JPS6043572A - Method and apparatus for falling heavy article by rising andfalling jack apparatus group - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is applicable to lifting and lowering sliding formwork, work scaffolding, work floors, and highly rigid horizontal materials that support them using the slip form method or the climbing 7-ohm method. In particular, this invention relates to a technique for lowering this using a plurality of elevating and lowering jack devices.

For example, when raising and lowering a horizontal member (work floor) (b) surrounding a structure (a) under construction as shown in Figure 1, the horizontal member (b) is placed around the structure (a). Multiple books to guide (
The horizontal members (b
) are placed on the rack, and the horizontal members (b) are raised and lowered by simultaneously operating the lifting and lowering shirt inserts (2).

FIG. 2 schematically shows this lifting jack system K(2). That is, in the same figure, (3) and (4) are
), each of which has a taber surface (3a) facing the rond (1);
(4a) is formed, and the rond (1) is formed by the wedge effect of the engaging claw (7Xs) that is pushed between the cylindrical taper box (3aX4a) and the periphery of the rond (1) by the elasticity of the spring (5x6).
is grasping. Both frames (3×4) are connected by a lifting jack (9) that expands and contracts in the vertical direction.

(10) and (11) are assembled with the upper claw release jack and lower claw release jack assembled on both frames (3X4) (the assembly structure is not shown), each of which is connected to the above-mentioned engaging claw (7). (
8) t- Upper claw release ring (12
) and a lower claw release ring (13).

(14) is a detector mounting rod installed upright on the lower 7-ray A (4), and one hole (3b) is installed on the upper frame (3).
), and in order from top to bottom, the upper frame rise detector (15), jack extension detector (
16), Jerking shortening detector (17) at a short interval
Also, a lower frame lift detector (18) is attached. These four types of detectors (15) (16X17X
18) is constituted by, for example, a reed switch.

Additionally, an upper claw release detector (19) and a lower claw release detector (
20) is attached. Both detectors (19X2
0) is constructed by a proximity switch.

The elevating and lowering jack device (2) having the above-mentioned structure is lowered by the following steps. This is shown in Figure 3 (A) to (G
).

(A) First, FIG. 3 (A) shows the initial state of the lowering operation of the device (2). Upper nail (7) and lower nail (8)
) is engaged with the rod (1), and the lifting jack (9) is in a shortened state.

(B) From the state of (A), the upper claw (7) and rod (1)
Using the engagement part with the rod (1) as a reaction force support part, further shorten the lifting jack (9) slightly and lift the lower frame (4) to disengage/release the engagement between the lower claw (8) and the rod (1). do. The lifting height of the lower frame (4) at this time is regulated by activating the lower frame lift detector (18), and the shortening operation of the lifting jack (9) is stopped. Next, operate the lower claw release jack (11) to push down the lower claw release ring (13) and release the lower claw (8).
to be released. Whether or not the lower claw (8) is completely released is detected by the lower claw release detector (20) (see Fig. 3 (B).
)).

(0) Next, from the state of (B), extend the lifting jack (9) downward and lower the lower 1lII frame (4) fc
lower it. The jack extension detector (16) detects that the lower frame (4) has descended by a predetermined distance (FIG. 3(O)).

(D) Next, from state (0), lower claw release jack (1
Stop the operation of 1), that is, remove the pressure oil from the jack (11), move the lower claw (8) to the old position by the restoring force of the spring (6), and engage it with the rod (1). .

This lower claw (8) is detected by a 1-alloy lower claw core number detector (20) for the rod (1) (FIG. 3(D)).

(Similar to the case where the lower frame (4) is slightly lifted in (B) above, the engagement part between the lower claw (8) and the lower part (1) is used as a reaction force support part to raise and lower the lifting jack. (
9) and lift the upper frame A (3) t- to release the engagement between the upper claw (7) and the rod (1-7).

The lifting height of the upper frame (3) when the upper frame (3) is raised is regulated by rotating the upper frame lift detector (15), and the extension operation of the lifting jack (9) is stopped. Next, operate the upper claw release jack (10) to push down the upper claw release ring (12) and release the upper claw (
7) Release. Whether or not the upper claw (8) is completely released is detected by the upper claw release detector (19) (FIG. 3(E)).

<y> Next, from state (1), lower claw (8) and rod (
Lifting jack (9) using the meshing part with 1) as a reaction force support part
, and lower the upper 7 frames (3). The jerk reduction detector (17) detects that the upper frame (3) has descended by a predetermined distance (FIG. 3(F)).

(G) Next, the pressure oil is removed from the upper claw release jack (10), and the upper claw (7) is returned to its old position by the restoring force of the spring (5) and engaged with the rod (1). This upper nail (
7) to the rod (1) with the upper claw release detector (1).
9) (Fig. 3 (G)).

This causes the device (2) to return to its initial state and complete one cycle of the descending process.

Based on the above-mentioned operation, the lifting jack device (2) can be operated smoothly when used alone, but as shown in Figure 1, it can be operated smoothly when used alone. Conventionally, when multiple lifting jack devices are operated simultaneously, the operation of each device (2) gradually slows down, as the operation of each device (2) has been operated without strictly synchronizing the operation. The device (2
) is transferred to another device (2) that operates with a delay via a rigid horizontal member, and the load of the latter device (2) is
E) or (B) movement during the song is obstructed and the device (2
) The engaging claws (7) of the frame directly support the heavy load of the
) There was a problem in which the aircraft fell into a state where it could not descend without the release of (8) being carried out. Incidentally, when these devices (2) group are raised, this phenomenon does not occur for the following reason. In other words, when ascending, if there is a delay in the ascending motion of each lifting jack device (2) that is interconnected by the same horizontal member, the load borne by the device (2) that moves f If the device (2) which is being ascended in advance is gradually exposed through the horizontal material, and the load exceeds the capacity range of the latter device (2), only the device (2) will be unable to ascend. fall into a state. 75λ and other lagging devices (
2) As the load is reduced, it continues to rise without stopping.

As the device (2) rises, the load of the device R (2), which is unable to rise, gradually returns to the former device (2), and further decreases to within the capacity range of the latter device (2). Then, the nuclear device (2) begins to rise again. In this way, by repeating this phenomenon with a slight height difference between each lifting jack device (2), each device (2)
Even if these devices (2) are connected by rigid horizontal members, even if the individual devices (2) are not synchronized, the group of devices (2) as a whole can
Continue to rise without falling into a state of incapacitation.

In view of the above points, the present invention is designed to smoothly operate a group of lifting jacks when a heavy object is lowered by a group of lifting jacks connected to each other by rigid horizontal members, etc. .

In order to achieve this object, the present invention first focuses on the lowering method, during the operation of each elevating jack, starting and stopping which are the basics, and the interlocking pawl of the upper frame and the lower frame of each elevating jack device. The meshing change process of the meshing claw with respect to the rod ((A) → (B) or (D) →
(Ft) process), etc., and a process of detecting and adjusting the relative level difference (height difference) between each lifting jack device was included in the mesh alternation process. Second, the present invention provides, in addition to the hydraulic and electric circuits that operate each lifting jack device and its control device, relative level detection means and nail engagement state detection means for transmitting information necessary for the adjustment work, and these information. Based on this, it was decided to provide a central control device to adjust the operation between each lifting jack device.

Hereinafter, one embodiment of the present invention will be explained using drawings. In Fig. 4, 4-machine arrangement FC (2) indicates the elevating and lowering jack device shown in Fig. 2. It is equipped with an electric circuit (21).

The hydraulic piping (22) is for the extension of the lifting jack (9).
) is for shortening the same, and (24) is for the upper claw release jack (lO
) is for operating the lower claw release jack (11), and (25) is for operating the lower claw release jack (11). This operating hydraulic and electric circuit (21
) is connected to a terminal control device (26) and operates each lifting jack device (2) in response to instructions from the device (26). Its operation is as described in the above items (A) → (G), and each terminal control device F (26) is connected to each detector (15X16X
17X18) (19) (20) Receives the signal (27) indicating that each process is completed, and sends the instruction signal (28) one after another to start the next process. ).

In the embodiment, the heavy load of each lifting jack R (2) is directly supported by the upper 7 frames (3).
A relative level detection means (29) is attached to one end of the . This relative level detection means (29) detects the relative level difference between the upper 11j frames (3) of each lifting jack device (2), and can transmit this as an electric signal. Electrode water level gauge (% 1976
-20412) etc. are used.

The signal sent from this relative level detection means (29) (
3o) is sent to the central controller (31) with or without the terminal controller (26).

The central control unit 4M (31) has the relative level detection means (
Receive the level signal (3o) from 29), calculate the level difference with other devices (2) based on the level of the lifting jack device (2) at the highest level, and calculate the difference in advance. If the set level difference tolerance is exceeded, the level adjustment signal (32 ) t- send. The terminal control device (26) that has received this signal (32) extends the lifting jack (9) while receiving this signal (32), and extends the upper frame with respect to the lifting jack device (2) that is the reference. Align the level of (3). In addition, to this central control device (31) K, signals (3
3) is now sent, and conversely, a synchronization control signal (34) is sent from the central controller (31) to the terminal controller (2G) to synchronize and lower each upper frame (3). ) is sent.

Next, a series of procedures for lowering a group of lifting jack devices (2) that are rigidly connected to each other by horizontal members or the like using the device configured as described above will be explained in general.

(a) Initial state The lifting jack (9) of each lifting jack device (2) is in the shortened state, and the upper claw (7) and lower claw (8) are both engaged with the rod (1) ( (See Figure 3 (A))
.

(b) Release process of the lower frame (4) Each terminal control device (26) is connected to the hydraulic pressure for operation and the electric circuit for shortening the lifting jack of the electric circuit (21).
"ON", the elevating jack (9) in the shortened state is further shortened slightly, and the engagement between the lower claw (8) and the rod (1) is released.

When the lower 7 frames (4) rise to the neck and foot position, the lower frame rise detector (18) indicates [OHJ], this signal is sent to the terminal control device (26), and the device (26) The electric circuit for shortening the lifting jack is ``OF'IP''.
” and then stop shortening the lifting jack (9). Subsequently, each terminal control device R (26) turns on the hydraulic pressure for operation and the electric circuit for operating the lower claw release jack in the electric circuit (21) to operate the lower claw release jack (11), and then the lower claw release ring ( 13) to completely release the lower claw (8) from the rod (1) (see Figure 3(B)).

(c) Lowering process of the lower frame (4) When the lower claw (8) is pushed down, the lower claw release detector (20)
becomes “ON” and this signal is sent to each terminal control device (26).
The device (26) turns on the hydraulic pressure for operation and the electric circuit for elevating the jack in the electric circuit (21) to extend the elevating jack (9) downward. Lower the frame (4). When the lower frame (4) is lowered to a predetermined position, the lifting jack extension detector (16) turns "ON", and the terminal control device (26) to which this signal is sent activates the electric circuit for operating the lifting jack extension. [OFF J Tonashi, lifting jack (9
) is stopped from extending, and the lowering of the lower frame (4) is stopped (see FIG. 3(0)).

(d) Engaging process of the lower frame (4) Next, each terminal control device (26) sets the electric circuit for operating the lower claw release jack to "0FFJ" to the lower claw (8) of the lower claw release jack (11). Release the rolling blade against the
The lower claw (8) is returned to the old position by the restoring force of the spring (6) and engaged with the rod (1) (Fig. 83 (D)
reference).

(E) Release process of the upper frame (3) When the lower claw (8) engages with the rod (1) K in the above (d), the lower claw release detector (20) turns OFF and each terminal control Upon receiving the signal, the device (26) turns on the operating hydraulic pressure and the electric circuit for elevating jack extension in the electric circuit (21), extends the elevating jack (9) upward, and extends the upper seven frames ( 3) Raise the upper claw (7)
and the rod (1) are disengaged. Upper frame (3)
When the upper frame rises slightly and reaches the predetermined position R, the upper frame rise detector (15) turns ON, and the terminal control device (26) receiving this signal activates the electric circuit for operating the elevating jack extension. Set it to ``OFF'' and lift/lower the jack (
9) Stop the extension. Continue each terminal control device (2
6), turn on the hydraulic pressure for operation and the electrical circuit for operating the upper claw release jack in the electric circuit (21) to operate the upper claw release jack (10), and then release the upper claw release ring (12).
) to completely release the upper claw (7) from the eyelid (1) (see Figure 3(E)).

(to) Lowering process of the upper frame (3) When the upper claw (7) is pushed down, the upper claw release detector (19)
ON” and this signal (33) is sent to each terminal control device (2
6) to the central control unit (31). The central control device (31) waits until the ONJ signal (33) is sent from the upper claw release detector (19) of all the lifting jacking devices (2) to check the lifting jacking devices (which have completed the same phase in advance). 2) is left on standby.

“ON” signal (33) from the last lifting jack device (2)
) is sent, and after confirming that the upper claw release process has been completed in the full lifting jack device (2), the central control device (3
1) receives the signal (30) from the relative level detection means (29) of each lifting jack device (2) and detects the relative level of the reference section.

As a result of this detection, the central control fluid fit (31) is at the highest level, and the level difference between the upper frame (3) of the lifting jack device (2) and the upper frame (3) of the other device (2) is detected. Determine whether the value is within the allowable value. As a result of this judgment, if the level difference exceeds the allowable value, the level difference of the - upper frame (3), which is the highest level 1cF3, is used as a reference until the level difference becomes within the allowable value.
A signal (32) to extend the lifting jack (9) is sent to the terminal control device (26) which activates the upper frame (3) which is at a level lower than the permissible value.

Upon receiving this signal, the terminal control device (26) turns on the hydraulic pressure for operation and the electric circuit for extending the lifting jack in the electric circuit (21) 12, and extends the lifting jack (9) according to the reception time. Raise the upper frame (3).

After confirming the completion of the simple lifting process of the entire lifting jack device (2) using the central control fluid fffi (31), the central control device (31) glass and all the terminal control devices (26
), a signal (34) is sent to simultaneously start shortening the lifting jacks (9) of each lifting jack device (2).

Each terminal control device (26) that received this start signal (34)
As a result, the hydraulic pressure for operation and the electric circuit for shortening the lifting jacks of the electric circuit (21) are turned ON all at once, and each lifting jack (9) is shortened to lower the upper frame (3). When the upper 1111 frame (3) is lowered to the predetermined position, the lifting jack shortening detector (17) turns ``ON''.
"], and each terminal control device (26) receiving this signal causes the electric circuit for shortening the lifting jack to switch to [0FF
J), stop the shortening of the lifting jack (9) and lift it up.
Stop the descent of the IQ frame (3) (Figure 3 (F)
)reference).

(G) During the engagement process of the upper frame (3), each terminal control device (26) turns the electrical circuit for operating the upper claw release jack (OFF J) so that the upper claw release jack (10) is connected to the upper claw (7). The reduction blade is completely released, the upper claw (7) is returned to the old position by the restoring force of the spring (5), and the upper claw (7) is engaged with the red (1) K (see Fig. 3 (G)).

Through the above operations, each lifting jack device (2) returns to its initial state, completing one cycle of the lowering process in the device group. Furthermore, the starting and stopping of the device group shall also be synchronized by the central control device (31).

As described above, the lowering method of the present invention includes the step of adjusting the level difference of each of the seven frames immediately before lowering the frame that directly supports the load of the heavy object of each lifting jack device. Since the structure is configured to synchronize the operations, the device group connected to each other by a rigid horizontal member can be smoothly lowered without falling into a state where it cannot be lowered as in the conventional case. In order to confirm the results obtained by the present inventors, the following experiment was carried out. In other words, as shown in Fig. 5, a lifting jack device (2AX2
BX20X2D) and lowered it.

Figure 6 shows experimental data using the conventional descending method. Immediately after the start of descending, the loads borne by the opposing devices (2B) (2D) become 0, while the loads borne by the other two devices (2AX20) decrease. The load exceeded the permissible limit, and it became impossible to descend. On the other hand, as shown in Fig. 7, when the method of the present invention is used, although there are fluctuations in the load borne by each ff (2AX2BX20X2D), all of them are within the allowable load value and the descent is stopped. It worked smoothly without any problems.

In addition, the device of the present invention is not only equipped with a central control unit, relative level detection means, and seven claw engagement state detection means necessary for the above operation, but also has many of the various signals sent from each detector by a terminal control device. Since the system is structured so that only the minimum necessary signals are sent to the central control unit, fewer signals are sent between the two control units, preventing the generation of erroneous signals, and simplifying the wiring between the two. Also, the control program of the central controller can be simplified.

In addition, in the above embodiment, the upper frame of each lifting jack device was made to receive the load of the heavy object.
This can also be done by the lower frame. In this case, a relative level detection means is attached to the lower frame, and the level of each lower frame is adjusted during the steps (a) to (g) above, and in the step of lowering the lower frame (c). This will synchronize the subsequent lowering operation.

As explained above, the present invention proposes an efficient and smooth technique for lowering heavy objects by finely regulating the operation of each lifting jack device, rather than by improving the performance of each lifting jack device. It is.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view of a construction site showing the implementation status of a method for lifting heavy objects using a group of lifting jacks, Figure 2 is a schematic sectional view of the lifting jacker, and Figure 3 is the lowering operation of the equipment. Figure 4 is a block diagram of the device of the present invention, Figure 5 is a schematic plan view of a construction site showing the experimental situation, Figure 6 is a diagram of experimental data obtained by the conventional lowering method, and Figure 7 is a diagram of the method of the present invention. It is an experimental data diagram. (1) Red (2) Lifting jack device (3) Upper frame (3a) (4a) Tapered surface (4) Lower frame
(5X6) Spring (7X8) Engaging claw (9) Lifting jack (10) Upper claw release jack (11) Lower claw release jack (12) Upper claw release ring (13) Lower claw release ring (14) Detector mounting rod ( 15) Upper frame rise detector (16) Jacket extension detector (17) Jacket shortening detector (18) Lower frame rise detector (19) Upper claw release detector (20)
Lower claw release detector (21) Hydraulic pressure and electric circuit for operation (26) Terminal control device (29) Relative level detection means 1 stage (31) Central control device

Claims (2)

[Claims] (1) A pair of upper and lower frames each having engaging claws that engage with a load supporting rod extending in the vertical direction are connected via an elevating jack, and the upper and lower engaging claws engage and release the load supporting rod, and the IQ; A plurality of elevating jack devices that move up and down on the rod by the chain action of the expansion and contraction of the jacks are positioned substantially horizontally, and each of the elevating jack devices are connected to each other by a threshold horizontal member, etc., and are operated simultaneously. In the method of lifting and lowering a heavily supported heavy object, at least the start and stop of all lifting jack devices are synchronized, and the load of the heavy object is directly supported among the seven upper and lower frames of each lifting jack device. When the engaging pawl of the side frame is released from the rod, it is put on standby, and when all the lifting jack devices reach the standby state of the frame, the relative level difference between each of the seven frames is detected by foot temperature. , when the level difference is equal to or greater than the measured value, the level difference is adjusted by further expanding or contracting the lifting jack of one of the lifting jack devices, and after that, each frame is synchronized and lowered all at once; Furthermore, the process other than the simultaneous lowering operation and the starting and stopping described above is configured to be operated for each lifting jack device. How things descend. (2) A pair of upper and lower frames each having an engaging pawl that engages with a load-supporting rond extending in the vertical direction is connected via an elevating jack, and the upper and lower interlocking pawls engage and disengage from the load-supporting rond, and the elevating jack A plurality of elevating jack devices that move up and down on the four rods are positioned substantially horizontally by a chain movement of expansion and contraction, and each of the elevating jack devices are connected to each other with a threshold horizontal member, etc., and are operated simultaneously. In a device that lifts and lowers a heavily supported object, we quantify the operating hydraulic pressure and electric circuits that operate each lifting jack device individually and their control devices, and the relative level difference between each lifting jack device. a relative level detection means for detecting the engagement and disengagement state of the engagement claws of each lifting jack device with respect to the four prongs, and transmitting this as an electrical signal; Then, the detection signals sent from the relative level detection means and the nail engagement state detection means are received, compared and processed, and necessary signals such as a level difference adjustment signal and a synchronization signal are sent to the control device of each of the lifting jack devices. A device for lowering heavy objects using a group of lifting jack devices, characterized in that the device has a central control device that sends a signal to the device.