FR2523107A1 - CYLINDRICAL LIFTING DEVICE - Google Patents

Abstract

IN A CYLINDRICAL LIFTING DEVICE FOR MOVEMENT AND CONTROL PROCESSES IT IS MOUNTED BETWEEN A WORKING CYLINDER 1 AND A PLUNGER 2 GUIDED BY RINGS 3 A BELLOW 4 IN COATED TEXTILE FOLDED INSIDE ITSELF AND MUNIED OF A VALVE FOR THE FLUID UNDER PRESSURE, THE WORKING CYLINDER 1 WITH STOPPING DEVICES 7 CAPABLE OF IN ANY POSITION INSIDE THE LIFTING STROKE TO FULFILL A SUPPORT FUNCTION AND SEVERAL LIFTING DEVICES OF THIS KIND CAN BE MOUNTED TELESCOPICALLY INTO EACH OTHER TO INCREASE THE LIFTING HEIGHT FOR UNCHANGED EXTERNAL DIMENSIONS.

Description

i

Cylindrical lifting device.

  The present invention relates to a lifting device

  cylindrical ge for movement and control process of machines and devices It can be used in the in-

  industry and in the field of construction especially during

  that it's about achieving flexible movement processes

  without sudden stop and with a high yield.

  To carry out movement and com-

  In particular, in the lifting process, it is known in the industry and in the construction field to use cylindrical pistons, levers and spindles. In the case of heavy loads, these members are prone to incidents and must constantly be the subject of work

  Most of the devices mentioned do not perform

  attempt the movement process only with constant force

  and often work with a sudden stop.

  Cylindrical lifting devices are known which consist of an elastic tubular casing made of synthetic material and discs disposed frontally In the state

  free of constraints the middle annular area of the envelope

  loppe is flexed inward in a V shape.

  plastic stretch pe considerably limits the lifting height and force and stop devices make

default.

  To produce an alternative movement we know

  also a lifting device consisting of an envelope-

  pe, a positively guided lifting device on the front side

  and a fluid chamber disposed between the latter The chamber

  bre to fluid is limited by a flexible and elastic hollow body

  tick closed on all sides and fluid tight The guide

  despite the costly construction,

  teuse that insufficient lateral stability and in the case of known construction the effective lifting height is restricted There is no possibility of forming a

  telescopic structure from several individual elements

  fuel and stop devices are missing.

  The object of the present invention is to create a device

  cylindrical lifting device meeting severe requirements

  res with regard to performance and which due to its

  low manufacturing cost lends itself to mass production

se.

  The object of the invention is to provide a device

  lifting tif of a construction as simple as possible

  so as to allow it to perform, even in case of

  rigorous design in terms of lifting force, flexible and safe movement processes as well as with

  a relatively large lifting height.

  This object is achieved according to the invention by the fact that between a working cylinder and a plunger is

  mounted a coated textile bellows folded inside

  inside itself and fitted with a valve for the pressurized fluid The working cylinder can have any cross-section

  desired but must in any case have rounded angles.

  Guide rings guarantee exact guidance of the cylinder.

  dre working on the outer guide wall or the

  perforated outer guide structure of the plunger.

  The warp and weft threads of the bellows extend in the cylindrical part of the latter so as to form an angle

  about 450 with the longitudinal axis The working cylinder

  vail and the outer guide wall of the plunger have stop members which in any position

  inside the lift stroke can fulfill a function-

  Using the inside of the plunging pistons

  Several lifting devices can be mounted

  one inside the other The external guide wall of the plunger can also be produced

  in the form of an openwork structure If the position of the

  positive lifting is reversed so that the piston plun-

  geur leaves the cylinder then, to reduce the stroke length, additional load-receiving members are arranged at the basic height To move uniformly large complex structures Several lifting devices

  are mounted in parallel The fluid supply under pressure

  This is preferably done from a single source. In this regard, additional control mechanisms are not necessary. By varying the ratio of height to width the lifting device according to the invention can be manufactured

  in all sizes and in accordance with all requirements

  these lifting force corresponding to the operating conditions

  The lifting device is of a material-saving type, easy to handle, easy to manufacture and simple to maintain. The method of guiding the working cylinder in the plunger allows an optimal ratio of the stroke length to be obtained. the construction height This effect is further increased by mounting several lifting devices telescopically one inside the other. The stop devices guarantee flawless safety at any lifting height and in the event of failure. according to the invention allows to move

  economically the most diverse structures.

  The invention is explained in more detail below at

  using an exemplary embodiment illustrated in the drawings an-

  attached to which: Figure 1 is a section of the lifting device in the retracted state; Figure 2 is a section of the lifting device in the extended state;

  FIG. 3 shows in section, in the retracted state, the devices

  lifting positives telescopically mounted one inside the other; and

  FIG. 4 shows in section, in the extended state, the devices

  lifting positive telescopically mounted one inside the other.

  Figures 1 and 2 show a device for

  cylindrical face consisting of a working cylinder 1, a

  plunger 2, guide rings 3 and a bellows 4.

  The constituent elements operate according to the principle of the working cylinder cooperating with a plunger. A pressurized fluid, for example air, is supplied by a discharge pipe fixed to a valve 5 which can be produced in the form of a tap} i two-way with overpressure protection Under the effect of the pressure the working cylinder 1 moves away from the plunger 2 Guide rings 3 fixed to the end of the working cylinder 1 and to the end of the outer guide wall of the plunger 2 provides exact guidance to the

  during this lifting process The guide rings 3 ga-

  guarantee the maintenance of the interval between the plunger

  geur 2 and the working cylinder 1 for the bellows 4 and serve at the same time as a stopper 6 The working cylinder 1

  also has stops 6 for the retracted state of the

  lifting device The working cylinder 1 and the guide wall

  dage outside the plunger 2 have stop members 7 which in any position within the lift stroke can fulfill a support function The wires

  bellows 4 warp and weft in textile material

  pick, which has returned inside itself, extends

  tooth in its cylindrical part so as to make an angle of about 450 with the longitudinal axis To the bellows 4 are brought only small quantities of pressurized fluid which

  communicate a relative movement to the lifting device

slow, flexible and energetic.

  Figures 3 and 4 show devices for

  vage telescopically mounted one inside the other They consist of the individual elements already mentioned, the plunger 2 of the external lifting device forming

  at the same time the working cylinder 1 of the lifting device

  inner thread The guide ring 3 of the lifting device

  inner ge slides on the outer guide wall of the plunger 2 of the outer lifting device Between

  the bellows 4 is mounted a connecting member 8, for example

  ple a quick coupling, which ensures the transfer of the fluid

under pressure.

REVEI DTCATIONIS

  1 cylindrical lifting device, characterized in that between a working cylinder (1) of any cross section,

  with or without rounded corners, and a plunger (2) which

  diced in a precise manner by guide rings (3) is mounted a bellows (4) made of coated textile material yes is folded up inside itself and whose warp and weft threads extend in its cylindrical part so as to make

  an angle of about 450 with the longitudinal axis, which suffers

  flet is provided with a valve (5) for the pressurized fluid, in that the working cylinder (1) has members

  stop (7) which in any position inside the court-

  lifting can perform a support function and in that by using the interior of the plungers (2),

  to increase the lifting height for dimensions ex-

  unchanged, other lifting devices

  killed by a plunger (2), guide rings (3), a bellows (4), a valve (5), stop members (7) and a connecting member (8) are telescopically mounted

into each other.

  2 Cylindrical lifting device as claimed

  cation 1, characterized in that the outer guide wall

  re of the plunger (2) can be made in the form

  of an openwork structure by providing openings.

  3 Cylindrical lifting device as claimed

  cation 1, characterized in that in the case where the device

  lifting is used in the inverted state so as to bring out

  pull the plunger (2) from the cylinder, from the receiving

  additional load headers are mounted at the level of the

  stop nes (7) to reduce the stroke length.

  4 Cylindrical lifting device according to one

  conch of claims 1 to 3, characterized in that for

  move large, complex structures evenly

  if their lifting devices are mounted in parallel, the

  mentation in fluid under pressure preferably carried out

  from a single source, without any other mechanism

order.