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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2016/159793
Kind Code:
The manual, self-tightening gripper for building components, eg. concrete curbs, having a horizontal load-bearing beam (CHK-01), which is connected with the two-armed clamping claws (CHK-02, CHK-05) at both ends, and equipped with a ratchet and the latch (CHK-07), which allows for easy release of the gripped component at any time.

PYRTEK, Piotr (ul. Rogatka 1/5, Kraków, PL-31-425, PL)
Application Number:
Publication Date:
October 06, 2016
Filing Date:
March 30, 2015
Export Citation:
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TACN SP. Z O.O. (ul. Święty Marcin 29/8, Poznań, PL-61-806, PL)
International Classes:
E01C19/52; B65G7/12; B66C1/42; E04G21/16
Foreign References:
Attorney, Agent or Firm:
JĘDRZEJEWSKI, Michał (Jarzynka i Wspólnicy, ul. Słomińskiego 19 lok. 522, Warszawa, PL-00-195, PL)
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1. The manual, self-tightening gripper for building components, eg. concrete curbs, having a horizontal load-bearing beam, which is connected with the two-armed clamping claws at both ends, and the load-bearing beam, characterized in that it is equipped with a ratchet and the latch (CHK-07), which allows for easy release of the gripped component at any time.

2. The gripper according to claim 1, characterized in that it comprises engaging member (CHK-12) for connection with a crane.

Self-tightening gripper for building components

The present invention is manual, self-tightening gripper for building components used in construction work that involves lifting, transferring and placing a typical linear building component with a weight of 120kg, eg. road curbs, or other linear concrete components.

The publication number PL 212 760 Bl discloses a gripper, which has a horizontal load-bearing beam with the clamping claws pivotably attached at its both ends, which are connected with the handle- terminated lifting levers supported in the bearings in the articulated joint above the beam. The essence of the invention lies in the fact that each of the claws is a two-armed lever which acts directly on the lifted building component.

The device disclosed in the publication DE10315457 is unique in that the driving lever mechanism of the clamping claws is a four-bar linkage scissors.

Publication CA2778744A1 discloses the apparatus includes a string and a winding mechanism. The winding mechanism is configured to selectively unwind and wind the string, wherein a first portion of the apparatus is configured to be separated from a second portion of the apparatus when the string is unwound and wherein the first and second portions are configured to be adjacent to one another when the string is wound. A plurality of members are pivotally mounted to the apparatus and operably coupled to the winding mechanism, wherein the plurality of members are configured to grasp an object responsive to actuation of a button that is located within an area defined by the plurality of members.

Publication GB2105676A discloses a gripper device for use with industrial robots and comprising at least two opposable pivotted arms 1, la is provided whereby cylindrical or like objects of varying diameter, such as billets in an automatic forging line, may be located in a constant position, e.g. concentrically about a given centre. Throughout their designed operating range, movement of the arms 1, la and/or jaws 3, 3a carried thereby is controlled by the cam slot mechanisms 9, 10 and 2, 15; 9a and 8a and 2a, 15 the profiles of which are predetermined so that the centres of inscribed circles enclosed by the co- operating operative surfaces of the jaws 3,3a remain at a fixed point. When a V-shaped jaw is provided it is arranged for the bisector of the angle thereof to pass through a fixed point during movement of the arm carrying the same. This is preferably achieved by pivotally connecting the jaw to its associated arm and adjusting the angular relationship of the jaw and arm during movement of the latter. The gripper may have three fingers, each mounting a roller and may be arranged to engage either inside or outside diameters of workpieces.

Publication GB2279030A describesa lifting device, for example for lifting kerbs, comprises jaws (1, 3, 5, 7) for engaging with the kerb to be lifted, the jaws being pivotable 15 so as to be movable towards and away from the kerb to be lifted. A pair of handles (19) are provided for lifting the kerb, the handles being operably connected with the pivotable jaws for pivoting them. A releasable locking device (29, 31) releasably locks the lifting device in a position in which the jaws are engaged with the kerb. The handles are provided with resilient grips 23 at their free ends. Each handle is made up of an upper 27 and a lower 25 part which a slidably adjustable. The jaws have clamp members 11 at their ends to engage an object to be lifted.

Publication GB2335180A discloses a deyice for grasping an article, eg a pipe, comprises two pivotally attached limbs, an end of a first limb being pivotally attached to an intermediate part of the second limb at a pivot point, where a pin may be located. An abutment is arranged at the end of the first limb opposite from its pivot point, and a pair of abutments, are arranged at respective opposite ends of the second limb, with the pivot point arranged in between. The abutments abut the article when grasped, with an inner one of the abutments on the second limb generally intermediate the two other, outer abutments. On approach of the device to an article, contact with the inner abutment causes the limbs to rotate with respect to each other for closure of the device and a catch mechanism, which has cooperating elements , arranged on the limbs, bringing the outer abutments into contact with the article. A lifting point is arranged on one of the limbs for lifting the device with a grasped article, eg lifting eye connected to a rope. The outer abutments face a portion of the article directed away from the lifting point when the device is closed onto the article, so that the article can be lifted. Alternatively the device may comprise three pivotally attached limbs, with the ends of a first limb being pivotally attached to an intermediate part of each of the second and third limbs at respective pivot points.; Abutments may be arranged at respective opposite ends of each of the second and third limbs, also for abutting the article when grasped, so that the pivot points are intermediate the abutments. The abutments may be in the form of rollers, pads, trunnion wheels for allowing device to be moved along the article to a new lifting point, or serrated, elliptical wheels for jamming against the article to prevent movement.

Publication GB1308606A discloses a container supporting device for use with cranes comprises an upper spreader which is attached by slings to a crane hook (not shown), an intermediate spreader 3 rotatably attached to the spreader and a lower spreader to which a container may be attached, and there being at least one cable connecting the spreader to the crane such that in operation of the device when the spreaders and are rotated relative to spreader by means of a motor, pinion and toothed ring, the spreader remains stationary relative to the crane.

Publication US2013088027A1 discloses a vertical bore coil lifter for lifting coils of steel with reduced risk of the coil telescoping includes a pair of inside legs dimensioned to fit inside the bore of the coil with remote legs to support inner wraps of the bottom of the coil. Opposed outer legs traverse the outside of the coil and terminate in outer legs that oppose the inner legs. The outer legs supporting outer wraps of the coil and prevent telescoping of the coil while it is being lifted. The lifter may be selectively brought from an open configuration, in which the feet are drawn apart to release or receive a coil to a closed configuration in which the opposed feet are drawn together to cooperate in supporting the underside of the coil. In one embodiment an automatic latching and unlatching mechanism is provided to alternate between the release and closed configurations without need for operator intervention. Publication US2013277997A1 describesa storage battery carrier for safely installing and removing storage batteries from cramped confined spaces includes a coupler for rotatably coupling a pair of elongated members together, each elongated member having a substantially flat thin roughened clasping member affixed thereto for clasping the sides of storage batteries of varying widths. Both elongated members have one or more holes therein and the coupler includes a bolt that passes through the holes in the first and second elongated members. The holes are positioned with respect to the very thin flat clasping members so that by selectively passing the bolt through particular holes in the first and second elongated members, the clasping members will be positioned very close to the sides of batteries having a particular width enabling the carrier to safely install and remove batteries from cramped spaces. A simple single strap affixed to the elongated members actuates battery lifting.

Publication WO 0068133A1 describesan invention relates to a device for lifting and moving loads, which device comprises a frame which includes a connecting element for connecting the device to a crane or the like, two clamping elements, which can be pressed against opposed sides of a load, and at least one catching element, which can be moved with respect to the other part of the frame, by means of at least one setting cylinder to be operated by means of a pressurized fluid, between a first position, in which the catching element extends at least partially under a load clamped between the clamping elements, and a second position, in which the catching element is positioned beside the load. The device further includes a fluid pump comprising a cylinder and a piston which is movable within said cylinder. The fluid pump is mounted between the coupling element and the frame of the device, wherein the fluid pump carries out a stroke when the device is being lifted up.

Publication WO2010149847A1 discloses the lifting device comprises at least one lifting arm with a turnable lifting claw for supporting a piece to be lifted. The lifting claw is connected to the lifting arm by means of a first rotation axis which is supported to the lifting arm to be movable in the longitudinal direction of the lifting arm. Furthermore, the lifting claw comprises a second rotation axis which is supported to the lifting arm to be movable in the direction transverse to the lifting arm. When the lifting claw is withdrawn or exposed, it turns around the first and second rotation axes. At the same time with the rotation, the first rotation axis moves in the longitudinal direction of the lifting arm and the second rotation axis moves in a direction transverse to the lifting arm. At the end of the lifting arm, there is a recess, in which the lifting claw is placed. At the vertical side walls of the recess there are elongated axis slots, in which the ends of the first rotation axis are fitted. The second rotation axis is connected to the lifting arm by means of rocker levers. Advantageously, the lifting device is a coil lifter with two lifting arms.

Publication WO2014018827A1 discloses a two-piece grab arm housing for a grapple mechanism useable on a grapple attachment is described. The grab arm housing includes a lower arm housing with grab arms mounted to the lower arm housing, and an upper arm housing mounted to the lower arm housing. The upper arm housing and the lower arm housing are movable relative to one another in an x-direction and are moveable together in a y-direction perpendicular to the x-direction. In addition, the upper arm housing includes an opening through which a main beam of the grapple attachment can extend.

The gripper according to the present invention also has a horizontal load-bearing beam, which is connected with two clamping claws at both ends. The claws are connected pivotally each other by means of two arms attached at an angle and terminated with a vertical beam fastened in the composite bearing. The vertical movable component is terminated with the horizontal beam to which the handles are installed on both ends, which are designed for gripping the device both sides. The device is equipped with an additional rattle with a latch, which allows the building components to be caught permanently and released at any time. Lifting is also facilitated by the ability to use the lifting device owing to a catch combined with the horizontal supporting beam.

The invention is shown in the embodiment in the drawings, in which Figure 1 shows the device in cross-section, Figure 2 shows a side view - the longer side - in the closed position, Figure 3 shows the device in side view - the short side - in the closed position, Figure shows a longitudinal section in the closed position, Figure 5 shows a side view - the longer side - in the open position, Figure 6 shows the device in side view - the short side - in the open position, Figure 7 shows a longitudinal section - in the open position, Figure 8 shows the axonometry of the device in the open position, Figure 9 shows the axonometry of the device in the closed position. The self-tightening gripper of building components has a horizontal load-bearing beam referred to as the body (CHK-01), to which the long two-armed arms (CHK-02) are mounted at both ends - mounting is located on the arm bend (CHK-11). There are gripper feet (CHK-05) at the ends of the arms, designed for gripping the transported component owing to the clamping surfaces located on the inner side of the device, in the immediate vicinity of the transported component BL. The long arms (CHK- 02) cooperate with the short arms (CHK-03 and CHK-04) pivotally - all are connected each other by bolts. Both components are connected to the main rod (CHK-06) located in a sliding sleeve (CHK-10). Through the latch and the ratchet (CHK-07) and the sliding sleeve (CHK-10), the main rod is connected to the main device holder (CHK-09) whose ends have rubber grips (CHK-08) allowing the free transfer of the device with the building component by two workers. The gripping component can also be raised with the crane device, using the catch (CHK-12) designed for this purpose and placed on top of the horizontal component fitted with the rubber grips (CHK-08).

Lifting the curb block BL with a weight of C requires the application of a vertical force C plus the weight of the gripper to the horizontal load- bearing beam fitted with the rubber grips (CHK-08). The overall weight of the device and the force required to lift the device will be divided into two workers 34 C. These forces transmitted by the long (CHK-02) and short arms (CHK- 03 and CHK-04) onto the gripper feet cause frictional coupling on the surfaces of clamping claws with the forces of friction greater than the weight C of the building component BL.