JPH0324550Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention is used when a tower crane installed on an upper floor carries and attaches materials to a position shifted inward from the crane hook position on a lower floor. The present invention relates to a suspension beam of an autobalance system suitable for use in a vehicle.

``Conventional technology'' When carrying out floor and finishing work after preliminary erection of steel frames, when attempting to carry and install materials to the lower floor using a tower crane installed on the upper floor, it is difficult to The installation position may be shifted inward from the crane hook position. In particular, if there is a scissor-tack scaffolding or external wall curing rope protruding from the top, the gap will be even larger.

In such a case, after approaching as close as possible,
This requires leaning out from inside the building, using a pulling device to pull it in, or setting up a lifting stage, but this is extremely dangerous, and setting up a stage with the assumption that it will be removed is redundant. I don't like it because it forces me to go through some process. Therefore, a balance beam that can control the movement of balance weights to a balanced position was developed in U.S. Pat.
It has been proposed in Utility Model Application Publication No. 59-176874.

In either case, a balance weight is assembled to a single steel beam in a suspended manner with a moving mechanism such as a pinion rack interposed therebetween.

``Problem that the invention aims to solve'' However, with the above configuration, there is no stability of placement at all, and force is applied to the joint between the beam and balance weight during maintenance and placement other than during operation, resulting in failure. The reason is that the motor for driving the pinion must be placed on the balance weight side of the moving body, which makes it difficult to secure enough weight for the space it occupies, and the motor cord is dragged by the balance weight of the moving body, resulting in breakage accidents. There are various practical difficulties, such as the tendency to cause problems.

``Means for solving problems'' and ``effects'' This proposal was made in view of the circumstances described above, and its gist is that the structure of the hanging beam should be placed within a rectangular surrounding steel frame with legs. A balance weight with a running roller is assembled via a guide rail in such a manner that its bottom side fits within the leg, and a ball screw driven by an electric motor is installed in the longitudinal direction of the steel frame, and a nut block screwed onto the ball screw is installed. If the electric motor is connected to a balance weight and the electric motor is controlled by a tilt sensor mounted on the steel frame, even if the positions of the crane hook and the suspended load on the suspension beam are misaligned, the balance weight will not move within the steel frame. By controlling the movement of the suspension beam, it is possible to lift the suspension beam at a position horizontally apart from the crane hook position while keeping it in a horizontal position. This provides a balance function to the rectangular steel frame, which can be placed stably, and eliminates the need for a motor on the movable body, thereby solving the inconveniences of the conventional ones mentioned above.

"Example" This will be explained in detail below based on the drawings.

Figures 1a and 1b are a plan view and a front view of the hanging beam of the present invention, and 1 in the figure is a surrounding steel frame with rectangular legs 1a,...
2 is a running roller 2 assembled in the steel frame 1.
A is an attached balance weight, and in the illustrated example, it is assembled using a steel frame groove of C-shaped steel as a guide rail. However, balance weight 2
is movable in the longitudinal direction within the steel frame 1, and its base is located above the tip of the leg 1a, so when the surrounding steel frame 1 is placed on the ground during maintenance, it will not hit the ground. Reference numeral 3 denotes a ball screw installed in the longitudinal direction of the steel frame 1, which is supported at both ends by pillow blocks 4 as shown in detail in FIG. 2, and is driven forward and backward by an electric motor 5 via a transmission mechanism 6. The electric motor 5 is connected to a battery 7 (first battery 7) mounted on the steel frame 1.
(Figure). Numeral 8 is a nut block screwed onto the ball screw 3, and the pin 10 attached to the bottom of the nut block is connected to the bracket 9 attached to the upper surface of the balance weight 2, as shown in detail in FIGS. 3a and 3b. It is combined with weight 2.

As a result, the balance weight 2 is moved in the longitudinal direction within the steel frame 1 by the forward and reverse rotation of the ball screw 3. Note that the range of movement is regulated by travel limits L and L'. Reference numeral 11 denotes a control panel for the electric motor 5, which receives instructions from a tilt sensor 12 mounted on the steel frame 1 and radio control. 1 in the diagram
3 is the antenna for the above-mentioned radio control. The tilt sensor 12 is shown in detail in FIGS. 4a and 4b. Although not shown in the figure, a through hole is bored at the lower end of the pendulum plate 12a, and by passing light through this hole, the neutral sensor 12b and tilt sensor 12c detect the degree of tilt, and this detection signal is used to detect the degree of tilt. Based on the control panel 1
2 controls an electric motor 5. In addition, 12d in the figure
is an attached limit switch for protecting the motor in order to prevent the electric motor 5 from being forced to drive in an excessively inclined position.

In Fig. 1, 14 is the wire hanging part from the crane hook, and 15 is the upper and lower two-stage pin 15a.
This is an attachment that can be changed depending on the load to be attached or removed.

The operation of the hanging beam of the autobalance system of the present invention having the above configuration is as shown in FIGS. In the figure, the wire 16 from the crane hook indicates a stop wire.

Bring the hanging beam to the hanging load 18 and hang the sling wire 19. (Figure a) When the suspension beam is hoisted up, the balance is lost and the balance weight 2 moves backward. At this time, the winding operation is performed gradually by one notch. (Figure b) The suspension beam cuts off the ground in a horizontal state and moves to a predetermined location. (Fig. c) Once the suspended load 18 is placed in the designated location, it is slowly hoisted up with one notch. (Figure d) When the sling wire 19 becomes loose, the balance is lost and the balance weight 2 moves forward. (Figure e) After the balance weight 2 moves forward and remains horizontal, remove the sling wire 19. (Figure f) Note that radio control is used in special cases when it is desired to position the balance weight 2 in a position that is impossible with autobalance.

``Effect of the invention'' As described above, according to the present invention, the suspension beam with an auto-balance function is constructed of a rectangular steel frame that is stable in placement and has a built-in balance weight without protruding. Since no trouble occurs, and the balance weight of the movable body does not drag the cord, cord cutting accidents are eliminated, which is extremely suitable in practice.

[Brief explanation of drawings]

Figure 1 a and b are the plan and front view of the hanging beam, Figure 2 is a detailed view of the main part, Figure 3 a and b are the side and front view of the main part, and Figure 4 a and b are the slope. the side of the sensor,
The front view and FIGS. 5a to 5f are explanatory views of the operation of the hanging beam of the present invention. 1... Steel frame, 2... Balance weight, 3...
Ball screw, 4...Pillow block, 5...Electric motor, 6...Transmission mechanism, 7...Battery,
8...nut block, 9...bracket, 10
... Pin, 11 ... Control panel, 12 ... Tilt sensor, 13 ... Antenna, 14 ... Wire hanging part, 15 ... Upper and lower two-stage pin, 16 ... Wire,
17...stop wire, 18...hanging load, 19
...Sling wire.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A balance weight with running rollers attached to a rectangular surrounding steel frame with legs is assembled via a guide rail in such a manner that its base fits within the legs, and the length of the steel frame is An electric motor-driven ball screw is installed in the direction, and a nut block screwed onto the ball screw is coupled to the balance weight,
A suspension beam for an autobalance system, characterized in that the electric motor is controlled by a tilt sensor mounted on a steel frame. (2) The suspension beam of the autobalance system according to claim 1 of the utility model registration claim, which also includes control by radio control.