SE444258B - BALANCING DEVICE AT WORK TABLE, PREFERRED RISING TABLE - Google Patents

Description

to execute the adjustment.

It is also known to place the gas spring or gas springs in different fixed positions along said lever in order to thus obtain different moments from the gas springs. The upper end of the gas spring has then been articulated in one of several holes T mentioned arm and its lower end is fixed in a corresponding hole in an identical series of holes in the drawing board stand. In this way, the rotating center of the heat exchanger can be moved in parallel in the stand of the drawing table and in this way the desired torque can be achieved from the gas spring or the spring springs. However, this movement of the gas springs is imperfect as one has to change the position of both the upper and lower mounting of the gas spring or gas springs. Then one xanlíqtvís must try si? In order to find the right position for a satisfactory balancing of the drawing board, the position of the gas springs often has to be changed several times. Since the position of the gas springs in existing high series is not forcibly controlled, it is also usually easy to attach the nisstaç.

F »one or more of the qas springs in the wrong hole at the rltbordens s 1 f? , + The person working at the drawing board may not notice ao .a immediately if the correct balancing has still been achieved, the incorrectly attached qasrjädern limits the vertical movement of the drawing board cñ that the drawing board does not get the function set aside. In order to be able to move the gas springs in the said series, they must be arranged in parallel, which means manufacturing difficulties and the parallel movement of the springs sometimes also complicates a suitable installation thereof.

The object of the present invention is to eliminate the said difficulties and, in the case of an arrangement of initially stated grouse with simple means, to provide an arrangement which is concealed from several points of view, which primarily eliminates elites in each case to a great extent eliminates the risk of misalignment. can be performed quickly and easily. Sessa and other vehicles are achieved by the object of the invention showing the features which appear from the following patent claims L.

The object of the invention will be described below in more detail with reference to the accompanying drawing, in which Figure 1 illustrates with a side view a drawing table with a device according to the invention; Figure 2 is a side view on a larger scale than Figure 1 of an upper fastening device for a spring device included in the device according to Figure 1; and Figure 3 illustrates a section of a lower fastening device Sö:} af A M: ï _ NV, -__ eeennnnIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII-2 the same spring means, Figures 2 and 3 showing figures with the same scale.

Figure 1 illustrates a drawing table 1 having a stand 2, which consists of two side pieces 3 (only one side piece is shown because the side pieces are equal). The side pieces 3 are connected to each other via a connecting beam (not shown) and each side piece 3 consists of a foot beam 4 and a tubular frame leg 5, which is open at the top. A link system 6 of the parallel member type is pivotally arranged at the top of the frame leg 5 and this link system E has two levers 7 and 8 pivotally mounted on the frame leg S. These levers 7 and 8 are pivotally connected to a tilting device 10 and this tilting device 10 has a spring 11 for inclined load and a brake segment 12, which together with the spring 11 are connected to so-called mounting rulers 13 for a drawing disc 14. The drawing table 1 also has a brake lever 15 for height adjustment and a brake knob 16 for inclined adjustment, but these units have no direct connection. with the present invention.

A link system 6 of the parallel member type is arranged on each side guard 3 and the storage means of the link system 6 on the frame leg 5 are externally covered by covers 17, which are screwed onto the frame leg 5.

For balancing the drawing board 14 and various kinds of riding accessories which are permanently or temporarily mounted on the drawing board 7 14, a hauling means is arranged between the frame 2 and the link system 6. More specifically, these consist of telescopically acting spring means 18, for example of the gas spring type, which are mounted at the bottom inside the frame leg 5 and at the top of a flange 7a, which is arranged on the lever 7 in the vicinity of the frame leg 5.

To facilitate the mounting and / or adjustment of each spring member 18, it is mounted at the bottom to pivot about a point C. The spring member 18 is arranged upright in a position L3 of a number of positions L1 - L8, which are located on a circular arc line CB, whose center coincides with point C, i.e. the lower storage point of the spring member 18 about which it can pivot downwards. c in the illustrated embodiment, said positions L1 - L8 are formed by holes, the center of which coincides with circular arc lines CB. In this way it is achieved that the spring member 18 can be stored in such a way that it does not counteract the pivoting movement. As an alternative to the hole, a longitudinal slot (not shown) can be provided, whether the center coincides with the circular arc line CE, but such an arrangement can in some cases only involve problems because holding the spring member in a certain place in the slit may mean that one must clamp the forearm, which may imply inappropriate resistance to the swing.

In order to be able to easily replace a spring member 18 with a certain spring force with another spring member 18 with another spring force, the frame leg 5 shows a holder 19, which is open in the upward direction and allows the spring member 18 to be lowerable therein and to be stored without being locked against extension in the upward direction but against lateral sliding. As a result, the spring arm 18 can, if necessary, be completely straight out of the frame leg 5 without prior reading and a new spring arm 18 is carried down into the frame leg until it engages the holder 19 without then having to be anchored at the bottom.

The holder 19 is suitably clasp-shaped ace valkically §fa11 «ber in Relation to the stand leg 5. The vertical adjustment can be carried out by means of an eccentric knob showing a handle 20 arranged outside the stand leg, sleeping has a shaft pin 21, which projects into a holes in frame unit 3, If the shaft pin Z1 is eccentrically arranged your shaft 22, on which the holder 19 is arranged. This arrangement means that the movement moves in height when the handle ZS is rotated, and a movement of the holder 19 in height means a change in the "clamping width" of the spring and the spring 18 and thus the spring 18 action.

As can be seen from the drawing, the spring orbit 18 is for the ether part hidden in the tubular frame leg 5 and projects therefrom. The upper parts of the spring member 18 are also covered from the outside by the cover 17, which prevents it being possible to get caught between moving parts by the frame leg 5.

In the drawing, only one spring member 18 is shown, but at the drawing table shown, a spring member 18 can suitably be arranged in each frame leg.

The invention is of course not limited to the embodiment described above and shown in the drawing, but may vary within the scope of the appended claims. Thus, the object of the invention can be used with other types of drawing drills than the one shown, and it can moreover be used to advantage with completely different working tables than drawing tables. Instead of cooperating with the Wed lever 7, the spring member 18 can cooperate with the lever 3. The lever 7 is included via É i ”

Claims (9)

1. v, l W _ n 8107530-1 the embodiment shown in a parallel member system, but this is not necessary but the head heater 7 can be arranged in another way. The upper and lower attachment points of the spring member 18 can of course also be located in another way while maintaining the features essential to the invention. Finally, it can be mentioned that the stated definitions regarding the center point C, the arc of the circle CB and the positions L1-L8 are of course sought after in the ideal position, which can be difficult to achieve in practice. For this reason, the definitions in question should be interpreted as falling within such limits as are reasonable in the present context. Claims: 1. Balancing device at work tables, preferably drawing tables, which have a stand (2), one or more levers (7 ash / or 8) pivotally mounted on the stand (2), one on the lever or the levers (7 and / or 8) arranged working plate (143, and one or more balancing means for balancing on the frame (2) via the lever or levers (7 and / or 8; other parts including the working plate (14), which balancing means or means are constituted by telescopically acting spring means (18), which extends between the frame (2) and the lever or levers (7 and / or 8), the spring member (18) at the top being mounted on the lever arm (7 and / or 8) in one of a plurality of positions (L1 - L8¿, characterized in that each spring tube (18) at the bottom is pivotally mounted on the frame (Ei in the direction of an upwardly open spring member holder (lä) in which the spring member (Sat) is extensively attached so as to simplify the mounting of the spring member. (18) lower end gencm to carry down or pull it up from the spring member holder (19), preferably if the spring holder (19) is concealed inside the frame legs (É) in said positions (Li ~ Lä) for storing the spring member (18) at the top of the lever (7 and / or 8) are located on an arc of a circle (CB), whose centers? åüä coincides with the spring storage point of the spring body (18). A balancing device according to claim 1, characterized in that each position {L1 - LS; on the levers in? and / or 8) for the spring organ (18) is obtained by enclosing a hole whose center coincides with the circular base (CE). Y fw '(e:' l 'J' J é 3. Balancing device according to claim 1, å, še (Er ckna á- of a plurality of positions for íjääercrçaiæl Ära; 1 ë (ef-a »el-la (1, 4 on the lever arm (7 or 8) is obtained by arranging an F 3. - stretched slit along which the jeder organ (l8? Can be applied x s1o7sso-i: <»-.- wmzmwe fl- n - different 1positions} whereby the center of the slit coincides with the circle 'arc' (CB). Balancing device according to one of the preceding claims, characterized in that the spring tube holder (19) is arranged vertically on the stand (2), and is preferably height-adjustable by turning an eccentric knob (20 - 22). 'i I Balancing device according to one of the preceding claims, characterized in that the spring organ holder (19) is clamp-shaped. Balancing device according to one of the preceding claims, characterized in that the spring member (18) is mounted at the bottom in a tubular frame leg (5) on which the lever (7 and / or 8) is pivotally mounted at the top. Balancing device according to one of the preceding claims, characterized in that the greater part of the spring member (18) is located inside a tubular frame leg (5) and protrudes therefrom. V Balancing device according to claim 7, characterized in that the upper end of the spring member (18) is connected to a lever (7) included in a parallelogram system (6). Balancing device according to claim 7 or 8, characterized in that at least a portion of the parts of the spring member (18) 'outside the rough-shaped frame leg (5) are located inside a frame-mounted cover (17) which covers the lever or levers ( 7 and / or 8) storage points on the stand (2).