Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
  • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
  • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
  • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
  • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
  • B65G49/068—Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G2249/00—Aspects relating to conveying systems for the manufacture of fragile sheets
  • B65G2249/04—Arrangements of vacuum systems or suction cups
  • B65G2249/045—Details of suction cups suction cups

Definitions

• the lifter has at least one arm (5) which carries two suction cups (7) mounted on a sliding sup ⁇ port.
• the arm (s) (5) is (are) rotated through an angle of ap- proximately 90 ° by a Connecting rod / cam System (13) on which at least one balancing jack (18) is mounted.
• the instal ⁇ lation also understood means for lateral displacement of the lifter and of the secondary conveyor (1). Very short operating cycles (of the order of 2 s) at reduced po er can be achieved with this installation.
• the invention relates to an installation for lifting and stacking or unstacking glass plates, and more particularly small plates (1 mx 1.5 m). It comprises a secondary conveyor (1), a lifter and a desk (24).
• the lifter is provided with at least one arm (5) carrying two suction cups (7) mounted on a sliding support, the said arm (s) (s) is (are) driven (s) in rotation by a angle of about 90 ° by a rod-crank system (13) on which is mounted at least one balancing cylinder (18)
• the installation also includes means for lateral movement of the lifter and secondary conveyor (1). Such an installation makes it possible to obtain very rapid rates (of the order of 2 s) for a reduced installed power.
• the invention relates to an installation for lifting glass plates, this operation consisting in bringing a gripped plate in a substantially horizontal position to a substantially vertical position, where it is deposited, in order to form piles (stacking) or else bringing a gripped plate in a substantially vertical position on a stack to a substantially horizontal position on a conveyor (destacking).
• the glass is obtained in the form of a strip (by the "float glass” process for example) which is then cut into plates.
• the belt and the plates are conveyed by one ( or more) horizontal main conveyor.
• French patent FR 8605 656 published under the number 2,597,453 describes a compact rapid lifting machine in which rates of 2 to 4 seconds are obtained by multiplying the number of gripping arms.
• gripping means suction cups
• the present invention provides an installation with a faster lifter of different design. More specifically, the installation includes for stacking:
• a lifter comprising:
• At least one arm comprising a support on which suction cups are attached connected to a vacuum means and arranged so as to pass between the rollers of the secondary conveyor to grip the plate
• a rod-crank system actuated by at least one motor cylinder acting on said arm (s) to obtain its
• said installation further comprising typically: at least one hydraulic balancing cylinder linked to said rod-crank system and also connected to a nitrogen accumulator so as to dampen the movements of the arm (s) and reduce the installed energy power,
• the installation comprises for the destacking: a secondary conveyor, placed in the extension of the main conveyor and on which the plates are deposited at a deposition station. - at the end and below said secondary conveyor, a lifter comprising:
• At least one arm comprising a support on which suction cups are fixed connected to a vacuum means and arranged so as to pass between the rollers of the secondary conveyor to deposit the plate
• a rod-crank system actuated by at least one motor cylinder acting on said arm (s) to obtain its (their ) rotation by an angle of about 90 around a horizontal axis perpendicular to the axis of the conveyor so as to bring the plates to the depositing station,
• Said installation further comprising typically:
• the movement on the motor cylinder is controlled so that the rotation of the arm obeys the Law:
• FIG. 1 shows a view of the installation in the axis of the secondary conveyor
• FIGS. 2A and 2B are side views (perpendicular to the axis of the conveyor);
• FIG. 3 shows in side section the arm with the support and the suction cups
• the glass plates parade on a conveyor line. To be lifted, they are derived on one or more spikes which are conveyors arranged perpendicular to the main conveyor line, they are lifted by lifting machines
• the main conveyor will be called the conveyor carrying the plates to bring them to the lifting installation.
• This installation according to the invention comprises a secondary conveyor of reduced length (of the order of 1 to 2 m for example) which is placed in the extension of the main conveyor.
• the secondary conveyor is identified (1), it is provided with rollers (2) on which the plate (3) is supported. The plate thus reaches the end of the secondary conveyor
• the secondary conveyor has a speed lower than that of the main conveyor, it becomes zero when the plate is at the gripping station.
• a plate passes from the main conveyor to the secondary conveyor when the previous plate has been gripped.
• the number of ears is then determined by a person skilled in the art as a function of lifting rates, conveyor speeds and lengths of the plates.
• the consecutive plates of the same dimensions to be raised are in the same position. - They are in abutment against stops (4) arranged at the end of the secondary conveyor;
• the plates to be lifted have the same dimensions and it can be seen that their lateral edges are practically aligned for a certain time (the unscrewing, that is to say the offset, being of the order of 10 mm on
• the lifting installation according to the invention also comprises a lifting device placed below and at the end of the secondary conveyor. It comprises at least one arm (5) comprising a support
• the number of arms, suction cups and the width of the support are determined by a person skilled in the art according to the dimensions of the plates to be raised.
• the fingers (6) have a sufficient length to allow the passage of the suction cups between the rollers (2).
• the lifter or the stops (4) are moved longitudinally so that the centers of the suction cups are close to the median axis of the plate ( axis perpendicular to the longitudinal axis and passing through the middle of the plate ) .
• the lifter and / or the secondary conveyor are moved sideways.
• the spacing between the fingers (6) depends not only on the spacing between two consecutive rollers of the conveyor but also depends on the width (direction perpendicular to the axis of the conveyor) of the plates and that it cannot be increased thoughtlessly this spacing. It cannot also be assumed that the glass plate extends beyond the suction cup significantly.
• Such lifters work well for glass plates called small in the glass industry, that is to say up to about 1.5 m in width and 1 m in length and the plates gripping station being located more than 25 mm from the lateral edge of the conveyor.
• FIG. 1 a single arm with two fingers and two suction cups
• the suction cups are of known type, they are connected to a vacuum system through which a suction effect is obtained in The suction cup and the glass plate is gripped. To let go of the plate, simply cut the vacuum by returning to atmospheric pressure. Each suction cup is mounted on a spring which allows it to adapt to plates of different thickness. To avoid the stops (4) when raising the plate, there are two solutions taken separately or in combination, consisting of:
• Second solution means for moving the arm (5) along its longitudinal axis.
• this displacement is obtained for example by means of an actuator (11) with short stroke automatically controlled mounted in the arm (5) to act on the support (8).
• the cylinder rod (9) is secured to a tongue (12) fixed to the support
• Said support surrounds the upper end of the arm (5) over a certain distance, so that, even in the raised position (cylinder rod extended), the support (8) still covers the arm (5 ) , in order to avoid the entry of dust (particularly glass ) into the arm.
• actuating means are inside the arm to be protected, only the energy supply means are or have an outlet outside (pipes for fluids for example).
• this displacement is obtained for example by means of a jack with an eccentric acting on the end of the arm not carrying suction cups.
• the other end of the arm (5) is rotated between the position corresponding to the arm, at the gripping station and that corresponding to the arm in position at the removal station (fig. A2).
• the planes of the conveyor and the desk being substantially horizontal, the angle of rotation is slightly greater than 90 (generally between 90 ° and 95 °).
• the rotation is obtained by means of a connecting rod-crank system (13) (fig. 4) mounted on a drive shaft (14) fixed to the arm (5) for example by solidifying the parts (5a ) and (5b) shown in Figures 3 and 5.
• a motor cylinder (15) (preferably hydraulic) integral with the crank pin (16) of the connecting rod (23) ( Figure 4) acts on the drive shaft (14) which itself rotates the arm (5) . It is also possible to provide a second motor cylinder (15 (integral with the crank pin (17) of the connecting rod (23), one cylinder being active for lowering the plate (rotation of the arm in one direction) and the other for raising the arm (return) This possibility is not shown in the figures According to the invention, at least one hydraulic balancing cylinder (18) is mounted on the connecting rod-crank system (13).
• This cylinder (18) has a pierced piston which then allows the passage of oil from one compartment of one cylinder to the other according to the movement of the piston rod (fig. 6).
• the jack (18) is also connected to a nitrogen accumulator (19) constituted by a container provided with a movable wall (20) separating it into two chambers. One (21) is closed and contains nitrogen, the other (22) is connected to the cylinder (18).
• a balancing cylinder (18) is necessarily mounted on the same crankpin as the motor cylinder (15) so that the energy accumulated during the descent of the arm to bring the plate to the deposition station is restored during the ascent of said arm, this accumulated energy being all the greater as the descending plate becomes motive from a certain angle.
• This embodiment is shown in Figure 4, the cylinder (18) being in solid lines.
• a second cylinder (18) can be added, it is then secured to the crank pin (17) of the connecting rod (23). In Figure 4, this arrangement corresponds to the cylinder (18) in dotted lines.
• the displacement of the rod of the motor cylinder (15) also causes the sliding of the rod of the balancing cylinder (18).
• This advantageous device allows the damping of movements (role of balancer) but also to reduce the installed power (role of energy recuperator).
• the motor cylinder is then automatically controlled to generate this law on the arm.

Landscapes

• Sheets, Magazines, And Separation Thereof (AREA)
• Specific Conveyance Elements (AREA)
• Manipulator (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Stackable Containers (AREA)
• Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
• Stacking Of Articles And Auxiliary Devices (AREA)
• Pallets (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9370028

Family Applications (1)

Country Status (12)

Cited By (1)

Families Citing this family (13)

Citations (4)

Family Cites Families (6)

• 1988
  • 1988-09-15 FR FR8812053A patent/FR2636324A1/fr active Granted
• 1989
  • 1989-09-13 US US07/406,451 patent/US5030059A/en not_active Expired - Fee Related
  • 1989-09-14 JP JP1240473A patent/JPH02107535A/ja active Pending
  • 1989-09-14 PT PT91724A patent/PT91724B/pt not_active IP Right Cessation
  • 1989-09-14 CA CA000611448A patent/CA1321801C/fr not_active Expired - Fee Related
  • 1989-09-15 ES ES198989402531T patent/ES2030585T3/es not_active Expired - Lifetime
  • 1989-09-15 EP EP89402531A patent/EP0359671B1/fr not_active Expired - Lifetime
  • 1989-09-15 KR KR1019900701010A patent/KR900701635A/ko not_active Withdrawn
  • 1989-09-15 AT AT89402531T patent/ATE73414T1/de not_active IP Right Cessation
  • 1989-09-15 WO PCT/FR1989/000471 patent/WO1990002697A1/fr unknown
  • 1989-09-15 DE DE8989402531T patent/DE68900970D1/de not_active Expired - Fee Related
• 1992
  • 1992-06-02 GR GR920401130T patent/GR3004779T3/el unknown

Patent Citations (4)

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