EP1003629A1

EP1003629A1 - Workbench

Info

Publication number: EP1003629A1
Application number: EP98943845A
Authority: EP
Inventors: Gerhard Sangmeister; Zbigniew Noniewicz
Original assignee: Wolfcraft GmbH
Current assignee: Wolfcraft GmbH
Priority date: 1997-08-14
Filing date: 1998-08-05
Publication date: 2000-05-31
Anticipated expiration: 2018-08-05
Also published as: DE19735336A1; EP1003629B1; WO1999008840A1; DE59807754D1; AU9159198A; US6299152B1

Abstract

The invention concerns a workbench (I) comprising clamping jaws (3, 4) supported on parallel spars (2). At least one (3) of said jaws moves towards the other (4) by means of driving members (32) associated with each spar (2) and capable of being individually actuated. In order to obtain such a workbench, enabling hands free actuating and clamping of non-prismatic parts, the driving members (32) have respectively a step-by-step drive and can be actuated together or individually with one foot with a double-lever technique.

Description

00001 work table 00002 00003 The invention relates to a work table with clamping jaws resting on two 00004 parallel bars, of which 00005 at least one can be displaced in the direction of the other clamping jaw 00006 by means of each bar and individually actuated drive elements. 00008 00009 Such work tables are known in various designs. For example, DE-C2 44 18 687 00011 describes a collapsible work table with two 00012 clamping jaws, one clamping jaw being displaceable along the spars 00014 via two spindle drives which can be actuated by 00013. The content of this patent specification is hereby incorporated in its entirety into the disclosure of the present 00016 invention, also for the purpose of including features 00017 of this patent in claims of the present invention as 00018. 00019 00020 With regard to the above-described prior art 00021, a technical problem of the invention is seen in 00022 in specifying a workbench of the type in question 00023, in which a free-hand operation is guaranteed00024, even if the 00025 clamping is not possible prismatic workpieces. This problem is solved first and for the most part in 00028 subject of claim 1, it being abge00029 that the drive members each have a 00030 step-by-step drive and 00031 of a double-lever technique can be operated together or a00032 individual. As a result of this configuration, 00033 can be clamped by hand freehand in the simplest manner. The workpiece can therefore be 00035 by the operator in the position to be clamped 00036 are held. The displaceable jaw is over

00037 a foot actuation in the direction of the other clamping jaw

00038 ke moves. By arranging a foot-operated

00039 double lever technology is still possible

00040 ben, the drive elements of each spar for the relocatable

00041 re jaw to operate individually, which also

00042 clamping non-prismatic workpieces

Is 00043. The double lever is designed so that

00044 both each individual lever for actuating an

00045 drive element for the jaw is actuated as

00046 both drive elements can be operated simultaneously

00047 can, for even, parallel displacement of the

00048 clamping jaw. In an advantageous embodiment of the

Subject of the invention it is provided that the drive

00050 a pull or push rod attached to the jaw

00051 ge, which by means of pedal-displaceable locking

00052 or clamps is gradually shifted. It is

00053 thus a clamping or locking drive for the relocatable

00054 jaw as given, for example, by cartridge removal

00055 pushers ago is known. By foot control

00056 gung one or both foot levers of the double lever

00057 the pull or push rod via locking or clamping pieces

00058 gradually towards the clamping position of the

00059 workpiece shifted. To securely clamp the

To ensure 00060 workpiece is further provided

00061 that the clamping or locking drive a releasable return

Has 00062 push lock. The latter can also be in the form of a

Be formed 00063 locking or clamping piece. To the tension

00064 To cancel the position, this backstop

00065 can be released, after which the clamping jaw back in

00066 direction to the original position

00067 can. For this purpose, it is further proposed that the return

00068 push lock can be released by pedal back actuation

Is 00069. For example, it is provided that by depressing

00070 ken of the pedal or both pedals forward 00071 the clamping jaw is achieved in the clamping position and

00072 by lifting the pedal to release the push-back

00073 lock is achieved. So both is clamping

00074 as well as the release of the workpiece after it

00075 Processing can be carried out freehand. In a further

Education of the subject of the invention is provided that

00077 the locking or clamping piece from an operating lever

00078 is relocatable. It is further proposed that

00079 the operating lever on a drive rod to the pedal

00080 is coupled. An arrangement is preferred

00081 voltage, in which each drive of the clamping jaw, with

00082 an actuator connected to a pedal via a drive rod

00083 control lever is assigned. The respective actuation

00084 can be used to relocate the pull or push rod

00085 the locking or clamping piece, for example, articulated

Be 00086. However, it is also conceivable that the locking or clamping

00087 only to be operated by the operating lever

Hit 00088 and thereby achieve a shift.

It is also preferably provided that the actuating lever

00090 for releasing the backstop into a take-away

00091 opening of a locking piece is immersed. Through a

00092 speaking displacement of the operating lever - as he

00093 believes that pedal reclamation is preferred

00094 the locking piece is also

Tows that this in one, the pull or push rod

00096 releasing position is pivoted or shifted.

00097 The clamped workpiece is then released.

00098 Next, when the backstop is released, the

00099 clamping jaw can be moved back again. In a

00100 advantageous development of the subject of the invention

It is provided that the double pedal is approximately in the middle

00102 a traverse is arranged. As particularly operated

00103 voltage advantage it turns out that the double pedal

00104 is gate-shaped. By pressing down on the foot

00105 actuation of one or both pedals becomes the clamping jaw, 00106 as described, advanced. To release the return

00107 pressure lock dips due to pedal back actuation

00108 the foot through the double pedal gate and acted upon

00109 by tightening the pedals on the underside. In a

00110 further development of the subject of the invention is provided

00111 hen that the drive rod each on one, on one

00112 from the foot pedal rotatable shaft seated in the area

00113 a pivot arm arranged articulated

00114 is and designed in the U space of the U-profile

00115 leg stretches. Thus, the are with

00116 the actuating levers of the respective drives

00117 ten drive rods in a hidden position within the

00118 U-spaces of the pillars. It is also provided that the

00119 Clamping or locking drive approximately in the middle of the bar, below

00120 of a floor formed by a U-shaped spar profile

00121 slide carrier is arranged. This results in a

00122 advantageous displacement distance of a clamping jaw

00123 of about half the length of the bar. For a larger variabi-

Achieving 00124 lity in the clamping area is an advantage

00125 adhere to further training provided that the other clamping

00126 jaw is slidably mounted on the spars.

00127 This jaw can be in a known manner

00128 two spindle drives operated by hand crank

00129 long the spars towards one jaw

00130 can be moved. Has proven to be particularly advantageous

00131 here that one, the other jaw carrying

00132 spar section can be swiveled up into a 90 ° position.

00133 This 90 ° position of the other jaw is preferred

00134 only in a fully relocated position of the

00135 a clamping jaw achievable. It is also provided that

00136 the other jaw in the raised position

00137 against the wide surface of the foot-operated jaw

00138 is adjustable. This means that workpieces can also be moved vertically

00139 can be clamped, for example for lateral processing

00140 the same. The clamping is done by means of 00141 of the already described spindle displacement of the swiveled clamping jaw. The described 00143 features of the invention are preferably provided on a collapsible 00144 work table, as is used in particular in the home improvement area for 00145. In this regard, it will be suggested that the legs of the workbench can be folded into a 00147 parallel position to the bars and locked in the 00148 position of use with the bars. However, 00149 corresponding configurations on professio00150 light work tables are also conceivable. 00151 00152 The invention is explained in more detail below with reference to the attached 00153 drawings, which only represent an exemplary embodiment 00154. It shows: 00155 00156 Figure 1 is a plan view of a 00157 work table according to the invention. 00158 00159 Figure 2 is a view according to the arrow II in Fig. 1. 00160 00161 Figure 3 shows the section along the line III-III in Fig. 1. 00162 00163 Figure 4 shows the section along the line IV-IV in Fig. 3. 00164 00165 FIG. 5 shows a perspective detailed illustration, the 00166 area of a double pedal for actuating 00167 drive elements of a clamping jaw; 00168 00169 FIG. 6 shows an enlarged detail according to the area 00170 VI-VI in FIG. 3, relating to a rest position of the drive illustrated; 00172 00173 FIG. 7 shows a representation corresponding to FIG. 6, 00174 however when the drive is actuated for 00175 advancing the one clamping jaw; 00176 FIG. 8 shows another illustration corresponding to FIG.

00177 lung, but when the drive is released

00178 for relocating one clamping jaw; 00179

00180 Fig. 9 shows an alternative embodiment of the drive

00181 house in a sectional view; 00182

10 shows a side view according to FIG. 2, but in

00184 a swiveled 90 ° position of the other

00185 Ren jaw. 00186

00187 is shown and described first with reference to

00188 FIGS. 1 and 2 a work station designed as a clamping table

00189 table 1 with two, on two parallel spars 2

00190 end jaws 3, 4. 00191

00192 The left clamping jaw 4 shown in FIGS. 1 and 2

00193 is in a known manner via two by hand crank 5

00194 actuatable spindle drives along the spars 2

00195 slidable. 00196

00197 The two spars 2 are on their, the hand cranks 5

00198 opposite ends by a cross member 6

00199 other connected. Furthermore, the two spars 2

00200 downwardly open U-profile, whereby the U-

00201 web forms a floor slide 70. 00202

00203 The two spars 2 are in their longitudinal extension

00204 divides into a fixed spar section 7 and one,

00205 in a basic position according to FIGS. 1 and 2, a

00206 Extension of this fixed spar section 7

00207 forming and pivotally attached to this

00208 cut 8. The latter carries the spindle-driven

00209 jaw 4. The two spar sections 7 and 8 are

00210 approximately the same length. 00211 In order to form a fixed upper frame, 00214 each are attached to the outside of each fixed spar section 7 00213 extending over the entire length of the spars 2 00214 cheek plates 9. The latter are flush with the surface of each U-web of the fixed spar sections 7 and, in their Be00218 projecting beyond 00217, provide a support for the U-webs of the pivotable 00219 spar sections 8 in their horizontal orientation. 00220 00221 On the cheek plates 9 two legs 10, 00222 11 are pivotally attached such that the work table 1 00223 can be folded. The articulation of the legs is identical on both sides of the table. The leg 00225 11 is pivotally mounted at its upper end about a hinge pin 12 00226, which is supported in the respective cheek 00227 sheet 9. The leg 10 is pivotally mounted at a lower pivot point around a pivot bolt 00229 zen 13. 00230 00231 The legs 10, 11 each have a U-profile on 00232 and face each other with the open side of their U-profile 00233. The hinge pins 12, 13 each penetrate 00234 both side legs of the legs 10, 11, the 00235 hinge pin 12 being received by an adapted, round bearing bore 14, while the hinge pin 13 00237 is received by an elongated hole 15, the longitudinal axis 00238 of which is in the longitudinal direction of the main leg 10 extends. 00239 00240 The supporting leg 10 has an extension 16, at 00241 the upper end of which is provided with a locking recess 17 00242 provided with a latching threshold 17. When the table is fully opened according to FIGS. 1 and 2, a locking bolt 1924 zen 19 is locked in the locking recess 18, which 00245 if 00246 is rigidly supported in the respective cheek plate 9. 00247 00248 The two pillars 10, 11 are connected to each other via a Koppelstan00249 ge 20, the four parts lying between 00250 the articulation points representing a joint rectangle 00251, which however has an additional degree of movement / freedom because of the elongated hole 15 00252. 00253 00254 In order to fold the work table 1 out of the position according to FIGS. 1 00255 and 2, first clamping levers 21 mounted on the articulation 00256 bolts 13 are released. In this way 00257 the locking is released, after which the upper frame 00258 can be raised at its left end in FIG. 2. 00259 Here, the locking pin 19 is lifted out of the table leg 00260 locking recess 18. 00261 00262 The pivotable spar section 8 is 00263 U-shaped in its free end region, which carries the clamping jaw 4, and has a longitudinal slot 00266 extending in the U-web in the longitudinal web 00266, through which a drive element 23 passes , 00267 which in the area of the spar section 8, ie inside 00268 half of the U-profile, has a threaded hole for 00269 passage of a spindle 24 which can be actuated by means of the hand crank 5, 00271 the clamping jaw 4 is fastened to this drive element 23 on the upper side of the spar section 8. 00272 00273 The two U-legs 25 of the pivotable Holmabschnit00274 tes 8 are extended to form frame cheeks, 00275 which extend on the inside along the fixed leg section 7 and on the outside along the 00277 cheek plate 9. At their free ends 00278 these U-legs 25 are penetrated by a pivot pin 26 mounted in the fixed 00279 spar section 7. 00280 th. Furthermore, the end regions of the U-legs 25 00281 are enlarged and have a concentric slot 27 aligned 00282 to the articulation point, 00283 which in turn is penetrated by a 00284 also in the fixed beam section 7 00005 th stop bolt 28. On this Stop bolt 28 00286, a clamping knob 29 is arranged on the outside. According to 00287 of this embodiment, the 00288 spar section 8 carrying the clamping jaw 4 can be swiveled up into a 90 ° position and then 00289 can be fixed via the clamping knob 29. Here 00290, the clamping jaw 4 can be placed 00292 against the broad surface 30 of the clamping jaw 3 via the spindle drive 00291 (cf. FIG. 10). 00293 00294 The fixed Holmab00295 section 7 carrying the clamping jaw 3 also has in the region of its U-web a 00296 longitudinal slot 31 through which a drive member 32 carrying the clamping jaw 3 00297 enters. The latter is within 00298 half of the spar section 7, ie in the area of the U-profile 00299, firmly connected to a pull rod 33 which extends in the displacement 00300 direction of the clamping jaw 3. 00301 00302 This pull rod 33 ends in one, approximately in 00303 drive box 34 00305 arranged in the middle of the spar 2 or in the end region of the fixed spar section 7. The latter is fastened in the U-profile of the stationary 00306 spar section 7 by means of screws 71 on the U-00307 legs. 00308 00309 In the drive box 34, a detent drive 35 is 0000310. This is composed essentially of 00311 a locking piece 00312 36 which interacts with the pull rod 33 and a 00313 locking piece 72 which forms a non-return lock 37 00315 also the locking piece 72, the latter by corresponding

00316 corresponding web arrangements in the drive box 34 can be tilted

00317 is mounted and with an L-shaped angled free

00318 end exits from the drive box 34 on the underside

00319 with formation of a driving opening 38. 00320

00321 The locking piece 36 is over a, the tie rod 33-

00322 send compression spring 39 against the direction of displacement

00323 the jaw 3 against a box-side support web

00324 40 supported. 00325

00326 The locking piece 72 is by means of another Druckfe-

00327 of 41, which is supported on a spring element

00328 42, in a slightly angled, the tie rod 33 against

00329 biased a reverse movement blocking position. 00330

00331 In the drive box 34 is another, via a

00332 pin 43 pivotally mounted operating lever 44th

00333 arranged. This operating lever 44 occurs at one end

00334 from the drive box 34 with enforcement of a

00335 window-like opening 45. The other, in the

00336 drive box 34 facing end is like a hammer head

00337, with a downward facing driver

00338 point 46 into the driving opening 38 of the locking piece 72

00339 occurs. An arm 47 which repels from this tip 46

00340 actuating lever 44 has a rounded end

00341 th, preferably pin-like actuation projection 48

00342 on. This is supported on the already mentioned

00343 spring element 42, to achieve a basic position. 00344

00345 The outwardly projecting end 49 of the actuator

00346 supply lever 44 is via a pivot pin 50 with a

00347 in the U-profile of the supporting leg 10

00348 rod 51 connected. 00349 00350 As can be seen in particular from FIG. 2, extends

00351 each drive rod 51 of each locking drive 35 within

00352 of the assigned supporting leg 10 by the respective actuating

00353 lever up to close to the area of one

00354 the two pillars 10 connecting together

00355 verse 52. The latter is also U-shaped

00356 and takes a swivel in her underground space, over her

00357 length split shaft 53 on. On both ends

00358 of this shaft 53, i.e. H. end of each shaft section

00359 tes in the area of the legs 10, is one, off

00360 the U-space towards the other pillar 11

00361 projecting pivot lever 54 attached. Every swivel lever

00362 54 carries a pivot pin 55 for articulating the free

00363 en, slightly cranked end of the respective greenhouse

00364 and 51. 00365

00366 In the middle of the traverse 52 is a double pedal 56 on the

00367 shaft 53 arranged, each pedal 57 with

00368 the respectively assigned pivot lever 54 via a

00369 shaft section is rotatably connected and both

00370 pedals 57 can be operated independently

00371 NEN. This has the consequence that a swivel displacement

00372 a pedal 57 a simultaneous swivel displacement

00373 of the pivot lever 54 causes. The double pedal 56 is

00374 designed essentially gate-shaped, each individual

00375 ne pedal 57 has an L-plan and its L-webs

Assign 00376 to each other. The gate thus formed is

00377 provided with the reference number 58. 00378

00379 Due to the configuration described, the drive

00380 organs 32 of the jaw 3 gradually one foot common

00381 sam or individually operable. For this purpose, a pedal 57

00382 or both pedals 57 simultaneously by foot control

00383 depressed. This has a rotational displacement of the

00384 pivot lever 54 according to arrow a in Fig. 2 for fol- 00385 ge. 7 is the resulting shift

00386 of the locking piece 36 shown by the actuating lever 44

00387 represents. It can be seen that by essentially

00388 end loading of the locking piece 36 by the

00389 actuating projection 48 of the actuating lever 44 that

00390 locking piece 36 initially tilted such that the edge

00391 te 59 of the bores passing through the pull rod 33

00392 tion 60 engages in the toothing of the pull rod 33.

00393 Another swivel displacement of the operating lever

00394 44 due to the depression of the pedal 57 has here

00395 together with an axial displacement of the locking piece 36

00396 the pull rod 33 result. The jaw 3 will

00397 here via the drive member 32 in the direction of

00398 tensioned position dragged. If pedal 57 is released

00399 leave, the locking piece 36 arises due to the

00400 spring force of the compression spring 39 back to the original

00401 position according to FIG. 6 back, with entrainment and

00402 associated reverse rotation of the actuator

00403 supply lever 44. The non-return lock 37 prevents

00404 here a return of the tie rod 33, since here

00405 the edge 61, penetrated by the tie rod 33

00406 bore 62 for securing the tie rod 33 in the

00407 toothing engages. By repeatedly stepping down

00408 of the pedal 57, the pull rod 33 and thus the

00409 drive member 32 of the jaw 3 always in direction

00410 step by step to the desired clamping position

00411 relocated. 00412

00413 The drive shown can also by a

00414 push rod acting clamping pieces be formed. 00415

00416 The double pedal arrangement can also

00417 non-prismatic workpieces are clamped, whereby

00418 here by pressing one or the other pedal

00419 57 the jaw 3 along one or the other 00420 Holmes 2 more or less towards the Spannbak-

00421 ke 4 is shifted. Furthermore, the double pedal

00422 arrangement also a uniform, parallel shift

00423 ben the jaw 3 feasible, this by a

00424 joint operation of pedals 57. 00425

00426 The clamping jaw 3 for clamping a small one

00427 workbench only one-sided, d. H. along only

00428 of a spar 2 advanced by means of a pedal 57,

00429 so a clamping force on the workpiece by the

00430 non-return lock 37 of the jaw 3 in the area of

00431 other Holmes 2 supported. The jaw 3 can

00432 accordingly in the area of the other spar 2

00433 chen. A slight drag along in the tensioning direction

00434 gene is also specified, with the pull rod 33

00435 of the associated locking piece 36 ratcheted over. 00436

00437 To move the jaw 3 back again, is the

00438 release lock 37 release. For this, the double

00439 pedal 56 or each individual pedal 57 actuated back,

00440 d. H. dressed. In the simplest way this is

00441 achieved that the foot dives through the gate 58 and

00442 each individual pedal 57 or both pedals 57 at the same time

00443 tig applied from below, which is a rotary displacement

00444 the pivot lever 54 according to arrow b in Fig. 2 for

00445 consequence. This leads to, as shown in Fig. 8

00446 a swivel displacement of the locking piece 72 by means of

00447 take-along over the driving tip 46 of the actuating

00448 bels 44. The edge 61 of the bore 62 is shifted

00449 here from the area of the teeth of the tension

00450 ge 33 and thus gives this back to the

00451 jaw 3 free. 00452

00453 The turning back of the actuating lever 44 for

00454 release of the backstop 37 is by a 00455 strike 63 in the area of the opening 45 of the drive ka00456 least 34 limited. 00457 00458 FIG. 9 shows an alternative embodiment of the drive box 34. Here, for the positioning of the elements to be used - locking piece 36, 00461 locking piece 72 and spring element 42 - instead of integrally formed webs, transverse pins 64 are provided. 00463 00464 The inventive design in a simple 00465 way freehand actuation is ensured when clamping 00466 workpieces, wherein further clamping 00467 prismatic workpieces is permitted. By actuating the double pedal 56 at the same time, the clamping jaw 00469 3 is moved evenly along the two spars 2. 00470 By actuating only one pedal 57, a one-sided displacement of the clamping jaw 3 along a bar 2 00472 can be carried out. 00473 00474 All disclosed features are essential to the invention. 00475 In the disclosure of the application, the 00476 disclosure content of the associated / attached priority documents (copy of the prior application) is also included in full 00478, also for the purpose of including features of these 00479 documents in claims of the present application with 00480. 00481

Claims

00482 CLAIMS 00483 00484 1. Work table (1) with clamping jaws (3, 4) resting on two parallel bars (2) 00485, of which at least 00486 one (3) in the direction of the other clamping jaw (4) 00487 by means of each bar (2 ) assigned and individually operable 00488 drive elements (32) can be moved, 00489 characterized in that the drive elements (32) 00490 each have a step-by-step drive and can be operated by a double lever technology together 00492 or individually. 00493 00494 2. Work table according to claim 1 or in particular according thereto, 00495 characterized in that the drive has a pull or push rod (33) 00497 fastened to the 00496 clamping jaw (3), which by means of pedal-displaceable locking or 00498 clamping pieces (36) is gradually shifted. 00499 00500 3. Work table according to one or more of the preceding00501 claims or in particular according thereto, characterized gekenn00502 in that the clamping or locking drive (35) has a 00503 releasable backstop (37). 00504 00505. Workbench according to one or more of the preceding00506 claims or in particular according thereto, characterized gekenn00507 in that the non-return lock (37) can be released by a pedal actuation. 00509 00510 5. Work table according to one or more of the preceding00511 claims or in particular according thereto, characterized in that 00512 that the latching or clamping piece (36) can be moved by a 00513 actuating lever (44). 00514 00515 6. Workbench according to one or more of the preceding00516 claims or in particular according thereto, characterized 00517 shows that the actuating lever (44) is coupled to the pedal (57) via a driving rod (51). 00519 00520 7. Workbench according to one or more of the preceding00521 claims or in particular according thereto, characterized in that 00522 that the actuating lever (44) for releasing 00523 the non-return lock (37) plunges into a driving opening (38) 00524 of a locking piece (72). 00525 00526 8. Workbench according to one or more of the preceding00527 claims or in particular according thereto, characterized in that 00528 that the double pedal (56) is arranged approximately in the middle 00529 of a traverse (52). 00530 00531 9. Workbench according to one or more of the preceding00532 claims or in particular according thereto, characterized in that the double pedal (56) is 00534. 00535 00536 10. Workbench according to one or more of the preceding00537 claims or in particular according thereto, characterized in that the drive rod (51) sits on one, 00539 on a shaft (53) rotatable by the foot pedal (57) 00540 in the area of a Stand leg (10) arranged 00541 pivot lever (54) is articulated and extends in the U-space 00542 of the leg (10) designed as a U-profile. 00543 00544 11. Workbench according to one or more of the preceding00545 claims or in particular according thereto, characterized in that the clamping or latching drive (35) is arranged approximately in the middle of 00547 the spar, below a floor slide carrier (70) formed by a U-shaped sparpro00548 fil is. 00549 00550 12. Work table according to one or more of the preceding00551 claims or in particular according thereto, characterized 00552 shows that the other clamping jaw (4)

00553 is slidably mounted on the spars (2). 00554

00555 13. Workbench according to one or more of the previous

00556 the claims or in particular according thereto, characterized

00557 shows that one, the other jaw (4) carrying

00558 Spar section (8) can be swiveled up into a 90 ° position

00559 is. 00560

00561 14. Workbench according to one or more of the preceding

00562 according to the claims or in particular according thereto,

00563 shows that the other clamping jaw (4) is in the

00564 pivoted position against the wide surface (30) of the

00565 foot-operated clamping jaw (3) can be adjusted. 00566

00567 15. Workbench according to one or more of the previous

00568 the claims or in particular according thereto, characterized

00569 records that the legs (10, 11) of the work table

00570 (1) are foldable and in the position of use with the

00571 spars (2) are locked.