JP2596783B2 - How to confirm the safety of the ceiling suspended load - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATIONS The present invention relates to a large hall used for various purposes such as ceremonies, parties, concerts, shows, exhibitions, and various sporting events. Before hanging necessary lighting equipment, signboards, and other decorations, consider beforehand whether the weight (hanging load) of such decoration equipment is safe in light of the strength of the ceiling structure. To confirm the safety of the suspended load on the ceiling of the building to be implemented.
The present invention relates to a method for confirming safety of a suspended load on a ceiling, which can be directly and easily performed by an owner, a manager, an event organizer, and the like of a hall in an extremely easy-to-understand manner.

The safety confirmation method of the present invention is also carried out when hanging various devices required for the operation of the factory on the roof or ceiling structure of the factory.

2. Description of the Related Art Recently, large halls used for various purposes such as ceremonies, parties, concerts, shows, exhibitions, and various sporting events have been constructed and used in various places. When installing lighting fixtures, signboards and other decorations required for the event by hanging them on the ceiling of the hall, whether the load of such decoration equipment is safe in light of the strength of the ceiling structure Checking is essential.

Therefore, conventionally, at the stage where the magnitude and position of the suspension load are determined, it is customary to ask a structural designer who designed and constructed the hole to examine and confirm the safety each time.

Alternatively, the position of the suspension point and the magnitude of the suspension load are determined in advance at the stage of designing and constructing the hall, and the actual suspension load is set within an allowable range and suspended according to this determination.

Problems to be Solved by the Present Invention (I) The method of requesting the structural designer to confirm the safety of the suspended load each time an event occurs requires the work of the structural designer every time the event changes. I can't stand the trouble and I can't handle it well. Further, since it takes time to calculate the safety confirmation, there is a problem that much time is required for the preparation and the cost is high during the restricted event period.

(II) On the other hand, the method of determining the position of the suspension point and the magnitude of the suspension load on the ceiling structure in advance and using it within that range does not require the trouble of calculating the safety confirmation each time. In order to design the strength of the ceiling structure to match the maximum value of the ceiling, it is a fact that the structure is uneconomical in light of the actual situation of the use of the hall, and this point is a problem to be solved. ing.

Means for Solving the Problems As a means for solving the above-mentioned problems of the prior art, a method for confirming the safety of a suspended load on a ceiling according to the present invention includes a ceiling (or a roof, The same applies to the following.) The magnitude, position or use conditions of the range of the suspension load for each suspension point 2... Are input to the computer 3, and the strength of the ceiling structure 4 held by the computer 3 and each A dynamic study is performed in the light of a safety confirmation program (software) for the load capacity of the hanging points 2. The output of the examination result is displayed on the display 8 as an image, and is performed as an instruction or display for the corresponding hanging point 2 on the ceiling. Based on the instruction or display, the load corresponding to the corresponding hanging point 2 is hung. It is characterized by the following.

In the above method of confirming the safety of the ceiling suspended load,
The output of the examination result by the computer 3 is, specifically, blinking of the display lamp 5 with respect to the corresponding hanging point 2 of the ceiling 1, display of the hanging load value on the display screen 6, or power supply of the electric hoist 7. It is characterized in that it is performed as an instruction to cancel the interlock of the circuit.

In addition, the use condition of the magnitude, position or range of the suspension load with respect to each suspension point 2... Prepared in advance on the ceiling is input to the computer 3, and the strength and strength of the ceiling structure 4 held by the computer 3 are determined. A mechanical study will be conducted in the light of a safety confirmation program for the load capacity of each suspension point 2. The output of the examination result is displayed on the display 8 as an image and is performed as an instruction or display for the corresponding hanging point 2 on the ceiling. Based on the instruction or display, the load corresponding to the corresponding hanging point 2 is hung. And
An actual measured value of the load is fed back to the computer 3 to check for a difference from the initial use condition input.

The computer determines the weight and arrangement of the equipment required for the operation of the factory, or the size and position of the weight (hanging load) of lighting equipment, signboards and other decorations required for the event, or the use conditions of the range, and the computer 3 When the computer 3 is entered, the computer 3 receives the strength of the ceiling structure 4 and each hanging point 2 held as a safety confirmation program (software).
The dynamics of whether or not it is safe is calculated based on the load capacity of the vehicle. The examination result is displayed on the display 8 as an image, printed out by the printer 9 as necessary, and performed in real time as an instruction or display for each hanging point 2 of the factory roof or hall connected online with the computer 3. This can be visually confirmed on site.

It is safe to suspend the load corresponding to the corresponding suspension point 2 based on the output display or instruction of the examination result confirmed in this way.

That is, at the site, it is determined whether the display lamp 5 of each hanging point 2 indicates safety or danger, or the display screen 6
Suspend by limiting to the lifting load of the load value indicated in. Alternatively, in the electric hoist 7 in which the interlock is released, the suspending hook 7a comes down automatically or by a push button operation through the operation panel 10, so that the suspending load may be suspended therefrom.

The magnitude of the actual load suspended at the suspension point 2 is measured by the strain gauge 15 or the load cell 13 in real time and fed back to the computer 3. However, it is immediately checked whether or not it is actually being observed at the site, and a thorough safety management system is ensured.

Embodiment Next, the illustrated embodiment of the present invention will be described.

First, Fig. 1 shows a cross-sectional view of the entire structure of a large hall building that is used for various purposes at various events.
The ceiling structure that forms the pillarless Owarima hall is composed of the truss 4. Therefore, the strength of the ceiling structure is accurately calculated as the strength of the truss 4, and it is easy to confirm the safety in terms of strength according to the load conditions by making full use of a large computer or the like. is there.

FIG. 2 shows the main arrangement of the chair seat 11 of the large hall and the truss 4 as the ceiling structure, and the positions and types of the suspension points 2... Prepared in advance on the ceiling structure 4.
The basic idea of the arrangement of the suspension points is to connect each girder truss 4 with a connecting girder truss 4 ′ orthogonal to the girder truss 4, and to connect a girder truss 4 ″ placed in the middle of the girder truss 4 in parallel with the girder truss. At the position of each intersection with the beam truss 4 ', suspension points 2 ... and 2' ... are prepared, respectively.

The specific configuration of the suspension point 2 to be prepared is as a suspension fitting 1 having a suspension hole 1a as illustrated in FIGS. 3A and 3B or an electric hoist having a suspension hook 7a as illustrated in FIG. The truss 7 is installed on the lower chord of the truss.

In the case of the hanging fitting 1 shown in FIG. 3, a strain gauge 11 for measuring the actual magnitude of the hanging load and feeding it back to the computer 3 is provided. Further, an indicator 12 for displaying online a result of the examination of safety confirmation by the computer 3 is also provided. This indicator 12 has a display lamp 5 which is lit in blue or red only when the suspension load is safe in light of the strength of the ceiling structure (beam truss 4, 4 ', 4 "), and safety is confirmed. For example, a liquid crystal display screen 6 for displaying the magnitude of the suspended load by digital numbers such as 9 tons, 7 tons, 5 tons, and 1 ton is provided.

On the other hand, the electric hoist 7 shown in FIG. 4 is installed on the lower chord of the beam truss 4 via a load cell 13 which measures the magnitude of the actual suspension load and feeds it back to the computer 3. In this electric hoist 7, the hanging hook 7a is raised and lowered by the electric motor 7b. The electric motor 7b is controlled automatically, for example, through an operation panel 10 to which the result of the examination by the computer 3 shown in FIG. 5 is output, or remotely by a push button. That is, an interlock is incorporated in the power supply circuit of the electric motor 7b, and when safety is confirmed by examination of the hanging load by the computer 3, the interlock is released, and the electric motor 7b is started automatically or by a push button operation to start the electric hook 7h. 7a is lowered to a position above the floor so that a corresponding load can be suspended. Also, the electric hoisting machine 7 as the hanging point 2 is provided with a lamp 14 (or a display unit of the suspended load value as necessary) for displaying online when the safety is confirmed as a result of the examination by the computer 3. This can be visually confirmed on site.

Therefore, assuming the position of the ceiling structure and the suspension point stylized in the above configuration, the design of the hall,
At the construction stage, program how to calculate the strength of the ceiling structure (beam truss 4, 4 ', 4 ") and how to calculate the strength of the safety check on the magnitude of the hanging load at each hanging point 2 ... Is stored in the computer 3 as software for mechanically examining and confirming the characteristics.For example, the maximum load (load capacity) allowed for one suspension point 2 is determined by the suspension point 2 ( FIGS. 2 and 7A to C) are limited to 10 tons, and the suspension point 2 'provided along the beam truss 4 "(see FIGS. 2 and 7E) is one.
In addition to determining the ton as a limit, a number of load patterns are set, and a system that automatically checks safety by combining these load patterns is formed. For example, the maximum suspension load when suspending at one point at the suspension point 2 of one girder truss 4 is 9 tons (Fig. 7A). 2 to 7 tons (Fig. 7B), and when dispersed at three places, 5 tons to each hanging point. Tons. However,
If all loads are suspended at all suspension points 2 ... of the girder truss 4, each suspension point shall be suspended with a limit of 1 ton,
In this case, no load can be suspended at the suspension point of the small beam truss 4 "(FIG. 7D). Conversely, a load of 1 ton is suspended at each suspension point 2 'of the small beam truss 4". In the case (FIG. 7E), a computer program (software) for confirming safety is created in such a pattern that calculation is performed so as not to be suspended at any of the suspension points 2 of the girder truss 4.
This program is for ceiling structure (beam truss 4,4 ', 4 ″)
The information is stored in a memory of the computer 3 as a built-in program or stored in a floppy disk or the like as ROM information of the strength and the load capacity of each hanging point.

Therefore, when the event is determined and the size of the hanging load such as lighting fixtures, signboards, and other decorations required for the event and the use conditions regarding the position to be hung or its range are determined, a flow diagram is shown in FIG. As shown, the conditions such as the magnitude, position and range of the suspension load are input to the computer 3 by key operation, and the truss is mechanically examined (calculated) by the safety confirmation program held by the computer 3. Close.

Of course, in this case, the input operation of the computer 3 can be performed by a normal operator, and there is no need for a specialist in structural design each time.

The result of the mechanical examination by the computer 3 is immediately displayed on the display 8 as an image, and for the suspension point determined to be dangerous (NO), the magnitude and position of the suspension load are changed and re-examination is attempted.

As a result of mechanical examination by computer 3, safety (YE
If determined to be S), it is also displayed on the display 8 and printed out by the printer 9 as necessary, and the corresponding hanging point 2 connected online with the computer 3 has, for example, the third Suspension fitting 1 in the figure
In the case of the above, the above-mentioned examination result is displayed on the display lamp 5,
Alternatively, the magnitude of the load is displayed on the display screen 6, and the user can visually confirm the work at the work site. In addition, in the case of the electric hoisting machine 7 shown in FIG. 4, the display lamp 14 is turned on and can be visually recognized at the site. In addition, the interlock of the electric motor 7b is released and automatically or through the operation panel 10. The hanging hook 7a can be lowered by button operation.

Therefore, after fully confirming the magnitude and position of the load on site, for example, in the case of safety confirmation by the event organizer, report it to the owner of the hall and receive permission (agreement) for the suspended load, (Event decoration). In the case of the electric hoisting machine 7 shown in FIG. 4, since the hanging hook 7a comes down, the hanging work can be performed on the floor. Suspension fitting 1 in FIG.
In the case of, prepare a movable workbench on the floor of the hall and hang it.

Thus, when a predetermined hanging load is hung at the predetermined hanging point 2, the magnitude of each actual load is measured by the strain gauge 15 or the load cell 13 and fed back to the computer 3 in real time. Then, it is examined whether the measured value matches the magnitude and position of the suspension load input to the computer 3 as the initial use condition. If the initial usage conditions are met or within the permissible range (YES), execution of the event is started. However, when the actual lifting load is different from the size and position of the initial use condition and exceeds the allowable limit (NO)
Is recommended to change the size and position of the lifting load so that they match the conditions of use, and urge the change.

Therefore, the operation conditions of the magnitude, position or range of the suspended load of the event are completely controlled by the operation of the computer 3, and the safety thereof can be confirmed with high accuracy and speed.

Advantageous effects of the present invention As described in detail in conjunction with the embodiment above, according to the method for confirming the safety of the ceiling hanging load according to the present invention, for the hanging load of the roof of the factory or the ceiling of the event hall, The owner or manager of the factory or hall or the organizer of the event can use the computer 3 directly to check the safety easily and with extremely high precision. Can be expected, and the record remains.

Moreover, many safety checks can be performed quickly without the need for the structural designer, so that the necessary hanging load can be appropriately arranged according to the decoration of the event or the layout of the equipment at the factory. it can.

Therefore, the design guideline for the ceiling structure of the building is not an uneconomical design based on the assumption of the maximum suspension load, but rather the method of determining the size and position of the suspension load allowed based on the strength of the ceiling structure. Therefore, an economical ceiling structure can be designed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an outline of the structure of an event hall in which the method of the present invention is carried out, FIG. 2 is a plan view illustrating the positions of hanging points in a ceiling structure, and FIGS. FIG. 4 is a front view showing an electric hoist as another example of a hanging point, FIG. 5 is a layout view of a computer operation unit, and FIG. FIG. 7 is a flow chart showing the procedure of the safety confirmation method, and FIG. 7 is an explanatory view showing a load pattern at each hanging point. 2 ... hanging point, 3 ... computer 4,4 ', 4 "... beam truss (ceiling structure) 1 ... hanging bracket, 12 ... display 5 ... display lamp, 6 ... display screen 7 …… Electric hoist, 11… Strain gauge 13 …… Load cell

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yu Takase 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Tadataka Hirose 8-2-1 Ginza, Chuo-ku, Tokyo No. Takenaka Corporation Tokyo head office

Claims (5)

(57) [Claims] 1. A computer is used to input the magnitude, position, or range of a hanging load for each hanging point prepared in advance on a ceiling to a computer, and the strength of the ceiling structure held by the computer and each hanging condition. Perform a mechanical study in the light of the safety program for confirming the load capacity of a point, output the study results as an image on the display, and use it as an instruction or display for the corresponding suspension point on the ceiling. A method for confirming the safety of a suspended load on a ceiling, characterized in that a load corresponding to a corresponding suspension point is suspended based on the above. 2. The output of the examination result by the computer is:
2. The method for confirming the safety of a suspended load on a ceiling according to claim 1, wherein the display is performed as a blinking of a display lamp at a corresponding suspended point on the ceiling. 3. The output of the examination result by the computer is:
2. The method according to claim 1, wherein the numerical value is displayed as a value of a hanging load at a corresponding hanging point on the ceiling.
The method for confirming the safety of the ceiling suspended load described in the section. 4. The output of the examination result by the computer is:
2. The method for confirming safety of a suspended load on a ceiling according to claim 1, wherein the method is executed as an instruction to release an interlock of a power supply circuit of the electric hoist. 5. The use condition of the magnitude, position or range of the suspension load for each suspension point prepared in advance on the ceiling is input to a computer, and the strength of the ceiling structure held by the computer and each suspension Perform a mechanical examination in the light of the safety verification program for the load capacity of the points, output the examination results as an image on the display, and use it as an instruction or display for the corresponding hanging point on the ceiling. A method for confirming the safety of a suspended load on a ceiling, comprising suspending a load corresponding to a corresponding suspension point, feeding back the measured load value to a computer, and checking whether the input condition is different from the initial use condition input.