DE202009001468U1 - Locking and clamping handle with safety device against unintentional locking - Google Patents

Abstract

Locking and clamping handle with protection against accidental locking, which has at its front end a threaded sleeve (12) which is screwed with a threaded bore (24) on the outer circumference of a tube and anchored in this threaded bore (24), wherein in the Screw sleeve (12) a latching pin (3) spring-loaded raised and lowered, which according to the shift position of the knurled handle (1) from the threaded sleeve (12) is pushed out spring loaded, and in the locked state with its front bolt-side end (16) through this Threaded hole (15) passes into a locking hole in an adjusting rail (22), characterized in that
- The knurled handle (1) rotatably connected to the locking pin (3) and the locking pin (3) has a clamping thread (8) which cooperates with an associated thread (19) of the threaded sleeve (12), wherein the locking pin during this threaded engagement not from the screw sleeve (12) can be pulled out,
- That when turning the knurled handle (1), the two threads (8, 19) can be disengaged ...

Description

The Innovation concerns a locking and clamping handle with safety against unintentional locking according to the preamble of the protection claim 1.

at Locking and gripping handles, it is known to use a so-called safety travel limit. Such locking grips are used in a variety of machine applications used. As a particularly obvious embodiment Below is the application of a locking and tensioning handle according to the preamble of the present invention in connection with a fitness device portrayed.

at such fitness equipment Locking and tightening handles are used to, for example an adjusting rail, which can be longitudinally displaced and locked in a tube guided is to be stated. For this purpose, in a manner known per se, the locking and cocking handle used.

at Fitness equipment it is known to such a locking and clamping handle thereby Use the locking and cocking handle on its front End a screw sleeve has, in the spring-loaded latching pin is arranged raised and lowered.

Of the Locking pin is according to the adjustment of a knurled handle either from the screw sleeve spring loaded pushed out and then remains under spring load in sit a detent bore, which is arranged in the adjustment rail is.

As a result, is the locking and clamping handle with its arranged thereon threaded screwed into an associated threaded hole on the outer circumference of the tube and is anchored (positioned) in this threaded hole.

in the locked state then protrudes the aforementioned locking pin his front bolt-side end through this threaded hole and comes in the system in a arranged in the adjustment locking hole.

On this way is the adjustment rail in the pipe against unintentional secured axial adjustment, as long as the locking pin is in locking engagement with the locking hole is located in the adjustment rail.

Now there is a simple embodiment of a Locking and tightening handle, in which only provided that by a pulling force on the knurled handle the locking bolt against its spring load out of engagement with the locking hole is brought in the adjustment rail. However, this is with the serious Disadvantage connected that the adjustment rail unintentionally and under gravity through the tube unsecured falls, so no more Fuse is present.

It It is also known that one wants to prevent one from turning on the knurled handle the screw sleeve could unscrew from the threaded hole in the pipe, so an unintentional Disengaging or pulling out the locking pin from the opposite Reaching the locking hole in the adjustment rail.

This is an undesirable Incorrect operation, which should be prevented in any case. It should So an undesirable Turning the screw sleeve be prevented when at the knurled handle is turned.

Here There is a first known embodiment in the prior art the company Kipp, which has a locking and clamping handle suggests the one safety-limit having.

at This safety travel limit is prevented when turning on the knurled handle the screw sleeve illegally is unscrewed from the threaded hole in the pipe. This will be done achieved that the seated on the threaded hole nut a Has Wegbegrenzung by in the threaded area between the internal thread the nut and the external thread the screw sleeve a transverse pin is arranged.

At the Unscrew the threaded sleeve in the fixed nut can therefore only a certain Schraubweg traveled become. The screw is however dimensioned so that when measuring This screw is ensured that the at the front end arranged locking pin, which protrudes axially from the screw sleeve to the front, not except Engaging with the opposite Rest hole can be brought in the adjustment rail.

disadvantage However, this arrangement is that an additional element in the form of a nut is needed with a seated transverse pin. Furthermore, the production relatively difficult, because you are from a mother through the outside must use a cross pin, which engages in the thread.

Above all, the positioning of the screw is difficult, ie the locking of the clamping mechanism of this locking and clamping handle is relatively expensive to solve, because the mother to the pipe in any way by welding or other means must be secured in position and in a precise axial Position aligned must be to ensure the function of engagement of the locking pin in the locking hole of the adjusting rail.

Of the Innovation is therefore the object of a locking and Tightening handle of the type mentioned in such a way that on the welding a foreign part of a pipe or other machine part can be dispensed with and that all parts themselves integrated on the locking and clamping handle are arranged.

Further the innovation is based on the task of securing against unintentional Unlock in the locking and clamping handle to arrange yourself, without that it is outboard Connections to the associated Machine part needed.

to solution the task is the innovation by the technical teaching of claim 1.

essential Feature of the innovation is that the knurled grip against rotation with the Locking pin is connected and the locking pin has an external clamping thread, which cooperates with an associated internal thread of the screw, that further in the region of the screw sleeve surrounding the detent pin Compression spring is present, with one end at the top the screw sleeve and supported at the other end to a stop collar of the locking pin and this locking pin spring loaded in its advanced position that holds further at the front, lower end of the locking pin in the diameter extended clamping collar is arranged, which has an axial clamping shoulder forms, with which the locking pin for clamping attachment to the outer periphery the adjusting rail can be brought to bear.

With the given technical teaching gives the essential advantage that now all elements of the fuse against unintentional unlocking in the locking and Tensioning handle are arranged themselves, without this being an external one Mother requires, with elaborate measures on the machine part itself must be determined.

Important with the innovation is therefore that preferred in the upper range the locking sleeve the previously specified clamping thread is arranged, which is spring-biased cooperates with the associated internal thread of the screw.

The following safety function is now fulfilled:

In the locked state of the clamping pin engages with its front end of the bolt as intended in the associated locking hole in the adjustment rail. Furthermore, this is the aforementioned clamping collar with its axial clamping shoulder clamped on the outer circumference of the adjusting rail, so that the locking pin engages without play in the locking hole in the adjustment and thus positioned and clamped.

in this connection It is assumed that the screw sleeve of the locking and tensioning handle screwed into an assigned threaded hole in the pipe and positioned is.

Becomes now pulled in the axial direction on the knurled handle, then nothing happens, because the clamping thread of the locking pin still in threaded engagement with the associated internal thread on the Detent sleeve is located.

It can now be a first transitional position only be achieved by first the knurled handle in the direction of his Open position is rotated so as to tighten the clamping pin of the locking pin out of engagement with the female thread located at the upper end of the screw sleeve bring to.

This is a first intermediate position, which ensures that the clamping pin with its front bolt end only partially out of engagement with the detent bore the adjusting rail passes.

Here Although then the clamping between the outer tube and the solved lying inside adjustment rail, nevertheless is not yet the dowel pin with its bolt end out of engagement with the locking hole in the adjustment rail.

This is a safety position or intermediate position that the clamping engagement picks up, but not yet the assignment between the adjustment rail and the tube in which the locking and clamping handle is screwed is.

In Another position is the further rotation of the knurled handle the clamping thread disengaged brought with the internal thread of the screw, so that the two Thread are no longer engaged. When tightening results this is a rattling noise, because the lower thread of the clamping thread on the upper thread the internal thread of the screw spring loaded seated and this revolves, without it to a Thread engagement comes. The two threads turn so empty. In this position, when the rattling sound is audible, the knurled handle can now - because the two threads except Are engaged - in pulled out in the axial direction against the force of the helical compression spring become. Because the locking pin is rotatably connected to the knurled handle, Thus, the bolt end of the locking pin out of engagement with the locking hole be brought in the adjustment rail.

Of the So called safety mechanism is based on the fact that with the Locking pin and the associated clamping collar snapped and clamped and that when canceling the clamping connection of the locking pin still engaged remains in the adjusting rail with the locking hole and only afterwards a pull on the knurled handle exerted in the axial direction can be so as to disengage the detent pin with the detent bore bring to.

One further twisting of the knurled handle leads to none further axial movement of the locking pin, so after this second Position the transition in the third position only succeed if with the hand on the knurled is pulled in the axial direction against the force of the helical compression spring.

This is a significant advantage over the prior art, because there is no safety road limit required because the Safety road boundary according to the present invention by unscrewing the clamping thread is made from the internal thread of the screw, without it being a complicated to mount cross pin requirement.

Another Advantage of the invention is that all parts for positioning now are arranged on the locking and clamping handle itself and there is none further rotationally fixed attachment to the tube requires, as it stood the technique is required.

It Although in the context of the present innovation, the screw in the execution described that they have an external thread with which they are in an associated internal thread (threaded hole) can be screwed to the pipe. This is the invention but not limited. Instead of an external thread on the screw sleeve can also be used a different attachment, such. B. a firm welding of the threaded or a clamping of the screw on an associated bore of the pipe.

Therefore is the external thread the screw sleeve only as an exemplary embodiment to understand, because also other fasteners in the context of present invention be claimed as essential to the invention.

Of the Subject of the present innovation does not arise only from the subject of the individual claims, but also from the combination the individual protection claims among themselves.

All in the documents, including Summary of information and features, in particular the spatial training shown in the drawings as claimed essential to the invention, as far as they individually or in Combination opposite the prior art are new.

in the The following is the innovation of only one execution way illustrative drawings closer explained. Here are more from the drawings and their description essential features and benefits of the innovation.

It demonstrate:

1 : Side view of the locking and clamping handle in the disengaged state

2 : The same representation of the locking and clamping handle in the locked state

3 : The same presentation as 1 and 2 in the tensioned and locked state

4 : A cross section through the illustration in 3 along the line AA

5 : The cocked and locked position of the locking and clamping handle according to 3 and 4 between a pipe and a displaceable rail arranged therein

6 : The relaxed, but latched position of the locking and clamping handle according to 2

7 : The disengaged and relaxed position of the locking and clamping handle according to 1

In the 1 to 4 is generally a knurled handle 4 shown, with an upper end cap 2 is covered.

In its interior is a detent pin 3 rotatably and secured against axial displacement added, in which on the outer circumference of the locking pin 3 a fir tree-like toothing is arranged, which in the associated, made of plastic inner bore of the knurled handle in the region of the covenant 7 occurred, so that the two parts are rotationally fixed and secured against axial displacement associated with each other.

To additionally secure the non-rotatable connection is in the area of the federal a hexagon 6 used a cross pin 5 carries, which the torque of the locking pin 3 on the hexagon 6 and thus on the federal government 7 of the knurled handle 1 transfers.

It is important now that the locking pin 3 at his out of the bunch 7 out looking end a tension thread 8th carries, which with a zugeord Neten inwardly directed internal thread 19 a screw sleeve 12 combs.

The screw is thus with its internal thread 19 on the clamping thread 8th the locking pin 3 screwed.

The detent pin 3 sits down in a bunch 9 reduced diameter, thus forming an interior space, which is of a compression spring 10 is filled. The compression spring 10 lies with its upper end at an upper stop shoulder 20 in the area of the federal government 9 while the lower end of the helical compression spring 10 at a stop collar 11 in the area of the locking pin 3 is applied. The compression spring 10 So it is in the range between the inner circumference of the screw 12 and the outer periphery of the locking pin 3 arranged and tightened the locking pin 3 with his bolt end 16 in the direction of the arrow 28 continued.

The screw sleeve 12 carries at its upper end a hexagon 13 , the material integral with the screw 12 connected is. This hexagon 13 has the purpose of the screw sleeve 12 for example, in the in the 5 to 7 shown threaded hole 24 to position. For this purpose, the screw is at its outer periphery with a positioning thread 15 equipped, on the additionally a threaded nut 14 is mounted rotatably for securing.

The tension of an object is now achieved by the front end of the bolt 16 the locking pin 3 a tension collar 26 enlarged diameter, which has an axial clamping shoulder 17 formed.

In front of this tension shoulder 17 then extends the bolt end 16 with reduced diameter, which is suitable, in an associated detent hole 27 z. B. in the range of an adjustment 22 to be engageable.

The 5 to 7 now show the functions of the previously described parts.

In the 5 is shown that the bolt end 16 in full length in the detent hole 27 an adjusting rail engages and at the same time also the tension belt 26 with its front, axial shoulder 17 the pipe 21 against the adjustment rail 22 presses to connect the two parts backlash. Here is as attachment - in deviation to the 1 to 4 - for the screw sleeve 12 suggested that the nut 14 omitted and the positioning thread 15 directly into the threaded hole 24 in the pipe 21 is screwed.

For positioning, a spacer ring 25 used, which is loosely pushed and not in threaded engagement with the positioning thread 15 the screw sleeve 12 have to be.

The length of the spacer ring 25 is chosen so that it is ensured that the clamping and locking function is ensured, ie in this position must also the tension belt 26 exciting on the outer circumference of the adjustment rail 22 abut, and that's the pipe 21 to the adjustment rail 22 correctly positioned and clamped, as shown in 3 and 4 is shown.

Now this positioning and clamping between pipe 21 and adjustment rail 22 be lifted, with the aim that the adjustment rail in the direction of arrow 23 out of the pipe 21 is pulled out, first the intermediate position after 6 (please refer 2 ) used. It is therefore initially as long as the knurled handle 1 turned counterclockwise until the clamping collar 26 in his position 26 ' passes over and thus from the outer circumference of the adjusting rail 22 takes off. Furthermore, when turning the knurled handle, the clamping thread 8th from the internal thread of the screw 19 unscrewed, so that also the bolt end 16 from the locking hole 27 moved back, but not completely out of the detent hole disengaged.

In this intermediate position so is a relaxed, but secured position of the adjustment 22 in relation to the pipe 21 in front.

To accomplish the safety function is according to 7 provided that in another turn of the knurled handle 1 counterclockwise the clamping thread 8th out of engagement with the internal thread 19 the clamping sleeve 12 comes and the aforementioned rattling noise occurs.

Thus, the clamping thread 8th the locking pin 3 out of engagement with the internal thread 19 the screw sleeve 12 , and the two parts are still pulled against each other by the compression spring.

Now only to disengage the bolt end 16 from the locking hole 27 the knurled handle in the opposite direction to the arrow 28 against the force of the compression spring 10 pulled up so as to the bolt end in the position 16 '' to bring, while at the same time the clamping collar in the position 26 '' is brought. This is the bolt end 16 behind the front 18 the screw sleeve 12 retracted, as this is best in 1 is shown.

In the 7 shown position therefore corresponds to the position in 1 ,

1

knurled

2

protective cap

3

Plunger

4

gearing

5

cross pin

6

hexagon

7

Federation

8th

Tensioning thread (locking pin 3 )

9

Federation

10

compression spring

11

stop collar

12

threaded

13

hexagon

14

threaded nut

15

Positioniergewinde

16 16 ', 16' '

Bolt end (locking pin 3 )

17

clamping shoulder

18

front

19

Internal thread (screw sleeve 12 )

20

stop switch

21

pipe

22

adjusting rail

23

arrow

24

Threaded hole (pipe 21 )

25

spacer

26 26 ', 26' '

strap

Claims (7)

Locking and clamping handle with safety device against accidental locking, which at its front end a screw ( 12 ), which with a threaded bore ( 24 ) screwed on the outer circumference of a pipe and in this threaded hole ( 24 ) is anchored (positioned), wherein in the threaded sleeve ( 12 ) a locking pin ( 3 ) is arranged spring-loaded raised and lowered, according to the shift position of the knurled handle ( 1 ) from the screw sleeve ( 12 ) is pushed out spring-loaded, and in the locked state with its front bolt-side end ( 16 ) through this threaded hole ( 15 ) through in a locking hole in a displacement rail ( 22 ), characterized in that - the knurled handle ( 1 ) rotatably with the locking pin ( 3 ) and the detent pin ( 3 ) a clamping thread ( 8th ), which with an associated thread ( 19 ) of the screw sleeve ( 12 ) cooperates, wherein the locking pin during this threaded engagement not from the threaded sleeve ( 12 ) is pulled out, - that when turning the knurled handle ( 1 ) the two threads ( 8th . 19 ) are disengageable and spring loaded lie on each other, resulting in a ratcheting noise, and in this position the locking pin ( 3 ) is displaceable in the axial direction by pulling on the knurled handle, - and that a locking pin ( 3 ) in the axial direction biasing compression spring ( 10 ) is present, which the locking pin ( 3 ) holds spring-loaded in its advanced position. Locking and clamping handle according to claim 1, characterized in that at the front, lower end of the locking pin an enlarged diameter clamping collar ( 26 ), which has an axial clamping shoulder ( 17 ), with which the locking pin ( 3 ) relative to the system to be clamped on the outer circumference of the adjusting rail ( 22 ) Can be brought to the plant. Locking and clamping handle according to claim 1 or 2, characterized in that the detent pin ( 3 ) an external clamping thread ( 8th ), which with an associated internal thread ( 19 ) of the screw sleeve ( 12 ) cooperates. Locking and clamping handle according to one of claims 1 to 3, characterized in that in the region of the threaded sleeve ( 12 ) which the locking pin ( 3 ) surrounding compression spring ( 10 ) with one end at the upper end of the screw ( 12 ) and with the other end at a stop collar ( 11 ) of the locking pin ( 3 ) and this locking pin ( 3 ) holds spring-loaded in its advanced position. Locking and clamping handle according to one of claims 1 to 4, characterized in that preferably in the upper region of the threaded sleeve ( 12 ) the tension thread ( 8th ) is arranged, which is spring-biased with the associated internal thread ( 19 ) of the screw sleeve ( 12 ) works together. Locking and clamping handle according to one of claims 1 to 5, characterized in that the clamping collar ( 26 ) with its axial clamping shoulder ( 17 ) clamped on the outer circumference of the adjustment rail ( 22 ), so that the detent pin ( 3 ) without play in the locking hole in the adjustment rail ( 22 ) and thus positioned and clamped. Locking and clamping handle according to one of claims 1 to 6, characterized in that first the knurled handle ( 1 ) is rotated in the direction of its open position, so as to tighten the clamping thread ( 4 ) of the locking pin out of engagement with the at the upper end of the threaded sleeve ( 12 ) to bring internal threads.