JPH0530103Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial field of application] This invention enables the required number of weights to be determined by detecting the load using a small weighing device when lifting stage backdrops, large props, etc. The present invention relates to a hanging load detection device.

[Prior art and its problems]

The stage's manual hanging device attaches the backdrop and props to the hanging baton, loads a weight that balances the hanging load onto the towline frame, loosens the rope hook, and then the worker pulls down the towline by hand to lift the hanging object. Pull up. In this work, the load of the suspended object is usually unknown, so it is difficult to know how many weights should be loaded. For this reason, workers load and unload the weights several times to maintain balance by loading and unloading the weights several times depending on the strength of the tug. However, it is not only troublesome to load and unload weights many times, but it is also extremely dangerous because if you load too many weights, you will not be able to stop the towline when you loosen the rope hook.

An object of the present invention is to provide a device which solves the above-mentioned problems and uses a tow rope to detect a suspended load.

[Means for solving problems]

The present invention has been made to achieve the above object, and consists of a pedestal on which a weight is placed, to which the end of a wire rope for suspending and supporting a suspended load is placed, and an endless type with both ends fixed to the pedestal. a tow rope, a support for a pulley on which the tow rope is hung, a support plate pivotably pivoted to the support, a rope lock for the tow rope provided at one end of the support plate, and the support plate. It consists of a clamping rod provided on the other end side, and a pressure-receiving piece whose base is fixed to the support, the tip is inserted between the clamping rods, and a strain gauge is affixed to the towline. The gist is to detect the weight or weight of a weight through the low lock, receiving plate, clamping rod, and pressure receiving piece through minute movements.

〔Example〕

The present invention will be explained below based on an illustrated embodiment.

In the figure, 1 is the stage surface, 2 is the side wall, and 3 is the ceiling. Reference numeral 4 denotes a shelf built near the ceiling 3. A support frame 5 is installed on the side wall of the shelf to support a main pulley 6 having several grooves, and several branch pulleys 7 are installed along the entire length. Wire ropes 8 installed at equal intervals...
Multiply by The upper end of each wire rope 8 is wrapped around the groove surface of the original pulley 6 and fixed, and the middle part is fixed to the branch pulley 7.
The hanging baton 9 is tied to the lower end and a background (not shown) is attached to this to support the suspended load.

10 is a vertically long frame, and several brackets 11...
The guide rail 12 attached to the side wall 2 of the stage by...
The other wire rope 13 wrapped around the main pulley 6 is tied to the upper edge of the pedestal 10, and a weight W is loaded onto this pedestal to suspend it from the load of the hanging baton 9. . Reference numeral 14 denotes a box frame suspended from the side end of the boudoir shelf 4, on which a worker stands and loads a weight W onto the frame 10.

Reference numeral 15 denotes a towline made of thick manila rope, which is hung over the upper and lower pulleys 16 and 18, and a weight frame 10 is tied to the middle of the guide rail side, and the upper pulley 16 is set to protrude from the support frame 5 at the side end of the Boudot shelf. A lower pulley support 20 is installed at the side end of the stage surface 1, and the lower pulley 18 is loosely fitted onto an axle 22 inserted between both side plates 21 of the support.

L is a rope lock built into the support 20,
The main body is two oblong receiving plates 23 along the inner surfaces of both side plates 21 of the support, as shown in FIGS. 2 and 3.
Two pins 24, 24 are fixedly planted vertically side by side on this receiving plate, and a disk 25 directed toward these pins via a tow rope 15 is housed between the receiving plates.

Note that the two receiving plates 23 are loosely fitted onto the axle 22.

26 is a threaded rod, which is screwed into a rectangular threaded cylinder 27 fixed to the end between the receiving plates, the small diameter part of the tip is inserted into the disk 25, the pin 28 is used to prevent it from coming out, and the rod is attached to the outer end. Turn the round handle 29 to move the threaded rod 26 forward or backward.

The stage hanging device and the rope lock are constructed as described above. First, the hanging baton 9 is lowered to near the stage surface 1 as shown by the chain line 9', the rope lock L is hung, and the tow rope 15 is raised using the pins 24, 24 and the disc 25. Stop the movement of the baton 9' in this state.
Attach a background to the . At this time, the pedestal 10 has been raised to the side of the boudoir shelf 4, and the worker rides on the box frame 14 and loads the weight W to the pedestal 10 by eye to match the hanging load.

When loading of the weight W is completed, the handle 29 is turned to move the threaded rod 26 backward, and the disc 25 is separated from the towline 15, thereby freeing the towline.

In this state, another worker at the side edge of the stage surface 1 pulls the tow rope 15 to lower the pedestal 10, rotates the main pulley 6 with the wire rope 13 tied to it, and the wire rope 8... By pulling up the hanging baton 9' close to the boudot shelf to lift the background, tightening the rope lock L and fixing the pull rope 15, the hanging baton 9 is held near the boudot shelf and the background is spread out to the full rear of the stage.

During this loading work, the worker places the weight W on the frame 10 by eye, so it is difficult to hang it together.If the weight is too light, it becomes difficult to pull up the hanging baton 9; If it is too high, the hanging baton 9 will rise rapidly, which is dangerous. For this reason, while attaching and detaching the conventional low lock L, the weight W
The process of loading and unloading was repeated several times, making it extremely difficult and dangerous to lift stage backdrops and props.

The present invention is the first in such a hanging object device.
As shown in the figure, a support 20 for the lower pulley of the towline 15
A detection device C is incorporated into the system to automatically detect excess or deficiency of the weight W.

In this embodiment, in order to incorporate the detection device C, the second,
As shown in FIG. 3, the lower corner of the receiving plate 23 is loosely locked to the side plate 21 of the support by a pin 30, and this receiving plate 23 is connected to the side plate 21 of the support so as to be able to swing up and down about the axle 22 as a fulcrum. . 31 is a box-shaped case, with a sturdy base plate 32 housed at the bottom and its leg pieces 33.
is integrally connected to the support 20 of the lower pulley, and on the base plate, thick pressing pieces 35 are placed on the upper and lower sides with the base of the thick pressure receiving piece 34 sandwiched between them, and these are tightened with three bolts 36. Join.

The pressure-receiving piece 34 has both side edges of the intermediate portion connected to the base portion diagonally shaved so that the rectangular tip portion looks into the end portions of the receiving plates 23, 23.

Numerals 37 and 37 are upper and lower nuts welded to the inner surfaces of the ends of the receiving plates 23 and 23. Balls 39 are inserted into the recesses at the tips of bolts 38 and 40 (referred to as clamping rods) that are screwed into these nuts. 40 is advanced and retreated to press the balls 39, 39 against the tip of the pressure receiving piece 34 with appropriate strength, and the receiving plate 2
Pressure receiving piece 34 with clamping rods 38, 40 integrated with 3, 23
Grasp the tip of the Reference numerals 41 and 42 denote two strain gauges, which are attached to both the upper and lower surfaces of the middle part of the pressure receiving piece 34, and the lead wires are connected to the computing device (both not shown).
to detect the amount of strain in the strain gauge.

One embodiment of the device of the present invention has the above configuration,
When the worker loads the weight W onto the frame 10, the weight W
is lighter than the hanging load, the pedestal 10 tends to rise, and the receiving plate 23 attempts to rotate clockwise about the axle 22 via the pins 24, 24 and the disk 25 by the tow rope 15. As a result, the lower clamping rod 40 pushes up the pressure-receiving piece 34, so the lower strain gauge 42 stretches, and the degree of lightness of the weight W is proportional to the amount of strain on the strain gauge, causing strain on the strain gauge. The calculator will indicate the amount of the weight that is missing according to the amount, so
Load the weight W onto the pedestal 10 according to this instruction.

Next, when the weight W is heavier than the hanging load, the pedestal 10 tends to descend, so the tow rope 15 connects the receiving plate 23 via the pins 24, 24 and the disk 25.
tries to rotate counterclockwise about the axle 22 as a fulcrum. As a result, the upper clamping rod 38
4, so the upper strain gauge 4
1 is elongated, and the weight of the weight W is proportional to the amount of strain on the strain gauge, so the calculator will indicate the excess amount of the weight in response to the amount of strain on the strain gauge. Therefore, the weight W is removed from the pedestal 10.

Through such work, the weight W can be balanced with the suspended load by loading and unloading the weight W only once, and the trouble of loading and unloading the weight many times as in the past is eliminated. The work of lifting stage backdrops and props becomes extremely easy, and there is no danger of overloading weights.

[Effect of idea]

According to the present invention, it is possible to easily load a weight that balances the suspended load, which eliminates the danger of excess or deficiency of the weight and simplifies the work. This method has the advantage that it can be performed at low cost with a simple device, and is extremely useful in stage suspension devices and other fields.

[Brief explanation of the drawing]

FIG. 1 is a front view of a stage hanging device, FIG. 2 is an enlarged side view showing an embodiment of the present invention, and FIG. 3 is an enlarged plan view of the detection device. W is a weight, 10 is a frame, 13 is a wire rope,
15 is a tow rope, 16 is an upper pulley, 18 is a lower pulley, 2
0 is a support, 23 is a receiving plate, 34 is a pressure receiving piece, 38
and 40 are clamping rods, 41 and 42 are strain gauges, and L is a low lock.

Claims (1)

[Scope of utility model registration request] A pedestal 10 on which a weight W to which the end of a wire rope 13 for suspending and supporting a hanging load is placed is placed, an endless tow rope 15 having both ends locked to the trestle 10, and the tow rope 15. A support 20 for the suspended pulley 18, a support plate 23 swingably pivoted to the support 20, a rope lock L for a tow rope provided at one end of the support plate 23, and the rest of the support plate 23. The clamping rods 38 and 40 provided on the end sides and the base of the support 20
The tip part is inserted between the clamping rods 38 and 40, and strain gauges 41 and 42 are attached to the pressure receiving piece 34. , clamping rod 3
8, 40 and a pressure receiving piece 34 to detect the weight or weight of a weight.