JPH065335Y2 - Multi-layer sling - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a soft sling having a special function. More specifically, due to the large force exerted on the contact portion between the sling and the sling, the contact point Damage to the sling caused by breaking or tearing of the sling, which shortens the life of the sling, and especially when the contact point forms a sharp knife-like edge depending on the object to be lifted, damage to the sling is extremely large and dangerous. In some cases, a soft sling having a function capable of coping with such a case is provided.

(Prior Art) Conventionally, various soft slings or belt-shaped slings have been proposed. However, at the contact point between the sling and the sling, the sling may be seriously damaged, for example, a steel plate cut into a certain width. The sling comes into contact with the cut end of the steel sheet when a large number of stacked pieces are lifted, and a large load is applied to the cut portion, so that the sling is seriously damaged. There are almost no proposals for measures to prevent this, and a little
No. 56-55190 (the fiber sling body is surrounded by a protective member, and a rubber sheet, felt, or other soft member is sewn on the protective member), No. 60-47787 (Sling body made of synthetic resin) No. 57-17447) (Belt slings are sewn with rubber sheets on one or both sides)
There is only a suggestion such as.

(Problems to be Solved by the Invention) As described above, when the sling made of fibers comes into contact with a sharp edge of a metal product, the weak point thereof largely appears. However, recently, the use of wire ropes has gradually decreased, and even those obtained by winding a steel plate or thin iron plate on a tubular body are often lifted by a fiber sling, and the situation in which the sling is damaged or cracked at the portion that comes into contact with its sharp edge. There is a problem that the sling is frequently worn and wear of the sling becomes severe.

(Means for Solving Problems) The present invention has been obtained as a result of various trials and errors in order to solve the above problems. For example, as shown in FIG. Sling with rolled cylinder
When it is necessary to suspend (S) through the inside of the cylinder and lift it up, the total load of the article is applied to the four points a ₁ , a ₂ , a ₃ , a ₄ which are the contact points between the sling and the cylinder. Therefore, it is natural that the sling will be broken or broken at this point, and even in the case of such a use method, a sling having a special structure that can last long without being damaged has been developed. The basic technique is as shown in FIGS. 1 and 3 in which there is a thick cloth belt (1) on the outermost surface, that is, the surface that contacts the article to be lifted, and this cloth belt is made of synthetic fiber of a predetermined size. Attached to the wrapping fabric (2). Rubber pieces (3) are attached to the back of the wrapping cloth (2) at regular intervals in advance, and a single soft sling or belt sling (4) is stacked on it, and these are held by the wrapping cloth (2). As a whole, a multilayer sling (S) is formed. To explain this more concretely, a rubber piece (3 ') in which a belt-shaped rubber sheet is cut to an appropriate length is provided on the back surface of the wrapping cloth (2) in which a thick cloth belt (1) is sewn at the center of the surface. , A pair of bags (5) continuously sewn at regular intervals on the back surface of the wrapping cloth (2),
It is stored in (5 ') (Fig. 2). A single soft sling (4) is overlaid on the back side, and the rubber piece and the single sling are both hem parts of the wrapping cloth (2) in the lateral direction.
(6) and (6 ') are attached and fixed. As a means of sealing, it is convenient to pre-sew male and female cloth fasteners (7) and (7 ') in the longitudinal direction on the outer edges of the hem portions (6) and (6'). is there. Thus, the present invention multilayer soft sling (S)
Is completed.

Described below is a further modified one based on the above-mentioned basic structure. As shown in FIG.
The rubber piece (3) described above on the surface of (1) [that is, the front side, more specifically, the surface opposite to the surface facing the wrapping cloth (2) sandwiching the cloth belt (1) in FIG. 4] The bags (5) and (5) for attaching the tongue at regular intervals are sewn on, and rubber pieces are inserted into the bag. This is one in which the rubber piece (3) directly contacts the hoisted article.

Next, although not shown, an appropriate belt or felt is interposed between the rubber piece (3) and the sling single body (4). A belt-shaped rubber sheet may be used instead of the rubber piece (3).

Each member used in the multi-layer sling of the present invention varies depending on the application, but a normal cloth belt has a thickness of 3 mm to 3.5 mm and a width of 100 mm.
~ 300mm, wrapping cloth is 1mm ~ 1.5mm thick, 1200mm wide
~ 2000mm nylon cloth, rubber piece 5mm ~ 10m thick
m, width corresponds to the cloth belt. An arbitrary single sling can be used, and various so-called soft slings or belt slings can be used as the structure.

(Operation) The operation of the multi-layer sling according to the present invention having the above-mentioned structure will be described. FIG. 3 shows a case where the tubular body (A) is suspended and the cloth belt is first attached.
Cross over so that (1) hits the edge of the cylinder. The single sling (4), which is the main member of this multi-layer sling, is stretched by the load when it is lifted.
(3) The cloth belt (1) is projected onto the single body sling (4), and this is pressed against the curved surface of the cylindrical body. That is, the cloth belt (1) also acts to push up the rubber piece (3), and contacts the curved inner surface of the cylindrical body in a curved state. At the same time, the multilayer sling (S) is bent at the contact point with the tubular body (A) as shown in the figure, but even in this state, the edge of the tubular article (1
The cloth belt (1) is in direct contact with (0), and the rubber piece (3) and the unit sling (4) behind the cloth belt are only indirectly contacted, so the damage is limited to the cloth belt. Since this way multilayer sling (S) is contacted in width wide surface to fit well to curved surfaces, as compared to the case of contact at four points of a ₁ ... a ₄ mentioned above, damage to the contact surface is very small . And a piece of rubber (3) protected by a cloth belt and a single soft sling (4)
Is less damaged.

The damaged cloth belt (1) is discarded together with the wrapping cloth (2) and replaced with a new one. Thus, the service life of the multi-layer sling of the present invention can be extended by exchanging parts of the multi-layer sling. Since the cloth belt (1) and the wrapping cloth (2) are inexpensive, there is an advantage that the replacement thereof can be economically performed with a small burden.

Since the rubber pieces (3) are attached with a predetermined gap, the multilayer sling (S) can be locally bent with a small radius.

When the rubber piece (3) is attached to the front side of the cloth belt (1), that is, when another means shown in FIG. 4 is adopted,
Also has the same effect as described above, in this case a rubber piece
Although (3) directly contacts the hoisted article and the rubber piece is greatly damaged, this may be more appropriate depending on the state of the hoisted article.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. (1) is a cloth belt having a thickness of 3.2 mm and a width of 100 mm, which is sewn to the center of a wrapping cloth (2) using nylon thread. . The wrapping cloth used is 1.2 mm thick and 220 mm wide, and (3) is a piece of rubber with a thickness of about 7 mm, width of 60 mm and length of 240 mm.
(5) and (5 ') are enclosed before and after. The bag is sewn in advance on the back side of the wrapping cloth (2), that is, on the opposite side of the surface on which the cloth belt (1) is attached.At the position directly behind the cloth belt (1), the opening is facing and constant. Mounted at intervals,
The rubber piece (3) is configured to be removable. Male and female cloth fasteners (7) and (7 ') are sewn to the outer edges of the hem portions (6) and (6') of the wrapping cloth (2). (4) is a soft sling, which is a string-shaped synthetic fiber filament that is stretched in a straight line. Wrap the body in nylon cloth, hang it on the sewing machine in the length direction and sew it, and also wrap the annular parts at both ends with cloth. Sewn ears (8) and (8 ') were used. Next, the state shown in FIG. 2, that is, the cloth belt (1) was sewn on the front side of the wrapping cloth (2), and the rubber piece (3) was mounted on the back side in the bags (5) and (5 ′). In this state, after stacking the soft sling (4) on the rubber piece, wrap the rubber piece and the soft sling with the hem parts (6) and (6 ') of the wrapping cloth (2), and fasten the fastener (7). ),
Sealing with (7 ') completes the multi-layer sling (S) of the present invention.

FIG. 4 shows that in the above embodiment, the rubber piece (3) is placed on the surface of the cloth belt (1), that is, on the front side, more specifically, on the cloth (2) with the cloth belt (1) sandwiched therebetween. It is attached to the surface opposite to the contact surface, and the installation procedure is a pair of bags (5), (5 ')
Place the cloth belt (1) on the front side by sewn it and put a rubber piece in this bag.
(3) is attached, and a large number of these are attached in parallel at predetermined intervals.

(Effect of the Invention) Since the multi-layer sling of the present invention has the above-mentioned configuration, even when the portion of the article to be lifted that comes into contact with the sling has a sharp edge, for example, the cloth belt (1) or the rubber piece (3) on the surface is ) Directly contacts the edge, the backing member, especially the sling unit (4), only contacts indirectly, and the damage is small, so the service life can be greatly extended, and the sling is inside the cylinder. When passing through, the effect of the multi-layer sling of the present invention is particularly significant. That is, since the sling is wrapped with a cylindrical special cover, the sling slides and slides inside the cover when heavy load is applied, so that the sling and the heavy object, especially the edge such as the above-mentioned rolled-up steel plate is like a blade. Adhesion and rubbing against sharp heavy objects are less likely to occur, and the sling cutting accident can be prevented well in advance.
If the cloth belt (1) on the surface is damaged, it can be discarded together with the wrapping cloth (2) and replaced with a separately prepared wrapping cloth with a cloth belt.If the rubber piece is damaged, replace only the damaged one. Well, since it is easy to replace it, it has great economic advantages and a wide range of uses and great practical value.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cross section and an appearance of a multi-layer sling of the present invention, and FIG. 2 is an explanatory view showing attachment of a wrapping cloth and a rubber piece,
FIG. 3 is an explanatory view showing a state of hoisting a tubular article,
The figure shows another embodiment, and is an explanatory view showing a case where the rubber piece is attached to the front side of the cloth belt. Symbol description S ... Multi-layer sling, A ... Cylindrical body, 1 ... Cloth belt, 2
...... wrapping cloth, 3 ... rubber piece, 4 ... soft sling (single piece), 5,5 '... bag, 6,6' ... hem section, 7,7 '
...... Cloth fasteners, 8,8 '... Ears, 10 ... Edges.

Claims (2)

[Scope of utility model registration request] 1. A cloth belt (1) is attached to the front side of a wrapping cloth (2) having a cloth fastener attached to the outer edge in the lengthwise direction, and the wrapping cloth (2) is arranged at predetermined intervals in the lengthwise direction. A pair of bags (5), (5 ') with their openings facing each other are attached, and this bag
A rubber piece (3) is installed in (5) and (5 '), and at least the sling is held by the hem portions (6) and (6') of the wrapping cloth (2).
A multi-layer sling comprising (4) encapsulated and fixed. 2. The multi-layer sling according to claim 1, wherein the rubber piece (3) is attached to either the back side of the wrapping cloth (2) or the front side of the cloth belt.