JPH0417775B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a tire vulcanizer.

(Prior art) A fixed lower mold installed on a vulcanizer frame, a movable upper mold that opens and closes vertically toward the fixed lower mold, and an upper mold elevating mechanism that vertically raises and lowers the movable upper mold. A tire vulcanizer (a tire vulcanizer) comprising: Press), for example, U.S. Patent No.
It is known from the specification of No. 3870443.

(Problems to be Solved by the Invention) The tire vulcanizers disclosed in the above-mentioned publications and elsewhere all have an upper mold that can be vertically moved up and down in order to carry the tire into the green tire mold. Moreover, the pressurization from the pressurizing device (hydraulic cylinder) is transmitted to the upper mold side.

Therefore, in order to facilitate the transport of green tires, the upper mold must be raised and lowered as much as necessary, and the stroke of the hydraulic cylinder must be made correspondingly longer. No.

This means that if a pressure drop occurs due to leakage of hydraulic fluid from the seal of the hydraulic line of the hydraulic cylinder during tire vulcanization, the gap between the mating surfaces of the upper and lower molds may exceed the opening limit. There is a risk that the vulcanizing medium inside the mold, that is, pressurized steam, high-pressure hot water, high-temperature, high-pressure gas, etc., may blow out to the outside, which may cause a serious accident.

The present invention solves the problems of the prior art, and
Improved safety, ease of operation, improved vulcanization accuracy,
Furthermore, it is an object of the present invention to provide a tire vulcanizer that can improve productivity.

(Means for Solving the Problems) The present invention provides a fixed lower mold installed on a vulcanizer frame, a movable upper mold that opens and closes in a vertical direction toward the fixed lower mold, and a movable upper mold. an upper mold elevating mechanism that vertically raises and lowers the vulcanizer, a pressurizing device provided on the upper side of the vulcanizer frame, and a pressurizing force transmitting device that transmits the pressurizing force of the pressurizing device to the movable upper mold. The above objective was achieved by using the following technical measures in a tire vulcanizer.

That is, in the present invention, the pressurizing device 8 is a cylinder tube 9 fixed to the upper side of the vulcanizer frame 1.
and a piston 10 which is slidably fitted into the tube 9, and is provided on the center line of the molds 11 and 12 in the vertical direction on the upper side of the vulcanizer frame 1, and has a pressurizing force. The transmission device 15 includes a transmission member 16 erected above the mold center on the upper mold 4 side, and the upper side of the transmission member 16 is movable up and down in the vertical direction with respect to the inside of the hollow parts 11 and 12. A relay member 17 for transmitting the pressing force of the piston 10 to the transmission member 16 is detachably provided between the piston 10 side of the piston 8 and the transmission member 16.

(Embodiments and Effects) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is a vulcanizer frame;
It consists of a base frame 1a on the lower side, a top frame 1b on the upper side, and a side frame 1c.

Although the figure shows a twin-type vulcanizer in which two vulcanizing molds are installed side by side, a single-type vulcanizer or other vulcanizers may be used.

2 is a vulcanizing mold, and a lower mold 3 installed on the base frame 1a and (toward) the lower mold 3.
It consists of a movable upper mold 4 that opens and closes in the vertical direction,
A cavity (not shown) is formed inside this vulcanization mold 2, and a green tire is charged into this cavity, and the inner surface of the tire can be shaped via a central mechanism such as a bladder provided on the lower mold 2 side. has been done.

Reference numeral 5 denotes an elevating table, which vertically raises and lowers the upper mold 4, and has a slide liner 7 fixed on the upper mold 4 and slidably guided by an elevating guide 6 provided on the side frame 1c. are doing.

Reference numeral 8 denotes a pressurizing device, and a cylinder tube 9 is fixed to the upper side of the vulcanizer frame 1, that is, the lower surface of the top frame 1b, with its axis aligned with the center vertical line of the vulcanization mold 2; It consists of a piston 10 fitted into this cylinder tube 9,
The piston 10 has an annular shape with a hollow part 11 inside, and the top frame 1b has a hollow part 12 corresponding to the hollow part 11. Hollow portions 11 and 12 that are vertically penetrated are provided on the center line of the mold.

The cylinder lid 13 is detachably attached to the lower end surface of the tube 9, and a piston return spring 14 is interposed in the tube 9 between the cylinder lid 13 and the lower surface side of the piston 10. There is.

Reference numeral 15 denotes a pressurizing force transmission device, and a transmission member 16 has a cylindrical shaft structure and is installed upright at the mold center on the upper mold 4 side.
and a relay member 17, and the transmission member 16 is
This embodiment is composed of a first transmission member 18 and a second transmission member 19.

The first transmission member 18 has an outwardly directed flange 2 at its lower end.
0, this outward flange 20 is installed and erected on the lifting platform 5 via a presser fitting 21 having a split structure, and a male thread 22 is formed on the upper part of the first transmission member 18. There is.

The second transmission member 19 has a female thread 23 at its lower end, and the male thread 22 of the first transmission member 18 is screwed into this female thread 23 to be screwed together. It is inserted into the hollow parts 11 and 12. That is, the upper side of the transmission member 16 is vertically movable up and down with respect to the hollow parts 11 and 12 on the vulcanizer frame 1 side. Furthermore, the second transmission member 19 has a slit 24 formed in the vertical direction, and an engagement step 25 is located at the lower end side of the piston 10 in the pressurizing device 8 in the mold closed state, as shown in FIG. It is formed on the outer periphery.

The relay member 17 consists of a pair of engaging arms 26 as shown in FIG. The sides are connected to each other by a telescoping cylinder 28, and through the operation of the telescoping cylinder 28, each inner circumferential arc surface 26A of the engagement arm 26 is aligned with the outer circumferential surface of the second transmission member 19, and the engagement stepped portion 25 It is said that it can be freely engaged and detached from the

In addition, in FIG. 2, 29 is a reed switch type limit switch, and 30 is an engagement arm 26.
It shows a stopper that restricts the opening position of the

Reference numeral 31 denotes an upper mold elevating mechanism, and as shown in FIG. 3, an electromagnetic brake 3 is attached to the top frame 1b.
The drive body 33 is a torque motor capable of forward and reverse rotation, and has a deceleration mechanism 34 on the output shaft side of the drive body 33. 36.

The first bevel gear 36 is supported by a bearing box 37 fixed to the top frame 1b, and the first bearing box 37 is loosely fitted into the slit 24 and faces inside the second transmission member 19. A vertical second bearing box 38 is housed in the member 19 and the second bearing box 38 is attached to the first bearing box 37, and the second bearing box 38 is further provided with a second bevel gear that meshes with the first bevel gear 36. 39 are supported. Furthermore, an elevating shaft 41 such as a screw shaft or a ball screw shaft is erected at the center of the upper die elevating table 5 via a fixture 40, and this elevating shaft 41 has its axis on the cylindrical axis of the transmission member 16. The transmission member 16 is inserted into the cylindrical interior of the transmission member 16, and is threaded through a female threaded cylindrical body 42 formed by a screw nut, a ball screw nut, etc. fixed in the boss of the second bevel gear 39.

Although the elevating mechanism 31 is shown as a screw type in the drawings as a means for converting rotational motion into linear vertical motion, it may also be of a rack and pinion type, for example.

Reference numeral 43 designates an upper mold height adjustment mechanism, in which a plurality of insertion/removal lock holes 45 for the adjustment handle 44 are formed in a radial arrangement in the middle of the first transmission member 18 in the height direction, as shown in FIG. A bracket 46 is extended downwardly from the transmission member 19, and a lock piece 48 having a knob 47 is supported by a spring 49 in the engaging direction, and the tip of the lock piece 48 is held at the end of the lock piece 48. 1 Lock hole 4 of transmission member 18
5 and can be freely connected and disconnected.

That is, by inserting the handle 44 into the other lock hole 45 with the lock piece 48 removed from the lock hole 45 and rotating it in the direction of the arrow in FIG. 4, the male screw 22 and the female screw 23 can be screwed together. As a result, the lifting platform 5 is moved up and down, and the height of the upper mold is adjusted. After adjustment, it is locked with the locking piece 48.

In addition, in FIGS. 1 and 6, 50 indicates a pump unit, and 51 indicates a liquid feeding (hydraulic) piping. As shown in FIG. 6, the pump unit 50 is connected to a hydraulic pump 55 from the outside via a filter 52, an air regulator 53, and an air switching valve 54.
The oil in the oil tank 56 is sucked up and pressurized through the filter 57, and the solenoid valve 5
8. Piping 5 via pressure switch 59 etc.
1 supplies pressure oil to each of the two pressurizing cylinders. In addition, in Figure 2,
60 is an upper and lower limit detection limit switch for the pressurizing piston, and 61 is its operating piece. Further, in FIG. 1, 62 is a lower dome, and 63 is an upper dome.

Next, the effect will be explained.

In FIG. 1, a movable upper mold 4 is placed on a fixed lower mold 3.
It shows a state in which the piston 10 has vertically lowered and has already been closed, and the engagement arm 26 of the relay member 17 is engaged between the piston 10 side and the transmission member 16, and pressurization is being performed by the lowering of the piston 10. ing. Assuming that the vulcanization work for the green tire in the vulcanization mold 2 is completed under such mold closing and pressurization, the transmission member 16 is transferred through the removal of hydraulic pressure in the pressure cylinder 9 and the opening and expansion of the relay member 17. Leave it free.

Next, by rotating the female screw cylinder 42 via the bevel gears 36 and 39 by driving the lift drive body 33, the lift shaft 41, which is a male thread, is raised, and the slide 7 is guided relative to the vertical lift guide 6. Through this, the movable upper mold 4 rises and is opened and retracted from the lower mold 3. In this case, the upper part of the transmission member 16 is raised and lowered within the hollow parts 11 and 12 provided on the side of the vulcanizer frame 1, and the upper part of the transmission member 16 is raised and lowered when the upper mold 4 is released from the mold. There is no interference with the sulfurizer frame 1 side, and the upper mold 4 can be lifted sufficiently high. Therefore, the vulcanized tire is removed from the lower die 3 by the lifting of the central mechanism, and then by the removal of the bladder, it is ejected from the vulcanizer via a tire unloader or the like, and the next vulcanizing operation can be carried out. Following the loading of a new green tire into the fixed lower mold 3 and pre-shaping of the inner surface of the tire by the central mechanism and bladder, the female thread cylinder 42 is used to close and pressurize the movable upper mold 4. This is done by lowering the lifting shaft 41 due to the reversal of the rotation, and the transmission member 16 also lowers together with this, and after the molds 3 and 4 are closed, the mold pressurization is performed by lowering the shaft 41 (see Fig. 1). By closing and locking the engagement arm 26 of the relay member 17 to the engagement step portion 25 of the transmission member 16 in the state, and lowering the pressure piston 10 of the pressure cylinder 9 under pressure, the relay member 17 is moved. transmission member 16 through
The pressurizing force is transmitted to the side, and mold clamping pressurization is performed. In addition, the height of the upper mold 4 can be easily adjusted by rotating the handle of the height adjustment mechanism 43, that is, the adjustment fitting 44, as described above, depending on the tire size and the vulcanization mold. It will be done.

(Effects of the Invention) According to the present invention, the relay member that transmits the pressurizing force of the piston to the transmission member is disengaged between the piston side of the pressurizing device and the transmission member installed upright on the mold center of the upper mold side. Because it is freely installed, pressurizing force can be transmitted to the upper mold without increasing (lengthening) the cylinder stroke of the pressurizing device during vulcanization. A short stroke type can be used. This means that
The stroke of the pressurizing device is short enough to apply the pressurizing force, and can be designed to be less than the safe opening amount of the vulcanizing type, so even if the pressure inside the pressurizing cylinder drops due to a malfunction, etc., the tightening stroke will remain the same. The above-mentioned mold opening can be reliably prevented by the transmission member and the relay member, and the ejection of the vulcanizing medium, etc. is prevented, resulting in safety.

Furthermore, since the stroke of the pressure cylinder is shortened, mold clamping can be done instantly and accurately.

Furthermore, even if the pressurizing force transmitting member is installed upright on the upper mold side, there is a hollow part on the mold center line on the vulcanizer frame side in which the transmitting member can be accommodated, so that the upper mold has sufficient mold capacity. The opening can be secured, and green tires can be inserted and molded tires can be taken out reliably, easily, and quickly, and productivity can be improved.

[Brief explanation of drawings]

Figure 1 is an overall longitudinal sectional front view of the embodiment of the present invention;
The figure is a sectional view taken along line A-A in Figure 1, and Figure 3 is a sectional view taken along line B-B in Figure 1.
4 is a sectional view taken along the line C--C, FIG. 5 is a sectional view taken along the line D--D, and FIG. 6 is an explanatory view of one example of the pressurizing pump unit. 1... Vulcanizer frame, 2... Vulcanizing mold, 3... Lower mold,
4... Upper mold, 8... Pressure device, 9... Pressure cylinder, 1
0... Pressure piston, 15... Pressure force transmission device, 16
... Pressure force transmission member, 17... Relay member for pressurization force transmission.

Claims (1)

[Claims] 1. A fixed lower mold installed on the vulcanizer frame;
A movable upper mold that opens and closes in a vertical direction toward the fixed lower mold, an upper mold lifting mechanism that vertically raises and lowers the movable upper mold, and a pressure device provided on the upper side of the vulcanizer frame; In a tire vulcanizer equipped with a pressurizing force transmission device that transmits the pressurizing force of the pressurizing device to the movable upper mold, the pressurizing device 8 is a cylinder tube 9 fixed to the upper side of the vulcanizer frame 1. and a piston 10 slidably fitted into the tube 9,
The upper part of the vulcanizer frame 1 is provided with vertically penetrated hollow parts 11 and 12 on the mold center line, and the pressurizing force transmission device 15 is a transmission member 16 erected above the mold center on the upper mold 4 side. The upper side of the transmission member 16 is vertically movable in the hollow parts 11 and 12, and the pressing force of the piston 10 is applied between the piston 10 side of the pressure device 8 and the transmission member 16. A tire vulcanizer characterized in that a relay member 17 for transmitting information to a transmission member 16 is provided in a manner that can be freely engaged and detached.