JP6555731B1 - Balance hanger - Google Patents

Abstract

The present invention provides a balance hanging tool capable of safely dropping a shackle. A balance 20 is provided with a pair of suspension pieces 21, and the balance lifting tool 1 is pin-connected to the piece 21 to suspend the balance 20. The balance lifting tool 1 includes a hanging metal fitting 10 and a pair of link bodies 3 each including a pin-connected three-node link. One end of the pair of link bodies 3 is pin-coupled to the suspension fitting 10, and the other end of the pair of link bodies 3 is pin-coupled to the suspension piece 21. Each link body 3 has the shortest distance L2 between the upper and lower pins of the central link 2b and the largest distance L3 between the upper and lower pins of the lower link 2c. The length L3 is shorter than the length L1 and the length L2 between the pins of the upper two links, and the angle formed by each upper link 2a of the link body 3 with the hanging bracket 10 as a vertex. Is limited to be less than a predetermined angle symmetrically about the vertical direction. [Selection] Figure 1

Description

It relates to a lifting balance used for transporting heavy objects at construction / building sites, factories and heavy equipment factories.

The suspension balance used for slinging work is used when it is desired to suspend a load in a well-balanced manner or when it is not desired to buffer a wire rope or the like. Various balances having a special shape and function are used from a beam shape using a round pipe. The balance has several hanging pieces. Patent Document 1 discloses such a balance (beam-shaped main body). The lower end of the wire is connected to a suspension piece provided at a predetermined position on the upper surface near the left and right ends of the beam-shaped main body, the upper end of the wire is connected to the shackle, and the shackle is suspended by the hook of the crane.

According to Patent Document 1, the lower ends of a pair of left and right equal-length and multi-node links connected by pins near the left and right ends of the beam-shaped body are connected to each other so that they can be pivoted up and down. A hanger connected to one shackle is shown. Further, a shackle cradle is provided at the center of the beam-shaped main body, and receives the shackle when lowered due to link refraction. When this lifting tool is lifted by a crane, the link is tensioned to be in a straight line state, and the beam-shaped main body is lifted while maintaining an optimum angle for hanging. Also, if the crane is lowered and the beam-shaped main body comes into contact with the ground, then the shackle is further lowered, so that the shackle can be placed on the shackle cradle, the link can be refracted and stabilized, and the shackle can be handled easily. .

Japanese Utility Model Publication No. 57-62769

According to the hanging tool of Patent Document 1, since it is hung by a link without using a wire or chain, it is not necessary to process the wire or chain when unloading. The shackle can be placed on the shackle cradle. However, on the other hand, a shackle cradle for placing the shackle must be provided at the center of the beam-shaped body. In addition, after the crane is lowered and the beam-shaped body contacts the ground, the link bending order and angle cannot be controlled, and the shackle can be properly lowered to the shackle cradle provided at the center of the beam-shaped body. Nor.
The present invention is based on the above-mentioned viewpoint and provides a balance hanging tool capable of safely dropping a shackle.

In order to solve the above-mentioned problems, a balance lifting tool of the present invention is a balance that suspends the balance by connecting a pair of suspension pieces provided on the balance with a pin pivotably to a pair of suspension pieces. In the hanging tool,
With shackle,
A pair of link bodies composed of three links linked in order from the top so as to be swingable about a pin as a pivot;
One end of the pair of link bodies is pivotably connected to the shackle with a pin as a pivot, and the other end of the pair of link bodies is swingable with a pin as a pivot relative to the pair of suspension pieces. Concatenate,
Each link body has the shortest distance L2 between the pins of the three links in which the center link is pivoted to the upper link and the lower link, and the lower link is the hanging link. The distance L3 between the pins pivoted on the piece and the central link is the largest, L3,
The length L3 is shorter than the length of the interval L1 and the length L2 between the pins, the upper link being pivoted by the shackle and the center link, respectively, and the shackle is the apex. An angle formed by each upper link of the link body is limited to be equal to or less than a predetermined angle symmetrically about the vertical direction.

Also in the present invention, the use of the link body eliminates the need for processing of wires and chains when unloading. Furthermore, because the angle between the upper pair of links is limited, the movement is limited so that only the center link and the lower link move first, and then only the upper link and the center link move. It is possible to move the link body as planned. For this reason, there is an effect that when the shackle is lowered, it can be placed at the center of the center side of the balance. Further, if the upper link and the lower link are made of two plates, the center link is sandwiched, so that there is an effect that it is difficult to fall down and is stable.

It is a figure which shows the suspension balance by a present Example, FIG. 1A is a side view, FIG. 1B is a front view, FIG. 1C is component drawing, FIG. 1D is a figure which shows a bending state. It is a figure which shows a mode that a suspension balance bends. It is a figure which shows another Example. It is a figure which shows another Example.

The balance hanging tool of the present invention will be explained with reference to the drawings according to an embodiment.
In the following invention, the balance may be traded as an integral part of the balance suspension, or the balance and the balance suspension may be traded separately. In this case, the user may prepare a balance specialized for his own slinging work.

FIG. 1 shows a balance lifting tool 1 according to this embodiment. The balance 20 is, for example, a square pipe, an H-shaped beam, or another beam of steel, and suspension pieces 21 are fixed to the left and right ends of the upper surface. The balance hanging tool 1 has a pair of lower ends of a pair of link bodies 3 each including three links of a link 2a (upper link), a link 2b (center link), and a link 2c (lower link) in order from the top. Are respectively connected to the suspension pieces 21 by pins 5. The upper ends of each of the pair of link bodies 3 are connected to the hanging metal fitting 10 by pins 4a. The link 2a and the link 2b, and the link 2b and the link 2c are connected by a pin 4b and a pin 4c, respectively. Each of the pins 5, 4a, 4b, and 4c is a horizontal pin whose axial direction is a direction perpendicular to the length direction D1 of the balance 20, and the link 2a, the link 2b, the link using these pins as pivots. 2c can swing. In this embodiment, the pin 5, the pin 4 a, the pin 4 b, and the pin 4 c are constituted by a bolt 6 and a nut 7.

FIG. 1C shows a portion of the hanging metal fitting 10 taken out from the link 2a. The hanging metal fitting 10 has a shackle body 11 that can swing about a horizontal pin 13 with the length direction D1 of the balance 20 as an axial direction on the upper part of the angle holding plate 12, and the shackle body 11 is pivoted. Engaged by a crane (not shown). The pin 13 includes a bolt 15 and a nut 14.

The angle holding plate 12 is provided with a stopper 17 for limiting a lower limit at which the link 2a can swing around an axis about the pin 4a. The stopper 17 is a so-called detent in which the angle R1 formed by the left and right links 2a with respect to the vertical direction D2 is limited so as not to be smaller than a predetermined angle (acute angle, for example, 30 degrees). Therefore, when both the left and right links 2a swing to the lowest side, the angle R1 + R1 formed by the left and right links 2a with the hanging bracket 10 as the apex is, for example, 60 degrees when the angle R1 is 30 degrees. . When the vertical direction D2 is set as the center, it is restricted so as not to become smaller than a predetermined angle symmetrically.

The length between the pin 5, the pin 4a, the pin 4b, and the pin 4c in each of the pair of link bodies 3 will be described. The pair of link bodies 3 have the same shape, and only one of them will be described. The length between the pin 4a and the pin 4b is L1, the length between the pin 4b and the pin 4c is L2, and the length between the pin 4c and the pin 5 is When the length is L3, the length L3 is the longest, the length L1, and the shortest is the length L2. L3 is shorter than the length obtained by adding L1 and L2. When the link bodies 3 are aligned with each other at an angle of 60 degrees (the state shown in FIG. 1B), the lengths L1, L2, L3 are set so that the angle between the balance 20 and the link body 3 is 60 degrees. Is allocated. That is, the lengths are distributed so that the pair of hanging pieces 21 and the hanging metal fitting 10 are positioned at the apexes of the regular triangle, respectively.

When the crane is lowered and the balance 20 is grounded and then further lowered, the link 2c overlaps the balance 20 as shown in FIG. 1D, and the link 2a overlaps the link 2c, and the links 2a and 2c It is desirable to distribute the length so as to be close to the horizontal because the final position of the hanging metal fitting 10 is closest to the ground.

The link 2a and the link 2c are produced by overlapping two sheets of plate materials q1 and q2 and sandwiching a link 2b made of one plate material q3 (FIG. 1A).

In FIG. 1B, one-dot broken lines E1 and E2 are trajectories drawn by the pin 4b and the pin 4c when the crane is lowered and the balance 20 is grounded and then further lowered or when the balance 20 is lifted. .

FIG. 2 is a diagram illustrating the operation of the balance lifting tool 1.
FIG. 2A shows a state in which a crane hook is hooked on the shackle body 11 and lifted. The link body 3 is in a straight line due to tension. When the scale 20 is lowered from this state and the balance 20 comes in contact with the ground, the hanging metal fitting 10 is further lowered by further lowering the hook (FIG. 2B). At this time, since the rotation angle of the link 2a is limited by the stopper 17, the angle (R1 + R1) formed by each other is maintained at 60 degrees. On the other hand, the link 2b and the link 2c are bent so that the position of the pin 4c approaches the center side of the balance 20 by its own weight. The position of the pin 4c is closer to the center side of the balance 20 than the pin 4b and bends further (FIG. 2C). Then, the link 2c is placed on the balance 20 (FIG. 2D). Until this time, the angle (R1 + R1) formed by the link 2a is maintained at 60 degrees. Further, when the hanging metal fitting 10 is lowered, the angle formed by the link 2a starts to increase, and the link 2a is placed on the link 2c. At this time, the link 2b is in a state of being sandwiched between the plate materials q1 and q2 constituting the link 2a and the link 2c, respectively, and is difficult to fall down. For this reason, the hanging metal fitting 10 is stable in a state where it is self-supporting on the folded link body 3.

According to the present embodiment, since the minimum value of the angle formed by the pair of links 2a is limited to a predetermined angle, only the link 2b and the link 2c move first, and then only the link 2a and the link 2b move. In addition, the movement can be restricted. For this reason, the link body 3 can be moved as planned as shown in FIG. 2, and when the hanging fitting 10 is lowered, the hanging fitting 10 can be placed in the center of the center side of the balance 20. And the link 2a and the link 2c have an effect that the link 2a and the link 2c are not easily collapsed and are stable. Further, by using the link body, there is an effect that the processing of the wire and the chain when the load is unloaded as in the conventional case is unnecessary.

FIG. 3 is a diagram showing a second embodiment. The change from the first embodiment is that a function for regulating the movement of the shackle body 11 is added. There are three restrictions on the movement of the shackle body 11. The first point is that when the hook of the crane is lowered and the tension for hanging the shackle body 11 is completely released, the shackle body 11 is prevented from rotating completely around the axis of the pin 13 and falling down completely. It is a function to do. Next, it is a function which makes the shackle body 11 fall easily. And it is a function which encourages the shackle body 11 to fall down in one direction.

With reference to FIGS. 3A and 3B, in this embodiment, the shape of the shaft hole 18 of the angle holding plate 12 on which the pin 13 is pivoted is an oval shape (rounded rectangle. Two parallel lines of equal length) It consists of two semicircles.) A plate 19 having a pair of holding portions 19a and 19b with which the arm portion 11a of the shackle body 11 abuts and a rollover surface 19c with which the base portion of the shackle body 11 abuts is provided. The roll surface 19c is provided so as to collide with the base portion 11b on the side opposite to the side where the shackle body 11 is desired to be tilted.

With reference to FIG. 3C, the relationship between the configuration and functions of this embodiment will be described. The function of making the shackle body 11 easy to fall down is realized by the oval shape of the shaft hole 18. Since the contact area between the pin 13 and the shaft hole 18 is limited, the shackle body 11 is likely to fall down. The function of encouraging the shackle body 11 to fall in one direction is realized by the oval shape of the shaft hole 18 and the rollover surface 19c. While the shackle body 11 suspends the angle holding plate 12, the pin 13 (FIG. 2) is in contact with the upper side of the oval shape of the shaft hole 18, but the crane hook is further lowered and the angle holding plate 12. When the pin stops descending, the pin 13 moves to the lower side of the shaft hole 18. At this time, the base portion 11b collides with the rollover surface 19c and the shackle body 11 falls to the opposite side of the rollover surface 19c. The function of preventing the body from falling completely is realized by the pair of holding portions 19a and 19b with which the arm portion 11a of the shackle body 11 abuts. Since the holding portions 19a and 19b hold the arm portion 11a of the shackle body 11, the shackle body 11 does not fall down completely. For this reason, when removing the hook of a crane, since it is not necessary to raise the shackle body 11, work becomes easy. The reason why the angle of the holding part 19a is inclined is that it is easy to hook the crane hook. The reason why the holding part 19b is vertical is the function of tilting the shackle body 11 in only one direction. This is because the shackle body 11 can be easily manually tilted toward the holding portion 19a even if the movement does not work correctly. As shown in FIG. 3D, the holding portion 19b may have an oblique angle.

According to this embodiment, when the hook of the crane is lowered and the tension for hanging the shackle body 11 is completely released, the shackle body 11 rotates around the axis of the pin 13 and completely falls down. Can be prevented. The direction in which the shackle body 11 falls can be easily fallen in only one direction.

FIG. 4 is a diagram showing a third embodiment. This embodiment is different from the other embodiments in that a guide block 22 for the link body 3 is provided on the balance 20. The guide block 22 is provided at a position on the balance 20 when the link 2c is folded. Each guide block 22 is composed of block pieces 22a and 22b provided so as to sandwich the link 2c, and the opposing surfaces of the block pieces 22a and 22b are tapered surfaces in which the interval w decreases from top to bottom. Yes. By providing the guide block 22, the link 2 c can be mounted at a predetermined position when the link 2 c is folded. For this reason, there exists an effect that the hanging metal fitting 10 becomes more stable.

DESCRIPTION OF SYMBOLS 1 Balance lifting tool 2a Link 2b Link 2c Link 3 Link body 4a Pin 4b Pin 4c Pin 5, 13 Pin 6, 15 Bolt 7, 14 Nut 10 Hanging bracket 11 Shackle body 11a Arm part 11b Base part 12 Angle holding plate 13 Pin 17 Stopper 18 Shaft hole 19 Plate 19a, 19b Holding part 19c Rolling surface 20 Balance 21 Hanging piece 22 Guide block 22a, 22b Block piece

Claims (3)

In a balance hanging tool that suspends the balance by connecting a pin as a pivot to a pair of suspension pieces provided on the balance at an interval,
With shackle,
A pair of link bodies composed of three links linked in order from the top so as to be swingable about a pin as a pivot;
One end of the pair of link bodies is pivotably connected to the shackle with a pin as a pivot, and the other end of the pair of link bodies is swingable with a pin as a pivot relative to the pair of suspension pieces. Concatenate,
Each link body has the shortest distance L2 between the pins of the three links in which the center link is pivoted to the upper link and the lower link, and the lower link is the hanging link. The distance L3 between the pins pivoted on the piece and the central link is the largest, L3,
The length L3 is shorter than the length of the interval L1 and the length L2 between the pins, the upper link being pivoted by the shackle and the center link, respectively, and the shackle is the apex. The balance hanging tool is characterized in that an angle formed by each upper link of the link body is limited to be equal to or less than a predetermined angle symmetrically about the vertical direction.
The balance hanger of claim 1,
The balance suspending tool, wherein the upper link and the lower link are configured by sandwiching the central link, which is a single plate member, between two plate members.
The balance hanger of claim 1,
The shackle has an angle holding plate and a shackle body that is pivotally connected to an oval shaft hole provided in the angle holding plate with a pin as a pivot.
A rolling surface that urges the shackle body to swing to the other side when the pin moves downward in the shaft hole; and a holding portion that limits a range in which the shackle body swings A balance hanging tool characterized by comprising: