EP3527748B1 - Method and apparatus for making telescopic props - Google Patents
Method and apparatus for making telescopic props Download PDFInfo
- Publication number
- EP3527748B1 EP3527748B1 EP18425008.2A EP18425008A EP3527748B1 EP 3527748 B1 EP3527748 B1 EP 3527748B1 EP 18425008 A EP18425008 A EP 18425008A EP 3527748 B1 EP3527748 B1 EP 3527748B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubular body
- rollers
- series
- making
- incisions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 25
- 238000004080 punching Methods 0.000 claims description 23
- 230000000007 visual effect Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000002441 reversible effect Effects 0.000 description 3
- 239000000976 ink Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
- B21C51/005—Marking devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/005—Marking-out or setting-out work for pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
- B26F1/20—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
Definitions
- the present invention finds application in the production systems for supports (props) adjustable in length, mostly used in the building sector.
- the present invention refers to a process for obtaining on the aforementioned telescopic props a scale for measuring and adjusting the length of the prop itself.
- the telescopic props are generally constituted by a fixed portion having a substantially tubular shape with a circular cross-section.
- the fixed portion has a first end typically provided with a floor support, or other similar support element, to be placed on a reference plane.
- a second open end extends, able to receive a respective movable portion within the fixed portion.
- the movable portion also has a substantially tubular shape with a circular cross-section and is slidably inserted into the fixed portion to be moved axially with respect to the fixed portion itself.
- the length of the entire prop is determined according to the various needs of use.
- the movable portion has an end opposite to the first end of the fixed portion, and configured to be supported on a respective surface to be supported, such as, for example, a ceiling, a wall of a formwork, or in general any structure to be supported by the prop.
- reversible hooking systems such as, for example, a pin that can be inserted in appropriate coincident holes formed on both portions.
- the movable portion has a series of through holes, appropriately spaced apart and arranged linearly along the longitudinal extension of the movable portion.
- a visual reference is preferably provided, such as a graduated scale and/or a numbering, suitable for providing a measurement of the length of the prop.
- the visual references are obtained by a marking drawn by means of suitable inks or other printing methods, and arranged at the holes to provide, for each hole, a respective length indication.
- the deformation step of the flat element suitable for the tubular formation is controlled based on the positioning of the holes and the incisions, thus making the whole control system particularly complex and prone to errors in the welding steps.
- the member has two counter-rotating wheels arranged on the sides of the body.
- the reference number 1 globally indicates an apparatus for making telescopic props 2.
- prop 2 means an element mostly used in the building sector, which is provided with two tubular bodies 3, 4 telescopically coupled to slide axially and define the height of the entire prop 2.
- the present invention finds particular application for the realization of the internal tubular body 3 known to have a series of visual references 5 representative of the length of the prop 2.
- the prop 2 is provided with a first tubular body 3, inside a second tubular body 4 and axially slidable with respect to the second body 4 to define the length of the prop 2.
- Both the tubular bodies 3, 4 have a substantially cylindrical shape with a circular cross-section.
- both bodies can be provided at respective opposing ends of supports 6 (for example floor supports) adapted to rest on the respective surfaces to be supported.
- supports 6 for example floor supports
- the first tubular body 3 also has a series of through holes 7 arranged along the longitudinal extension of the body 3 itself. Inside the holes 7 suitable reversible hooking systems (not shown) are inserted to keep the bodies 3, 4 constrained to each other once the length of the entire prop 2 has been adjusted. The reversible hooking systems act on through holes 7 formed in the first tubular body 3, and are not described and illustrated in detail as they are of known type and are not part of the present invention.
- the holes 7 are formed along two opposite longitudinal lines of the tubular body 3.
- the visual references 5 are arranged between the holes 7, as advantageously illustrated in Figure 3 .
- an apparatus 1 is provided for making telescopic props 2 of the type described above.
- the apparatus 1 comprises a feed line "L" for a first tubular body preformed 3 provided with feeding means 8 adapted to move the body 3 in a longitudinal direction, that is, with the respective longitudinal axis of extension coinciding with the feed line "L".
- the feeding means 8 consist of a series of feed rollers 9 arranged along the line "L", and configured to engage the cylindrical outer surface of the tubular body 3 by rolling friction.
- Each roller 9 is suitably motorized and controlled by respective management systems not described in detail as of known type and adapted to feed the tubular body 3 at predetermined speeds.
- the apparatus 1 further comprises a forming station 10, shown in detail in Figure 2 , to realize a series of surface incisions on the outer surface of the tubular body 3.
- Each incision which constitutes a visual reference 5 on the tubular body 3, is representative of a measurement information of the prop 2.
- a pickup station 11 of the preformed and finished tubular body 3 is further developed downstream of the forming station 10.
- the pick-up station 11 preferably has a gripper 12 movable transversely to the line "L", to grip the tubular body 3 exiting the forming station 10, and to feed it to a further line for assembling it with the second tubular body 4 (not shown as not being part of the present invention).
- the forming station 10 comprises a punching member 13 for making the incisions simultaneously with the continuous feed of the tubular body 3.
- the punching member 13 consists of a pair of counter-rotating rollers 14, 15 facing each other and each of which having an annular surface 14a, 15a in contact with the surface of the tubular body 3.
- the tubular body 3 is arranged between the annular surfaces 14a, 15a of the aforementioned counter-rotating rollers 14, 15.
- each annular surface 14a, 15a of the rollers 14, 15 has projections (not shown in detail) defining the incisions, which are carried out on the tubular body 3.
- protrusions are shaped according to the symbol to be impressed on the surface of the body 3.
- rollers 14, 15 grasp and advance the body 3 along the line "L" and, at the same time, the pressure exerted by the projections formed on the annular surfaces 14a, 15a define the mentioned incisions.
- the rollers 14, 15 are also suitably motorized and controlled by a management system, which operates on the rotation speed of the rollers. Moreover, in order to carry out a single superficial scratching of the tubular body 3, without thereby damaging the shape of the body 3 itself, movement means 16 for the pair of rollers 14, 15 are provided for moving the rollers 14, 15 themselves away and towards each other according to the cross-sectional dimensions of the tubular body 3.
- the movement means 16 comprise a pair of slides 17 movable away and towards each other along a direction substantially perpendicular to the feed line "L".
- the slides 17 are suitably motorized to move relative to each other and each of which is arranged to support a respective roller 14, 15.
- the movement means 16 place optimally the distance of the rollers 14, 15.
- annular surfaces 14a, 15a can be removed and replaced according to the type of visual reference 5 to be impressed on the tubular body 3.
- the present invention relates to a method for making telescopic props 2.
- This method comprises the step of feeding the first preformed tubular body 3 along the feed line "L".
- tubular body 3 in addition to being already in the form of a tube, is already provided with the aforementioned through holes 7 made previously to the step of feeding the tubular body 3 along the feed line "L".
- each incision is a visual reference 5 which is representative of a measurement information of prop 2.
- a step is also carried out to telescopically connect the first tubular body 3 inside a second tubular body 4, which is also preformed, to define the telescopic prop 2.
- the step of feeding the tubular body 3 is carried out by a series of feed rollers 9 to move the body 3 itself along the feed line "L" corresponding to its longitudinal extension axis.
- the step of making a series of incisions is carried out by a punching step of the outer surface of the tube 3.
- this punching step is carried out continuously without stopping the feeding of the body 3 along the feed line "L".
- the punching step is carried out by the aforementioned pair of counter-rotating rollers 14, 15, facing each other and spaced apart to allow the passage of the tubular body 3.
- At least one roller 14, 15, preferably both the rollers are rotated on the outer surface of the body 3 to engrave on this external surface a series of visual references 5.
- the punching step is also carried out by distancing the two rollers 14, 15 from each other according to the cross-sectional dimensions of the tubular body 3. In this way, the body 3 is only scratched superficially to make the incisions, without any deformation of the circular shape of the body 3.
- the present invention solves the drawbacks of the prior art mentioned above and has important advantages.
- the method and the relative apparatus 1 simplify and significantly reduce the production times of each prop 2, given the continuous processing in the step of making the visual references 5.
- the method and the apparatus 1 are particularly versatile as they can be adapted to the various dimensions and needs of the tubular portions 3.
- the distance of the rollers 14, 15 can be varied to adapt them to the dimensions of the body 3 and to define the degree of engraving of the references 5.
- annular surfaces 14a, and 15a of the rollers 14, 15 can be removed and replaced in order to obtain visual references 5 of different types.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
- The present invention relates to a method and apparatus for making telescopic props.
- In particular, the present invention finds application in the production systems for supports (props) adjustable in length, mostly used in the building sector.
- Even more particularly, the present invention refers to a process for obtaining on the aforementioned telescopic props a scale for measuring and adjusting the length of the prop itself.
- The telescopic props are generally constituted by a fixed portion having a substantially tubular shape with a circular cross-section.
- The fixed portion has a first end typically provided with a floor support, or other similar support element, to be placed on a reference plane.
- On the opposite side of the first end, a second open end extends, able to receive a respective movable portion within the fixed portion.
- The movable portion also has a substantially tubular shape with a circular cross-section and is slidably inserted into the fixed portion to be moved axially with respect to the fixed portion itself.
- In this way, by means of the sliding of the movable portion, the length of the entire prop is determined according to the various needs of use.
- In this context, it should also be specified that the movable portion has an end opposite to the first end of the fixed portion, and configured to be supported on a respective surface to be supported, such as, for example, a ceiling, a wall of a formwork, or in general any structure to be supported by the prop.
- In order to constrain the movable portion relative to the fixed portion in position, there are also provided reversible hooking systems, such as, for example, a pin that can be inserted in appropriate coincident holes formed on both portions.
- In greater detail, the movable portion has a series of through holes, appropriately spaced apart and arranged linearly along the longitudinal extension of the movable portion.
- The fixed portion in turn has an opening, generally a slot, formed at the respective second end, close to the movable portion.
- In this way, once the height of the prop is adjusted by sliding the movable portion, it is locked by inserting the pin through the slot and the respective hole of the movable portion.
- It should be noted that, for each height defined by the movable portion, a respective hole is always positioned at the slot.
- In order to precisely adjust the position of the movable portion with respect to the fixed portion, a visual reference is preferably provided, such as a graduated scale and/or a numbering, suitable for providing a measurement of the length of the prop.
- According to a first known art, the visual references are obtained by a marking drawn by means of suitable inks or other printing methods, and arranged at the holes to provide, for each hole, a respective length indication.
- However, this solution is not reliable as the markings tend to be damaged and removed over time, thus making it impossible to read the length indications.
- In this regard, it should be considered that the axial sliding of the movable portion in the fixed portion results in the rubbing of the respective tubular surfaces.
- This rubbing action involves over time the partial removal of the ink layer impressed on the eternal surface of the fixed portion.
- To overcome this drawback, visual references are also known that are impressed by punching on the outer surface of the tube as described in
WO 2010/137984 A1 . - In this way, the visual references are engraved on the visible surface of the movable portion, preventing them from being removed over time.
- An example of such a solution is described in the patent
EP0765981B1 in which the mobile element undergoes a punching step before being shaped in a tubular form. - In particular, in this situation a flat element, in the form of a ribbon made of metallic material, is fed along a punching machine.
- The flat element is intermittently advanced to allow the punching machine to make consecutive holes, and subsequently, or simultaneously, the numerical incisions.
- Such incisions can be obtained both between the holes and laterally to the holes in order to provide greater visibility of the length of the prop.
- Once the incisions have been made, the plane element is deformed and bent on itself. The opposite edges of the flat element are therefore brought together and mutually welded to define the tubular configuration.
- This solution, although able to guarantee greater reliability, since the visual references are engraved on the tubular portion, is not free from important drawbacks.
- Firstly, it should be noted that the punching step is carried out by intermittently advancing the plane element, precisely to allow the punch to perform the incision at the moment of stopping the advancement.
- This intermittent advancement leads to an important slowdown in the entire production cycle of the props, resulting in disadvantages in terms of total production costs.
- Moreover, the whole process, as well as the structure of the punching machine, are structurally complex, given the need to perfectly shape the tubular portion according to the through holes and the respective numerical references.
- In other words, the deformation step of the flat element suitable for the tubular formation is controlled based on the positioning of the holes and the incisions, thus making the whole control system particularly complex and prone to errors in the welding steps.
- In addition, this method is not very versatile and difficult to be adapted to the various, possible dimensions of the portions, and therefore also of the respective numerical incisions.
- In this context, the technical task underlying the present invention is to propose a method according to
claim 1 and apparatus according toclaim 9 for making telescopic props able to overcome the drawbacks of the prior art mentioned above. - In particular, it is an object of the present invention to provide a method for making props able to simplify and significantly reduce the production times of each prop, in particular in the step of making the visual references.
- The present invention also aims at providing an apparatus for making telescopic props, which is reliable, structurally simple and inexpensive. Finally, another object of the present invention is to propose a method and apparatus for making props, which is versatile and adaptable to the various, possible dimensions of the tubular portions, and to the type of visual reference.
- The mentioned technical task and the specified aims are substantially achieved by a method and apparatus for making tubular props, including the technical specifications set out in one or more of the appended claims. According to the present invention, a method for making telescopic props s described, which comprises the steps of feeding a first tubular body preformed along a feed line; said tubular body having a series of through holes formed along the same longitudinal extension line of the tubular body; and simultaneously making a series of incisions at said through holes, each incision being representative of a measurement information of said prop.
- According to the invention the incisions are made by means of a punching step carried out continuously by two counter-rotating rollers.
- According to the present invention an apparatus for making telescopic props is also shown, comprising: a feed line for a first tubular body preformed having feeding means for moving the body with the respective longitudinal extension axis coinciding with said feed line; a forming station for forming a series of surface incisions on the outer surface of the tubular body, each incision being representative of a measurement information of said prop; and a pickup station of the preformed tubular body arranged downstream of said forming station.
- According to the invention the forming station is provided with a punching member which carries out the continuous incisions during the advancement of the tubular body.
- For this purpose, the member has two counter-rotating wheels arranged on the sides of the body.
- Further characteristics and advantages of the present invention will become more apparent from the description of a exemplary, but not exclusive, and therefore non-limiting preferred embodiment of a method and apparatus for making telescopic props, as illustrated in the appended drawings, in which:
-
Figure 1 shows a perspective and schematic view of an apparatus for making props according to the present invention; -
Figure 2 shows a perspective view of a constructive detail of the apparatus ofFigure 1 ; and -
Figure 3 shows a partially sectioned side view of a prop obtained by the method object of the present invention. - With reference to the attached figures, the
reference number 1 globally indicates an apparatus for makingtelescopic props 2. - It should be specified that the
term prop 2 means an element mostly used in the building sector, which is provided with twotubular bodies entire prop 2. - In this context, the present invention finds particular application for the realization of the internal
tubular body 3 known to have a series ofvisual references 5 representative of the length of theprop 2. - In particular, with reference to
Figure 3 , theprop 2 is provided with a firsttubular body 3, inside a secondtubular body 4 and axially slidable with respect to thesecond body 4 to define the length of theprop 2. Both thetubular bodies - Furthermore, both bodies can be provided at respective opposing ends of supports 6 (for example floor supports) adapted to rest on the respective surfaces to be supported.
- The length of the
prop 2 can therefore be variable according to the various needs of use and it is determined with the aid of the aforementionedvisual references 5 impressed by incision on the outer surface of the firsttubular body 3. - The first
tubular body 3 also has a series of throughholes 7 arranged along the longitudinal extension of thebody 3 itself. Inside theholes 7 suitable reversible hooking systems (not shown) are inserted to keep thebodies entire prop 2 has been adjusted. The reversible hooking systems act on throughholes 7 formed in the firsttubular body 3, and are not described and illustrated in detail as they are of known type and are not part of the present invention. Theholes 7 are formed along two opposite longitudinal lines of thetubular body 3. Preferably, thevisual references 5 are arranged between theholes 7, as advantageously illustrated inFigure 3 . - However, the position and the dimensions of the
visual references 5 can be any according to the various needs of use. - Again, the
references 5 may consist of numbers and/or writings and/or a graduated scale. - Also in this case, the dimensions, the shape and the type of the
references 5 can vary and be determined according to the various needs. - Purely by way of a non-limiting example,
Figure 3 illustratesvisual references 5 in the form of numbers arranged one above the other and each of them interposed between tworespective holes 7. - As mentioned above, according to the present invention an
apparatus 1 is provided for makingtelescopic props 2 of the type described above. - The
apparatus 1 is in particular used for making thevisual references 5 starting from the already preformedtubular bodies - The
apparatus 1 comprises a feed line "L" for a first tubular body preformed 3 provided with feeding means 8 adapted to move thebody 3 in a longitudinal direction, that is, with the respective longitudinal axis of extension coinciding with the feed line "L". - Preferably, the feeding means 8 consist of a series of
feed rollers 9 arranged along the line "L", and configured to engage the cylindrical outer surface of thetubular body 3 by rolling friction. Eachroller 9 is suitably motorized and controlled by respective management systems not described in detail as of known type and adapted to feed thetubular body 3 at predetermined speeds. - The
apparatus 1 further comprises a formingstation 10, shown in detail inFigure 2 , to realize a series of surface incisions on the outer surface of thetubular body 3. - Each incision, which constitutes a
visual reference 5 on thetubular body 3, is representative of a measurement information of theprop 2. - A
pickup station 11 of the preformed and finishedtubular body 3 is further developed downstream of the formingstation 10. - The pick-up
station 11 preferably has agripper 12 movable transversely to the line "L", to grip thetubular body 3 exiting the formingstation 10, and to feed it to a further line for assembling it with the second tubular body 4 (not shown as not being part of the present invention). - With particular reference to
Figure 2 , according to the invention, the formingstation 10 comprises a punchingmember 13 for making the incisions simultaneously with the continuous feed of thetubular body 3. - For this purpose, the punching
member 13 consists of a pair ofcounter-rotating rollers annular surface tubular body 3. In this situation, thetubular body 3 is arranged between theannular surfaces counter-rotating rollers annular surface rollers tubular body 3. - These protrusions are shaped according to the symbol to be impressed on the surface of the
body 3. - In this manner, the
rollers body 3 along the line "L" and, at the same time, the pressure exerted by the projections formed on theannular surfaces - The
rollers tubular body 3, without thereby damaging the shape of thebody 3 itself, movement means 16 for the pair ofrollers rollers tubular body 3. - In particular, the movement means 16 comprise a pair of
slides 17 movable away and towards each other along a direction substantially perpendicular to the feed line "L". - The
slides 17 are suitably motorized to move relative to each other and each of which is arranged to support arespective roller - In this way, according to the dimensions of the
body 3, the tubular section and the degree of penetration of the projections designed to define the incisions, the movement means 16 place optimally the distance of therollers - Furthermore, in order to make the
whole apparatus 1 more versatile, theannular surfaces visual reference 5 to be impressed on thetubular body 3. - In addition, the present invention relates to a method for making
telescopic props 2. - This method comprises the step of feeding the first preformed
tubular body 3 along the feed line "L". - It should be noted that the
tubular body 3, in addition to being already in the form of a tube, is already provided with the aforementioned throughholes 7 made previously to the step of feeding thetubular body 3 along the feed line "L". - The
tubular body 3 is passed through the formingstation 10 in which a series of incisions are made at said throughholes 7. As described above, each incision is avisual reference 5 which is representative of a measurement information ofprop 2. - Following the step of making the incisions, a step is also carried out to telescopically connect the first
tubular body 3 inside a secondtubular body 4, which is also preformed, to define thetelescopic prop 2. - The step of feeding the
tubular body 3 is carried out by a series offeed rollers 9 to move thebody 3 itself along the feed line "L" corresponding to its longitudinal extension axis. - The step of making a series of incisions is carried out by a punching step of the outer surface of the
tube 3. - According to the invention this punching step is carried out continuously without stopping the feeding of the
body 3 along the feed line "L". - In fact, the punching step is carried out by the aforementioned pair of
counter-rotating rollers tubular body 3. - In this step, at least one
roller body 3 to engrave on this external surface a series ofvisual references 5. - The punching step is also carried out by distancing the two
rollers tubular body 3. In this way, thebody 3 is only scratched superficially to make the incisions, without any deformation of the circular shape of thebody 3. - The present invention solves the drawbacks of the prior art mentioned above and has important advantages.
- In particular, the method and the
relative apparatus 1 simplify and significantly reduce the production times of eachprop 2, given the continuous processing in the step of making thevisual references 5. - This advantage is provided precisely by the punching
member 13 constituted by the counter-rotating rollers, which carry out the incisions during the continuous feeding of thebody 3. - The production times of the
entire prop 2 are then reduced, resulting in advantages in terms of production costs. - Moreover, the method and the
apparatus 1 are particularly versatile as they can be adapted to the various dimensions and needs of thetubular portions 3. - Indeed, by means of the movement means 16, the distance of the
rollers body 3 and to define the degree of engraving of thereferences 5. - In addition, the
annular surfaces rollers visual references 5 of different types.
Claims (13)
- Method for making telescopic props, comprising the steps of:- feeding a first tubular body (3) preformed along a feed line (L); said tubular body (3) having a series of through holes (7) formed along the same longitudinal extension line of the tubular body (3); and- making a series of incisions (5) at said through holes (7), each incision being representative of a measurement information of said prop (2);characterized in that said step of making a series of incision (5) is made during the feeding step of the first tubular body (3) along the feeding line (L) and in that said step of making a series of incisions (5) is carried out by means of a punching step of the outer surface of the tube (3).
- Method according to the previous claim, characterized in that it further comprises, following the step of making the incisions, a step of telescopically coupling said first tubular body (3) to a second preformed tubular body (4).
- Method according to any of the previous claims, characterized in that prior to the step of feeding the tubular body (3) along the advancement line (L), a step is carried out to drill the preformed tubular body (3) to obtain said holes (7).
- Method according to any of the previous claims, characterized in that said step of feeding the tubular body (3) is carried out by a series of feed rollers (9) to move the body (3) along the feed line (L) corresponding to its longitudinal extension axis.
- Method according to claim 1, characterized in that said punching step is carried out continuously without stopping the feeding of the body (3) along the feed line (L).
- Method according to claim 5, characterized in that said punching step is carried out by a pair of counter-rotating rollers (14, 15), facing each other and spaced apart to allow the passage of the tubular body (3).
- Method according to the previous claim, characterized in that said punching step is carried out by rotating at least one roller (14, 15) on the outer surface of the body (3) to engrave on said external surface a series of visual references (5).
- Method according to claim 6, characterized in that said punching step is carried out by distancing the two rollers (14, 15) from each other according to the cross-sectional dimensions of the tubular body (3).
- Apparatus for making telescopic props, comprising:- a feed line (L) for a first tubular body preformed (3) having feeding means (8) for moving the body with the respective longitudinal extension axis coinciding with said feed line (L);- a forming station (10) for forming a series of surface incisions (5) on the outer surface of the tubular body (3), each incision being representative of a measurement information of said prop; and- a pick-up station (11) of the preformed tubular body (3) arranged downstream of said forming station (10);characterized in that said forming station (10) comprises a punching member (13) for making incisions simultaneously with the continuous feed of the tubular body (3).
- Apparatus according to the preceding claim, characterized in that said feed line (L) comprises a series of feed rollers (9) arranged along the feed line and configured to engage the cylindrical outer surface of the tubular body (3) by rolling friction.
- Apparatus according to claim 9, characterized in that said punching member (13) comprises a pair of counter-rotating rollers (14, 15), facing each other and each of which having an annular surface (14a, 15a) in contact with the surface of the tubular body (3), said tubular body (3) being arranged between the annular surfaces (14a, 15a) of said rollers (14, 15).
- Apparatus according to the preceding claim, characterized in that each annular surface (14a, 15a) has projections defining the incisions (5) on the tubular body (3); said projections being shaped according to the symbol to be impressed on the surface of the body (3).
- Apparatus according to claim 11, characterized in that said punching member (13) further comprises movement means (16) for said pair of rollers (14, 15) for moving the rollers (14, 15) themselves away and towards each other according to the cross-sectional dimensions of the tubular body (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18425008.2A EP3527748B1 (en) | 2018-02-15 | 2018-02-15 | Method and apparatus for making telescopic props |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18425008.2A EP3527748B1 (en) | 2018-02-15 | 2018-02-15 | Method and apparatus for making telescopic props |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3527748A1 EP3527748A1 (en) | 2019-08-21 |
EP3527748B1 true EP3527748B1 (en) | 2024-05-22 |
EP3527748C0 EP3527748C0 (en) | 2024-05-22 |
Family
ID=61801871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18425008.2A Active EP3527748B1 (en) | 2018-02-15 | 2018-02-15 | Method and apparatus for making telescopic props |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3527748B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111660364A (en) * | 2020-05-27 | 2020-09-15 | 孙苗 | Automatic punching device for LED lamp tube |
CN111719890B (en) * | 2020-06-02 | 2021-10-26 | 东莞市大乘建筑工程技术有限公司 | Floor reinforcing and supporting system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2726450A (en) * | 1950-08-17 | 1955-12-13 | Clinton L Ware | Geometrical tracing machine |
US4441395A (en) * | 1981-06-29 | 1984-04-10 | Republic Tool & Manufacturing Corporation | Tube punching method |
EP0765981B1 (en) | 1995-09-26 | 2003-04-23 | DOKA Industrie GmbH | Incorporated control-aid for telescoping struts and method of realization |
CA2288561C (en) * | 1999-11-05 | 2006-10-24 | Michael Surina | Rotary punching apparatus |
DE102007010932A1 (en) * | 2007-03-05 | 2008-09-11 | Hünnebeck Group GmbH | Galvanized length-adjustable tubular steel support with markings and method of making the same |
NL2002948C2 (en) * | 2009-05-29 | 2010-11-30 | Scafom Internat B V | BUILDING STAMP. |
JP6272411B1 (en) * | 2016-08-05 | 2018-01-31 | 株式会社アマダホールディングス | Punch mold for stamping, mold set for stamping, and chamfering method |
-
2018
- 2018-02-15 EP EP18425008.2A patent/EP3527748B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3527748A1 (en) | 2019-08-21 |
EP3527748C0 (en) | 2024-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3527748B1 (en) | Method and apparatus for making telescopic props | |
EP0067260A1 (en) | Cannula needle for catheter | |
EP2090382A2 (en) | Method for cold-bending of pipes and the like | |
CN115283510B (en) | Pipe bending machine | |
EP2862702B1 (en) | Method for connecting an acoustic absorber made of foam material with the tyre interior of a vehicle tyre | |
EP2301872A1 (en) | Plastic film drawing device | |
ITUD20130029A1 (en) | TOWING AND STRAIGHTENING SYSTEM FOR METAL WIRES, AND ITS PROCEDURE OF TOWING AND STRAIGHTENING | |
EP3184184A1 (en) | Finishing station of a machine for producing square pipes | |
US20080226935A1 (en) | Tubular product and manufacturing method and manufacturing device thereof | |
US4063444A (en) | Offset pipe bending device | |
EP2729266B1 (en) | Method of forming a tubular member | |
US6418772B1 (en) | Centering device and method for U-bolt bending machine | |
EP3648909B1 (en) | Slew-actuated stamping station and a method for piercing a radial wall of a ring-shaped part | |
US20170305180A1 (en) | Printing plate forming method and cylindrical forming apparatus for printing plate | |
CN203959422U (en) | Air-expanding shaft | |
EP2644292A1 (en) | Apparatus and method for the straightening of pipes on profile machines | |
JP2633466B2 (en) | Guide device for pipe bending machine | |
HRP20191926T1 (en) | Method for manufacturing a slotted bearing housing | |
EP2275246A1 (en) | Plastic film drawing device | |
CN107234153A (en) | The veneer reeling machine of stop gauge is oriented to side | |
DE19753028A1 (en) | Measuring trolley for rotationally symmetric components | |
US3116779A (en) | Apparatus for locating pipe bends | |
DE3137858C1 (en) | Method and apparatus for regulating the bending of the strip edge in the production of helical-seam tubes | |
KR20010064198A (en) | Device for amending top grip of hot coil | |
KR102115365B1 (en) | Apparatus for forming the parts of aircraft |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20200221 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: E04G 25/06 20060101ALI20231212BHEP Ipc: B25H 7/00 20060101ALI20231212BHEP Ipc: B21D 28/36 20060101ALI20231212BHEP Ipc: B26F 1/20 20060101ALI20231212BHEP Ipc: B21C 51/00 20060101ALI20231212BHEP Ipc: E04G 25/04 20060101AFI20231212BHEP |
|
INTG | Intention to grant announced |
Effective date: 20240109 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602018069735 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
U01 | Request for unitary effect filed |
Effective date: 20240522 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20240531 |