JP2015039851A - Method for molding cyclic rubber member for seismic isolator, and method for producing unit laminate for seismic isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for molding a cyclic rubber member for a seismic isolator in which raw material rubber is not made useless, and further having reduced steps; and a method for producing a unit laminate for a seismic isolator.SOLUTION: While rotating a plate 5, a ribbon 51 for a cyclic rubber member is fed from a feeder of a ribbon for a cyclic rubber member to the surface of the plate 5, further, in the front part in the rotary direction than the feed position, it is pressed to the side of the plate 5 by a roller 39, thus, the ribbon 51 for a cyclic rubber member is pasted while being rolled onto the plate 5, during the rotation of the plate 5, the feed position of the ribbon 51 for a cyclic rubber member is shifted to the radial direction of the rotation of the plate 5, thus is made adjacent to the radial direction side of the ribbon 51 for a cyclic rubber member pasted in former rotation of the plate 5, the ribbon 51 for a cyclic rubber member to be fed upon the following rotation is pasted on the ribbon 51 for a cyclic rubber member, and the ribbon 51 for a cyclic rubber member is molded into a cyclic member with a fixed width to a radial direction.

Description

  The present invention relates to a method for forming an annular rubber member for a seismic isolation device and a method for manufacturing a unit laminate for a seismic isolation device.

  A general structure of a laminated rubber bearing type seismic isolation device is shown in FIG. In this seismic isolation device 100, an annular rubber member 101 shown in FIG. 6 (b) and metal plates 102 having substantially the same shape are alternately laminated, and an annular ring having a diameter larger than that of the annular rubber member 101 above and below the annular rubber member 101. The flanges 103 and 103 are provided. On the outer diameter side of the laminated portion of the annular rubber member 101 and the rate 102, a cover rubber 104 formed in a rectangular band shape is wound in a cylindrical shape. The central hole of the annular rubber member 101, the plate 102, and the flanges 103 and 103 are integrated in the vertical direction in a state in which they are laminated to form a central cavity 105 of the seismic isolation device. Conventionally, the annular rubber member 101 used in such a seismic isolation device is formed by first manufacturing a rubber sheet and punching the rubber sheet into an annular shape (see, for example, Patent Document 1).

  However, with this method, the rubber after punching was wasted. In addition, as described above, there are many processes until the annular rubber member is completed. As a result, the manufacture of seismic isolation devices has been costly.

Japanese Patent Laid-Open No. 3-92631

  The problem to be solved by the present invention is to provide a method for forming an annular rubber member for a seismic isolation device and a method for manufacturing a unit laminated body for a seismic isolation device with less raw rubber and fewer steps.

  A method for molding an annular rubber member for a seismic isolation device according to an embodiment is a molding method for the annular rubber member used in a seismic isolation device having a portion in which an annular rubber member and a plate are laminated, and while rotating the plate, An annular rubber member ribbon is supplied onto the plate from the annular rubber member ribbon supply device, and is pressed to the plate side by a roller in front of the supply position in the rotational direction, whereby the annular rubber member ribbon is At least one of the ribbon rubber ribbon supply device and the plate is moved intermittently or continuously during the rotation of the plate while being wound on the plate, and for the annular rubber member on the plate. The ribbon supply position is shifted in the radial direction of the rotation of the plate, so that the ribbon is pasted when the plate rotates further. Adhering the annular rubber member ribbon to the radial side of the annular rubber member ribbon, the annular rubber member ribbon supplied at the next rotation is pasted, and the plate is rotated a plurality of times, whereby the annular rubber member ribbon is It is formed into an annular member having a constant width in the radial direction.

  According to the method for forming an annular rubber member for a seismic isolation device and the method for manufacturing a unit laminated body for a seismic isolation device according to the embodiment, the raw rubber is not wasted, and the steps until molding can be reduced.

The front view of the shaping | molding apparatus of the cyclic | annular rubber member for seismic isolation apparatuses of embodiment. The top view of the shaping | molding apparatus of the cyclic | annular rubber member for seismic isolation apparatuses of embodiment. The enlarged view near the nozzle | cap | die of the extruder for cyclic | annular rubber members of embodiment. Process explanatory drawing of the affixing to the plate of the ribbon for annular rubber members. Sectional drawing of the plate radial direction in the middle of sticking of the ribbon for cyclic | annular rubber members. (A) Sectional drawing of a seismic isolation apparatus. (B) The perspective view of the cyclic | annular rubber member which comprises a laminated rubber support.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, “outer diameter side” and “inner diameter side” refer to the inner diameter side and outer diameter side of the disk-shaped table 10. Further, the “front-rear direction” is an extension direction of the rail 12 described below, and the lower side in FIG. 2 is the front and the upper side is the rear. “Left” and “right” are expressions when the molding apparatus is viewed from the front.

(1) Structure of molding apparatus for annular rubber member for seismic isolation device FIG. 1 and FIG. 2 show a molding apparatus 1 for an annular rubber member for a seismic isolation device according to an embodiment. The molding apparatus 1 includes an extruder 2 for a cover rubber that extrudes a long rubber member (ribbon-like rubber member), an extruder 3 for an annular rubber member, and a disk-like table 10 that can rotate in the horizontal direction. .

  The cover rubber extruder 2 extrudes a cover rubber ribbon 50 which is a ribbon-like rubber member. The cover rubber ribbon 50 becomes a cover rubber portion of the seismic isolation device after molding. The annular rubber member extruder 3 extrudes an annular rubber member ribbon 51 which is a ribbon-like rubber member. The annular rubber member ribbon 51 becomes an annular rubber member of the seismic isolation device after molding.

  The positional relationship among the cover rubber extruder 2, the annular rubber member extruder 3, and the rail 12 is not particularly limited, but in this embodiment, the cover rubber extruder 2 and the annular rubber member extruder 3 are a single unit. The rails 12 extending in the direction are sandwiched therebetween and are shifted in the extending direction (front-rear direction) of the rails 12. As shown in FIG. 2, a cover rubber extruder 2 is installed on the right side of the rail 12, and an annular rubber member extruder 3 is installed on the left side. The cover rubber extruder 2 is arranged behind the annular rubber member extruder 3. The cover rubber extruder 2 and the annular rubber member extruder 3 are arranged in a posture facing the direction (left-right direction) orthogonal to the extending direction (front-rear direction) of the rail 12, and can extrude the ribbon-like rubber member in the left-right direction. It has become.

  The cover rubber extruder 2 and the annular rubber member extruder 3 are mounted on a dedicated table (not shown), and can be moved forward and backward with respect to the table 10 by the drive mechanism of the table, and further with respect to the horizontal direction. The angle can be changed. The cover rubber extruder 2 and the annular rubber member extruder 3 are extruders for extruding rubber by a general mechanism, and are provided in a casing portion and inside the casing portion, and knead the supplied raw rubber. And a gear pump that is provided on the side of the extrusion port inside the casing and keeps the amount of extrusion constant.

  The bases 20 and 30 are respectively attached to the tip portions of the extruders 2 and 3. Since the base 20 and the base 30 have the same structure, only the base 30 will be described with reference to FIG. The base 30 includes a cylindrical portion 31, a flange portion 32 projecting radially outward from one end portion of the cylindrical portion 31, and a tip end portion 33 extended from the other end portion of the cylindrical portion 31 so that the diameter gradually decreases. With. The flange portion 32 is attached to the main body of the extruder 3 with a bolt 34. The base 30 has a hole through which rubber to be extruded passes. The cross-sectional shape of the hole is not particularly limited, but a shape in which the bottom is substantially flat and the central portion in the width direction is thicker than both end portions in the width direction is desirable. Examples of such a shape include a semicircular shape, a crescent shape, and a substantially triangular shape, and a substantially triangular shape is particularly preferable. As the extruders 2 and 3 move forward, the tips of the caps 20 and 30 come out to the vicinity of the center of the table 10 in the left-right direction.

  Pressers 25 and 35 are provided at positions in the distal direction from the distal ends of the caps 20 and 30, respectively. Since the presser device 25 and the presser device 35 have the same structure, only the presser device 35 will be described with reference to FIG. The presser device 35 is fixed to the annular rubber member extruder 3 main body by a support tool 40. The presser device 35 is a cylinder 36, a piston rod 37 that is integrated with a piston in the cylinder 36 and displaced vertically, a support frame 38 that is fixed to the tip of the piston rod 37, and a support frame 38 that is rotatably supported. The cylindrical presser roller 39 is provided. The width of the presser roller 39 is wider than the width of the hole of the base 30. When the pressing roller 39 moves up and down in conjunction with the vertical movement of the piston rod 37 and is displaced to the lowest position, the pressing roller 39 can press the ribbon-like rubber member on the plate 5 disposed on the table 10 from above.

  The table 10 is a disk-like thing installed horizontally, and rotates in the state maintained horizontal by the servomotor for rotation which is not shown in figure. In this embodiment, it is assumed to rotate counterclockwise. The table device 11 including the table 10 and the rotation servomotor is movable on the rail 12 by a table running servomotor (not shown). By moving on the rail 12, the table device 11 has a ribbon rubber member attaching position between the cover rubber extruder 2 and the annular rubber member extruder 3 and a plate arrangement position away from the ribbon rubber member attaching position. You can move between. Although details will be described later, the molding apparatus 1 has a function of pitch feeding in which the table 10 is shifted by a slight distance from the extruders 2 and 3 during molding of the cover rubber and the annular rubber member. This pitch feed is performed by the table device 11 moving on the rail 12. The feed amount (shift distance) of the pitch feed can be changed and is set by an operation by an operator on a control panel (not shown).

(2) Method for forming annular rubber member for seismic isolation device and method for manufacturing seismic isolation device In the molding method according to the embodiment, the annular rubber member 5 is extruded from the cover rubber extruder 2 to the outer diameter side on the metal plate 5. A cover rubber ribbon 50 is attached, and an annular rubber member ribbon 51 extruded from the annular rubber member extruder 3 is attached to the inside thereof. The plate 5 is a member that becomes a plate that is alternately laminated with the annular rubber member in the seismic isolation device, and is made of metal and has an annular shape. The central hole forms the central cavity of the seismic isolation device.

  When the annular rubber member for a seismic isolation device is molded using the molding apparatus 1 having the above-described configuration, first, the plate 5 is disposed on the table 10 at a plate layout position that is located away from the extruder. At this time, the table 10 is arranged so that the center of rotation of the table 10 coincides with the center of the plate 5. Then, the table apparatus 11 provided with the table 10 moves on the rail 12, and reaches | attains a ribbon-like rubber member sticking position.

  Further, the cover rubber extruder 2 is supplied with natural rubber as raw rubber, and the annular rubber member extruder 3 is supplied with natural rubber and high damping rubber as raw rubber to prepare for extrusion.

(2-1) Affixing Method of Cover Rubber Ribbon 50 In the above state, first, the cover rubber ribbon 50 is wound and attached to the outer diameter side portion of the upper surface of the plate 5 so as to draw a circle. The number of times the cover rubber ribbon 50 is wound is not particularly limited, but here, a case where the ribbon is wound twice will be described.

  First, the cover rubber extruder 2 moves forward, and the tip of the base 20 arrives at a predetermined position above the plate 5. The predetermined position is a position on the inner diameter side by a distance slightly shorter than the thickness of the cover rubber ribbon 50 from the rear end portion on the outer diameter side of the plate 5, and slightly on the right side of the center in the left-right direction of the plate 5. This is the position of the cover rubber extruder 2 side. If it does in this way, in this predetermined position, the rotation direction of the plate 5 will correspond with the direction which extrudes the cover rubber ribbon 50 from the nozzle | cap | die 20. In this state, the rotation axis of the pressing roller of the pressing device 25 in the distal direction of the base 20 is orthogonal to the rotation direction of the plate 5.

  Next, the operation of the cover rubber extruder 2 starts and the rotation of the table 10 starts. When the cover rubber ribbon 50 comes out of the base 20, the presser roll of the presser device 25 is displaced downward. The tip of the cover rubber ribbon 50 coming out of the base 20 falls downward and lands at a position slightly inside the outer diameter side end of the plate 5. The cover rubber ribbon 50 adhered to the landing point advances in the rotation direction as the table 10 rotates, and is immediately sandwiched between the plate 5 and the presser roll and pressed against the plate 5 by the presser roll and pasted. . Subsequent portions of the cover rubber ribbon 50 are also pressed and stuck to the plate 5 by the press roll continuously. As a result, the cover rubber ribbon 50 is stuck on the plate 5 while being wound in a circle. While the table 10 makes one rotation, in principle, the angular velocity of rotation of the table 10 is constant. However, since the extrusion speed is not stable at the initial stage of operation of the cover rubber extruder 2, the angular speed of the servo motor for rotating the table 10 is set to the operation speed of the gear pump of the cover rubber extruder 2 for a certain period of time until stabilization. The angular velocity of the rotation of the table 10 is synchronized with the extrusion speed by interlocking with each other. When the table 10 is rotated once, the cover rubber ribbon 50 is attached to the inner portion of the plate 5 slightly on the outer diameter side by one turn. At this time, the inner diameter side portion of the wound cover rubber ribbon 50 is a beautiful circle.

  Then, the table 10 slightly moves on the rail 12 and is displaced with respect to the base 20. The shift direction is a direction in which the base 20 is shifted outward in the radial direction of the rotation of the table 10, and the shift distance is a distance slightly shorter than the thickness of the cover rubber ribbon 50. By the movement of the table 10, the attaching position of the cover rubber ribbon 50 moves to a position closer to the outer diameter side than the cover rubber ribbon 50 in the first round. During the movement of the table 10 on the rail 12, the table 10 continues to rotate and the cover rubber extruder 2 continues to operate.

  After the table 10 is displaced with respect to the base 20, the second round of the cover rubber ribbon 50 is applied. The cover rubber ribbon 50 in the second round is pushed out from the base 20 so as to be adjacent to the cover rubber ribbon 50 in the first round from the outer diameter side. At this time, the cover rubber ribbon 50 in the second round is pushed out so as to slightly overlap the portion of the cover rubber ribbon 50 in the first round on the outer diameter side of the table 10. Then, it is pressed from above by a presser roll. Since the width of the presser roll is slightly wider than the width of the hole of the base 20, the presser roll can press the entire width direction of the cover rubber ribbon 50 pushed out from the base 20 from the upper side. The overlapping portion of the cover rubber ribbon 50 on the first and second rounds can also be pressed. Therefore, the cover rubber ribbon 50 for the second round is affixed to the plate 5 and is also affixed to the outer diameter side portion of the table rubber ribbon 50 for the first round. It should be noted that the angular velocity of the second turn of the table 10 is slower than the angular velocity of the first turn. On the other hand, the speed of extrusion of the cover rubber ribbon 50 by the cover rubber extruder 2 is constant.

  When the table 10 finishes the second round and the cover rubber ribbon 50 for the second round is pasted, the molding of the cover rubber on the plate 5 is completed (FIG. 4A). The rear end portion of the cover rubber ribbon 50 is in the vicinity of the starting position of the second round of the cover rubber ribbon 50, and the cover rubber ribbon 50 is no longer displaced in the radial direction of the plate 5. Pasted in position. Thereby, the outer diameter side portion of the cover rubber ribbon 50 in the second round becomes a beautiful circle. Further, the outer diameter side portion of the second cover rubber ribbon 50 protrudes from the outer diameter side end portion of the plate 5 to the outer diameter side. When the molding of the cover rubber is completed, the rotation of the table 10 stops and the cover rubber extruder 2 moves backward.

(2-2) Method for forming annular rubber member Next, the annular rubber member ribbon 51 is wound and pasted so as to draw a circle on the inner surface side of the cover rubber ribbon 50 on the upper surface of the plate 5. It is done. The number of turns of the annular rubber member ribbon 51 on the plate 5 may be plural, and is not limited to the number of turns shown in FIG.

  First, the annular rubber member extruder 3 moves forward, and the tip of the die 30 arrives at a predetermined position above the plate 5. The predetermined position is a position adjacent to the inner diameter side portion of the cover rubber ribbon 50 affixed in the first round, and is slightly on the left side of the front center of the plate 5 in the left-right direction (extrusion for the annular rubber member). (The machine 3 side). If it does in this way, in this predetermined position, the rotation direction of the plate 5 will correspond with the direction which extrudes the ribbon 51 for cyclic | annular rubber members from the nozzle | cap | die 30. FIG. In this state, the rotation axis of the pressing roller of the pressing device 35 located in the distal direction from the base 30 is orthogonal to the rotation direction of the plate 5.

  Next, the annular rubber member extruder 3 starts operating, and the rotation of the table 10 starts. When the annular rubber member ribbon 51 comes out of the base 30, the presser roll 39 of the presser device 35 is displaced downward. The tip of the annular rubber member ribbon 51 coming out of the base 30 falls downward and lands at a position adjacent to the cover rubber ribbon 50 on the plate 5. Then, as the table 10 rotates, it proceeds in the direction of rotation, and is immediately sandwiched between the plate 5 and the presser roll 39, pressed against the plate 5 by the presser roll 39, and pasted. The subsequent portion of the annular rubber member ribbon 51 is also pressed and pasted along the cover rubber ribbon 50 on the plate 5 by the press roll 39. FIG. 3 shows a state of pasting at this time. Thereby, the ribbon 51 for annular rubber members is stuck on the plate 5 while being wound so as to draw a circle. While the table 10 makes one rotation, in principle, the angular velocity of rotation of the table 10 is constant. However, since the extrusion speed is not stable at the initial stage of operation of the annular rubber member extruder 3, the angular speed of the servo motor for rotating the table 10 is set to the operation of the gear pump of the annular rubber member extruder 3 for a certain time until stabilization. The angular velocity of the rotation of the table 10 is synchronized with the extrusion speed by interlocking with the speed. When the table 10 makes one rotation, the annular rubber member ribbon 51 is attached to the cover rubber ribbon 50 adjacent to the inner diameter side for one round (FIG. 4B). At this time, the outer diameter side portion of the wound annular rubber member ribbon 51 is a beautiful circle.

  Then, the table 10 slightly moves on the rail 12 and shifts with respect to the base 30. The shift direction is a direction in which the base 30 moves to the inner diameter side of the rotation of the table 10, and the shift distance is a distance slightly shorter than the thickness of the annular rubber member ribbon 51. In this way, the table 10 being displaced relative to the base 30 intermittently with the passage of time is called pitch feed. By this pitch feed, the attaching position of the annular rubber member ribbon 51 is moved to the position on the inner diameter side of the first round rubber member ribbon 51 (FIG. 4C). During the pitch feed, the rotation of the table 10 and the annular rubber member extruder 3 continue to operate.

  After the pitch feeding, the annular rubber member ribbon 51 for the second round is attached. The second round annular rubber member ribbon 51 is pushed out of the base 30 so as to be adjacent to the inner diameter side of the first round annular rubber member ribbon 51. At this time, the second round annular rubber member ribbon 51 is pushed out so as to slightly overlap the inner diameter side portion of the first round annular rubber member ribbon 51. Then, it is pressed by the presser roll 39 from above. As described above, the width of the pressing roller 39 is slightly wider than the width of the hole of the base 30. Therefore, the presser roll 39 can press the entire width direction of the second round annular rubber member ribbon 51 pushed out from the base 30 from above, and naturally the first and second round annular rubber member ribbons. The overlapping portion of 51 can also be pressed. Therefore, the second round annular rubber member ribbon 51 is attached to the plate 5 and is also attached to the inner diameter side portion of the first round annular rubber member ribbon 51. When the rotation of the second turn of the table 10 is started, the rotation speed of the servo motor for rotation is changed, and the angular velocity of the second turn of the table 10 is faster than the angular velocity of the first turn. Meanwhile, the extrusion speed of the annular rubber member extruder 3 is constant.

  When the second round annular rubber member ribbon 51 is attached to the plate 5 in this way (FIG. 4D), it is the same as when the second round annular rubber member ribbon 51 starts to be attached. Then, the application of the ribbon 51 for the annular rubber member in the third round is started. Then, this operation is repeated until the last one round on the inner diameter side of the plate 5 is pasted. That is, each time the annular rubber member ribbon 51 is attached to the plate 5 by one turn, the table 10 is pitch-fed to the inner diameter side of the previously attached annular rubber member ribbon 51 and the next circumference. An annular rubber member ribbon 51 is affixed. The angular speed of rotation of the table 10 increases as the annular rubber member ribbon 51 is attached to the inner diameter side of the plate 5. Meanwhile, the extrusion speed of the annular rubber member extruder 3 is kept constant during that time. When this operation is repeated a plurality of times and the last one round is pasted, the molding of the annular rubber member having a constant width in the radial direction is completed (FIG. 4E). The rear end portion of the annular rubber member ribbon 51 is in the vicinity of the position where the last circumference of the annular rubber member ribbon 51 is pasted, and the annular rubber member ribbon 51 is displaced in the radial direction of the plate 5. It is pasted at the position where there is no more. Thereby, the inner diameter side portion of the last annular rubber member ribbon 51 becomes a beautiful circle. When the molding of the annular rubber member is finished, the annular rubber member extruder 3 moves backward.

(2-3) Manufacturing Method of Seismic Isolation Device, etc. As described above, a unit laminate including the plate 5, the cover rubber and the annular rubber member formed thereon is completed. When the unit laminated body is completed, the table device 11 including the table 10 moves on the rail 12 and returns to the plate arrangement position. Accordingly, the unit laminate is removed from the table 10.

  Thereafter, the plate 5 is placed on the table 10 again, and the same process as described above is started.

  The completed unit laminates are stacked one after another, and when a predetermined number of stacks are stacked, flanges are stacked above and below. Vulcanization is performed in this state, and the seismic isolation device is completed. The portion of the cover rubber formed on the plate 5 that protrudes outward from the outer diameter of the plate 5 covers the entire outer diameter side of the stacked plates 5 after vulcanization.

(3) Effect According to the above-described embodiment, the rubber sheet ribbon 51 is first attached to the plate 5 while being annularly wound without going through two steps of punching it out. The annular rubber member can be formed in one step. Further, since the raw rubber is directly formed into the shape of an annular rubber member, there is no waste in the raw rubber. Therefore, the manufacturing cost of the seismic isolation device can be reduced.

  Further, since the annular rubber member ribbon 51 is pressed to the plate 5 side by the presser roller 39 while being affixed to the plate 5, even if there is no step of applying pressure from above on the entire ring after being wound in an annular shape, the annular rubber member The molding of the member is completed. Also, the air between the annular rubber member ribbon 51 and the plate 5 can be pushed out.

  Also, the annular rubber member ribbon 51 is attached to the plate 5 so as to draw a circle, and the table 10 is pitch-fed and attached to draw the next circle every time one round of attachment is completed. It is done. Therefore, the annular rubber member ribbon 51 is wound in a beautiful circle on the outermost periphery and the innermost periphery. For this reason, the annular rubber member has an annular shape in which the inner diameter and the outer diameter are substantially perfect circles.

  Further, the rotational speed of the plate 5 when the annular rubber member ribbon 51 is attached to the inner diameter side portion of the plate 5 is faster than the rotation speed of the plate 5 when the annular rubber member ribbon 51 is attached to the outer diameter side portion. Even if the speed at which the annular rubber member ribbon 51 is pushed out from the annular rubber member extruder 3 is constant, the annular rubber member ribbon 51 is neatly wound on the plate 5.

  Further, since the annular rubber member ribbon 51 is affixed from the outer diameter side of the plate 5, the tip of the annular rubber member ribbon 51 can be easily affixed to the plate 5. The angular speed of rotation of the plate 5 is slower when the annular rubber member ribbon 51 is attached to the outer diameter side of the plate 5 than when it is attached to the inner diameter side. Therefore, the tip of the annular rubber member ribbon 51 is easily adhered without being splashed when it falls on the plate 5.

  In the above embodiment, if the feed amount of the pitch feed, that is, the radial movement distance of the table 10 with respect to the base 30 changes, the portion of the annular rubber member ribbon 51 that is pasted at the time of the previous rotation of the table 10 and The width of the portion that overlaps the portion pasted at the next rotation changes. Specifically, when the feed amount of the pitch feed is close to the thickness of the annular rubber member ribbon 51, the portion of the annular rubber member ribbon 51 that is pasted at the time of the previous rotation of the table 10 and the next rotation The width of the overlapping portion becomes wider as the width of the overlapping portion with the pasted portion becomes narrower and the feed amount becomes smaller. And the thickness of the cyclic | annular rubber member after shaping | molding becomes thick, so that the width | variety of this overlapping part is wide. Accordingly, by adjusting the feed amount of the pitch feed, it is possible to manufacture annular rubber members having various thicknesses without changing the equipment.

  In this way, since the thickness of the annular rubber member can be changed by adjusting the feed amount of the pitch feed, the annular rubber member having various thicknesses can be manufactured with one base. For this reason, when the type of the annular rubber member to be manufactured is changed to one having a different thickness, it is not necessary to replace the base with one having a different hole diameter. This increases the productivity of the factory.

  Further, since the cover rubber ribbon 50 is attached to the plate 5 by pitch feed, the same pitch feed effect as described above is obtained.

  In addition, the base is long as a whole because it includes a cylindrical portion and a tip end portion extended from the cylindrical portion so that the diameter gradually decreases. Therefore, even if the die approaches the plate 5, portions other than the die of the extruder can keep a certain distance from the table 10. As a result, portions other than the die of the extruder do not hit the plate 5 or the table 10, and the rotation of the table 10 is not hindered.

  Moreover, if the cross-sectional shape of the hole of the die is a triangular shape having a substantially flat bottom and a high central portion in the width direction, an ideal annular rubber member or cover rubber can be molded. More specifically, since the lower surface of the extruded ribbon-like rubber member becomes flat, when the ribbon-like rubber member is affixed on the plate 5, the ribbon-like rubber member is placed between the ribbon-like rubber member and the plate 5. It is possible to suppress the generation of voids in the ring, and it is possible to suppress the entry of air into the annular rubber member. Further, the ribbon-shaped rubber member to be extruded has a central portion in the width direction that is thicker than both end portions in the width direction, and side surfaces (two surfaces from the center portion in the width direction to both end portions in the width direction) are flat. Therefore, when affixing the ribbon-shaped rubber member to the plate 5, when a part of the lower surface of the ribbon-shaped rubber member to be subsequently bonded is overlapped on the side surface of the ribbon-shaped rubber member previously bonded, Next, the ribbon-like rubber member attached next is inclined and the side faces upward (see FIG. 5). Therefore, it is easy to make the upper surface of the annular rubber member a flat surface with less unevenness. Therefore, it is possible to suppress air entry between the stacked bodies when the unit stacked bodies are stacked.

  Further, since the die of the extruder is arranged so that the direction in which the ribbon-like rubber member is pushed out coincides with the rotation direction of the table 10, the tip of the ribbon-like rubber member is smoothly placed on the surface of the plate 5 on the table 10. Can be pasted.

  In addition, a ribbon-like rubber member is directly attached to the plate 5, and further, a cover rubber is attached to the outer diameter side of the plate 5. Compared to the conventional manufacturing method in which plates and annular rubber members are alternately stacked and the cover rubber is wound from the outer diameter side, the seismic isolation device can be easily manufactured.

(4) Modified example In the above embodiment, the extruder is used as a supply device for the ribbon-shaped rubber member, but other devices may be used as the supply device. For example, an injection molding machine may be used. Further, the ribbon-like rubber member may be manufactured in another process, and the ribbon-like rubber member may be supplied onto the plate 5 using a supply device.

  Further, the pitch feed of the table 10 may be performed a plurality of times during one rotation instead of once every rotation of the table 10. Further, the table 10 may be moved continuously over time with respect to the die 30 instead of being pitch-fed. In this case, the annular rubber member ribbon 51 is attached so as to draw a vortex from the outer diameter side to the inner diameter side of the plate 5.

  In the above-described embodiment, the annular rubber member ribbon 51 is bonded from the outer diameter side of the plate 5 toward the inner diameter side. However, the annular rubber member ribbon 51 may be bonded from the inner diameter side toward the outer diameter side. .

  The relative movement between the extruders 2 and 3 and the table 10 for pitch feeding or the like may be performed not by the movement of the table 10 as described above but by the movement of the extruders 2 and 3. good. Moreover, both the extruders 2 and 3 and the table 10 may move.

  In the above embodiment, the cover rubber ribbon 50 is attached to the plate 5 earlier than the annular rubber member ribbon 51, but the attaching order may be reversed.

  Affixing the annular rubber member ribbon 51 is the reverse of the above embodiment, with the angular speed of rotation of the plate 5 being constant, and the speed at which the annular rubber member ribbon 51 is pushed out from the annular rubber member extruder 3. The time may be increased as the annular rubber member ribbon 51 is attached to the inner diameter side of the plate 5. Also in this case, it is desirable to stick the annular rubber member ribbon 51 from the outer diameter side to the inner diameter side of the plate 5.

  The cover rubber ribbon 50 is attached to the plate 5 by supplying at least one of the cover rubber extruder 2 or the plate 5 each time the plate 5 rotates to supply the cover rubber ribbon 50 on the plate 5. The position is shifted in the radial direction of the rotation of the plate 5 and the plate 5 is rotated a plurality of times, and this shifting direction is reversed every predetermined number of times (one or more predetermined times). Anyway.

  For example, when the predetermined number of times is one and the plate 5 is rotated four times, the following is performed. First, the cover rubber ribbon 50 is attached to the plate 5 for one turn. Next, the cover rubber extruder 2 is shifted to the outer diameter side of the plate 5 and the second cover rubber ribbon 50 is attached to the outer diameter side of the first cover rubber ribbon 50. Same as the above embodiment). Next, the cover rubber extruder 2 is shifted to the inner diameter side of the plate 5, and the third cover rubber ribbon 50 is attached on the first cover rubber ribbon 50. Next, the cover rubber extruder 2 is shifted to the outer diameter side of the plate 5, and the cover rubber ribbon 50 for the fourth round is affixed on the cover rubber ribbon 50 for the second round.

  In this way, every time the direction of shifting is reversed, the cover rubber ribbon 50 to be subsequently attached is laminated on the cover rubber ribbon 50 that has already been attached. The thickness on 5 can be increased. The thickness of the cover rubber on the plate 5 can be adjusted by adjusting the number of the cover rubber ribbons 50 laminated. Thereby, cover rubber of various thickness can be manufactured with one nozzle. Therefore, when changing the thickness of the cover rubber to be manufactured, it is not necessary to replace the base with one having a different hole diameter. This increases the productivity of the factory.

DESCRIPTION OF SYMBOLS 1 ... Molding apparatus, 10 ... Table, 11 ... Table apparatus, 12 ... Rail, 2 ... Cover rubber extruder, 20 ... Base, 25 ... Holding device, 3 ... Extruder for annular rubber member, 30 ... Base, 31 ... Cylindrical part, 32 ... Flange part, 33 ... Tip end part, 34 ... Bolt, 35 ... Pressing device, 36 ... Cylinder, 37 ... Piston rod, 38 ... Support frame, 39 ... Pressing roller, 40 ... Supporting tool, 5 plates, DESCRIPTION OF SYMBOLS 50 ... Ribbon for cover rubber, 51 ... Ribbon for annular rubber member, 100 ... Seismic isolation device, 101 ... Ring rubber member, 102 ... Plate, 103 ... Flange, 104 ... Cover rubber, 105 ... Cavity

Method of molding the isolator annular rubber member embodiment is a method of forming the annular rubber member used in the seismic isolation device having a portion formed by laminating the annular rubber member and the plate, rotating the plate, the ribbon annular rubber member, while supplying from the supply system of the ribbon annular rubber member to said plate, said supply position pressing than to the plate side by the rollers in the rotation direction front, the ribbon for the annular rubber member by this At least one of the ribbon rubber ribbon supply device and the plate is moved intermittently or continuously during the rotation of the plate while being wound on the plate, and for the annular rubber member on the plate. The supply position of the ribbon is shifted in the radial direction of the rotation of the plate. By adjacent in the radial direction of the ribbon rubber member, and made to have an overlap in the radial direction of the portion of the previously pasted annular rubber member ribbon during rotation of the annular rubber is supplied during the next rotation The ribbon for member is formed into an annular member having a certain width in the radial direction by attaching a ribbon for member and rotating the plate a plurality of times.

Claims (6)

A method for molding the annular rubber member used in a seismic isolation device having a portion in which an annular rubber member and a plate are laminated,
While rotating the plate, the annular rubber member ribbon is supplied onto the plate from the supply device of the annular rubber member ribbon, and is pressed to the plate side by a roller in front of the supply position in the rotation direction. Affixing the ribbon for the annular rubber member on the plate,
During rotation of the plate, at least one of the annular rubber member ribbon supply device and the plate is moved intermittently or continuously, and the supply position of the annular rubber member ribbon on the plate is adjusted. Shifting in the radial direction of rotation, thereby adhering the annular rubber member ribbon supplied at the next rotation adjacent to the radial side of the annular rubber member ribbon adhered at the previous rotation of the plate ,
A method for molding an annular rubber member for a seismic isolation device, wherein the annular rubber member ribbon is molded into an annular member having a certain width in the radial direction by rotating the plate a plurality of times.   By moving at least one of the annular rubber member ribbon supply device and the plate each time the plate makes one rotation, the supply position of the annular rubber member ribbon on the plate is changed to the rotation of the plate. The method for molding an annular rubber member for a seismic isolation device according to claim 1, wherein the molding is performed in a radial direction. The speed at which the annular rubber member ribbon is supplied from the annular rubber member ribbon supply device is constant,
The angular velocity of rotation of the plate is increased as the annular rubber member ribbon is attached to the inner diameter side of the plate,
The method for forming an annular rubber member for a seismic isolation device according to claim 1 or 2, wherein the ribbon for an annular rubber member is attached from the outer diameter side to the inner diameter side of the plate. The angular speed of rotation of the plate is constant,
The speed at which the annular rubber member ribbon is supplied from the annular rubber member ribbon supply device is increased as the annular rubber member ribbon is attached to the inner diameter side of the plate,
The method for forming an annular rubber member for a seismic isolation device according to claim 1 or 2, wherein the ribbon for an annular rubber member is attached from the outer diameter side to the inner diameter side of the plate. An annular rubber member is molded on the inner diameter side portion of the plate, and a cover rubber is molded on the outer diameter side portion.
While rotating the plate, the cover rubber ribbon is supplied from the cover rubber ribbon supply device to the outer diameter side portion on the plate, and is pressed to the plate side by a roller in front of the supply position in the rotation direction. Then, the cover rubber ribbon is applied while being wound around the outer diameter side of the plate,
During rotation of the plate, at least one of the cover rubber ribbon supply device and the plate is moved intermittently or continuously, and the supply position of the cover rubber ribbon on the plate is changed. Shifting in the radial direction, thereby adhering the cover rubber ribbon to be supplied at the next rotation, adjacent to the radial side of the cover rubber ribbon pasted at the time of the previous rotation of the plate,
By forming the cover rubber on the outer diameter side portion of the plate by performing the rotation of the plate a plurality of times,
An annular rubber member is formed on the inner diameter side portion of the plate by the method according to any one of claims 1 to 4.
Manufacturing method of unit laminated body for seismic isolation device. Each time the plate rotates once, at least one of the cover rubber ribbon supply device and the plate is moved to shift the cover rubber ribbon supply position on the plate in the radial direction of rotation of the plate. A method for producing a unit laminate for a seismic isolation device according to claim 5,
6. The method for manufacturing a unit laminate for a seismic isolation device according to claim 5, wherein the direction of shifting the supply position of the cover rubber ribbon is reversed every time the cover rubber ribbon is shifted a predetermined number of times.

Images