JPH0542322U - Hammer disconnecting device - Google Patents

Abstract

(57) [Summary] [Purpose] The hammer can be dropped instantly and smoothly in the weight drop compaction method. [Composition] Vertical arm (4) is attached to the center of each scissor-shaped movable leg (3) that opens and closes with a hydraulic cylinder driven by air pressure
And L-shaped support which has lateral arms (5) and opens inward and downward from each other
The corners of (6) are rotatably attached, the outer ends engage the lower ends of the vertical arms of the support, and the hammer holding metal fittings (10) provided with tapered surfaces on the inner ends are made to face each other. (9) which is rotatably attached to the lower portions of both movable legs so as to form a substantially V-shaped portion (12) and strikes the lateral arms above the lateral arms of the L-shaped support. It has an air cylinder (8) with a
A hammer detaching device that holds the hook (15) of (14) and lifts it to a predetermined height, and then when the lateral arm is hit with an air cylinder, the lower end of the vertical arm comes off from the hammer holding metal fitting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is used in the weight drop compaction method to drop a heavy hammer on a soft ground with weak ground support to make it a solid ground.Hold the hammer to be lifted and drop the hammer at a predetermined height. It relates to a hammer detaching device.

[0002]

[Problems to be solved by conventional techniques and devices]

 In the above method, a hammer with an extremely large weight is held by a clamp attached to the tip of a wire such as a crane and lifted, dropped from a high place, and the hammer is hit around the impact point of the ground and in the depth direction. It compacts the ground. The clamp is normally opened and closed by a hydraulic cylinder in order to efficiently and repeatedly drop the hammer from a predetermined height, but the conventional one cannot open and close smoothly because the hammer is heavy. There was a drawback.

[0003]

[Means for Solving the Problems]

 As a result of various studies in view of this, the present invention provides a hammer separating device capable of smoothly dropping a hammer.

That is, according to the present invention, in the center of each of the scissor-shaped movable legs that are opened and closed by a hydraulic cylinder driven by air pressure for an air cylinder, an L-shaped open arm is formed of a vertical arm and a horizontal arm and opens downward toward each other. A hammer holding metal fitting having a corner portion of a support rotatably attached, an outer end engaging a lower end of a vertical arm of the L-shaped support, and a taper surface provided on an inner end is provided so that the taper surfaces face each other. It has an air cylinder that is rotatably attached to the lower part of both movable legs so as to form a V-shaped portion, and has weights that strike the lateral arms above the both lateral arms of the L-shaped support. After holding the round bar suspension hook fixed to the hammer in the approximately V-shaped portion and lifting the hammer to a predetermined height, the air cylinder is driven to move the lateral arm of the L-shaped support bracket with the weight. Hit At this time, the lower end of the vertical arm is disengaged from the engagement with the hammer holding metal fitting so that the hammer is dropped by its own weight.

[0005]

[Action]

 As described above, since the hammer is dropped by hitting the L-shaped support fitting with the air cylinder, it is possible to release the holding of the hammer in an extremely short time as compared with the conventional dropping mechanism using a hydraulic cylinder or the like. Therefore, the hammer can be dropped with certainty and stability. Further, the contact portion between the hammer and the separating device has a structure in which the hammer hanging hook formed of a round bar having a circular cross section is formed in the substantially V-shaped portion formed by the tapered surfaces of the hammer holding tools as described above. Therefore, it is possible to obtain a smooth drop motion when the hammer is dropped. Further, because of such a structure, there is an advantage that the wear between the hanging hook of the hammer and the substantially V-shaped portion becomes extremely small.

Further, in the disconnecting device of the present invention, the hydraulic cylinder is used only for opening and closing both movable legs of the scissors. Since a large force can be obtained with the hydraulic cylinder, the hammer support metal fittings at the ends of the two movable legs catch the hook of the hammer, and the hook is supported by the above-mentioned approximately V-shaped portion to lift the hammer when the hammer is lifted. This is because it is possible to prevent the situation where both movable legs are opened due to the weight.

[0007]

【Example】

 An embodiment of the present invention will be described below. As shown in Fig. 1 and Fig. 2, inside the fixed frame (2) for the separating device, which has the mounting hole (1) for the lifting metal for lifting with a crane etc. at the upper end, two lower parts are opened and closed like scissors. The upper ends of the movable legs (3) and (3) are rotatably attached.

Further, a supporting rotary shaft (7) is provided at a corner portion of an L-shaped support tool (6) having a vertical arm (4) and a lateral arm (5) at the center of the movable legs (3) (3). The L-shaped support tool (6) was made rotatable around its corners. The weight (9) attached to the tip of the air cylinder (8) installed at the center of the fixed frame (2) is attached to the upper end surface of the lateral arm (5) of the L-shaped support (6). It is configured to abut. Further, the lower end of the vertical arm (4) is engaged with the hammer holding metal fitting (10), and the coil spring (11) that pulls the lateral arm (5) upward when the air cylinder (8) is not operating. The above-mentioned engaged state is maintained by.

The hammer holding metal fitting (10) is rotatably attached to both movable legs (3) and (3), and the inner upper surfaces of both are formed into a tapered surface, and the movable leg (3) as shown in FIG. ) (3) is closed, the two hammer holding metal fittings (10) (10) have tapered surfaces forming substantially V-shaped portions (12). An arcuate 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 metal fitting (10). A concave surface (10 ') is provided.

Although not shown in FIG. 1, two hydraulic pressures are provided between the support rotary shafts (7) and (7) of the L-shaped support tool (6) attached to the movable legs (3) and (3). By attaching the cylinders (13) (13), both movable legs (3) (3) can be opened and closed. This hydraulic cylinder further increases this pressure by using the air pressure obtained by the air compressor that drives the above 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 as a normal hydraulic pump, a normal hydraulic pump or the like is unnecessary. Therefore, according to such a hydraulic cylinder, it becomes possible to keep the movable legs (3) and (3) closed at a high pressure.

Accordingly, 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 metal fittings (10) (10), the hammer (14 ), A force acts on the movable legs (3) (3) to open it, but this can be blocked by the pressure of the hydraulic cylinders (13) (13). It is possible to lift the hammer (14) to a high place in the state shown in Fig. 1 and Fig. 2.

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, open the movable legs (3) and (3) and straddle the hook (15), and then re-actuate the hydraulic cylinders (13) and (13) to move the movable legs (3). ) By closing (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. 2, 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 above separating device will be described. As shown in Fig. 1, firmly close both movable legs (3) and (3) with a hydraulic cylinder, and hold the hammer hook (15) with the approximately V-shaped portion (12) of both hammer holding brackets (10) and (10). Then, lift the hammer (14) upward. When the height reaches a predetermined level, the hydraulic cylinder still drives the air cylinder (8) with the movable legs (3) (3) still closed, and the weight (9) at its tip supports both L-shaped supports. The upper ends of the lateral arms (5) (5) of the tools (6) (6) are hit. This striking force causes the L-shaped support tool (6) (6) to rotate around the support rotation axis (7) (7) as shown in FIG. 4, and thus the vertical arm (4) has a convex surface (6 ') at the lower end. Since the engagement between the hammer and the concave surface (10 ') of the hammer holding metal fitting (10) is disengaged, the hook (15) of the hammer (14) falls by its own weight while rotating the hammer holding metal fitting (10). As described above, when the hammer is dropped, the hook of the hammer is separated by the instantaneous operation of the air cylinder, so that the wear due to the contact between the hook and the substantially V-shaped portion is extremely reduced.

[0014]

[Effect of the device]

 As described above, according to the present invention, since the hammer can be instantly separated by using the air cylinder, the separation resistance is very small as compared with the conventional hydraulic separation, so that the hammer hook and the separation device are separated from each other. It has the effect of significantly reducing the wear of the contact part, and since the hydraulic pressure for holding the hammer uses the air pressure obtained by the air compressor for the above air cylinder, a large-scale device such as a hydraulic pump is unnecessary. effective.

[Brief description of 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 a separating device according to an embodiment of the present invention.

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

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

[Explanation of symbols]

 1 Mounting hole 2 Fixed frame 3 Movable leg 4 Vertical arm 5 Horizontal arm 6 L-shaped support 6'Convex surface 7 Supporting rotary shaft 8 Air cylinder 9 Weight 10 Hammer holding metal fitting 10 'Concave surface 11 Coil spring 12 V-shaped portion 13 Hydraulic cylinder 14 hammer 15 hook

Claims (1)

[Scope of utility model registration request] 1. A corner of an L-shaped support member, which is composed of a vertical arm and a lateral arm and is opened inward and downward from each other, at the center of each of the scissor-shaped movable legs that are opened and closed by a hydraulic cylinder driven by air pressure for an air cylinder. Part is rotatably mounted, the outer end is engaged with the lower end of the vertical arm of the L-shaped support tool, and the hammer holding metal fitting having the tapered surface at the inner end is provided with substantially tapered V-shaped parts. An air cylinder which is rotatably attached to the lower parts of both movable legs so as to form the above, and further has a weight which strikes these lateral arms above both lateral arms of the L-shaped support. After holding the round bar suspension hook fixed to the hammer in the substantially V-shaped portion and hoisting the hammer to a predetermined height, the vertical arm is driven when the air cylinder is driven to strike the lateral arm of the L-shaped support bracket with the weight. The bottom end is han A hammer separating device, characterized in that the hammer is dropped by its own weight by being disengaged from the mer holding metal fitting.