JPS6161813A - Safety device of tire vulcanizing press - Google Patents

Abstract

PURPOSE:To shorten the cycle time of the titled press and prevent a tire under vulcanization from bursting and a spacer from colliding against a pressure cylinder by a structure wherein a locking mechanism to hold a rod and a limit switch, which is located on the rod so as to oppose to a cam, are provided. CONSTITUTION:Because a spring 44, which upwardly energizes a rod 43 engaging with a hook rod 41 installed in upright position on an elevating table 2, a locking mechanism 42 and a limit switch 45, which is located on the rod 43 and opposes to a cam formed on a pressure cylinder 10, are provided, the increase of the stroke of the pressure cylinder responding to the thickness of molds 5 and 6 is unnecessary, resulting in enabling to shorten the cycle time of the titled press. When the limit switch 45 is turned OFF after the completion of vulcanization and successive lowering of the pressure cylinder 10 and resultant separation of the cam 40 from the limit switch 45, the rocking of a spacer in the direction toward the center of a press becomes impossible, resulting in preventing the spacer 12 from colliding against the pressure cylinder 10. Further, if the decrease of the hydraulic pressure for pressing occurs during vulcanization and the molds 5 and 6 start to open themselves and consequently ascend by the dimension of a gap A, the switch 45 is turned ON and the resultant electric signal shuts off all the inner pressures for vulcanization, resulting in enabling to prevent the tire under vulcanization from bursting.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to a spacer which is interposed between a pressure cylinder and an elevating cylinder to transmit the pressurizing force of the pressure cylinder to the mold when the mold is closed. Tire safety equipment [related to K], which is movable on the same lifting table.

(Prior art) The tire curing press already proposed by the applicant was
．． To explain using Figure 3.4, (1) is the press frame, (2) is the lifting table, (3) is the heat insulating plate, (4) is the upper heating plate, (5) is the upper mold, and (6) is the lower part. Mold, (a)
is the vulcanized tire, (8) is the lower heating plate, (9) is the heat insulating plate, the chain is the pressure cylinder, a is the auxiliary cylinder, (L is -
(13 is a heat medium supply device to the inside of the tire, and the auxiliary cylinder housing υ is fixed to the side bracket (L4) of the press frame (1) with a bolt Matasaki, and its rod O
Q and the lifting table (2) are connected by screws. The pressure cylinder (hydraulic cylinder (1) (11) is
Mounting seat (17) on the top of the press frame (1)! When the lifting table (2) is fixed to F-Pol He and is lowered, the lifting table (2) is fixed to the spacer a described later.
The upper and lower molds (5) and (6) are tightened with an extremely short tightening stroke. The lifting table (2) and the heat insulating plate (3), the upper hot plate (4), the upper hot plate (4) and the upper mold (5), the lower mold (6) and the lower hot plate (
8), Lower part-7,) The plate (8) and the heat insulating plate (9) are fixed to the press frame (1) with bolts not shown. Further, the spacer (12) can be raised and lowered together with the elevating table (2) as shown in Fig. 3.4, and is movable in the horizontal direction (72). That is, a bolt (a) is attached to one end of the lifting table (2) to attach a bracket (1G).
are fixedly installed, and a shaft (231) is fitted on the bracket (11) so that it can slide and rotate in the vertical direction, and a nut ( ) are screwed together, and a washer (A) and a bearing holder with a thrust bearing register are fitted onto the lower shaft (C) of the same nut (C), and the book: 3-12D and bearing holder 4 are inserted. A spring (21) is interposed between the bushings Qυ to urge the shaft Q3 upward, and washers <3(e
C3υ is located. In addition, the connecting part 04 at the tip of the arm (32') protruding from the slider 02 is fitted onto the shaft (c) between the bushings Qυ and the pier CA is stopped.
The spacer (2) is supported by a vertical axis (c) so as to be movable in the horizontal direction, and when the rod (toward) of the pressurizing cylinder is separated, the spacer (2) is raised by a spring (to). Due to the axis (c) that is being moved, the lower end of the sax-cer az rises slightly above the top surface of the lifting table (2), creating a gap between the sx-cer (I2) and the lifting table (2), and the above-mentioned Horizontal movement is possible.Also, as shown in Figure 3, there is an example of a lever protruding from the arm (32') and an elevator table (2).
) is the rod end of the cylinder (to) attached to the joint (2)
The system is pivoted through the cylinder (G), and by the expansion and contraction movement of the cylinder (G), the -Ser U swings in the direction of the arrow around the axis (C), and (
It is designed to move between the a) position and the b) position. (37i) is a height-adjustable liner attached to the head of the mackerel, which is vulcanized into the press by an unvulcanized tire carrying device (not shown) at the standby position of the press shown on the right side of Figure 2. Transport the tire (a) and place it in the lower mold (6).
) on the auxiliary cylinder (11) (lυ
Extend the lot * (1119), lower the table (2), the heat insulating plate (3), the upper heating plate (4), and the upper mold (5) together and position them on the lower mold (6), Next, the rod of the cylinder (c) is operated in the extension direction.Then, the spacer U moves from the → position shown in FIG. That is, the pressurizing cylinder (101) is placed directly under the lot 90ω. Next, the pressurizing cylinder (IQ is supplied with pressure fluid and the lot 90ω) is extended, and the
Tighten the upper mold (5) and lower mold (6) through the elevating table (2). When the vulcanized tire is taken out after vulcanization, the pressure cylinder (1 (1 liter lot) 4%) is pulled up. Then, Su is - Sir Q ■
is floated by spring Q1. Next, when the rod of cylinder 09 is actuated in the retracting direction, auxiliary cylinder (11) moves horizontally from position (a) in FIG. )(1
1) When the IG+ is pulled up, the upper mold (5) side is lifted up as shown on the right side of Figure 2 via the lifting table (2), and the vulcanized tire is taken out. It has become so.

(Problems to be Solved by the Invention) In the tire curing press shown in Figs. 2 and 3.4, the stroke of the pressure cylinder Ql is increased to accommodate changes in the thickness of the mold. (1) Cycle time is long. (n) In the unlikely event that the hydraulic power source system is damaged, the upper and lower molds (5) and (6) will open due to internal pressure, causing the tire being vulcanized to burst. (The ms collides with the pressure cylinder Ql when the -cer 02 swings toward the center of the press.) There was a problem.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and is provided between a pressure cylinder and an elevating table to increase the pressure force of the pressure cylinder during all mold clamping. In a tire curing press in which a spacer that communicates with the mold is movably provided on the elevating table, a cam provided on the pressure cylinder and a hook bar provided upright on the elevating table engage with the hook rod. It consists of a rod, a spring that biases the rod upward, a locking mechanism that grips the rod during tire vulcanization, and a limit switch that is attached to the rod opposite the cam. Regarding the safety device of the tire vulcanizing press, its purpose is to shorten tickle time. It can prevent tires from bursting during vulcanization. Another object of the present invention is to provide a safety device for a tire curing press that can prevent a spacer from colliding with a pressurizing cylinder.

(Example) Next, the safety device of the tire curing press of the present invention will be explained with reference to FIG.
Mouse 1 (2G (c) (32') is the same part as in Figures 2 to 4, and the frame (1) has a rectangular cutout window inside, and a heat insulating plate ( 9) and a lower hot plate (8) are attached to the lower hot plate (3) via bolts, and several lower molds (6) are attached to the lower hot plate (3) via bolts. Brackets (to) are provided on both sides of the part (1), and a pair of fluid pressure cylinders (to) are attached to each bracket 66) via pins 0η, and rods of the cylinders (to) are attached to each bracket (66). Tip (lower end)
(38a) is screwed to the lifting table (2). In addition, the lower surface of the lifting table (2) has an upper heating plate (
3) and the upper heating plate (4) are fixed with bolts or the like. Further, an upper mold (5) is fixed to the upper hot plate (4) with bolts. Also, the above lifting table (2)
A bracket H'J is fixed to the upper surface via a bolt, and a pin hole is provided at the right end of the bracket (11), and a shaft (C) is fitted into the pin hole, and the coaxial (to) and It is connected to the column 2 via the f-arm (32'), making it possible to swing between the center of the press and the outside of the press using a fluid pressure cylinder, etc. (not shown). In addition, a pressure cylinder (101) is fixed to the upper inner surface of the frame (1) with a bolt, and a cam (decoy) is provided on the side of the rod. The hook rod (AI) is provided with a hook at its upper end, and its lower end is screwed to the lifting table (2). By clamping the Shirorad (43) by spring force and applying fluid pressure, the rod (43) will be released. Also, the lower end of the rod (the right side of the lower end of the rod is hook-shaped 't)') s Lower end On the left side, a limit switch (c) is fixed with a bolt. Also, a hole is provided at the upper end of the rod (4), and the lower end hook of the tension spring 04 is engaged with the hole. The upper end hook of the tension spring (44) engages with a rod-shaped member (Ae) integrated with the frame (1), and the spring force of the tension spring (fence) urges the rod (43 upward. 07) is a pressurized air supply source (a 4-way solenoid valve that controls the pressurized air from the 4 wings,
The four-way solenoid valve (47) is 1. One port is connected to the head piston side (the other side) of the piston valve for controlling the internal pressure of vulcanization.
The other port is connected to the locking mechanism (4'IJ).

The hook rod Ωυ is provided to always maintain a constant gap (A) between the cam (41) and the limit switch (c) even if the thickness of the upper and lower molds (5) and (6) changes.

(effect) Next, the operation of the tire curing press will be explained.

FIG. 1 shows the tire curing press being vulcanized. At this time, there is a predetermined gap (N) between the cam (4 (lI) and the detection roller of the limit switch (49).

When vulcanization is completed, the rod of pressure cylinder a rises due to fluid pressure, and the cam (41) contacts and pushes the detection roller of limit switch θ, and at this time, pressure cylinder a An electric signal to stop the rod (2) and an electric signal to swing the spacer (L) to the retracted position are obtained, and the respective operations are performed, and then the hydraulic cylinder (2) is activated.
) operates in the contraction direction and the press opens. Take out the vulcanized tires that were in the upper and lower molds (5) and (6), bring in the green tires, close the press again, and press it.
oscillates around the center of the press. At this time, if the pressure cylinder (10) is lowered and the cam (4G) is away from the limit switch (c), the limit switch (
If the four cylinders are OFF', the spacer a2 cannot swing toward the center of the press, and the spacer α2 is prevented from colliding with the pressurizing cylinder Q. Furthermore, the four-way solenoid valve (47) in FIG. 1 is shown moving to the left during vulcanization. At this time, the locking mechanism G121 is gripping the rod (43tl). If the pressurizing fluid pressure decreases during vulcanization, it will depend on the vulcanization internal pressure), the upper and lower molds (41 (5
) begins to open and rises by a certain gap (8).Then, the limit switch (49 must be turned on).
The electrical signal obtained at that time shuts off all internal vulcanization pressure and issues an abnormality alarm. In addition, a hook stick (4
υ pulls down the hook part of the rod (43), and then removes the upper and lower molds (
5) Regardless of the thickness change in (6), there is always a constant gap (8
can be obtained.

(Effects of the Invention) As described above, the present invention includes a soother which is interposed between the pressure cylinder and the lifting table and transmits the pressing force of the pressure cylinder to the mold when all the molds are closed. In a tire vulcanizing press that is movably installed on an elevating table, a cam provided on the pressure cylinder, a hook bar provided upright on the elevating table, a rod that engages with the hook frame, and a rod that is moved upwardly. It consists of a biasing spring, a locking mechanism that grips the rod during tire vulcanization, and a limit switch mounted on the rod opposite the cam girth, which responds to changes in the thickness of the mold. Therefore, there is no need to increase the stroke of the pressurizing cylinder, and the cycle time can be shortened. Also, if the pressure of the pressurizing fluid decreases during vulcanization and the mold begins to open, the limit switch is turned on and the electric signal obtained at that time shuts off all of the vulcanizing internal pressure. This can prevent tire bursts. Also, if the pressure cylinder is lowered and the cam is away from the limit switch, the limit switch will turn OFF and the spacer will no longer be able to swing toward the center of the press.
This has the effect of preventing collisions with the pressurizing cylinder.

The present invention is not limited to such embodiments, but may be modified in various ways without departing from the spirit of the present invention.

[Brief explanation of drawings]

Figure i1 is a front view showing an embodiment of the safety device for a tire curing press according to the present invention, Figure 2 is a front view showing a tire curing press already proposed by the applicant, and Figure 3 is a plan view thereof. , FIG. 4 is an enlarged longitudinal sectional side view of a portion thereof. (2)...Elevating table, (5)(6)...Mold,
(II...pressure cylinder, (Lz...spacer,
(40...Cam, (41)...Hook bar, (4...
Lock mechanism, (43... rod, α furnace... spring, (4
9...Limit switch. Sub-agents: 3 patent attorneys and non-Kaimoto important literary figures

Claims (1)

[Claims] In the tire vulcanizing press, a spacer is provided between the pressurizing cylinder and the elevating table and is movable to the elevating table to transmit the pressurizing force of the pressurizing cylinder to the mold when the mold is tightened. A cam provided on the pressure cylinder, a hook bar installed upright on the lifting table, a rod that engages with the hook bar, a spring that biases the rod upward, and a spring that grips the rod during tire vulcanization. A safety device for a tire curing press, comprising a lock mechanism and a limit switch attached to the rod facing the cam.