JP4959299B2 - Piping connection structure of tire vulcanizer - Google Patents

Description

  The present invention relates to a pipe connection structure in a vulcanizing apparatus for a pneumatic tire mounted on an automobile or the like.

  As this type of tire vulcanizing apparatus, for example, one disclosed in Patent Document 1 or the like is well known, and as a pipe connection structure in the apparatus, there is one as shown in FIG.

This is based on the apparatus main body 104 side with respect to the inlet side pipe 102 and the outlet side pipe 103 for the vulcanization medium (steam, N ₂ gas, hot water, etc.) in the upper center mechanism 101 on the side including the container 100 (not shown). When the inlet side pipe 106 and the outlet side pipe 107 for the vulcanizing medium in the lower center mechanism 105 are connected (communication connection), respectively, an inlet side pipe connecting cylinder 108 attached upward to the lower center mechanism 105 and Each of the outlet side pipe connecting cylinders 109 is extended to connect the sealing material mounting portions 110 and 111 such as O-rings and D-rings of the inlet side pipe 106 and the outlet side pipe 107 to the inlet side pipe 102 and the outlet side pipe 103. It was connected by pressing on the connecting part.

  The upper center mechanism 101 is provided with a center post 112 for operating a bladder (not shown) so that it can be raised and lowered. A cylinder 113 for raising and lowering the center post 112 is attached to the lower center mechanism 105 upward. The tip of the piston rod of the cylinder 113 can be attached to and detached from the lower end of the center post 112 by a pair of hooks 114 that can be opened and closed by an opening / closing mechanism (not shown).

JP 2000-351120 A

  By the way, in the pipe connection structure as described above of the tire vulcanizing apparatus, a high sealing performance of the connecting portion is required. In the unlikely event that leakage occurs in the connecting portion, particularly when the vulcanization medium is hot water, high-temperature and high-pressure hot water will scatter, causing a problem in terms of safety.

  However, in the conventional pipe connection structure shown in FIG. 4, since the O-ring or D-ring is used as the seal material of the connection portion (seal material mounting portions 110 and 111), the seal surface and the seal material fixing portion are used. The degree of parallelism is important, and its management is very difficult.

  Further, in the connected state, it is necessary to always press the sealing surface with a force that overcomes the pressure of the vulcanizing medium, and there is a possibility that leakage occurs when the thrust of the cylinders 108 and 109 is reduced for some reason. There was also a problem of lack of reliability.

  The present invention has been made in view of the above-mentioned situation, and has a high sealing performance obtained by a simple means superior in terms of processing and assembling properties, and a pipe linking structure of a tire vulcanizing apparatus capable of improving safety. The purpose is to provide.

In order to achieve such an object, the pipe linking structure of the tire vulcanizing apparatus according to the present invention includes:
In the pipe connection structure of the tire vulcanizer that connects the mold side pipe and the apparatus side pipe detachably and passes the vulcanization medium,
In the connecting pipe portion of the mold side piping, between the V-packing and the inner peripheral surface of the connecting pipe portion by pressing the V-packing and the outer peripheral surface of the apparatus side piping inserted into the connecting pipe portion. Fitting a sealing device with a push ring to effect sealing;
An engagement portion is provided on the outer peripheral surface of the apparatus-side pipe to engage with the push ring at a predetermined insertion position and press the push ring to open the V-packing .

  The open end of the push ring is formed by a tapered hole.

  The apparatus side piping is characterized in that the state of connection with the mold side piping is held by mechanical connecting means.

  According to the pipe linking structure of the tire vulcanizing apparatus of the present invention, since the pipe connecting portion is sealed by using V-packing instead of the O-ring or D-ring, the parallelism between the sealing surface and the sealing material fixing portion. Is eliminated, and high sealing performance can be obtained by simple means that is superior in terms of processing and assembly, and safety can be improved. In addition, the durability of the V-packing in a situation where the attachment and detachment of the pipe is frequently repeated is effectively improved by the push ring.

  Hereinafter, the pipe connection structure of the tire vulcanizing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an enlarged cross-sectional view of a main part of a pipe connection structure in a tire vulcanizing apparatus showing an embodiment of the present invention, FIG. 2 is an enlarged view of a seal device, and FIG. 3 is an overall cross-sectional view of the pipe connection structure.

  As shown in FIG. 3, the tire vulcanizing apparatus includes a lower center mechanism 3 assembled to the apparatus main body 1 via a cylindrical bracket 2, and a lower mold 5 of a container 4 placed on the apparatus main body 1. The upper center mechanism 6 assembled | attached to the side is provided.

As shown in FIG. 1, the upper center mechanism 6 is configured such that the center post 10 for operating the bladder holds the V-packing 11 at the center of the substrate 9 that holds the inner peripheral edge of the lower end of the bladder 7 between the clamp ring 8. And slidably penetrates in the vertical direction, and enters the substrate 9 into two tubular upper male bayonets 12A and 12B (in the illustrated example, a vulcanizing medium (steam, N ₂ ) Gas / warm water etc.) (both inlet and outlet piping) are fixedly installed. Then, sealing devices 14A and 14B using V-packings are fitted into the lower large-diameter pipe portions (connecting pipe portions of the mold side piping) 13A and 13B of the upper male bayonets 12A and 12B, respectively. Note that the inner peripheral edge of the upper end of the bladder 7 is held by a holding member 26 provided at the upper end of the center post 10.

  As shown in FIG. 2, the sealing devices 14A and 14B are fitted into the lower large-diameter pipe portions 13A and 13B of the upper male bayonets 12A and 12B so that they cannot be pulled out and are slidable. For this purpose, push rings 15A, 15B formed by tapered holes 15a, 15b (see FIG. 1) having large lower diameters, V-packings 16A, 16B carried on the upper end surfaces of the push rings 15A, 15B, and V A plurality of compression coil springs 18A interposed in the circumferential direction via guide rings 17A and 17B between the upper end surfaces of the packings 16A and 16B and the step portions 13a and 13b of the lower large-diameter pipe portions 13A and 13B; 18B. In the figure, 19A and 19B are retaining rings for the push rings 15A and 15B. The V-packings 16A and 16B are formed by stacking a plurality of V-shaped cross-section packing rings.

  As shown in FIG. 3, the lower center mechanism 3 is configured such that a lifting table 21 can be lifted by a pair of left and right lifting cylinders 20 </ b> A and 20 </ b> B attached downward to the cylindrical bracket 2. The drive cylinder 22 for raising and lowering the center post 10 of the upper center mechanism 6 is attached upward. The drive cylinder 22 and the center post 10 are engaged and disengaged by a clamp mechanism (not shown) provided on the piston rod side of the drive cylinder 22.

  The lift table 21 includes an inlet side and outlet side pipe (apparatus side pipe) 23A that can communicate with the inlet side and outlet side piping parts of the two tubular upper male bayonets 12A, 12B of the upper center mechanism 6 described above. , 23B are fixed, the inlet side pipe 23A is connected to a vulcanization medium supply source (not shown) by an external pipe, and the outlet side pipe 23B is appropriately connected to the drain side.

  Further, the elevating table 21 accommodates the inlet and outlet pipes 23A and 23B in a double tubular shape so as to be engaged with and disengaged from the two tubular upper male bayonets 12A and 12B of the upper central mechanism 6 described above. The lower end portions of the long cylindrical members 25A and 25B respectively provided with possible cylindrical lower female bayonets 24A and 24B on the upper end portions are rotatably supported. Accordingly, the upper male bayonets 12A and 12B and the lower female bayonets 24A and 24B constitute a bayonet structure as a mechanical connecting means. The lower end portions of the long cylindrical members 25A and 25B are rotated by an actuator (not shown).

  Because of such a configuration, when shifting from the connection release state shown in the left half part of FIGS. 1 and 3 to the connection state shown in the right half part, the engagement / disengagement operation of the center post 10 and the drive cylinder 22 is performed. The pair of right and left elevating cylinders 20A and 20B is contracted regardless of the front and rear direction.

  At this time, in the above-described sealing devices 14A and 14B, the shoulder portions (engaging portions) 23a and 23b (see FIG. 1) formed on the inlet side of the lower center mechanism 3 and the upper side of the outlet pipes 23A and 23B are the push ring 15A. , 15B, the push rings 15A, 15B are pushed up against the spring force of the compression coil springs 18A, 18B to open the V-packings 16A, 16B, and the upper male bayonet 12A 12B between the inner peripheral surface of the lower large-diameter pipe portions 13A, 13B and the outer peripheral surface of the inlet and outlet pipes 23A, 23B of the lower central mechanism 3 inserted into the lower large-diameter pipe portions 13A, 13B. Will be sealed liquid-tight.

  Thus, the upper ends of the inlet and outlet pipes 23A and 23B of the lower center mechanism 3 are liquid-tightly inserted into the two tubular upper male bayonets 12A and 12B of the upper center mechanism 6 via the sealing devices 14A and 14B. The upper and lower pipe sections 13A and 13B of the upper male bayonets 12A and 12B have tubular upper female bayonets 24A and 24B, respectively. It protrudes upward from.

  Under this state, if the long cylindrical members 25A and 25B are rotated to a predetermined angle by the actuator (not shown) described above, the cylindrical lower female bayonets 24A and 24B integrally coupled to the long cylindrical members 25A and 25B are also rotated. The upper end engaging portion wraps in the vertical direction on the upper end surfaces of the lower large-diameter pipe portions 13A and 13B of the upper male bayonets 12A and 12B, and thereafter the lower engagement state is mechanically held.

  When shifting from the connection release state to the connection state and when shifting from the connection state to the connection release state, the V-packings 16A and 16B are not opened (free state) by the operation of the sealing devices 14A and 14B described above. Since the upper ends of the inlet side and outlet side pipes 23A and 23B of the lower center mechanism 3 are inserted and removed, an excessive force does not act on the V-packings 16A and 16B.

  Further, the upper ends of the inlet and outlet pipes 23A and 23B of the lower center mechanism 3 are automatically aligned by the tapered holes 15a and 15B of the push rings 15A and 15B, so that the push rings 15A and 15B The push-rings 15A and 15B are smoothly inserted into the V-packings 16A and 16B (in a free state) set to substantially the same inner diameter and the guide ring 17A without damaging the V-packings 16A and 16B. Of course, the outer diameters of the upper ends of the inlet and outlet pipes 23A and 23B of the lower center mechanism 3 are set slightly smaller than the inner diameters of the V-packings 16A and 16B (in a free state).

  Therefore, unlike the case of sealing the pipe connection part with an O-ring or D-ring as in the conventional example, the parallelism of the seal surface is not required, and high sealing performance is a simple means that is superior in terms of processing and assembly. To improve safety. Furthermore, the durability of the V-packings 16A and 16B under the situation where the attachment and detachment of the piping is repeated with high frequency is effectively improved by the push rings 15A and 15B.

  Further, in this embodiment, the connection state of the pipe connecting portion (seal portion) is mechanically held by the bayonet structure having the cylindrical lower female bayonets 24A and 24B, so that energy consumption can be reduced. Even when the vulcanization medium leaks, the pipe connecting portion (seal portion) is surrounded by the cylindrical lower female bayonets 24A and 24B, and the vulcanization medium is prevented from being scattered to improve safety. .

  Needless to say, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, the sealing devices 14A and 14B of the present invention can be applied to a pipe connection structure that always holds the connection state of the pipe connection part (seal part) with the thrust of the cylinder. On the other hand, the structure for mechanically holding the connection state of the pipe connection portion (seal portion) is not limited to the bayonet structure, and may be another mechanical connection structure.

It is a principal part expanded sectional view of the piping connection structure in the tire vulcanizer which shows one Example of this invention. It is an enlarged view of a sealing device. It is a whole sectional view of piping connection structure. It is principal part sectional drawing of the pipe connection structure in the conventional tire vulcanizing apparatus.

Explanation of symbols

3 Lower center mechanism 6 Upper center mechanism 10 Center post 12A, 12B Tubular upper male bayonet 13A, 13B Lower large-diameter pipe portion 14A, 14B Sealing device 15A, 15B Push ring 15a, 15b Taper hole 16A, 16B V-packing 23A , 23B Inlet and outlet piping of lower center mechanism 23a, 23b Shoulder 24A, 24B Tubular lower female bayonet

Claims (3)

In the pipe connection structure of the tire vulcanizer that connects the mold side pipe and the apparatus side pipe detachably and passes the vulcanization medium,
In the connecting pipe portion of the mold side piping, between the V-packing and the inner peripheral surface of the connecting pipe portion by pressing the V-packing and the outer peripheral surface of the apparatus side piping inserted into the connecting pipe portion. Fitting a sealing device with a push ring to effect sealing;
An engagement portion is provided on the outer peripheral surface of the apparatus-side pipe, wherein an engagement portion is provided that is engaged with the push ring at a predetermined insertion position and presses the push ring to open the V-packing. Piping connection structure of sulfur equipment.   The pipe linking structure for a tire vulcanizing apparatus according to claim 1, wherein an opening end portion of the push ring is formed by a tapered hole.   The pipe connection structure for a tire vulcanizer according to claim 1 or 2, wherein the apparatus side pipe is held in a state of connection with the mold side pipe by mechanical connection means.

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