JP3327778B2 - Tire vulcanizer safety equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a tire vulcanizer.

[0002]

2. Description of the Related Art A conventional safety device for a tire vulcanizer will be described with reference to FIG. 3. Reference numeral 1 denotes a guide bracket, and this guide bracket 1 is fixed to a bolster plate (not shown) and an upper mold (not shown). ) Is attached to a bolster plate, and the bolster plate and the upper die are raised and lowered by a lifting cylinder (not shown).

Reference numeral 5 denotes an engagement hole provided at the upper end of the guide bracket 1, reference numeral 8 denotes a main body frame, reference numeral 4 denotes a lever whose upper end is pivotally supported on the top of the main body frame 8, reference numeral 2 denotes an upper and lower middle portion of the lever 4 and main body frame. 8 is an air cylinder interposed between the air cylinder 8 and the side portion 8. In the safety device for a tire vulcanizer, when the upper mold is raised to the ascending limit position and the upper mold is opened, the air cylinder 2 is operated in the contracting direction, and the lever 4 is moved to two points around the upper end. By swinging from the chain line position to the solid line position, the pin provided at the lower end of the lever 4 is engaged with the engagement hole 5 of the guide bracket 1 so that the bolster plate and the upper mold can be dropped even when the lifting cylinder fails. I try to prevent it.

[0004]

In the conventional tire vulcanizer safety device shown in FIG. 3, the upper end of the lever 4 is pivotally supported on the top of the main body frame 8, and the air cylinder 2 is connected to the lever 4
The height of the main body frame 8 is increased because it is interposed between the upper and lower middle portions and the side of the main body frame 8. In addition, even if the upper mold is stopped at the intermediate position below the ascending limit position, and an operator enters under the bolster plate and the upper mold to perform inspection and maintenance on the inner surface of the upper mold, Since the safety device is configured to prevent the bolster plate and the upper mold from falling only when the upper mold is raised to the upper limit position, an intermediate stopper (not shown) is provided separately. It is necessary to stop the mold at an intermediate position.

The present invention has been made in view of the above problems, and has as its object to reduce the overall height of the main body frame and eliminate the need for an intermediate stopper required for inspection and maintenance. Another object of the present invention is to provide a safety device for a tire vulcanizer that can reduce the cost.

[0006]

In order to achieve the above-mentioned object, a safety device for a tire vulcanizer according to the present invention is provided with a plurality of engaging portions on a side portion of a main body frame along a vertical direction. A bolster plate which is raised and lowered by the cylinder and a bracket on the upper mold side are provided with a cylinder and a shaft which is protruded by the cylinder and engages with one of the above-mentioned engaging portions.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a safety device for a tire vulcanizer according to the present invention will be described with reference to an embodiment shown in FIGS. 1 is a guide bracket, 2 is an air cylinder mounted on the guide bracket 1, 3 is a shaft that moves forward and backward by the air cylinder 2, 6 is a bolster plate on which the guide bracket 1 is fixed, and 12 is a proximity switch mounted on the guide bracket 1. , 8 are body frames, and the body frame 8
Are provided with a plurality of holes 11 along the vertical direction.

The right side of FIG. 2 shows a state in which the upper mold 13 is in the ascending time limit. The tire vulcanizer includes a bolster plate 6, a bolster platen 7, and a bolster platen 7.
And an upper mold 13 attached to a lower part of the upper mold. The bolster plate 6 is set on the upper surface and
The guide device includes a guide bracket 1 serving as a bracket, a cam follower incorporated in the guide bracket 1, a guide rail 9 installed on the main body frame 8, and an elevating cylinder 10.

Next, the operation of the safety device for the tire vulcanizer will be specifically described. This safety device, when the upper mold 13 is opened,
Even if the lifting cylinder 10 fails, the bolster plate 6
Also, it is provided to prevent the upper mold 13 from dropping and to ensure safety. That is, when the bolster plate 6 and the upper mold 13 rise and the upper mold 13 is opened, the air cylinder 2 attached to the guide bracket 1 operates in the extension direction, the shaft 3 projects, and the tip of the shaft 3 The bolster plate 6 and the upper mold 13 are prevented from dropping by inserting the portion into any one of the holes 11 provided along the vertical direction on the side of the main body frame 8.

At this time, the proximity switch 12 detects that the tip of the shaft 3 has been inserted into the hole 11 of the main body frame 8, and the lamp on the press operation panel is turned on to confirm safety . Further , instead of the hole 11, the shaft 3 may be hooked on a plate or the like affixed to a plurality of places in the vertical direction of the main body frame 8.

[0011]

As described above, the safety device for a tire vulcanizer of the present invention moves the air cylinder attached to the guide bracket in the extension direction when the bolster plate and the upper mold rise and the upper mold opens. The bolster plate is actuated to protrude the shaft, and the tip of the shaft is engaged with any one of a plurality of engaging portions provided along a vertical direction on a side portion of the main body frame. And the upper mold is prevented from falling, so that the upper end of the lever is pivotally supported on the top of the main body frame as in the conventional safety device, and the air cylinder is moved between the upper and lower middle part of the lever and the side of the main body frame. The overall height of the main body frame can be reduced as compared with the case of interposing.

Further, since the tip of the shaft is engaged with any one of a plurality of engaging portions provided along the vertical direction on the side of the main body frame, it is necessary for inspection and maintenance. The need for an intermediate stopper is eliminated. Further, since the cylinder and the shaft are provided on the bolster plate and the bracket on the upper mold side, the number of assembly parts can be reduced and the cost can be reduced as compared with the case where a lever or the like is required as in the conventional safety device. .

Further, when the safety device is mounted on the tire vulcanizer, it is only necessary to mount the bracket having the cylinder and the shaft on the bolster plate, so that the number of assembling steps can be reduced and the cost can be reduced from this point as well.

[Brief description of the drawings]

FIG. 1 is an enlarged front view showing an embodiment of a safety device for a tire vulcanizer of the present invention.

FIG. 2 is a front view showing the whole safety device.

FIG. 3 is a front view showing a conventional safety device for a tire vulcanizer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide bracket 2 Cylinder (air cylinder) 3 Shaft 6 Bolster plate 7 Bolster platen 8 Main frame 9 Guide rail 10 Elevating cylinder 11 Engagement part (hole) 12 Proximity switch 13 Upper die

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 33/00-33/76 B29C 35/00-35/18

Claims (1)

(57) [Claims] A plurality of engaging portions are provided on a side portion of a main body frame along a vertical direction, and each of the engaging portions is protruded by the cylinder and the bolster plate, which is raised and lowered by a lifting cylinder, and a bracket on an upper mold side. A safety device for a tire vulcanizer, comprising a shaft engaged with one of the parts.