JP3272574B2 - Mold clamping device for mold assembly for tire vulcanization - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable tire vulcanizing mold assembly, which is used when a tire vulcanizing mold is changed due to a change in the shape and size of a tire to be vulcanized. The present invention relates to a mold clamping device for a tire vulcanizing mold assembly for automatically attaching and detaching a mold.

[0002]

2. Description of the Related Art The present applicant has already proposed a vulcanizing apparatus for pneumatic tires mounted on automobiles and the like (see Japanese Patent Application Laid-Open No. 7-80846). The tire vulcanization equipment will be described with reference to FIGS. 6 and 7. The vulcanization equipment performs vulcanization by arranging a plurality of sets of tire vulcanization mold assemblies M (Ma, Mb, Mc,...). Station 1 (1a, 1b), the tire vulcanizing mold assembly M is opened, a vulcanized tire is taken out, and then an unvulcanized tire to be vulcanized is loaded and shaped (Shapi).
ng) to close the tire vulcanizing mold assembly M, the mold opening / closing station 2 (2a, 2b), the mold exchanging station 11 for exchanging bladders and the like, which are molds and consumables, and the vulcanization. A mold transfer trolley (mold conveying device) 3 (3a, 3) for transferring the tire vulcanizing mold assembly M between the station 1, the mold opening / closing station 2 and the mold changing station 11.
3b).

In this tire vulcanizing equipment, a tire vulcanizing mold assembly M is transferred from a vulcanizing station 1 to a mold transporting trolley 3.
And transported to the mold opening / closing station 2. After the tire vulcanizing mold assembly M carried into the mold opening / closing station 2 is coupled to the mold opening / closing device 6, the tire vulcanizing mold assembly M is opened by the action of the mold opening / closing device 6, and the same. The vulcanized tire is unloaded by the unloader attached to the mold opening / closing device 6, and the unvulcanized tire vulcanized by the attached loader is vulcanized next by the tire vulcanizing mold assembly M having unloaded the vulcanized tire. The tire is loaded, the tire is shaped during the closing process of the tire vulcanizing mold assembly M, and after the tire vulcanizing mold assembly M is closed, a heating and pressurizing medium is introduced into the tire. And then enclose and enter the tire vulcanization process.

[0004] Then, the connection between the tire vulcanizing mold assembly M, which has started vulcanization, and the mold opening / closing device 6 is released, and is again put on the mold transporting trolley 3, transported, and returned to the vulcanizing station 1. It has become. In addition, the applicant of the present application has proposed that an upper mold of a tire vulcanizing machine which automatically attaches and detaches an upper mold to and from a bolster plate and an upper hot plate when a tire mold is changed due to a change in size and type of a tire to be vulcanized. Clamping device (Japanese Patent Laid-Open No. 2-13)
0109) has already been proposed.

[0005] The outline thereof will be described with reference to FIGS. 8 and 9.
Clamp rod 79 having T-shaped clamp claw 80 formed at the tip
Is rotatably incorporated into a bolster plate 75 of a tire vulcanizer via a screw, and a clamp groove 50 that passes or locks the T-shaped clamp claw 80 according to the rotation angle of the clamp rod 79 is clamped on the upper mold 90 side. It is formed on an auxiliary plate 89.

In the upper mold clamping device of this tire vulcanizer, the upper mold 90 and the lower mold are carried into the tire vulcanizer and seated at a proper position on the lower hot plate. The plate 75 is lowered to bring the upper heating plate 77 into close contact with the upper die 90 (clamp auxiliary plate 89), and then insert the T-shaped clamp claw 80 into the clamp groove 50 of the upper die 90. When the clamp rod 79 is rotated through the horizontal lever 83, the T
The U-shaped clamp claws 80 are engaged with the clamp grooves 50.

When the clamp rod 79 rotates, the male screw 8
5 is moved upward by screwing of the female screw 86 into the upper die 9.
0 is attracted to the upper heating plate 77 side and tightened. When the clamp bar 79 rotates to a predetermined position, the lock pin 61 is moved in the direction of the clamp bar 79 to lock the clamp bar 79. Note that 57 to 60 are locking cylinders, 62 is the lock pin 61 and the clamp rod 79 is always on.
A spring 63 is a pressure fluid chamber for pulling back the lock pin 61 when the lock is released.

[0008]

The mold opening / closing station 2 (2a, 2a) of the tire vulcanizing equipment shown in FIGS.
b) includes a mold opening / closing device 6 (6a, 6b), an unloader 7 (7a, 7b) for taking out a vulcanized tire, a loader 8 (8a, 8b) for bringing in an unvulcanized tire, and the like. Since the exchange station has a mold opening / closing device, hanging tools, etc.,
It has the advantages of improving the operation rate and productivity and saving the installation space. However, the replacement of the tire vulcanizing mold and the like is not necessary for the tire vulcanizing machine shown in FIGS. The mold clamping device cannot be applied, and the dangerous work of attaching and detaching the tire vulcanization mold close to 200 ° C depends on the manual work of the operator. Depending on the required time, the vulcanization cycle time of the tire may be reduced. Crazy.

When the upper mold clamping device shown in FIGS. 8 and 9 is applied to a tire vulcanizing mold assembly, the tire vulcanizing mold assembly is transferred as described above. Therefore, a practical problem arises as to how to treat wiring or piping of the upper mold clamping device. Also, since the number of tire vulcanizing die assemblies including spare ones increases, the number of upper die clamping devices also increases, which increases equipment costs.

When the upper mold clamping device of the tire vulcanizer shown in FIGS. 8 and 9 is mounted on the mold opening / closing device,
Although the above problem is eliminated, there is no means for securely attaching and detaching the mold clamp portion and the driving device, and if there is a problem with this attachment and detachment, the tire vulcanizing mold which is a heavy object falls,
Accordingly, the equipment is damaged or an accident occurs. The present invention has been made in view of the above problems, and its object is to reduce the dangerous work of the worker, to stably operate the tire vulcanizing equipment, and to improve the production. It is an object of the present invention to provide a mold clamping device for a mold assembly for tire vulcanization, which can improve the performance.

[0011]

In order to achieve the above object, the present invention provides a vulcanizing station for arranging a plurality of tire vulcanizing mold assemblies M side by side, and a vulcanizing station for the tire vulcanizing mold. A mold opening / closing station for opening the mold assembly M, taking out the vulcanized tire, then carrying in the unvulcanized tire to be vulcanized, shaping and closing the tire vulcanizing mold assembly M; A mold changing station for opening the vulcanizing mold assembly M and exchanging mold components and bladders, and a mold transporting device for transferring the tire vulcanizing mold assembly M between them. In the tire vulcanizing equipment, a clamp rod 26 capable of entering and leaving a mold mounting plate 17 for mounting a tire vulcanizing mold 21 and a clamp rod for clamping the tire vulcanizing mold 21 to the mold mounting plate 17. 26, a spring body 30 A baffle plate 39 which is slidably mounted on the mold elevating plate 15 of the mold opening and closing device 6 in the vulcanizing equipment and releases the clamping force during forward movement, and the mold elevating and lowering opposed to the clamp rod 26. Clamp rod rotation drive rod 34 rotatably incorporated in plate 15
And a rotation drive means 43 for driving the clamp rod rotation drive rod 34 (claim 1).

In the mold clamping apparatus for the tire vulcanizing mold assembly, the key groove 26b formed at an appropriate position of the clamp rod 26 and the key groove 26 when the baffle plate 39 is retracted.
b may be provided with a keeper plate 33 to be fitted to the b.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the tire vulcanizing mold clamping device of the present invention will be described with reference to FIGS. M is a tire vulcanizing mold assembly used in the tire vulcanizing equipment, and 15 is a mold of a mold opening / closing device 6 (6a, 6b) (see FIG. 6) provided in the mold exchanging station 11. An elevating plate is assembled to the fixed frame 12 via a rail 13 and a guide 14 so as to be able to move up and down. The mold elevating plate 15 is moved up and down by driving means (not shown).

The tire vulcanizing mold assembly M includes a tire vulcanizing mold 21 and a mold mounting plate in which an upper mold portion of the tire vulcanizing mold 21 is mounted by a clamp device described in detail later. 17 and the mold mounting plate 1 via the heat insulating plate 18
A hot plate 19 attached to the tire 7 by known means such as bolts; and a substrate (not shown) in which the lower mold portion of the tire vulcanizing mold 21 is attached by known means via an insulating plate and a hot plate. A spacer 23 for regulating the distance between the substrate and the mold mounting plate 17, a lock plate 24 slidably mounted on the mold mounting plate 17 with the block 25 as a guide,
A tie rod 22 connects the substrate and the mold mounting plate 17 via the lock plate 24.

The tie rod 22 and the lock plate 24 are used to hold the mold mounting plate 17 up and down.
And an attaching / detaching device 16 having a configuration similar to that of the block 25 are assembled across the mold mounting plate 17 and the mold elevating plate 15. The mold clamping device is roughly divided into a clamp portion A that is incorporated into each tire vulcanizing mold assembly M to clamp the tire vulcanizing mold 21 to the mold mounting plate 17 and a mold elevating plate 15. An operating unit B is incorporated to operate the clamp unit to lock and unlock.

The clamp section A of the mold clamping apparatus is
A clamp rod 26 having a T-shaped clamp claw 26a formed at its lower end so as to be slidable (rotatable and vertically movable) into the mold mounting plate 17, and a flange bolted to the mold mounting plate 17 via a fixing ring 29; 28, and a small pressing force which is inserted between a flange 26c formed at an intermediate portion of the clamp rod 26 and the flange 28 and presses down the clamp rod 26 against frictional resistance.
6 and a spring formed at the lower end with a flange 31a which is slidably ascended and descended into the fixing ring 29 and abuts against a flange 29a formed inside the upper end of the fixing ring 29 to regulate the rise. A case 3 and a nut 3 screwed into the clamp rod 26 with a large clamping force inserted into the spring case 31 and clamping the mold 21 to the mold mounting plate against the pressing force of the compression spring 27.
2 and a spring body 30 provided to the clamp rod 26 via the spring case 31 and a clamp shelf 20a which is fixed to the mold 21 and passes or locks the clamp claw 26a depending on the rotation angle of the clamp claw 26a. Block 20.

The clamp claw 26a is connected to the clamp shelf 20.
a, the nut 3 is set so as to create a gap between the flange 29a and the flange 31a.
The screwing amount of No. 2 is adjusted in advance. In this embodiment, when the clamp claw 26a is locked to the clamp shelf 20a, the keeper plate 33 that fits into the key groove 26b formed near the lower end of the clamp rod 26 is provided on the lower surface of the mold mounting plate 17. Bolts are tightened.

An operating portion B of the mold clamping device is slidably (rotated and raised and lowered) coaxially with the clamp rod 26 of the mold elevating plate 15 and has a square head 26d formed at the upper end of the clamp rod 26. Square hole 34 to fit in
a drive rod 34 formed at the lower end, a spring case 35 bolted to the upper surface of the mold elevating plate 15, and a flange 34 formed integrally at the lower end of the drive rod 34.
b and a compression spring 36 inserted between the upper end flange of the spring case 35 to apply a force required to push down the drive rod 34 against frictional force to the drive rod 34, and an upper end of the drive rod 34 And a baffle plate 3 slidably mounted on the mold elevating plate 15 with a block 38 bolted to the lower surface of the mold elevating plate 15 as a guide.
9, a cylinder 39a for moving the baffle plate 39 fixed to the mold elevating plate 15 and connecting the rod to the baffle plate 39;
A rod 41 connected via a pin 40 to a lever 42 fixed to an adjacent drive rod; a driving means 43 (in this embodiment, an air cylinder) for swinging the lever 42;
And a mold clamp position holding device 44 for entering and exiting a cotter that can be engaged with the recess 42a formed in FIG.

The operating unit B of the mold clamping device is designed to open and close the mold of the mold opening / closing station 2 in consideration of the processing when a plurality of molds are exchanged in parallel in case of trouble. It is desirable that the device 6 is also provided. Further, the mold changing station may be omitted and the mold changing may be performed by the mold opening / closing station depending on the production amount of the tire.

Next, the operation of the tire vulcanizing mold clamping device shown in FIGS. 1 to 5 will be specifically described. Normally, the clamp claw 26a is at an angle at which it is locked to the clamp shelf 20a, there is a gap between the flange 29a and the flange 31a, and the compression reaction force (clamp force) of the spring body 30 causes
The tire vulcanizing mold 21 is attracted and clamped to the mold mounting plate 17 via the spring case 31, the nut 32, the clamp rod 26, and the block 20, and the clamping force is applied between the spring case 31 and the nut 32. The rotation of the clamp rod 26 is prevented by the friction torque or the like, and the rotation of the clamp rod 26 is also prevented by the fitting between the key groove 26b and the keeper plate 33, and the clamped state is maintained.

When the clamped state is released and the tire vulcanizing mold 21 is replaced, the baffle plate 39 is advanced (see the two-dot chain line in FIG. 3B) and the mold lifting plate 1 is moved.
5 is lowered, first, the square head 26d at the top of the clamp rod 26 is inserted and engaged with the square hole 34a of the drive rod 34,
Next, the baffle plate 39 contacts the upper surface of the spring case 31,
The spring case 31 is pushed down, comes into contact with the attachment / detachment device 16, and the lowering of the mold elevating plate 15 stops.

At this time, the clamp rod 26 is
The key groove 26b is disengaged from the keeper plate 33 by the action of
A gap is generated between a and the clamp shelf 20a. During this time,
If a phase shift occurs between the square head 26d and the square hole 34a, the drive rod 34 is pushed up against the pushing force of the spring 36, and the parts are not damaged.

Further, after the cotter of the clamp position holding device 44 is retracted, the driving rod 34 is rotated by the driving means 43 to set the clamp claw 26a at an angle which passes through the clamp shelf 20a. In addition, the square head 26d to the square hole 34a
When the insertion is not completed, the drive rod 26 is swung and rotated, and when the phases of the square head 26d and the square hole 34a match, the insertion engagement of the two is performed by the action of the spring 36. Next, the drive rod 34 is rotated to the above angle.

Next, the mold mounting plate 17 is connected to the mold elevating plate 15 by the attaching / detaching device 16, and the lock plate 24 is retracted by the driving means (not shown) to release the engagement with the tie rod 22. Then, when the mold elevating plate 15 is lifted, the mold mounting plate 17 is raised together with the mold elevating plate 15 while leaving the mold 21, and then the mold 2 is removed from the mold 21 by removing the attachment between the mold 21 and the substrate.
1 can be exchanged.

After exchanging the mold 21 by using a forklift or other hanging tools, the mold 21 is clamped to the mold mounting plate 17 in the reverse procedure. When the mold elevating plate 15 is lowered for this clamp, there is a phase shift between the clamp claw 26a and the clamp shelf 20a, and the lower surface of the clamp claw 26a is
When it comes into contact with Oa, the clamp rod 26 and the drive rod 34 are relatively pushed up against the pushing force of the springs 27 and 36, thereby avoiding damage to parts. In such a case, the drive rod 34 is swung and rotated so that the clamp claws 26a
Is at an angle through which it passes through the clamp shelf 20a, the spring 27
The clamp rod 26 and the drive rod 34 are lowered by the action of the spring 36 and the clamp pawl 26a passes through the clamp shelf 20a.

When it is desired to open the mold 21 for taking out a tire or the like, the mold elevating plate 15 is lowered in a state in which the baffle plate 39 is not advanced but is retracted (solid line state in FIG. 3A). Even if the attachment / detachment device 16 abuts and the descent is stopped, the baffle plate 39 does not abut on the spring case 31. Therefore, the mold clamping force is not released, and even if the drive rod 34 is rotated by mistake, Other torque between the spring case 31 and the nut 32 and the clamp rod 2
6, the clamp rod 26 does not rotate and the clamped state is maintained.

In this state, the connection between the mold lifting plate 15 and the mold mounting plate 17 is performed by the attachment / detachment device 16, and the lock plate 24 is moved to release the connection between the mold mounting plate 17 and the tie rod 22. , Mold lifting plate 15
Is raised, the upper mold portion of the mold 21 rises together with the mold mounting plate 17, and the mold 21 is opened. When the mold 21 is closed by closing the mold 21 by lowering the mold elevating plate 15, the mold assembly is ready to be transferred.

[0028]

As described above, the mold clamping apparatus for the tire vulcanizing mold assembly of the present invention has the following advantages. (1) The spring body 30 and the clamp rod 26 are used during tire vulcanization except when releasing the mold clamp. With this, a clamping force is applied to the clamped claw 26a and the clamp shelf 20a, so that the tire vulcanizing mold 21 is clamped on the mold mounting plate, and (2) for exchanging the mold parts. To release the clamp, use baffle plate 3
9, the mold elevating plate 15 is lowered to engage the driving rod 34 with the clamp rod 26, and the clamping force by the spring body 30 is released, so that the driving device and the driving rod 34 When the rod 26 is rotated to set the clamp claw 26a and the clamp shelf 20a to the locking position or the passing position, and (3) when the tire vulcanizing mold 21 is to be opened in a clamped state for taking out the tire or the like, The baffle plate 39 is retracted, and the mold elevating plate 15 is lowered. In this case, the clamp rod 26
Since the clamping force of the spring body 30 that engages with the driving rod 34 is not released, if the output torque of the driving device is properly selected, even if the driving device may malfunction, (4) When the baffle plate 39 is retracted except when the baffle plate 39 is moved forward to apply a clamping force to the spring body 30, the clamp rod 26 is not rotated. The keeper plate 33 is engaged with the key groove 26b formed in the above, and the rotation of the clamp rod 26 is mechanically prevented, so that a double safety state is obtained. The operation of the tire vulcanizing equipment can be stably performed, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a mold clamping device of a mold assembly for tire vulcanization of the present invention.

FIG. 2 is an enlarged vertical sectional side view taken along line aa of FIG. 1;

3A is a cross-sectional plan view taken along line bb in FIG. 2, and FIG. 3B is a vertical cross-sectional view taken along line ee in FIG.

FIG. 4 is a cross-sectional plan view showing one embodiment along the line cc in FIG. 2;

FIG. 5 is a cross-sectional plan view showing another embodiment along the line cc in FIG. 2;

FIG. 6 is a plan view showing the entirety of a tire vulcanizing facility already proposed by the present applicant.

FIG. 7 is a vertical sectional front view taken along the line dd in FIG. 6;

FIG. 8 is a vertical sectional side view showing an upper mold clamping device of a tire vulcanizing device already proposed by the present applicant and others.

FIG. 9 is a cross-sectional plan view taken along line ff of FIG. 8;

[Explanation of symbols]

1 (1a, 1b) Vulcanization station 2 (2a, 2b) Die opening / closing station 3 (3a, 3b) Die transport device 6 (6a, 6b) Die opening / closing device 11 Die changing station 15 Die elevating plate 17 Die mounting plate 21 Tire vulcanizing mold 26 Clamp rod 26b Key groove 30 Spring body 33 Keeper plate 34 Clamp rod rotation drive rod 39 Baffle plate 43 Rotation drive means of clamp rod rotation drive rod 34 M (Ma, Mb) , Mc, ...) Mold assembly for tire vulcanization

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 33/20 B29C 33/02 B29C 35/02

Claims (2)

(57) [Claims] 1. A vulcanization station 1 in which a plurality of tire vulcanizing mold assemblies M are arranged and vulcanized, and a vulcanized tire is taken out by opening the tire vulcanizing mold assemblies M and then vulcanizing. A mold opening / closing station 2 for loading and shaping an unvulcanized tire to be vulcanized and closing the tire vulcanizing mold assembly M, and opening the tire vulcanizing mold assembly M to open a tire vulcanizing mold. Mold changing station 11 for changing components and bladders of mold 21
And a mold transporting device 3 for transferring the tire vulcanizing mold assembly M between them,
Mold mounting plate 17 for mounting tire vulcanizing mold 21
, A spring 30 for applying a force for clamping the tire vulcanizing mold 21 to the mold mounting plate 17 to the clamp rod 26, and a mold opening / closing device 6 in the tire vulcanizing facility. A baffle plate 39 slidably assembled to the mold elevating plate 15 to release the clamping force during forward movement, and a clamp rod rotatably incorporated in the mold elevating plate 15 opposite to the clamp rod 26. A mold clamping device for a tire vulcanizing mold assembly, comprising: a rotation drive rod (34); and a rotation drive means (43) for the clamp rod rotation drive rod (34). 2. The tire mounting device according to claim 1, further comprising a key groove formed in an appropriate position on said clamp rod, and a keeper plate fitted into said key groove when said baffle plate is retracted. Mold clamping device for sulfuric acid mold assembly.