JPH0423119Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a stopper device for a launching truck in a caisson yard.

[Prior Art] In a caisson yard, a launching cart for launching a caisson is connected to a rope fed out from a winch so as to be suspended from the winch, and is configured to be movable up and down (diagonally). If a caisson is placed on a launching cart suspended from a rope, the rope will be under high tension and the launching cart will wobble, which is dangerous. The caissons are placed in place after they are secured.

FIG. 4 shows an example of a conventional stopper device. That is, this stopper device is disposed in a pit a recessed in a caisson yard, and has a stopper part b for engaging with a hook part p of a launching truck o.
A first lever c, a second lever d that engages with the first lever c, a third lever e that engages with the second lever d, and a fourth lever f that engages with the third lever e are rotatable. Further, a release mechanism as shown in FIG. 5 is connected to the rotating end of the fourth lever f via a rope g and a sheave h.
This release mechanism includes an arm j rotatably attached to a base bracket i connected to a rope g.
and a protrusion k at the tip which is pivotally connected to the middle part of the arm j.
It consists of an operating lever l provided with a projection k, a fixing pin m that engages with a protrusion k, and a detachable pin n that regulates the position of the operating lever l.

When placing the caisson on the launching truck o, each lever c, d, e,
This is carried out with the hook part p of the launching truck o engaged with the stopper part b of the first lever c. On the other hand, when launching the caisson, the operating lever l of the release mechanism is moved to the pin n.
By rotating it downward after removing it, arm j is pulled by rope g and rotates.
Each of the levers c, d, e, and f is rotated as shown by the imaginary lines in FIG. 1, and the engagement between the stopper part b and the hook part p is released.

[Problems to be solved by the invention] However, in such a conventional stopper device, each lever c, d,
Because e and f had to be assembled, it was very troublesome and inefficient.

There is also a mechanism for moving the stopper up and down using a hydraulic cylinder, but in this case, the pit a must be made large and deep, and it cannot be directly applied to the lever-type pit a.

The present invention was developed in view of these circumstances.

[Means for Solving the Problems] In the present invention, a holding frame is disposed in the pit so as to be rotatable in a direction perpendicular to the moving direction of the launching truck, and a holding frame is placed on the holding frame. A stopper jack is installed which projects from and retracts from the upper edge of the pit when rotated, engages with the hook portion of the launching truck when projected, and receives the load from the launching truck.

[Operation] Therefore, the load from the launching truck side is received by the stopper jack, and on the other hand, when the holding frame is rotated, the stopper jack is removed from the movement locus of the hook portion of the launching truck.

[Examples] Examples of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 3, in the pit 1,
A holding frame 3 is disposed parallel to the moving direction (arrow X) of the launching truck 2, and shafts 4 are provided protruding from the front and rear surfaces of the holding frame 3, respectively. The holding frame 3 is supported by a bearing 5 provided at a portion thereof, and is constructed so that the holding frame 3 can rotate in a direction perpendicular to the direction of movement of the launching truck 2. Further, a stopper jack 6 is installed upward on the holding frame 3, and the stopper jack 6 can slide along a guide 7 attached to the tip of the stopper jack 6 on the holding frame 3 in parallel to the moving direction of the launching cart 2. The rear surface of the shuttle 8 is brought into contact with the front surface of the shuttle 8, and the hook portion 9 of the launching truck 2 can be engaged with the front surface of the shuttle 8. Further, a jack 10 for rotating the holding frame 3 is installed on either the left or right side wall of the pit 1, and the tip of the jack 10 is connected to a required location on the lower end of the holding frame 3, When the above-mentioned jack 10 is operated to rotate the holding frame 3, the stopper jack 6 and the shuttle 8 are designed to protrude and retract from the upper edge of the pit 1. The shuttle 8 is used to absorb the eccentric moment caused by uneven contact between the propulsion truck 2 and the stopper jack 6, so it is not necessary when there is no uneven contact (the load working center is coincident).

In the figure, 11 is a rope for raising and lowering the launching cart 2, and is let out from a winch (not shown).

Now, with the hook portion 9 of the launching truck 2 engaged with the shuttle 8 and the shuttle 8 being received by the stopper jack 6, a caisson (not shown) is placed on the launching truck 2. The load of the caisson is transmitted from the hook portion 9 to the stopper jack 6 via the shuttle 8, and further from the holding frame 3 to the side wall portion of the pit 1. Therefore, the above-mentioned load does not act on the rope 11.

When launching the caisson from this state, the winch is driven to tension the rope 11, and then the jack 6 is operated to the end of the stroke in the retraction direction to form a gap between the hook portion 9 and the shuttle 8. After that, operate the jack 10 to rotate the holding frame 3 and press the stopper jack 6.
Then, the shuttle 8 is removed from the movement trajectory of the hook portion 9 and stored (see FIG. 3).

Then, by driving the winch and letting out the rope 11, the launching cart 2 is lowered and the caisson is launched.

In the above, when the caisson is placed on the launching truck 2, the load of the caisson is applied to the rope 11 by extending the stopper jack 6 and sliding the shuttle 8 upward appropriately to leave the rope 11 in a slack state. This prevents the launching cart 2 from wobbling. Further, since the load of the caisson is transmitted to the stopper jack 6 via the shuttle 8, the load is applied entirely to the end surface of the stopper jack 6, thereby preventing the occurrence of an uneven load.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, as shown by the two-dot chain line in FIG. Of course, various modifications may be made without departing from the gist of the present invention.

[Effects of the invention] As explained above, according to the stopper device of the invention, (1) handling is easy and safe;

(2) Overall, the number of parts is small and the size is small.
The pit needs to be small.

It can produce excellent effects such as

[Brief explanation of the drawing]

Figure 1 is a side view of the stopper device of the present invention, Figure 2 is a side view of the stopper device of the present invention;
The figure is a plan view of figure 1, figure 3 is a front view of figure 1,
FIG. 4 is a side view showing an example of a conventional stopper device, and FIG. 5 is a diagram showing a release mechanism in the conventional stopper device. 1 is a pit, 2 is a launching cart, 3 is a holding frame, 4 is a rotating shaft, 5 is a bearing, 6 is a stopper jack, 7 is a guide, 8 is a shuttle, 9 is a hook part,
10 indicates jealousy.

Claims (1)

[Scope of utility model registration request] A holding frame is disposed within the pit so as to be able to rotate in a direction perpendicular to the direction of movement of the launching cart, and
A stopper jack is installed on the holding frame, which protrudes and retracts from the upper edge of the pit as the holding frame rotates, engages with the hook portion of the launching cart when it is projected, and receives the load from the launching cart. Features: Stopper device for launching bogies in caisson yards.