DE2553080A1 - STAPLER FOR STAPLING LOOSE SHEETS - Google Patents

Description

PATENT ADVOCATES A. GRÜNECKER

dipl-ins

H. KINKELDEY COO OUOU, _f . STOCKMAlR

.. '■ ·. DR-INQ Α «Ε ICALTEO?

K. SCHUMANN

. Dft RHI NAT DIPL-PHYS

P. H. JAKOB

DlPL-ING

G. BEZOLD

DR RB ^ NAX- DfFl ₁ -CHBA

MUNICH

E. K. WEIL

DFl REFt O6C ING.

LINDAU

8 MUNICH 22

MAXIMILIANSTRASSE * 3

November 26, 1975

P 9520

D / 74658

XEROX CORPOBATION

Xerox Square, Rochester, New York 14644, USA

Stapler for stapling loose sheets of paper

The invention relates to a sheet stitching machine

It is directed to a stapling machine which automatically stapled the pack together upon the introduction of a pack of loose sheets

Machines for stapling a pack of loose sheets together in a relatively permanent lorm are already in several Executions in use. One type of such machine uses a wire taken from a supply spool.

609827/0219 ORIGINAL INSPECTED

TELEPHONE (OS9) 922862 TELEX O5-S938O TELEGRAMS MONAP

2553P8Ü

men and is formed into a staple by molding in the machine at the beginning of the stapling process. After that it will be fresh shaped staple knocked through the pile of loose sheets of paper and bent over, making a relatively permanent bond arises

Stapling machines of this type usually contain some means of shaking each loose sheet of paper with each other and with the stitching head or stapling heads of the machine align. Also, some ejection mechanism is usually provided to eject the finished package and to free the machine for further use.

The actuation or control of such stapling machines, such as the above-described stapling machine for wire stitching is usually done by a manually operated start switch. the Operator loads the loose sheets into the machine and, after shaking the loose sheets, presses the machine start switch to staple the sheets together.

The invention aims to provide a stapling machine which is equipped with a controller to control the machine according to the arrangement of the sheets to be stapled in the loading trough without further intervention automatically take action by the machine user. The control should work automatically, so that the in the Paper sheets fed into the machine are stapled together after a preselected period of time from the introduction of the sheets will. The length of time can serve to keep the loose sheets to arrange into a pack, which is then stapled.

To achieve this, the stapling machine according to the invention the following parts: at least one stapling head that, when actuated drives at least one stapling element through individual sheets to form a stapled pack of sheets; a Trough for holding the sheets to be stapled, the outlet side of which is up to a functional position next to the stapling head

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at least one retractable stop on the outlet side of the trough is sufficient to bring the sheets to be stapled into the correct position; a paper jogger which aligns the sheets with one another and brings them to bear against the stop; an ejecting device that removes the stapled bundle of sheets; withdrawing a drive mechanism which drives the H _e ftkopf, the stop and operates the ejector, and. in such a predetermined order that the sheets are stapled together and the stapled sheet pack is ejected; and a controller responsive to sheets placed in the tray and, after a preselected delay, activating the drive mechanism to staple the sheets, the delay allowing the jogger to align the sheets prior to being stapled together.

Further features, details and advantages of the invention emerge from the following description of an exemplary embodiment with reference to the accompanying drawings. Show in it;

1 shows a side view, partly in section, of a stapling machine, which contains the control according to the invention;

Figure 2 is an end view of the stapler shown in Pig.1 which Illustrates details of the tray receiving the leaves;

Fig. 3 is a view showing the drive mechanism for the in Figure 1 shows the machine shown;

Pig.4 a top view showing the details of the combined clutch and brake illustrated for the drive shown in Mg.3;

Pig. 5 is a sectional view along the line 5-5 of FIG shows the combined clutch and brake of Figure 4;

6 shows a circuit diagram of the control according to the invention.

In Figure 1, an embodiment of a stapling machine 10 is shown

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shows that is suitable for the control according to the invention contain. The stapler 10 has a free-standing frame 12 on which a trough 14 for receiving the to be stapled Sheets 16 is attached, as well as at least one stapling head 18 for stapling individual groups of sheets 16 to pack 20, an output basket 21 for receiving the stapled packs 20 and a transport device 19 for discharging the finished packs 20 from the point under the stapling heads 18 into the output basket 21. A suitable drive mechanism 22 is provided, to operate the staple heads 18, transport device 19 and other auxiliary devices in an integrated relationship, as will be explained in more detail below.

As can best be seen from]? Ig.1, 2 and 3, the Trough 14 a platform 24 on both sides by upright Guides 25, 26 is flanked. As is readily understood by those skilled in the art, are one of the guides or also both guides 25, 26 in the direction of each other and away from each other adjustable to the effective width of the trough 14 with the To be able to adjust the width of the sheets to be stapled. To prepare for stapling the side edges of the sheets 16 together to align, one or more finger-like paper joggers 28 are provided. The paper jogger 28, which over the Platform 24 protruding upwards are suitably supported in order to be adjustable together with the lateral guide 25. The paper vibrators 28 sit on an oscillating shaft 29 which in turn vibrates with the aid of an eccentric 30 is moved. The eccentric 30 is driven by a belt drive 52 rotated by a side jogger motor 31.

Two retractable stops 35 serve to position the leading edge of the sheets 16 under the stapling heads 18 bring. To align the ends of the sheets 16 in the trough 14, next to the rear end of the platform 24 are finger-like Paper jogger 37 is provided. The paper joggers 37 sit at intervals on an oscillating shaft 39. An arm 41 connects

609827/0219

the oscillating shaft 39 with an eccentric 42. The eccentric

42 is driven by a final vibration motor 44 via a belt drive

43 rotated. To adapt to different sheet sizes, an auxiliary frame 40, which carries the paper jogger 37, is in the longitudinal direction movable to and from the stops 35 for the sheet margins, with suitable slots not shown in the platform 24 allow the paper jogger 37 to be moved. Suitable locking means (not shown) are provided to fix the subframe 40 and the paper jogger 37 in the selected position.

The stapling heads 18 represent any commercially available stapling mechanism of the type which drives an inverted U-shaped staple, usually made of metal, through a package of sheets 16. In the chosen example stitching machine 10, two reciprocable stitching heads are provided as the stitching heads 18, a partially formed Heftkla the downstroke he mm, which is previously prepared from a drawn off from a supply spool 50 wire, record, and they completed reverse to a Shape "U". As the mechanism continues to move, the staple is driven through the pack of sheets in trough 14 and, in cooperation with a lower anvil 77, is turned over so that it is secured in place. An eccentric crank 52, which is seated on a drive shaft 68, actuates the stapling heads 18 via a connecting rod 53 in a timed manner, as will become clear from the following. For a more complete description of the puncture of the staple heads of the type shown, reference is made to US Pat. No. 3,076,196.

The stops 35, which serve to move the leading hand of the sheets lying in the trough 14 into the correct position bring are supported so that they can be lifted into the path of the sheets 16 and lowered from the path. the Stops 35 are synchronized with the activity of the stapling heads 18 with the help of a cam-controlled lifting

609827/0219

rod 51 raised and lowered, for which purpose a cam 50 is provided on the drive shaft 68

The transport device 19, which serves to eject the finished packages 20 after the end of the stapling, has an ejection roller 60, which is supported under the platform 26 of the trough for a swinging movement. A belt drive 61 connects the ejection roller 60 with an output shaft 62. The shaft 62, which is driven by the main motor 64 via a belt 91, in turn rotates the ejection roller 60 in the by the solid solid arrow in Pig. 1 direction indicated if the main motor 64 is turned on. Am crouching 67 on the drive shaft 68 raises and lowers the ejection roller 60 via a lever connection 69 in time with the puncture of the stapling machine 10. Front and rear discharge rollers 70, 71 are above the platform 26 on either side of the stapling heads 18 rotatably supported. The loading roller 71 forms, in cooperation with a lower roller 72, a pair of transport rollers between through which the finished pack 20 passes in order to be conveyed by the rollers 71, 72 into the output trough 21. The unloading roller 70 is arranged opposite the ejection roller 60 at a distance above the level of the platform 24, so that for loading the stapler 10 sheets 16 can be stacked under it. The roller 70 cooperates with the roller 60 when it is raised is to grasp the stapled pack 20 and move it from the point under the stapling heads 18 into the gap of the roller pair 71, 72 forward. The pair of rollers 71, 72 then ensures that the finished pack 20 is transported further into the output basket 21. The discharge rollers 70, 71 and 72 are driven by the main motor 64 via belt 73 in the direction of a solid line in the direction indicated by the arrow shown in Pig. 3

As described, the staple heads 18 have a lower anvil 77 for turning over the ends of the staples. The anvil 77 is supported on the frame 12 so that it can be moved up and down. It is driven by the drive shaft 68 via a cam 78 with a cam follower 79 moves.

609827/021 9

How on from the Pig. 4 and 5, a gear meshes 90 on the output shaft 62 with a gear 92 on an input shaft 93 for a clutch. The output shaft 62 is of driven by the main motor 64 via a belt 91. The shaft 93 represents the input shaft to a magnetically controlled clutch 94, which when the clutch solenoid 95 is excited, the input shaft 95 with the drive shaft 68 for a single Rotation clutch. The clutch 94 has a braking mechanism 97 which is always effective when the clutch 94 is disengaged is to brake the drive shaft 68 until it stops. As already mentioned, the drive shaft 68 carries the control cams 50, 67 and 78 for the stops 35 and the ejection roller 60 and the anvil 77. Next on the drive shaft 68 is also the. Crank 53 for the stapling heads 18 attached. Form the control cam 50, 67 and 78 and the crank radius of the crank 53 are chosen so that an integrated puncture of the various parts driven by them come about »

As can be seen from Pig.6, the main motor 64, the motor 31 for the lateral paper jogger and the motor 44 for the rear paper jogger are connected via a main switch 110 to an electrical power supply which is embodied by lines IA, Ii2. A control relay 112, which includes an adjustable delay element 111 for delaying the energization of the relay 112 by a preselected period of time, is connected via a trough switch 114 between the lines L1, L2. The trough switch 114 is suitably attached to the trough 14 so that its switching arm 115 protrudes somewhat over the platform 24 and into the trough area. When one or more sheets 16 are introduced into the tray 14, the switch arm 115 is depressed by the sheets and the switch 114 is actuated so that the delay element 111 is energized. After the selected period of time, the delay element 111 energizes the relay 112.

The solenoid 95 of the clutch 94 is normally closed

609827/0219

120 of a safety device 130 and a normally open contact 113 of the control relay 112 are connected to the lines L1, L2. A safety switch 125 is provided which is attached to the machine frame 12 such that its switching arm 126 in the path of the connecting rod 53 lies. As a result of this arrangement, the connecting rod 53 briefly detects the return stroke of the stapling heads 18 the switch arm 126 so that the switch 125 is closed will. The safety switch 125 is in line with the safety device 130 which is a relay. A normally open contact 131 of relay 130 bridges switch 125.

When the stapling machine 10 is in operation, the main switch 110 is initially closed, whereby the main drive motor 64, the motor 31 for the lateral paper jogger and the motor 44 for the rear paper jogger. The main propulsion engine 64 moves the ejection roller 60 and the discharge rollers 70, 71, 72 via the output shaft 62, the rollers 60, 70, 71, 72 in the direction indicated by the solid line arrows in Fig.i. Simultaneously the input shaft 93 of the clutch is rotated. When the clutch 94 is disengaged and the brake 97 is engaged, the drive shaft moves 68 not.

When the motor 31 is energized, the lateral paper joggers 28 vibrate back and forth in order to align the side edges of all the sheets 16 lying in the tray 14 with one another. According to oscillate at energization of the motor 44, the rear paper jogger 37 back and forth to the front edge of the sheets lying in the trough 14 to move forward against the stops 35 and to bring simultaneously the front and rear edges of the sheets to each other to cover ₀

As soon as a pack of sheets 16 to be stapled is placed on the platform 24 of the tray 14, the tray switch 114 is activated actuates and closes a circuit to the delay element 111. After a predetermined period of time, the length of which depends on the Setting of the delay element 111 depends, that is

609827/02 19

Control relay 112 energizes and closes its contact 113. The mentioned period of time can be used to add more sheets to those in the tray 14, and also gives the joggers 28, 37 the possibility of perfecting the alignment of the sheets in the tray 14.

When the relay contact 113 is closed, an excitation circuit is established to the clutch solenoid 95 closed, whereby the clutch 94 is engaged and the brake 97 is released. By the Engagement of the clutch 94 becomes the clutch input shaft 93 coupled to the drive shaft 68 and rotates the latter one revolution. The single revolution of the drive shaft 68 actuated in the time sequence determined by the configuration of the cams 50, 67, 78 and the crank radius of the crank 52 is the staple heads 18 and anvil 77 to staple the sheets 16 together, pulls back the stops 35 and lifts the ejection roller 60 so that it interacts with the rollers 70, 71, 72 conveyed the stapled pack 20 into the output basket 21.

When the stapling heads 18 are actuated, the connecting rod 53 for the stapling heads 18 briefly closes the safety switch 125 »to close the circuit to safety relay 130. The relay 130 closes its contact 131 and opens its Contact 120. By opening the relay contact 120, the circuit to the clutch solenoid 95 is interrupted, so that after one revolution, the clutch 94 is disengaged and the brake 97 is applied. This prevents the Stapling heads 18 can be started again before the previous stapling cycle is completed, if the tray switch 114 closes again prematurely or accidentally does not open after stapling. The safety relay 130 remains energized until either the trough switch 114 or the main switch 110 is opened.

To enable manual operation of the stapling machine 10, an S "expensive selector 140 is connected to the normally closed contact 120 of the security

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Relay 130 and with the clutch solenoid 95 connected in series between the lines ΊΛ, 12. The tax selector 140
is also in series with the normally open safety switch 125 and the safety relay contact 131 on the lines I »1, 12. In the circuit to the delay element 111
a manual selector switch 141 is provided. By opening the selector switch 141, the delay element 111 is made ineffective and the actuation of the tray switch 114 by the leaves in the tray 14 is also prevented.

In operation, the selector switch 141 is opened in order to make the trough switch 114 and the delay element 111 ineffective. Closing the control selector 140 by hand closes a circuit to the clutch solenoid 95 and energizes the clutch 94 so that the stapler 10 performs a duty cycle in the manner described above. During the stapling process
the safety switch 125 is closed by the crank 52, so that the safety relay 130 is energized, which in turn opens the relay contact 120 to the circuit to
To interrupt clutch solenoid 95, however, its holding.
contact 131 closes. This offers protection against repeated, unintentional actuation of the stapler 10,
if the control selector 140 remains closed.

Changes to the embodiment described are possible within the scope of the invention.

609827/0219

Claims (4)

" ^ΊΊ ~ 255308Π Expectations 1 * J sheet stapler, characterized by ^ - 'at least one stapling head (18), which when actuated at least drives a stapling element through individual sheets (16) so that a stapled bundle of sheets (20) is formed, a trough (14) for receiving the sheets to be stapled, the outlet side of which up to a functional position next to the stitching head (18) is enough, at least one retractable stop (35) on the outlet side of the tray to place the sheets to be stapled in the correct position Able to bring a paper jogger (28, 37) that feeds the sheets together aligns and brings it to rest on the stop (35), an ejection device (19) which removes the stapled bundle of sheets, a drive mechanism (22) which drives the stapling head (18), retracts the stop (35) and the ejector operated in such a predetermined order that the sheets are stapled together and the stapled bundle of sheets is ejected, and a controller (111, 112, 114, 115) which is on in the tray (14) responds inserted sheets and, after a preselected delay, sets the drive mechanism in motion stapling the sheets together, the delay allowing the jogger to staple the sheets prior to being stapled together align with each other 2. stapling machine according to claim 1, characterized in that the control contains a timing control element (111, 112) which engages and prevents when the stapling head (18) is actuated, that the drive mechanism (22) is set in motion before the preselected delay has elapsed 3 · stapling machine according to claim 2, characterized in that 609827/0 ^ 19 The timing element is adjustable to the length of the Delay to vary. 4. stapling machine according to claim 2 or 3, characterized in that the controller has a manual control part (140, 141) for actuation of the drive mechanism by hand, and that the hand control part has a switch (141) for inoperative of the timing member (111). : 0 9 8 2 7 / (J ^ 1 9 Le first