DE2450167A1 - AUTOMATIC FEED DEVICE FOR FASTENING ELEMENTS FOR USE ON POWER-OPERATED TOOLS - Google Patents

Description

.Automatic feed device for fasteners for use on power-operated tools

Priority: October 23, 1997> / V. St. Ji. Registration no .: 4o3

The invention relates to an automatic feed device for fastening elements for use on power-operated ones Tools and a belt that holds a number of such fastening elements together for advancement.

The power tools that the automatic Feed device for fastening elements according to the invention is used to drive fastening elements in the form of pins, bolts, dowels and the like. In concrete, steel, wood, masonry and the like. Power-operated tools for driving of fasteners, especially tools, in which a Powder charge used to drive a piston, which then drives the fastener, can be found in construction

- 5098ί7 / 034 · Β '

Industry diverse uses for various purposes. What is important here is the speed at which a tool can both can be loaded with fasteners as well as with propellants, because the faster a tool to load int to thus, a series of fastening operations can be carried out more quickly, resulting in a reduction in the cost of fastening work leads.

The object of the invention is to provide an improved feed to create fasteners that use a variety of fasteners takes up and this after each attachment:; - process automatically into a power-operated position in a position suitable for the advance after the previous fastening process Tool advances.

The object of the invention is also to create an improved belt /
that holds fasteners together for advancement into a power tool in a manner that readily allows the fasteners to be freed from the belt and does not interfere with the fastening process.

To achieve the object on which the invention is based, an automatic feed device for fastening elements for use on a power-operated tool is created, which has a mouth socket with an opening for receiving a fastening element to be driven. This device is characterized by a magazine housing with an upper part supported by the muzzle sleeve and a lower part

. "" ■ "■ 505817/0"«" p

BATH

with a cylindrical side wall, a curved path in this side wall, a driver that is in the cam path between a first loading position and a second position in the vicinity of the Opening in the muzzle sleeve is movably mounted, a Lid with a side wall at a distance from the side wall of the lower part to create a space for a large number of fastening elements receives, means for biasing the driver towards the opening in the muzzle sleeve, and a device for rotating the driver against the force of the Vorsp anηe device.

Further refinements of the invention emerge from the subclaims emerged.

The automatic feed device for fasteners according to the invention is suitable for use on power tools that have a muzzle sleeve in which an opening for receiving a fastening element is provided. The apparatus includes a magazine housing with one of the Muzzle bushing supported upper part and a lower part, which has a cylindrical side wall. There is one in this side wall Cam or cam track formed, and a driver is movable accordingly. At a distance from the side wall is a Lid provided so that a feed path for the fastener is created. The driver is biased towards the opening in the muzzle sleeve by a Pedsr. It is also a handle is provided with which the driver moves against the

50 9817/0345

Tension of the spring is rotated in the loading position, in which the Driver is releasably held so that fasteners can be loaded or inserted.

The invention and advantageous details of the invention: are described below with reference to schematic drawings of an exemplary embodiment explained in more detail. Show it:

Fig. 1 is a longitudinal section through a tool with the front, direction according to the invention, in which the individual components of the tool are shown in such a position that the movement the housing leads to the front of the barrel assembly for cocking the trigger device;

Fig. 2 is a view of the mouth end of the tool} Fig. 3 is a cross-sectional view taken along line 3-3 in Fig. 1; Fig. 4 is a partial section along the line 4-4 in Fig. 3j Fig. 5 is a partially sectioned side view of the front part of the tool in the direction of the arrows 5-5 seen in Figure 2; :

Figure 6 is a cross section taken along line 6-6 in Figure 1; ^.: Figure 7 is a view of the front or muzzle end of the barrel of the tool shown in FIG. 1;

8 is a side view of the barrel seen in the direction of the arrows in FIG
^: 'Flg. 9 shows a partial section through the tool according to FIG. in which the magazine of the tool for automatic feed in

its furthest rearward position compared to the 509817/03 45

The rest of the tool is shown ι

Fig. 10 is a schematic partial view of a plurality of -Fastening elements which are held together by a belt used in connection with the tool according to FIG. 1;

Fig. 11 is a section along line 11-11 in Fig. 10 in enlarged scale;

FIG. 12 shows a longitudinal section along the line 12-12 in FIG. 11;

Fig. 13 is an end view of a segment of the belt and of the fastening element in the direction of arrows 13-13 in FIG.

FIG. 14 is a top view of the belt and fastening elements viewed in the direction of arrows 14-14 in FIG. 11.

The drawings, in particular FIG. 1, show a tool to which the invention can be applied. The tool has a housing with a tubular front part 4 and a rear part 6. In the tubular Front part 4 an elongated opening 8 is provided,

the loading and unloading with a propellant charge or /. Propellant cartridge he öglicht m. /
The trigger device 1 0 is accommodated in the rear part 6 of the tool housing 2; the rear part also comprises a pistol-like grip 12 and a protective cover 14 for the trigger

The trigger device 10 comprises a shutter 16 in. which a frustoconical opening 18 is formed. Behind the lock 16 is a firing pin 20 mounted axially movable in the tool housing 2, which has a frustoconical nose 22, a body 24 and a rearward facing rod 26 includes.

"509817/0345

OI C Π 1 The firing pin is pressed forward by a suitable spring 2ö. A detent extends radially from the body 24 of the firing pin 20, element 30. This is biased outward by a spring 32.

In the rear part 6 of the tool housing 2, an unlocking or tensioning rod 34 is attached, movable to and fro, which. has a front portion 36 which extends through the closure 16 extends in the tubular front part 4 of the tool housing 2. The tension rod 3 ^ · can be biased by a spring 38 to the front be. In addition, the tension rod can have an elongated opening 40 through which the latching element 30 can protrude on the firing pin.

Above the protective cover 14 for the trigger can be a trigger 42 with a trigger nose 44 by means of a pivot pin be pivoted. The trigger is resiliently urged away from the trigger position by a spring 48.

In the tubular front part 4 of the tool housing 2, a barrel assembly 50 is mounted so that it can move back and forth, which ■ extends away from the mouth end of the barrel. The barrel assembly includes a barrel 52 and a muzzle bushing 5 ^ attached to its front end in a manner described in more detail below. An opening 56 is formed in the barrel 52, which is a bearing for receiving it a cartridge or a loading space 58 at the breech end for receiving a propellant charge 60.

In the barrel assembly 50, a piston 62 can reciprocate

50 9 817/0345

be movably attached. The piston 62 has a generally cylindrical head 64 and a narrower, elongated, cylindrical shaft 66,

The muzzle liner is attached to barrel 52 by means which are most clearly shown in FIGS. 1 and 6-8. At the front end of the barrel 52, the side wall having a first group of two bearing surfaces 68 and provided 70 gene on opposite sides of the vertical center plane of the barrel 52 apart V. ^, each of the contact surfaces 68 and ¹ JO lies in a plane which intersects the other in a line which lies in a perpendicular plane extending through the axis of the barrel 52. Is at a location behind the front end of the barrel 52, as Fig. 8 shows a second group of contact surfaces provided 7 ² and 74. This second group of contact surfaces 72 and 74 is provided in the circumferential direction around the axis of the barrel at a distance of 90 ° from the first group, as FIG. 7 shows. It can be seen from this that a shoulder 75 is formed in front of each of the contact surfaces 72 and 74 of the second group. It should also be pointed out that the first group of contact surfaces 68 and 70 ends at its rear end in the same vertical plane as the contact surfaces 72 and 74.

In the side wall of the mouth socket 54 is at one point a circumferential groove 76 is formed at a distance from the rear end thereof and is cut by two flat cutouts 78 and 80 which both intersect the opening 82 in the rear enlarged portion 94 of the muzzle sleeve 54. In the hat 76 there is a

509817/0 3 45

U-shaped tension spring 84 is arranged with a section 86 which has legs 88 and 90 which are bent towards one another and are arranged in the cutouts 7 ² and 74, respectively.

When the muzzle bushing 54 ^{is to be attached to the barrel 5 2} , it is arranged at 90 ° clockwise relative to the position shown in FIG and 70 of barrel 52 are aligned. The muzzle sleeve 54 can then be pushed telescopically over the end of the barrel 52 until the barrel 52 rests on a shoulder 92 in the muzzle sleeve 54. The 1-orifice socket 54 can then be rotated 90 ° counterclockwise, as seen in the direction of FIG. 6, so that the legs 88 and 89 of the spring 84 come to rest against the contact surfaces 72 and 74. The shoulders 75 prevent the muzzle sleeve 54 from being moved axially forward relative to the barrel 52. Due to its resiliency, the legs of the spring may deflect outwardly when the Ilündungsbuchse 54 is rotated, spring back to the legs of the spring 84 against the abutment surfaces 7 and 74 on the barrel ² 52nd In effect, this is a catch that resiliently prevents the Mündungsbuchs0 54 from being rotated relative to the barrel 52.

The mouth socket 5 ^ - is elongated overall and has a enlarged head 94 in which the shoulder 92 is formed, as well as a forwardly extending narrower area 96 in which an opening 98 for receiving a fastening element is made.

509817/0345

is formed. Inside the enlarged head 94 of the muzzle sleeve 54 is a barrel 52. Buffer element 1 01 from an appropriate Material such as polyethylene or the like. Added, as FIG. 1 shows, to the energy of the piston 62 in the Pail of an excessive strong drive of the same to take up.

At the front end of the tool, a magazine assembly 100 with a magazine housing 102 is attached, the one overall tubular upper portion 104 telescoping over a portion of the muzzle sleeve 54 and over the forward end of the Barrel 52 is pushed.

The lower part 105 of the magazine housing 102 is cylindrical as a whole and has an opening 106 which extends axially inward from its front end. In the side wall of this lower part, a cam track or cam track 108 is formed or embedded, which is delimited by two surfaces 110 and 112 that are spaced apart from one another. A spring 114 and a spring holder 116 are arranged within the opening 106. A cam follower element or a driver 118 fastened to the spring 114 can slide along the cam track 108. On the lower part of the magazine housing 102, a driver rotary member 120 is rotatably fastened with the aid of a pin or peg 121, which is used to move the driver 118 in the cam track 108. Furthermore, on the lower part is a curved cover 122 with an opening 124 for inserting a. Belt fastened with fastening elements, the side wall 123 is at a distance from the side wall of the lower part , so that a space 125 is created in which a belt with

■ 509817/034 5

Fasteners can be received.

In detail, the upper part has 1 04 of the magazine housing 102 has a rearwardly facing hollow cylindrical portion 127 and a narrower front portion 126 through which an opening 129 extends. The hollow one pointing backwards cylindrical portion 127 is expanded by the total Area of the mouth socket 54 arranged around, wherein the The narrower region of the mouth socket 54 extends through the opening 129. The opening 129 has a shape like that as a whole Outer surface of the narrower portion of the orifice sleeve 54, the is generally rectangular, the top and bottom are slightly curved. In the upper surface of the The narrower section of the mouth sleeve 54 is an axially elongated one Formed slot 128 in which the end of a screw 130 fastened to the magazine housing 102 is received, so that there is limited axial movement between the magazine housing 1 02 and the orifice sleeve 54 is possible, while a relative Rotational movement between these elements is prevented. The magazine housing 102 is in its forward position in relation to the mouth socket 54 from one between the mouth socket 54 and the magazine housing 102 arranged spring 132 is biased.

Into the opening 106 in the lower part 1o5 of the magazine housing 102 protrudes a square projection or a rod with a through opening 134 from the rear inner surface 136 into it. The pen holder 116 includes a hub 133, which is mounted on this rod 133, which is within a

509817/0345

square opening 140 is received in the hub, whereby the spring holder 116 rotatably with respect to the magazine housing 102 held but movable in the direction along the axis of the opening. The pen holder 116 also includes a circular disc 142 at the rear of the hub 138. The spring 114 consists of a metal band that spirals around the hub 138 of the spring retainer 116 is wound, with the inner end portion 143 at the hub and the outer end portion 145 of the spring on the driver 118 is attached. As seen in Figure 3, is the spring starting from the hub 138 wound counterclockwise, whereby the driver 11.8 a bias is imparted, the seeks to move the driver clockwise in FIG. 3.

The driver 118 has a curved base plate 144 which tends to slide on the spring 114, with a side portion is reduced so that a shoulder 146 is formed which rests on the outer edge of the disk 142 of the spring holder 116. A block 148 attached to the base plate 144 slides in and extends through the cam track 108. As the base plate 144 is wider than the cam track 108, the movement of the The driver is limited in the radially outward direction with respect to the magazine housing 102. An engaging portion 150 attached to block 148 for the strap containing the fasteners protrudes into the space 125 between the magazine housing 102 and the Lid 122 for engaging the end of a strap containing fasteners and the fasteners by one provided in the side of the mouth socket 54

5 0 9817/03 U 5

Forcing opening 152 into opening 98 in the muzzle sleeve.

The rotary driver member 120 is cup-shaped and overall has a diameter such that it fits into opening 106 fits in magazine housing 102. On the outside of the bottom 154 of the Driving rotary member 120 eats a handle 153 provided with the Help turning is possible. From the side wall 1 58 of the rotary driver member 120, two extend at a distance from one another lying legs 154 and 156 axially backwards into the magazine housing 102 and lie on both sides of the base plate 1 - '(4 of the driver 118, so that the driver 11 θ and the rotary driver member can be rotated together are.

The pin or pin 121 protrudes through an opening 160 in the Rotary follower member 120, an opening 162 in the spring holder 116 and the opening 134 in the rod 133 of the magazine housing 102. The Head 164 of pin 121 is. in a countersink 168 in the handle 153 of the rotary driver member 120 added while on the other End of the pin that extends through the magazine housing 102, a snap ring 170 is attached to the various components to stick together. Between the rear inner surface of the magazine housing 102 and the spring retainer 116 is a spring which moves the spring retainer 116 and consequently the follower and follower rotary member 120 forward, i.e. viewed in FIG biased to the left. The snap ring 170 limits forward movement of these components.

The cam track 108 is shaped so that it can be used for locking 509817/034 5

of the carrier 118 is used in the loading position, i.e. in the position "in the, seen in Fig. 3, the driver 118 counterclockwise has been rotated. As can be seen from FIG. 5, the curve beam 108 has a section 173 whose center line is at continued rotation around the circumference of the magazine housing 102 around counterclockwise as seen in Fig. 3 moves rearward. At the end of section 173 is a forward facing portion 174 formed, whereby a shoulder 176 is created. The block 148 on the driver 118 is also provided with a Shoulder 178 formed with that formed in the Karvuiibahn 108 Shoulder 176 engages and the driver 118 holds in loading position.

A radially extending flange 180 is provided on the rear region of the lower part .1 05 of the magazine housing 102. In the side wall of the magazine housing, a shoulder 182 is provided at a location that is a predetermined distance opposite the flange 180 has to the front, this distance corresponds essentially to the width of a belt with fastening elements and the head region of a fastening element. The cover 122 is generally cylindrical in shape and lies with its inner wall 123 at a distance from the side wall of the lower part of the magazine housing 102, which is shown in FIG. essentially the thickness of the strap carrying the fasteners is equivalent to.

As FIGS. 10 to 14 show, an appropriate one Number of fasteners 188 from a supply strap 190 in

50981 7/0345

held together in a group. The supply belt 1 90 "has a Row of guide sleeves 192 for receiving fasteners which are connected to one another by webs 194. The fasteners 188 have a shank 196, a vsr-tapered Point 1 98 and a thickened head 200. The interior shape of the guide sleeves 192 is triangular overall in order to achieve a little surface contact with the shank 196 of the fasteners to achieve and at three corners thin wall areas z-u create.-Each corner is slightly shortened, so that flattened migon result at the corners, as can be seen at 202. The outside of each other adjacent guide sleeves 192 has upper and lower straight Areas 204 and 206, which run obliquely away from the web, whereby the belt is bendable. The rear end of each guide sleeve I92 has a circular countersink 208, which is the proper Insertion of the fastener allows. A slot extends across the front end of each guide sleeve 21 0, which enables the alignment of the belt 1 90 in a machine for arranging the fasteners and the Loskoinnsn of the guide sleeves 192 facilitated by the fastening element, if this is driven into the surface of a workpiece. In the upper side of the webs 194 there is a V-shaped hat 211 in each case formed, the severing of a fastener. ^ 183 and a guide sleeve 192 from the adjacent sleeve and thea adjacent fastener facilitated when the piston hits.

To load the tool with a supply belt, the Rotary driver link 120 in Flg. 2 seen clockwise

509'817 / 03AS BAD ORIGINAL.

rotates, whereby the driver 118 seen in Fig. 3 against the Is rotated clockwise in the cam track 108. If the driver 118 reaches section 173 of the curved path, it will relative to the magazine housing 102 moved axially rearward, whereby the spring 172 due to its engagement with the shoulder 146, which engages with the washer 142 of the spring holder 11 6 stands, is pressed down. When the block 148 on the driver i-1 S is moved past section 174 of curved path 108, presses the spring 172, the spring holder 116 and thus the driver 118 forward, so that the shoulder 178 on the driver 118 with the Shoulder 176 in the Kuryenbahn 108 engages and the Driver is held in the loading position.

A supply belt can then be passed through the opening 124 in the cover 122 190 are used, with the tips of the fasteners 188 point forward. The supply belt 1 90 is in the space 125 between the magazine housing 102 and the cover inserted and the head 200 on the fastening element from the flange 180 on the magazine housing 102 and the front edges of the Sleeves 192 from shoulder 182 in the side wall of the magazine housing 102 led.

After inserting a supply belt 1 90 into the magazine assembly 1 00, the driver 118 can be released from its loading position by pressing down the rotary driver member 120, thereby forcing the driver 118 rearwardly so that its shoulder 178 is out of engagement with the shoulder 176 in the cam track 108. The spring 114 causes the

509817/0345

Driver is rotated so that the engagement area 1 50 for the Supply belt with the end of the supply belt 190 in singriff steps and moves the entire supply belt 190 around space 125, until the leading fastening element with the sleeve passes through the opening 152 in the mouth socket 54 and properly is placed in the opening 98 in the orifice liner, uia to be driven out by the piston.

To operate the tool, the barrel assembly 50 moved backward until the end of the barrel engages the tie rod, like Pig. 1 shows. Then the front end of the Termination socket 54 against a corresponding workpiece surface be brought to bring the tool housing 2 relative to the barrel assembly 50 forwards. The tension rod 34 comes here at the rear end of the barrel 52 to the plant, so that the tool housing on the other hand is moved forward. Since the Raste-lcKLeut 30 protrudes into the opening 40 in the tension rod 34, the Y / tool housing 2 also moved forward with respect to the firing pin 20 until the face of the breech 16 at the rear of the barrel assembly 50 is present. In this arrangement, the locking element 30 of the firing pin 20 is in operational alignment with the trigger 44 of the trigger, so that when pulling the trigger 42, the trigger 44, the locking element 30 from the Opening 40 in the tension rod releases and the firing pin 20 is moved forward by the force of the spring 28 assigned to it, until its nose 22 passes through the truncated cone-shaped opening 18 is pushed out in the breech 16 and the cartridge 58 is actuated.

509817/0345

The gases generated by the exploding of the cartridge 58 will float the piston 62 forward and drive the fastener into the surface of the workpiece.

A comparison of Figures 1 and 9 shows that that the tool can not be cocked and fired by grasping the magazine assembly 100 and facing the tool ' housing 2 moved backwards. Ήΐη flange 212 on tool housing 2 limits the backward movement of the magazine arrangement 100 to a point at which it does not move the tensioning rod backward can. When the magazine assembly 100 is furthest back

position opposite dcra housing has taken in the it rests on the flange 212 of the tool housing 2, the Slot 128 in the Kündimgsbuchse 54, as Fig. 9 shows, a allows limited rearward movement relative to the muzzle sleeve so that the muzzle sleeve 54 and barrel 52 do not have been moved backwards to the trigger device 10 tighten. The HündungsbuchsG 54 still has to be opposed to a corresponding one Surface of a workpiece brought and the tool housing moved forward relative to it to the trigger assembly to tension. The relative movement made possible by the slot 12Ö in combination with the stop device in the form of the flange 212 aa housing eliminates the possibility that the tool is fired by grasping the magazine assembly 100 and cocking the tool into the air. The spring 132 ensures that the magazine arrangement 100 with respect to the muzzle sleeve 54 always the furthest forward position when the tool is not in use, so that the next fastening

509817/0345

BATH

element after resetting the piston through the coordination of the forward movement of the barrel assembly 50 relative to the work-

tool housing 2 and a pawl member or driver 214 for the piston back /
/ stelluno orcLnungsgenäS can be pushed forward into the muzzle socket and 'is ready for the next operation. A screw is provided as the driver 214 , after the removal of which the drill gun can be easily disassembled into two parts, for example for cleaning or for packaging.

The invention also relates expressly to: a power-operated Tool for attaching an automatic device according to the invention Feed device for fasteners, in it Housing ^ with a front and a rear part, one Barrel arrangement, which in the front part between a front Position with the bolt open and a rear position with the bolt closed is movably attached, a firing pin device , which is slidably mounted in the rear part, a clamping device, with the help of which the Firing pin device when the barrel assembly is moved to the bolt closed position from a fired Position can be moved into a tensioned position, a magazine for fasteners, one area of which is telescopic the barrel assembly is incorporated, a device allowing limited relative axial movement of the magazine with respect to the barrel assembly, and by means on the housing for limiting the amount of rearward movement of the

509817/0345

BATH ORIGINAL

Magazine in one place, with dsr the magazine is not so far is movable backwards that it brings the barrel assembly into position with the shutter closed, and through a device;

which biases the magazine in its foremost position with respect to the Laui arrangement.

This tool has a special feature _f

that the barrel assembly comprises a barrel and a release bushing detachably connected to the barrel, that the magazine for fasteners attached to the mitigation socket is that the relative axial movement allowing means has an axially extending slot in the Muzzle sleeve and means connected to the magazine and extending into the slot, and that the device on the housing for limiting the movement auaiaasses includes a splash that is suitable as an attachment for the magazine.

Furthermore, “the invention also expressly relates to a belt that accommodates a plurality of fastening elements for use with an automatic feed device according to the invention for fastening elements, the. a variety of Sleeves for receiving fasteners comprises, the are interconnected by webs that each sleeve has a triangular cross-section with cut corners to produce of flat surfaces, that the sides of the triangle are in engagement with a fastening element, and that the outer surface of adjacent sleeves above the web

509817/034 5

a flat area sloping away from the web, and below the web has an area that extends from the web i-reg is beveled.

According to a further inventive feature a circular counterbore is formed in one side of the belt and a groove is formed in the other side,

which extends parallel to the length of the belt; A V-shaped groove is formed in the web.

-5O9817 / 0345

Claims (7)

Expectations ΐ. } Automatic feed device for fasteners for use on a power tool that has a Muzzle socket with an opening for receiving a to be driven Has fastening element, g e k e η η ζ e i c h η e t through a magazine housing (102), with an upper, of the mouth socket (54) supported. Part and one a cylindrical Side wall having lower part, a curved path (1: Q8) in the side wall, a driver (ti8 |, which in the curved path, between a first loading position and a second Movable position in the vicinity of the opening in the muzzle sleeve is attached, a lid (122) with a side wall that ' at a distance from the side wall of the lower part and with this has a space (125) for accommodating a large number of fastening elements (188) forms a device (T 14) for tension the
From the front to the opening in the threaded bushing and a device (120) for rotating the driver against the force of the pretensioning device. 2. Apparatus according to claim 1, characterized by a device for holding the driver (118) in the first position and to release after loading. ... 3. Apparatus according to claim 2, characterized in that the device for holding the driver - 50-98177ΌΚ & ■ (118) one shoulder (t'76) in. The cam track (108) and one with it cooperating shoulder 078) on the driver. 4. Device according to one of claims 1 to 3, characterized characterized in that the upper part of the magazine housing is telescopically arranged on the muzzle sleeve so that it can be removed is that the lower part has a cylindrical wall portion that The magazine cover has a cylindrical inner wall at a distance from the outer wall. To limit the feed path for fasteners has that the cavity is in communication with the opening in the mouth socket, that an opening (124) in the Lid with the track is in communication that a cam slot is provided in the wall area that a driver in the Curved slot between a first loading position and a second position in the vicinity of the opening in the muzzle sleeve Is guided circularly movable that a device (150) is provided on the driver, which extends into the track and for engagement with a fastening element that an opening (106) extends axially into the lower part that in the opening a spring holder (116) is attached that a locking device to prevent only relative rotational movement between the spring retainer and the magazine housing, but not relative movement
Between these components in the axial direction opposite the axis of the opening is provided that a leather (314) is wound around the axis of the opening, the outer end (143) of which is attached to the spring holder (116) and the outer drawer (145) to the driver (116) connected when actuated to pretension from its first Position, in its second position is intended, and : -. «· -.-- 509317/0345 that a device for moving the driver the second position is provided in the first position. 5. Apparatus according to claim 4, characterized in that the curved path (108) has a first section, in which the driver is guided in a plane perpendicular to the axis of the opening, a second section in which the driver is guided away in the direction of the mouth of the opening, and has a third section which extends towards the mouth of the opening extends out, and that a device for biasing the driver in the third section when the driver is in its first position, and a device on the driver is provided that in the first position with the Kurver.bahn is engaged so that the driver is releasably held in the first position '. 6. Device according to one of claims 4 to 5, characterized in that between the spring holder (116) 'and deia magazine housing (102) a spring (172) for biasing the spring holder in the axial direction towards the mouth of the opening ^: is provided, wherein the spring retainer includes a washer portion (142) in engagement with the driver (118). 7. Device according to one of claims 4 to 6, characterized in that the device for moving of the driver lying at a distance from each other leg area has, which extend axially into the opening, that the driver has a base plate (144) which between the leg 509817/0345 areas is received, and that a pin arrangement (121) through the device (120) for moving the driver, extending the pen holder and the magazine, which allows limited movement in the direction axially of the opening. 509817/0345 Blank page