SU1208010A1 - Hoist safety device - Google Patents

Description

The invention relates to lifting and transport equipment, namely, to lifts of carriages, used in tire production for mechanized loading of tires for tires.

The aim of the invention is to increase reliability.

Figure 1 presents the lift, a general view; figure 2 - node I in figure 1; on fig.Z - the same, when switching the cylinder; figure 4 - section aa in figure 1.

The elevator includes a platform 1 movably mounted on the rollers 2 in the vertical frame 3 of the elevator. Platform 1 is associated with a power cylinder 4 lifting it. Platform 1 is secured with a toothed rack 5, mounted in guides 6. Clamps of the safety rail have hinged on the frame 3 the main and additional doggie 7 and 8, which alternately form the engagement of the teeth 9 and 10 of the rail 5, and the cylinder. 11. In this case, the teeth are 10. staggered in order with the teeth 9, the pawl 7 is connected to the rod 12 of the cylinder 11 by means of pivotally connected links 13 and 14, and the pawl 8 is connected to the rod 12 of the cylinder 11 by pivotally connected links 15 and 16 and t gi 17 with a support roller 18. On links 14 and 16, stops 19 and 20 are fixed to interact with the ends of the links 13 and 15, respectively. Dogs 7 and 8 are connected by a spring 21. For operation of the device, the rod 22 and rodless 23 of the cylinder cavity 11 are used.

For loading the blanks 24 into the carts 25, the conveyor 26 serves, the movable part of which is mounted on the carriage 27 mounted on the base. Drives of the carriage 27 and the conveyor belt 26 are not shown. The extreme position of the carriage 27 is fixed when the switch 28 is pressed.

The device works as follows.

After installation and fastening; On the platform 1 of the trolley 25, Pressing the switch 28, a signal is given to raise the platform 1 on the rocks 2 in the frame 3 by the power cylinder 4. At the same time, the rail 5 rises

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five

moving in the guides 6. At the same time, the dogs 7 and 8 slip along the teeth of m 9 and 10, pressing them under the action of the spring 21 and swinging about their axes. Link 13 and 14, 15 and 16 are folded and unfolded, alternately in identical positions. The rod 12 of the cylinder 11 remains stationary.

In the upper position of the platform, the pressure in the tsn-hindra 4 is weakened by any known method so that under the action of the weight of the platform with a tee 5 leveling, the rod begins to reverse, resulting in that the rail 5 abuts, for example, with the lower one. teeth 10 in additional dog-, i ku 8 (stem of 12-cylinder 11 is retracted; FIG, 2J.

In such a position of the device, the bottom shelf of the dolly 25 is in the loading position, the other shelves are raised. Blanks

24 are fed to the conveyor 6, for example in the direction of arrow B JHa of FIG. 4, and then placed on the shelf of the cart-shelf 25 when the movable part of the conveyor 26 is mounted on the carriage 27. After loading the first shelf, the second shelf is placed in a horizontal position and the platform 1 with the cart -storeykoy

25 is started up to the loading level of the second shelf, which is possible after the carriage 27 is pressed by the switch 28.

 In order to lower the platform 1 to the next stage, the working medium is fed into the rodless cavity 23 of the cylinder 11. In this case, the rod 12 is pushed to the left and by means of a pulley 17 with roller 17

18 turns the link 16 until the stop 20 reaches the end of the link 15, forming a rigid connection with the rod 12, turning the pawl 8 to the left until the lath 5. unlocks. At the same time with the spring 21 the pawl 7 presses

to the rail 5, and when the next tooth 9 approaches, the rail 5 is fixed again. The next lowering of platform 1 takes place when the working medium is supplied to the rod end 22 of cylinder II. The rod 12 extends to the right, turns the link 14, while the stop

19 does not reach the end of the link 13, and then the dog 7 turns

5 until the lath 5 is released. At the same time, the dog 8 is clamped with the spring 21 to the lath 5, and when the adjacent tooth 10 approaches, the lath is fixed.

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FIG. 2

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Claims (1)

LIFT SAFETY DEVICE, comprising a safety gear fixed to the platform of the elevator, a main dog pivotally mounted on its base, connected to one end of the elastic element and connected to the rod of the power cylinder mounted on the base of the articulated double link, on one | the link of which is emphasized for interaction with another link, about the same. which, in order to increase reliability, the safety gear rack is equipped with a number of additional teeth displaced relative to its main teeth along it, and it is equipped with an additional dog pivotally mounted on the base and connected with the specified rod by an additional two link, on one link of which the emphasis is made to limit the movement of another link, while the other end of the elastic element is attached to the additional dog.