DE1279299B - Hydraulic climbing hoist - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

IntCl .:

B66f

German class: 35 d- 2/05

Number: 1279 299

File number: P 12 79 299.3-22 (W 41103)

Filing date: March 10, 1966

Open date: October 3, 1968

The present invention relates to a hydraulic climbing hoist for gradually conveying a load along a support, in which the cylinder or the piston each have a gripper head with a set of inner grippers is connected, with wedge surfaces inclined to the column axis within a conical Surface of the gripper head and have a toothed surface parallel to the support axis.

Such climbing hoists are known, the gripper sector or trapezoidal cross-section on- * ° have and counteract by compression springs arranged in the circumferential direction between adjacent grippers the conical surface of the gripper head can be created. The manufacture of such grippers with trapezoidal or sector-shaped cross-section is cumbersome * 5 and expensive. The grippers are held loosely in the gripper head and fall apart on expansion from it, d. i.e., the replacement of worn grippers is awkward.

The invention is based on the object of a hydraulic climbing hoist with respect to manufacture and handling simpler gripper sets. The climbing hoist according to the invention is thereby characterized in that each set of grippers in a known manner in a one-piece annular Cage is arranged, the radially continuous grooves with substantially plane-parallel Has side surfaces in which the gripper having plane-parallel side surfaces is attached to the cage Attacking securing means with the toothed surface parallel to the column axis to a limited extent are kept movable. The grippers with substantially plane-parallel side surfaces can be made from suitable flat material can be produced relatively easily. Those in the cage to a limited extent movably held grippers can be easily removed and installed together with the cage, i.e. replacing worn sets of grippers is very easy.

Hydraulic climbing hoists with grippers made of flat material are also known. These grabs are not held secured in a cage, but are loosely inserted into the gripper head, whereby it is not possible to simply replace entire sets of grippers. By having the range of motion of the loose The gripper used is not clearly limited, these grippers can move when the hoist is set up move freely inwards on a support and the insertion of the support into the bore of the hoist considerably make more difficult.

A hydraulic lifting mechanism is also known in which the grippers designed as balls are in Hydraulic climbing hoist

Applicant:

Tool factory Selzach A. G., Selzach (Switzerland)

Representative:

Dipl.-Ing. R. H. Bahr, Dipl.-Phys. E. Betzier and Dipl.-Ing. W. Herrmann-Trentepohl, patent attorneys, 4690 Herne, Freiligrathstr. 19th

Named as inventor:

Alfred Reinmann, Niederbipp (Switzerland)

Claimed priority:

Switzerland of April 28, 1965 (5868). - -

an annular cage are loosely inserted. Apart from the fact that balls only have limited clamping forces able to generate, the simple interchangeability of entire gripper sets is missing here too, since the Balls are not secured against falling out of the cage.

Several embodiments of the invention are shown in the drawing. It shows F i g. 1 a complete climbing hoist,

F i g. 2 the cylinder and the piston of a double-acting climbing hoist in axial section,

F i g. 3 a two-way remote controllable gripper head,

F i g. 4 a remote controllable one-way acting gripper head,

F i g. 5 a gripper replacement in section,

6 shows the set of grippers according to FIG. 5 in a top view, and

F i g. 7 to 10 two further variants of the gripper set.

The climbing hoist according to FIG. 1 is used to lift a load, for example a platform, a Sliding formwork or the like along a support 1. The lifting mechanism has a cylinder 2, which over 'the Nozzle 3 can be supplied with a pressure medium. A piston 4 is slidably arranged in the cylinder 2, which with a tubular piston rod 5 fixed is connected or consists of one piece. With the lower end of the tubular piston rod 5 is a sleeve 6 is screwed, the flange of which in turn is screwed to a jacket 7. The coat 7 has at its upper end an annular, one

809 619/93

compared to the lower, the load-bearing gripper head 18 moved upwards. Is now pressure means inserted into the cylinder 2, the piston 4

Eüde of the cylinder provided with which the housing of the gripper head 11 can be screwed. The in F i g. 2 piston rod 5, which is not completely shown, is connected at the lower end to the same parts as in FIG. 1. The Kolben4α is not arranged in the double acting lifting gear at the end of the piston rod, and there are provided on both sides of the piston and α at both ends of the cylinder 2 sealing rings. At both ends of the cylinder connecting pieces 3 α and 3 b are provided, through which pressure medium can optionally be introduced into the upper or lower space of the cylinder. The climbing hoist according to FIG. 2 (with gripper heads U and 18 according to FIG. 1) works as follows: The illustrated lower end position of the piston 4 α corresponds to the working position according to FIG. 1, where the piston 4 is also in its lower end position. The cylinder 2 α with the upper gripper head 11 is shifted upwards, and the load is from the lower

so gripper head 18 worn. Pressure medium is now introduced through the lower nozzle 3 α, whereby the piston 4 α and the parts connected therewith are raised. As already explained, the upper gripper head is clamped to the support 1, and

adjustable stop, the one with a likewise annular stop 9 screwed to the lower end of the cylinder 2 cooperates. Between the stop 9 of the cylinder 2 and the flange of the sleeve 6 a strong compression spring is used.

With the upper end of the cylinder 2, an upper gripper head 11 is screwed, which several Has gripper 35 with an inclined wedge surface 12 rest against a conical surface 13 of the housing of the gripper head. The structure of the gripper set will be described later. A compression spring 16, which is supported on a ring 17, holds the gripper 35 in Contact with the conical surface 12.

A corresponding gripper head 18 is with the lower end of the shell 7 and thus over the Sleeve 6 is connected to the lower end of the piston rod 5. Corresponding parts of the gripper head 18 are designated the same as the parts of the upper gripper head 11 and therefore do not require any further explanation. A ring 19 of the lower gripper head 18 is used to support the load.

The climbing hoist according to FIG. 1 works as follows:
In the operating state shown, the cylinder 2 is held in the upper end position by the spring 10, which is determined by the stop of the ring 9 on the ring 8 as the lower gripper head with the one engaging it. The upper gripper head 11 load is being tightened. After completion of this load stroke, pressure medium is now introduced through the upper connection 3 b , whereby the cylinder 2 a with the upper gripper head 11 is raised in the idle stroke. One

raised in relation to cylinder 2. At the beginning 30 spring 10 as in the lifting mechanism according to FIG. 1 is included this stroke, the upper gripper head 11 is not required on the.

Support 1 clamped, with the load connected via the Is the load connected to the upper gripper head,

lower gripper head, the piston rod 5, the sleeve 6 so carries in the starting position shown in Fig. 2 and the jacket 7 is tightened. Has the KoI- the cylinder 2 α the upper gripper head the load. If ben 4 its upper end position is reached, the pressure 35 pressure medium is now lifted through the lower nozzle 3 a einim cylinder and a backflow of the guided, so the lower pressure fluid is made possible by the piston 4 α, so that now the gripper head in the idle stroke followed. If the load is then taken over again from the lower gripper head 18, pressure medium is fed through the upper nozzle 3 b , * while the spring 10 pushes the cylinder 2 with the upper gripper head 11 compared to the lower upper gripper head until the 40 gripper head raised, and now the lower gripper ring 9 strikes against the ring 8 again. By . head clamped to the support 1 and the upper

The gripper head with the load can be lifted by the hydraulic pressure.

If a climbing hoist is required, which is in

Impact ring 8 as well as the other parts of the lifting mechanism, 45 is movable in both directions and generates forces, namely the cylinder 2 and the spring 10, so the double-acting drive unit is proportionally easily accessible. On the other hand, these FIG. 2 with gripper heads according to FIGS. 3 and 4 are seen through the continuous, tubular piston. These gripper heads in turn have matching rod 5 and the parts firmly connected to it 6 internal and external threads, with which they are completely separated from the interior with and 7, so that 5 ° the cylinder 2 α or with the lower internal thread impossible moisture or contamination can be connected by the jacket 7,
the support 1 can penetrate into the lifting mechanism. The upper gripping head 20 of FIG. 3 has a

Pas climbing hoist according to Fig. 1 can only be in a cylindrical housing 20 α , which can be moved as a direction and generate forces at the same time. The outer jacket of a hydraulic cylinder from load must be formed with the lower gripper 55.-A head is connected to the housing jacket 20 α, since it is only drawn, not the inner cylindrical jacket 21 by a ring 22

Jtest = bound together. Through the bore of a connecting piece 23 and the ring 22, pressure medium can be introduced into the lower and upper cylinder chamber both above and below the ring 22, in each of which a piston 24 or 25 with a conical contact surface 26 is arranged. In the ends of the gripper head 20, gripper sets are inserted in opposite directions, the structure of which is shown in FIGS. 5 and 6 show in more detail, so that the load is placed with the lower 65 at will.
or the upper gripper head. Each gripping replacement has a cage 27 with a

The double-acting lifting mechanism according to FIG. 2 has a through hole 28, the clear diameter of which corresponding external thread on the upper knife the diameter of the support 1 slightly over

Appropriate setting of the stop ring 8 can increase the lifting height per working cycle of the climbing hoist can be set. Both this adjustable

but can be pushed up because of the cylinder with the upper gripper head 11 always τκίΒΓ is pushed upward by the spring 10 in the idle stroke.

However, it is easily possible by installing a double-acting cylinder according to FIG Place of the single-acting cylinder according to FIG. 1 pulling and pushing forces of any magnitude

5 6

increases. The cage has a cone-shaped medium supply to the upper gripper head 20 interrupted upper part 29 and a cylindrical lower part, so that this gripper head with respect to the support 1 30 on. In the cage there are six radial grooves 31 that can be moved. Pressure medium is now milled through plane-parallel boundary surfaces, which are fed to the nozzle 3 b via the piston 4 α , with the cylinder 2 α with the upper gripper head 20 at the end of the cage extending from the upper end of the cage to close to the lower 5. Is lifted into the cylindrical part. It is essential that the upper 30 of the cage is an annular groove 32 from the outside, a gripper set of the gripper head 20 rotated from the associated one, in which an open, resilient wire ring piston 24 is lifted so that none of the upward 33 is inserted. The wire ring 33 passes through clamping forces that prevent drilling movement. If the stanchions 34 of the gripper 35 with plane-parallel sides, io cylinder has its upper end position according to FIG. 2 reached so that they are inserted into the grooves 31. The gripper 35 is the pressure medium supply to the two gripper types on the inside of a toothing 36 and reversed again on the heads, so that a further stroke outside inclined wedge surfaces 37, whose ney cycle begins in the manner described. The inclination of the inclination of the conical contact direction can be reversed in that the alternating surfaces 26 correspond. The grippers 35 are kept movable by the pressure medium supply to the gripper heads around wire ring 33 in the axial and radial direction, which requires no further explanation 36 firmly pressed against the support 1, but also one of the units according to FIGS. 2 to 4, in both of which can be clearly detached from the same. Let it run in the directions corrective while lifting the Fig. 5 and 6, the replacement gripper has the task of generating ao force. It is also possible to use the borrowed advantage that the gripper provided with plane-parallel side loads can be connected very easily to one of the gripper heads or lower gripper heads 20 or 41 at will.
art low price can be made that the hoists according to F i g. 1 and 2 are used grippers that are not being re-sharpened must be particularly good for operation with water instead of oil. These can be thrown away and replaced with new ones. The latter option depends on the execution. The replacement is extremely easy, as shown in FIG. 1 together with the fact that the compartment, in that only the wire ring 33 is completely separated from the housing, which needs to be expanded, by only the wire ring 33 being so far apart that it comes out of the groove 32, the spring 10. In addition, the piston rod 5 is in one occurs, whereupon the wire ring with the grippers is lifted up after the axially rather long guide extension 44 of the cylinder and then the worn gripper is guided by the 30 ders, so that it is extremely unlikely that the wire ring will be stripped off and new grippers put on, that water from the cylinder through the piston ends can. Then the grippers are to be reinserted into the rod seal and along the piston rod up to the grooves 31 and the wire ring 33 could seep through the spring housing,
push the conical part 29 into the groove 32. The connection of the drive units with the

The gripper set 35 shown at the top of FIG the end face 39 of one of the disks corresponding to the ring 17 can preferably be supported or supported on a special ring 40 screwed onto the gripper head of the cylinder la. 40 can be connected to these disks, which at

The lower gripper head 41 according to FIG. 4 is similar to the connection points of two units without Verausged like the upper gripper head according to FIG. 3, screw connection removable between the same one the difference is that only a single action is set. The springs 16 can also both with the cylinder is present, which via a stat of such a disc as well as with the cage 27 of a zen 42 can be acted upon with pressure medium. 45 gripper set, which means that the maintenance of the The piston 43 of this cylinder is also very relieved with a device.

conical contact surface 26 provided, which is on the gripping. According to FIG. 7, the grippers 135 and the

fer 35 of a gripper set act. Cage 127 of the gripper sets in the upper part with in one

The climbing hoist, consisting of the internal grooves 136, which lie in a double common radial plane

acting drive unit according to FIG. 2 and the 50, in which a ring wire 137 is inserted

Gripper heads according to FIGS. 3 and 4, works as follows: is to prevent the gripper from tilting inwards.

When the piston 4 α with the lower gripper so that the placement of the climbing hoist on head 41 in the lower end position according to FIG. 2, the support 1 can be made much easier,
finds, pressure medium is applied to the upper gripper head 20. 8 to 10, as a result of which the two pistons 24 and 25 55 are pushed against the gripper sets against lateral tilting and the grippers are protected by the fact that they are provided with longitudinal grooves 236, fer 35 pressing against the support 1. The gripper head 20, which is inwardly forward in the grooves 231 of the cage 227, will thus engage in both directions on the standing longitudinal strips 237. The gripper 235 support 1 is locked. At the same time the pressure supply will thus have some radial play and can be interrupted at any time to the lower gripper head 41, so that the 60 are released from the support 1 regardless of possible dimensional accuracy of the grippers 35 of this head. The even den. Then pressure medium is supplied through the connection of the gripper 235 against the outer side of the support, 3 α under the piston 4 α, so that this, depending on possible dimensional accuracy of the piston with the lower gripper or the support released from the support 1, is through from below against Gripper head 41 is raised. If the piston 65 has reached the upper end position of the compression springs 238 acting on each gripper 235, then the lower gripper is provided.

ferkopf 41 supplied pressure medium, whereby this to The arrangement can also be made the other way round

the support 1 is fixed while the pressure is being applied, i.e. the grooves can be made in the walls of the

Grooves of the cage be incorporated, while the gripper can be provided with strips.

Claims (5)

Patent claims: 1. Hydraulic climbing hoist for gradually conveying a load along a support, in which a gripper head is connected to the cylinder or the piston with a set of several grippers, which lie with wedge surfaces inclined to the support axis within a conical surface of the gripper head and one to the Have parallel toothed surfaces, characterized in that each set of grippers (35, 135, 235) is arranged in a manner known per se in a one-piece annular cage (27, 127, 227), the radially continuous grooves (31, 231) with essentially plane-parallel Has side surfaces in which the parallel side surfaces having grippers (35, 135, 235) are held movable to a limited extent by securing means (33, 137, 236) engaging the cage with the toothed surface parallel to the support axis. 2. climbing hoist according to claim 1, characterized in that the gripper (35) by little at least one anchored in the cage (27), penetrating an opening (34) of each gripper (35) with play Wire ring (33) are held and with a flat end face on a base of the cage issue. 3. Climbing hoist according to claim 1 and 2, characterized in that the grippers (35) at opposite ends by a wire ring (33, 137) or the like. Are held. 4. Climbing hoist according to claim 1, characterized in that with radial play interlocking grooves and strips (236 or 237) of the gripper (235) or the cage (22) secure the gripper against lateral, radial tilting. 5. climbing hoist according to claim 4, characterized in that the grooves (236) in the grippers (235) and the strips (237) are provided in the grooves of the cage. Considered publications:
German Patent Nos. 400 705, 925193;
Patent No. 25 847 of the Office for Patents and Invention in East Berlin;
British Patent No. 949 420;
U.S. Patent No. 1895 132. 1 sheet of drawings 809 619/93 9.68 © Bundesdruckerei Berlin