JPH06501528A - Composition of two-post type stand - Google Patents

Abstract

The invention relates to an arrangement in an elongated working platform (2) which at each end is carried by a mast via a drive support (8) movable along the mast. The drive support includes an electric motor unit by means of which the drive support is drivable along the mast, said drive support pivotally carrying the corresponding end of the platform. At each motor unit an operating means for manual release of a motor brake for lowering the platform in case of power failure, is connected to a levelling device (24-38). The levelling device is arranged to be triggered in order to prevent movement of a drive support resulting in deviation of the platform from a position essentially corresponding to the horizontal position, said transmission being arranged to return the operating means to a position activating the motor brake, if the manual release of the motor brake causes triggering of the levelling device.

Description

[Detailed description of the invention] The invention includes an electric motor that is movable at each end or along the column and that drives the column along the column. An elongated workpiece supported on a column via a drive support with a motor unit The structure of the workbench is such that the drive support portion pivotably supports a corresponding end of the workbench. It is about what exists.

The purpose of this invention is to safely lower the platform in the event of a power outage in the above-mentioned platform. It is to make it possible to

According to the invention, this purpose is to ensure that, in each motor unit, the stand is Actuation means for manually releasing the motor brake for lowering or substantially Prevents movement of the drive support that would cause the platform to deviate from its corresponding horizontal position. connected to a leveling device configured to be activated to leveling device or when the leveling device is activated by manual release of the motor brake. , the actuating means is configured to return the actuating means to a position for actuating the motor brake. This has been achieved by

Therefore, according to the invention, the tilting of the work platform when manually releasing the motor brake This prevents the work surface from sliding along the support under its own weight.

An embodiment of the invention will now be described more fully with reference to the accompanying drawings, in which: FIG.

FIG. 1 is a side view of a two-post workbench of the type utilized in this invention.

Figure 2 is an enlarged view of the part important to the invention related to the left column of the workbench shown in Figure 1. Make a big deal of it.

FIG. 3 is a similar enlarged view of the above portion viewed from a direction perpendicular to FIG.

FIG. 1 shows an elongated workbench 2 assembled with a frame structure, with frame supports 4 at each end. and 6 via respective drive supports 8 and 10 which are movable along their columns. This shows how it is supported. That is, in a not-illustrated manner which is known per se. The drive support is abutted by rollers against a race of rollers extending in the longitudinal direction of the column. It can also be supported via gears on racks that run along the columns. teeth The car is shown only schematically in FIG. 4 and each of the drive supports 8 and 10 along the column. Driven.

The drive supports 8 and 10 are connected to the platform 2 at 16 and 18, respectively, in the upper part of the platform 2. supports the pivot. By supporting the table 2 pivotably, it is possible to prevent the table from tilting. This prevents the stand and support from jamming and becoming stuck.

Between the drive supports 8 and 10 and the corresponding ends of the platform 2 there is a The level described below with reference to FIGS. 2 and 3, with means included in the configuration. There is a ring mechanism. However, such leveling mechanisms generally do not effectively Prevents movement of the drive support that would cause it to deviate from its corresponding horizontal position is configured to be launched to During normal drive operation, the electrical With one force, the drive motor unit whose drive speed is too fast is returned to the horizontal position. You can do this by temporarily stopping it until you reach . This breaker can be controlled by the position of the device to perform automatic operation. This feature The structure of the leveling mechanism that performs this is well known, so there is no need to describe it in detail here. stomach.

In the embodiments shown and described herein, the device according to the invention performs the functions described above. It is said that it forms part of a leveling mechanism, but what is such a mechanism? It is also possible to use it separately.

Solution 2 Referring to Figure 2, the leveling mechanism is supported by the drive unit 8 at 20 and 22. The rod 24 is provided with a rod 24 which can be shifted laterally with respect to the support column 4. one of the rods The end maintains the mutual inclination of the platform 2 and the rod 24 about the pivot 16 when the platform moves. It is connected to the lower part of the platform at 26 by a fitting, not shown, which allows it.

The rod 24 cooperates with one end 30 of a lever arm 32 configured as a cam follower. It supports a barrel-shaped cam 28. The lever arm 32 has a It is pivoted at 34 and connected to the other end 36 or Bowden cable 38. has been done. Via a guide not shown in detail, the Bowden cable 38 up to the electric motor unit 12, and as described in more detail below, the motor Works together with the brake.

In FIG. 3, the electric motor units are arranged parallel to each other and are not shown. 44 and 4, which engage the racks running along the posts, as described above. That of the two motors 40 and 42 configured to drive each gear shown at 6. shown as inclusive of each. , 48 indicates a stopping mechanism. The stop Similar to the device 48, the driving support 8 and lO along the strut by the elements 40-46 The link driving method can be conventional and therefore there is no need to elaborate here. do not have.

Each motor 40 and 42 locks the motor pongee from rotating when the power is stopped, A mechanical configuration operative to thereby lock gears 44 and 46 to the rack. It has motor brake equipment W150 and W52. The configuration of the motor brake itself is The actuation and release movements of the brake can be of the known normal type, and the actuation and release movements of the brake are controlled by the motor shaft. along the direction, towards the rack and away from the rack, respectively. It is something.

The movable elements of motor brakes 50 and 52 are moved in the direction of arrow 55. Manually available from the drive support to release the motor brakes 50 and 52. are interconnected by a link system 54 designed to allow

When the other end of Bowden cable 38 moves in the opposite direction of arrow 55 at 56, The cable pulls the motor brakes 50 and 52 through the linked stem 54; Also move the Linkon stem in the direction of arrow 56 to activate the motor brake. When moving, the cable is connected to the link stem to follow this movement. .

When the power supply is interrupted, the link system 54 is operated as described above to provide drive. When the motor brakes of both the dynamic support part 8 and 1O are released manually, their own weight will cause It is possible to lower platform 2.

In Figure 1, assuming that the table tends to tilt downward and to the left, the table will move around the pivot 16. It will rotate counterclockwise around the center. This will allow you to move away from the bottom of the stand or from the support 4. , the rod 24 is pulled, and the cam 28 follows this movement, causing the cam follower 30 Push up and rotate the lever arm 32 clockwise. Therefore, Bodenke 38 in the direction in which it is pulled down in Figure 2, and in the opposite direction of arrow 55 in Figure 3. It will be destroyed. No manual force on the link stem 54 can resist this movement. , the motor brake is actuated by operation in the opposite direction of arrow 55 in FIG. Part 8 will be temporarily suspended. The drive support 10 performs continuous unrestricted movement. Therefore, by doing so, the stand 2 assumes the horizontal position 1 again, and the opening and closing position 24 are adjusted as shown in Fig. 2. Soften to the left. Thereby, the cam 38 or the cam follower 30 will eventually engage. Continuous manual force or motor brake on the link stem 54 to release the condition. 50 and 52 can be released again to restart the lowering movement of the drive support 8. Wear.

The breaker for normal operation of the drive motor unit briefly explained above is shown in Figure 2 at 6. It is indicated by 0. These breakers are connected to cams similarly placed on the rod 24. 62 and 64.

Of course, the invention is not limited to the embodiment shown in the figures and described above, but within the scope of the claims. It can be changed within.

Fig, 2 Fig, 3 international search report international search report PCT/SE　91100563

Claims (5)

[Claims] 1. Each end is movable along a column (4, 6) to enable driving along this column. via a drive support (8, 10) containing an electric motor unit (12, 14) In the elongated workbench (2) supported by pillars, the drive support is The corresponding end of the stand is pivotally supported, and each motor unit (1 In 2, 14), a motor brake for lowering the platform when the power supply is stopped. The manual release actuation means (54) of (50, 52) correspond substantially to a horizontal position. should be activated to prevent movement of the drive support that would deflect the platform out of position. It is connected to a leveling device (24 to 38) configured to 38), when the leveling device is activated by manual release of the motor brake, configured to return the actuating means (54) to a position for actuating the motor brake; The composition of a long and narrow workbench. 2. The leveling device at each drive support is such that the platform (2) is actuated when tilted, thereby coupling the leveling device to the transmission device (38); The structure according to claim 1, characterized in that it includes a mechanism (24-32) for enabling Completed. 3. The mechanism responds to the mechanical movement of the platform (2) when it is tilted, and the mechanical transmission device (3) 8) is mechanically coupled to a transmission device configured as including mechanical means (24) adapted to provide return movement of the stage (54); The configuration according to claim 2, characterized in that: 4. The mechanical means includes a cam (28) whose movement is caused by a cam follower (30). This cam follower is configured as a Bowden cable (38), link row, etc. Arrangement according to claim 3, characterized in that it is connected to a transmission device made of 5. The movement of the cam (28) is a translational movement, and the cam follower (30) is a two-arm lever. - (32), and this two-arm lever is pivotally supported between its ends. One of its two ends is in contact with the cam, and the other end (36) is in contact with the transmission device (38). 5. The arrangement according to claim 4, wherein the arrangement is connected to: ).