SU1402479A1 - Hand truck - Google Patents

Abstract

The invention relates to transport, in particular to hand trucks. The purpose of the invention is to expand the operational capabilities and simplify the design. The hand truck contains a frame, a cargo area, a lift, and a brake. The cart is provided with a clamping device, made in the form of flat jaws, pivotally connected with rigidly fixed relative to the frame with the possibility of fixation relative to the latter. The lift is made in the form of fixed and moving frames entering each other. On the movable frame there is a bracket with rollers and a cargo platform installed at regular intervals. On a fixed frame there is a disk with a plate that has a truncated cone shape in the plane passing through the axis of rotation of the disk, and the shape of an Archimedes spiral in the plane perpendicular to the axis of rotation of the disk. The forming roller is in contact with the outer surface of the helix, which can be displaced relative to the roller. The lift is made with the possibility of removal from the frame. The brakes are made in the form of handles, kinematically connected by pivoting forks with pivoting wheels. Rotary forks and wheels are located on the same axis. 4il. d (L

Description

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ABOUT

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FIELD OF THE INVENTION The invention relates to transport, in particular to hand carts.

The purpose of the invention is to enhance the operational capabilities and simplify the design.

Figure 1 shows schematically the proposed hand truck, view. from the side; FIG. 2 is a view A of FIG. 1; on fig.Z - view In figure 1; figure 4 - the principle of operation of the lifting mechanism; figure 5 is a section bb In figure 4.

The trolley consists of a frame 1 fitted with two front 2 and two rear 3 steering wheels, the wheels 3 being made swiveling to facilitate shunting operations. A fixed frame 5 is fixed on the side bearing supports 4 of the frame 1, in which the movable frame 6 moves in the vertical direction. On the latter there is a bar 7 with rollers 8 and a cargo platform 9 arranged on it with fixed pitch. On the fixed frame 5 . a disk 10 with a spiral plate 11, having in the plane passing through the axis of rotation of the disk 10, the shape of a truncated cone, the smaller base facing the disk 10, and the larger - to the rollers 8. In the plane perpendicular to the axis of rotation of the disk, the plate 1 has the shape of an Archimedes spiral. The disk 10 is made relative to the axes of the rollers 8 with an angle of inclination different from 90, which ensures the engagement of the rollers with the spiral plate 11 and rolling of the rollers on the outer surface of the spiral. The angle of the disk 10 is chosen such that. that in its upper part the portion of the spiral plate II is located parallel to the axis of the rollers 8. The disk 10 is provided with a handle 12 connected to the disk at a right angle. The implementation of the spiral plate 11 in the form of an Archimedes spiral at an angle greater than 90 relative to the disk plane, the disk tilted to the axis of the rollers also at an angle greater than 90 °, and the axis of rotation of the disk perpendicular to its plane ensures constant engagement of the rollers 8 with the spiral plate 11. The distance between the upper

section of a spiral turn - a shelf and

the end of the coil is chosen with a somewhat larger diameter of the roller in order to ensure that it is coiled. Frames 5 and 6, bar 7, rollers 8, disc 10

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with a spiral 11 and a handle 12 form a lift. Clamping device for transportation of large sheet; This material consists of jaws 13, connected by hinged plates 14 with posts 15 rigidly mounted on supports 4 and provided with handles 16. In the upper part of stands 15 are made along the radius of the hole 17. A hole 18 is made in the hinged plate 14. The brakes are made on the principle of asynchronous the drive wheels turn and consist of turnable brake wheels 3, kinematically connected with rotary forks 19 b. handles 20, with swivel forks 19 and driving wheels 3 located on the same axis. The wheels 3 are fastened with a folding lever 21 to ensure the synchronous movement of the wheels in the process of moving the cart.

The hand truck operates as follows.

When bulk cargoes (for example, metal blanks) are transported, the trolley is moved to the location of the cargo and, by rotating the handle 12 and disk 10, the load platform 9 is lifted to the level of the cargo (for example, one of the shelves of the shelves with blanks). When the knob 12 is rotated clockwise, the coil 11 rolls around the rollers 8. At the same time, there is one roller in constant contact with the coil, which is located on the upper portion of the coil, the shelf. This provides a constant capture of the rollers 8 by the coil 11 and the movement of the moving frame 6 relative to the fixed 5, the lower portion of the disk 10 does not touch the rollers 8 when it is moved. One turn of the disk 10 corresponds to the vertical movement of the load platform 9 to a distance equal to the pitch of the rollers 8 placed on the cargo platform 9.

In the loading mode, the folding lever 21 is disconnected from one of the wheels x 3 of the wheels, the handles 20 are turned so that the wheels 3 turn one towards the other at a certain angle, and the trolley is braked. After loading, 3 is fastened with a folding lever 21, with help, and the handles 20 are aligned parallel to each other and the direction of movement and the cart are moved to the place of unloading of the cargo. The truck is braked, the load is moved to the height required for unloading and unloading. In the mode of transportation of large-sized panel-sheet material, the lift is disconnected from the trolley, for which the bolts connecting the fixed frame 5 with the side carrier supports 4 are removed. The transported sheet material is placed between the jaws 13 of the pressure device, the knobs 16 move the jaws 13 to a reliable securing the sheet weight, fix the position of the jaws 13 with the help of clamps (not shown) fixing the coincidence of one of the holes 17 with the hole 18. When unloading, all operations are performed in the reverse order.

Claims (1)

Invention Formula A hand truck containing a frame, a loading area, a lift, a brake, characterized in that, in order to expand its operational capabilities, the cart is equipped with a clamping device made in the form of flat jaws hingedly fixed to the frame with fixed supports relative to the latter, and the elevator is designed as fixed and moving frames entering each other, with a slider with rollers and a cargo platform installed at regular intervals between the movable frame and not the movable plate houses a disk with a plate that has a truncated cone shape in the plane passing through the Erasheni axis, and the Archimedes spiral shape in the perpendicular axis of rotation of the disk and the forming roller is in contact with the outer surface of the helix, which is movable relative to roller, while the lift is made with the possibility of removal from the frame, and the brakes are made in the form of handles, kinematically connected rotatable forks with swivel wheels, and rotatable forks and wheels are arranged on the same axis. Suffs (rig. 3 ff GO