JPS6117067Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pulling device for pulling out piles driven into the ground, such as agricultural steel pipe piles and steel pipe columns.

Traditionally, in agricultural work, when pulling out steel pipe piles and supports used for growing vine crops, or the supports of plastic greenhouses, the geology of the cultivated land and the long period of use are important when pulling out stakes and supports driven into the ground. If the piles are rusted due to a long period of time, a large amount of pulling force is required.

For this reason, there is a pulling device which applies the principle of a lever, and this known device is described in Japanese Utility Model Application Publication No. 19307/1983. That is, in this known device, a swingable operation lever is provided at the upper end of the column, and the lower part is attached to the front end of an operating lever whose rear end is swingably mounted on a supporting leg at the lower rear side of the column. The upper end of the connected rod is rotatably connected to the tip of the operating lever, and a horizontal U-shaped stake holding means is swingably attached to the lower end of the connected rod via a U-shaped fitting. be.

This known device tilts the U-shaped pile holding means so that the locking claw on the upper side bites into the rear of the pile and the locking claw on the lower side bites into the front of the pile, and then the rear end of the operating lever is pushed down by hand and the pile holding means is pulled up with the connecting rod at the tip to pull out the pile.

In this known device, the stake is made of wood and is made of a material that can be sufficiently bitten by the locking claw, and the inclination angle of the stake holding means is such that the diameter of the stake is such that the locking claw can easily bite into it. The following conditions are necessary.

In addition, since bending loads are applied to the piles, if the piles are weak, there is a risk of breakage, and if the piles are made of iron pipes or are too thick or thin, the pile There is a problem that the pile cannot be held securely.

In addition, there are devices that use hydraulic cylinders to grip and pull out piles, such as the device described in Japanese Utility Model Application Publication No. 48-33111, but such devices have the problem that not everyone can easily use them. It was hot.

The purpose of this invention is to solve the problems of the conventional extraction device as described above.

The details of this invention will be explained below based on an embodiment shown in the attached drawings.

In the figure, reference numeral 1 denotes a support made of steel pipe or the like, the lower end of which is closed with a bottom plate 2.

3 is a sliding member made of steel angle material, etc., and a guide tube 4 fixed at the top and bottom of the rear side is a sliding member 1
It is slidably fitted on the outside of the

A forward-facing support frame 5 is fixed to the front lower part of the sliding member 3, and a receiving member 6 is fixed to one side of the front end of the support frame 5. In the case of the embodiment, the above-mentioned receiving member 6 has a chevron shape as shown in FIG. It is removably fixed by means of.

However, in addition to the illustrated example, the receiving member 6 may be of various types, such as one with a flat side on the support 1 side, one with a semicircular recess, one with a rectangular recess, one with multiple chevrons arranged in parallel, and one with a sawtooth shape. Any shape can be used.

A is a toggle mechanism provided in the middle of the support frame 5 on one side. This mechanism consists of a toggle link 9 whose lower end is slidably attached to one side of the support frame 5 by a shaft 8, an advancing/retracting frame 11 rotatably connected to the upper front end of this toggle link 9 by a shaft 10, It consists of a continuous rod 13 connected to the rear end of the link 9 by a shaft 12.

The middle part of the operating lever 14 is swingably attached to the upper end of the column 1 through a shaft 15, and its front end is rotatably connected to the upper end of the connecting rod 13 through a shaft 16.

The above-mentioned shaft 15 is detachable using bolts and nuts, the operating lever 14 is provided with a plurality of holes 17 through which the shaft 15 passes, and the shaft 15 is passed through any hole 17 to be attached to the upper end of the support 1. This allows the lever ratio to be changed freely.

Further, a pressure bonding member 18 is provided at the front end of the advance/retreat frame 11.
are attached together by means such as welding.

In the illustrated example, the crimp member 18 has a mountain shape facing the receiving member 6 as shown in FIG. 3, but the crimp member 18 can also have any shape like the receiving member 6. Furthermore, thick rubber plates may be attached to opposing surfaces of the members 6 and 18 to prevent damage to the stakes and the like.

The extraction device of this invention has the above-mentioned structure, and the pile 2 is driven into the ground 19 as shown by the chain line in FIG.
When pulling out 0, first stand prop 1 on the ground,
As shown in FIG. 1, when the inside of the receiving member 6 is placed against the front side of the stake 20 and the rear end of the operating lever 14, which is oriented diagonally upward as shown in FIG. The connecting rod 13 rises, and the toggle link 9 connected to the lower end rotates forward about the shaft 8, and the advancing/retracting frame 11 connected to this link 9 is advanced and the crimp member 18 on the front side is attached to the pile 20. Crimp it on the back side.

In this way, the pile 20 is
With the lever 14 clamped as shown in Figure 2,
When you push up the rear part of the
3 goes up like the chain line in Figure 2, and the toggle link 9
The support frame 5 is pulled up together with the sliding member 3 through the support frame 5 .

Therefore, the pile 20 clamped by the receiving member 6 and the crimping member 18 is also pulled out.

This device performs the above-mentioned action, and the pile 20, etc. can be continuously clamped and pulled out by operating the lever 14. In particular, in the case of this device, a sliding shaft attached to the support column 1 so as to be able to rise and fall is used. Part 3
The toggle link 9 is attached to the support frame 5 of the support frame 5, the crimping member 18 is attached to this, and the toggle link 9 is rotated in the vertical direction by a lever 14 attached to the upper end of the column 1 by connecting the lower end of the connecting rod 13. Since the crimping member 18 is advanced and retracted by the holder 6 and the crimping member 18 at the front end of the support frame 5 to clamp the pile 20, etc., the operation of the operating lever 14 required to open and close the members 6 and 18 is necessary. The corners can be made smaller,
Since the operating angle of the lever 14 for subsequent pulling out can be made large, a large pulling force can be obtained with a small force, and since the direction of the pulling force is the same as the axis of the pile 20, etc., there is no loss of force or damage to the pile. There is no risk of damage, and the shaft 15 serves as a fulcrum for the operating lever 14.
Depending on the position of the lever, a sufficient pulling force can be obtained by appropriately selecting the lever ratio, and since the toggle mechanism A is used, there are very few connecting parts by the shaft, and the structure is simple. Therefore, there is less risk of failure, and since it is small and lightweight, it is easy to transport. Furthermore, it has the advantage that it can be clamped regardless of the diameter of the stake, and that it can be reliably clamped and pulled out regardless of the material of the stake.

[Brief explanation of the drawing]

1 and 2 are side views of the drawing device of this invention in various states, and FIG. 3 is an enlarged plan view of the drawing device of this invention. 1... Support column, 3... Sliding member, 5... Support frame,
6... Receiving member, 14... Operating lever, 18... Crimping member, 20... Pile, A... Toggle mechanism.

Claims (1)

[Scope of utility model registration request] A connecting rod is provided at the front end of the operating lever that is swingably attached to the upper end of the column, and the upper end of the pile is held by the pile holding means at the lower end of this connecting rod, and the pile can be pulled out by manual operation of the operating lever. In the device, a support frame is fixed to the front part of a sliding member that is attached to a support column so as to be able to rise and fall freely, and a receiving member for receiving a stake to be pulled out is fixed to the front end of this supporting frame, and this receiving member and the sliding member are fixed to the front end of the supporting frame. The lower front end of the toggle link is rotatably attached to the support frame between the movable members, and the upper front end of the toggle link is moved forward and backward toward the stake received by the receiving member as the toggle link swings. The pile holding means is configured by rotatably attaching a crimping member, the lower end of the connecting rod is rotatably connected to the rear end of the toggle link, and the operating lever is provided with a plurality of holes at appropriate intervals. A device for pulling out stakes, etc., which is arranged in the front and back, and has an operating lever attached to the upper end of the column by a shaft inserted through any of the holes, so that the lever ratio of the operating member can be freely changed.