FI90476C - Remote control device for crane - Google Patents

Description

90476

CRANE REMOTE CONTROL

The invention relates to a remote control for controlling a crane drive, to which remote control buttons are arranged for transmitting control signals, devices for converting control signals into an encoded form and a transmitter unit for sending a signal 1S to the drive control unit.

Infrared remote control networks are becoming more and more common in the control of various machines. Industrial cranes are a particularly interesting application of ErSM. However, the crane 10 differs from most other applications in that it moves over a very wide area in relation to the user and may be used for long periods of time from different locations, under the crane or even tens of meters away. On the other hand, for economic reasons, it is advisable to dimension the infrared remote controls 15 so that they send the control signal only to a rather narrow beam, e.g. ± 30 °. Compared to radio control, infrared control is safer to use because it does not allow driving when the crane is out of sight of the user.

In use, it has become problematic to keep the remote control 20 constantly pointing in the right place. This is due to the physiological limitations of human Kade. When the guide is held in the kSd and its guide beam is to be pointed in the specified direction, the kSantinininen of the guide in the vertical plane is natural Teva with a range angle of ± 15 °. When the user moves to the crane, he often has to keep the roof in an awkward position. The problem is exacerbated in the case of cranes with a low lifting height. As the steering distance increases, the required pace accuracy increases, which also increases the strain.

The TStS problem is illustrated in Figure 1, which shows a sensor 2 receiving the control of a crane drive unit located in the rib-bar 1 of the hoist-30. The figure shows straight directional lines 11, 12 and 13 to the sensor 2 from different operating positions 21, 22 and 23. The width of the directional beam 35 ensuring the control connection is determined by the straight lines 31, 32 and 33 at different operating positions, forming angles 5j, δ2 and S3, respectively. Depending on the position of the user, the position of the remote control with respect to the horizontal is different so that the radius reaches the sensor 2. When the controller is in the horizontal position 22, it is angled with respect to the horizontal at angle 21 and angle α3 at position 5 to 23, respectively. The tShtays line to the sensor would remain in the center of the sync beam. This places unreasonable demands on the user during prolonged work. As the angles of rotation of the controller increase, the user has to work in a tense and uncomfortable position.

The object of the invention is to eliminate the aforementioned problem and to create a new and more user-friendly remote control. In order to achieve this, the invention is characterized in that a signal blocking device is arranged on the top of the transmission unit, which has a signal-shielding window which is obtainable from the background. Other preferred embodiments of the invention are known from the features set out in the dependent claims.

With the remote control according to the invention, the user is able to work more freely and can better focus on the actual control. The directional beam of the remote control is easy to orient so that the receiver sensor is substantially in the center of the beam. This helps to ensure that the connection is maintained during control. The remote control according to the invention allows the crane operator to use the working positions best suited to him.

In the following, the invention will be described more closely with reference to its ErSa embodiment with reference to the drawings, in which Fig. 1 shows problems in a control situation, Fig. 2 shows a remote control 30 according to the invention seen from the front and Fig. 3 shows a remote control from the side.

II

3 90476

Figure 2 shows the remote control 3 seen from the front, in which the operating buttons are placed. The controller comprises a frame formed by a front plate 4, side plates 9 and a rear plate 10, as well as end plates 15 and 16. Inside the frame, control electronics 5 with the necessary components are arranged in a manner known per se. Arranged on the front plate 4 are operating buttons 5 for giving control instructions to the crane drive unit. An infrared transmitter, for example consisting of one or more LEDs, is arranged in the mounting part 15. Mounted on the outside of the infrared transmitters 10 is an at least partially cylindrical bale body 6, the pSaty portions 17 and 18 of which are parallel to the side plates 9 of the remote control 3 and which is made of an infrared-free material. A window 7 is formed on the cylinder surface of the bale body 6, which allows the infrared signal to propagate in its desired direction. The window 7 may be of rain-shoveling material or merely an opening formed in the bale body.

In order to direct the window 7 and thus the infrared rain acting as a control signal in the desired direction, the bale body 6 is arranged to bend in the manner 20 by the arrows AA in Fig. 3 with respect to its central cylinder axis. In order to facilitate turning, at least one end part 17 of the bale body is provided with system members 8 in the form of turning vanes. The operator can change the angle of inclination with one hand and control the crane with the other. It is advantageous to make the guide rail 8 replaceable in different parts of the pSallyskap-25 piece, or the cover vanes can be mounted on both parts, so that the user can follow the filling method of his country.

The body and thus the window must be tiltable by approx. 90 °, i.e. + 45 °, so that the orientation can be carried out in an advantageous manner over the entire working area.

The size of the window 7 can be made variable, for example, so that in the middle of the headland the window is larger than in the edge area of the headland or so that the window is larger at one edge and decreases when tilted to the other edge. It is possible to arrange a pointer at the junction of the body 6 of the Paallys-35 and the front plate 4, which shows the correct angle of intent for each control when the controller is in a certain position, for example, horizontally.

The cover piece can be shaped myds curved, in which case the sSS-dettMvå window or opening is preferably located on the curved pin and its position relative to the remote control body is transmitted. Other types of Mybs constructions are possible as long as the direction of the window and thus the steering beam can be changed.

The invention has been described above by means of a preferred embodiment thereof. However, the disclosure is not to be construed as limiting, but embodiments of the invention may vary within the scope of the following claims.

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Claims (6)

5 90476 A remote control for controlling a crane drive, to which remote controls are arranged buttons (5) for transmitting control signals 5, means for converting the control signals into a pulse signal and a transmitter unit with at least one infrared transmitter a bale body (6) 10 preventing the propagation of a signal is arranged on the bale, which has a signal-shoveling window (7), the orientation of which must be obtained. A remote control for controlling a crane drive according to claim 1, wherein the remote control has a front plate (4) with buttons (5) for giving control signals 15, side plates (9), a back plate (10) and end parts (15, 16), wherein the transmitter unit in the second end part (15) is characterized in that the end part (15) containing the transmitter unit is covered with a signal propagation blocking at least partially curved bale body (6), in the curved part of which a window (7) is arranged. Remote control according to Claim 2, characterized in that the bale body (6) is formed at least partially cylindrical in such a way that its main surfaces (17, 18) are substantially parallel to the side plates (9) of the remote control and the window (7) is formed (6) on the cylinder surface. Remote control according to Claim 3, characterized in that conveying means (8) are formed on at least the second end surface (17) of the bale body (6), by means of which the bale body (6) 30 can be rotated about its longitudinal axis. Device according to one of the preceding claims, characterized in that the window (7) in the baling body (6) is elongate in the longitudinal direction of the baling body. 6 90476