JPH0215478B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for raising and lowering a lifter base using a monkey rope.

Conventionally, for example, when raising or lowering a shield tunneling machine to transport it to a desired location, a center hole jack type lifting method as shown in FIG. 1 has been used. To explain this, a lifter base 4 is provided between the floor 2 of the structure 1 and the hanging girder 3. A plurality of center hole jacks 5 are arranged on the upper surface of the lifter base 4. A step rod 6, which is provided upright between the floor 2 and the hanging girder 3, is passed through the center hole jack 5 and the lifter base 4. The lifter base 4 is vertically movable by the action of a center hole jack 5 and is held at a predetermined position on the step rod 6. A shield excavator 8 is mounted on the lifter base 4 via a starting rail 7.
Note that 9 is an auxiliary rod and 10 is an auxiliary rod tensioning jack.

When the center hole jack 5 is hydraulically operated, the collection chuck of the center hole jack 5 grips the step rod 6 and raises or lowers the lifter base 4. Thereby, the shield tunneling machine 8 can be positioned at a desired height.

However, such a conventional center hole type lifting method has the disadvantage that it is uneconomical due to its complicated structure and takes many days of work.

This invention was made in view of the above circumstances,
The monkey traps are placed vertically apart and facing each other, and a lifter base is installed between these monkey traps almost horizontally with both ends in contact with the monkey traps, and the hooks and lifting jack stoppers provided above and below both ends of the lifter base are placed between the monkey traps. By alternately hooking onto steps, objects can be raised or lowered easily and safely using a device with a simple structure. This monkey-tall lifting method is economical and can shorten the number of working days. and equipment.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 11.
This will be explained based on the diagram. It should be noted that the monkey-tap type elevating method of the present invention will become clear from the description of the monkey-tap type elevating device of the present invention, so a description thereof will be omitted.

21 in FIG. 2 is a construct, and this construct 21
Eight pillars 23 are provided upright on the slab 22. A pair of these pillars 23 are provided at each of four corners of the rectangle. A large number of rod-shaped steps 24 are installed between the pair of pillars 23 at predetermined intervals in the vertical direction.
This constitutes a monkey trap 25. That is, the monkey trap 25 is made up of a side plate 26 which is the side wall of the column 23, and this side plate 26 and a step 24. As shown in FIG. 3, two sets of monkey traps 25 are provided facing each other.

The pillars 23 facing each other are connected by beams 27 and 28.

Further, a lifter base 29 is provided substantially horizontally between the monkey traps 25 facing each other. The lifter base 29 includes a rectangular frame 30, long members 31 mounted on the rectangular frame 30 via brackets in parallel to each other in a direction perpendicular to the side plate 26 of the monkey trap 25, and attached to both ends of these long members 31. and a roller 32 brought into contact with the side plate 26 of the monkey trap 25.

Lifting jacks 34 are rotatably attached to the lower portions of both ends of the elongated member 31 of the lifter base 29 via brackets 33, respectively. A stopper 35 is provided at the lower end of the lifting jack 34. This stopper 3
5 consists of a bracket 36 and a hook-shaped hook portion 37 provided on this bracket 36, and this hook portion 37 can be hooked onto and removed from the step 24 of the monkey rope 25.

One end of a trunnion jack 38 is rotatably attached to the lifting jack 34, and the other end of the trunnion jack 38 is rotatably attached to a predetermined location of the elongated member 31 of the lifter base 29 via a bracket 39. ing.

Furthermore, hooks 41 are rotatably attached to the upper surfaces of both ends of the long member 31 of the lifter base 29 via brackets 40. The free end of the hook 41 is formed into a hook shape, like the hook portion 37, so that it can be hooked onto and removed from the step 24 of the monkey trap 25.

A hook jack 42 is located in the middle of the hook 41.
One end is rotatably attached, and the other end of the hook jack 42 is rotatably attached to a predetermined location of the elongated member 31 of the lifter base 29 via a bracket 43.

Further, a shield excavator 45 is mounted on the lifter base 29 via a support member 44.

Therefore, when raising this shield excavator 44, (1) As shown in FIG.
7 is hooked on the step 24, (2) As shown in FIG.
2 to remove the hook 41 from the step 24, and further extend the lifting jack 34.

(3) Next, as shown in FIG. 7, when the tip of the hook 41 is located at a height slightly above the top of the step 24 that is one step above the step 24 on which the hook 41 was hooked in (1) above, the hook 41 is The jack 42 is extended and the hook 41 is hooked onto the step 24.

(4) Next, as shown in FIG. 8, the lifting jack 34 is reduced by a length equivalent to 1/2 of the pitch of each step 24 of the monkey trap 25.
The hook portion 37 is separated from the step 24.

(5) Next, as shown in FIG.
is reduced until the tip of the hook part 37 is located at a height slightly above the top of the step 24 which is one step above the step 24 on which the hook part 37 was hooked in (3) above.

(6) Next, as shown in FIG. 10, extend the trunnion jack 38 and insert the hook portion 37 between the steps 24.

(7) Next, as shown in FIG. 11, extend the lifting jack 34 and hook the hook portion 37 to the step 24 that is one step above the step 24 where the hook portion 37 was hooked in (3) above. . As a result, the lifter base 29 is raised by an amount corresponding to the step 24.

(8) After that, by repeating the movements (2) to (7) above, the lifter base 29 gradually rises, and this lifter base 29
At the same time, the shield tunneling machine 45 also rises.

Furthermore, when lowering the shield tunneling machine 45, in the state shown in FIG. remove.

Next, extend the lifting jack 34,
When the tip of the hook part 37 is located at a height slightly above the top of the step 24, which is one step below the step 24 on which the hook part 37 was previously hooked, extend the trunnion jack 38 and insert the hook part 37 between the steps 24. do.

Next, extend the lifting jack 34,
Hook portion 37 is hooked onto step 24.

Next, extend the lifting jack 34,
The hook 41 is raised via the lifter base 29, then the hook jack 42 is retracted to remove the hook 41 from the step 24, and the lifting jack 34 is further retracted.

When the tip of the hook 41 is located at a height slightly above the top of the step 24 one level below the step 24 on which the hook 41 was hooked in the above, the hook jack 42 is extended and the hook 41 is inserted between the steps 24.

Next, reduce the lifting jack 34,
The hook 41 is placed on the step 24 one step below the step 24 on which the hook 41 was previously hooked.
hook. As a result, the lifter base 29 is lowered by one step equivalent to the step 24.

After that, when the above operations are repeated, the lifter base 29 gradually lowers, and this lifter base 2
9, the shield tunneling machine 45 also descends.

In the above operation, when the hook portion 37 and the hook 41 are both hooked on the step 24, the hook 41 is first moved to the next higher step 2.
4, and then the hook part 37 is replaced with the step 24 one step above to raise the lifter base 29. However, the present invention is not limited to this. The lifter base 29 may be raised by replacing the step 41 with the step 24 which is one step higher.

In the above operation, when both the hook portion 37 and the hook 41 are hooked on the step 24, the hook portion 37 is first moved to the lower step 2.
4, and then the hook 41 was replaced with the step 24 one step below to lower the lifter base 29. However, the present invention is not limited to this.
The lifter base 29 may be lowered by changing the hook part 37 to the step 24 one step below, and then changing the hook part 37 to the step 24 one step below.

As explained above, according to the present invention, the elevating device includes a monkey trap that has a plurality of rod-shaped steps installed at intervals in the vertical direction between the side plates and is spaced apart from the side plates in an upright manner, and the side plates. a lifter base that is slidably abutted at both ends and is provided substantially horizontally; a lifting jack that is rotatably suspended from the bottom surface of both ends of the lifter base; and these lifting jacks. a stopper provided on each of the steps and having a hook-shaped hook portion and capable of being engaged with and detached from the step;
a means connected to the lifting jack for rotating the lifting jack; and a means rotatably attached to the upper surface of both ends of the lifter base, each having a hook-shaped tip and capable of engaging and detaching from the step. Since the structure consists of hooks connected to these hooks and means for rotating these hooks, it is possible to easily raise or lower an object with a device of simple structure, making it economical and easy to operate. The number of days can be shortened.
In addition, the hooks provided at the upper and lower parts of the lifter base and which can be freely engaged with and detached from the step, and the hook portion of the stopper are each hook-shaped, so that they can be engaged with the step by going around to the back side of the step. Even if these hooks and stoppers are operated in the detachment direction when the step is stopped, these hooks and hook parts will not detach from the step, ensuring that serious accidents such as the lifter base falling due to incorrect operation etc. are avoided. Safety can be ensured by preventing In addition, lifting jacks are
Since this is installed suspended from the lifter base, even if the means for rotating it, such as a trunnion jack, loses its restraining force, the lifting jack will automatically rotate in the vertical direction due to its own weight. In other words, the stopper is returned to the direction in which it can be latched onto the step, thereby further improving safety and reliability. In addition, since the lower hook part (stopper) is directly fixed to the lifting jack, it has advantages such as a simple and lightweight structure that does not require a heavy frame or the like to be installed at the bottom of the lifting jack. It has a great effect.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an example of a conventional center hole jack type lifting device, Fig. 2 is a partially cutaway longitudinal front view showing an embodiment of the device used in the present invention, and Fig. 3 4 is a partially cutaway sectional view of the main part thereof, and FIGS. 5 to 11 are operating state diagrams shown to explain a method for raising or lowering the lifter base. 24...Step, 25...Monkey trap, 26...Side plate, 29...Lifter base, 34
...lifting jack, 35...stoppa,
37... Hook part, 38... Trunnion jack, 41... Hook, 42... Hook jack.

Claims (1)

[Claims] 1. It has a plurality of rod-shaped steps 24 installed between the side plates 26 at intervals in the vertical direction, and has monkey tabs 25 that are vertically spaced and opposed to each other, and both ends of which are slidably abutted on the side plates. , and a lifter base 29 provided almost horizontally, a lifting jack 34 rotatably attached to the lower surface of both ends of the lifter base in a suspended state, and a hook-shaped hook provided on each of these lifting jacks. A stopper 35 having a portion 37 that can be engaged with and detached from the step; a means 38 connected to the lifting jack for rotating the lifting jack; The monkey trap type is characterized by comprising a hook 41 which is attached so that it can be attached and whose tip is formed into a hook shape so that it can be attached to and detached from the step, and a means 42 which is connected to these hooks and rotates these hooks. lift device.