JP2000017999A - Timbering erection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly separate a gripped timbering and to erect it near a working face. SOLUTION: This timbering erection device 1 comprises a mounting main body 3 secured to the end of a derricking arm, an oscillating element 6 freely rotationally connected to the end of the mounting main body 3, and gripping mechanisms 7, 7 mounted at both ends of the oscillating element 6. The gripping mechanism 7 comprises a casing 11 secured to the oscillating element 6, a grip main body 12 enclosed in the casing 11, and a pair of pawls 14, 14 freely rotationally attached to the grip main body 12. The grip main body 12 can reciprocate within the casing 11 by actuating an expansion cylinder 21. The pair of pawls 14, 14 can be opened and closed by an opening/closing cylinder, and when the grip main body 12 is advanced, the pair of pawls 14, 14 clamp and grip timbering 19. When the grip main body 12 is moved back, the pair of pawls 14, 14 are retreated into the casing 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoring installation device mainly used for shoring in tunnel construction.

[0002]

2. Description of the Related Art When performing tunnel construction, a TB
While excavating using M (tunnel boring machine) or the like, it is necessary to stabilize the ground at the site of the excavation by sequentially building steel supports from the place where the excavation is completed.

Here, in order to prevent loosening of the ground immediately after the excavation, it is desirable that the shoring be installed from a place as close to the face as possible. Work must be avoided as much as possible.

[0004] From this point of view, a number of devices have been developed that can support the shoring without human intervention (see, for example, JP-A-8-303197).

[0005]

Here, when the shoring is erected, the arm of the base machine is operated while the shoring is grasped, and the shoring is pressed against the excavation wall surface. After stopping or fixing, the procedure of releasing the grasped shoring will be repeated, but due to the arm operation, it is difficult to apply only a straight pressing force to the digging wall on the shoring, and in practice, it is difficult Often lateral forces also act on the shoring.

[0006] Therefore, even if the grasped shoring is to be released after being erected, the lateral force which has been acting on the shoring is released, and the tip of the arm instantaneously moves laterally. For this reason, there has been a problem that the locking mechanism of the device is caught by the support and the support cannot be released smoothly.

Further, in the conventional apparatus, since the arm of the base machine needs to be operated so as to be directly in front of the excavation wall, that is, the arm axis of the arm is required to be orthogonal to the excavation wall, the entire cross section of the tunnel is required. There has been a problem that the shoring cannot be built until after excavation, or that the shoring can be built only at a place distant from the face to some extent.

The present invention has been made in view of the above-mentioned circumstances, and provides a shoring construction device capable of smoothly releasing a shoring that has been grasped and erection near the face. The purpose is to do.

[0009]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a shoring and mounting apparatus which is fixed to a tip of an undulating arm provided in a lifting machine. A main body, an oscillating body which is swingably mounted around a tip of the mounting main body by a predetermined oscillating driving means, and gripping mechanisms respectively attached to both ends of the oscillating body; A casing fixed to the rocking body, a grip body reciprocally mounted on the casing by a predetermined telescopic drive means, and a pair of claws disposed opposite to the grip body so as to be openable and closable by a predetermined open / close drive means; And projecting the pair of claws from a claw opening formed in the casing when the grip main body is advanced, to clamp a support between the pair of claws and a contact surface of the casing. Rutotomoni, which is constituted so as to be retracted into the casing when retracting the gripping body.

[0010] Further, the shoring installation device according to the present invention,
A predetermined guide body protrudes from the rocking body, and the guide body is
The support is guided to a predetermined clamping position in accordance with the pulling operation of the support by the pair of claws.

[0011] In addition, the shoring installation device according to the present invention,
The mounting body is configured such that the swinging body is swingable in a vertical plane perpendicular to a vertical plane including a material axis of the undulating arm.

In the shoring installation apparatus according to the present invention, first, the oscillating drive means is appropriately operated in accordance with the gripping position of the shoring to tilt the oscillating body. For example, in a case where two curved supports are connected to each other at the top of the tunnel, when the support is gripped near the top, the rocking body is not tilted so much, and the tilt angle is about 45 degrees. When the part is grasped, the rocking body is also inclined by about 45 degrees accordingly. In any case, the angle of the rocking body is adjusted so that the supporter can be hung in the same posture as the built-in posture regardless of which part is grasped.

Next, the grip body is advanced to project a pair of claws from a claw opening formed in the casing, and then the grip body is retracted reversely while the pair of claws are engaged with the support, thereby supporting the support. The work is drawn and sandwiched between the contact surface of the casing and the support is grasped. In addition, the work of grasping the supporter may be performed after the angle adjustment of the rocking body has been completed, or an appropriate place of the supporter may be grasped first, and then this may be lifted by a lifting machine. The angle of the rocking body may be adjusted so as to be the same as the standing posture.

Here, a predetermined guide body is protruded from the rocking body, and the guide body is guided to a predetermined clamping position by the pulling operation of the support by the pair of claws. If it is configured so as to grasp the shoring, if the gripping mechanism is brought close to the shoring to some extent, the guide body is then moved along with the pulling operation of the shoring by the pair of claws. Since the guide is guided to the predetermined sandwiching position, the operation accuracy of the lifting machine and its up-and-down arm is reduced, and as a result, the efficiency of installation can be improved.

Next, the suspended supporter gripped by the gripping mechanism is pressed against the erected position on the side of the tunnel excavation, and the supporter is fixed or temporarily fixed in this state.

Next, while the support is pressed against the digging side, a pair of claws are opened to remove the claws from the support, and then,
The grip body is retracted to retract the pair of claws into the casing.

Next, the gripping mechanism is separated from the support by operating the raising / lowering arm or the lifting machine.

With this arrangement, even if a lateral force acts between the support and the gripping mechanism, when the lateral force is released, the pair of claws are already retracted in the casing. The gripping mechanism separates smoothly from the shoring.

The lifting machine may be any machine that can lift a heavy object. For example, a hydraulic excavator or a hydraulic backhoe bucket may be removed,
Instead, the shoring installation device of the present invention can be attached and used.

The mounting body may be arbitrarily configured, but the mounting body is configured such that the swinging body is swingable in a vertical plane perpendicular to the vertical plane including the material axis of the undulating arm. Then, it becomes possible to build a support while the lifting arm of the lifting machine is parallel to the excavation wall, and the lifting machine itself is kept away from the face to secure the safety of workers, The shoring can be built, and the shoring can be built even when, for example, the right half of the tunnel is not excavated.

The configuration of the mounting body capable of performing such a function is determined in consideration of the performance of the up-and-down arm, and is arbitrary. Such a configuration as to do is conceivable.

Each of the swing driving means, the expansion / contraction driving means, and the opening / closing driving means can be constituted by, for example, a hydraulic actuator.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a shoring installation device according to the present invention. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

FIGS. 1 and 2 are front and side views, respectively, of a shoring installation apparatus according to this embodiment. As can be seen from these figures, the shoring / building apparatus 1 according to the present embodiment includes a mounting body 3 fixed to the tip of an undulating arm 2 provided in a lifting machine (not shown), and a pin 5 attached to the tip of the mounting body. Oscillator 6 rotatably connected via
And gripping mechanisms 7, 7 attached to both ends of the rocking body, respectively.

Here, the oscillating body 6 includes an oscillating cylinder 4 as oscillating driving means provided between the oscillating body 6 and the mounting body 3.
4 allows the pin 5 to swing around the pin 5. The oscillating body 6 can be formed of, for example, a square hollow steel pipe.

As shown in FIG. 2, the mounting body 3 is formed by bending the swinging body 6 so as to be swingable in a vertical plane perpendicular to the vertical plane including the material axis of the undulating arm 2. is there.

As can be clearly understood from the detailed view of FIG. 3, the gripping mechanism 7 has a casing 11 fixed to the oscillator 6 by welding or the like.
And a pair of claws 14, 14 rotatably mounted via pins 13 to the grip body 12 housed in the casing.

The casing 11 includes a pair of opposed side plates 1.
5 and 15 are connected by connecting plates 16 and 16, the box-shaped hollow space is used as an arrangement space for the grip body 12, and a top plate 18 having a claw opening 17 formed thereon is disposed above the box-shaped hollow space.

Here, the inner surfaces of the side plate 15 and the connecting plate 16 act as sliding guide surfaces for guiding the reciprocating movement of the grip body 12. Further, the outer surface of the top plate 18 acts as a contact surface with a support 19 made of H-shaped steel.

The grip body 12 is provided on the side plate 1 of the casing 11.
5 and 15 are connected to a telescopic cylinder 21 as a telescopic driving means connected by pins 20 so that the casing 11 can be reciprocated in the direction of the arrow in FIG. It has become.

The pair of claws 14, 14 can be opened and closed in the direction indicated by the arrow in FIG. 1 by an opening / closing cylinder 22 serving as an opening / closing driving means connected to the opposite side of the pin 13. When advanced, the casing 1
A pair of claws 1 through the claw openings 17 formed in the top plate 18
4 and 14 are protruded so that a support 19 is sandwiched between a top plate 18 which is an abutting surface of the casing and is gripped.
It is configured to be evacuated inside.

On the other hand, the swinging member 6 has a triangular plate-shaped guide member 2.
3 is protruded, and is supported by a pair of claws 14, 14.
In accordance with the pulling operation of 9, the shoring is guided to a predetermined clamping position, that is, to the top plate 18 constituting the contact surface.

In the shoring installation device 1 according to the present embodiment, first, the oscillating cylinders 4 and 4 are appropriately operated in accordance with the gripping position of the shoring 19 to tilt the oscillating body 6. For example, when grasping an intermediate portion (a portion having an inclination angle of about 45 degrees) of the curved support 19, the swing cylinder 4,
By actuating 4, the rocking body 6 is also inclined by about 45 degrees so that the supporter 19 is suspended in the same posture as the built-in posture.

Next, the work for grasping the supporter 19 will be started. If the supporter is temporarily placed in a tunnel, for example, in a posture of grasping from the side, the undulating arm 2 is moved as shown in FIG. Activate the gripping mechanism 7 to make it horizontal.

Next, as shown in FIG. 5 (a), the gripping mechanism 7 is brought closer to the laterally placed supporter 19 by operating the raising / lowering arm 2 or by moving the lifting machine (not shown) forward. Here, it is not necessary to delicately operate the hoisting arm 2 or the lifting machine until the supporter 19 comes into contact with the top plate 18 of the casing 11 which is the contact surface.
Suffices to approach the inside of the guide body 23.

Next, as shown in FIG. 2B, the grip body 12 is advanced along the inner surfaces of the side plates 16 by operating the telescopic cylinder 21. Then, the pair of claws 14 project from the claw openings 17 formed in the top plate 8 of the casing 11.

Next, the pair of claws 14 and 14 are closed by operating the opening / closing cylinder 22 and the grip body 12 is retracted in the reverse direction, so that the flange of the support 19 is locked by the claws 14 and 14. Attract the shoring.

At this time, the shoring 19 includes a pair of claws 14,
In accordance with the pulling operation of the casing 14, the guide 19 is guided along the guide body 23 to the clamping position, that is, the top plate 8, which is the contact surface of the casing 11.
(FIG. 3 (c)).

Next, the suspended support 19 gripped by the gripping mechanism 7 is suspended in the same posture as the built-in posture by raising the up-and-down arm 2, and then the up-and-down arm 2 is lifted, for example. By turning, it is pressed against the erected position of the tunnel excavation side surface 30 as shown in FIG.

FIGS. 7 and 8 show how the lifting machine 2 is turned by operating the lifting machine 33 using the hydraulic backhoe as a base machine, and the support 19 is pressed against the side of the excavation. As can be clearly seen in FIG.
The middle part of the curved support 19 (the inclination angle is about 4
5), the swinging body 6 is tilted by about 45 degrees by operating the swinging cylinders 4 and 4 and suspended in the same attitude as the built-in attitude.
To the excavation wall.

Next, as shown in FIG. 8, the shoring 19 is temporarily fixed to the already fixed shoring 32 via a jig 31. As shown in FIG. 7, the temporary fixing may be appropriately removed after being connected to the other support 19a separately built at the top.

Next, as shown in FIG. 9A, the pair of claws 14, 14 are opened by operating the opening / closing cylinder 22 while the support 19 is pressed against the side of the excavation. remove. Next, as shown in FIG. 2B, the gripping main body 12 is moved backward by operating the telescopic cylinder 21, and the pair of claws 1 are moved.
4 and 14 are retracted in the casing 11. At this stage, the support 19 is still pressed against the excavation wall 30 by the undulating arm 2.

Next, the gripping mechanism 7 is separated from the support 19 by, for example, turning the undulating arm 2 in the reverse direction.

In this way, even if a lateral force is applied between the support 19 and the top plate 8 of the gripping mechanism 7, when this force is released, the pair of claws 14, 14 are released.
Is already retracted in the casing 11, so that the gripping mechanism 7 smoothly separates from the support 19.

As described above, according to the shoring and erection apparatus 1 according to this embodiment, the pair of claws 14 for holding the shoring 19 are attached to the holding body 12, and the holding body 12 is attached to the holding body 12. Since the reciprocating motion is performed by the telescopic cylinder 21, when grasping the support, the grip body is advanced to project the pair of 14, 14, and when the support is released, the support is retracted in the opposite direction. The pair of claws 14, 14 are attached to the casing 11.
Can be evacuated inside.

Therefore, even if a lateral force is applied between the support 19 and the top plate 8 of the gripping mechanism 7, when the force is released, the pair of claws 14, 14 are already in the casing 11. The arm tip moves to the side at the moment when the lateral force acting on the support is released, which causes the locking mechanism of the device to be supported. Such a situation that the work is not caught by the work does not occur, and the support 19 can be smoothly separated, and as a result, the work efficiency of building the support can be greatly improved.

Further, according to the shoring installation apparatus 1 according to the present embodiment, the guide 23 is protruded from the rocking body 6, and the shoring 19 is pulled by the pair of claws 14, 14. Since the supporter is configured to guide the supporter to a predetermined clamping position in accordance with the operation, when the supporter 19 is gripped, if the gripping mechanism 7 is brought close to the supporterer to some extent, the guide body 23 is Since the supporter is guided to the predetermined clamping position in accordance with the pulling operation of the supporter 19 by the pair of claws 14, 14, the operation accuracy of the lifting machine and its undulating arm 2 is reduced, and as a result, Efficiency can be improved.

Further, according to the shoring / building apparatus 1 according to the present embodiment, the mounting body is provided so that the swinging body 6 can swing freely in a vertical plane perpendicular to the vertical plane including the material axis of the undulating arm 2. 3 was formed by bending, the lifting arm 2 of the lifting machine
Can be erected in a state in which is parallel to the excavation wall (the state of FIGS. 7 and 8).
It is possible to build the shoring 19 immediately before the face 34 while keeping the worker away from the face 34 and to secure the worker's safety. As can be imagined from FIG. The construction of the construction 19 becomes possible.

[0049]

As described above, according to the shoring and erection apparatus of the first aspect of the present invention, even if a lateral force acts between the shoring and the gripping mechanism, this is achieved. When released, the pair of claws are already retracted in the casing, so that the support can be smoothly released.

According to the second aspect of the present invention, when the shoring is to be grasped, if the gripping mechanism is brought close to the shoring to some extent, the guide body is formed by a pair of claws. Since the shoring is guided to a predetermined clamping position in accordance with the pulling operation of the shoring, the operating accuracy of the lifting machine and its up-and-down arm is reduced, and as a result, the improvement of the installation efficiency can be achieved. It also has an effect.

According to the third aspect of the present invention, the shoring can be erected with the undulating arm of the lifting machine being parallel to the excavation wall.
The lifting machine itself can be installed away from the face to secure the worker's safety, and the shoring can be built just before the face, and the shoring can be built even if the right half of the tunnel is not excavated, for example. Also has the effect.

[0052]

[Brief description of the drawings]

FIG. 1 is a front view of a shoring installation device 1 according to the present embodiment.

FIG. 2 is a side view of the shoring installation device 1 according to the embodiment.

FIG. 3 is a detailed sectional view of the gripping mechanism 7 along the line AA in FIG. 1;

FIG. 4 is a diagram illustrating a procedure for using the shoring installation device 1 according to the embodiment.

FIG. 5 is a cross-sectional view of the gripping mechanism 7, which continuously describes a procedure for gripping the temporarily placed supporter 19;

FIG. 6 is a cross-sectional view of the gripping mechanism 7 showing a state in which the gripped supporter 19 is pressed against the excavation wall surface 30.

FIG. 7 is an overall front view showing a state in which a grasped supporter 19 is pressed against an excavation wall surface.

FIG. 8 is an overall side view of the same.

FIG. 9 is a cross-sectional view of the gripping mechanism 7 showing a state in which a temporarily fixed or fixed supporter 19 is released.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shoring construction apparatus 2 Undulating arm 3 Mounting main body 4 Oscillating cylinder (oscillating driving means) 6 Oscillating body 7 Gripping mechanism 11 Casing 12 Gripping main body 14 Claw 17 Claw opening 18 Top plate (contact position, pinch of shoring) (Positioning position) 21 Cylinder for expansion and contraction (drive means for expansion and contraction) 22 Cylinder for opening and closing (drive means for opening and closing) 23 Guide body

Claims (3)

[Claims] 1. A mounting body fixed to a tip of an up-and-down arm provided on a lifting machine, a rocking body pivotally mounted around a tip of the mounting body by a predetermined rocking driving means, Gripping mechanisms respectively attached to both ends of the moving body, wherein each of the gripping mechanisms includes a casing fixed to the oscillating body and a gripping body installed reciprocally in the casing by a predetermined telescopic drive means. And a pair of claws arranged to be openable and closable by the opening / closing drive means so as to be opposed to the grip body, and the pair of claws are moved from a claw opening formed in the casing when the grip body is advanced. It is characterized in that it is configured to protrude to clamp the support between the contact surface of the casing and to be retracted in the casing when the grip body is retracted. Shoring construction equipment. 2. A predetermined guide body is protruded from the rocking body,
2. The shoring installation device according to claim 1, wherein the guide body is configured to guide the shoring to a predetermined clamping position in accordance with the pulling operation of the shoring by the pair of claws. 3. The shoring installation device according to claim 1, wherein the mounting body is configured so that the oscillating body can oscillate in a vertical plane perpendicular to a vertical plane including a material axis of the undulating arm. .