JPH022751Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cylinder lifting device for a diesel-type, hydraulic-type, etc. pile driver. The cylinder had to be positioned at the top of the tower, which required a lifting device for the cylinder. The present invention relates to an improvement of this type of lifting device.

Various types of lifting devices have been proposed in the past, but among them, locking protrusions are arranged side by side on the cylinder, and these locking protrusions are engaged with two hooks on the lifting device body. In practical use, there are structures in which the cylinder is lifted by lifting the cylinder, and the lifting of the cylinder is stopped by disengaging the engagement. This device has a complicated mechanism, requires time and effort to manufacture, and is quite expensive.Also, the connecting rod for interlocking the hooks is easily bent, which can cause problems in opening and closing the hooks, causing unexpected problems. There was a risk that it would cause a blunder.

In view of the above, it is an object of the present invention to provide an inexpensive cylinder lifting device for a pile driver, which has an extremely simple structure and whose lifting device operates positively.

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings.

Reference numeral 1 denotes a cylinder having a grip ring 2, into which a hammer and a piston 3 are inserted. As is well known, the cylinder 1 is configured to move up and down via a grip ring 2 along a guide rod 4 provided on the tower. In this embodiment, a bracket 5 is connected to the upper grip ring 2 of the cylinder 1.
This bracket 5 has wedge-shaped locking protrusions 6, 6' arranged in parallel,
A regulating plate 7,
7' is fixed. Reference numeral 8 denotes a lifting tool, and a preferred example of its configuration includes a gripping ring 9 held by a guide rod 4 on the back side of the lifting tool main body 10, and a lifting hook or the like pivoted to a mounting plate 11 fixed to the front surface of the gripping ring 9. Device 1
2, 12', link mechanisms 13, 13' for opening and closing the lifting devices 12, 12', and a pulley 14 provided above the lifting device main body 10. The lifting devices 12, 12' have substantially V-shaped claws 12a, 12'a that match the wedge shapes of the locking protrusions 6, 6'.

Next, to explain the usage state of the present invention, when the cylinder 1 is at the lower limit, the wire 15 for suspending the lifting tool 8 is relaxed, and the lifting tool 8 is lowered between the cylinder 1 and the guide rod 4. Insert into. The wire 1 is then connected to the link mechanisms 13, 13'.
6 is tensioned, the link mechanisms 13, 13' are expanded to a substantially horizontal state, and the lifting devices 12, 1
2' is in the open state as shown in FIG. 2B. If the wire 16 is relaxed here, the lifting devices 12, 12' will be
It restores its own weight and enters the closed state as shown in FIG. In addition, the claw portions 12a of the lifting devices 12, 12' of the lifting tool 8,
If 12'a is formed into a V-shape, the engagement relationship can be maintained without manipulating the wire 16 as described above. That is, the lifting device 1 is lowered by lowering the lifting tool 8.
2, 12' collide with the locking protrusions 6, 6', the claws 12a, 12'a will automatically expand due to their structure.
It passes over the locking protrusions 6, 6'. Then, when it passes through the locking protrusions 6, 6', it automatically shrinks (restores), so that the above-mentioned engagement relationship is formed, which is convenient. If the wire 15 is wound up one after another in this state, the cylinder 1 will be raised one after another via the lifting tool 8. In this case, even if the cylinder 1 swings slightly, it will be regulated by the regulating plates 7, 7', and the engagement relationship will be maintained without the locking protrusions 6, 6' coming off from the lifting devices 12, 12'. It is. When the cylinder 1 reaches a predetermined position, by tensioning the wire 16, the lifting device 1
2 and 12' are opened, and the engagement relationship is released. As a result, the cylinder 1 does not rise any further and is held in its suspended position on a pile or the like.

As detailed above, the present invention has a structure in which the lifting device, which opens and closes using a link mechanism, can be freely engaged and detached from the locking protrusion attached to the cylinder, so that the engagement relationship is very smooth and the structure is simple. It is extremely simple and can be provided at low cost. In addition, since the lifting device is opened and closed by a link mechanism, the operation of the lifting device is effortless, the work progresses smoothly, and there is little risk of failure, and it is durable and will not break down under normal external forces. Excellent. Furthermore, the overall structure is extremely simplified compared to the conventional one, can be provided inexpensively and economically, and has practical effects such as being very rational.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the lifting tool, FIG. 2 A and B are a front view showing the operating state of the lifting tool, and FIG. FIG. 4 is a front view of the main parts. 1... Cylinder, 2... Gripping ring, 4... Guide rod, 5... Bracket, 6, 6'... Locking protrusion,
7, 7'... Regulation plate, 8... Lifting tool, 9... Gripping ring, 10... Lifting tool body, 12, 12'... Lifting device, 13, 13'... Link mechanism, 14... …
pulley.

Claims (1)

[Scope of claim for utility model registration] () A hammer that slides up and down inside a cylinder,
In a pile driver having an internal piston, a locking protrusion is provided on the cylinder via a bracket, and a pair of lifting devices that are opened and closed by a link mechanism that can be freely engaged and detached from the locking protrusion are provided on one side. A cylinder lifting device for a pile driver, comprising a gripping ring on the other surface of the lifting tool body and a pulley above the lifting tool main body. () A cylinder lifting device for a pile driver according to Claim 1 of the Utility Model Registration Claim, which comprises a locking protrusion provided with a regulating plate.