CZ304007B6 - Mechanical arm for taking out test cores - Google Patents

Abstract

The mechanical arm for taking out test cores according to the present invention consists of a gripping head (1) with individual clamping segments (5), a tube (2) and a transmission mechanism (4). Said gripping head (1) of the mechanical arm consists of a head of cylindrical cross section. At least two holes with guide elements inserted therein are drilled onto the head circumference. External portions of the clamping segments (5) are attached to the guide elements. The tube (2) can be provided with one or two ergonomically shaped handles (6), which enable easy handling with the device. On the opposite side of the tube (2), relative to the gripping head (1) with the clamping segments (5), there is located an actuator of force necessary for clamping a test core by means of the gripping head (1) with the clamping segments (5). The clamping of the test core by the clamping segments (5) is executed by means of a transmission mechanism (4), situated inside the tube (2). The transmission mechanism (4) enables a continuous motion of all the clamping segments as well as a continuous growth of force for clamping the test core.

Description

Mechanical hand for removing core bores

Technical field

The invention relates to the field of construction and engineering. The mechanical arm of the invention is useful for removing samples from the structure. The mechanical hand is designed for handling and recovering core bores from blind and deep bores. The equipment can be used for common sampling of concrete, reinforced concrete, wire-reinforced concrete, fiber-concrete or masonry structures. Another use is to remove incoherent borehole parts or borehole parts from a greater depth.

BACKGROUND OF THE INVENTION

Core bores are used to verify the compressive strength, the course of cracks in the structure, or to verify the depth of carbonation of concrete. It is carried out using core drilling rigs of different diameters. The drilling of the boreholes is carried out today by means of a chisel, which is pushed into the pierced perimeter of the boreholes. After the core bores have been broken, the boreholes are in practice removed by picking the sample by the edge of the chisel or one or two flat wires. Such sample removal is often very problematic. Other inconveniences arise in the case of samples taken from reinforced concrete, wire-reinforced concrete, fiber-concrete constructions, where the worker usually cannot do without drilling the sample from the face, inserting the dowel and screwing in the lifting rod. Drilling the sample, however, necessarily increases the length of the boreholes and thus also increases the extent of interference with the structure under consideration.

When using a mechanical hand, it is sufficient to insert the blades into the cut and grip the head with a slight turning of the head. The mechanical arm was tested for real core drilling. During the sampling, a sample was pulled out, which was connected to the original structure with reinforcing steel (diameter 12 mm) in the length of the anchorage of the rod about 40 mm, under the drilling of the core bores. This device will play an important role especially in the diagnosis of reinforced concrete surfaces, where the bore remains trapped on the wires at the bottom surface of the sample.

SUMMARY OF THE INVENTION

These drawbacks are largely eliminated by the mechanical hand for removing the core bores. The mechanical hand for removing the core bores is assembled with a gripping head with individual clamping segments, the gear mechanism tube. The gripping head of the mechanical hand is formed by a cylinder head. At least two holes are drilled along the perimeter of this head, in which the guide elements are inserted. Clamping segments are attached externally to the guide elements. The tube can be equipped with one or two ergonomically shaped handles for easy handling. The tube provides effective protection of the gear mechanism against damage and dust. The tube length allows trouble-free sample removal and increased depths, for example when taking samples from roadway strata. On the opposite side of the tube from the gripping head with the gripping segments, there is a force actuator necessary to clamp the sample with the gripping head with the gripping segments.

The clamping of the sample by the clamping segments is accomplished by a transmission mechanism that allows the smooth movement of all the clamping segments and a continuous increase in the force to clamp the core sample. The length of the clamping segments allows the core of the bores to be gripped even in the event of damage. A tube is attached to the gripping head by means of a bayonet, inside which a gear mechanism is located. The transmission and regulation of the force exerted on the clamping segments is transmitted by means of a threaded rod and cable glands with a central nut. It is located on the bottom of the threaded rod. The return of the clamping segments is resolved by means of resilient members located in the guide segments of the gripping head of the mechanical hand. The force on the threaded rod is exerted by turning the head. The transmission and control of the force exerted on the clamping segments can also be transmitted by a hydraulic piston which replaces the original threaded rod. This piston is located in the tube and gripping head of the mechanical hand:

For the purposes of this application, a transmission mechanism is, for example, a mechanical, rope, hydraulic, or a combination thereof.

For example, the resilient member may be a spring for the purposes of this application.

Overview of the figure in the drawing

Fig. 1 shows a mechanical hand for removing core bores according to the invention in an embodiment with a transmission realized by means of a threaded rod.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The mechanical hand is made up of a gripping head 1 with individual clamping segments 5, a tube 2 and a gear mechanism 4. The gripping head 1 of the mechanical hand is formed by a head of cylindrical cross section. At least two holes are drilled along the perimeter of the head, in which the guide elements are inserted. The clamping segments 5 are attached externally to the guide elements. The tube 2 may be provided with one or two ergonomically shaped handles 6 which allow easy handling of the device. Tube 2 provides effective protection of the transmission mechanism 4 from damage and dust. On the opposite side of the tube 2 to the gripping head 1 with the gripping segments 5, there is a force actuator necessary to clamp the sample by gripping head I with the gripping segments 5.

The gripping of the sample by the gripping segments 5 is effected by a transmission mechanism 4, which allows a smooth movement of all gripping segments 5 and thus a continuous increase in the force to grip the core sample. The length of the clamping segments 5 allows the core of the bores to be gripped even in the event of damage. A tube 2 is mounted on the gripping head 1 by means of a bayonet, inside which the gear mechanism 4 is located. The return movement of the clamping segments 5 is provided by resilient members 3 located in the guide segments of the gripping head 1 of the mechanical hand. The force on the threaded rod 7 is exerted by turning the force actuator.

Example 2

The exemplary embodiment of the invention according to Example 2 differs from the exemplary embodiment of Example 1 in that the movement of the clamping segments 5 is realized by means of a cable transmission which is at the point of transition from the tube 2 to the gripping head | completed with pulleys. The pulleys thus reduce the resistance of the rope gears to the body of the mechanical hand. The return of the clamping segments 5 is solved by mounting the resilient members 3 on the bodies of the clamping segments 5.

-2GB 304007 B6

Example 3

The exemplary embodiment of the invention according to example 3 differs from the previous exemplary embodiments 1 and 2 in that the force transmission of the clamping segments 5 is realized by means of a hydraulic piston located in the tube 2 and the gripping head I of the mechanical hand.

Industrial applicability

A mechanical hand for removing core boreholes seems to be a suitable complement to the core drilling rig equipment, especially for sampling. The device greatly facilitates the actual collection and increases the sampling comfort when removing samples eg under the water surface, from a great depth or wedged bores.

Claims (5)

PATENT CLAIMS Mechanical hand for removing core bores, characterized in that it consists of a gripping head (1) of cylindrical cross-section with individual gripping segments (5), a tube (2) and a gear mechanism (4), wherein the gripping head (1) ) of the cylindrical cross section are drilled at least two holes, in which the guide elements are inserted, on which the clamping segments (5) are attached externally, a tube (2) is attached to the gripping head (1), inside which the gear mechanism (4) ), through which a force transmission is realized and which consists of a threaded rod (7) and a cable transmission with a central nut (8), the number of ropes being equal to the number of clamping segments, the central nut (8) being arranged to perform a sliding movement the threaded rod (7) and the cable transmission ropes are fastened, in the gripping head (1) of the mechanical hand are resilient members (3) in such a way that they are arranged to force against the clamping force exerted by the transmission mechanism (4), to push the clamping segments (5) to a position distant from the gripping head (1), each of the spring members (3) belonging to one clamping segment (5), and a clamping force actuator is located on the side of the tube (2) than the gripping head (1) with the clamping segments (5). Mechanical hand for removing core bores, characterized in that it consists of a gripping head (1) of cylindrical cross section with individual gripping segments (5), a tube (2) and a gear mechanism (4), wherein the gripping head (1) of cylindrical cross-section, at least two holes are drilled in which the guide elements are inserted, on which clamping segments (5) are attached from outside, a tube (2) is attached to the gripping head (1), inside which the gear mechanism (4) ), through which the transmission of force is realized and which consists of a hydraulic piston connected to the rope transmission, when the number of ropes is equal to the number of clamping segments, in the grip head (1) of the mechanical hand are elastic members (3) such that they are arranged to force against the clamping force exerted by the transmission mechanism (4), to push the clamping segments (5) to a position distant from gripping heads (1), each of the resilient members (3) belonging to one gripping segment (5), and a gripping force actuator is located on the opposite side of the tube (2) to the gripping head (1) with gripping segments (5). Mechanical core bore removal hand according to claim 1 or 2, characterized in that the tube (2) is provided with one or two ergonomically shaped handles (6). -3GB 304007 B6 A mechanical hand for removing core bores according to the preceding claims, characterized in that there is a bayonet connection between the tube (2) and the gripping head (1). A mechanical hand for removing core bores according to the preceding claims, characterized in that the entire device is operable by an electric drive.