KR200410982Y1 - Heavy goods lifter - Google Patents

Abstract

The present invention discloses a heavy weight lifter for lifting and lowering heavy weight during installation and maintenance work of underground buried facilities. The present invention provides a top plate, at least three support legs arranged at the same angular intervals at the bottom edges of the top plate and hinged to each other, a ratchet winch suspended at the center of the bottom of the top plate and having a towing chain and an operation chain. It is equipped with a pantograph-type clamp mounted on the lower end of the traction chain and lifting and lifting heavy objects by its own weight. The clamp consists of one vertical link connected to the towing chain, a pair of inclined links each of which is hinged at the lower end of the vertical link, and an L-shape, the upper end of which is hinged to each inclined link, and the bend is hinged to each other. It is composed of a pair of gripping links, the lower end of the gripping link is held by the weight of the weight at the time of holding the heavy weight to hold the heavy material.

The present invention enables a simple and safe lifting and unloading of heavy attachments such as valves when installing or repairing underground laying facilities such as buried pipes.

Clamp, Pantograph, Heavy Load, Buried Pipe, Underground Facility

Description

Heavy goods lifter

1 is a front view showing a heavy lifter according to the present invention,

Figure 2 is an excerpt top view of the subject innovation lifter,

Figure 3 is a partial cut side view showing the configuration of the support leg of the subject innovation lifter,

4 is a cross-sectional view taken along the line IV-IV of FIG. 3;

Figure 5 is an extract of the main portion showing the operating state of the heavy lifting device of the present invention.

* Explanation of symbols for main parts of the drawings

10: Top 11: hinge bracket

12: support ring 20: support bridge

21: main bridge 22: secondary bridge

21a, 22a: fixing hole 23: fixing bolt

30: Ratchet Winch 31: Towing Chain

32: operation chain 40: clamp

41: vertical link 42: inclined link

43: Gripping link 44: Base jaw

44a: soft pad W: heavy product

F: flange

The present invention relates to a heavy weight lifter, and more particularly, to a heavy weight lifter that can be lifted and lowered relatively easily by a manpower when heavy installations and installation work of various underground facilities such as buried pipes.

In general, various facilities such as water and sewage pipes and city gas supply pipes are buried underground for safety. In particular, in the case of gas pipes, it is necessary to block the supply or adjust the flow rate as necessary. Accordingly, at a predetermined position of the buried pipe, for example, a branch point of the pipeline, an accessory facility such as a valve for opening and closing the gas flowing therein is provided, and a manhole that a worker can enter and exit for maintenance of the facility at the location thereof. manholes are installed.

On the other hand, when an abnormality occurs in the pipeline and replaces an accessory such as a valve or branches a new pipeline from an existing pipeline, it is very difficult to lift or lower by manpower because the auxiliary facilities such as the valve and the manhole are bulky and heavy.

Therefore, for the repair work of such buried piping accessories, there is no choice but to mobilize heavy equipment such as fork lanes.In this case, there is no other means for stably holding valves and manholes and connecting them to the heavy equipment. Lifting and unloading with heavy equipment was mainly used.

However, in this case, since several workers were required to tie and release the facilities with wires in cooperation, the work was very complicated and difficult, and the risk of safety accidents was very high.

In addition, the binding by the wire is likely to cause an unsafe binding, the facility is likely to fall out of the wire during transportation, and this causes frequent damage to the facility or lead to safety accidents.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a heavy lifting device that can easily and safely lift and lower the heavy attachments by manpower during installation and maintenance work of various underground facilities such as gas piping There is this.

In order to achieve the above object, the heavy lifting device according to the present invention is a heavy lifting device for lifting or lowering heavy accessory facilities during installation and maintenance work of underground embedding facilities. At least three support legs arranged at equal angular intervals on a lower edge of the upper plate and hinged to each other; A ratchet winch suspended in the center of the lower surface of the upper plate and having a towing chain and an operating chain; It is mounted on the lower end of the traction chain of the ratchet winch and lifted, and clamped in the pantagraph (pantagraph) type to hold the heavy material by its own weight.

According to one preferred feature of the present invention, the clamp is composed of one vertical link connected to the traction chain, a pair of inclined links hinged at the upper end to the lower end of the vertical link, and the L-shaped top It is hinged to the inclined link and the bent portion is hinged to each other is composed of a pair of gripping links, when holding the heavy weight by holding the lower end of the gripping link by the weight of the weight respectively.

Accordingly, the present invention can easily and safely lift and lower heavy attachments such as valves when installing or repairing underground laying facilities such as buried pipes, thereby greatly improving safety and convenience of underground laying and maintenance work. Will be exercised.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

1 to 4, the heavy lifting device according to the present invention includes a top plate 10, three support legs 20 installed at the bottom edge of the top plate 10, and suspended at the center of the bottom surface of the top plate 10. It consists of a ratchet winch 30 and a clamp 40 mounted to the ratchet winch 30 to hold an accessory facility of an underground embedding facility such as a valve.

The upper plate 10 is formed in a circular shape, for example, and has three fork-type hinge brackets 11 for mounting the support legs 20 at the lower edge thereof at equal angular intervals. And the support ring 12 for suspending the ratchet winch 30 in the center of the lower surface is installed by screwing.

The support leg 20 is configured to properly adjust the angle of the upper end is connected to the hinge pin 24 to the hinge bracket 11 of the upper plate 10 to be appropriately. This is to stably mount the lifter according to the conditions of the work site, each support leg 20 can be pivoted individually.

The support leg 20 may be configured as a single body, but in this case, the length is considerably longer, which may be difficult to transport or store. Preferably, the support leg 20 has a stretchable structure as shown.

That is, the main leg 21 having the fixing hole 21a at the lower end and pivotally connected to the fork bracket 11 of the upper plate 10 and the plurality of fixing holes 22a at regular intervals. ) Consists of an auxiliary leg 22 slidably assembled in the main body 21 and a fixing bolt 23 for integrally fastening both of them through the fixing holes 21a and 22a of the main leg 21 and the auxiliary leg 22. According to the condition of the work site, the auxiliary leg 22 is configured to be appropriately withdrawn from the main leg 21.

And the lower end of the auxiliary leg 22 is preferably made of a conical shape of the bottom end pointed so that it can be stably placed on the ground.

The ratchet winch 30 has a ratchet device (not shown) therein, and has a towing chain 31 for suspending heavy materials and an operation chain 32 for elevating the towing chain 31.

The ratchet winch 30 may be integrally fixed to the lower surface of the upper plate 10, but in this case there is a difficulty in handling the lifter, such as transport and storage, the hook (hook: 33) on the top as shown And is detachably mounted to the support ring 12 of the upper plate 10.

The clamp 40 is configured in a pantograph type in which a plurality of links are hinged in an X-shape to hold the weight W by the weight of the weight W.

To this end, the clamp 40 is, for example, one vertical link 41, a pair of inclined links 42, the upper end of which is connected to the hinge 45 at the bottom of the vertical link 41 at the same time, approximately L-shaped The upper end is composed of a pair of gripping links 43 connected to each of the two inclined links 42 by a hinge 45, each bending portion is connected to each other by a hinge 45.

Accordingly, when the clamp 40 suspends the heavy weight W, the lower ends (free ends) of the two gripping links 43 are each opened outward in opposite directions by the weight of the heavy weight W. W) is held.

And the lower end of the gripping link 43, the support jaw 44 is provided so as to be able to lift and lift the weight (W) stably. The contact surface of the base 44 is preferably attached with a soft pad 44a such as rubber, for example, to prevent slippage and increase adhesion.

The clamp 40 is provided with a connecting ring 46 for easy connection with the traction chain 31 on the top of the vertical link (41).

Next, a process of lifting a heavy object such as a valve by using the heavy object lifter according to the present invention having such a structural feature will be described in parallel with FIG. 5.

For example, when replacing an old valve or the like during the maintenance work of underground installation facilities such as gas pipes, the lifter is safely mounted by using the support legs 20 directly on the upper part of the manhole H. At this time, the support leg 20 is appropriately opened according to the conditions of the work site, and the auxiliary leg 22 is appropriately withdrawn from the main leg 21 to adjust the state of the lifter to suit the work.

Next, the ratchet winch 30 is hooked to the support ring 12 provided at the center of the lower surface of the upper plate 10 by using the hook 33, and then clamped to the lower end of the towing chain 31 of the ratchet winch 30. Fasten 40 using the connecting ring (46).

In this state, the operation chain 32 of the ratchet winch 30 is pulled in the downward direction to lower the traction chain 31 into the manhole H, and then the lower end of the gripping link 43 of the clamp 40. Hook the provided support jaw 44 to the inner peripheral flange (F) of the weight (W) dismantled from the plumbing facility to be lifted. At this time, the traction chain 31 is a state in which the tension is not applied to the loose state, the clamp 40 can be stretched.

While holding the gripping link 43 of the clamp 40 against the heavy weight W, the operation chain 32 of the ratchet winch 30 is pulled in the lifting direction (the direction opposite to the lowering). Then, the traction chain 31 is pulled upwards, and as a result, the grip links 43 of the clamp 40 are opened to the outside by the linking action, as shown by the virtual line in FIG. The flange F is strongly gripped.

Subsequently, when the traction chain 31 is further pulled and the weight W is lifted from the ground while being held by the clamp 40, a strong tensile force acts on the traction chain 31 by the weight of the weight W. The two gripping links 43 are more likely to open, and thus, the two gripping links 43 compress the heavy material W more strongly to achieve a very firm gripping state.

Next, when the weight W is sufficiently lifted out of the manhole H, the weight W is pulled downward in the downward direction while pulling the weight W onto the ground near the manhole H. After seating, the clamp 40 is dismantled.

On the other hand, when the heavy object W is sent to the ground in the manhole H, the work proceeds in the reverse order of the above-mentioned lifting operation.

As described above, according to the heavy lifting device according to the present invention, heavy installations such as valves can be easily and safely lifted and lowered by manpower without heavy equipment when installing or repairing underground buried facilities such as buried pipes.

In addition, the heavy material can be gripped very firmly, so it can be transported stably because there is little fear of dropping out during transportation, and its structure is simple and its structural stability is excellent. do.

Therefore, the present invention has an excellent effect of greatly improving safety and convenience of installation and maintenance work of underground embedding facilities.

Claims (4)

As a heavy lifter for lifting or lowering heavy attachments during installation and repair work of underground buried facilities, Tops; At least three support legs arranged at equal angular intervals on the bottom edge of the upper plate and hinged to each other; A ratchet winch suspended in the center of a lower surface of the upper plate and having a towing chain and an operating chain; And And a pantograph-type clamp mounted on the lower end of the towing chain of the ratchet winch and lifting and holding a heavy object by its own weight. 2. The clamp of claim 1, wherein the clamp comprises one vertical link connected to the towing chain, a pair of inclined links each of which is hinged at an upper end of the vertical link, and an L-shaped upper end to each inclined link. A heavy weight lifter, comprising: a pair of gripping links hinged and bent parts hinged to each other so that the lower end is opened outward when the heavy weight is held. 3. The support leg according to claim 1 or 2, wherein the support leg is hinged to the upper plate and has a fixing hole at the lower end thereof, and a main leg on the pipe having a plurality of fixing holes at a predetermined interval so as to be stretchable in the main leg. A heavy lifting lifter, characterized in that consisting of a fixing bolt for fastening both through the fixing leg of the auxiliary leg and the main leg and the auxiliary leg to be coupled. The heavy lifting device according to claim 3, wherein a supporting jaw is provided at the bottom of the gripping link to support the heavy material by hanging, and a soft pad for preventing slipping is attached to the supporting jaw.

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