SU1284938A1 - Device for step-by-step movement of platform - Google Patents

Abstract

The invention relates to a lifting and transport equipment. The aim of the invention is to provide control of the position of the platform. This is achieved by the fact that in a device containing a rail mounted on a platform with two rows of teeth and a lock its position, including spring-loaded pawls connected to the cylinder's brush, the teeth of the slats are made rectangular, and the lock is made in the form of a body with movably mounted it cylindrical dogs and frame connected to the cylinder rod and the longitudinal grooves of dogs. A spring-loaded stopper is installed on the latch body with the ability to interact with the OD.NOY from dogs and with the platform. 1 hp f-ly, 2 ill.

Description

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The invention relates to lifting equipment, namely, to lifts with a fixed platform mounted movement.

The purpose of the invention is to improve performance by ensuring that the position of the platform is monitored.

FIG. 1 schematically given the device, a general view; in fig. 2 shows section A-A in FIG. one.

The device comprises a frame 1, on which the platform 2 is movably fixed, a cylinder 3 of lifting and a gear rack 4 with two rows of teeth 5 and 6, located in a shah order on both sides of the rail, a protrusion 7 made on the rail 4, a clamp 8 The cylindrical pawls 10 and 11 with springs 12 and 13 and a tangent frame 14 connected to the longitudinal grooves 15 and 16 of the pawns and the cylinder 17 are movably mounted in the housing 9 of the frame 1, and a spring-loaded stopper 18 is mounted on the housing 9 of the clamp 8 (Fig. 1) with the ability to interact with one of the dogs, example with the pawl 11, having a slot 19 and the platform 20 with the abutment 2.

On the housing 9 installed limit switches 21 and 22 (Fig. 2), and on the dogs 10 and 11 are fixed flags 23 and 24.

The device works as follows.

In the extreme lower position of the platform 2, the stopper 18 under the action of the stop 20 enters the slot 19 of the dog 11, after which the cylinder shaft 17 automatically moves to the left, bringing the dog 10 out of engagement with the tooth of the rail 4. The dog 11 when the spring 13 interacts and the stopper 18 remains in the same position After that, the platform 2 by the lift cylinder 3 moves infinitely to the upper extreme position in which the protrusion 7 of the rail 4 acts on the pawl 11, which moves to the right (FIG. 2) due to the longitudinal groove 16 in the pawl and releases the spring-loaded stopper 18, which exits sockets 19, transfer device in the mode of step motion.

If it is necessary to move the platform 2 to the tooth of the lath 4, the cylinder 17 moves the traction frame 14 to one side (in this case, to the left), thereby compressing the spring 12, which impacts the pawl 10, disengages it from the lath 4.

The flag 23 departs from the end switch 21, indicating that the platform 2 can be moved by the cylinder 3 of the lift.

At the same time, the tread frame 14 (when moving to the left) allows the dog 11 to rest against the row of teeth 5 of the safety rail 4 under the action of the spring 13 (Fig. 2).

When moving, the platform 2 moves the safety rail 4, along the number of teeth 5

which the doggie 11 slides before falling into the nearest cavity between the teeth. At the same time, the pawl 11, moving to the left, by means of the flag 24 turns on the limit switch 22, which turns off the lift cylinder 3.

If necessary, the next movement of the platform 2, the cylinder 17 moves to the right the traction frame 14, which through the longitudinal groove 16 leads 5 rails 4 to the pawl P. from the depression of the p. between the teeth 6 of the rail 4, turns on the switch 21, which turns off the cylinder 3 lift a.

The use of the proposed device in comparison with the known one allows to ensure permanent insurance and control of the position of the platform of the elevator by making the safety rail teeth rectangular and making the lock in the form of a body with cylindrical pawns mounted movably in it and a traction frame connected to the cylinder shaft and longitudinal dog grooves.

Ensuring the continuous progress of the rail is achieved due to the presence of a stopper,

mounted on the case of the latch with the possibility of interaction of one of the dogs and the platform stop.

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Claims (2)

1. A device for stepping the platform, comprising a frame, a platform movably mounted on the frame and connected with it, a lifting drive in the form of a cylinder, a platform position lock comprising a gear rack mounted on the platform with two rows of teeth arranged in a staggered order on both sides of the rail, a frame mounted on the frame that can be moved in the horizontal plane and equipped with spring-loaded dogs, the drive horizontal movement of the frame relative to the frame, made in the form of a two-way power cylinder, 0 characterized in that, in order to improve performance by ensuring the monitoring of the position of the platform, it is equipped with limit switches for controlling the rammer of the platform lift motor mounted on the frame 5 and stops for engagement with limit switches mounted on dogs that are cylindrical, and the rack teeth are made rectangular. 2. The device according to claim 1, characterized in that, in order to ensure a continuous movement of the platform, it is provided with a spring-loaded stopper placed on the frame, and in one of the dogs a hole is made for interacting with the stopper. 77