JPH1160141A - Aligning hoisting accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensive provide an aligning hoisting accessory which has good operability, safety, and good horizontal accuracy, by placing a first hook at one end on the winding-up side of a load chain and a second hook at the other end on the winding-down side. SOLUTION: A first hook 40 is placed at one end on the winding-up side 41a of a load chain 41 and a second hook 42 at the other end on the winding- down side 41b. Assuming that center-of-gravity Z side of deflection hoisted load W is previously known, the first hook 40 is hung on the heavier side 37, and the second hook 42 is connected with the lighter side 38. Here, load on the first hook 40 (winding-up side) is set equal to or larger than load on the second hook 42 (winding-down side). When the heavier side 37 is at lower position, by exchanging a switching grab to the winding-up side and then rocking and operating an operating lever, a load chain 41 moves and the hoisted load W can be adjusted. On the contrary, when the lighter side 38 is at lower position, by rocking and operating the operating lever, the load chain 41 changes to set the hoisted load W horizontal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering suspender used for suspending an eccentric suspended load or a long suspended load while keeping it horizontally.

[0002]

2. Description of the Related Art At present, the following suspension tools are known for horizontal suspension (balance suspension) of an eccentric load. A: Reversing device (power type) B: Balance hanging device B1: Chain type (composed of chain, chain wheel, wheel fixing device, etc.) B2: Wire rope type (composed of wire rope and drum etc.) C: Balance hanging device Use multiple check blocks without using

[0003]

However, each of the conventional methods A, B and C has the following problems.

A method: There are a link chain type and a belt type. Since the main purpose is originally for reversing the suspended load, there is no centering mechanism (free mechanism). In addition, the electric type is large and expensive. In addition, the inclination correction (reversal) of the suspended load
This must be done after lifting.

[0005] B1 system: The structure is simple, and the centering system (free mechanism: free the chain wheel, pull the chain to change the left and right length, and change the left and right hanging angle) The chain wheel is fixed at the point where the center of gravity of the load is balanced. Position). Also, if the center of gravity of the suspended load moves (when one side gets on or touches a structure), a large load is applied to the fixing pin. Furthermore, the tilt of the suspended load cannot be corrected after lifting.

B2 system: The basic structure of the wire rope system is as follows:
This method uses the frictional resistance of the wire rope wrapped around the drum to prevent the movement of the hanging point. The method of use is to gradually change the length of the left and right ropes with the wire rope loosened (no load). To find the center of gravity of the suspended load and lift it when it is balanced. In this method, it is difficult to move an arbitrary hanging point because the wire rope is wound around. In addition, the wire rope is severely damaged and wears out quickly.

C method: A method in which a plurality of commercially available hoists (chain block, lever hoist, electric chain block, etc.) are used to balance the inclination of the suspended load and the center of gravity. It is not a centering suspender.
Also, it is not suitable for simple work and is large-scale.
Furthermore, it is not a centering type (with a free mechanism).

The present invention relates to each of the conventional systems (A, B1,
It is an object of the present invention to solve the problems of B2 and C) and to provide a centering suspension device which can be mass-produced at a low cost with a simple structure, has excellent workability, and has excellent durability and operability. .

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a structure in which a first hook is attached to one end of the load chain of the lever hoist on the hoist side, and a second hook is attached to the other end of the lower side of the load chain. did. Also, the load chain guide is omitted on the lower side of the load chain. In addition, a striated body for remotely operating the switching handle for switching from the idling state to the locked state is provided. The angle θ between the hoisting side and the lowering side of the load chain around the load sheave is 45 degrees.
It was configured to be able to open up to a predetermined maximum angle θmax in the range of ° to 75 °.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on the illustrated embodiments of the present invention.

In FIG. 1 to FIG. 4, the centering suspender is constructed by using the basic structure of the lever hoist almost as it is, and a second end is provided at the end of the lowering side 41 b of the load chain 41.
The point that a hook 42 is attached is different from the general lever hoist. That is, as shown in the front view of FIG. 1 and the rear view of FIG. 2, the conventional first hook (of the winding side 41a)
In addition to 40, a second hook 42 (on the lower side 41b) is provided.

In FIG. 2, reference numeral 43 denotes a load chain guide on the hoisting side 41a, but the load chain guide is omitted on the lowering side 41b, and the stay bolt 44 is attached to the load chain as shown in FIG. The lower plates 41b are arranged on the side plates (body) 5, 5 so that the lower side 41b can touch (swing) largely in the M direction.

Reference numeral 18 denotes a switching handle for switching from the idling state to the locked state, and has a striated body 45 for remotely controlling the grip 18 from the floor (ground) side. For example, a wire, a thin rod, a wire (rope), etc.
Preferably, in the figure, a small hole is formed in the handle 18 and the upper end of the striated body 45 is hooked (through) on the small hole. Since the load chain guide on the lowering side 41b is omitted as described above, the hoisting side 41a and the lowering side 41 of the load chain 41 (centering on the load sheave 3) are shown in FIG.
b may open up to a predetermined maximum angle θ max in the range of 45 ° to 75 °.

The other basic parts of the lever hoist can be commonly used. In other words, the basic structure of this lever hoist will be described below. In FIGS. 3 and 4, and FIGS. 1 and 2, reference numeral 1 denotes a pinion shaft 1 having a pinion 2 fixed to one end. The sheave 3 is rotatably fitted on the shaft 1, and the load sheave 3 is pivotally attached to side plates 5, 5 via load metals 4, 4. 34 is an upper hook.

Reference numeral 6 denotes a load gear fixed to the load sheave 3, which is always linked to the pinion 2 via a reduction gear group 7. Reference numeral 8 denotes a gear box, which surrounds the reduction gear group 7 and the like, and is fixed to one side plate 5. Reference numeral 9 denotes a ratchet cover, which is fixed to the other side plate 5.

Numeral 10 denotes a disk hub which is fixed to the shaft 1 and comprises a small cylindrical portion 10a. Reference numeral 11 denotes a disk nut screwed into the screw portion 12 of the shaft 1 so as to be able to advance and retreat.
A ratchet wheel 13 and brake linings 14, 14 are interposed between the disk hub 10 and the disk nut 11 so as to be able to press.

A rotatable interlocking ring 15 is externally fitted to the small cylindrical portion 10a of the disk hub 10, and serrations, splines, etc. are formed on the outer peripheral surface of the interlocking ring 15, and the inner surface of the through hole is correspondingly formed. Ratchet wheel 13 and brake lining 14, which have serrations and splines
14 is fitted so that the contact surface between the ratchet wheel 13 and the brake lining 14 does not rotate relatively. One brake lining 14 corresponds to the outer flange 10b, and the other brake lining 14 is a disc nut.
Corresponding to the 11 inner end faces, relative slip occurs only at the respective contact faces (two faces). Thereby, the braking torque is stabilized (the braking performance is stabilized). Further, as shown in FIG. 3, a braking claw 19 is provided on the side plate 5 and engages with the uneven teeth on the outer periphery of the ratchet wheel 13.

The above disk hub 10, disk nut 11,
The interlocking ring 15, the ratchet wheel 13, the brake linings 14, 14, the braking claw 19, and the like constitute a brake unit 16.

Reference numeral 30 denotes an operation lever mounted so as to be swingable around the axis L of the shaft 1.
A forward rotation claw and a reverse rotation claw that are disengaged from the switching gear portion 17 (not shown) are provided near the base of the operation lever 30, and are directly or indirectly operated by operating the switching handle 18. The claw piece can be switched between forward / reverse and neutral. Reference numeral 20 denotes an idling handle slidably fitted to the shaft 1 outside the disk nut 11. The idling handle 20 is connected to and integrated with the disc nut 11 with a fixing tool such as a bolt 33. The disc nut 11 and the idling handle 20 rotate integrally, or move integrally in the axial direction, or Stand still.

The shaft 1 has a threaded portion 12 into which a disk nut 11 is screwed so as to be able to advance and retreat, and a stepped portion 22 is formed with a small-diameter shaft portion 21 starting from the outer end. The stepped portion 22 serves as a spring contact of an inner end of a second spring 32 described later. A washer 29 and a nut 28 are fixed to the outer end 1a of the shaft 1 (ie, near the outer end of the small-diameter shaft 21).

An inner flange 26 is projected from the middle of the hole 24 of the idling handle 20, and the diameter of the inner flange 26 is set slightly larger than that of the small diameter shaft 21 of the shaft 1. Other inner diameters of the portion 24 are set relatively large. That is, in a state in which the shaft 1 is inserted into the hole 24 (assembled state), a cylindrical outer spring chamber 27 and an inner spring chamber 23 are formed as shown in the figure. The outer spring chamber 27 accommodates the first spring 31 having a coil shape, and the inner spring chamber 23.
Is stored in the coil-shaped second spring 32. Both springs 31, 32 are compression springs and are always in a compressed state.

More specifically, an outer end of the first spring 31 is engaged with the washer 29 protruding from the outer end 1a of the shaft, and an inner end of the first spring 31 is engaged with the inner flange 26. The portion 26 is constantly and elastically pressed inward (to the left in FIGS. 3 and 4). The inner end of the second spring 32 is locked to the stepped portion 22 of the shaft 1 and the outer end is locked to the inner flange portion 26 so that the inner flange portion 26 can be moved outward. 3, rightward in FIG.
Pressing constantly and elastically.

In other words, the first spring 31 and the second spring 32 are respectively composed of the disc nut 11 and the idling handle.
The unit 20 is resiliently urged in the approaching direction and the separating direction from the disk hub 10, respectively. FIG. 3 shows a braking state, and FIG. 4 shows an idling state with a gap G. here,
An example of selection of the resilience and the spring constant of the first and second springs 31, 32 will be described.

The two springs 31 and 32 are composed of exactly the same coil spring, and the first and second springs 3
If the compression amounts of 1,32 are set to be the same, the respective resilient biasing forces will be F ₁ = F ₂ . 4, a gap G is generated between the brake lining 14 and the disk nut 11, and the elastic biasing force F ₁ ′ of the first spring 31 is generated.
Is greater than the resilient biasing force F ₂ ′ of the second spring 32, and F ₁ ′> F ₂ ′. By doing so, the thrust force of (F ₁ ′ −F ₂ ′) is increased during idling by the disc nut.
Acting on the threaded portion between the shaft 11 and the shaft 1, the frictional resistance is increased, and the shaft 1 and the disk nut 11 are idled together, and the rotational moment of inertia (torque) of the disk nut 11 and the idle handle 20 is suddenly increased. 3 can be prevented from returning to the braking state shown in FIG.

Further, as another selection is At a braking state of FIG. 3, the second spring 32 elastically biasing force F _2, to be greater than the elastic biasing force F ₁ of the first spring 31 ( The spring constant is changed and / or the compression amount at the time of assembling is set differently), and then, in the idling state of FIG. 4, on the contrary, F ₂ ′ <F ₁ ′. Configuration is also desirable.
Also in this case, the disc nut 11 and the idling handle 20
(F ₁ ′ −F ₂ ′), the contact surface pressure between the thread of the threaded portion 12 of the shaft 1 and the thread of the disc nut 11 increases, and the frictional resistance causes (from the idling handle 20) The disc nut 11 and the idling handle 20 rotate integrally with the shaft 1 (even if the hands are released).

Next, in order to change from the idling state to the braking state,
What is necessary is just to hold the idling handle 20 by hand, rotate it a little, and screw it inward (to the left in FIGS. 3 and 4).

As described above, the centering suspender of the present invention has the first hook 40 and the second hook 42 at both ends of the load chain 41, and there is no load chain guide on the lowering side 41b. Predetermined maximum angle θmax in the range of 45 ° to 75 °
Up to this point, the load chain 41 is configured to be able to open greatly (in the form of an open leg), and a remote control striated body 45 is attached (coupled) to the switching handle 18. Although not shown, a lock means (fixing device) for stopping the swing of the operation lever 30 is provided. The upper hook 34 and the first hook 40
Are the same color, and the second hook 42 is a different color,
Make identification clear.

FIGS. 5 to 8 show an example of a method of using the aligning and suspending tool C according to the present invention. That is, in FIG. 5 to FIG. 8, the operation of horizontally suspending the eccentric suspended load (work) W in which the center of gravity Z is unevenly distributed by the centering suspender C of the present invention will be sequentially described. The hanging member C is suspended via the suspension chain hook 36a of the electric chain block 36 of the ceiling traveling (traversing) rail 35 (for example). Assuming that the side having the center of gravity Z is known in advance, the eccentric suspended load W
The hook 40 is hooked, and the second hook 42 is connected to the light side 38.

The operation of the idling handle 20 (see FIGS. 3 and 4) allows the load chain 41 to freely reciprocate, and the lifting chain 41a and the winding side 41a are roughly moved so that the hanging tool C is located above the center of gravity Z by eye. Set the length of the lowering 41b {change the left and right hanging angles} and return the idling handle 20 from FIG. 4 to FIG. At this time, the load of the first hook 40 (upper winding side) is set to be equal to or greater than the load of the second hook 42 (lower winding side). Next, as shown in FIGS. 5 and 6, when the chain block 36 is wound up, the eccentric suspended load W rises (grounds off) from the ground (floor surface).

When the heavy side 37 comes down as shown in FIG. 6, the switching handle 18 (see FIG. 3) is switched to the winding side, and then the operation lever 30 is rocked, whereby the arrows E and F are moved. The load chain 41 moves as described above, and the balance (levelness) of the suspended load W can be finely adjusted. Conversely, when the light side 38 of the suspended load W becomes lower as shown in FIG. 8, the switching handle 18 (see FIG. 3) is switched to the lowering side, and the operation lever 30 is rocked to operate the load chain 41. Changes as indicated by the arrow in FIG. 8, and the suspended load W becomes horizontal from the solid line to the imaginary line in FIG. In this manner, as shown in FIG. 7, it is possible to hoist the object horizontally and precisely with good balance.

If the center of gravity of the suspended load W moves for some reason or touches another object (such as a building), the load (difference in unbalance) may cause the load sheave 3 to rotate. The power to do. However, in the present invention, the reduction gear group 7
To ensure that the original load chain (without abrupt rotation of the load sheave 3) can be sufficiently decelerated and received by the (mechanical) brake unit 16 to receive the force (moment). It holds 41 positions and is highly secure.

It should be noted that the switching handle 18 is provided with a striated body 45 for remote operation.
By providing a configuration, when the switching handle 18 comes to a position out of reach of the worker, the switching operation becomes possible,
For example, the free mechanism can be locked at the alignment position (horizontal state) (switching from the idling state to the locked state).

The brake section 16 (as a lever hoist) is structured to operate when the load on the first hook 40 is larger than the load on the second hook 42. Therefore, the second
When the load on the hook 42 increases, the brake unit 16 is released. Put the switching handle 18 in the "return" position and
If 30 is fixed by the above-mentioned fixing device (locking means), the load chain 41 (load sheave 3) will remain stopped. The load sheave 3 has a triangular shape in the illustrated example, but it is preferable to set the load sheave 3 to four or more (opening angle θ
Is larger than before).

[0034]

According to the above configuration of the present invention, the following remarkable effects can be obtained.

The lowering side 41b (according to claim 1 or 2)
With the simple modification of adding the second hook 42 to the
It is possible to provide inexpensively a centering suspender having excellent operability and safety and excellent horizontal accuracy.

According to the second aspect, even a long or large-volume suspended load W can be suspended. That is,
The opening angle θ of the load chain 41 can be made sufficiently large to form an open leg.

[0037] According to the third aspect, even when the operator is out of reach or in a position, the switching operation for alignment can be reliably performed, which is convenient. (According to claim 4) a sufficiently long object (such as a bar or a shape)
Can be suspended horizontally.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a rear view partially broken away.

FIG. 3 is a sectional side view.

FIG. 4 is a sectional side view of a main part.

FIG. 5 is an explanatory diagram showing an example of use.

FIG. 6 is an explanatory diagram showing an example of use.

FIG. 7 is an explanatory diagram showing an example of use.

FIG. 8 is an explanatory diagram showing an example of use.

[Explanation of symbols]

 3 Load sheave 30 Operating lever 40 First hook 41 Load chain 41a Hoisting side 41b Lowering side 42 Second hook 45 Striatal body

Claims (4)

[Claims] 1. A centering hanger, wherein a first hook is attached to one end of a load hoist of a lever hoist on a hoist side, and a second hook is attached to the other end of a lower side of a load hoist. . 2. A first hook is attached to one end of the load chain of the lever hoist on the hoist side, and a second hook is attached to the other end of the lower side of the load chain. A centering suspender characterized by omitting the guide. 3. The centering hanger according to claim 1, further comprising a striated body for remotely controlling a switching handle for switching from the idling state to the locked state. 4. An angle θ between the hoisting side and the lowering side of the load chain around the load sheave is 45 ° to 75 °.
3. The centering hanger according to claim 1, wherein the hanger can be opened up to a predetermined maximum angle θmax of the range.