FI56347C - SAETTING THE PROCEDURE FOR FRAMSTAELLNING AV SPIKBAND AVSEDDA ATT ANVAENDAS I SPIKINDRIVNINGSAPPARATER - Google Patents

Description

HV - »-— TM r-, ANNOUNCEMENT

(11) UTLÄGGNINGSSKRIFT S6347 C (45) Pointti nyor.rctty 10 Cl 1930 Patent ceddelat ^ (51) Kv.lk. * / Lnt.CI. * B 65 B 15/0 ^ SUOMI FINLAND (21) Pt * nttlh.k * mu * - Pttmtantttkning 3056/72 (22) Htkemlipllvl - An * öknlnj.d »j 02.11.72 ^ 0 (23) Alkuptlvl - Glitlgh.ud.j 02.11.72 (41) Tullut | ulkl $« kil - Bllvlt offantllf 03.05.7l

Patent, and the Board of Registration (NlhUvik.ip.non I. heard | uilai.un date -

Patent · och registerstyrelsen Amekmn uttagd och uti. * KrMt * n public.nd 2o. 09.79 (32) (33) (31) Requested «tuolkeus— Begird prlorltet (71) Helsingborgs Spikfabriks AB, Svanhalsgatan, 252 59 Helsingborg,

Sweden-Sweden (SE) (72) Claes Göran Staffan Andersson, Rää, Hans-Äke Christian Gram, Helsingborg, Claes Otto Sigfrid Danielson, Malmö, Sweden-Sweden (SE) (7 * 0 Oy Kolster Ab (5I +) Method and apparatus for the manufacture of nail belts for use in nailers - Sätt och anordning för framställning av spikband avsedda att användas i spikindrivningsapparater

The present invention relates to a method as stated in the preamble of claim 1 for producing a group of nails or similar fastening members spaced apart between tapes of paper or the like glued in the form of a belt.

It is known to use relatively light, usually hydraulically or pneumatically operated hand tools for inserting nails, which are loaded with belt belts as indicated above, i. usually with ribbon belts comprising a row of nails and two paper ribbons glued to both sides thereof · With these paper ribbons, the nails are fastened at regular intervals parallel to each other with their tips pointing in the same direction. In the past, the diameters of the nail bases have been predominant for the smallest distance of the nails in these nail belts, taking into account that the outermost nail of the nail belt must pass freely past the nail adjacent to the nail belt when it is inserted with the tool.

In this device, the nails can be positioned so that the tops of their bases are in the same plane, the arms of the nails being perpendicular to the paper strips glued to each side. This arrangement has shifted the nails obliquely to the paper strips glued on, with the nail bases being placed in separate, parallel and spaced apart planes * A characteristic feature of this arrangement is that the nails of the nails overlap each other in such a way that the strip the base of the nail is bounded at its edge to the arm of the next nail of the belt below the base of this nail, which nail in turn is positioned correspondingly with respect to the next nail, etc. throughout the nail belt. Using this arrangement, the nails can in principle be placed in such a way that the nails have a mutual distance corresponding to the difference in the edge of the nail base from the same nail * The angle between the nails and the length of the adhesive tapes is lit for practical reasons.

It is known to use continuous machines for making such strip belts, which are equipped with a conveying device used to continuously transport the nails from the installation and feeding station to the strip gluing station, where the paper strips are continuously glued to the nails of the nail row fed continuously. From this position, the continuous nail belt thus prepared is transferred past a cooling station where the binder is cured and then to a fault detection and belt cutting station where the fixed length belt pieces are separated from the continuous belt by nails held together by glued tapes, after which the belt pieces are delivered for packaging.

Known machines of this type are very complex and therefore expensive. As a result of the complex construction of the known machines, it is possible to arrange the operation of the workstations in such a way that the entire workflow can be carried out at a steady pace without interference. Of course, if a fault occurs in a drive, this will affect the entire workflow on the machine. Particularly delicate work steps are feeding the nails to the tape gluing station in the exact orientation required for gluing paper strips, and holding the nails simultaneously as they are continuously transported during tape gluing work. Furthermore, the cutting of the continuous webbing to the specified lengths and, in that case, the placement of the broken belts for packaging is a prone to interference.

The object of the invention is to obviate the disadvantages described above by providing a procedure for enabling simple, trouble-free and well-arranged work steps which can be carried out with a continuous, reliable, simple and inexpensive machine.

It is also an object of the invention to make it possible to prefabricate wire belts formed by wire nails (grooved nails) provided with a square part, which has not been possible with previously known machines.

These objects have now been achieved in that the method according to the invention has acquired the features indicated in claim 1.

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The machine according to the invention for carrying out this method has the features set out in claims 2-18.

The invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a highly schematic method of making nail belts according to the invention, Figures 2A-2F all show a plan view of a nail belt machine according to the invention, Figure 3 is a schematic perspective view of Figure 2B. 2B on the line IV-IY and showing the nail dividing and holding wheel and the pressing roller of the gluing station, Fig. 3 shows the gluing station in cross section on the line VV in Fig. 2B, Fig. 6 is a horizontal sectional view on the line VI-VI in Fig. 3, Fig. 7 shows the nail belt Fig. 6 is a side view of the belt receiving and stacking device of Fig. 2F, and Fig. 9 shows the nail belt shortly before dispensing.

In the nail belt machine shown schematically in Fig. 1, nails are fed from a storage 1 of disordered nails. The storage comprises a known , the mutual distance of which corresponds to the diameter or thickness of the nail shank. Nails naulakourua fed along resting on a row when dependent on four positions on the upper side of the trough of the strip gluing station # 3 in which the paper band 6, which is' applied to the two kestomuoviliimajuovaa 7, glued on both sides of the nails in the arms. In this position 3, the nails pass between two wheel and roller devices which feed the nails forward at the correct mutual distance - and in an angular position, and feed the strips 6 to the nails at the pace at which the row of nails passes between the roller devices. Immediately before attaching the adhesive tapes ’: melt the adhesive strips 7 with a heating device Θ. After passing through the nail row, the adhesive tapes are cooled to a solid state by a cooling device 9 · The nail belt 4 'made in the gluing station 3 is to the belt receiving and stacking station 12.

Figures 2A-2F show the above-mentioned workstations in more detail as top views. As mentioned, a vibrating feeder is a device of the known type for feeding nails from an unorganized pile into a circumferential chute 2, 4 which, as shown in Fig. 2A, is connected to a conveying chute 3 comprising two rails 3a. The sock of the invention utilizes gravity and the inclination (adjustable) of the transport chute 3 relative to the horizontal to determine the angle of the nail arms with respect to the plane defined by the nail rows or tips, i.e. in Figure 9 the angle α between the nail arms and the paper strips 6 glued in the gluing position. which are glued parallel to the rails 3a. This simplifies the feeding of the nails in the correct position into the gluing station 3 and allows a simple adjustment of the angle between the arms of the nails and the strips 6 glued on them, so that the chute 3 is pivotally connected to the machine frame at each end.

Fig. 2A shows the magnetic sensor mounted on rails 3 & 13, which senses the presence of nails in the chute from the magnetic path and is arranged with electrical conductors 16 to send a feed pulse to the vibrator 1 if the sensor senses a state where no more nails are fed into the chute below it. The sensor element 17 in the form of a light emitting device is mounted on the rails 3a between your sensor, the suction 13 and the gluing station 3. This sensor 17 is arranged so that it senses with its photocell the height position of the nail bases on the rails 3a. If for some reason the base of one nail rests on the bases of two adjacent nails, this may cause a malfunction in the gluing station. Upon arrival of such a misaligned nail, the sensor sends an electrical signal along electrical lines 18 to a solenoid valve (not shown) which allows air to enter the cylinder 19 to push the piston 19 'between the nails of the nail row 4' as the misplaced nail enters the piston 19 'area. By removing the nails by means of the piston 19 ', the misaligned nail is caused to fall into the correct position. Thus, both devices 17 * 19 automatically correct incorrect positions of the nails as the nails move towards the gluing station 3. Both of these devices 17 * 19 can, of course, be replaced by organs which give a similar result.

The nails are fed to the gluing station 3 in a transport chute as they slide along this frog. This can be arranged so that the chute receives vibration pulses in a separate vibration generator or vibration feeder 1 to facilitate the transport of the nails.

The gluing station 3 comprises as main members two wheels 20,22 rotatably mounted on the machine body 14 (see Figure 3), at least one of which 20 is gear-like with its circumference provided with obliquely cut grooves 21 with a groove spacing corresponding to the distance of the nails 4 to be connected by the strips 6. The angle between the grooves 21 and the longitudinal axis of the wheel 20 corresponds to the angle of inclination of the trough 3. When the nails arrive, the wheels 20, 22 are adapted to capture the nail arms alternately and guide them into the grooves 21 of the rotating wheel 20. The grooves 21 are arranged so that when sliding directly opposite the belt belt 4 they run perpendicularly against the rails 3a to hold the nails in position. The second wheel 22 may have a smooth rim and act as a counter wheel to press the nails into the grooves 21 of the wheel 20 and to keep the nails in the grooves as they pass through the venting station. the loose wheel 20 is adapted to be used in step with the two feed rollers 23, 24 of the feed mechanism 10 to be described later.

Figure 3 shows a grooved nail positioning wheel 20 and a smooth counter-wheel 22 holding a nail 4 & hanging from the chute 3 in a vertical position between two belt press rollers 25, 26 mounted on the body 14 on both sides of the nail track 44 like wheels 20,22.

In Fig. 3, it is assumed that the nails move in the direction of the plane of the paper, which level is indicated by the movement arrows of the wheels 20, 22 and the pressure rollers 25, 26. The nail positioning wheels 20,22 are each mounted on their shafts 27, 2Θ, which concentrically support the belt guide rollers 29 and 30 under the respective wheels 20 and 22, over which the adhesive with the stripe applied outside the paper strip 6 is guided to the nail path (represented by the nail 4a in Fig. 3). 26 through. Each nail 4a, which moves between the nail guide rollers 25, 26 in their grip, is held in the correct position when the pressure rollers 25, 26 press the adhesive tapes 6 against the nail arm. The feeding of the nails and strips 6 by the wheels 20, 22 and the rollers 29, 30 through the venting station is assisted by a feed mechanism 10 which pulls the finished belt forward by means of two traction rollers 23, 24 driven by an electric motor 31 (shown schematically only in Fig. 1) by a chain drive 32 a grooved mounting wheel 20 and a corresponding roller 29 and, if desired, also a smooth mounting wheel 22.

From the belt rolls 39 (Fig. 2C), which rest on the frame, the strips 6 are pulled before the machine is started and inserted between the pull rollers 23, 24 of the feed mechanism 10, as a result of which the nail path can be applied all the way from the feed machine binding 10 to the gluing station 5 * during which two parallel strips of adhesive 7 are applied to each strip by means of a known mucus applicator 36. The adhesive is, as already mentioned, a thermoplastic adhesive which is fed in a molten state through two nozzles arranged for each strip. This device is described in more detail below.

The gluing station 5 comprises a guide member 38 (Fig. 3) already mounted on the frame in an oblique position on the same side of the nail path as the wheel 20 to guide the nails between the mounting wheels 20,22 and the pressure rollers 25, 26 in cooperation with an air jet 39 on the opposite side of the nail path. The blow nozzle 39 is connected to a source of compressed air and directs an air jet towards the nail row and guide member 38 to separate the nail arms so that each can easily fall into its groove 21. The wheel 20 as shown in Fig. 2B comprises a heating device generally indicated at 8 on each side of the nail row 4 .26 a hot air blowing nozzle 40 placed on the inlet side, by means of which the adhesive strips are heated to a suitable space just before they arrive at the attachment point. The cooling device 9 also comprises two blow nozzles 41 which have a position on the outlet side of the pressure rollers 29, 26 for blowing cold air towards the glued paper strips in order to accelerate the solidification of the glue strips.

The smooth mounting wheel 22 rests on the lower end of its shaft 28. Shaft 28 is displaceable toward the nail path by the device shown in Figures 2B and 5. This device comprises a frame 46 movable by two parallel guide rods 45, which supports a bearing housing 26 'in which the shaft 26 is mounted at its upper end.

The frame 46 is spring loaded in the direction of the nail path by two springs 47 around the guide rods 45 · These springs are tensioned between the frame 46 and a rail 48 connected at its ends to two sleeves 49 movable by guide rods 49 * The rail 48 is connected to the frame 46 by nozzles 90 through which it abuts its base formed into a hex nut 91, and is threaded into the threaded hole of the rail 48, the locknut 92 abutting the rail 48 at this point. The rail 48 is further connected to a shaft 93f placed under the screw 90. Displaceably mounted on a support piece 94 connected to the frame 14. a guide roller 99 which engages in an eccentrically positioned slot 98 in a sector-like plate 97 »pivotally mounted on a shaft 98 and controllable by a handle 99 * By turning the plate 97 by a handle 99 the shaft 99 can be moved in one or the other direction already between the guide roller and the slot thus, the frame 48 and the wheel 22 can be quickly retracted to the neutral position with respect to the row of nails to facilitate access in the event of a break in the paper webs or other failures. In the normal working position, the wheel 22 is preloaded by springs 47 on the guide rods 45 in the direction of the groove wheel 20. The spring load can be adjusted with the screw 90 in a manner which is easily apparent from the above.

Fig. 9 shows that the belt guide rollers 29, 50 mounted on the shaft 27 and the separate shaft 28 'of the groove wheel 20 are vertically adjustable to allow the belts 6 and the mutual attachment point 4a to be changed.

For this purpose, the shafts 27 »28 'have parts considerably longer than the width of the guide rollers 29, 50 in the parts above their bearing support columns 60,61 and the guide rollers are movably mounted on the shafts 27» 28'. The shafts and rollers 29 »30 are provided with keyways 62 and connected together by connecting wedges 64 (see Fig. 4), so that in particular the wheel 20 can be quickly changed to one with other grooves 21. To lock the guide rollers to the selected height position, each guide roller has a radial threaded hole. which engages a locking screw 65 inserted inside the hole so as not to damage the paper tape. Both release rollers 25, 26 are mounted on arms 65 (66) pivotally mounted on holders 67, 68 in columns 60, 61, the mandrel also being articulated to a spring loading device including a rod 69 which passes freely through a hole in the retainer 70 in column 60,61 and is adjustable a nut with a combination 71 for changing the tension of the spring 72 tensioned between the holder 70 and the spring support 73 at the end 73 of the rod 7 56347 69 (see Figure 6).

Figure 2C shows the part of the body between the gluing station 5 and the feed mechanism 10, which supports the glue applicator 36 and the electric drive motor 60 for driving the glue outlet. The electric motor uses a chain drive 81, an adjustment gear 82, and a chain drive 83 to pull the feed 84 to pull the solid thermoplastic tape out of stock.

The adhesive applicator 36 is a known device. A more detailed description of the device in question may therefore not be necessary, but it may be mentioned that it includes a heating cabinet 88 and a device supporting a roll of plastic adhesive tape in a solid state. This strip is pulled from a roll from the drive 80-83 into the duct of the heating cabinet, where the strip is melted from one or more, so-called by the heat of the electrical elements in the form of the heat cartridges 89. The molten plastic adhesive is passed through distribution channels 90 to two double nozzles 91 »each supplying two parallel lines of liquid plastic adhesive 7 (see Figure 3) to each paper strip 6 at the point where it is drawn. from a roll of paper tape 33 * When pulling the tape, the from the roller 33 it is turned at 6 ', after which it runs over the guide roller 92 (Fig. 2B) to the corresponding guide roller 29 or 30 under the wheel 20 or 22, so that the glue lines turn towards the nail conveyor track when entering the gluing station 3. Glue melting can be adjusted with thermostat 93 ·

The entire adhesive applicator 36 is movably suspended from the frame by double-acting cylinders 93 to stop the supply of glue.

Figures 2D and 7 show a feeding mechanism 10 for feeding a nail belt 4 'made in a gluing station 3. The feed mechanism comprises said traction rollers 23 »24» bounded by a nail belt 4 'and driven by an electric motor 31, an adjustable gearbox 100 with a slide switch and a chain drive 101, which may be part of the chain drive 32 on which the grooved nail positioning wheel 20 is driven.

The drive shafts 102, 103 of the idler rollers are rotatably mounted on the frame but not on their hollow column 104 · Both shafts support the sprocket included in the chain drive 101 at its lower end projecting from the frame. In the embodiment shown, the second traction roller 24 is not mounted directly on the main drive shaft, but is instead attached to the lower end of the vertical shaft 103. This shaft is mounted in a bearing housing 106 supported by a horizontal arm 107. This arm is pivotally mounted on a bearing housing 108 at the upper end of the main shaft 102 in a manner clearly shown in Figures 2D and 7 «so that it can be pivoted towards and away from the nail path 4 '. The arm is further connected by a rod member 109 to a tension spring 110 connected to a lever device 111 by which the spring can be relaxed to move the traction roller. The spring tension is adjustable by a helical spindle and adjusting nut device 112. The driving force is transmitted from the main shaft to the traction roller 24 by a sprocket 114 below the bearing housing, a short chain 115 and a sprocket 116 on the shaft 105 supported by the shaft. around the centerline, the chain tension does not change when the arm position is changed.

If deemed suitable or desirable, the second main shaft and the corresponding traction roller 23 can be mounted in the same way on the frame. In the embodiment shown, it is not only possible to adjust the compression of the second traction roller, but also to completely turn this traction roller to allow access to the nail track area * However, in the illustrated application, the center of the traction rollers Inn is chosen to secure or facilitate the nail track.

Figure 2E shows a belt cutting device comprising a knife blade 120 mounted on one side of a nail track in the body 14 and a guide 121 mounted on the opposite side of the nail track with a slit containing the knife blade 120 'at its end. The knife blade 120 'is movable toward the nail path by a pneumatic cylinder 122 mounted on a holder in the body and connected to a solenoid valve 123 * electrically connected to a counter 124 and thereby to a photocell device 125 · The photocell device senses the arrival of the nail belt an impulse counter, which then receives a pulse from each nail that bypasses the photocell device. After a certain number of pulses corresponding to the desired nail number, the calculator sends a pulse to the solenol valve, whereby the cylinder 122 is used to break the belt. The cutting takes place with a short delay or with such a timing of the pulse coming from the calculator that the knife blade always cuts across the belt between two nails.

With a simple setting of the calculator, the cutting device can be adjusted to different nail belt lengths and nail sizes.

From the cutting device of Fig. 2E, the nail belt is fed to the belt trapping and stacking station 12 shown in Fig. 2F. to capture when these arrive at this station 12 and are released from the trough between the two magnets. The magnets rest on arms 132 connected to a pivot mechanism operated by two pairs of double acting cylinders 133 * 134 via a lever system. Cylinders 133 »134 operate in conjunction with and with the fifth cylinder 136 in the following manner.

The last part 3 'of the transport chute (see Fig. 8) is separated from the rest of the chute 3 and comprises two short rails 3s * suspended at the end of its own connecting arm 140. The connecting arm 140 rests on the frame and is connected to a double-dust cylinder 136, by means of which the connecting arm can be guided to separate and rail the rails 3a '. The cylinder is controlled by an eolenoid valve (not shown) electrically connected to the limit switch 143.

When the nail belt 4 "arrives at the limit switch 143, it sends an opening pulse via a solenoid valve to a cylinder 136 which, via a connecting arm 140, separates the discs 3a '. The switch 143 is set so that each time the nail belt 4' magnetizes it a second magnet 13a and every other time a magnet 131b for capturing the falling nail belt 4 "when the rails 3a 'are opened.

The magnet that is magnetized and captures the nail belt is then turned downward by activating one of the cylinders 133 shown in Figures 2F and 8, thereby turning down the magnet support arm 132 through the lever 135. Thus, the second cylinder 134 and. this rotates the support arm of the magnet 90 ° through the crank arm system shown at 144, using a limit switch 145, which shuts off the current to the operating magnet 131a or 131b. In this way, the nail belts are lowered onto the cardboard placed under the described turning device, so that every other nail belt is placed when the bases are divided in one direction and every other in the opposite direction, as shown in Fig. 8.

For fault detection, e.g., photocell-type fault detectors can be placed at various locations along the conveyor track. Such a fault detector can be connected to a disconnect device to instruct it to take action to cut off the faulty location. In this case, the limit switch 142 is deactivated.

Figure 9 shows a machine-made nail belt 4n · The angle α between the horizontal plane and the transport chute 3 determines the line perpendicular to the longitudinal direction of the belts 6 and the angle a between the nail arms. By simply changing the inclination of the transport chute 3, this angle α can be adapted to different nailing tools. The trough can be hung at its lower end at 150 in Fig. 8 to be pivoted to the frame 14, whereby the entire trough with its working position 1,5 »10,11,12 can be pivoted around this point. Alternatively, the magazine and trough may be pivotally connected to the body 14 at the upper end for the same purpose. A simple control device 151 can be arranged in connection with the magazine for the angular arrangement of the chute. In addition, it is possible to make the body part pivotable with respect to the base.

It can be seen from the above that the relatively complex work steps can be performed on a relatively simple machine, the operating torques of which are adjusted and are achieved simply by mechanical transmission elements, electronic controls and pneumatic actuators. In particular, the feeding of the nails 11 to the gluing station 5 represents a very great simplification and the same can be said of the gluing station itself with its positioning wheels, the tape guide roller and the tape unwinding roller. In addition, the essential advantage has been achieved that a square nail with a rectangular cross-section as well as a round nail can be recorded with the machine according to the invention and that switching from different nail types and tape sizes to others can be carried out quickly and with simple measures.

The illustrated embodiment of the machine according to the invention can, of course, be modified in various ways within the scope of the idea of the invention.

Claims (1)

A device for producing strip-shaped fastening member packages, the fastening members having a Kurki at one end and a base at the other end, which fasten the arms parallel to the mutually spaced joint strips, the device having an orientation device (1) for arranging the fastening members in vertical positions with the tips pointing downwards, a tape gluing device (5) with a holder for fastening members and weight rollers (10) for connecting the arms to the connecting tapes, a cutting device (11) for cutting the continuously formed strip-shaped package into separate longitudinal sections and guide for fastening members, the rails and the pressure rollers having a word inclination, characterized in that the guide consists of a transport chute (3) which rests on the body (14) along its entire length at a predetermined or adjustable angle of inclination (χ () with respect to the horizontal, and that the chute (3) is adapted to be rotated together with all processing stations (1,0,10,11) or possibly all other positions except one of the two end positions, i.e. with a feed member (1) or a belt capture and weighing station (12) or the latter part.