JP2014073583A - Tire vulcanization machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire vulcanization machine in which opening between an upper mold part and a lower mold part is suppressed, thereby stable vulcanization can be performed.SOLUTION: A tire vulcanization machine includes a connection device 21 that connects an upper table 3b and a lower table 3a in a mold closed state in which an upper mold part 2b and a lower mold part 2a are closed, and a connection device 21 includes: two or more tie rods 22 in which one end is fastened to one of the upper table 3b and the lower table 3a, and in the other end, a small diameter part 22b in which an external diameter is reduced to form a flange part 22a is possessed; a clamp member 23 that fits to a small diameter part 22b of each tie rod 22 that penetrates the other of the upper table 3b and the lower table 3a from a horizontal direction, and retains a flange part 22a; and a spacer 24 that is inserted in an aperture between the clamp member 23 and a flange part 23a.

Description

  The present invention relates to a tire vulcanizer that can suppress the opening of an upper mold part and a lower mold part and perform stable vulcanization.

  The vulcanization of the tire is performed using, for example, a tire vulcanizer. Conventionally, as shown in FIG. 8, the tire vulcanizer d moves up and down the lower table b1 to which the lower mold part a1 is attached, the upper table b2 to which the upper mold part a2 is attached, and the upper table b2, for example. Elevating means c that is freely supported (for example, Patent Document 1 below).

  In such a tire vulcanizer d, the upper table b2 is raised and lowered by the lifting means c, and the upper and lower mold parts a1 and a2 are opened and closed. Further, after the upper and lower mold parts a1 and a2 are closed, the upper mold part a1 and the lower mold part a2 are fastened to each other by pressing the upper table b2 downward by the elevating means c.

Japanese Patent Laid-Open No. 10-67017

  However, during the tire vulcanization, a large force in the opening direction acts on the upper mold part a1 and the lower mold part a2. This large force is applied to the elevating means c via the upper table b2, and play is likely to occur in the bearing portion of the elevating means c. In such an elevating means c, during the vulcanization, the upper mold part a1 and the lower mold part a2 cannot be firmly tightened, and a gap is formed between the upper and lower mold parts, so that stable vulcanization is achieved. There was a problem that could not be done.

  The present invention has been devised in view of the actual situation as described above, and provides a tire vulcanizer capable of performing stable vulcanization by suppressing the opening between the upper mold part and the lower mold part. With the goal.

  Of the present invention, the invention according to claim 1 comprises a lower table to which the lower mold part is attached and an upper table to which the upper mold part is attached, and the lower table and the upper table are relatively close to each other. A tire vulcanizer capable of moving and separating, wherein the upper table is closed when the upper mold part and the lower mold part are closed by the close movement of the upper table and the lower table. And a connecting tool for connecting the lower table, the connecting tool having an outer end so that one end is fixed to one of the lower table and the upper table and extends vertically, and a flange portion is formed at the other end. A plurality of tie rods having small diameter portions with reduced diameters, and clamps that fit from the horizontal direction to the small diameter portions of the tie rods that pass through the other of the lower table and the upper table to prevent the flange portion from coming off. When, characterized in that it comprises said clamp fixture, and a spacer that is inserted into the gap between the flange portion of the tie rod.

  According to a second aspect of the present invention, there is provided a tire vulcanizer according to the first aspect, wherein the spacer is prepared in advance with a plurality of types of thicknesses and is selected from the set. It is.

  The invention according to claim 3 is the tire vulcanizer according to claim 1 or 2, wherein the spacer has an inner peripheral surface that matches a cross-sectional shape of the small diameter portion of the tie rod.

  According to a fourth aspect of the present invention, the clamp tool reciprocally moves the clamp piece in the horizontal direction, and a pair of clamp pieces having an inner peripheral surface that matches the cross-sectional shape of the small diameter portion of the tie rod. A tire vulcanizer according to any one of claims 1 to 3, comprising a cylinder device.

  The invention according to claim 5 is the tire vulcanizer according to any one of claims 1 to 4, further comprising pressing means for lifting the lower mold with respect to the lower table in the closed mold state. is there.

  The invention according to claim 6 further includes elevating means for supporting the upper table so as to be movable up and down, and the elevating means moves the upper table up and down relative to the lower table and lowers the upper table. The tire vulcanizer according to any one of claims 1 to 5, wherein the closed mold state is achieved.

  According to the present invention, there is provided a tire vulcanizer in which a lower table to which a lower mold part is attached and an upper table to which an upper mold part is attached are capable of relatively moving toward and away from each other. It includes a connector for connecting the upper table and the lower table in a closed state in which the upper and lower mold parts are closed by the approaching movement with the table.

  The coupling tool has a plurality of tie rods having a small diameter portion whose one end is fixed to one of the lower table and the upper table and extends up and down, and the outer diameter is reduced so as to form a flange portion at the other end, In the gap between the clamp tool and the flange portion of the tie rod, a clamp tool that fits from the horizontal direction to the small diameter portion of each tie rod that passes through the other of the lower table and the upper table to prevent the flange portion from coming off. And a spacer to be inserted.

  Such a connector can be fixed using a tie rod so that the upper table and the lower table are not opened. Therefore, for example, even when a backlash or the like connected to the upper table has a backlash, the upper and lower mold parts are connected by the connecting tool, so that the opening is suppressed.

  In addition, the coupling tool includes a spacer that is inserted not only in the flange portion of the clamp tool and the tie rod but also in order to prevent the flange portion from coming off with the clamp tool. Therefore, by adjusting the thickness of the spacer according to the gap, the opening of the upper and lower mold parts can be reliably suppressed with a simple configuration. Further, even when the thickness of the upper or lower mold part is changed, it can be dealt with by changing the thickness of the spacer.

It is a perspective view of the tire vulcanizer of one embodiment of the present invention. It is sectional drawing of an up-and-down metal mold | die part, (A) shows an open mold state, (B) shows a closed mold state. It is a front view of a tire vulcanizer. It is a schematic side view explaining the effect | action by the raising / lowering means of a tire vulcanizer. FIG. 2 is a two-side view in which a part of the tire vulcanizer is enlarged. It is a two-sided view of the tie rod before clamping. It is a two-view figure of the tie rod after a clamp. It is a perspective view of the conventional tire vulcanizer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a perspective view of a tire vulcanizer 1 of the present embodiment. The tire vulcanizer 1 according to this embodiment includes a lower table 3a to which the lower mold part 2a is attached, an upper table 3b to which the upper mold part 2b is attached, and the relative proximity of the lower table 3a and the upper table 3b. Elevating means 35 that enables movement and separation movement is provided.

  The lower mold part 2a and the upper mold part 2b are not particularly defined, and those having a well-known structure are appropriately used. For example, as shown in FIGS. 2A and 2B, the lower mold part 2 a supports a side mold 6 that molds the outer surface of one side part of the green tire T and the side mold 6. And a platen plate 7 for heating. The lower mold part 2 a is attached to the lower table 3 a via the platen plate 7.

  The upper mold portion 2b includes a side mold 8 for molding the outer surface of the other side portion of the green tire T, an annular tread mold 9 for molding the outer surface of the tread portion of the green tire T, the side mold 8 and the tread mold. And a cylindrical container 11 having an inclination 11a for reducing the diameter of the tread mold 9.

  The container 11 is attached to the lower surface of the upper table 3b.

  The side mold 8 and the tread mold 9 are attached to the upper table 3b via the platen plate 10.

  Further, the platen plate 10 is attached so as to be movable relative to the upper table 3b via the cylinder 12, for example. For this reason, by moving the platen plate 10 upward by the cylinder 12, the tread mold 9 can be raised along the inclination 11a of the container 11 while rising.

  The lower mold part 2a or the upper mold part 2b is replaced with a different one depending on the size of the raw tire T to be vulcanized. In this case, for example, as shown in FIG. 2B, the inter-table dimension H from the upper surface of the lower table 3a to the lower surface of the upper table 3b may change.

  In the present embodiment, the raw tire T is formed by, for example, sequentially attaching unvulcanized tire constituent members to the outer surface of the rigid core G. The rigid core G is an assembly type and has a tread molding portion that forms the inner surface of the tread portion of the green tire T and a side molding portion that forms the inner surface of the side portion. The rigid core G is vulcanized together with the green tire T. After vulcanization, the rigid core is disassembled and removed from the vulcanized tire.

  As shown in FIG. 1, the tire vulcanizer 1 includes a frame 13 including side plates 13 a (only one is shown in FIG. 1) on both the left and right sides, and a support base 14 provided in the frame 13. And have.

  For example, the lower table 3 a is fixed to the support base 14. For example, the support base 14 is preferably provided so as to be guided by rails (not shown) provided on the frame 13 and to be pulled out from the tire vulcanizer 1 in the horizontal direction. According to such a support base 14, the process of putting the raw tire T into the lower mold part 2a or the process of taking out the vulcanized tire from the lower mold part 2a is efficiently performed.

  The raising / lowering means 35 includes, for example, a crank mechanism 36 and supports the upper table 3b to be raised and lowered.

  The crank mechanism 36 includes a crank 37 rotatable around an axis i, a guide guide 38 having a vertical guide portion 38a extending in the vertical direction, a slider 39 fixed to the upper table 3b and guided by the guide guide 38, and A link 40 that connects the crank 37 and the slider 39 is included.

  The crank 37 according to the present embodiment includes, for example, a crank gear 41 having teeth on the outer periphery. The crank gear 41 is pivotally attached to the side plate 13a.

  The crank mechanism 36 includes drive means 42 that drives the crank gear 41. The drive means 42 includes a drive gear 42 a that meshes with the crank gear 41. The drive gear 42a is fixed to, for example, an output shaft 43 of a motor or a speed reducer linked to the motor.

  The guide guide 38 is formed on each side plate 13a, for example. The guide guide 38 of this embodiment includes an upper and lower guide portion 38a and a lateral guide portion 38b extending in the horizontal direction from the upper end thereof.

  The vertical guide portion 38a is a groove with an upper end opening extending along a vertical plane passing through the axis i, and the slider 39 is guided along the groove.

  The horizontal guide part 38b is smoothly connected to the vertical guide part 38a via an arc part. The lateral guide portion 38b is formed by the upper end edge of the side plate 13a.

  The slider 39 includes, for example, a support shaft portion 39a and a roller portion 39b that is rotatably supported on one end side of the support shaft portion 39a and slides or rolls along a groove of the upper and lower guide portions 38a. The other end side of the support portion 39a is fixed to the upper table 3b.

  The link 40 has a lower end pivotally supported at a first pivot point Q1 that is eccentric from the axis i of the crank 37, for example. The upper end portion of the link 40 is pivotally supported at a second pivot point Q2 provided on the slider 39. In addition, this 2nd pivot point Q2 of this embodiment is located in the axial center of the said spindle part 39a.

  Such lifting means 35 can convert the rotational movement around the axis i of the crank 37 into vertical movement. Therefore, as shown in FIG. 3 or FIG. 4, the elevating means 35 can move the upper mold portion 2b along the guide guide 38 between the closed mold state P1 and the separated state P2. . 2B, the closed mold state P1 is a state where the upper mold part 2b and the lower mold part 2a are closed and the raw tire T can be vulcanized. Further, the separation state P2 is typically a state in which the upper mold part 2b is separated from the lower mold part 2a and the raw tire T can be detached as shown in FIG.

  In the present embodiment, the upper mold part 2b performs the vertical movement by the vertical guide part 38a from the closed mold state P1 and the horizontal movement by the horizontal guide part 38b up to the separation position P2. However, as the raising / lowering means 35, the upper mold part 2b may be moved only vertically.

  As shown in FIGS. 1, 3 and 4, the tire vulcanizer 1 according to the present invention includes a connector 21 for connecting the upper table 3b and the lower table 3a in the closed mold state P1.

  The connection tool 21 includes a plurality of tie rods 22, a clamp tool 23, and a spacer 24.

  The tie rod 22 of the present embodiment is an axial body having a circular cross section. One end of the tie rod 22 extends in the vertical direction fixed to one of the upper table 3b and the lower table 3a (in this embodiment, the lower table 3a).

  A plurality of tie rods 22 are provided. In the plan view of the tire vulcanizer shown in the upper side of FIG. 5, the tie rod 22 of the present embodiment is provided at a symmetrical position across the tire rotation axis CL of the raw cover T during vulcanization. That is, the two tie rods 22 are separated by 180 degrees at a circumferential angle around the tire rotation axis CL of the raw cover T. Four tie rods 22 may be provided at intervals of 90 degrees.

  As is clear from the side view shown on the lower side of FIG. 5, each tie rod 22 has a flange portion 22 a on the other end (upper end in the present embodiment) side. The flange portion 22a is formed by providing a small-diameter portion 22b having a relatively reduced outer diameter on an isometric shaft. That is, the upper side of the small diameter portion 22b is configured as a flange portion 22a.

  As shown in FIGS. 5 and 6, an insertion hole 25 is formed in the upper table 3 b. In the closed mold state P1 in which the upper mold part 2b and the lower mold part 2a are closed, each tie rod 22 has a length through which the upper end penetrates the insertion hole 25 of the upper table 3b. The small diameter portion 22b of the tie rod 22 is also provided so as to protrude upward from the upper surface of the upper table 3b. Accordingly, the length of each tie rod 22, the position of the small diameter portion 22b, the length of the small diameter portion in the axial direction, and the like take into account the size of the mold portion and the like, and the inter-table dimension H in the closed mold state P1 (FIG. 2 ( It is determined on the basis of the case where () shown in B) is maximized.

  The clamp tool 23 is provided on the upper surface of the other table (the upper table 3b in this embodiment) of the upper table 3b and the lower table 3a. One clamp tool 23 is provided for each tie rod 22.

  Each clamp tool 23 of the present embodiment includes a pair of clamp pieces 23 c provided on both sides of the insertion hole 25. Each clamp piece 23 c has, for example, a semicircular inner peripheral surface 23 b that matches the cross-sectional shape of the small diameter portion 22 b of the tie rod 22.

  Further, the clamp tool 23 includes, for example, a cylinder device 27 that reciprocally moves the pair of clamp pieces 23c in the horizontal direction in the direction of approaching and separating along the upper surface of the upper table 3b. In the present embodiment, the inner peripheral surface 23b forms a substantially continuous circular hole by bringing the pair of facing clamp pieces 23c into contact with each other. The inner diameter of the circular hole is larger than that of the small diameter portion 22b and smaller than that of the flange portion 22a. Further, by separating the pair of clamp pieces 23, the insertion holes 25 can be exposed without being covered.

  As shown in FIGS. 6 and 7, the clamp tool 23 as described above allows the tie rod 22 to pass through the insertion hole 25 and the small diameter portion 22b upward from the upper table 3b by separating the pair of clamp pieces 23c. Can protrude. Further, by approaching the pair of clamp pieces 23c, the small diameter portion 22b protruding from the upper table 3b can be sandwiched from both sides in the horizontal direction, and the flange portion 22a of the tie rod 22 can be prevented from coming off.

  As shown in FIG. 7, the spacer 24 has, for example, an inner peripheral surface 24 a that matches the cross-sectional shape of the small diameter portion 22 b of the tie rod 22. The spacer 24 forms a ring-like body as a whole by connecting the semicircular arc-shaped ring pieces 24b, and is also referred to as a so-called split collar (in this embodiment, divided into two). The spacer 24 only needs to be fitted to the small diameter portion 22b of the tie rod 22 by an appropriate means. In the present embodiment, like the clamp tool 23, the ring piece 24b is inserted into the gap from the horizontal direction, and the small diameter portion 22b is sandwiched from both sides. Thereby, the spacer 24 can fill the gap between the clamp tool 23 and the flange portion 22 a of the tie rod 22. The inner peripheral surface 24a of the spacer 24 has a diameter that the flange portion 22a cannot pass through. In order to prevent the ring pieces 24b from being separated, for example, bolts or the like (not shown) may be fixed integrally or the link pieces 24b may be fixed to the small diameter portion 22b.

  In the present embodiment, spacers 24 having a plurality of types of thicknesses are prepared in advance as a set, and a spacer having a thickness corresponding to the size of the gap is employed. When the upper mold part 2b or the lower mold part 2a is replaced and the inter-table dimension H in the closed mold state P1 changes, the clamp tool 23 fitted to the small diameter part 22b of the tie rod 22 and the tie rod 22 The gap with the flange portion 22a changes. Even in such a case, one or more optimal spacers 24 are selected from the set, and can be inserted into the gap.

  The connecting tool 21 as described above can be fixed using the tie rod 22 so that the upper table 3b and the lower table 3a are not opened. Therefore, for example, the upper and lower mold parts 2a and 2b are connected by the connecting tool 21 even when the lifting means 35 or the like connected to the upper table 3b is loosened and the tightening force is reduced. The inadvertent opening is suppressed.

  Moreover, the coupling tool 21 includes a spacer 24 that is inserted into the gap between the clamp tool 23 and the flange portion 22a of the tie rod 22 as well as preventing the flange portion 22a from being simply removed by the clamp tool 23. Therefore, by adjusting the thickness of the spacer 24 in accordance with the gap, the opening of the upper and lower mold parts 2a, 2b can be reliably suppressed with a simple configuration. Further, even when the thickness of the upper or lower mold part 2a, 2b is changed, it can be dealt with by making the thickness of the spacer 24 different.

  As shown in FIG. 5, the tire vulcanizer 1 of the present embodiment further lifts the lower mold with respect to the lower table in the closed mold state P1 between the upper table 3b and the lower table 3a. It is desirable to further include pressing means 30.

  The pressing means 30 includes, for example, an annular groove 31 that is recessed on the upper surface of the lower table 3a and concentric with the lower mold part 2a, and an annular pressure plate that is slidably disposed in the annular groove 31 up and down. 32.

  The annular groove 31 includes, for example, a main groove portion 31a that holds the pressure plate 32 slidably up and down, and a narrow sub-groove portion 31b adjacent to the lower side of the main groove portion 31a. A high-pressure fluid supply channel 33 is connected to the sub-groove 31b.

  The lower mold part 2 a is attached to the upper surface of the pressure plate 32.

  In such a pressing means 30, in a closed mold state and in a state where the coupler 21 is coupled, the high pressure fluid flows into the annular groove 31, so that the pressurizing plate 32 lifts the lower mold portion 2 a and the upper table 3 b. The upper mold part 2b and the lower mold part 2a can be tightened with a stronger force between the upper table 3a and the lower table 3a.

  Since such a pressing means 30 uses a high-pressure fluid, it can generate a large clamping force while having excellent durability. Further, since the pressing means 30 has an annular shape, a large tightening force can be applied uniformly to the mold part, and high-precision tightening can be performed.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 1 Tire vulcanizer 2a Lower mold part 2b Upper mold part 3a Lower table 3b Lower table 21 Connecting tool 22 Tie rod 22a Flange part 22b Small diameter part 23 Clamp tool 23b Inner peripheral surface 23c Clamp piece 24 Spacer 24a Inner peripheral surface 24b Ring piece 27 Cylinder device 30 Pressing means 35 Lifting means T Tire G Rigid core

Claims (6)

A tire vulcanizer comprising: a lower table to which a lower mold part is attached; and an upper table to which an upper mold part is attached, wherein the lower table and the upper table are relatively close and movable. ,
In a closed mold state in which the upper mold part and the lower mold part are closed by the close movement of the upper table and the lower table, a connecting tool for connecting the upper table and the lower table,
The connector is
A plurality of tie rods having one end fixed to one of the lower table and the upper table and extending up and down, and having a small diameter portion with a reduced outer diameter so as to form a flange portion at the other end;
A clamp that fits from the horizontal direction to the small diameter portion of each of the tie rods that penetrates the other of the lower table and the upper table, and prevents the flange portion from coming off;
A tire vulcanizer comprising: a spacer inserted into a gap between the clamp tool and the flange portion of the tie rod.   2. The tire vulcanizer according to claim 1, wherein the spacer has a plurality of types of thicknesses prepared in advance, and is one selected from the set.   The tire vulcanizer according to claim 1, wherein the spacer has an inner peripheral surface that matches a cross-sectional shape of the small diameter portion of the tie rod.   The said clamp tool contains a pair of clamp piece which has an internal peripheral surface which matched the cross-sectional shape of the said small diameter part of the said tie rod, and the cylinder apparatus which reciprocates the said clamp piece in the said horizontal direction. The tire vulcanizer according to any one of the above.   The tire vulcanizer according to any one of claims 1 to 4, further comprising pressing means for lifting the lower mold with respect to the lower table in the closed state. Further comprising elevating means for supporting the upper table so as to be movable up and down;
The tire vulcanizer according to any one of claims 1 to 5, wherein the elevating means moves the upper table up and down relative to the lower table and lowers the upper table so as to be in the closed mold state.

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