RU1785989C - Load gripper - Google Patents

Abstract

Use: the device is designed to lift piece loads. SUMMARY OF THE INVENTION: the load gripping device comprises a drive frame, two-arm levers pivotally mounted thereon, a yoke connected to the lifting mechanism, hinged rods associated with the two-arm levers and the yoke, a non-contact sensor for lowering the yoke relative to the frame, the control element of which is connected with one of the hinged rods, and the output is included in the electrical control circuit of the frame movement drive. 1 s.p. piano, 5 ill.

Description

The invention relates to hoisting and transport machinery, in particular to load gripping devices, and can be used in overhead monorail transport systems in various industries.

A lifting device is known, comprising a running trolley equipped with a load lifting drive and a pivot-lever mechanism, the upper end of which is fixed to the frame of the truck, and a beam connected to the load lifting drive by means of a flexible link mounted on the lower end of the articulated lever a mechanism for securing the position of the traverse, made of at least two bushings with blind holes, interconnected by a transverse beam with holes for passing a flexible rod. At the same time, stepped holes are made on the traverse with the possibility of centering them with blind holes of the clamp bushings and stationary catchers for the traverse and clamp, which are equipped with a lifting device and which are located under it at workplaces.

However, the operation of the known device is difficult, since when the center of gravity of the beam is displaced with the load, the alignment of the holes of the bushings and catchers may be disturbed.

A load-gripping device is known, comprising a drive frame, two-arm levers pivotally mounted on it, a traverse connected to the lifting mechanism, articulated rods, some ends of which are fixed on one shoulders of the two-shouldered levers, and the other on the traverse, and a mechanism for fixing the position of two-shoulders levers, including a slider fixed to the traverse and a vertical guide for it fixed on the frame.

A disadvantage of the known load gripping device is the possibility of reducing the accuracy of gripping the load and positioning it in the workplace.

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An object of the invention is to improve performance.

The goal is achieved in that the pick-up device containing the drive frame, articulated 5 and two-arm levers, a traverse associated with the lifting mechanism, articulated weights, some ends of which are fixed on the rear shoulders of the two-shouldered levers, and the others - and the traverse, and the mechanism fixing position 10 and two shoulders levers, including a slider fixed to the traverse, and a vertical guide fixed thereto on the frame, according to the invention, it is equipped with a contactless sensor for lowering the grass position mounted on the frame 15 sy relative thereto, the control element is associated with one of the hinge rods and included in the output electrical drive control circuit pereme- scheni frame 20 to be raised at the last of the disclosed two-armed levers.

In this case, the proximity sensor contains a light flux source, a light detector, and its control element is a flag fixed to the first end of one of the hinged rods with the possibility of blocking the light flux of the source.30

Figure 1 shows the load gripping device, a General view; Figures 2-4 are a kinematic diagram of a device in various stages of cargo capture; in Fig.5 is a view A in Fig.Z.35

The load gripping device comprises a drive frame 1, on which two-arm levers 2 are pivotally fixed, one ends of which have hooks 3, and the other ends are pivotally connected to the rods 4, which 40 are pivotally connected to the slider 5, mounted on the yoke 6, which flexible towers 7 are coupled to a hoist drive (not shown). The slider 5 is mounted with the possibility of movement 45 along the guide 8, mounted on the frame 1. On the guide 8, an asterisk 9 is installed, and on the slider 5 - a dog 10. On one of the t 4 is installed a control element in the form of a flag 11, which has the possibility of interaction with a proximity sensor 12, including a light source 13 and a light detector 14, which are connected to the electrical circuit of the drive mechanism for lifting the frame 1 with a load of 15.55

In the initial position, the load gripping device is tightened to the vehicle (not shown), the hooks 3 are pulled apart, since the other ends of the levers 2 abut against the rotary sprocket 9 from the bottom (Fig. 2). When lowering the load gripping device, the frame 1 is mounted on the load 15, the slider 5 with the towers 4 continues to lower under the action of gravity, and the hooks 3 are further opened (Fig. 3). In this case, the sprocket 9 rotates 90 ° under the action of the dog 10, providing the other end of the lever 2 to move freely upward. At this point checkbox

11, interact with the sensor 12, at the signal of which at the moment of blocking the light flux from the source 13 to the light receiver 14, the drive control system switches the drive to rise. Sensor triggering

12 occurs only when the hooks 3 are fully opened, and the actuation moment (Fig. 3) is synchronized with the switching of the sprocket 9 by the corresponding setting of the flag 11 when assembling the load gripping device. When the flexible rods 7 move upward, the slider 5 with the rods 4 first goes up, turning the levers 2 relative to the frame 1. At the same time, the ends of the levers associated with the rods 4 do not encounter obstacles pass by an asterisk 9 (Fig. 4 ) and hooks 3 capture load 15, entering under the bottom of the container. Then the frame 1 is detached from the load 15, which is placed on the hooks 3, and the load 15 is lifted. When lowering, the load 15 is set to the working position, the frame 1 is placed on the load 15, the slider 5 with the rods 4 continues to lower under the action of gravity. hooks 3 consumption tf, while the dog 10, lowering the bend, rotates the sprocket 9 by 90 °. At this moment, the flag 11 interacts with the sensor 12, at the signal of which the control system switches the drive to lift (Fig. 3). The slider 5 with the rods 4 goes up, turning the levers 2, the ends of which abut against the sprocket 9. The hooks 3 remain open and the frame 1 leaves the load without hindrance, leaving it in the working position (Fig. 2).

Claims (2)

The proposed technical solution allows to improve the operational characteristics of the lifting device. SUMMARY OF THE INVENTION 1. A load gripping device comprising a drive frame, two-arm levers pivotally attached thereto, a yoke connected to a lifting mechanism, hinged rods, one ends of which are fixed on one shoulders of the two-arm levers, and the other on the yoke, and a position fixing mechanism two-arm levers, including a slider fixed to the traverse and a vertical guide fixed to the frame, characterized in that, in order to improve operational characteristics, it is equipped with an endless Comp act tow lower crosshead position relative thereto, the control element is associated with one of the hinge rods, and the output is switched into the electrical circuit controlling the drive movement of the frame to be lifted at last the disclosed two-armed levers. 2. The device according to claim 1, with the proviso that the proximity sensor contains a light source, a light receiver, and its control element is a flag fixed to the first end of one of the hinged g with the possibility of blocking the light flux of the source. /: / Editor S. Kulakova  & g. At Compiled by V. Zabrodsky Tehred M. Morgenthal Proofreader I. Shulla