EP0937547A2 - Fastener driving tool - Google Patents

Abstract

The fastening element such as nail or screw is at least partly contained in a sleeve with plate washer. A hammering-in tool is movably mounted on the frame (14,16) along a vertical axis (50). An upright magazine (40) beside the hammering-in tool contains a row of horizontal, superimposed fastening elements pointing in the same direction. The dispenser end (45) of the magazine has a separating unit (41,55) controlled by the hammering-in tool. A transfer unit (70) transfers the separated fastening elements to a container (60) for a fastening element whose lower track-end (67) runs to one side away from the vertical axis. The appliance travels by means of rollers (4,5) on a base plate (1).

Description

The invention relates to a driving device for a head and shaft having fastening element such as a nail or screw, which is preferably in a sleeve with a molded disc or the like is at least partially housed, with a frame on which a driving tool is movably mounted along a vertical driving axis.

The driving tool known from document EP-A-0636754 serves to a nail partially housed in a sleeve in the concrete ceiling of a To drive flat roofs, which with a thick layer of soft Insulating material is covered. While the head of the driven nail in Remains inside of the sleeve, this penetrates only as far into the Insulating material until your widespread head sits on the outside of the insulating mat.

The invention is intended to create a driving device of the type mentioned which is robust and simple in construction and which is light, for example operated by hand.

For this purpose, it is provided according to the invention that in addition to the driving tool upright magazine for receiving a series of essentially the same oriented and horizontally superimposed fasteners is attached, one of the driving tool at the output end of the magazine controlled separation station is provided with a transfer device for the transfer of a single fastener to one with the Driving tool, motion-coupled receptacle for a fastening element, the lower end of the trajectory runs laterally away from the driving axis. According to the invention, the head of the fastener or the The plate under the plate only from the driving axis when that Fastening element in the solid base made of concrete, masonry or wood (Rafters) under the effect of the driving tool has reached so far that it can no longer move sideways.

The recording can therefore in a preferred embodiment of the invention simple, enclosing the head of the fastener or the disk, with a lateral insertion slot for the shaft of the fastener or the sleeve provided swivel plate and is therefore subject to virtually no Wear. The driving tool is advantageously part of an electrical Screwdriver or hammer, which preferably on one along one Vertical rod up and down movable carriage is stored. The up and down Movement of the carriage along the driving axis can according to the invention either by a separate pneumatic or electric motor or, in one simpler version, done manually in such a way that the Manual downward movement of the sled against one that resets the sled Gas pressure spring is being worked.

The inventive, particularly simple singling station on the magazine sees in a preferred embodiment of the invention, a mechanical control on the part of the carriage, being in a first embodiment of the invention during a downstroke the lowest of the stocks Fasteners or sleeves prepared for separation and during the subsequent upstroke is isolated and falls on a ramp. The Ramp as part of the transfer device frames the head of the Fastening element or the plate washer by appropriately shaped Scenes, it turns from a horizontal to a vertical position and passes it at the end of a recording. The aforementioned isolation can be in accordance with the invention particularly simple form can be realized in that the incidence opening Ramp is covered with a deflector at such a distance that only a little is greater than the shaft diameter of the fasteners to be driven or the sleeve, the lower end of the magazine being laterally displaceable. The magazine can be swiveled sideways for this purpose.

In a further embodiment of the invention it is provided that in the Starting position of the sled, i.e. when it is at top dead center the magazine is slightly slanted. When moving the Driving tool is a lever joint biased by springs on which Throw-in elements are arranged, which are prepared to a during the Downward strokes of a fastener or sleeve, to hit the receptacle when the driving tool moves upwards by pressing the Spring tension is released.

The fastener or sleeve rotates in the transfer device automatically by about 90 ° and finds its final position on the Picking up only by knocking in the throw-in elements in front of it Tension of the released lever joint.

If the fasteners according to document EP-A-0626 754 over the most of their length in a plastic sleeve with a wide plate embedded, it is recommended that the down stroke of the slide Driving tool already penetrate far enough into the interior of the sleeve before the recording at the end of its path of movement to the side of the Driving axis is steered away. To support it can be provided that a with the driving tool coupled gripper of the inner contour of the open top Sleeve is adapted so that the gripper surrounding the driving tool in the Retract the inside of the sleeve with a pinch before the receptacle comes out of the driving axis is moved sideways.

Fig. 1

eine schematische Vorderansicht einer handbetriebenen Eintreibvorrichtung;

Fig. 2

eine Seitenansicht der Eintreibvorrichtung nach Fig. 1; wobei ein Teil des Rahmens weggelassen ist;

Fig. 3

eine Ansicht der Vereinzelungsstation aus der Vorrichtung nach Fig. 1;

Figuren 4 und 5:

Einzelheiten aus der Vereinzelungsstation;

Figuren 6 bis 7:

Einzelheiten der Aufnahme;

Fig. 8:

eine weitere Einzelheit aus der Eintreibvorrichtung zur Erläuterung ihres Betriebsverhaltens; und

Fig. 9:

eine Seitenansicht eines Befestigungselements für die Eintreibvorrichtung nach Figuren 1 bis 8.

Fig. 10:

eine weitere Variante der Übergabevorrichtung in schematischer Darstellung

Fig. 11:

eine Ansicht aus der in Figur 10 angedeuteten Richtung "D".

Fig. 12:

eine weitere Ausgestaltung der Aufnahme.

Fig. 13:

das in Fig. 12 mit "A" gekennzeichnete Detail in einer Vergrößerung.

For the rest, further preferred embodiments of the invention are specified in the subclaims. The invention is described below with reference to the embodiment shown in the accompanying drawings. Show it:

Fig. 1

a schematic front view of a hand-operated driving device;

Fig. 2

a side view of the driving device of FIG. 1; part of the frame being omitted;

Fig. 3

a view of the separation station from the device of FIG. 1;

Figures 4 and 5:

Details from the singling station;

Figures 6 to 7:

Details of admission;

Fig. 8:

a further detail from the driving device to explain its operating behavior; and

Fig. 9:

a side view of a fastener for the driving device according to Figures 1 to 8.

Fig. 10:

a further variant of the transfer device in a schematic representation

Fig. 11:

a view from the direction "D" indicated in Figure 10.

Fig. 12:

a further embodiment of the recording.

Fig. 13:

the detail marked "A" in Fig. 12 in an enlargement.

The driving device has a base plate 1 with which it is on the floor can be parked and which runs forward into two arms 2, 3 and back a pair of rollers 4, 5 carries, so that the driving device by tilting backwards can be moved by hand. On the base plate 1 is an upright Frame 10 attached, the two spaced transversely to the direction of travel according to arrow 12 Columns 14, 16 and a connecting the upper free ends of the columns 16, 14 Crosshead 15 has. A carriage 20 is vertical along the columns 14, 16 movable, the two vertically spaced and comprising the columns 14, 16 Struts 21, 23 and one of the two struts 21, 23 in front of the columns 14, 16 connecting support plate 22 has. From the upper strut 21 protrude across Handles 27, 29 spaced apart in the direction of travel, which at their upper ends are each provided with an outwardly projecting handle part 26, 28. The Handles 27, 29 are adjustably attached to the upper strut 21 so that the Handle parts 26, 28 in a comfortable handling position for an operator can be brought.

The lower strut 23 is with the head one on the base plate 1 supporting gas pressure spring 24 connected approximately midway between the two Columns 14, 16 is arranged. The carriage 20 can therefore by manual pressure from above onto the handle parts 26, 28 along the columns 14, 16 against the spring pressure the gas spring 24 can be moved down and returns under the effect the gas pressure spring 24 automatically in its upper rest position shown in FIG. 2 back.

Fixed to two vertically spaced and fixed to the front of the support plate 22 attached tabs 17, 18 is a driving device designated as a whole by 30, that can be an electric screwdriver, attached so that the Direction of advance of the driving tool, not shown, exactly in the Driving axis 50 lies.

The driving tool is surrounded by a telescopic cylinder 35, the the uppermost part 31 is fastened to the lower tab 18, and the lower part 33 thereof is guided in the opening 43 of a horizontal support plate 41, which in Direction of travel protrudes from a guide plate 44 to be explained, and with a plate 32 is completed except for a central opening.

In addition to the telescopic cylinder 35 is on the crosshead 15 to Driving axis 50 articulated essentially parallel magazine 40, for example by a pin, not shown in detail, which consists of a Approach 19 of the crosshead 15 projects transversely to the direction of travel 12 Magazine rear wall 42 passes through, so that the magazine 40 by a horizontal, transverse to the direction of travel 12 extending axis 51 can be pivoted. The Magazine 40 consists of the rear wall 42 adjacent to the telescopic cylinder 35 and two spaced in the direction of travel, vertical and parallel to Rear wall 42 extending rods 46, 48 (Fig .. 5). The rear wall 42 and the two rods 46, 48 rise from a right-angled, up and down open box 45, which is formed at the lower end of the magazine 40. The taken in the direction of travel width of the box 45 is such that the widespread head 102 of a fastener 100 takes place in this place. Of the The distance between the rods 46, 48 is only slightly larger than the width of the shaft 104 a fastener 100.

The guide plate 44 has at its end opposite the base plate 1 the support plate 41 extending at right angles to it in the direction of travel, which is first the circular opening 43 for the passage of the lower part 33 of the telescopic cylinder and next to it has a rectangular cutout 47, in which the box 45 dips with little lateral play. The section 47 is wider than box 45, so that the latter during the mentioned Pivoting movements of the magazine 40 is laterally movable in the cutout 47, remains trapped in this. The support plate 41 is also with a slot 52 provided that out of the cutout 47 opposite the opening 43 leads and has a width which corresponds to the distance between the rods 46, 48, and so is arranged that in the rest position of the box 45 shown in Fig. 5 discharge opening 53 provided on box 45 between rods 46 and 48 continues into slot 52.

On the top of the support plate 41 is a deflecting strip 55 on that of the opening 43 opposite side of the cutout 47 at a height above the surface of the support plate 41 is provided, which is slightly larger than the diameter of the shaft 104 is. As can be seen in particular in FIG. 5, the deflection strip 55 covers in Top view of the support plate 41 the slot 52 and extends over the slot 52 by a distance that is significantly smaller than the freedom of movement of the Box 45 in section 47.

This makes it possible to insert the magzin 40 from its upper open end Head 102 and the shank 104 having fasteners one after the other introduce that the head 102 abuts the rear wall 42 and the shaft 104 itself extends between the rods 46, 48 outwards transversely to the direction of travel. Of those located in the magazine 40 in this way, essentially the same oriented and horizontally superimposed fasteners 100 the bottom fastening element lies with its shaft on the deflector strip 55 on. Is the magazine 40 about the axis 51 in a manner still to be explained Side pivoted so that the box 45 moves in the cutout 47 the bottom fastener on the deflector strip 55 to its free End pushed sideways, falls after reaching the end of the Deflection strip 55 with its shaft 104 on the surface of the support plate 41 and is from the limitation of the discharge opening 53 on the box 45 at Swinging the magazin 40 back over the slot 52, so that isolated fastener then drop down through the slot 52 can.

The lateral pivoting of the magazine 40 is carried out by one (for example provided with a roller, not shown) cam 56 on a to the vertical oblique outer edge of a cam plate 58 which reaches the box 45 is attached upright adjacent to the rear wall 42. The Cam 56 is attached to the holding plate 22 so that when the Carriage 20 contacts the cam 56 with the cam plate 58 and on the called edge expires. As a result, the magazine 40 is pushed in the direction of travel and box 45 within cutout 47 to initiate one Separation postponed. Supplementary serves to safely guide the magazine 40 a groove 80 projecting from the rear wall 42 and into a frame-fixed groove 80 plunging finger 82.

For the defined resetting of the magazine 40 (as far as resetting the same) not already done due to gravity) in the starting position with upwards moving carriage 20 is used on the plate 22 attached, open at the top Trap 59, which from the rear wall 42 protrudes pin 57 and due to a suitable inner contour of the Trap 59 pushes aside until the magazine 40 returns to its vertical position occupies.

Between one as a receptacle 60 for an isolated fastener serving, slotted pivot plate 62 and the support plate 41 is one Transfer device 70, the scenes of which by gravity from the slot 52nd dropped, isolated fastener around a horizontal axis turn and feed the swivel plate 62 through the side slot 64 so that the head 102 rests on the swivel plate 62 and the shaft 104 in Direction of the driving axis 50 below the support plate 62 by a Opening of the same extends. The transfer device 70 has two on the Bottom of the support plate 41 attached, in the direction of travel about the strength of the Shaft 104 on spaced backdrop plates 72, 74, the backdrop edges of which from the discharge opening of the bottom open box 45 diagonally across To extend direction of travel 12 in the direction of the receptacle 60. For safe Guiding one slipping on the backdrop plates 72, 74 Fastener serves an upper link plate 75, the support plate 41 goes out and extends over a fastener head 102. Thereby 4, an isolated fastening element 100 from the box 45 and fall through the slot 52 so that its head 102 on the backdrop edges the link plates 72, 74 slide while its shaft 104 between the two Link plates 72, 74 is movable.

As in particular FIGS. 6 and 7, the swivel plate 62 is relative to the plate 32 vertically spaced and pivotable on the plate 32 about an axis 38 suspended, which extends in the direction of travel 12 and transversely to the driving axis 50 lies. Furthermore, a guide pin 66 is attached to the pivot plate 62, the protruding free end in a provided in the guide plate 44 Guide slot 68 is captured. The guide slot 68 has a middle one Section 65 which extends parallel to the driving axis 50; he owns one lower end portion 67 which is in an arc transverse to the direction of travel and Driving axis 50 extends, and it has an uppermost portion 69, which extends towards the transfer device 70.

Is the carriage 20 in its upper end position, is the Guide pin 66 in the uppermost section 69 of the guide slot 68, so that the Swivel plate 62 is inclined to the backdrop plates 72, 74 and the recording a fastener head 102 facilitated. If the sled 20 like lowered, the guide pin 66 moves in the central section 65, so that the fastener in precise alignment of its shaft on the Driving axis 50 is located.

After filling the magazine 40 with a number of fasteners on the first downward stroke of the slide 20, the magazine 40 as described so far pivoted to the side that the bottom fastener of the Deflection strip 55 is released and falls on the support plate 41. Limiting the Ejection opening 53 of the cage 45 prevents the magazine from being pivoted to the side 40 that the fastener resting on the support plate 41 into the slot 52 can curl up. During the subsequent upward stroke, the magazine 40 becomes like described returned to its starting position, so that the Deflection strip between the lowest, lying on the support plate Fastening element and the fastening element following next upwards pushes the next fastener over the deflector 55 arrives and the isolated fastener by limiting the Opening 53 in box 45 is pushed into slot 42. That through the slot 42 falling, isolated fastening element reaches the receptacle 60. The next downward stroke of the slide 20 is on the swivel plate 62 a ready-hanging fastening element, so that a tubular gripper 36, which surrounds the driving tool penetrate into the interior 106 of the shaft 104 can. It is recommended that the outer contour of the gripper 36 in Form closure with a corresponding inner contour of the interior 106 of the shaft 104 can reach. As FIG. 9 shows, head 102 and shaft 104 of the Fastening element 100 made of a plastic sleeve 108, which in the upper Section is hollow and the head of a protruding from the sleeve 108 below Screw 109 houses. After the positive engagement of gripper 36 and the sleeve 108 is produced, it is no longer necessary that the pivot plate 62 the Head 102 engages under. Therefore, the guide pin 66 can now be in the lower Section 67 pass over so that when the carriage 20 continues its downward stroke, the Guide pin 66 swings the pivot plate 62 under the head 102 to the side and releases the drive-in path for the fastener.

Are fasteners from the described driving device without Plastic sleeve 108, for example treated nails or screws, should the transition of the guide channel 68 from its parallel to the driving-in direction 50 middle section 65 in the laterally bent bottom section 67 only then take place when the fastener due to its feed through the driving tool has found an immovable hold in the ground.

Figures 10 and 11 show a further variant of the invention, in which the Transfer device is changed.

The magazine 40 is in the initial situation, that is, when the carriage is in the top dead center, slightly pivoted, so that already a Fastening element 100 on the support plate 41 (see Figure 3), pushed by the superimposed additional fasteners. At the The bottom fastener is then driven down by the driving tool the other fasteners isolated. Of course, the location of the Cam 56 and the associated cam plate 58 (see Figure 2) accordingly adapt. In FIG. 10, the singling station belongs to the magazine identified by reference numeral 40. Except for the movement of the Magazine, i.e. its starting position and the subsequent one Direction of movement for the purpose of isolation remains the Separating device in this further embodiment largely unchanged. After the separation, the fastening element 100 falls on the Template plate 182 of the transfer device 170, wherein it is automatically 90 ° has rotated so that the shaft 104 protrudes downward with its tip. Previously tensioned by the downward movement of the tacker, by the deflector 189 is in the direction B over the symbolically represented positions 189a, 189b to the position designated 189c, the arcuate Portion 180 on which the striking arms 181, 181 'are rigidly arranged, into which 180c designated position. Here, the striking arms take position 181c the fastener 100. The pivoting of the entire lever joint takes place around the axis labeled 185, so that the articulated axis 184 has the "x" designated circular path. The one movable on the hinge axis 184 arranged locking lever 183 remains during the pivoting movement of the Lever joint aligned approximately horizontally, the spring 186 compresses becomes. During this tensioning process, the locking lever 183 engages behind with its shoulder 187 a nose or pin 188 protruding in its path of movement. From this Situation, the locking lever is only again when the upward movement Driving tool released, the spring 186 suddenly relaxes and the lever joint returns to its starting position, the striking arms 181,181 'forward, click onto the plate of the fastening element 100 and the fastener on the pivot plate 162 of the receptacle 160 catapult. It should also be noted that the platen 182 consists of two parts there is the slot 190 through which the shaft of the fastener To be carried out, must be open to the front and back to an inlet and outlet to provide for the fastener. The support elements for the Template plate are not shown.

Figures 12 and 13 show the pivot plate 162 of the receptacle 160. Die A special feature of this configuration is that in the area of the slot 164 intended arrangement of a captive device for the fastening element. For example, in the straight extensions of the diaphragm walls Opposing bores 199 are made, each in a spring 171 mounted ball 120 is used. Each ball protrudes with a cap as far out of the hole that the clear distance between the two balls is smaller than the shaft diameter, so that the shaft 104 of the Fastening element 100 engaged and falling out of the slot is prevented. The exit path of the balls is limited by plate 172 which has a size corresponding to the desired calotte dimension. The spring-loaded balls cause the fasteners to align, such that the device functions properly even on inclined planes.

Claims (24)

Driving device for a head and shaft Fastening element (100), such as a nail or screw, which preferably in a sleeve (108) with a molded disc or the same is at least partially housed, with a frame (14, 16), on which a driving tool along a vertical driving axis (50) is movably mounted, characterized in that in addition to the Driving tool an upright magazine (40) for receiving a Series of essentially equally oriented and horizontal one above the other lying fasteners is attached, at the output end (45) of the magazine (40) controlled by the driving tool Separation station (41, 55) is provided with a transfer device (70; 170) for the transfer of a single fastener each a receptacle (60; 160) coupled to the driving tool for a fastener, the lower end of the trajectory (67) laterally runs away from the driving axis (50). Apparatus according to claim 1, characterized in that it by means of a base plate (1) attached rollers (4, 5) can be moved. Apparatus according to claim 1 or 2, characterized in that with the Driving tool a gripper (36) is coupled, which during the downward stroke of the Driving tool in shape with the one on the holder (60) ready held fastener arrives. Device according to one of the preceding claims, characterized characterized in that the driving tool part of an electric screwdriver or hammer (30) which is parallel in a along the frame (14, 16) carriage (20) movable to the driving axis (50) is held. Device according to one of the preceding claims, characterized characterized in that the frame consists of several spaced and upright columns (14, 16) and one connecting the columns Crosshead (15), which are anchored on a base plate (1). Device according to one of the preceding claims, characterized characterized in that the slide (20) with handles (26, 27, 28, 29) is equipped, the vertical with respect to the carriage (20) are adjustable. Device according to one of the preceding claims, characterized characterized in that the lower end (45) of the magazine (40) is under control through the carriage (20) for the purpose of separating the lowest one in the magazine ready fasteners is laterally displaceable. Device according to claim 7, characterized in that the magazine its upper end on the frame (14, 15, 16) about a horizontal axis (51) is pivotally articulated. Device according to one of the preceding claims, characterized characterized in that at the lower discharge opening (53) of the magazine (40) a deflector element (55) is arranged, which is the lowest of those in the magazine ready fasteners only after lateral deflection of the Magazine (40) releases down. Device according to one of the preceding claims, characterized characterized in that below the discharge opening (53) of the magazine spaced link plates (72, 74) arranged as a transfer device which are the head (102) of a falling, isolated Underneath the fastener and the shaft (104) of the Allow the fastener to slide between them. Device according to one of the preceding claims, characterized characterized in that the receptacle (60) is a slotted (64) swivel plate (62), which in an upright guide plate (44) partially parallel to the driving axis (50) and with the Driving tool is motion-coupled. Apparatus according to claim 11, characterized in that on the A swivel plate (62) is provided with a guide pin (66) which is in a Guide slot (68) immersed in the guide plate (44). Device according to one of the preceding claims, characterized characterized in that the guide slot (68) has a lowermost end portion (67), which laterally away from the parallelism to the driving axis (50) extends, further has a central portion (65) which is parallel to the Driving axis (50) extends and has an uppermost section (69) which is directed to the transfer device (70). Device according to one of the preceding claims, characterized characterized in that the driving tool and the gripper (36) by one Cylinder (35) are surrounded, the bottom part (33) in a frame-fixed Support plate (41) is guided vertically and on which the swivel plate (62) is pivotally suspended about a horizontal axis (38). Device according to at least one of the preceding claims, characterized characterized in that the transfer device (170) one below the Separation station (41, 55) arranged, an isolated Fastening element (100) receiving template (182) and one Lever joint (180,181,183), which during the downward stroke of the Driving tool tensioned and in front of the path of the isolated Fastening element (100) can be positioned on the template (182) in the tensioned situation can be locked and during the upward stroke of the driving tool its pretensioning and locking for the purpose of driving the Fastening element on the receptacle (160) is detachable. Apparatus according to claim 15, characterized in that the template (182) one open on both sides between the singling station and the receptacle Has slot (190). Device according to one of claims 15 or 16, characterized in that that the template with a plate (162) of the receptacle (160) of the same height is aligned. Device according to at least one of the preceding claims, characterized characterized in that one with the lowerable driving tool vertically movable deflector (189) is provided. Device according to at least one of claims 15-18, characterized characterized in that the lever joint has an arcuate arm (180) at least one striking arm (181) rigidly arranged thereon and one articulated at the free end of the arcuate arm (180) Has locking lever (183), the arm (180) about an axis (185) is pivotally mounted. Device according to at least one of claims 15-19, characterized characterized in that the arm (180) in the path of movement of the deflector (189) protrudes. Device according to at least one of claims 15-20, characterized characterized in that the locking lever (183) one for reaching behind a nose (188) suitable paragraph (183). Device according to at least one of claims 15-21, characterized characterized in that a tensionable in the path of movement of the lever joint Spring (186) is arranged. Device according to at least one of claims 15-22, characterized characterized in that in the receiving slot (164) of the swivel plate (162) Receptacle (160) retaining means (120) for one driven into the slot Fastening element (100) are provided. Device according to at least one of claims 15-23, characterized characterized in that the restraint means (120) by from the side Slotted walls protruding spring-loaded and through the shaft (104) of the retractable balls inserted into the slot (164) are formed.

Images