JP5814661B2 - Steel suspension equipment - Google Patents

Description

  The present invention relates to a steel material suspension device that can safely suspend a plurality of steel materials such as H-shaped steel.

  To lift and transport steel such as H-shaped steel in construction works such as mountain retaining works, temporary piers, construction works, etc. A slinging method in which both ends of each suspension cable are hooked to a crane hook is widely used.

Although the sling method has the advantage that multiple pieces of steel can be lifted together, there is a risk that the steel will fall due to unstable loading during transportation, and a lot of time is required for slinging and unpacking. There is a problem that labor is required and work efficiency is poor. Furthermore, since there is little movement of the steel material at the time of ground cutting or landing, there is a high risk that the slinging operator will accidentally get injured by pinching the finger.
Furthermore, in order to secure the insertion space for the suspension rope, square bars are interposed under the steel material. However, when stacking multiple steel materials, the total height of the stacked steel materials is increased by the cumulative amount of square material. Since it becomes high, instability increases and it is dangerous.

In order to solve the above-described problem of slinging, Patent Literatures 1 and 2 propose steel hanger for clamping a steel flange.
These steel suspensions are composed of a main body plate and a pair of claw bodies having an L-shape or a U-shape that are pivotally supported at both ends of the main body plate, and the pair of claw bodies are used as flanges of the steel material. It is structured to be hooked and clamped.

Japanese Patent Laid-Open No. 9-216785 JP 2001-139278 A

In the above-described conventional steel hanger, although steel can be safely lifted in units of one piece, a plurality of pieces of steel cannot be lifted together.
In addition, the pair of claws has a special shape, and the pivotal support structure of the claws is complicated.
Furthermore, in order to lift a piece of steel material horizontally, it is necessary to attach two or more sets of steel material suspensions individually, and also when detaching, a plurality of suspension devices must be individually removed, which makes it easy to attach and detach. There is a problem of being bad.

In addition, a lifting device has been proposed that uses a motor, cylinder, etc. as a steel material holding means to automatically hold and separate steel materials, but in addition to the problem that multiple pieces of steel materials cannot be lifted together, there is a problem of high cost. There is.
Furthermore, since it has heavy equipment such as power supply equipment and fluid unit equipment, the apparatus cannot be easily moved and used, resulting in low convenience.

This invention is made | formed in view of the above point, The place made into the objective is to provide the following at least 1 suspension apparatus of steel materials.
(1) With a simple suspension structure, multiple pieces of steel can be safely lifted together.
(2) It should be possible to easily set and release the steel.
(3) Excellent convenience without being restricted by the place of use.

A first invention of the present application is a steel material suspension device that collectively lifts a plurality of steel materials arranged in parallel, the horizontal frame connectable to a suspension rope, and the horizontal frame across an interval straddling both sides of the plurality of steel materials A plurality of regulating legs depending on the plurality of legs, and a plurality of regulating legs that are pivotally provided at the lower part of each regulating leg, and that can abut against the lower surface of the outer upper flange of the plurality of steel members arranged in parallel and the side surface of the web. A latching portion and a pivoting operation mechanism that pivots the plurality of latching portions are formed, a steel material accommodating space is formed between the plurality of regulating legs, and the latching operation mechanism allows the latching operation to be performed. The part can be switched by turning horizontally between the latch release position and the latch position with the steel material, and the latch part is a columnar rotation provided rotatably at the lower part of the regulation leg A suspension that is inserted through the body and the regulating leg, and whose lower part is connected to the rotating body. A shaft, a fixed claw plate projecting laterally from the outer peripheral surface of the rotating body, and a movable claw plate arranged to overlap with the fixed claw plate and pivotally supported on the fixed claw plate, The movable claw plate has a first claw portion on the upper side and a second claw portion on the lower side, and the joining portion of the both claw portions is turnable in the vertical direction to the fixed claw plate via the support shaft. A direction in which the second claw portion of the movable claw plate is spaced apart from the side surface of the steel web so that the tip of the first claw portion protrudes upward from the fixed claw plate in the unloaded state of the movable claw plate. A spring force is always applied to the movable nail plate toward the first nail portion and the second nail portion constituting the movable nail plate, and the distal end portion of the first nail portion is located on the outermost side together with the fixed nail plate. When the steel flange is in contact with the lower surface of the steel flange at the same time, the tip of the second claw that rotates to the horizontal position around the support shaft is located on the outermost web. Characterized in that it associated to a side abutment.
According to a second invention of the present application, in the first invention described above, the rotation operation mechanism of the latching portion includes a rotation shaft pivotally supported on a horizontal frame, a drive cam provided on the rotation shaft, and an end portion of the rotation shaft. An operation handle provided on each of the suspension shafts, a driven cam provided on an upper portion of each suspension shaft, and a rod connected to each of the driven cams located on the left and right sides with the drive cam as a center. And
A third invention of the present application is characterized in that, in the first invention described above, an adjustment bolt is screwed to the second tip.

The present invention has at least one of the following effects.
(1) Suspend the suspension device so that the opposing regulation legs straddle the steel material, and support the operator to hold multiple steel materials arranged in parallel, only by rotating the multiple latching sections. Because it can, you can safely lift multiple steel materials together.
(2) Since the setting operation and the releasing operation to the steel material can be performed safely and easily only by the rotation operation of the plurality of latching portions constituting the suspension device, the work efficiency is improved.
(3) The suspension device according to the present invention does not require a power supply facility or a fluid unit facility as well as a motor and a cylinder.
Therefore, since the suspension device can be easily moved and used according to the site, it is excellent in convenience.
(4) Since the latching portion is composed of a pair of claw plates having a simple shape, the structure of the suspension device is simple and the production cost can be reduced.
(5) The entire length of the movable claw plate can be freely changed by screwing the adjusting bolt onto the second tip of the movable claw plate.
Therefore, it is possible to smoothly support the lower surface of the steel flange in cooperation with the movable claw plate and the side surface of the web.

Overall perspective view of a steel suspension device according to the present invention Side view of the suspension device in a state where multiple steel materials are lifted together It is explanatory drawing when a latching part exists in a latch release position with steel materials, (a) of each figure is a front view of a latching part, (b) is a top view of a latching part It is explanatory drawing when a latching part exists in a latching position with steel materials, (a) of each figure is a front view of a latching part, (b) is a top view of a latching part. Front enlarged view of the fixed nail plate and movable nail plate constituting the latching part Model diagram of the rotation operation mechanism that operates the rotation of the suspension shaft Model diagram of lifting device separated from steel BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an example of stacking three or more pieces of steel that can be lifted by a steel material suspension device according to the present invention, (a) is an explanatory diagram of an example of stacking three pieces of steel, Explanatory drawing of an example of stacking 4 pieces of steel The perspective view of the latching part which abbreviate | omitted one part which concerns on another form Side view of a steel suspension device according to another embodiment with a safety belt Sectional drawing of XI-XI in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<1> Outline of Steel Suspension Device FIG. 1 is an overall perspective view of a steel material suspension device partially broken, and FIG. 2 is a side view of the suspension device in a state where a plurality of steel materials A and A are lifted.

The suspension device according to the present invention is a device for lifting together steel materials A and A arranged in parallel in two rows, with a horizontal frame 10 having a square shape and an interval that straddles both sides of the parallel steel materials A and A. A plurality of restricting legs 20 that are vertically suspended from the four corners of the horizontal frame 10, and a lower flange of each of the restricting legs 20 that is pivotable about the vertical axis and that is parallel to the outer flanges of the steel materials A and A and a ₁ lower and side surfaces and capable of abutting locking portions 30 of the web a _2, comprises a rotational operation mechanism for turning operations of the plurality of engaging portions 30 manually. The main components will be described below.

<2> Horizontal Frame The horizontal frame 10 is a rigid structure that is rigid enough to prevent bending deformation of the plurality of regulating legs 20 and can be cantilevered.
In this example, the case where the horizontal frame 10 is constituted by a frame formed by horizontally connecting four connecting members 11 between the upper portions of the plurality of restricting legs 20 and connecting both ends of each connecting member 11 to the restricting legs 20 is shown. As shown, the horizontal frame 10 may be a plate. The planar shape of the horizontal frame 10 is not limited to the illustrated square, and may be a rectangle.
A hook 12 for connecting a plurality of suspension ropes 13 or a connecting element similar thereto is provided on the upper part of the horizontal frame 10 and can be lifted by a crane via the plurality of suspension ropes 13.

<3> Restriction leg The restriction leg 20 that hangs downward at the corner of the horizontal frame 10 transmits a suspending load to the horizontal frame 10, and rigid body that restricts the parallel steel materials A and A from spreading in the separation direction. A through hole is formed in the shaft core.

The opposing regulation legs 20 are provided at intervals that can be sheathed across the steel materials A and A arranged in parallel, and the steel materials A and A arranged in parallel are accommodated inside the plurality of opposing regulation legs 20. An accommodation space is formed.
In order to suppress the spread of the steel materials A and A arranged in parallel, it is desirable that the facing interval of the regulating legs 20 be a distance that is close to the transverse width of the steel materials A and A.
Regarding the number of restriction legs 20 installed In this example, two restriction legs 20 are arranged on one side of the accommodation space of the steel materials A and A arranged in parallel, but three restriction legs 20 are provided on each side of the accommodation space. You may provide above.
The total length of the regulation leg 20 is set to an appropriate length in consideration of the number of steps of the steel material A to be lifted.

<4> engaging section engaging section 30 at two positions of the upper flange A ₁ of the lower surface and the side surface of the web A ₂ of the steel A at the same time in contact with the site, comprising at least a pair of nail plates.
By the cooperation of a pair of opposing latching portions 30 and 30 arranged with the steel materials A and A sandwiched therebetween, the steel materials A and A arranged in parallel can be held from both sides.

  The illustrated embodiment will be described. The latching portion 30 is disposed so as to be inserted through the shaft core of the regulating leg 20 and a columnar rotating body 31 rotatably provided at the lower portion of the regulating leg 20. And a suspension shaft 32 whose upper part is rotatably fixed to the regulation leg 20 or the horizontal frame 10, a fixed claw plate 33 projecting laterally from the outer peripheral surface of the rotating body 31, and the fixed claw plate 33. And a movable claw plate 34 pivotally supported by a part of the fixed claw plate 33.

<4.1> Rotating body The rotating body 31 includes a main body 31a and a columnar small-diameter portion 31b formed on the upper portion of the main body 31a, and a step surface 31c is formed between the main body 31a and the small-diameter portion 31b. .
The small-diameter portion 31a of the rotating body 31 positioned on the same axis as the regulating leg 20 is slidably fitted into the lower part of the through hole having a circular cross section of the regulating leg 20, and the step surface 31c is in contact with the lower surface of the regulating leg 20. Positioned in contact.
The cross-sectional shape of the main body 31a is not limited to the illustrated circle, and may be a polygon.

<4.2> Suspension shaft The suspension shaft 32 is a rod for transmitting the load applied to the rotating body 31 to the horizontal frame 10 via the regulating leg 20 and for rotating the rotating body 31, and the lower portion of the rotating shaft 32 is the rotating body. The upper end of the shaft 31 is fixed to the restriction leg 20 or the horizontal frame 10 so as to be rotatable.

<4.3> Fixed Claw Plate With reference to the enlarged view of the latching portion 30 shown in FIG. 5, the fixed claw plate 33 has an inverted L shape that supports the lower surface of the upper flange A ₁ of the steel material A. The plate body is arranged in parallel with the axis of the main body 31a of the rotating body 31 and projects sideways.
A first abutting portion 33 a is formed on the uppermost portion of the fixed claw plate 33, and the first abutting portion 33 a contacts the lower surface of the upper flange A ₁ of the steel material A.

<4.3> Movable Claw Plate The movable claw plate 34 is a substantially V-shaped or L-shaped plate that contacts the side surface of the web A ₂ of the steel material A. The upper claw plate 34a and the lower claw plate 34 A second claw portion 34b.
The movable claw plate 34 is rotatable with respect to the fixed claw plate 33 via a support shaft 35 inserted through the joining portion of both the claw portions 34a and 34b.

The first claw portion 34 a functions to contact the lower surface of the upper flange A ₁ of the steel material A and rotate the movable claw plate 34, and the tip of the first claw portion 34 a is in an unloaded state of the movable claw plate 34. Projecting upward from the fixed claw plate 33.

The distal end of the second pawl portion 34a to form a second contact portion 34c at its distal end, said second contact portion 34c is engageable with the side surface of the web A ₂ of the steel A.

In this example, the adjustment bolt 36 is screwed onto the tip of the second claw portion 34c, and the second contact portion 34c is formed on the end surface of the bolt head.
The adjustment bolt 36 is provided in order to increase the pressing force of the steel A on the side surface of the web A ₂ by adjusting the screwing length of the adjustment bolt 36.

An example of how to use the adjustment bolt 36 will be described.
If the screwing length of the adjustment bolt 36 is shortened in advance, the adjustment bolt 36 can be prevented from colliding with the side surface of the web A ₂ of the steel material A when the movable claw plate 34 rotates. the second contact portion 34c can be pressed into the side of the web a ₂ of steel a to the end face of the bolt head by adjusting long threaded out length of the adjustment bolt 36 after finishing the rotation.
The adjusting bolt 36 is not essential and may be omitted.

<4.4> Claw portion of movable claw plate The protrusion length and the crossing angle of the first claw portion 34a and the second claw portion 34b constituting the movable claw plate 34 are such that the front end portion of the first claw portion 34a is a fixed claw plate. 33 together with the first contact portion 33a of when in contact simultaneously with the lower surface of the flange a ₁ of the steel a, the second contact portion of the distal end of the second pawl portion 34b pivoted to the horizontal position about the support shaft 35 34c has associated so as to be in contact with the side surface of the web a ₂ of the steel a.

<4.5> Return Spring A return spring 37 is disposed so that the movable claw plate 34 is always urged around the support shaft 35 in the direction in which the second claw portion 34 b approaches the upper portion of the fixed claw plate 33. .
Arrangement position of the return spring 37 is not limited to the embodiment shown, short second claw portion 34b is constantly spring force toward a direction away from the side surface of the web A ₂ steel A of the movable pawl plate 34 acts Thus, it is sufficient that the return spring 37 is provided.
The rotation of the movable claw plate 34 in the counterclockwise direction (FIG. 5) is regulated by a stopper 38 provided on the fixed claw plate 33.

<5> Rotation operation mechanism of the latching portion The rotation operation mechanism of the latching portion is for collectively operating the rotation between the latching position of the steel material A by the latching portion 30 and the latching position. Mechanism.

3 and 4 show the rotation range of the latching portion 30 in which the fixed nail plate 33 and the movable nail plate 34 are rotated in accordance with the rotation of the rotating body 31, and FIG. The front view of FIG. 30 and (b) respectively show a plan view of the latching portion 30.
Figure 3 is shows a state in which the fixing claw plate 33 and the movable claw plate 34 of the engaging portion 30 is positioned in the locking release position spaced from the flange A ₁ of the steel A, the hook portion 30 when in this condition The steel material A can be lifted and lowered freely.
Figure 4 shows a state in which the engaging portion 30 is in the intruded locking position fixing the nail plate 33 and the movable pawl plate 34 by 90 degrees rotation from the position of FIG. 3 on the inner side of the flange A ₁ steel A .

Referring to FIGS. 1 and 2, the rotation operation mechanism of the latching portion 30 will be described. The two drive cams 41 are fixed on the axis of the rotary shaft 40 pivotally supported on the horizontal frame 10 at a distance, and the vertical The follower cam 43 is fixed to the upper part of each suspension shaft 32 located at the position.
The drive cam 41 is connected to the driven cams 43, 43 located on the left and right sides with the rod 44 as a center.
By rotating the operating handle 42 provided at the end of the rotating shaft 40, the rotation of the rotating shaft 40 is transmitted in the order of the drive cam 41, the rod 44, and the driven cam 43, and finally all the operations are performed. The suspension shafts 32 and 32 rotate in a predetermined direction.

  In FIG. 1, reference numeral 14 denotes a pair of stoppers for restricting the rotational position of the handle 42 in the left-right direction.

FIG. 6 shows a model diagram of a rotation operation mechanism that operates rotation of a pair of suspension shafts 32 and 32 facing each other.
As shown in the figure, a known universal connecting device 45 configured by combining a ball joint and a bearing is attached to both ends of each rod 44, and connected to each cam 41, 43 via the universal connecting device 45. The horizontal rotation by the rotation shaft 40 can be smoothly converted and transmitted to the vertical rotation, and the rotation of the pair of suspension shafts 32 and 32 can be operated.

In addition to the mechanism described in this example, a known mechanism may be applied as the rotation operation mechanism of the latching portion 30.
Further, in this example, the case where the rotations of all the latching portions 30 are operated at the same time will be described. However, the pivoting operation is performed by a pair of opposing latching portions 30 or each latching portion 30 is individually operated. It may be a mechanism that performs a rotating operation.

[I] Steel Material Lifting Method <1> Steel Material Lifting Preparation In conventional slinging, it is necessary to interpose a square member below steel material A in order to form an insertion space for a suspension cable.
In the present invention, since the steel materials A and A arranged side by side are lifted so as to hold the upper both sides, it is not necessary to provide a square material at the lower portion of the steel material A, and the steel materials A and A to be lifted are ground B as shown in FIG. You can leave it grounded.

<2> Descent of suspension device As shown in FIG. 7, the suspension device is suspended from a crane and moved to just above steel materials A and A arranged in parallel.
The suspension device is lowered and straddled on both sides of the steel materials A and A in which the opposing regulation legs 20 and 20 are arranged in parallel.

Since the latching body 30 at the lower part of the regulation leg 20 constituting the suspension device has been rotated in advance to the latching release position, when the latching body 30 straddles the steel materials A and A, the fixed claw plate 33 and the movable claw The plate 34 does not collide with the flange A _{1 of the} steel material A.
As shown in FIG. 3A, when the fixed claw plate 33 and the movable claw plate 34 reach below the upper flange A ₁ of the steel material A, the descent of the suspension device is finished.

<3> Horizontal Rotation of the Latching Section Next, as shown in FIG. 4, when the operator operates the rotation operation mechanism described above, the rotating bodies 31 provided at the lower portions of the respective regulation legs 20 are substantially 90 at a time. Rotate degrees. As a result, the fixed claw plate 33 and the movable claw plate 34 provided integrally with the rotating body 31 are horizontally rotated around the rotating body 31 and enter under the upper flange A ₁ of the steel material A.
In the present invention, after hanging the suspension device on the steel materials A and A arranged in parallel, all the latching portions 30 are set at the latching position by a simple operation in which the operator simply turns the handle 42 in a specific direction. can do.

<4> Lifting of the lifting device Next, when the entire lifting device is gently lifted with a crane, the fixed claw plate 33 and the movable claw plate 34 provided at the lower part of the regulation leg 20 are positioned above the steel material A as shown in FIG. steel a in parallel arranged hooking of the lower surface and the side surface of the web a ₂ of the flange a _1, a is lifted.

<4.1> Rotation of movable claw plate The latching operation of the fixed claw plate 33 and the movable claw plate 34 will be described in detail with reference to FIGS.
FIG. 4 shows the movable claw plate 34 in a free state. Since the movable claw plate 34 is biased counterclockwise by receiving the spring force of the return spring 37, the tip of the upper first claw portion 34a is shown. Protrudes above the upper surface of the fixed claw plate 33.
Figure 5 shows the movable claw plate 34 of the load condition, when the entire suspension device rises, the tip of the first pawl portion 34a of the upper abuts the lower surface of the flange A ₁ of upper steel A, after that hanging When the device continues to rise, the movable claw plate 34 rotates around the support shaft 35 in the clockwise direction.

With increasing the rotation of the movable pawl plate 34 of the suspension device, the upper surface of the fixed pawl plate 33 (first contact portion 33a) to support the steel A in contact with the lower surface of the flange A ₁ of upper.
Movable claw plate 34 stops rotating when the upper surface of the fixed pawl plate 33 (first contact portion 33a) is brought into contact with the lower surface of the flange A ₁ of upper.
When the movable claw plate 34 stops rotating, the second claw portion 34b is rotated to the horizontal position, and the tip of the adjustment bolt 36 (second contact portion 34c) screwed to the second claw portion 34b is the steel material A. The horizontal displacement of the steel material A is restrained by coming into contact with the side surface of the web A ₂ .

Latching operation to the flange A ₁ of the lower surface and the side surface of the web A ₂ of the upper steel A by the two nail plate 33, 34 described above, arranged in parallel to the steel A, the hook portions 30, 30 positioned on both sides of the A At the same time.

<4.2> Load Support As shown in FIG. 2, the vertical load of the steel materials A and A acting on the fixed claw plate 33 is transmitted to the horizontal frame 10 via the rotating body 31 and the suspension shaft 32. Supported.
Further, the load (force) that the steel materials A and A acting on the movable claw plate 34 try to spread to the side is supported by the rigidity of the regulating leg 20 integrated with the rotating body 31.
In FIG. 2, the reaction force of the load (force) that the steel materials A and A acting on the second claw portions 34 b of the movable claw plates 34 and 34 facing each other spread right beside the steel materials A and A arranged in parallel. It is generated as a force that presses both side surfaces of the outer web A ₂ . This pressing force is indicated by an arrow in FIG.

<4.3> Reason for supporting the steel material at two points Next, the reason why the present invention makes the lower surface of the upper flange A ₁ of the steel material A and the side surface of the web A ₂ contact each other will be described.
Arranged in parallel with the steel A, the only supports the outer lower surface of the flange A ₁ of A, steel A, steel for the abutment of the A decreases A, A falls to rotate.
In the present invention, in order to prevent the rotation of the steel materials A and A, the contact point with the steel material A is increased, and the side surfaces of the web A ₂ of the steel material A are simultaneously supported by the tip portions of the movable claw plates 34 facing each other.

As described above, in the present invention, the suspension device is suspended so that the opposing regulation legs 20 of the suspension device straddle the steel materials A and A, and the operator only performs the simple rotation operation of the rotating body 31. The steel materials A and A arranged in parallel with the device can be safely lifted together.
Moreover, since it supports so that the steel materials A and A may be held by the latching | locking part 30 of a total of four places, the package of steel materials A and A can be conveyed stably to a desired position.

[II] Steel material suspension method In order to suspend the steel materials A and A, an operation opposite to the lifting operation described above may be basically performed.

<1> Descent of suspension device That is, the suspension device is suspended at a predetermined position, and the lower surfaces of the steel materials A and A are landed on the ground or the like.
When continuing to down hanging hanging device, the upper surface (first contact portion 33a) of the fixing nail plate 33 as shown in FIG. 5 is disengaged from the lower surface of the flange A ₁ of upper steel A.
As the suspension device descends, the spring force of the return spring 37 causes the movable claw plate 34 to rotate counterclockwise about the support shaft 35, and to the second claw portion 34 b as the movable claw plate 34 rotates. the tip of the adjusting bolt 36 provided (second contact portion 34c) is raised, automatically away from the side of the web a ₂ of the steel a.

<2> Horizontal rotation of the latching portion Next, when the nail plates 33 and 34 are separated from the steel material A until the state shown in FIG. 4, the above-described rotation operation mechanism is operated and provided at the lower portion of the regulation leg 20. The latching portion 30 is rotated horizontally by approximately 90 degrees in the opposite direction to that at the time of setting to switch the both claw plates 33 and 34 to the latch release position.
FIG. 3 shows a latch release state in which the fixed claw plate 33 and the movable claw plate 34 are exposed to the outside of the steel material A.
In the present invention, by simply swinging the handle 42 in the opposite direction, all the latching portions 30 are simultaneously rotated so that the fixed claw plate 33 and the movable claw plate 34 are positioned outside the steel materials A and A. Can be switched to the latch release position.

<3> Lifting of lifting device Finally, as shown in FIG. 7, the lifting device is lifted to leave only the steel materials A and A.
Since the fixed claw plate 33 and the movable claw plate 34 are retracted to a position where they do not collide with the flange A _{1 of the} steel material A, all the latching bodies 30 can be raised at the same time.

<4> Movement of Suspension Device The suspension device according to the present invention does not include a power supply facility and a fluid unit facility as well as a motor and a cylinder.
Therefore, since the suspension device can be easily moved and used according to the site, it is highly convenient.

[III] About lifting in the form of stacked steel materials The steel lifting device according to the present invention is not only capable of lifting two pieces of flat steel materials A and A together, but also as shown in FIG. Even three or more pieces of steel material A stacked can be lifted.

  (A) of FIG. 8 shows a form in which a separate piece of steel A is stacked at the upper center of the lower steel A, A arranged in parallel, and (b) in FIG. 8 shows the lower steel A A arranged in parallel. , A shows a form in which the same number of steel materials A and A are stacked on top.

If the total length of the regulation legs 20 constituting the suspension device is set to be long, it is possible to suspend the steel materials A, A having three or more stages stacked together.

[IV] Other Embodiments Other embodiments will be described below. In the description, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

(1) Other forms of the latching part FIG. 9 shows another form of the latching part 30.
In this example, a pair of movable claw plates 34 and 34 are disposed on both sides of the fixed claw plate 33 of the latching portion 30, and between the front end portions of the first claw portions 34 a constituting the movable claw plates 34 and 34, The connecting plates 39a and 39b are horizontally mounted between the tip portions of the two claw portions 34b to reinforce the latching portion 30.

The connecting plate 39a laid horizontally between the front ends of the first claw portions 34a may not only bend the plate body outwardly as shown in the figure, but may be a flat plate, and the shape is not particularly limited. .
The connecting plate 39 a has a dimensional relationship that does not interfere with the tip of the fixed claw plate 33 when it rotates about the support shaft 35.

  In this example, the adjustment bolt 36 is provided on the connecting plate 39b laid horizontally between the tips of the second claw portions 34b. However, the adjusting bolt 36 is omitted, and the outer surface of the connecting plate 39b is made of a steel web. You may make it contact | abut directly on a side surface.

In general, many bolt holes are opened in advance in the flange of the steel material, and when the movable claw plate 34 shown in FIG. 4 is in a single form, the tip of the first claw portion 34a is There is a risk of entering the bolt hole.
If the tip of the first claw portion 34a of the movable claw plates 34, 34 is covered with the connecting plate 39a as in this example, the first time when the movable claw plates 34, 34 come into contact with the upper flange of the steel material. It is possible to reliably prevent the claw portion 34a from entering the bolt hole.
Furthermore, in this example in which the latching portion 30 is reinforced, it is suitable for lifting a three-piece or more steel material A as shown in FIG. 8 or for lifting a long steel material A.

(2) Reinforcing structure of regulating leg FIG. 10 shows another embodiment in which reinforcing members 21 and 22 are provided between the regulating legs 20 and 20 adjacent to each other for reinforcement.
In this example, a configuration is shown in which a reinforcing member 21 is horizontally mounted between the lower portions of the adjacent regulation legs 20, 20, and a reinforcing member 22 is disposed vertically between the reinforcing member 21 and the upper connecting member 11. The installation direction and the number of installations of the reinforcing material are not limited to this, and the number of reinforcing materials may be two or more, and the arranging direction of the reinforcing material may be oblique. A known reinforcing structure can be applied.
In the present example in which the adjacent regulation legs 20 and 20 are reinforced, when the steel materials A and A are lifted, it is possible to suppress the expansion (outward opening) of the lower ends of the regulation legs 20 facing each other.

(3) Steel material fall prevention means The suspension device according to the present invention utilizes the weight of the steel materials A and A for lifting the steel materials A and A arranged in parallel. There is a possibility that the steel material A will fall in contact with the like.

10 and 11 show a suspension device provided with means for preventing the steel material A from falling.
The fall prevention means for the steel material A is composed of a safety band 25 such as a chain, a rope, or a net, and both lower ends of the safety band 25 spanned below the steel materials A and A after the earthing are provided in each lower reinforcing material 21. It is connected to the hook 23.

The safety belt 25 is disposed and attached to the suspension device in advance or is separated from the suspension device. In the former case, the safety belt 25 may be disposed so as not to interfere with the hanging operation.
Moreover, although the form which connected the safety belt | band | zone 25 to the hook 23 using the shackle as the connection tool 24 is shown in this example, a well-known connection means is applicable.

  In this example in which the suspension device is provided with means for preventing the fall of the steel material A, the fall prevention means for the steel material A can prevent the fall of the steel material A even if it is subjected to an earthquake or strong wind during the transfer operation. Safety is greatly improved.

A ... Steel A ₁ ... Steel flange A ₂ ... Steel web B ... Ground 10 ... Horizontal frame 11 ... Connecting material 20 ...・ Regulatory legs 21, 22 ・ ・ ・ Reinforcing material 25 ・ ・ ・ Safety belt 30 ・ ・ ・ Hanging portion 31 ・ ・ ・ Rotating body 32 ・ ・ ・ Hangling shaft 33 ・ ・ ・ Fixing claw plate 33 a ··· First abutting portion 34 ··· movable claw plate 34a · · · first claw portion 34b of movable claw plate · · · second claw portion 34c of movable claw plate · · · second abutting portion 35 · · ... Spindle 36 ... Adjustment bolt 37 ... Return spring 40 ... Rotating shaft 41 ... Drive cam 42 ... Handle 43 ... Drive cam 44 ... ·rod

Claims (3)

A steel device for lifting a plurality of steel materials arranged in parallel,
A horizontal frame connectable with a hanging rope;
A plurality of regulating legs depending on the horizontal frame with an interval across both sides of the plurality of steel materials;
A plurality of latching portions that are rotatably provided at the lower portions of the respective regulation legs, and that can come into contact with the lower surface of the outer upper flange and the side surface of the web of the plurality of steel materials arranged in parallel;
A rotation operation mechanism for performing a rotation operation of a plurality of latching portions,
A steel material accommodating space is formed between the plurality of regulating legs,
The turning operation mechanism can be switched by turning the latching portion horizontally between the latching release position and the latching position with the steel material,
The latching part is a columnar rotating body provided rotatably at the lower part of the regulating leg,
A suspension shaft that is inserted through the regulation leg and has a lower part connected to the rotating body,
A fixed claw plate protruding laterally from the outer peripheral surface of the rotating body,
A fixed claw plate and a superposed claw plate, and a movable claw plate pivotably supported by the fixed claw plate,
The movable claw plate comprises a first claw portion on the upper side and a second claw portion on the lower side,
The confluence portion of both the claw portions is pivotally supported by the fixed claw plate in the vertical direction via the support shaft,
The second claw portion of the movable claw plate is movable in the direction away from the side surface of the steel web so that the tip of the first claw portion protrudes upward from the fixed claw plate when the movable claw plate is unloaded. Always apply a spring force to the nail plate,
The first claw portion and the second claw portion constituting the movable claw plate are supported when the distal end portion of the first claw portion is in contact with the lower surface of the steel flange located on the outermost side together with the fixed claw plate. The tip of the second claw portion rotated to the horizontal position around the center is related to contact with the side surface of the steel web located on the outermost side ,
Steel suspension device. In Claim 1 , the rotation operation mechanism of the latching portion includes a rotation shaft pivotally supported on a horizontal frame, a drive cam provided on the rotation shaft, an operation handle provided on an end portion of the rotation shaft, A steel suspension device, comprising: a driven cam provided on an upper portion of each suspension shaft; and a rod connected to each of the driven cams located on the left and right sides with the drive cam as a center. 2. The steel material suspension device according to claim 1 , wherein an adjustment bolt is screwed onto a tip of the second claw portion .

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