FR2485408A1 - - Google Patents

Abstract

DEVICE FOR MANUFACTURING TUBULAR CALIPERS WITH SEVERAL HOLES, IN PARTICULAR INTENDED TO CONSTITUTE TUBULAR CHASSIS ELEMENTS FOR CAMPING FURNITURE. ON A HORIZONTAL SUPPORT RAIL 2, CARRIED BY THE FEET 1, 1 OF THE MACHINE FRAME, ARE MOUNTED, SLIDING AND ADJUSTABLE, DRILLING TOOLS 3, 3, 3 WHICH VERTICALLY DRILL THE TUBES 6. AT THE ENDS OF THE RAIL 2 ARE MOUNTED TWO SLIDES 8 AND 8 WHICH CARRY CHUCKS 10 AND 10 INTRODUCED IN THE ENDS OF THE TUBE AND THE PERFORATION ASSEMBLIES 11, 11 THROUGH AND IMMOBILIZING THIS TUBE. THE TEST IS THEN CARRIED OUT.

Description

Method and device for manufacturing tubular stirrups pierced from

  several holes The present invention relates to a device for manufacturing tubular stirrups pierced with several holes, intended in particular for bending and drilling

several holes in the tubular chassis parts intended

  born to furniture. For seats and beds, especially those used to sit or lie down during leisure time, camping for example, it is necessary, because of this area of use, to keep a large

  light weight to the elements of which they are made.

Added to this is the need to find solutions to fold the furniture when changing place of use and store it without needing

a lot of room.

To achieve such a result, practice has

established to make the chassis parts of such furniture

  steel tubes or metal tubes.

  It is not one of the least advantages that, thanks to the introduction of mass production, it has been possible to obtain an economical manufacturing method, which has enabled a wide distribution of such seats or furniture.

  sleeping bags intended in particular for the law-

sirs.

  In the usual method, we carry out on ma-

special chines the different works and shaping operations. In the manufacturing units used so far, these are mostly machines that serve only one purpose and in the

  implementation of which the usage times pro-

mentioned above are less than the set-up times

required in each case.

  We know some working machines and devices

  automatically in which the different shaping operations take place in a chain on a single machine. On a known special machine, the straight tube section is firstly bent or bent, then the tubular arch is provided with perforations at the various locations where they are provided. This machine is well suited for the manufacture of well-defined tubular stirrups; but the perforation diagram, that is to say the way in which the drilling locations are arranged, cannot be modified or

good can only be so at the cost of disproportionate work

  tionné. The object of the present invention is, therefore, to provide a device for manufacturing tubular stirrups pierced with several holes which is constituted such that this device, while having

as small a footprint as possible, can run

ter all the necessary work phases without it

there should be provision for transfer operations,

teuses in time, the possibility of adjustment in position

  tools being very much desired.

The solution to this problem is provided, according to the

vention, by a device of the type described in the preamble which is characterized in that mandrels can be

  introduced into the ends of recessed tube sections

cut tilines, fed one by one in a clocked fashion, are put in place; in that are arranged, isolated or

  in groups, so as to act on said sections of tu-

bes, piercing assemblies which can pierce a hole in said tubes and perforating assemblies which can pierce through them, which are arranged with respect to the sections of tubes in a drilling position chosen beforehand; in that it is provided, offset in height, two or a greater number of bending mechanisms which can act horizontally or in an inclined position on the section of tube previously perforated which is brought to them from the drilling station

and in what are associated with these different elements

  devices, devices intended to ensure in a timed manner the transfer of the perforated tube section and / or

  of the tubular stirrup after bending.

  A device made in this way is capable,

after taking over the straight tube sections

cut lines, fed one by one in a clocked fashion, to carry out both bending and all operations

drilling.

  Contrary to the opinion which has hitherto prevailed among specialists, it is now proposed to first of all provide the tube section with all the necessary holes and perforations and to only bend afterwards, after drilling, the section

of straight tube in the same machine. Whatever the name-

  bre of holes and their type is a data depending on the article, it results however, in the case where it

  a suitable positioning of the premises must be carried out

drilling cements, a considerable saving on

  total shaping time. The use of such a machine

is certainly not limited only to manufacturing

  tubular stirrups, but this machine is particularly

  well suited to the manufacture of tubular stirrups

drilled with several holes.

The device according to the invention for manufacturing tubular chassis parts for furniture has a

great interest in industrial manufacturing workshops

  trielle of seats and beds for the furniture industry

  wheat used in leisure time.

In this respect, the design of the proposed device corresponds to market requirements insofar as the drilling scheme can be chosen beforehand and be modified without causing work or considerable expense after the execution of certain series. The drilling assemblies to be positioned on a main support rail can slide by their bearing surface and are mechanically immobilized on the main support rail according to the drilling scheme adopted in

each case.

  According to a complement to the embodiment, it l; it is proposed that the perforation assemblies right through, acting roughly horizontally in the end part of the section of the tube, are mounted so that they can slide in the same quantity as the mandrels which can be slid into the ends of said section and that punches are provided,

intended to pierce the tube on each side, which crosses

  smells right through and across the mandrels, while the rods of said punch punches, when the punches are in the perforation position, serve as a means of immobilizing the tube allowing the punches to act, almost vertically

of simple drilling.

In the device according to the invention, it is further provided that two or more cylinders are arranged so as to act on the linkage of the transfer mechanism so that the transfer path of the perforated tube is defined by small displacements

obliquely and in height of the drilling station with respect to

  port at the folding station and by the intro management

  duction in open profiles of cin segments

  trage of the bending device which have been shifted

  by rotation in an appropriate manner.

  It must be considered of particular importance

completely relative to the device according to the invention

  the fact that the axes of the shafts of the hinge segments

  ge are arranged so as to move away from the verti-

  hold backwards up to 45. In this way, once the bending bowls are pivoted in the direction of their release and after loosening the clamping jaws, the bent tubular stirrup, the drilling of which is finished, can, using ejection devices actuated by

a spring, be ejected according to cadence signals

  cement emitted by measuring fingers exploring the pro-

  bending gram and transferred to one or more stirrup evacuation rails in the hanging position.

  Other features and advantages of the invention

  tion will emerge from the description of one of its modes

  of realization, given here by way of illustration but null-

limitative, which will be made below with the aid of the appended figures which represent: FIG. 1, a front view of a device according to the invention, FIG. 2, a section along line II-II of FIG. 1, the device being in the position: section of perforated tube, all drilling punches retracted or raised, transfer device in the hanging position, FIG. 3, a detail of the section along line III-III of FIG. 1, with however the punctures puncture right through still in the puncture position, FIG. 4, a section along the line IV-IV of FIG. 1, the drilling punches still in the drilling position, fig. 5, a section along line V-V of the

fig. 1, the bending of the tubular stirrup being completed

born and the bending bowl still resting, fig. 6, a section along line VI-VI of FIG. 1, performed when the stirrup is bent

  and released but has not yet been deported.

Fig. 1 shows a front view of the device.

  The front feet 1, 1 ', slightly inclined towards the rear of the frame of the machine, carry, in their middle part, the main support rail 2 which

is rigidly fixed in a horizontal position.

  On this main support rail are the drilling assemblies 3.3 ′, 3 "... which are movable by sliding and which are immobilized in the

  drilling position previously selected. These sets

drilling holes 3 are arranged with their surfaces

  support 4 resting on the main support rail 2.

  The drilling assemblies act vertically with their punches of p (%!, - vge 5, 5 ', 5 ".. on the section of tube 6 placed horizontally, which, during the drilling operation, is immobilized in retaining jaws 7, 7 ', 7 "On the two end parts of the main support rail 2, provision is made, mounted so as to be able to move in the longitudinal direction in

sliding through sleeves, two drag-

nales 8 and 8 'which, on the one hand, carry the mandrels 10 and 10' which can be introduced into the ends 9 and 9 'of the tube and which, on the other hand, support the sets il and 11' of perforation on the in part,

acting almost horizontally and being able to

  place with the mandrels sideways and the same

quantity.

The punch punches 12 and 12 'of these sets

perforation bores pierce the front wall and the rear wall of the tube by acting on the tube section 6 in a direction passing through its longitudinal axis. During this operation, the transverse hole 13, drilled in the mancrin 10 introduced

  in the guide tube for the punch

  tion. This can be seen in the detail shown in fig. 3. The two perforating punches 12 and 12 'piercing right through the tube section on the end portions thereof remain in their final position and, by their rods, immobilize the tube section while the piercing punches 5, 5, 5 "offset by about 90, that is to say drilling a hole almost vertically in the tube. During this drilling of several holes, the section of tube 6 is

held in retaining jaws 7, 7 ', 7 "...

  adjusted to the diameter of the tube as we can

see in fig. 4. After retraction of the pointer group

  ices piercers 5 and two punches punches 12, the section of tube whose drilling is completed is gripped by the gripper 15 of the transfer device 14. To facilitate understanding, this

is shown in fig. 2.

  In fig. 2, we can also see that at the time

  o they are ready to receive the pipe section rec-

perforated line 6 ', the bending segments 19 of the bending mechanism 17 are in a pivoted position in which a profile 20 is not turned towards

the tube section only by its upper shoulder.

The lower shoulder of the profile is cleared to allow

put the insertion of the tube section. The bowls

bending 21 are spaced apart by pivoting.

  During shaping, the clamping jaws 22 act in the middle part and immobilize the section of perforated tube 6 ', so that the gripping device 15 can be brought back under the action of a jack 16. After the device gripper 15 has been brought back, the bending cups 21 can move towards the middle of the segment

and, in combination with the shaped shaped part -

  of the bending segment 19, surround the inner branch

rewired from the section of tube 6 '. It is in this respect easy to realize that before the beginning of the bending operation, the bending segments 19 have made a pivoting such as is presented to the section of tube 6 ′ to bend a complete profile comprising shoulders

on each side.

  In fig. 5 is shown a section along the line V-V of FIG. 1. The situation represented here is that which exists after bending the two branches of the tube section to constitute the tubular stirrup 23,

the bending cups 21 still being applied.

  Then, the bowls 21 move apart by lifting from the stirrup 23. The clamping jaws 22, holding in the middle the tube section 6 ′ before and during the bending operation, then loosen their clamping force and ejector devices 25, generally acting by the pressure of a spring, push - 8 downwards in an oblique direction the tubular stirrup 23 whose bending is finished so that this stirrup can be picked up by the rail 24 for evacuating

  stirrups and routed to a store.

  This situation is visible on the detail of the

  fig. 6 corresponding to section VI-VI of FIG. 1.

  Finally, it should be added that putting into action the provisions

sitives ejectors 25 is performed in a synchronized manner in synchronization with the actuation of the cleats

  26 allowing the tube sections to be released one by one.

  By maneuvering these cleats, we feed in a ca-

dencée the device in straight tube sections

separated from each other and brought one by one.

j

Claims (15)

REVENDI CATIONS 1.- Device for manufacturing tubular stirrups pierced with several holes, intended in particular for bending and piercing with several holes tubular frame parts intended for furniture, which device is characterized in that mandrels (10) can be introduced into the ends of sections of straight cut tubes (6), fed one by one in a clocked fashion, are put in place; in that are arranged, isolated or in groups, so as to act on said sections of tubes (6), piercing assemblies (3) which can pierce a hole in said tubes and perforator assemblies (11) which can pierce them right through part, which are arranged relative to the tube sections (6) in a drilling position previously selected; as provided, offset in height, two or more bending mechanisms (17) which can act horizontally or in a   inclined position on the tube section (6 ') before   loosely perforated which is brought to them from the drilling station; and in what are associated with these different   constituent elements of the devices intended for   transfer the transfer of the perforated tube section (6 ') and / or the tubular stirrup (23) after bending.   2.- Device according to claim 1, character- laughed in that the drilling assemblies (3, 3 ', 3 "...) to be positioned in the position previously chosen for drilling can be moved by sliding of their bearing surface (4) on one or more rails-   supports (2) and are mechanically immobilized on the support rail (2) according to the drilling pattern adopted in each case.   3.- Device according to any one of the res- dications 1 and 2, characterized in that it is intended that the surface of the main support rail (2) is certainly parallel to the axis of the tube section and that the drilling direction of the group of drilling punches (5) deviates from the vertical by an angle up to while the shaft (18) of the bending device (17) is arranged with an inclination towards the rear with respect to the vertical up to 45a.   4.- Device according to claim 3, charac-   terized in that the sets (11) of perforation right through acting almost horizontally in the end part of the tube section are mounted so that they can slide in the same quantity as the mandrels (10 and 10 ') which can be slid into the ends of said section and in that there are provided punches punches (12 and 12 '), intended to pierce the tube on each side, which go right through the mandrels (10 and 10 '). 5.- Device according to claim 4, character-   risé in that for the punches of perforation right through (acting almost vertically, it is provided that the rods of the punches, when these are in the perforation position in the end part of the section tube (6), serve   tube immobilizer.   6.- Device according to any one of the res-   dications 1 to 5, characterized in that a hy- hydraulics intended both for several drilling assemblies (3), which can move on the main support rail (2) but immobilized when they are in   action, that also to different sets of per-   drilling through and through (12) independent, immobi- read in other positions, can be powered   at different pressures by a pressurized fluid. 7.- Device according to any one of the res- dications 1 to 6, characterized in that the groups of drilling punches (5) are arranged so that they can be controlled in order to perform a simultaneous drilling but, however, offset in time with respect to the perforation punches from side to side 1 1 (12), considered individually or in groups. 8.- Device according to any one of   Claims 1 to 7, characterized in that a device transfer tif (14) acts on the section of tube (6 ') previously perforated so that the section of tube, placed in the pivoted position provided with respect to the bending segments (19) acting   on it, can be transferred to the bending station available dried with an offset in height. 9.- Device according to any one of the res- dications i to 8, characterized in that two or more cylinders (16) with push pistons are arranged so that they can act on the linkage of the transfer mechanism (14) so that the path of   transfer is defined by small shifts in in-   tilt, in height and in the direction of insertion into the bending segments (19) of the bending device (17), segments which have been pivoted   and have open profiles (20).   10.- Device according to claim 9, character-   laughed in that, with regard to the transfer mechanism, at least one gripping member (15) is equipped with a finger which, during the transfer operation, keeps the position of the tube section (6 'fixed) ) until clamping jaws (22) provided at the bending station have gripped the tube section (6 '). 11.- Device according to any one of the re-   vendications 1 to 10, characterized in that there are provided clamping jaws (22) acting roughly in the middle of it on the section of tube (6 ') previously perforated in the bending position and in that are associated with the bending segments (19, 19 '), in which the tube section (6') rests, cups (21, 21 ') gripping the tube section (6') to ensure its bending. 248540O - 12   12.- Device according to claim 11, charac-   characterized in that the axes (18) of the shafts of the bending segments (19) are arranged so as to move apart   from the vertical at an angle of up to 450. 13.- Device according to any one of claims 1 to 12, characterized in that there are provided ejector devices (25) actuated by a spring, which act on the tubular stirrup (23) previously shaped and which operate according to timing signals, measuring fingers exploring the bending program and one or more rails (24) for removing the stirrups being placed in the hooking position.   14.- Device according to claim 13, charac-   terized in that one-by-one separation tabs (26) of the tube sections, which tabs release the straight section of tube (6) from a supply rail at the drilling station, are arranged so as to act as a clocked way synchronized with the devices ejectors (25).   15.- Method for manufacturing sections of bent and perforated tube, intended in particular for bending and drilling tubular pieces of furniture frames,   characterized in that straight tube sections (6)   lines fed one by one in a clocked fashion, with mandrels (10) inserted on each side in their two ends, are pierced right through by punching punches (12) and in that the rods of said puncturing punches (12 ) act to secure the asset, while a group drilling punches (3) located in a position   previously chosen drilling action act ver- tically on the tube section (6), in that after retraction of the punches, a transfer device (14) brings the tube section (6 ') to bending segments (19) located in a position where these segments are likely to receive it, as a result of which bending bowls (21) grip the branches of the tlue section (6 ') and in combination with the bending segments (19) form the stirrup   and in that finally, after release of the tubular stirrups   slides (23) and loosening of the clamping jaws (22), of the ejector devices (25), actuated by springs, bring the tubular stirrup (23) to the rail (24) of evacuation tion of stirrups.