FR2674452A1 - HAND GUN SHAPED APPARATUS FOR APPLYING BAND AND GLUE TO JOINTS FORMED BY COATING PANELS. - Google Patents

Abstract

An apparatus for applying a tape to a joint of covering panels (dry stone wall) characterized according to Figure 1, by a barrel (12) provided with a pistol grip (14) at one end for handling the apparatus, and a head provided with a nozzle (36) removably mounted at the other end of the barrel (12) for directing and distributing glue below a tape (T) brought by rollers supported at the level of the head to the above the glue dispensing nozzle. The glue flows from a reservoir through a barrel and a head nozzle, discharged by a pump mounted on a reservoir containing glue, a trigger (26) on the barrel can stop the pump motor by means of electrical means and simultaneously close a valve to prevent unwanted additional flow of glue from the barrel or nozzle. The invention is used in the building industry.

Description

OBJECT OF THE INVENTION This invention relates to a portable apparatus

  intended to apply a band and glue on the joints

  formed by cladding panels.

Description of the Prior Art

  U.S. Patent No. 4,080,914 discloses an apparatus for applying tape and glue to joints formed of

coating to assemble them.

  A large and unwieldy tube is filled with glue or Q of coating Traction rollers or drive rollers are mounted on the front end of the tube or "bazooka" and moved along the joint formed by facing panels The rollers are used to drive a drum on which is wound a cable The X 5 "cable is attached to a piston in the elongated tube or" bazooka "which forms a reservoir for the glue or coating While the drive rollers or the traction rollers are moved along the joint formed by the covering panels, the cable is wrapped around the drum, moving the piston to dispense plaster from the front of the tube or "bazooka" at the and below the ribbon driven simultaneously by the drive rollers or rollers

traction on the joint.

2674452 2

  The manipulation of the elongated tube or "bazooka" is not easy and requires the use of both hands by the user or the operator In addition, the tube, when filled with plaster or glue, is extremely resulting in rapid operator fatigue and considerable downtime in

the operation of the device.

  Finally, when the plaster dispensing piston reaches the top of its stroke, it must be refilled with the tube or "bazooka" This causes another delay in the application of the glue or coating together with the ribbon On the seal A malfunction of the device is often caused by the breakage of the cable inside the tube or "bazooka" In this case it results a disassembly and a repair of the demanding 4-stroke device Even if the cable does not does not break, it is not desirable that the piston reaches completely the top of the race without being disconnected at least partially This is because the traction rollers or the drive wheels cause, after their sudden braking, a stop by jerks and a possible detachment of the ribbon that has just been applied and the continuous distribution of plaster or additional glue, resulting in an ugly joint or

  a seal that must be cleaned before the final preparation.

  Apparatus for applying tape and glue to joints formed by coating panels, which is described in US Patent No. 4,090,914, is an apparatus readily used in the commercial application of tape and glue or adhesive. As indicated, this coating has serious drawbacks in its implementation. The apparatus which is the subject of this invention eliminates many shortcomings in

the previous device.

2674452 3

Summary of the invention

  The invention described herein completely eliminates the use of a piston to dispense

  On the contrary, the coating or glue of the apparatus

  _ is discharged directly from a tank through the front part of a gun-shaped apparatus equipped with a handle to hold the apparatus The engine which controls the pump of the coating tank can be started up and stopped by the action of a trigger switch disposed near the handle, the amount of coating or glue that can be

controlled perfectly.

  The device thus becomes light and can be handled easily by placing one hand on the handle and the other near the front of the gun-shaped device to direct it along the joint formed of panels of coating This eliminates the fatigue factor and also reduces the number of parts used in the prior device.

Brief description of the figures

  Other advantages of the invention will be better understood

  in the description and the claims that follow,

  and the accompanying drawing, in which: FIG. 1 is a perspective view of the grip pistol apparatus of the present invention with the rear portion carrying the coil of the seal tape removed; FIG. 2 is a side elevational view of the rear part of the apparatus shown in FIG. 1, showing the assembly of the seal strip at the rear of the apparatus,

2674452 4

  FIG. 3 is a perspective view of the apparatus shown in FIG. 1, seen from the front of the apparatus of FIG. 1, FIG. 4 is a partial perspective view of the front portion S of FIG. handle-shaped housing of the apparatus shown in Figure 3, provided with a support for receiving the dispensing nozzle of the coating and the portion applying the ribbon of the apparatus, Figure 5 is a view Partial perspective view of the rear portion of the plaster dispensing nozzle and the ribbon applying portion of the apparatus of Figure 3, Figure 6 is a longitudinal section of the apparatus shown in Figure 1. and Fig. 7 is a schematic perspective view illustrating the operation of the cutting system and ribbon supply members mounted on the plaster dispensing nozzle and the applicator portion of the dispenser ribbon.

  the apparatus shown in FIG.

  Detailed description of the preferred embodiment

  Referring now in detail to the figures, in which the same references indicate identical elements in several views, FIGS. 1 and 3 show an apparatus (the Omuni of a hollow barrel 12) ending in a pistol with a handle (14). extending downwards The barrel F) comprises a hollow compartment L 16) separated by a wall 818) from a second hollow compartment (20) which extends into the pistol grip (14) The pistol grip 4) and the barrel L 12 \ of the apparatus (i O) can be

  executed in a light metal such as aluminum.

2674452 5

  The compartment & 6) is adapted to receive plaster or glue for adhering a ribbon to a joint between adjacent cladding panels. The compartment (16) comprises a portion (22) of reduced diameter extending towards the _ bottom that is frictionally engaged within a rubber hose (24) The hose (24) may be connected to a pump housed on or within a reservoir containing coating (not shown) , the pump being controlled by an electric motor The pump delivers the glue or coating to O through the pipe (24) the tubular extension (22) of the compartment (16 and in the compartment (16) to

filling of the latter.

  A downwardly extending trigger (26) slides in a slot or horizontal opening (29) in the barrel 2) along the bottom of the compartment 20) and is connected at its front end by a rod L 28) extending through the wall (18) to a valve mechanism generally bearing the mark 30) which is disposed inside the compartment (16 opens and closes an opening L 3 formed in the front wall 131 of the compartment 16) so that the coating or adhesive can be conveyed through the opening L 32) to a dispensing nozzle and a support or a tape application head generally bearing the mark L 36) 110 J The head (36) comprises a circular compartment (38) in communication with the compartment L 16) through the opening (32) and a contiguous concentric opening Q 40) formed in the rear wall L 31 adjacent to the wall C 34) of the compartment 19 in the cylinder (12) 30 of the valve mechanism S 30) or the glue _ flows from the compartment 16 through the opening 2) the opening 40) contiguous in the compartment (38) and then through the nozzle

2674452 6

  distribution (5c provided with a contiguous passage (42) between the front end of the compartment 38) and a dispensing opening 18) at the front end of the nozzle 505 A cylindrical ball valve 44) is rotatably mounted by a shaft (5 l in a recess or a corresponding cylindrical recess formed in the body 46) of the nozzle L 50) between side plates 124 The body 46) can be rotated manually by a lever 49) located at one end of the shaft (51) to open or block the opening 42 J The coating Ao flows through the opening 42) contiguous to the opening L 4 q in the ball valve Q 44) and comes out in the front part of the nozzle (50) through the opening C 118) below a pair of ribbon application rollers L 52) separated by a corrugated central disk 54) adapted to contact and support the portion

  _ central with a length of a T-joint tape described below

  after. A traction roller or a metal drive roller L 59) which is provided at its periphery with teeth 58 J is immediately adjacent to each side of one of the rollers C 52. The teeth (15 are designed to contact the ribbon T and increase the traction between the ribbon and the cladding panel The traction rollers or the drive rollers 56) are fixed on a shaft L 60) together with rollers 52) and a disk L 56 ts-_ Trigger (26 is attached to the rod (28) at its ends The right end of the rod L 28) has a helical spring (62) disposed proximally extending between the upper portion of the trigger (26) and the wall rear of the cylinder (12 on a length not supported by the rod C 28) After a backward movement of the trigger (26) or to the right in the horizontal slot (29) as can be seen from

2674452 7

  6, the coil spring 62 will be compressed against the inner wall of the barrel (12 and serve to return the trigger to its extreme forward position in the slot 29) after releasing the trigger 6) The front end of the rod (28 'is provided with a thread indicated by the mark 4) and receives a cap or a nut 66) serving as a valve normally housed inside the opening 32) in the wall 34) to close it. a rubber thread C 68) having a circular portion 7O and a portion 72) of reduced diameter 4 o extending forward is disposed between the threaded portion 641 of the rod 28) and the wall 18) between the chambers e 16) and 20) of the cylinder 12) By actuating the trigger P 6 against the force of the spring (62 towards the rear of the slot 29), the portion 72) of reduced diameter of the rubber grommet (30) will sag inwardly into the flexible portion 70J of larger diameter of the grommet L 68) allowing the rod (28) carrying the nut 166) to move to the right as shown in Figure 6, thus establishing a communication between the opening 32) and the opening (40) in the compartment t 38> so that the coating can be discharged through the cylindrical neck (22) in the compartment 11 through the openings (32) and (40 in the compartment (38) where it can enter the nozzle 50) through the passage & 2) the central opening 48) in the ball valve L 44), if open, to be distributed below the rollers 5 and pull rollers (56) through the dispensing opening 18) in the nozzle. trigger L 26 / allows the spring (62) to return the rod (28) to the left as shown in Figure 6, so that the nut C 66) is housed again in the opening (32)

  to prevent further distribution of plaster.

2674452 8

  The upper portion of the trigger 26) comprises a vertical sliding contact member (74) connected by an electric wire (76) to the motor of the pump. Another wire (78) is connected to a copper strip (80) mounted on a support 82) _ disposed inside the compartment (20) of the cylinder (12) In the rest position and in the position, where the nut (66) is housed inside the opening (3, 1). contact member 574) at the top of the trigger (26) is in abutting contact with a ceramic plate (84) or non-conductive material on the support L 82 at the front of the copper strip 80 ) As soon as the valve (30), caused by the sliding of the tiget 28) to the right as shown in FIG. 6, opens, the contact member 74) will come into sliding contact with the copper strip t 80) when the housing or the opening 4 i _ (32) is not plugged or closed by the nut (66) allowing the establishment of an electrical circuit for the engine control of the pump by the wire 78> the copper strip L 80 the contact member (74) and the wire 76) so that the pump is only operative when the opening L 32) is uncovered and the valve 30) open The distribution of the coating or glue from the nozzles 50) is thus precisely controlled by the opening (1181 below the ribbon T which

  is applied to the joint formed of cladding panels.

  The head (36 is fixed to the barrel (12) by a support

  shown in Figures 4 and 5.

  A substantially U-shaped support (86) in a plan elevation is mounted on the wall (34) of the cylinder (12). The carrier 86) comprises a pair of legs 88; L 90) mounted spaced from the front wall L 34) of the cylinder C 12) by branches (92) and (94) A portion C 96) in the form of a handle of a support

2674452 9

  (86 connects the branches (88 90) A threaded stud (98 extends outwardly from the loop C 96) The rear wall (39) of the compartment (38) of the head (36) comprises a plate 100) provided with ears 102) extending laterally, designed to be placed behind the branches 88) O 0) of the support @ 6) abutting against the wall (34) Cleats 104), 106) extending downwardly on the rear wall L 39) surround the pin 98) and a nut L 108) blocks the plate 100) on the support (86) with the opening (40 -e finding O _ in alignment with the nut (86) on the valve mechanism L 30) This arrangement makes it possible to adapt other tools to the barrel (12) which are not part of this invention, such as, for example, a tool intended to apply the coating or glue on a corner joint consisting of a pair of A 4 _ cladding panels arranged at right angles to each other to cover the joint, the joint being first covered with a band using a corner pebble such

  than the roller (177) which will be described below.

  Referring more particularly to Figures 1, 6 and 7, the feeding and cutting members 4 of the strip mounted on the head 36) of the apparatus 10) are presented

very detailed.

  A rectangular tubular housing (141) having a longitudinal slot (142) along its entire length extends through opposing openings in the side plates (124). A piston (143) carrying an angled knife blade (144) is slidably mounted in the tube L 14 1) such that the blade 44) is in the slot (142). The blade extends sufficiently out of the tube to pass through a passage (146) in FIG. 7) through which the conveyed ribbon T passes to the rollers L 52

2674452 10

  Each end of the tube 141) is held against any longitudinal and rotational movement by a U-shaped support C 147) (FIGS. 1 and 3) which is itself fixed by screws on the adjacent side plate (124). 148) extends longitudinally through the tube (141) and the piston (143) said chain being disposed in a transverse slot of the piston to which it is fixed by a block 149) connected to the links of the chain, said block (149) being secured in turn on the front and rear faces of the piston (143) by appropriate fasteners (150). The chain 14 is normally held under the action of a spring in a position in which the blade knife (144) is fully retracted and is not in a blocking position of the passageway 146). This retraction is provided by an elongated tension spring (151 (FIG. 7) which is housed in a tube 152 (FIG. has at its end a ring (153 of to prevent its passage through the tube (152) The tube 52) is fixed by suitable flanges (154) on a side plate L 124) A control cylinder (158) is connected to a source of fluid by a pipe ( 160) and comprises a piston 162) which is attached to the opposite end of the chain 48) The cylinder C 158) is mounted by a transverse steel sheet (161) on a side plate (124) pulleys (163) 164) are rotatably mounted on U-shaped flanges CU 47), the chain E 148)

extending around these pulleys.

  To cut the tape T at the end of a seal, the operator allows liquid to enter through the pipe 60) into the cylinder Q 158) to retract the piston L 162) which thus pulls the chain (148) (ie the action of the spring (151)) until the piston (43) and the blade 144) have passed through the passage t 146) After

2674452 11

  the evacuation of the fluid from the cylinder @ 58) the return spring (151) then pulls the piston and the blade back up to

  the withdrawal position shown in Figure 7.

  After the cutting operation which has just been described, the end of the ribbon is no longer adjacent to the wall in the vicinity of the rollers 52) but is rather adjacent to the tube (141 and the blade 144). In fact, a feeding system is to be provided to bring the end of the ribbon back to the vicinity of the rolls and the seal, thereby preparing the tool for applying the ribbon to a new seal. In the present form of such a ribbon feeder, a suitable frame 166) is secured between side plates <24) where it defines a passagell O (communicating with the passage (146) FIG. bringing the ribbon T in the vicinity of the blade C 144) An articulated rod and guide (167) extends in the longitudinal direction of the tool between parts of the frame C 166) on which is slidably mounted a block ( 168) carrying a> _ pivoting needle (16 W The needle is held in one of its pivoting positions under the action of a flat spring (171) The interaction is such that when the block (168) is rotated around the rod (167), the needle (169) enters the ribbon T, the manual movement of the block forward along the rod (67 to the rollers L 52) resulting in a desired feed position of the ribbon T. The block (168) is not only associated with the needle 169) but also includes a permanent magnet 172 ) whose end is in reciprocal influence with the plate È 161) The magnet (172) is strong enough so that the block (L 68) and the needle 169) are normally in the position

2674452 12

  indicated in the figures The magnet is also strong enough to prevent pivoting of the block 168) around the rod (167) except in response to a cam which will now be described. However, the magnet 172) is sufficiently weak "so that the sheet steel 61) can separate easily from

  the magnet while feeding the ribbon.

  The cam comprises an inclined zone 173) of a lateral plate 24) cooperating with a portion of the block 168) Another cam comprises a U-shaped support 174) (FIGS. 1 and 7) which is fixed to the frame 166) and cooperates with with an inclined lower edge (176 of block C 168) When block 168) reaches the end of its feeding stroke towards rollers 59, edge L 176) passes over the U-shaped support (174) to pivot the block Q 168) around

  the rod 167) until the needle Q 69) comes out of the ribbon.

  This needle lifting interaction continues during the return stroke of the block and the needle away from the rollers until the inclined region (173> engages to pivot the block (168) into the In the opposite direction, b and again urges the needle to penetrate the ribbon The length of the positive supply thus produced is correlated with the distance between the blade of the knife and the rollers, and it is such to bring the end of the ribbon in a position adjacent to the rollers to start applying a ribbon on a new joint It is possible to manually perform the reciprocating movement of the block 168) along the rod (167 A corner or rake roll (177 ) is intended for use during periods when a tape is applied at an angle (in a joint between facing panels at right angles to each other)

2674452 13

  (177% is mounted on a stirrup Q 78) which is pivoted to the side plates 124> The stirrup (178) is fixed on a rotary shaft 179) mounted between the side plates 124) and having at its other end a pulley 18 V. A cable 182) connected at one end to a tension spring (183) and therefore to a side plate (124) (at a U-shaped support) (147). extends around the pulley (181) and also around a pulley (185) mounted on a shaft attached to a lever (84). To move the angle roller (177) into the operative position outwards and over the various rollers L 22) and wheel members 54), L 56 the operator pivots the lever 184) to thereby pull the cable C 182), which causes a rotational movement of the pulley 81) in the opposite direction A- clockwise (Figure 1) This action is done by the caliper L 78) to bring the roller L 177) into operating position After releasing the lever 84) the spring 183)

  returns the roller C 177) to the depicted position.

  During the entire operating life of the apparatus -Z 2 serving to apply a tape to a wall, a portion of the standard nozzle provided with an opening or a passage (1 i is mounted abutting against the end face 116) of the nozzle body (6). 0) The standard nozzle L 50) has a passage (118 which corresponds in cross-sectional shape to the associated passage 42 in the nozzle body 46. The standard nozzle part also has a planar end surface 120 which lies in a plane parallel to that of the tape T when it is fed by the frame (166) and the passage 46 'adjacent to the knife mechanism Moreover, as indicated ( for example) in FIG. 3, the end face 120) is directly opposite but

2674452 14

  slightly spaced from the peripheral areas of the rollers 54) and disquest 56) Thus, as soon as the tape is moved forward beyond the cutting mechanism, to come close to the rollers, its inner surface is coated with glue coming out of the passage ( i 181 This bonded surface immediately engages the bodies L 54) L 56) opposite to the covering panels The glue is thus applied indirectly (by means of the ribbon)

to the cladding panels.

  Due to the operation of the feed needle (169) and associated members, described above, the tape T is brought into the vicinity of the rollers in the absence of any rotation of the pull rollers 66. This occurs after each cutting operation. Thus, when the ribbon is arranged between the rollers and the cladding panels (also located between the protruding toothed edges of the L 56 traction shocks) and the cladding panels) , the apparatus is moved along the wall (eg to print to the disks (56) a rotational movement in the clockwise direction, as shown in Fig. 6), so that there is has a feeding or pulling action, the ribbon being fed from a spool C 200) supported by a spindle between arms (02) 04) fixed to the rear of the barrel 12) An application tensioning roller occupies the distance between the arms (202 204) and rests on the ribbon T during its feeding As soon as this operation starts, the tape is coated with glue by actuation of the trigger 26) The standard part of the nozzle is quickly connected to the end face (116 in the corpse C 4 by a mounting spring 421) U-shaped (Figures 3, 6) whose ends are pivoted to the side plates L 124) The part

2674452 15

  medial or basic spring (121) is snapped into a groove (Figure 6) formed in the inclined outer face k 122) of the nozzle \ 59 When the nozzle is in place the base of the spring (21) engages in two shoulders of the side plates. To mount the standard nozzle part, the spring 121? is pivoted out of the socket with the shoulders, after which the nozzle is in a position in abutment with the end face 1 16) of the body (46) of the head (39 Then, the spring 4 O (121) is forcibly pivoted to snap into the groove in the end face Q 122) This mounting operation is fast and efficient The nozzle is easily deposited by inserting a screwdriver near one side of the nozzle and making take out the base of the spring from his

A 4 <groove.

  When the tool is used for post-application of glue on a tape that has been previously applied to flat parts of the cladding board, the glue initially applied must first be allowed to dry. The standard Xo nozzle is removed quickly and replaced. by a post-application nozzle of the type shown in FIGS. 13 and 14 of US Pat. No. 4,090,914, which does not form part of this invention. A nozzle of this type is mounted using the same

  121), and in the same way as described above.

  However, the shape of the postapplication nozzle is completely different and has an inner wall extending substantially in the longitudinal direction of the tool, and then wraps around the rollers (52). ) so that the glue is applied with the post-application nozzle on the seal in an area closely adjacent to the rollers (52). A post-application nozzle for

2674452 16

  a corner joint can also be mounted on the support (86) (FIG. 4) by replacing the assembly of the head 36). At the end of a daily application operation the walls of the compartments 18) and (38) and the walls of

  various passages are coated with glue residues.

  The member L 138 which is provided with a check valve 139), can

  be connected to a hose and open water supply.

  The water then flows through the nozzle t 138) and the check valve 139) to carefully clean the apparatus which will thus be

  f O ready for use the next day.

  An opposite rotation of the traction rollers (56) and the rollers (52) is counteracted by a ratchet wedge C 105) which is held by a tension spring 07) mounted on the tube 141) between the teeth (58) of the 56) A counterclockwise rotation (in FIG. 6) of the discs Q 56) is counteracted by the compression of the spring (107) in this direction. ) are engaged on the cladding panels and

  turn only in a clockwise direction.

  The lever L 49) connected to the shaft L 5 (l) of the body of the ticket valve 48 may be used to open and partially close the passage (42) to the nozzle (O) to slow down the feed of the valve. coating or glue required simultaneously by feeding the ribbon from the spool

(200)

Claims (7)

  Apparatus for dispensing glue and tape to assemble a panel board joint comprising: (a) a tank compartment adapted to contain glue, (b) a pump for progressively expelling glue from said compartment to apply it to a seal, (c) an elongated hollow barrel with a compartment in communication with said pump, said barrel having a pistol handle extending downward from said barrel to maintain the latter.   (d) a head provided at one end of said barrel compartment for dispensing and directing the glue to a determined location, (e) rotatable tape drive rollers mounted on said head adapted to roll along a joint reaction to the movement of the apparatus for applying a length of tape to the adhesive deposited by said head, and (f) a trigger on said barrel for controlling the operation of said pump to expel glue from said reservoir by said cylinder compartment   and said head below the tape as it is fed.   2 Apparatus according to claim i caraczerise in that the adhesive can flow by means of n reaction passage (40) formed in the head (36) of the gun which communicates with the barrel (i 2), permm: Thus, the glue can flow under the action of a pump of a ball valve.   (44) controlled by a trigger (26).   Apparatus according to claim 1 characterized in that the means for stopping the flow of the glue is a ball valve (44) connected to a gate (26) closing the passage and   l O simultaneously stopping the pump.   Apparatus according to claim 1, characterized in that the means for driving the ribbon is obtained by a device having a frame (166) fixed between side plates (124) defining a passage (110) communicating with another passage (146) allowing bringing the ribbon T close to the blade (144); an articulated and guide rod (167) between the frame portions (166) carrying a sliding block (168) and a pivoting needle (169) which   penetrates the ribbon and drives it through the rollers (57).   Apparatus according to claim 1 characterized in that the means for cutting the tape T after use is obtained by a cylinder (158) receiving a liquid from the pipes (160), the assembly driving a piston (162) and pulling one chain (148) until another piston (143) causes the blade (144) to pass through the passage (146) of   leaving the ribbon and cutting it away from said barrel.   6 Apparatus according to claim i characterized in that the means of making removable the head (36) with the inner end of said passage (118) omunicating with one end of the barrel (12 'is a spring (121) which by its - the nozzle, or head (35), in the stop position, the pivoting of this U-shaped spring (212) engages a groove in the face (1221) and clicks at will.   7 Apparatus according to claim 1 characterized in that t O the removable mounting means is obtained by flanges (150) attached to the rear part of the head and said cylinder (12).