JP2527367Y2 - Hammer separation device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a method for dropping and compacting a heavy hammer on a soft ground having a weak ground support to convert the hammer into a strong ground. The present invention relates to a hammer separating device for dropping a hammer at a height.

[0002]

In the above-mentioned method, a hammer having an extremely large weight is held by a clamp attached to the tip of a wire such as a crane, lifted, dropped from a high place, and hit by the hammer. It compacts the ground around the impact point of the ground and in the depth direction. The clamp is usually opened and closed by a hydraulic cylinder in order to perform the work of dropping the hammer efficiently and repeatedly from a predetermined height.However, the conventional clamp cannot be opened and closed smoothly due to the large weight of the hammer. There was a drawback.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and as a result of various studies, has been made to provide a hammer separating device capable of smoothly dropping a hammer.

That is, the present invention provides an L-shaped support having a vertical arm and a horizontal arm, each of which has a vertical arm and a horizontal arm and is opened inward and downward from each other at the center of each of two scissor-shaped movable legs which are opened and closed by a hydraulic cylinder driven by air pressure for an air cylinder. The hammer holding bracket having the outer end engaged with the lower end of the vertical arm of the L-shaped support and the inner end provided with a tapered surface is substantially V-shaped. It has an air cylinder which is rotatably attached to the lower part of both movable legs so as to form a mold portion, and further has a weight attached above the both arms of the L-shaped support above which strikes these arms. When the hammer is lifted to a predetermined height by holding the round bar hanging hook fixed to the hammer at the substantially V-shaped portion, the air cylinder is driven to strike the lateral arm of the L-shaped support bracket with the weight. Vertically The lower end is characterized in that to fall by its own weight hammer by out of engagement with the hammer supporting brackets.

[0005]

As described above, since the hammer is dropped by hitting the L-shaped support bracket with the air cylinder, the holding of the hammer can be released in a very short time as compared with a conventional drop mechanism using a hydraulic cylinder or the like. Therefore, the hammer can be reliably dropped in a stable state. In addition, the contact portion between the hammer and the separating device is configured to support the hammer hanging hook formed of a round bar having a circular cross section with a substantially V-shaped portion formed by both tapered surfaces of both the hammer holding brackets as described above. Therefore, when the hammer falls, a smooth falling operation can be obtained. Further, due to such a structure, there is an advantage that abrasion between the hanging hook of the hammer and the substantially V-shaped portion is extremely reduced.

In the separating device of the present invention, a hydraulic cylinder is used only for opening and closing both scissor-shaped movable legs. Since a large force can be obtained by the hydraulic cylinder, the hammer supporting brackets at both ends of the movable legs catch the hook of the hammer, support the hook with the substantially V-shaped portion, and lift the hammer when the hammer is lifted. This prevents a problem that both movable legs are opened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. As shown in FIGS. 1 and 2, inside a fixing frame (2) for a disconnecting device having a mounting hole (1) for a lifting device for lifting with a crane or the like at the upper end, two lower opening / closing scissors are provided. Movable leg
(3) The upper end of (3) was rotatably mounted.

Further, a support rotation shaft (7) is provided at the center of the movable legs (3) (3) at the corner of an L-shaped support (6) having a vertical arm (4) and a horizontal arm (5). Thus, the L-shaped support (6) is rotatable around its corner. And the side arm of this L-shaped support (6)
The weight (9) attached to the tip of the air cylinder (8) installed at the center of the fixed frame (2) is in contact with the upper end surface of (5). The lower end of the vertical arm (4) is engaged with the hammer holding bracket (10),
When (8) is not operating, the above-mentioned engaged state is maintained by the coil spring (11) pulling the horizontal arm (5) upward.

The hammer holding bracket (10) is rotatably mounted on each of the movable legs (3) and (3), and the inner upper surfaces thereof are formed as tapered surfaces. As shown in FIG. (3)
In the closed state, the tapered surfaces of the two hammer holding brackets (10) form a substantially V-shaped portion (12). An arc-shaped convex surface (6 ') at the lower end of the vertical arm (4) of the L-shaped support (6) is detachably engaged with the outer upper end surface of the holding bracket (10). A concave surface (10 ') was provided.

Although not shown in FIG. 1, the support rotary shaft (7) of the L-shaped support (6) attached to the movable legs (3) (3).
By attaching two hydraulic cylinders (13) (13) between (7), both movable legs (3) (3) are opened and closed. This hydraulic cylinder is further enhanced by using the air pressure obtained by the air compressor that drives the air cylinder (for example, the air pressure of 7 kg / cm ² is increased 100 times to 700 kg / cm ² ). Since it can be used, a normal hydraulic pump or the like is unnecessary. Therefore, with such a hydraulic cylinder, it is possible to keep the movable legs (3) (3) closed at a high pressure.

Therefore, as shown in FIGS. 1 and 2, when the lifting hook (15) of the hammer (14) is held by the substantially V-shaped portion (12) of the hammer support fittings (10), (10). With the weight of), the movable legs (3) and (3) exert a force to open them,
According to the pressure of the hydraulic cylinders (13) and (13), this can be prevented, so that the hammer (14) can be lifted to a high place in the state of FIGS.

FIG. 3 shows a state in which the movable legs (3) and (3) are opened by operating the hydraulic cylinders (13) and (13). That is, to lift the hammer (14) placed on the ground, the movable legs (3) and (3) are opened and the hook (15) is straddled, and then the hydraulic cylinders (13) and (13) are actuated again to move the movable legs (3) and (13). By closing (3), (3), the hammer (14) can be held as shown in FIG. If the upper part of the hook (15) is formed in a semicircular shape as shown in FIG.
The hook (15) can be attached and detached by the separating device from any direction within the plane.

Next, a method of dropping the hammer after the hammer is lifted by the separating device will be described. As shown in Fig. 1, both movable legs (3) and (3) are tightly closed with a hydraulic cylinder, and the hammer hook (15) is held by the substantially V-shaped portions (12) of both hammer holding brackets (10) and (10). In this state, the hammer (14) is lifted upward. When the predetermined height is reached, the hydraulic cylinder is still driven with the movable legs (3) and (3) closed, and the air cylinder (8) is driven by the weight (9) at the tip of the air cylinder (8). (6) Hit the upper end surface of the lateral arm (5) (5) of (6). As shown in FIG. 4, the impact force causes the L-shaped supports (6) and (6) to rotate around the supporting rotation axes (7) and (7), and therefore, the convex surface (6 ') at the lower end of the vertical arm (4). The hammer (14) is disengaged from the concave surface (10 ') of the hammer holding fitting (10), so that the hook (15) falls by its own weight while rotating the hammer holding fitting (10). As described above, the hook of the hammer is cut off by the instantaneous operation of the air cylinder at the time of the fall, so that the abrasion due to the contact between the hook and the substantially V-shaped portion is extremely reduced.

[0014]

As described above, according to the present invention, the hammer can be separated instantaneously by using the air cylinder, so that the disconnection resistance is very small as compared with the conventional hydraulic disconnection. This has the effect of greatly reducing the wear of the contact portion with the hammer, and the hydraulic pressure for holding the hammer uses the air pressure obtained by the air compressor for the air cylinder, thus eliminating the need for a large-scale device such as a hydraulic pump. effective.

[Brief description of the drawings]

FIG. 1 is a front view showing a separating device according to an embodiment of the present invention.

FIG. 2 is a side view showing the separating device according to the embodiment of the present invention;

FIG. 3 is a front view showing a state in which a movable leg is opened in the separating device according to the embodiment of the present invention;

FIG. 4 is a front view showing an operation state when an air cylinder is driven in the separation device according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting hole 2 Fixed frame 3 Movable leg 4 Vertical arm 5 Lateral arm 6 L-shaped support 6 'Convex surface 7 Support rotation axis 8 Air cylinder 9 Weight 10 Hammer holding bracket 10' Concave surface 11 Coil spring 12 Substantially V-shaped part 13 Hydraulic cylinder 14 hammer 15 hook

Claims (1)

(57) [Scope of request for utility model registration] 1. A scissor-shaped movable leg which is opened and closed by a hydraulic cylinder driven by air pressure for an air cylinder. Parts are rotatably mounted, and the outer end is engaged with the lower end of the vertical arm of the L-shaped support, and the hammer holding metal fitting provided with a tapered surface at the inner end is substantially V-shaped with these tapered surfaces facing each other. An air cylinder which is rotatably attached to the lower portions of both movable legs so as to form the above, and further has a weight attached above the both lateral arms of the L-shaped support, which strikes these lateral arms. After holding the round bar hanging hook fixed to the hammer at the substantially V-shaped portion and lifting the hammer to a predetermined height, the air cylinder is driven to strike the horizontal arm of the L-shaped support bracket with the weight, and the vertical arm The bottom is hang A hammer separating device characterized in that the hammer is dropped by its own weight by being disengaged from the hammer holding bracket.