mold for a laminated rubber structure and a method for producing the laminated rubber structure in which the interval in the lamination direction of each intermediate plate does not change due to the flow of the unvulcanized rubber member.

  In order to achieve the above object, the present invention manufactures a laminated rubber structure in which a plurality of unvulcanized rubber members and intermediate plates are alternately laminated, and end face plates are arranged at both ends in the laminating direction and vulcanized and molded. The vulcanizing mold used in the present invention includes a pair of positioning shafts that can be inserted from the one and the other in the stacking direction into the positioning holes that are respectively provided in the intermediate plates and arranged in the stacking direction, and at least one of the positioning shafts. The outer shape is gradually reduced from the outer side in the stacking direction toward the inner side in the stacking direction.

  Thereby, since the positioning shaft is inserted into each positioning hole from one side and the other in the stacking direction, each intermediate plate does not shift in the direction orthogonal to the stacking direction. In addition, each positioning shaft is formed so that the outer shape gradually decreases from the outer side in the stacking direction toward the inner side in the stacking direction. By positioning in the vulcanization mold so as to be arranged in order from the largest of each, each positioning hole is locked to the outer portion of the positioning shaft having an outer shape equivalent to the inner shape from the inside in the stacking direction, Each intermediate plate is restricted from moving outward in the stacking direction from the locking position where the positioning hole locks with the positioning shaft.

Further, the present invention provides a vulcanizing material for use in the production of a laminated rubber structure in which a plurality of unvulcanized rubber members and intermediate plates are alternately laminated, and end face plates are respectively arranged at both ends in the laminating direction and vulcanized and molded. The mold includes a positioning shaft that is provided in each intermediate plate and can be inserted into the positioning holes arranged in the stacking direction in the stacking direction, and at least a part of the intermediate plate is engaged with the positioning shaft from only one in the stacking direction. only set the stop possible engagement portion, the positioning shaft is retractable formed in the radial direction, and lockable locking member on one side stacking direction of the intermediate plate by radially outwardly projecting And a biasing member that biases the locking member toward the radially outer side of the positioning shaft, and when the locking member is inserted into the positioning hole of the intermediate plate from the other side in the stacking direction, the biasing member It is formed so as against the biasing force to move radially inward of the positioning shaft.

  Thereby, since the positioning shaft passes through each positioning hole in the stacking direction, each intermediate plate does not shift in the direction orthogonal to the stacking direction. In addition, since the positioning shaft is provided with a locking portion that can be locked to only at least one of the intermediate plates from one side in the stacking direction, the locking portion of the positioning shaft is at least part of the intermediate plate. By disposing each intermediate plate in the vulcanizing mold so as to be locked to the intermediate plate, the movement of the intermediate plate locked by the positioning shaft in one of the stacking directions from the locking position is restricted. Further, since the flow state of the unvulcanized rubber member in the vulcanizing mold is changed by restricting the movement of some of the intermediate plates in the laminating direction, the intermediate plate is not laminated by the positioning shaft. Movement in the direction is also suppressed.

  In addition, the present invention provides a laminated rubber structure by alternately laminating a plurality of unvulcanized rubber members and intermediate plates, and arranging end face plates at both ends in the laminating direction and vulcanizing them in a vulcanizing mold. In the method for manufacturing a laminated rubber structure for molding a body, the positioning holes provided in each of the intermediate plates and arranged in the laminating direction are formed so as to be respectively insertable from one and the other in the laminating direction, and at least a part thereof Each intermediate plate has a positioning hole from the outer side in the stacking direction to the inner side in the stacking direction in a vulcanizing mold having a pair of positioning shafts formed so that the outer shape gradually decreases from the outer side in the stacking direction toward the inner side in the stacking direction. Are arranged so as to be arranged in order from the largest inner shape toward the surface, and vulcanized.

  Thereby, since the positioning shaft is inserted into each positioning hole from one side and the other in the stacking direction, each intermediate plate does not shift in the direction orthogonal to the stacking direction. In addition, each positioning hole is sequentially arranged from the inner side in the stacking direction to the inner side in the stacking direction, and the outer shape of each positioning shaft gradually decreases from the outer side in the stacking direction toward the inner side in the stacking direction. Each positioning hole is locked from the inside in the stacking direction to the outer shape of the positioning shaft having the same outer shape as the inner shape, and each intermediate plate is locked so that the positioning hole is locked to the positioning shaft. Movement outside the stacking direction from the position is restricted.

In addition, the present invention provides a laminated rubber structure by alternately laminating a plurality of unvulcanized rubber members and intermediate plates, and arranging end face plates at both ends in the laminating direction and vulcanizing them in a vulcanizing mold. In the method for manufacturing a laminated rubber structure for molding a body, the intermediate rubber plates are formed so as to be inserted in positioning layers provided in the respective intermediate plates and arranged in the stacking direction, and are stacked on at least some of the intermediate plates. Each intermediate plate is placed in a vulcanization mold having a positioning shaft having a locking portion that can be locked only from one direction so that the locking portion of the positioning shaft is locked to at least a portion of the intermediate plate. It is arranged and vulcanized , and the locking part of the positioning shaft is formed so as to be able to protrude and retract in the radial direction, and can be locked to one surface in the stacking direction of the intermediate plate by protruding outward in the radial direction With a locking member A biasing member that biases the locking member toward the radially outer side of the positioning shaft, and the locking member biases when the positioning shaft is inserted into the positioning hole of the intermediate plate from the other side in the stacking direction. It is formed so as to move inward in the radial direction of the positioning shaft against the biasing force of the member .

  Thereby, since the positioning shaft passes through each positioning hole in the stacking direction, each intermediate plate does not shift in the direction orthogonal to the stacking direction. In addition, since the positioning shaft is provided with a locking portion that can be locked to at least a part of the intermediate plate from only one side in the stacking direction, the intermediate plate locked by the positioning shaft is positioned in the stacking direction more than the locking position. Movement to one side is restricted. Further, since the flow state of the unvulcanized rubber member in the vulcanizing mold is changed by restricting the movement of some of the intermediate plates in the laminating direction, the intermediate plate is not laminated by the positioning shaft. Movement in the direction is also suppressed.

  According to the present invention, each intermediate plate is not displaced in the direction orthogonal to the stacking direction, and the intermediate plate that is locked to the positioning shaft is moved in a predetermined stacking direction from the locking position. Since the regulation is restricted, even if a force in the stacking direction is applied to the intermediate plate due to the flow of the unvulcanized rubber member accompanying the pressurization of the vulcanizing mold, each intermediate plate may be displaced or deformed in the stacking direction. Therefore, it is possible to prevent the interval between the intermediate plates in the stacking direction from being changed by the flow of the unvulcanized rubber member. That is, it is extremely advantageous in that the intermediate plate can be vulcanized and molded so that the interval in the stacking direction is always a predetermined interval, and a desired appearance can be obtained with certainty.

  1 to 4 show a first embodiment of the present invention. FIG. 1 is a plan view of a mold for vulcanization during vulcanization molding, and FIG. 2 is a sectional view taken along line AA in FIG. 3 is a side sectional view showing a state in which each intermediate plate, each end face plate and each unvulcanized rubber member are arranged in the vulcanizing mold, and FIG. 4 is a diagram showing a vulcanizing mold for the laminated rubber structure after vulcanization molding. FIG.

  As shown in FIG. 3, the laminated rubber structure manufacturing method of the present invention includes a plurality of unvulcanized rubber members 20, two first intermediate plates 30, and one second plate in a vulcanizing mold 10. The intermediate rubber plates 31 are alternately laminated, and the lower end face plate 32 and the upper end face plate 33 are arranged at both ends in the lamination direction, and then the vulcanizing mold 10 is pressurized and heated to form a laminated rubber structure. It is to be molded.

  The vulcanizing mold 10 includes a lower mold 11, an upper mold 12, an intermediate mold 13, four upper shafts 14 and four lower shafts as positioning shafts arranged in the vulcanizing mold 10. 15.

  The lower mold 11 is formed in a rectangular plate shape, and is provided with a protruding portion 11a extending upward over the entire circumference on the outer peripheral portion of the upper surface. An inclined surface 11b is formed on the inner peripheral surface of the protruding portion 11a. The inclined surface 11b is gradually inclined outward.

  The upper mold 12 is formed in a rectangular plate shape, and a protruding portion 12a extending downward is provided on the outer peripheral portion of the lower surface over the entire periphery. In addition, an inclined surface 12b is formed on the inner peripheral surface of the projecting portion 12a. Further, a positioning hole 12c is provided on the lower surface of the upper mold 12 at a position corresponding to each through hole 30a of each first intermediate plate 30 described later, and the upper end portion of the upper shaft 14 is inserted into each positioning hole 12c. It has come to be.

  The middle mold 13 includes a pair of middle mold members 13a that can be divided in the width direction, and each middle mold member 13a is formed in a U-shaped horizontal cross section. In addition, an inclined surface 13b that is gradually inclined inward toward the upper side is formed on the outer peripheral surface of the upper end portion of each intermediate member 13a, and is gradually decreased downward on the outer peripheral surface of the lower end portion of each intermediate member 13a. An inclined surface 13c that is inclined inward is formed.

  Each upper shaft 14 is formed in a columnar shape, and a tapered portion 14a whose outer diameter gradually decreases downward is provided on the lower end side. Further, a chamfered portion 14b is formed on the outer peripheral surface of the upper end portion of each upper shaft 14 over the entire circumference.

  Each lower shaft 15 is formed in a columnar shape, and a tapered portion 15a whose outer diameter gradually decreases upward is provided on the upper end side. Further, a screw portion 15 b is provided on the outer peripheral surface on the lower end side of each lower shaft 15. Further, the shape of the tapered portion 15 a of each lower shaft 15 is formed to be equal to the shape of the tapered portion 14 a of each upper shaft 14. Further, the shafts 14 and 15 are configured such that their tip portions are in contact with each other in the vertical direction within the vulcanizing mold 10.

  The unvulcanized rubber member 20 is formed in a rectangular sheet shape, and through holes 20a penetrating in the vertical direction are provided at positions corresponding to the through holes 30a of the first intermediate plate 30 described later at the four corners.

  Each first intermediate plate 30 is made of a steel material, is formed in a rectangular plate shape, and is provided with through holes 30a as positioning holes penetrating in the vertical direction in the vicinity of the four corners. Each through hole 30a has an inner diameter equal to the outer diameter of the substantially central portion in the vertical direction of the tapered portions 14a, 15a of the shafts 14, 15. Further, an adhesive for vulcanizing and bonding the unvulcanized rubber member 20 is applied to the upper and lower surfaces of each first intermediate plate 30.

  The second intermediate plate 31 is made of a steel material, is formed in a rectangular plate shape, and has through holes 31a as positioning holes penetrating in the vertical direction in the vicinity of the four corners. Further, each through hole 31a is provided at a position corresponding to each through hole 30a of the first intermediate plate 30, and each through hole 31a is equal to the outer diameter of the tip end portion of the tapered portions 14a, 15a of the shafts 14, 15. It is formed on the inner diameter. Further, an adhesive for vulcanizing and bonding the unvulcanized rubber member 20 is applied to the upper surface and the lower surface of each second intermediate plate 31.

  The lower end face plate 32 is made of a steel material, is formed in a rectangular plate shape thicker than the intermediate plates 30 and 31, and is provided with screw holes 32a penetrating in the vertical direction in the vicinity of the four corners. Each screw hole 32 a is provided at a position corresponding to each through hole 30 a of the first intermediate plate 30, and an adhesive for vulcanizing and bonding the unvulcanized rubber member 20 to the upper surface side of the lower end face plate 32. The agent is applied.

  The upper end face plate 33 is made of a steel material, is formed in a rectangular plate shape thicker than the intermediate plates 30 and 31, and is provided with through holes 33a penetrating in the vertical direction in the vicinity of the four corners. Each through hole 33 a is provided at a position corresponding to each through hole 30 a of the first intermediate plate 30, and an adhesive for vulcanizing and bonding the unvulcanized rubber member 20 to the lower surface side of the upper end face plate 33. Is applied.

  Here, the manufacturing method of the laminated rubber structure of this embodiment is demonstrated. First, as shown in FIG. 3, the lower shaft 15 is screwed into each screw hole 32 a of the lower end face plate 32, and the lower end face plate 32 is placed on the lower die 11 to which the middle die 13 is attached. Next, the second intermediate plate 31 is disposed between the first intermediate plates 30, and the unvulcanized rubber member 20 is disposed on the upper surface side and the lower surface side of each first intermediate plate 30. , 31 and each unvulcanized rubber member 20 are placed in a vulcanizing mold 10. At this time, each lower shaft 15 is inserted through each through hole 30a, 31a, 20a. Subsequently, the upper end face plate 33 is placed on the upper surface, and the upper shafts 14 are inserted into the respective through holes 33a of the upper end face plate 33 from above so that the upper shafts 14 are inserted into the positioning holes 12c. The upper mold 12 is placed.

  In this state, when the vulcanizing mold 10 is heated while being pressurized from above by a vulcanizing press (not shown), the unvulcanized rubber member 20 flows from the inner side to the outer side in the horizontal direction as shown in FIG. Flows upward or downward on the outside in the direction.

  Here, since the upper shaft 14 and the lower shaft 15 are inserted into the through holes 30a and 31a of the intermediate plates 30 and 31, respectively, the intermediate plates 30 and 31 are positioned in a direction orthogonal to the stacking direction. There will be no deviation.

  In addition, each through hole 30a of each first intermediate plate 30 is formed to have an inner diameter equal to the outer diameter of the substantially central portion in the vertical direction of the tapered portions 14a and 15a of the shafts 14 and 15, and each through hole of the second intermediate plate 31 is formed. Since the hole 31a is formed to have an inner diameter equal to the outer diameter of the tip of the tapered portions 14a, 15a of the shafts 14, 15, the through holes 30a, 31a of the intermediate plates 30, 31 are formed of the tapered portions 14a, 15a. And the movement to the outside in the stacking direction is restricted from the locking position for locking in the stacking direction.

  Subsequently, as shown in FIG. 4, after pressurizing and heating for a predetermined time, the lower mold 11, the upper mold 12 and the middle mold 13 are moved away from each other, and each upper shaft 14 is pulled out and lowered. The laminated rubber structure is released by pulling the side shaft 15 downward. At this time, since each lower shaft 15 is detachably screwed to the lower end face plate 32, each lower shaft 15 does not fall when the lower mold 11 is separated from the laminated rubber structure, and each lower shaft 15 does not fall. It becomes easy to pull out the side shaft 15. In the laminated rubber structure manufactured in this way, a plurality of holes whose inner diameters gradually decrease from the outer side in the laminating direction toward the inner side in the laminating direction are formed inside.

  Thus, according to the present embodiment, the upper shaft 14 and the lower shaft 15 are inserted into the through holes 30a and 31a of the intermediate plates 30 and 31, respectively, and the intermediate plates 30 and 31 are orthogonal to the stacking direction. Therefore, the intermediate plates 30 and 31 can be prevented from being exposed from the vulcanized rubber, and a desired appearance can be obtained with certainty.

  Further, since the intermediate plates 30 and 31 are restricted from moving outward in the stacking direction from the locking positions where the through holes 30a and 31a are locked in the stacking direction with the tapered portions 14a and 15a, the vulcanizing gold Even when a force in the stacking direction is applied to each of the intermediate plates 30 and 31 by the unvulcanized rubber member 20 that flows when the mold 10 is pressed, the intermediate plates 30 and 31 may be displaced or deformed in the stacking direction. In addition, the interval in the stacking direction of the intermediate plates 30 and 31 can be prevented from changing due to the flow of the unvulcanized rubber member 20. That is, it is extremely advantageous in that the intermediate plates 30 and 31 can be vulcanized and molded so that the interval in the stacking direction is always a predetermined interval, and a desired appearance can be obtained with certainty.

  Furthermore, since each lower shaft 15 is detachably screwed to the lower end face plate 32, each lower shaft 15 can be prevented from dropping when the laminated rubber structure is released from the lower mold 11, The release operation of the laminated rubber structure can be performed easily and reliably.

  Further, since the through holes 30a and 31a are provided in the vicinity of the four corners of the intermediate plates 30 and 31, the intermediate plates 30 and 31 that are likely to be displaced or deformed in the stacking direction due to the flow of the unvulcanized rubber member 20. The movement of the four corners of the intermediate plates 30 and 31 can be restricted, which is extremely advantageous in maintaining the intervals in the stacking direction of the intermediate plates 30 and 31 at predetermined intervals.

  In the present embodiment, the through holes 30a and 31a are formed in a circular shape and the shafts 14 and 15 are formed in a cylindrical shape. However, the through holes 30a and 31a are formed in a polygonal shape. In addition, the shafts 14 and 15 may be formed in a polygonal column shape that can be inserted through the through holes 30a and 31a.

  FIG. 5 is a side sectional view of a vulcanization mold during vulcanization molding showing a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected and shown to the component equivalent to 1st Embodiment.

  As shown in FIG. 5, the method for producing a laminated rubber structure of the present invention includes a plurality of unvulcanized rubber members 20, a first intermediate plate 50, a second intermediate plate 51, and a third in a vulcanizing mold 40. The intermediate plates 52 are alternately stacked, and the lower end plate 53 and the upper end plate 33 similar to those of the first embodiment are disposed at both ends in the stacking direction, and then the vulcanizing mold 40 is pressurized and heated. By doing so, a laminated rubber structure is molded.

  The vulcanizing mold 40 includes a lower mold 41, four shafts 42 as positioning shafts arranged in the vulcanizing mold 10, an upper mold 12 and a middle mold 13 similar to those in the first embodiment. It is composed of

  The lower die 41 is formed in a rectangular plate shape, and is provided with a protruding portion 41a extending upward over the entire circumference on the outer periphery of the upper surface. Further, an inclined surface 41b is formed on the inner peripheral surface of the protruding portion 41a. The inclined surface 41b is gradually inclined outward. Further, positioning holes 41c are provided on the upper surface of the lower die 41 at positions corresponding to through holes 50a of the first intermediate plate 50 described later, and the lower end portions of the shafts 42 are inserted into the positioning holes 41c, respectively. It is like that.

  Each shaft 42 is formed in a columnar shape, and a tapered portion 42a having an outer diameter that gradually decreases downward is provided at a central portion in the vertical direction. Further, a chamfered portion 42b is formed on the outer peripheral surface of the upper end portion of each shaft 42 over the entire periphery, and a chamfered portion 42c is formed on the outer peripheral surface of the lower end portion over the entire periphery.

  Each of the intermediate plates 50, 51, 52 is made of a steel material and is formed in a rectangular plate shape, and through holes 50a, 51a, 52a as positioning holes penetrating in the vertical direction are provided in the vicinity of the four corners. Yes. Each through hole 50a of the first intermediate plate 50 is formed to have an inner diameter equal to the outer diameter on the lower end side of the tapered portion 42a of the shaft 42, and each through hole 51a of the second intermediate plate 51 is in the vertical direction of the tapered portion 42a of the shaft 42. The inner diameter is substantially equal to the outer diameter of the central portion. Further, each through hole 52 a of the third intermediate plate 52 is formed with an inner diameter equal to the outer diameter on the upper end side of the tapered portion 42 a of the shaft 42. Further, an adhesive for vulcanizing and bonding to the unvulcanized rubber member 20 is applied to the upper surface and the lower surface of each intermediate plate 50, 51, 52.

  The lower end face plate 53 is made of a steel material, is formed in a rectangular plate shape thicker than the intermediate plates 50, 51, 52, and has through holes 53a penetrating vertically in the vicinity of the four corners. . Each through hole 53 a is provided at a position corresponding to each through hole 50 a of the first intermediate plate 50, and an adhesive for vulcanizing and bonding the unvulcanized rubber member 20 to the upper surface side of the lower end face plate 53. The agent is applied.

  Here, the manufacturing method of the laminated rubber structure of the present embodiment vulcanizes each unvulcanized rubber member 20, each intermediate plate 50, 51, 52 and each end face plate 33, 53 as in the first embodiment. While arrange | positioning in the metal mold | die 40, after inserting the shaft 42 from upper direction in each through-hole 33a of the upper side end surface plate 33, the upper mold | type 12 is mounted.

  In this state, when the vulcanizing mold 40 is heated while being pressurized from above by a vulcanizing press (not shown), the unvulcanized rubber member 20 flows from the horizontal inner side to the outer side as shown in FIG. Flows upward on the outside in the direction.

  Here, since the shafts 42 are inserted into the through holes 50a, 51a, 52a of the intermediate plates 50, 51, 52, the intermediate plates 50, 51, 52 are positioned in a direction orthogonal to the stacking direction. There will be no deviation.

  Each through hole 50a of the first intermediate plate 50 is formed to have an inner diameter equal to the outer diameter on the lower end side of the tapered portion 42a of the shaft 42, and each through hole 51a of the second intermediate plate 51 is formed of the tapered portion of the shaft 42. 42a is formed with an inner diameter equal to the outer diameter of the substantially central portion in the vertical direction, and each through hole 52a of the third intermediate plate 52 is formed with an inner diameter equal to the outer diameter on the upper end side of the tapered portion 42a of the shaft 42. For this reason, the intermediate plates 50, 51, 52 are restricted from moving upward from the positions where the through holes 50a, 51a, 52a are engaged with the tapered portions 42a in the stacking direction.

  Thus, according to the present embodiment, each of the intermediate plates 50, 51, 52 moves upward from the locking position where each of the through holes 50a, 51a, 52a locks with each tapered portion 42a in the stacking direction. Therefore, even when an upward force is applied to the intermediate plates 50, 51, 52 by the unvulcanized rubber member 20 that flows by pressurization of the vulcanizing mold 40, the intermediate plates 50, 51, 52 are It is possible to prevent the intermediate plate 50, 51, 52 from changing in the stacking direction due to the flow of the unvulcanized rubber member 20 without causing any positional shift or deformation in the stacking direction. That is, it is extremely advantageous in that the intermediate plates 50, 51, 52 can be vulcanized and molded so that the interval in the stacking direction is always a predetermined interval, and a desired appearance can be obtained with certainty.

  FIGS. 6 to 7 show a third embodiment of the present invention. FIG. 6 is a side sectional view of a vulcanization mold during vulcanization molding, and FIG. In addition, the same code | symbol is attached | subjected and shown to the component equivalent to 2nd Embodiment.

  As shown in FIG. 6, the method for producing a laminated rubber structure of the present invention alternately laminates a plurality of unvulcanized rubber members 20 and a plurality of intermediate plates 70 in a vulcanizing mold 60, After the end face plates 53 and 33 similar to those of the second embodiment are disposed at both ends in the laminating direction, the laminated rubber structure is molded by pressurizing and heating the vulcanizing mold 60.

  The vulcanizing mold 60 includes a lower mold 41, an upper mold 12 and an intermediate mold 13 similar to those in the second embodiment, and four shafts 61 serving as positioning shafts disposed in the vulcanizing mold 60. It is configured.

  Each shaft 61 is formed in a columnar shape, and is provided with a pair of locking members 61a at two locations spaced apart from each other in the vertical direction. Each locking member 61 a is disposed in a concave portion 61 b provided on the shaft 61, and an upper end portion is attached to the shaft 61 by an attachment pin 61 c and is rotated in the radial direction of the shaft 61. Further, a spring 61d as an urging member is attached to the lower end portion side of each locking member 61a, and the locking member 61a is urged radially outward of the shaft 61 by the spring 61d. That is, when the shaft 61 is inserted into a through-hole 70a of the intermediate plate 70 described later from below, the locking member 61a engages with the through-hole 70a, thereby resisting the biasing force of the spring 61d and moving the shaft 61 radially inward. Rotate, immerse in the recessed portion 61b and pass through the through hole 70a. Further, after passing through the through hole 70a, the locking member 61a is rotated radially outward of the shaft 61 by the urging force of the spring 61d, and the locking member 61a protrudes out of the concave portion 61b to be on the upper surface of the intermediate plate 70. It is designed to be locked.

  Each intermediate plate 70 is made of a steel material and is formed in a rectangular plate shape. Further, through holes 70 a as positioning holes penetrating in the vertical direction are provided in the vicinity of the four corners of the intermediate plate 70, and the through holes 70 a are formed with an inner diameter slightly larger than the outer diameter of the shaft 61.

  Here, the manufacturing method of the laminated rubber structure of the present embodiment is similar to the second embodiment in that each of the unvulcanized rubber member 20, the intermediate plate 70, and the through holes 70 a and 33 a of the end face plates 33 and 53. 53a, the shaft 61 is inserted from below and placed in the vulcanizing mold 60, and then the upper mold 12 is placed.

  In this state, when the vulcanizing mold 60 is heated while being pressurized from above by a vulcanizing press (not shown), the unvulcanized rubber member 20 flows from the horizontal inner side to the outer side as shown in FIG. Flows upward on the outside in the direction.

  Here, since the shaft 61 is inserted in each through hole 70a of each intermediate plate 70, each intermediate plate 70 is not displaced in the direction orthogonal to the stacking direction.

  Further, since each locking member 61a of each shaft 61 is locked to the upper surface of each intermediate plate 70 in the vicinity of each through hole 70a, the intermediate plate 70 locked to the locking member 61a is in its locked position. The upward movement is restricted. Further, when the shaft 61 is extracted upward after vulcanization molding, each locking member 61a engages with each of the through holes 70a and 33a and rotates inward in the radial direction of the shaft 61. Can be easily removed from the laminated rubber structure after vulcanization molding.

  As described above, according to the present embodiment, since some of the intermediate plates 70 are restricted from moving upward by the locking members 61 a of the shafts 61, the intermediate plates 70 flow by pressurization of the vulcanizing mold 60. Even when an upward force is applied to each intermediate plate 70 by the unvulcanized rubber member 20, the intermediate plate 70 that is locked by each locking member 61a is not displaced or deformed in the stacking direction. Further, by restricting the displacement and deformation of some intermediate plates 70 in the stacking direction, the flow state of the unvulcanized rubber member 20 in the vulcanizing mold 60 changes, and the other intermediate plates 70 are changed. It is possible to suppress displacement and deformation in the stacking direction. That is, it is extremely advantageous in that the intermediate plate 70 can be vulcanized and molded so that the interval in the stacking direction is always a predetermined interval, and a desired appearance can be obtained with certainty.

  In this embodiment, the shaft 61 is provided with the locking member 61a urged radially outward by the spring 61d. However, the upper end is fixed to the outer peripheral surface of the shaft 61 and the lower end. Protrudes outward in the radial direction of the shaft 61, and when the shaft 61 is inserted into the through hole 70 a from below, a lower end portion is elastically deformed radially inward of the shaft 61 and a locking member for locking to the upper surface of the intermediate plate 70 is provided. It is also possible.

The top view of the metal mold | die for vulcanization | cure in the vulcanization molding which shows 1st Embodiment in this invention AA line sectional view in FIG. Side surface sectional view showing a state in which each intermediate plate, each end face plate and each unvulcanized rubber member are disposed in the vulcanization mold Side sectional view showing a state in which the laminated rubber structure is released from the vulcanization mold after vulcanization molding Side sectional view of a vulcanization mold during vulcanization molding showing a second embodiment of the present invention Side surface sectional view of a mold for vulcanization during vulcanization molding according to a third embodiment of the present invention Cross section of the main part of the shaft

DESCRIPTION OF SYMBOLS 10 ... Mold for vulcanization, 11 ... Lower mold, 12 ... Upper mold, 12c ... Positioning hole, 13 ... Middle mold, 14 ... Upper shaft, 14a ... Tapered part, 15 ... Lower shaft, 15a ... Tapered part, 15b ... Screw part, 20 ... Unvulcanized rubber member, 30 ... first intermediate plate, 30a ... through hole, 31 ... second intermediate plate, 31a ... through hole, 32 ... lower end face plate, 32a ... screw hole, 33 ... upper side End plate, 33a ... through hole, 40 ... vulcanizing mold, 41 ... lower die, 41c ... positioning hole, 42 ... shaft, 42a ... tapered portion, 50 ... first intermediate plate, 50a ... through hole, 51 ... first 2 intermediate plate, 51a ... through hole, 52 ... third intermediate plate, 52a ... through hole, 53 ... lower end face plate, 53a ... through hole, 60 ... vulcanizing mold, 61 ... shaft, 61a ... locking member , 61d ... spring, 70 ... intermediate plate, 70a ... through hole.

Claims (5)

In a vulcanization mold used for manufacturing a laminated rubber structure in which a plurality of unvulcanized rubber members and intermediate plates are alternately laminated, and end face plates are arranged at both ends in the lamination direction and vulcanized and molded,
A pair of positioning shafts that can be inserted from the one and the other in the stacking direction into the positioning holes provided in each of the intermediate plates and arranged in the stacking direction,
A vulcanization mold for a laminated rubber structure, characterized in that at least a part of each positioning shaft is formed such that the outer shape gradually decreases from the outer side in the laminating direction toward the inner side in the laminating direction. The vulcanization mold for a laminated rubber structure according to claim 1, wherein a positioning shaft on one end side in the stacking direction of each positioning shaft is detachably formed on an end face plate on one end side in the stacking direction. In a vulcanization mold used for manufacturing a laminated rubber structure in which a plurality of unvulcanized rubber members and intermediate plates are alternately laminated, and end face plates are arranged at both ends in the lamination direction and vulcanized and molded,
A positioning shaft provided in each of the intermediate plates and inserted in the stacking direction into positioning holes arranged in the stacking direction;
Setting a lockable locking portion from one stacking direction only at least a portion of the intermediate plate to the positioning shaft,
A locking member formed on the positioning shaft so as to be able to project and retract in the radial direction and capable of locking to one surface in the stacking direction of the intermediate plate by projecting radially outward, and the locking member in the radial direction of the positioning shaft A biasing member that biases outward,
The locking member is formed so as to move radially inward of the positioning shaft against the biasing force of the biasing member when the positioning shaft is inserted into the positioning hole of the intermediate plate from the other side in the stacking direction. Mold for vulcanization of laminated rubber structures. Laminated rubber which laminates a plurality of unvulcanized rubber members and intermediate plates alternately, and forms laminated rubber structures by placing end face plates at both ends in the laminating direction and vulcanizing them in a vulcanizing mold. In the manufacturing method of the structure,
The positioning holes provided in each of the intermediate plates are formed so that the positioning holes can be inserted from one and the other in the stacking direction, and at least part of the outer shape gradually extends from the outer side in the stacking direction toward the inner side in the stacking direction. In the vulcanizing mold having a pair of positioning shafts formed so as to be small, the positioning holes of the intermediate plates are sequentially arranged from the inner side toward the inner side in the stacking direction from the outer side in the stacking direction. A method for producing a laminated rubber structure, characterized by being arranged and vulcanized. Laminating to form a laminated rubber structure by laminating a plurality of unvulcanized rubber members and intermediate plates alternately, and placing end face plates at both ends in the laminating direction and vulcanizing them in a vulcanizing mold. In the method for producing a rubber structure,
Each of the intermediate plates is formed so as to be able to be inserted through the positioning holes arranged in the stacking direction in the stacking direction, and at least some of the intermediate plates have a locking portion that can be locked from only one of the stacking directions. In the vulcanization mold provided with a positioning shaft, each intermediate plate is disposed and vulcanized so that the locking portion of the positioning shaft is locked to the at least some of the intermediate plates ,
The locking portion of the positioning shaft is formed so as to be capable of protruding and retracting in the radial direction, and protrudes radially outward to position the locking member on the one surface in the stacking direction of the intermediate plate. A biasing member that biases the shaft radially outward.
The locking member is formed so as to move radially inward of the positioning shaft against the biasing force of the biasing member when the positioning shaft is inserted into the positioning hole of the intermediate plate from the other side in the stacking direction. A method for producing a laminated rubber structure characterized by the above.

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