JPS59118991A - Bypass apparatus of rope for hanging down glove bucket - 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 relates to a hanging rope bypass device which is auxiliary equipped when a grab bucket hanging type excavator excavates directly below an obstacle.

Conventionally, in the open caisson construction method, as shown in Figure 7, in which the earth and sand inside the caisson 1 are excavated and the caisson 1 is buried underground, excavation is generally carried out using a grab bucket hanging excavator. is being carried out.

However, when excavating the opening 1a of the caisson 1, it is possible to directly excavate with a grab bucket, but when attempting to excavate directly under the caisson bulkhead 1b, the bulkhead lb itself becomes an obstacle, so the grab bucket cannot reach it. , there was a problem that it could not be directly excavated.

This invention was made in view of the above-mentioned circumstances, and allows the hanging rope of a grab bucket hanging type excavator to be guided directly under the obstacle by bypassing the obstacle, so that the grab bucket can directly excavate directly under the obstacle. The purpose of this invention is to provide a diversion device for hanging ropes.

shall be.

The hanging rope detouring device of the invention that has achieved this purpose consists of a trolley installed above the obstacle, and a rope attached to the trolley that extends downward so that its tip is located directly below the obstacle. It is characterized in that it consists of a formed guide frame and a four-pipe guiding sheave attached to the guide frame.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

This embodiment is an example in which the caisson partition wall 1b in the open caisson construction method shown in FIG. 1 is used as an obstacle, and its details are shown in FIGS. 2 and 3. In these figures, 1b is a caisson bulkhead, and 2a is a girder of the ground scaffolding 2 provided above the caisson 1. The ground scaffolding 2 will be described later, but in this case the girder 2& is designed to move in the left and right directions in FIG.

A traveling carriage 3 is movably provided on this girder 2a. The traveling bogie 3 has a substantially inverted U-shape, and has wheels 4 on its upper inner surface that roll on the upper surface of the girder 2a, and has rollers 5 on its inner side surface that are in contact with the side surfaces of the girder 2a. It is configured so that it can run safely along the longitudinal direction of the girder 2a.

Further, on the top surface of this traveling trolley 3, there are connected bins 6, respectively.
Three sets of mounting shoes 8 (8a *
8b, 8c) are fixed in the orientation shown in Figure μ. That is, the central mounting shoe 8a is oriented perpendicularly to the traveling direction of the traveling trolley 3, and the mounting shoes 8b and 8c on both sides thereof are each tilted II j0 with respect to the central mounting shoe 8a, and are symmetrical to each other. It is directed like this.

Then, one K of these mounting shoes 8a to 8C
A guide frame 9 is added to the bin 6 (at the central mounting shoe 8a in the examples shown in FIGS. 1 and 3).

Guide frame 9 is No. 9! As shown in the figure, it is made of a steel material with a cross section shaped like the letter "C" and is formed into a long C-shape that roughly follows the caisson partition wall 1b. That is, the guide frame 9 is integrally and rigidly formed with a plurality of bent parts as nodes, and includes a head 9a located above the traveling bogie 3, and a head 9a located above the traveling bogie 3, and a head 9a extending downward from one end along the side surface of the caisson bulkhead 1b. Extending detour portion 9b
and an arm portion 9C extending obliquely downward from its lower end so as to pass through the lower part of the caisson bulkhead 1b, and having a tip located directly below the bulkhead 1b, and a lower surface of the head 9a. 7th. 2 mounting platinum) 10
&, 10b are provided at a distance from each other, and the guide frame 9 is attached to one of these mounting brackets 10m, 10b (in this figure, the mounting bracket 1 near the detour section 9b).
0a), the bin 6 is connected to a mounting shoe 8a on the upper surface of the traveling carriage 3, and is suspended and supported.

A plurality of sheeps 111 to 11g are attached to predetermined locations on both sides of the guide frame 9, and one wire rope 12 is guided from above along the guide frame V-frame 9 to below the caisson bulkhead 1b. It looks like this. That is, in the head 9a of the guide frame 9, the sheep Ila and ll are mounted on the upper parts of the mounting brackets 10a and 10b, respectively.
b is added, and in the detour portion 9b and arm portion 9c, sheep llc to 11g are mainly attached to the bent portions, respectively.
is installed. In addition, sheep 11f, 11g
is arranged at the tip of the arm portion 9C located directly below the caisson partition wall 1b. Also, Sheep 11f,
11g are arranged so as to be located substantially on the same vertical line as the sheep 11a, 11b of the guide frame head 9a. This is to prevent rotational moment from acting on the guide frame 9 when the wire rope 12 is hung.

Incidentally, the sheep lla to l1g are attached to each attachment point in order to guide μ wire ropes 12 suspended from a winch, which will be described later. That is, as shown in the figure, two sheeps 11 (111 to 11g) are arranged on each side of the guide frame 9 (only one side is shown), and the E-shaped frame 13 and shaft 14 are used to secure the sheeps 11 (111 to 11g) to the sides of the guide frame 9. It is attached to. 15 is a cap for preventing the wire rope 12 from coming off.

Further, a jack 16 is attached to the detour portion 9b of the guide frame 9. When the jack 16 is extended, its tip presses the side surface of the caisson bulkhead 1b, and the reaction force is used to rotate the guide frame 9 in a direction away from the bulkhead 1b using the connecting bin 6 as a fulcrum. .

Next, to briefly describe the situation at the site where the device with the above configuration is actually installed, at this site, the conditions shown in Fig. 7,
As shown in the figure, a ground scaffolding 2 is provided on top of the caisson 1. This ground scaffolding 2 has the above-mentioned girder 2a, and the ground scaffolding 2 has the girders 2a described above, and is able to pass over the rail IC laid on the top surface of the caisson 1.
It is designed to be able to run in the direction of arrow X in the figure. Also,
A rail 2C is provided on the upper surface of the girder 2b at the upper end of the ground scaffolding 2, and a winch mount 17 is provided on the rail 2C so as to be able to move freely in the direction of arrow Y in the figure, and is further provided on the upper surface. A winch truck 19 carrying a winch 1B is provided on the rail 17& so as to be movable in the X direction. As a result, the winch 18
, the pedestal 17 and the scaffold 2 can be moved vertically and horizontally by moving them in the X direction or the Y direction.

In addition, from the winch 18, a wire robe 12 is suspended, and a grab bucket 2 is attached to the tip of the wire robe 12.
0 is added, and the excavator is configured accordingly.

Next, a case where the inside of the caisson 1 described above is actually excavated will be described. The opening 1a is excavated in the usual manner by directly lowering the grab bucket 20 from the winch 18 as shown in FIG. 7, but when excavating directly below the caisson bulkhead 1b, Set up the rope detour device mentioned above and use it to excavate.

First, in order to set the lobe bypass device of the above-described embodiment at the site, move the ground scaffolding 2 shown in FIGS. 7 and 2, and place the girder 2a to be set above the caisson bulkhead 1b. and place the traveling carriage 3 on this girder 2a as shown in Figure 2.

Thereafter, the winch 18 is positioned obliquely above the caisson bulkhead 1b, the grab bucket 20 is lowered onto the excavation surface near the caisson bulkhead 1b, and the wire lobe 12 is lowered onto the excavation surface near the caisson bulkhead 1b.
loosen. In this state, while hoisting the guide frame 9 with a lifting machine (not shown), open the cap 15 of each sheave 11, hang the wire robe 12 on the sheave 11, and close it (
(See Figure 6).

Then, the winch 18 is positioned directly above the caisson bulkhead 1b as shown in FIG. The set is completed by connecting with the bin 6 and suspending and supporting the guide frame 9. In this case, the combination of the connecting mounting brackets xoa, 10b and the mounting shoes 8&-8C may be selected depending on the location to be excavated.

By setting in this way, the winch 18 can bypass the caisson bulkhead 1b that is an obstacle and guide the wire lobe 12 below the bulkhead 1b, even though the winch 18 is located above the bulkhead 1b. partition wall 1b
Therefore, by raising and lowering the wire lobe 12 using the winch 1B in this state, the grab bucket 20 can be directly positioned directly under the bulkhead 1b without being obstructed by the caisson bulkhead 1b. Can be excavated.

Therefore, first, A-B immediately below the partition wall 1b shown with diagonal lines in FIG.
We will discuss the case of excavating the area.

In this case, the first mounting bracket) 10a and the mounting bracket z
-f3 B, and the wire lobes 12 are connected to the upper and lower ends of the sheep 11a as shown by solid lines in FIG.

Multiply by 11f. Then, the traveling truck 3 and the winch 1
8 and excavate directly below the bulkhead 1b from the front. In this case, the grab bucket 20 is separated from the excavation surface by the sheave
Since the excavated earth and sand will be moved up and down within a range of The guide frame 9 is pushed out toward the opening la side of the caisson 1, and the grab bucket 20 is moved to just below the opening 1, and the dirt is dropped there and held there. In addition, at that time, the jack 1
Of course, the digit a itself may be moved instead of 6.

In this way, excavation from point A to point B is performed while performing the excavation operation using the grab bucket 20 and returning the tlkV such as the earth and sand dropping operation.

In addition, if the grab bucket 20 cannot reach the set state described above and dirt remains behind, the setting position of the guide frame 9 is changed and the hooking position of the wire rope 12 is changed. That is, as shown in Fig. 1, the connecting bins 6 are added and removed to disconnect the mounting bracket 10a and the mounting shoe 8a, and the support of the guide frame 9 is temporarily released. The girder 2a on which the traveling carriage 3 is mounted is moved to connect the mounting bracket 10b and the mounting shoe 8a. At the same time, the wire ropes 12 are removed from the sheep IIIL and 11f, and the ropes are changed as shown by the dotted lines in FIG. I'm busy doing this, wire rope 12 at the top end
Since the wire rope 12 at the lower end is aligned approximately on the same vertical line, the guide frame 9 maintains its balance.

Next, we will discuss the pressure when excavating just below the intersection (corner) of the caisson bulkhead 1b, such as parts C and D in FIG. In the case of
Set to . Then, the guide frame 9 becomes the partition wall 1b.
If it is located in a direction tilted to 4e j',
The grab bucket 20 can be delivered directly below the intersection (points C and D).

In this way, when the excavation immediately below the four partition walls 1b surrounding the opening 1a is completed, the earth and sand accumulated immediately below the opening 1a is lifted up. In this case, the rope detour WFi is removed and the soil is lifted by performing the normal excavation operation shown in FIG.

In the embodiment described above, the guide frame 9 is integrally formed, and the arm portion 9C has a structure that does not move.
Further, in order to change the excavation position, two sheep llf and //g are provided at the tip of the arm, and as shown in FIG. The guide arm 9' may be configured to be connected by a pin 21 and whose rotation angle can be adjusted by a hydraulic cylinder 22. In this way, by providing only one sheep 11f' and changing the angle of the arm portion 11C/, the same effect as in the previous embodiment can be achieved. In this case, there is no need to change the hooking position of the wire rope 12 even when the grounding position is extended, which is convenient. In addition, it can be easily adapted to differences in the shape of obstacles, widening the range of applications.

Further, in the above embodiments, the apparatus of the present invention was applied to a winch type excavator, but it can be similarly applied to a crawler crane type excavator.

Further, in the above embodiment, the guide arm is constructed in one piece, but if the guide arm is to be long, it may of course be of a split type.

As explained above, according to the present invention, a cart is provided above an obstacle so as to be horizontally movable, and the cart is formed such that it extends downward to bypass the obstacle and its tip is positioned directly below the obstacle. A guide frame was installed, multiple sheep were added to this guide frame, and the rope for suspending the grab bucket was guided along the guide frame directly below the obstacle. can be excavated directly with a grab bucket.

[Brief explanation of drawings]

Figure 1 is for explaining a construction site using the open caisson construction method, which is an example of a site where the device of the present invention is used, in which (a) is a plan view, (b) is a front sectional view, and (c) is a front sectional view. is a side sectional view, Figures 1 to 1 are for explaining one embodiment of the present invention, Figure 2 is an overall front view, Figure 3 is a side view of the same, and Figure μ is a mounting shoe. Figure 5 is a diagram showing the cross-sectional shape of the guide frame, Figure 5 is a diagram showing the mounting structure of the sheep, Figure 7 is a front view showing the equipment at the construction site of the open caisson construction method, Figure 1 is a plan view of the same, Figure 1 is an overall front view showing one embodiment of the present invention set at the construction site, and Figure 1O is a front view showing main parts of another embodiment of the invention. It is a diagram. 1b... Caisson bulkhead (obstacle), 3...
...Traveling trolley, 11.11a-l1g...Sheep, 18...Winch, 20...Grab bucket. Figure 10

Claims (1)

[Claims] A device that guides the rope of a grab-bucket-suspended excavator directly below the obstacle by bypassing the obstacle when excavating directly below the obstacle, and the trolley is horizontally movable above the obstacle. and a guide frame that is added to the truck and extends downward and is rotated from the side of the obstacle so that the tip thereof is located directly below the obstacle, and the guide frame includes a tip portion thereof. A detouring device for a grab bucket hanging rope, comprising a plurality of rope guiding sheeps added at predetermined locations along a guide frame.