JPS6219667Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small and simple crane that can be easily disassembled and assembled, and can be manually disassembled and transported to any location, assembled, and used.

Various types of hoisting machines are used to lift and lower relatively light objects at construction sites and other workplaces, but for example, large-scale hoisting machines are used to lift and lower light objects on temporary scaffolding or at high places. Cranes and the like are inconvenient because their operating costs are high and their handling is difficult. Therefore, there is a practical need for a crane that can be easily handled and easily removed after use.

In particular, when installing a crane at a high place for small-scale lifting or lowering operations or processing relatively lightweight equipment, it is possible to dismantle and remove the crane after use without using any other equipment. In other words, it is most desirable to have something that can be transported manually.

The present invention was developed in view of the current situation, and it is easy to disassemble and reassemble, each disassembled part is of a size and weight that can be carried by hand, and it can be assembled using ordinary tools. The purpose of the present invention is to propose a small and simple crane that has a simple structure and is easy to disassemble and assemble.

That is, the present invention has a mast part support frame which is assembled into a frame that can be divided into at least two parts, and a pair of side fan-shaped plates are connected at appropriate intervals at the upright ends on the intermediate part of one of the divided frames. The mast is erected and supported on the base at a predetermined angle by a base having a base end pivoted to the lower part of the mast base support frame, and a plurality of fixing holes drilled along the arc of the support frame. a mast supporting piece, the mast having a base rotatably supported by the mast supporting piece and having a pulley bracket removably attached to the top at an appropriate height;
A jib whose base end is pivotally attached to the top mounting end of the mast and is extendable and retractable, and which has a pulley at the tip and is connected and supported to the pulley bracket by a retaining rope, and a jib whose tip is connected to the tip of the jib and rotates around each of the pulleys. It consists of a suspension rope that is operated by a winch attached to the mast base to raise and lower the suspension pulley, and the upper part of the mast support piece is provided with numerous notches around the entire circumference, and the end of the lever-operated positioning rod attached to the mast is The mast is pivotably fixed by being engaged with or disengaged from one of the notches, and the connecting portions of the respective portions are connected in a manner that can be disassembled.

Hereinafter, one embodiment of the crane of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 6, the base 1 is formed by framing a shaped steel into a substantially square shape in plan view, and is assembled into two parts at the center. A mast base support frame 2 is erected on one side. This mast base support frame 2 has two fan-shaped plates when viewed from the side arranged at a required interval, and their upright ends are connected to each other by plates to form an integral shape. A plurality of fixing holes 2'' are drilled in both plates on an arc line with a required radius centered at It is designed so that

The mast 4 is constructed by integrally attaching a shaft 4' to the lower end of a rectangular steel pipe (which may be a regular steel pipe) of a required length, and attaching it to the mast base on the base 1. The mast support piece 5 is connected to the support frame 2 at its base end with a pin 6 and is rotatably mounted by a bearing inside the mast support piece 5 . This mast support piece 5 is the second
As shown in Figures 2 and 3, a box 6 is pivotally attached to a pin 5 through a pin hole 5' which is inserted between both side plates of the mast base support frame 2 and matches the pin hole 2' formed in both plates. A circular flange 5'' is fixed to the upper part of the box body, and a plurality of positioning notches 8 (8 in the embodiment) are equally divided on the outer periphery of the flange 5''. The fixing holes 2'' of the mast base support frame 1 are provided on both sides at the side ends.
A fixing piece 7 with a pin hole that matches each of the above is attached, and a bearing 9, which supports the shaft 4' of the mast 4 so that it can rotate freely without coming off, is attached inside.
9 is provided.

A small winch W is attached to the side of the main part of the mast 4 via a mounting plate 10. Support plates 11 are fixed symmetrically to the upper end of the mast 4 in parallel along both sides.
The base of the pulley support bracket 12 is detachably attached via bolts 13 through the support plate 11, and the base end of a telescopic jib 14 is connected to the tip of the support plate 11 via a pin 16. A pair of mounting plates 15 are fixed in parallel to the tip of the jib 14, to which a pulley 17 is attached. A stay rope 21 is stretched between a mounting bracket 19 and a support pin 20 via pulley support shafts 18' at each part between the tip of the jib 14 and the pulley support bracket 12, and a sling rope 23, one end of which is connected to the mounting plate 15 at the tip of the jib 14 via a pin 22, is connected to the jib 14 via a sling block 24.
The wire is wound around a pulley 17 at the tip of the mast 4, a pulley 18 attached to the bracket 12, and a winch W.
The support pieces 31, 35, 36 are detachably attached to the protruding pieces 25, 25 (or the protruding pieces may be fixed directly to the mast).
The locking rod 32 is movable in the vertical direction by the locking rod 32.
A coil spring 33 is provided between the lower surface of the upper support piece 31 and a flange 32' provided at the middle part of the locking rod 32 so that a pulling force is always applied.
The lower end of the locking rod 32 is engaged with the positioning notch 8 of the flange 5 ″ of the mast support piece 5 .
A connecting pin 34 is attached to the upper end so as to protrude sideways, and a swivel operation lever 37 is attached to a bracket 35 that protrudes from the side surface of the mast 4 above the position where the locking rod 32 is disposed, and the base part of the bracket 35 is supported by a pin 36 and has two connecting plate pieces 37' fixed in parallel.
A long hole 37" of an appropriate length is drilled in the connecting plate piece 37' of the connecting rod 32 along a line passing through the center of the pivot pin 36, and the end of the connecting pin 34 at the end of the locking rod is engaged with the end of the connecting pin 34. When the slewing control lever 37 is held upright upward, the lower end of the locking rod 32 fits into the positioning notch 8 to fix the rotation of the mast, and when the control lever 37 is rotated laterally, the locking rod 32 is pulled up and disengaged from the positioning notch 8 to allow the mast 4 to rotate freely.
4a (provided in two places)
By inserting 5', if it is made longer, the jib 14 will protrude upward as shown by the solid line in Figure 1, increasing the hanging allowance, and if it is made shorter, the depression angle will be smaller as shown by the two-dot chain line.

Each part of the crane is designed to have a weight that can be carried by hand when the bolts and pins from the connecting parts are removed and disassembled.

When using the crane of the present invention constructed as described above, in order to install it at a high place, it is disassembled into the smallest units that can be carried by hand, and these parts are transported to the required position and assembled. Depending on the condition of the installation location, the base 1 is fixed by placing sandbags or weight blocks (for example, iron blocks) on the base in a flat and stable place. In addition, using clamps etc.
For example, in the case of framework scaffolding, etc., it is fixed.

Then, when operating the jib, follow the procedure described above.
4 is determined, and then the winch W is activated to let out or wind up the hanging rope 23 to lift and lower the target article via the hanging pulley block 24. During the work, the jib 14 is rotated. To move, tilt the turning operation lever 37 sideways, and the locking rod 32
will be pulled up against the force of the coiled spring 33,
The lower end of the locking rod 32 comes off from the initial position of the positioning notch 8 provided on the flange 5'' of the mast support piece 5, and the mast 4 becomes free, so hold the swing operation lever 37 and rotate the mast 4. move it,
After displacing the tip of the jib 14 to the required position, the coil spring 3
Even with three forces, the lever 37 stands up, and at the same time, the locking rod 32 is attached to the notch 8 at or near the position.
is pressed down and engaged, the rotation of the mast 4 stops, and the lifting and lowering operation of the article is performed at that position. This can be done by grasping one turning operation lever 37 of the mast positioning mechanism 30, raising and lowering it, and applying rotational force in the folded state, so that the operation can be performed reliably.

In this way, it can be easily used for lifting and lowering relatively small and lightweight objects, and if the winch is equipped with a single-phase motor, general commercial power can be used, so it can be used at locations other than construction sites. Also available at When the desired work is completed and the machine is to be moved or removed, by untying the connecting pins and fastening bolts of each part, the whole machine can be disassembled into a state that can be transported by hand as described above, making cleanup easy. has.

In addition, during use, if the installation location is an inclined surface, the base 1 is tilted and the fixed piece 7 of the mast support piece 5 and the mast base support frame 2 are attached so that the mast 4 stands upright.
By fixing the mounting position with the fixing hole 2'' with a pin at the corresponding location, the rest is done in the same manner as described above, and the base is fixed and a fixing means to cope with the reaction force due to the hanging load is provided. It can be easily installed and used even on sloped surfaces.

As mentioned above, the crane of the present invention is designed so that each part can be disassembled and carried by hand, and after being assembled by connecting them with pins or bolts, the base can be set according to the installation location. The mast can be lifted and lowered in a stable state by mounting weights or securing it with clamps, and the mast can be easily swiveled and fixed in place using a single swivel control lever, and can be used on sloped surfaces. There is no problem when installing it, and the mast can be supported upright by shifting the fixed position of the mast support piece in the mast base support frame, and it has a great practical effect as a simple small crane.

[Brief explanation of the drawing]

Figure 1 is a front view of the crane of the present invention, Figure 2 is a plan view, Figure 3 is a detailed sectional view of the mast support, and Figure 4 is a detailed sectional view of the mast support.
The figure is a front view showing the details of the mast positioning mechanism, FIG. 5 is a view from the bottom of FIG. . 1...Base, 2...Mast base support frame, 2'
...Pin hole, 2''...Fixing hole, 4...Mast,
4'...Shaft, 5...Mast support piece, 5''...Flange, 6...Pin, 7...Fixing piece, 8...Positioning notch, 10...Winch mounting seat plate, 11...
...Support plate, 12...Pulley support bracket, 14...
... jib, 15 ... mounting plate, 17, 18 ... pulley, 21 ... retaining line, 23 ... sling, 24 ... pulley block, 30 ... mast positioning mechanism, 31,
31'... Support piece, 32... Locking rod, 32'...
Tsuba, 33...Coil spring, 35...Bracket, 36
...Pin, 37...Swivel control lever, W...Winch.

Claims (1)

[Scope of utility model registration request] It is a small crane that can be disassembled and reassembled, and the base has a frame that can be divided into at least two parts, and a mast base support frame consisting of a pair of side fan-shaped plates integrally connected at appropriate intervals on the intermediate position of one of the divided frame bodies. A mast which is erected and whose base end is pivoted to the lower part of the mast base support frame, and which supports the mast erected on the base at a predetermined angle through a plurality of fixing holes drilled along the arcuate portion of the support frame. A support piece is provided, a bracket with a pulley is detachably attached to the top of the mast, the base is rotatably supported by the mast support piece, and the jib is extendable and retractable, and the base end is pivotally attached to the top of the mast. At the same time, the suspension rope is connected and supported by a retaining cable to the bracket, and its tip is connected to the jib end, and the suspension cable is operated by a winch attached to the mast base. Multiple positioning notches are provided around the upper flange of the support piece, and locking rods are attached that can be engaged and detached via a swivel operation lever that can be raised and lowered, and each block is sized so that it can be transported by hand. A simple small crane characterized by a structure that allows it to be disassembled.