FI92351B - Swivel arm assembly - Google Patents

Description

92351 Swivel arm device. - Administrative measures.

The present invention relates to a pivot arm device according to claim 1.

Such hitherto known swivel arm devices are mounted on a table with a clamp holder. They have a free end at the free end of the pivot arm, e.g. a support plate, on which, for example, an image surface is arranged. In this known pivot arm device, the pivot arm can be freely pivoted about the axis of the rotary bearing. In this case, there is a risk that the table may fall when the arm is placed unfavorably with its image surfaces. This danger is especially great when moving a relatively small table with a heavy object on the base of the shaft. Likewise, the pivot arm can swing uncontrollably and create dangerous situations.

It is an object of the present invention to provide such a pivot arm device in such a way that uncontrolled rotational movements are reliably prevented.

With the swivel arm device according to the invention, this task is solved according to the characterizing part of claim 1.

In an embodiment according to the invention, the pivot arm with the stop can be locked in position, i.e. the movement of the arm can be limited. Thus, it is possible to limit the pivot angle of the arm to a safe area, e.g. by adjusting the rocking motion so that the arm does not cross the edge of the table. This will certainly prevent the table from tipping over under the arm, especially when moving.

Other features of the invention will be apparent from the following claims, description, and drawings.

2 92351

The invention is explained in more detail below with reference to the accompanying drawings, in which:

Figure 1 shows a pivot arm device according to the invention with its stops and brackets, partly on the sides and partly in a vertical view.

Fig. 2 shows a top view of the pivot arm device according to Fig. 1.

Figures 3 and 4 show another embodiment of a pivot arm device according to the invention with a different type of carrier from the side and from above.

Figures 5 and 6 show another pivot arm device according to the invention in the figures of Figures 3 and 4.

Figure 7 shows a part of a pivot arm device according to the invention, partly in side view and partly in vertical view.

Fig. 8 shows the pivot bearing of the pivot arm device according to Fig. 7 in section along the line VIII-VIII in Fig. 7.

* Figs. 9-15 show the bearing according to Fig. 8 in different rotational positions of the arm of the arm device.

Figures 16 and 17 show another embodiment of a pivot arm device according to the invention according to Figure 1.

The pivot arm device according to Figs. 1 and 2 has a pivot arm 1, to the free end of which a bracket 2 is attached. It has, for example, a computer display terminal or the like attached. With the pivot arm, a person sitting at a desk 11 3 92351 can in any case obtain an object in the support 2, such as a picture surface, a telephone, etc., in a suitable position by turning the pivot arm about its axis.

Only with the stop 3 shown in principle can the pivot arm 1 be clamped to the desk. The pivot arm can be rotated by means of a rotating bearing 4 relative to a stop 3 or a desk fixed to the desk. The pivot bearing 4 according to Figures 1 and 2 has outer and inner sleeves 5 and 6 and a bearing pin 7 on which the inner sleeve is rotatably mounted.

The outer sleeve 5 is closed at its upper and lower ends by a closing plate or plates 8 and 9. The rotating bearing 4 together with the closing plate 9 is in an annular shoulder 10 at the upper end of the second outer sleeve 11, which outer sleeve 11 is arranged above the lower outer sleeve 12. It is in turn fastened to the detent 3 by spaced-apart adjacent screws 13a, 13b (cf. also Fig. 7). As further shown in Fig. 7, the outer sleeves 11 and 12 are further connected to each other by screws 13c. The outer sleeve 11 is fixedly connected by screws 13c. The outer sleeve 11 is fixedly connected by screws 14, 15 to the closing plate 9, which in turn is screwed to the bearing pin 7.

The bearing pin 7 is surrounded at both ends by bearing rings 16, • 17 which, with their sides turned away, form a rectangular outwardly directed flange 18, 19. The bearing rings 16, 17 are flanged 18, 19 on the end faces 20, 21 of the inner sleeve 6 and the inner and outer sleeves 5 and 6 and their with the pivot arms are rotatable relative to the bearing pin 7 in each case. toasentoon. The inner sleeve 6 is preferably pressed into the outer sleeve * '5.

The pivot arm 1 preferably consists of two arm parts 1 'and 1 "of the same length. The arm part 1" supports a support 2 at its end remote from the bearing 4. It rotates through a pivot joint 23 relative to the arm part 1 ". The arm parts 1' and 1" are connected to each other - their double hinges 24 formed by two articulated sleeves 25 and 26. Their articulated shafts A 'and A "are parallel to each other and connected by connecting flanges 27, 28. The double hinge 24 allows the arm parts 1' and 1" to be moved so that the image surface or support 2 can rotate about both the pivot axis A of the pivot bearing 4 and the shafts A 'and A "of the pivot sleeves 23, 26.

Thus, the bracket 2 can be moved from its extended position close to the bearing 4. Thanks to the double joint 24, the arm parts 1 'and 1 "can be rotated opposite each other so that they are completely adjacent. In addition, the bracket 2 can be rotated about the axis of the hinge 23. any time.

As shown in Figs. 3 and 4, instead of the plate-like bracket according to Figs. 1 and 2, a frame-like bracket 2a can be used, which is fixed to the bearing 23a by arm parts 1a 'and 1a ". The bracket 2a can be further rotated around the joint 23a.

These adjustment and tilting possibilities also appear in Figures 5 and 6, in addition to which a second support 2b can be connected to the support 2b provided with the swivel joint 23b. The support 2b can act as a concept holder or light, for example. The support 2b is connected by a pivot joint 23b and a second pivot sleeve 31 to two arm portions 33 and 34 forming a second pivot arm and by a double joint 24b and a pivot joint 32 to a stem portion Ib "corresponding to the arm portions 1" and 1a "of Figures 1-3. with a double joint 30 and is fixed to the arm part 33. The joint sleeve 31 is between the upper and lower joint sleeves 31a and 31b, between which the joint sleeve 31 is mounted

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5 92351 rotatably about an axis 31c. The articulated sleeves 23b, 31a and 31b are connected to each other by flanges 30a and 30b, whereby a bracket 2b 'is attached to the upper flange 30a. The articulated sleeve 31 may also be formed similar to the articulated sleeve forming the joint 23b, whereby the support arms 33 and 34 are also substantially similar to the arm portions Ib "of the first pivot arm Ib". The arm portion 33 is connected by a double joint 24b to the arm portion 34 at the free end The double joint 24b is formed similarly to the double joint 24 according to Figures 1 and 2. An adjusting device 29b is provided for adjusting the inclination of the support 2b '.

Instead of the single joint 32 of the arm part 34, a double joint (not shown) corresponding to the double joints 24 and 24b can also be used. In such a double joint, the articulated sleeve is connected to a bracket 2b 'and the second articulated sleeve to another bracket (not shown) or bearing, for example for a cap holder, lamp, etc., so that the bracket 2b' and the bearing can be moved independently of each other.

In the embodiment according to Figures 1 and 2, the pivot arm · is arranged relatively far above the stop 3, because there are outer sleeves 11 and 12 between it and the bearing 4. This distance can be further increased by arranging further outer sleeves between the stop 3 and the rotary bearing 4. Correspondingly, the distance between the stop 3 and the bearing 4 can also be reduced when, for example, only the outer sleeve 11 or 12 is used. In the simplest case, the bearing 4 is arranged immediately in the stop 3 so that the pivot arm can be moved tightly on the desk.

In order to limit the rotational movement of the pivot arm 1, 6 92351 is a counter-device arranged on about half the length of the pivot bearing 4. It preferably has two abutments 35 and 36 arranged adjustably on the bearing pin 7. These abutment surfaces 35, 36 are arranged according to the abutment surfaces 37 and 38 of the inner sleeve 6 (Figures 8 to 15). The abutment surfaces consist of radial walls of the circumferential groove 44 of the inner surface of the sleeve 6. The abutment surfaces 35 and 36 are preferably formed as threaded pins in the threaded holes 41, 42 of the bearing pin 7. The threaded bore 41, 42 and the abutment surfaces 35, 36 are preferably perpendicular to each other in intersecting planes. The length of the abutments 35, 36 is preferably slightly smaller than the outer diameter of the bearing pin 7 so that both can be screwed onto the lowered surface relative to the bearing pin (Fig. 10). In this position, the pivot arm 1 can be rotated 360 °, whereby the pivot arm with its inner and outer sleeves 6 and 5 can be rotated around the bearing pin 7 in both directions of rotation P and P1.

However, the abutment surfaces can be rotated as such or on the surfaces passing over the bearing pin 7 so that their ends are out above the bearing pin (Figs. 8, 9, 11-15). In order to adjust the abutment surfaces in such a position, the inner sleeve 5 has an outlet opening 43 and an opposite circumferential groove 44. The outer sleeve 5 is provided with two, preferably rectangular, openings 49, 50 through which a socket wrench, screwdriver or the like 43 can be inserted to adjust the abutments 35, 36. the free size is only slightly larger than the outer diameter of the abutment 35 so that it can be screwed into the opening 43 at its end 45 away from the stem part 1 '.

It then rests on the wall 39 of the opening 43 (Fig. 9 "). In this position, the pivot arm 1 is secured against rotation in both directions P, P 'so that the pivot arm is locked relative to the table.

The length of the circumferential groove 44 is a little over 180 °. In the axial direction of the bearing pin 7 • · 92351 7, the circumferential groove 44 extends over at least the height of each of the holes 41 and 42 (Fig. 7) so that both abutment surfaces 35, 36 can move simultaneously in their outwardly opposing position (Figs. 14, 15).

To rotate the holes 41, 42, each abutment surface 35, 36 is formed as a socket screw into which the user can insert a socket wrench or the like to rotate the pivot arm I. In order to place the tool externally on the respective stop, the pivot arm 1 is rotated so that the abutment surfaces 35, 36 are , 50 area. These openings 49, 40 are in place in the initial position of the pivot arm 1 according to Fig. 9, where it can be locked by a stop 355, an opening 43 and a groove 44.

If the pivot arm 1 has to be moved from this initial and locking position, the mating surface 35 must first be screwed back into the hole 41. Thereafter, the pivot arm 1 with its sleeves 5, 6 can be rotated freely around the bearing pin 7. To limit the rotational movement of the pivot arm 1, either the abutment surface 35 can be rotated in the opposite direction (arrow X) in Fig. 9 and / or the abutment surface 36 to one side or the other over the bearing pin 7 so that the abutment surfaces 35, 36 assume the position of Figs.

If the contact surface 35 is rotated in the arrow X direction of Figure II to the position where it comes into the groove 44, to pivot the arm 1 to rotate - the handle shown in Figures 9-15 only the arm 1 '- clockwise and vice versa at 90 ° until the contact surface 35 comes into contact with front edge 51 of the inner sleeve 6 the counter surface 37 or 38. The second abutment surface 37 is then covered by the bearing pin 7.

As a whole, the pivot arm 1 can be rotated 180 ° to the right or left from its initial or central position according to Fig. 11.

• «8 92351

The second rotational position device is that the abutment surface 35 in its initial position is rotated back according to Fig. 8, 10 and then the second abutment surface 36 is rotated outwards over the appropriate thread 42 in the position shown in Fig. 12. Now the pivot arm 1 is rotated so that the opening 49 of the outer sleeve 5 is aligned with the abutment surface 35. In this position, the second opening 50 of the outer sleeve 5 is aligned with the abutment surface 36 so that it can be screwed into the described position with a key. Since the opening 50 is in this position close to the abutment surface 38, the abutment surface 36 is adjacent to the abutment surface 38 after unscrewing (Fig. 12). From this starting position, the sleeve 5, 6 can be rotated 180 ° clockwise with the pivot arm 1 (arrow P) until the abutment surface 36 contacts the second abutment surface 37.

The rotational movement of the pivot arm 1 can also be limited in another 180 ° range. To this end, when the pivot arm 1 is in the position according to Fig. 10, the abutment surface 36 is screwed through the opening 50 to the position shown in Fig. 13. The end 52 extending over the bearing pin 7 of the abutment surface 36 is then just adjacent to the abutment surface 37. position shown in Figure 13 may pivot arm 1 with the bush 5, 6 rotate the direction of the arrow P 'in the direction of 180 °, until it comes into contact with the counter surface 38.

The rotation area of the pivot arm 1 can thus be limited to 180 ° by simply adjusting the abutment surface 36, whereby two different 180 ° zones can be limited outside the rotation area, depending on the position of the abutment surface 36. In either case (Figures 12 and 13), the second abutment surface 35 is completely lower in the bearing pin 7, i.e. inoperative.

Finally, it is possible to adjust the mating surfaces 35, 36 so that they both extend outwards over the bearing pin 7 into the groove 44 (Figs. 14 and 15). Then the angle of rotation of the pivot arm 1 * · 9 92351 is limited to 90 °, whereby the possible direction of rotation depends on which side of the bearing pin 7 the abutment surface 36 is on.

In order to adjust the abutment surface 35, the sleeves 5, 6 must be brought into the position according to Fig. 10, so that the abutment surface 35 can be operated through the opening 49. It is then screwed into the groove 44.

In addition, the second abutment surface 36 is adjusted to the position of Fig. 14 or 15 through the opening 50 as described. When the contact surface 36 comes into the position shown in Figure 14, it can swing arm 1 to rotate the bush 5, 6 of the arrow P of 90 ° counter-clockwise until the mating surface 37 contacts the mating surface 35. It can be rotated in the opposite direction (arrow P 'in Figure 15) when the mating surface 36 will face one direction over bearing pin 7.

The pivot arm 1 can, of course, be rotated clockwise or counterclockwise between the respective abutment surfaces with the described adjustments.

Contrary to the embodiment shown, the abutment surfaces 35, 36 can also be arranged differently from one another so that the second angle is limited to a reading of 90 °. Other counterparts formed as threaded pins can also be used if more pre-adjustment options are desired.

With the described adjustment possibilities, it is possible to limit the rotation area of the pivot arm 1 to the most advantageous in each case or even to exclude the possibility of rotation (Fig. 9) when, for example, a table to which the pivot arm and its image surfaces are attached must be moved or adjusted. This will certainly prevent the table from tipping over.

The pivot arm device according to Fig. 16 differs substantially from the pivot arm device according to Fig. 1 in that two pivot arms are axially superimposed on each other.

10 92351

The upper pivot arm le is formed similarly to the pivot arm according to Fig. 1. It also has two interconnected shank portions le 'and le "connected to each other by a double joint 24c. In addition, integral with Fig. 1, the shank portion le' is attached to a pivot bearing 4c, an outer sleeve 5c and a stop 3c, the pivot bearing 4c largely corresponding to the pivot of Fig. 1. 4. As in the support arm 1 "of Fig. 1, a pivot joint 23c is provided on the free end 22c of the arm part le, on which the support 2c is arranged. The sleeve 5c, like the sleeve 5, is rotatably attached to the bearing pin 7c by means of the inner sleeve 6c. It is secured vertically up by the closing plate 8c and down by the radial ring 55 of the bearing pin 7c.

Below the pivot arm le, a second pivot arm 56 is attached to the pivoting stop 3c or i.e. to the pivot bearing 4c. The pivot arm is substantially similar to the pivot arm according to Figs. It likewise has two shank parts 57, 58 of equal length, which, however, are substantially longer than the shank parts 33, 34 of Figures 5 and 6. The shank part 57 extends from the pivot bearing 4c about half the length of the pivot arm le shank le "about it." 33, 34 are connected to each other by a double joint 59. Like the support arm 34, a support 60, which may have, for example, a concept holder, a lamp or a telephone, is rotatably attached to the free end of the arm part 58. To adjust the inclination of the support 60, an adjusting device 62 corresponding to FIG. .

The pivot arm 56 is attached at its end remote from the double joint 59 to an outer sleeve 63 corresponding to the outer sleeve 5c. The outer sleeve 63 is located in the inner sleeve 64 arranged on the bearing pin 7c. The sleeves 63, 64 li • · 11 92351 rest on the lower sleeves 11c and 12c according to the sleeves 5, 6 of Fig. 1. The sleeve 12c rests on the stop 3c like a sleeve 12 and is screwed to it by screws 65, 66. The sleeve 11c is connected by screws 67, 68 to the bearing pin 7c, whereby the free ends of the screws are screwed to the sealing plate 9c screwed to the bearing pin 7c.

Otherwise, the rotary bearing 4c corresponds to the rotary bearing 4 according to Figs.

The rotational movement of the pivot arms le, 56 is, like the pivot arm 1, limited by a mating device corresponding to the counterpart of Figures 7-15. Each pivot arm is provided with a mating device about half the length of the sleeves 5c and 63. Mating devices formed in the same way consist, as previously described, preferably of two mating surfaces 70 and 71 or 72 and 73 arranged on the adjustable bearing pin 7c. The abutment surfaces formed as threaded pins are arranged (not shown in more detail) on the abutment surfaces of the grooves 74, 75 of the sleeves 5c and 63. The abutments and abutment surfaces are formed in the same way as the abutment devices according to Fig. 7. In order to adjust the abutment surfaces 70-73, mutually matching openings 76, 77 are provided in the inner and outer sleeves 6c, 64 and 5c, 54, as in the embodiment of Fig. 7. Thus, each pivot arm le and 56 can be rotated on different abutment surfaces depending on Figs. , how the mating surfaces 70 to 73 are adjusted.

The bearing pin 7c differs from the bearing pin 7 substantially in that the bearing pin 7c extends over each sleeve 5c and 63 and has a ring 55 on its side length. The inner sleeves 6c and 64 rest on it with their opposite end faces 80 and 81.

If the pivot arm 56 is not required, it can be easily removed by removing the outer sleeve 63 with its inner sleeves 64 bearing silicon 7c and replacing it with an empty sleeve 63d (Fig. 17). The abutment surfaces 72d, 73d are then lowered into the respective holes 82 and 83 in the lower section 84 of the bearing pin 7d. In this case, the outer sleeve 12c according to Fig. 16 can also be omitted so that the distance of the pivot arm Id from the stop 3c is small. In this embodiment, the sleeve 11d is immediately attached to the detent 3d and the cover plate 9d. 1 • ·

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Claims (12)

13 92351 A pivot arm device comprising at least one pivot arm having a holder for attaching furniture and a bracket arranged on the support arm and a pivot bearing, the pivot bearing having an adjustable stop for limiting the rotation of the pivot arm and preventing rotation, cooperating with at least one counter-stop, that the stop is formed by means of at least two stop pins (35, 36; 70-73; 72d, 73d) arranged at an angle to each other in the pivot bearing (4; 4a; 4c), which pins are adjustable to limit the stop position of the pivot arm (1; 1b; 1c; Id) from the position in which they are recessed in the bearing part (7; 7c; 7d) of the pivot bearing (4; 4a; 4c) to the abutment position in which they protrude from the bearing part (7; 7c; 7d). Swivel arm device according to Claim 1, characterized in that the stop pins (35, 36; 70-73; 72d, 73d) are provided with a thread. Swivel arm device according to Claim 1 or 2, characterized in that the stop pins (35, 36; 70-73; 72d, 73d) are in the free position inside the outer circumference of the bearing part (7; 7c; 7d) formed as a pin. Swivel arm device according to one of Claims 1 to 3, characterized in that the stop pins (35, 36; 70-73; 72d, 73d) are arranged in overlapping bearing openings (41, 42, 82, 83) in the bearing part (7; 7c; 7d). . Swivel arm device according to one of Claims 1 to 4, characterized in that the bearing part (7; 7c; 7d) is surrounded by a sleeve (6; 6c) rotatably arranged around the bearing part and having mating elements (37, 38). 1 4 92551 Swivel arm device according to Claim 5, characterized in that the abutments (37, 38) are formed by the end walls of the groove (44; 74), preferably the circumferential groove of the sleeve (6; 6c), which groove extends over an angular range of approximately 180 °. . Swivel arm device according to one of Claims 1 to 6, characterized in that one stop pin (35) extends in its latch position to prevent the sleeve (6; 6c) from rotating freely in the opening (43) of the sleeve (6; 6c). Swivel arm device according to one of Claims 1 to 7, characterized in that the length of the abutment pins (35, 36; 70 to 73; 72d, 73d) which are approximately identical is at most equal to the diameter of the bearing part (7; 7c, 7d). Swivel arm device according to one of Claims 1 to 8, characterized in that the swivel bearing (4; 4c) is connected to the holder (3; 3c; 3d) by fitting at least (1), preferably several, overlapping outer sleeves (11, 12; 11c). 12c; 11d, 63d). Swivel arm device according to one of Claims 1 to 9, characterized in that at least two pivot arms (1c, 65) which are arranged one on top of the other and which are rotationally limited in the direction of rotation are arranged, which are preferably interdependent. inversely limited in the direction of inversion. Swivel arm device according to Claim 10, characterized in that the swivel arms (1c, 65) have superimposed outer and inner sleeves (5c, 63) and (6c, 64) in a pin-like bearing part (7c) of the swivel bearing (4c) with an annular portion (55) between the sleeves (5c, 6c; 63, 64) of the pivot arms (1c, 65). li 1 5 92551 Swivel arm device according to Claim 10 or 11, characterized in that the parts of the bearing pin (7c) above and below the ring part (55) are in each case provided with at least one adjustable stop (70-73) on which at least one counter-bearing of the swivel bearing (4c) is arranged. . 92351 16