JPH06271273A - Lifting jig for long-sized material - Google Patents

Abstract

PURPOSE:To facilitated the handling of a plurality of long-sized materials of different length by coupling a movable member to both ends of a fixed member having a longitudinal guide cylinder in such a way as free to move telescopically, and fitting at least the end of the movable member with a jointing mechanism capable of free engagement with and disengagement from a holding frame for the long-sized material. CONSTITUTION:This lifting jig has a fixed member 10 consisting of a pair of longitudinal guide cylinders 11 jointed to each other in parallel via jointing frames 12 and so forth. The upper sections of the guide cylinders 11 are provided with hydraulic units 13, and hooks are fitted to the upper surface of the cylinders 11 at both ends. Jointing mechanisms 50 are fitted to the jointing frames 12 at positions other than both ends of the guide cylinders 11. The mechanisms 50 are driven with built-in rotary actuators, and have rotary claws 53 engaged with and disengaged from coupling holes F2 at the upper ends of the legs F1 of holding frames F. Also, movable members 20, 30 and 40 are coupled to both ends of the fixed member 10 in such a way as freely inserted and pulled out, and similar jointing mechanisms 50 are provided at jointing frames 22 and 42 at the ends of the cylinders 21 and 41 of respective movable members 20 and 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can improve the safety of workers and the efficiency of work in the work of loading and unloading long and heavy materials such as large shaped steel. The present invention relates to a jig for lifting a bar.

[0002]

2. Description of the Related Art Large shaped steel and bar steel have a unit length of 10
Since the length is several meters, the unit weight often exceeds 10 tons.

Therefore, when carrying out a cargo handling operation for such a heavy long material, first, wire ropes are hung on both ends of the long material to be cargo-loaded.
Long materials must be lifted and moved by operating the two gantry cranes in synchronism with each other corresponding to different gantry cranes. In this way, associating different gantry cranes with both ends of the cargo handling target is effective even when the length of the cargo handling target is not constant.
This is because it can be easily dealt with by adjusting the distance between the gantry cranes.

[0004]

According to the prior art, the wire rope hooking on the object to be handled must be carried out by a trained slinging operator, and the operation of the gantry crane should be carried out by a trained professional operator. Since it has to be carried out carefully, the problem that it is difficult to secure work personnel was unavoidable. Further, since the slinging work is a manual work, it takes time and is extremely dangerous work.

In view of the problems of the prior art, an object of the present invention is to combine a fixed member and a movable member slidably inserted into the fixed member,
It is an object of the present invention to provide a jig for lifting a long material that can safely and efficiently load a large-length long material of an arbitrary length.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the structure of the present invention includes a fixed member having a lifting hook, a movable member slidably inserted into both ends of the fixed member, and a movable member. It is provided with a drive mechanism for expanding and contracting, and the gist of the invention is to dispose a connecting mechanism capable of being automatically connected to a holding frame holding a long material at least at the tip of the movable member.

The fixed member connects the pair of guide cylinders in parallel via the connecting frame, and the movable member connects via the connecting frame.
A pair of cylinders inserted into the guide cylinder can be connected in parallel.

Further, the movable member can be provided in a plurality of stages.

Furthermore, the guide cylinder and the cylinder can each be formed in a truss structure.

[0010]

According to the structure of the invention, the fixing member is
Since the movable member is provided at both ends, the entire length including the fixed member and the movable member is reduced by expanding and contracting the movable member.
It can be arbitrarily changed according to the length of the target long material. Further, the fixing member can be entirely lifted via the lifting hook. Therefore, if you suspend the holding frame that holds the long material through the connecting mechanism, the long material will
Regardless of its length, it is possible to support both ends and to hang it stably.

When a pair of guide cylinders are connected to form a fixed member, and a cylinder inserted into the guide cylinder is connected to form a movable member, both the fixed member and the movable member are different from each other. Since the structural member is not required, the whole structure can be the simplest.

If the movable members are provided in a plurality of stages, the whole can be telescopically expanded and contracted, so that the overall expansion / contraction ratio can be made extremely large.

If the guide cylinder and the cylinder are formed in a truss structure, the respective weights can be greatly reduced and the total weight can be halved.

[0014]

Embodiments Embodiments will be described below with reference to the drawings.

A jig for lifting a long material is a fixing member 10.
And the movable members 20, 20, 30, 30, 40, 40 slidably inserted into both ends of the fixed member 10 are the main members (FIG. 1).

The fixing member 10 is formed by connecting a pair of vertically elongated guide cylinders 11 and 11 in parallel via connecting frames 12 and 12 (FIGS. 1 and 2). However, the connecting frames 12, 12 ...
In addition to the central portion of the guide cylinders 11, 11, they are symmetrically distributed and arranged at two places at both ends. In addition, the guide tubes 11, 1
Hydraulic units 13, 13 are installed on the upper surface of 1, and lifting hooks 14, 14 are attached to the upper surfaces of both ends of the guide cylinders 11, 11, respectively.
An annular ring 14b is attached to the pair of lifting hooks 14, 14 via short chains 14a, 14a.

A connecting mechanism 50 is attached to each of the connecting frames 12, 12 ...

The connecting mechanism 50 includes a rotary actuator 51 installed in the center of the upper part of the connecting frame 12, rotating shafts 52, 52 arranged on both side surfaces of the connecting frame 12, and rotating shafts 52, 5.
It is provided with rotating claws 53, 53 attached to the lower end of 2. An auxiliary shaft 54 is pivotally supported on the upper surface of the coupling frame 12 via a bearing (not shown). A bevel gear 51a is fixed to an output shaft of the rotary actuator 51, and the bevel gear 51a meshes with a bevel gear 54a in an intermediate portion of the auxiliary shaft 54. Further, other bevel gears 54b and 54b are fixed to both ends of the auxiliary shaft 54, and the bevel gears 54b and 54b mesh with the bevel gears 52a and 52a at the upper ends of the rotary shafts 52 and 52, respectively.

Each rotating shaft 52 vertically penetrates a bearing cylinder 52b fixed to the side surface of the connecting frame 12. The lower surface of the rotary claw 53 fixed to the lower end of the rotary shaft 52 is formed into a chevron shape and the upper surface is formed into an oval flat surface (FIGS. 3 and 4). On the lower surface of the bearing cylinder 52b, the small cylinder 5 having the same oval cross section as the rotary claw 53 is formed so as to surround the rotary shaft 52.
2c is attached, and the long side direction of the small cylinder 52c is the same direction as the guide cylinders 11, 11.

Therefore, the coupling mechanism 50 uses the rotary actuator 51 as a drive source and simultaneously rotates the rotary shafts 52, 52 by 90 degrees to move the rotary claws 53, 53 in the same direction as the small cylinders 52c, 52c, that is, the guides. Tubes 11, 1
The direction can be changed to the same direction as 1 (solid line in FIGS. 3 and 4) and the direction perpendicular thereto (two-dot chain line in FIG. 4).

Guide plates 52d and 52d that expand downward are attached to the lower part of the bearing cylinder 52b, and reinforcing ribs 52d1 are attached to the upper surface of each guide plate 52d. However, the guide plates 52d and 52d are the same as the connecting frame 1
In principle, it is provided in two directions of the inside of 2 and one side of the guide cylinders 11 and 11 in the longitudinal direction of the guide cylinders 11, 11. It is attached in three directions including both sides of (Fig. 5
Right edge).

The movable members 20 and 20 are connected in parallel to each other via a connecting frame 22 with tubular bodies 21 and 21 slidably inserted into the guide tubes 11 and 11 of the fixed member 10 (see FIG. 1, FIG. 2). The connecting frame 22 includes the tubular body 21,
It is installed at the tip of 21 and the connecting frame 22 is provided with a connecting mechanism 50 having the same structure as that of the connecting frames 12, 12.

The movable members 30 and 30 respectively have cylindrical bodies 31 and 31 slidably inserted into the cylindrical bodies 21 and 21 of the movable member 20, and the cylindrical bodies 31 and 31 have a connecting frame 32. Are connected in parallel with each other. In addition, in the connection frame 32,
The connecting mechanism 50 is not attached.

The movable members 40, 40 have cylindrical bodies 41, 41 slidably inserted into the cylindrical bodies 31, 31 of the movable member 30, respectively. The cylindrical bodies 41, 41 are cylindrical bodies 41, 41, respectively. Four
They are connected in parallel via a connecting frame 42 at the tip of the first unit.
A connecting mechanism 50 is attached to the connecting frame 42.

A drive mechanism 60 is arranged between the guide cylinders 11 of the fixing member 10 (FIGS. 5 and 2). However, two sets of the drive mechanism 60 are provided on the left and right sides of the fixed member 10 so as to face each other, and FIG. 5 illustrates only one of them.

The drive mechanism 60 is mainly composed of a single-stroke cylinder 61 and a double-stroke cylinder 62, and the base of the cylinder 61 is a guide cylinder 11 or 1.
It is connected to a base bracket 61a bridging the inner side surface of 1. The rod 61r of the cylinder 61 is connected to the bracket 61c via the auxiliary bracket 61b. However, it is assumed that the bracket 61c bridges the inner side surfaces of the tubular bodies 21, 21 at the tip of the movable member 20.

Behind the bracket 61c is a girder 63a.
Is connected, and another bracket 6 is attached to the rear end of the girder 63a.
3b are connected. Both ends of the bracket 63b have rails 63c, 6 attached to the inner side surfaces of the guide tubes 11, 11.
It is movably supported via 3c.

The base of the cylinder 62 is connected to the bracket 63b via base brackets 62a, 62a. Also, the first rod 62r1 of the cylinder 62 is
The second rod 62r2 of the cylinder 62 is connected to the bracket 62c via the auxiliary bracket 62b.
It is connected to the bracket 62e via the auxiliary bracket 62d. However, the brackets 62c and 62e are attached to the cylindrical body 3 at the tip of the movable members 30 and 40 respectively.
1, 31 and the inner surfaces of the cylindrical bodies 41, 41 are bridged.

Therefore, if the rod 61r of the cylinder 61 is extended (FIG. 6 (A)), the cylinder 61 can drive the cylinders 21 and 21 of the movable member 20 via the auxiliary bracket 61b and the bracket 61c. Therefore, the movable member 20 can advance relative to the fixed member 10 by an amount equivalent to the stroke of the cylinder 61. At this time, the bracket 63b connecting the bases of the cylinders 62
Is connected to the bracket 61c via the girder member 63a, so that the rails 63c, 6 together with the bracket 61c.
3c, so that the cylinder 62 can be advanced in the shortened state.

Subsequently, the first rod 6 of the cylinder 62 is
When 2r1 is extended ((B) in the figure), the cylinder 62 becomes
The cylinders 31 and 31 of the movable member 30 can be driven via the auxiliary bracket 62b and the bracket 62c, and the movable member 30 can move forward with respect to the movable member 20 by an amount equivalent to the stroke of the cylinder 62. Further, if the second rod 62r2 of the cylinder 62 is further extended ((C) in the same figure), the cylinder 62 becomes the auxiliary bracket 6
2d, the cylindrical body 4 of the movable member 40 via the bracket 62e
It is possible to drive the movable members 40 by driving the motors 1 and 41.

That is, the cylinders 61, 62 can move the movable members 20, 30, 40 forward with respect to the fixed member 10 in order and extend the entire length thereof in a telescopic manner. Further, by shortening the cylinders 61, 62 in the reverse order, the movable members 40, 30, 20 can be housed in the fixed member 10 in order, and the entire length thereof can be shortened to the minimum. The cylinders 61 and 62 correspond to one of the hydraulic units 13 and 13, and the rods 61r, 62r1 and 62r2 of the cylinders 61 and 62 can be arbitrarily expanded and contracted within their respective strokes through a control device (not shown). And

Now, the jig for hoisting a long material can be hoisted easily by one crane by using an appropriate auxiliary tool via the hoisting hooks 14, 14, .... However, at this time, the movable members 20, 20, 3
Regardless of FIG. 1, 0, 30, 40, and 40 are assumed to extend and contract to both sides of the fixed member 10 by equal lengths via the built-in drive mechanisms 60 and 60 to maintain the overall balance.

On the other hand, the long members H, H ... Of H-section steel to be handled are handled through the U-shaped holding frames F, F (FIG. 1). That is, by supporting the both ends of the long members H, H ... With the holding frames F, F, the long members H, H. However, the holding frames F, F may use three or more sets when the lengths of the long members H, H ... Are long.

Each holding frame F has leg portions F1 and F1 facing upward, and an oval locking hole F2 is formed on the upper surface of each leg portion F1 (FIG. 3). However, the distance between the legs F1 and F1 is set to match the distance between the rotary claws 53 and 53 of the connecting mechanism 50, and the shapes and sizes of the locking holes F2 and F2 are matched to those of the rotary claws 53 and 53. I shall. Further, the locking holes F2, F2 are oriented in the same direction as the elongated members H, H ...

Therefore, the jig for lifting a long material is, for example, a long material H, H ... In such a manner that the connecting frames 12, 12 at both ends of the fixing member 10 correspond to the holding frames F, F. In parallel, by hanging from above the long materials H, H ...
The rotating claws 53, 53 ...
... (Fig. 3), each rotary claw 53,
Finally, it can be inserted into the corresponding locking hole F2 from above. At this time, the guide plates 52d, 52d arranged around each rotary claw 53 abut the outer circumference of the upper end of the leg F1 to position the rotary claw 53 appropriately.

When the rotary claws 53 are inserted into the corresponding locking holes F2, the left and right rotary claws 53, 53 are rotated 90 degrees via the rotary actuator 51 of each coupling mechanism 50. As a result, each of the rotary claws 53 engages with the top surface F2a around the locking hole F2 from below, and the connecting frame 12 and the holding frame F can be automatically connected. The long materials H, H ... Can be hung from the two points by hanging up (FIG. 7 (A)). However, at this time, the movable members 20, 20, 30, 30, 40, 40
Are stored in the fixing member 10 to keep the total length to a minimum. In addition, by moving the long materials H, H ... to a predetermined position,
When the connection mechanism 50 is hung down, the connection mechanism 50 has the rotating claws 53, 5
By rotating 90 again 90 degrees, it can be separated from the holding frame F. Each rotary claw 53 has a locking hole F in its direction.
This is because it can be removed from the locking hole F2 by adjusting to 2.

When the long members H, H ... Are long and are suspended at three points (FIG. 7 (B)), the connecting mechanism 50 attached to the connecting frame 12 at the center of the fixed member 10 and the movable member. 20, 2
A connecting mechanism 50 attached to the connecting frames 22 and 22 at the tip of 0,
The rotary claws 53, 53 of the respective connecting mechanisms 50 may be automatically connected to the three sets of holding frames F, F. However, the movable members 20, 20 at this time are symmetrically extended by a predetermined length via the drive mechanisms 60, 60,
The connecting mechanisms 50, 50 attached to the connecting frames 22, 22 are made to correspond to the holding frames F, F at both ends of the long members H, H ...

The long members H, H ... By using the connecting mechanisms 50 attached to the connecting frames 12, 12 at both ends of the fixed member 10 and the connecting frames 42, 42 at the tips of the movable members 40, 40. ((C) in the figure) It is possible to suspend at four points via four sets of holding frames F, F .... However, in this case, the movable members 20, 20, 30, 30 are arranged so that the connecting mechanisms 50, 50 at the tips of the movable members 40, 40 correspond to the holding frames F, F at both ends of the long members H, H ... , Shall be symmetrically extended by a predetermined length.

The long members H, H ... Can also be hung at five points ((D) in the same figure). At this time, connecting mechanisms 50, 50 ... Attached to the connecting frame 12 at the central portion of the fixed member 10 and the connecting frames 22, 22, 42, 42 at the tips of the movable members 20, 20, 40, 40 are used. And the movable members 20, 2
It is assumed that 0, 30, 30, 40, and 40 are symmetrically extended by a predetermined length.

[0040]

[Other Embodiments] Guide cylinders 11, 11 of the fixed member 10 and cylinders 21, 21, 31, 3 of the movable members 20, 30, 40.
Each of 1, 41 and 41 can be formed in a truss structure (FIGS. 8 and 9).

For example, the guide tube 11 is formed by joining rectangular pipe members 11a1 and 11a1 having a rectangular cross section at right angles to form a beam member 11a and arranging the beam members 11 at four corners.
a, 11a ... are column members 11b and 11b at both ends, and a horizontal member 11
Girder material 1 after being assembled into a rectangular section through c and 11c
1a and 11a are connected via diagonal reinforcing members 11d, 11d ... Note that each of the pillar members 11b and the transverse members 11c also uses square pipe members, each reinforcing member 11d uses round pipe members, and both ends thereof have girder members 11a,
It shall be welded to 11a.

The respective cylinders 21, 31, 41 can be similarly constructed. However, in FIG. 9, the constituent members of the respective cylinders 21, 31, 41 are coded by the same code system as that of the guide cylinder 11. Further, in the tubular body 41, since the width thereof is small, the upper and lower horizontal members 41c, 41c are omitted.

The cylindrical body 21 is different from the guide cylinder 11 in that
The girders 11a, 11a, 21a, 21a are slid through liners 11e, 11e, 21e, 21e fixed to the 21a. Further, the tubular body 31 is the tubular body 21.
In contrast, the respective girder materials 21a, 21a, 31a, 31
It is adapted to slide via liners 21e, 21e, 31e, 31e fixed to a, and the same applies to the tubular body 41 with respect to the tubular body 31. However, the liners 11e, 21e ...
Are vertically symmetrically arranged with respect to the lower and upper girders 11a, 11a, 21a, 21a ... Of the guide cylinder 11, the cylindrical bodies 21, 31, ..., FIG. 9 shows only the lower part thereof. ing.

The guide cylinder 11 and the cylinder 2 having such a truss structure
The weights of 1, 31, ... Can be halved as compared with the case where the housing structure is used.

In the above description, each connecting mechanism 50 mounted on the fixed member 10 and the movable members 20, 20, 40, 40.
Is sufficient if the rotary shafts 52, 52 and the rotary claws 53, 53 can be rotationally driven 90 degrees forward and backward. Therefore, instead of the rotary actuator 51, the drive source is a combination of a cylinder and a link mechanism, and a cylinder. Any form such as a combination with a rack and pinion mechanism may be used.

The movable members 20, 30, 40 can be expanded or contracted in one step or two steps by removing a part of them, and by adding them, they can be formed in multiple steps of four steps or more. It is also possible. However, in any case, it is preferable that the connecting mechanism 50 is arranged at least at the most distal ends of the movable members on both sides.

It should be noted that the long members H, H ... Can be stacked in multiple stages via the holding frames F, F. At this time, in order to prevent the load collapse, an appropriate load collapse prevention device is used. It is preferable to use them together. The simplest such a load collapse prevention device is one in which each leg portion F1 of the holding frame F incorporates an automatic coupling mechanism substantially similar to the rotary shaft 52 and the rotary claw 53 of the coupling mechanism 50. However, the rotary shaft of this one rotates by engaging with the rotary claw 53 of the coupling mechanism 50 or the rotary claw of the upper load collapse prevention device, and the rotary claw automatically connects to the lower load collapse prevention device. I shall.

[0048]

As described above, according to the present invention, the fixed member and the movable members slidably inserted into both ends of the fixed member are provided, and the coupling mechanism is arranged at least at the most distal end of the movable member. By installing the movable member, the entire length of the movable member can be arbitrarily expanded / contracted by expanding / contracting the movable member, and the connecting mechanism can automatically connect to the holding frame holding the long material. Therefore, even a large-length long material does not require any complicated slinging work, and has an excellent effect that it can be handled safely and extremely efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration

[Fig. 2] Cross-sectional view of essential parts

FIG. 3 is a perspective view of a main part

FIG. 4 is a cross-sectional view taken along line XX of FIG.

FIG. 5 is a vertical cross-sectional view of the main part

FIG. 6 is an operation explanatory diagram (1)

[Fig. 7] Operation explanatory diagram (2)

FIG. 8 is a perspective view of an essential part showing another embodiment.

FIG. 9 is a longitudinal sectional view of a main part showing another embodiment.

[Explanation of symbols]

 H ... Long material F ... Holding frame 10 ... Fixed member 11 ... Guide tube 12 ... Connection frame 14 ... Lifting hooks 20, 30, 40 ... Movable member 21, 31, 41 ... Cylindrical body 22, 32, 42 ... Connection frame 50 … Coupling mechanism 60… Drive mechanism

Claims (4)

[Claims] 1. A fixed member having a lifting hook, a movable member slidably inserted into both ends of the fixed member, and a drive mechanism for expanding and contracting the movable member, and at least the movable member. A jig for hoisting long materials, which is characterized by arranging a connecting mechanism that can automatically connect to a holding frame that holds the long material at the forefront. 2. The fixed member connects a pair of guide cylinders in parallel via a connection frame, and the movable member connects a pair of cylinder bodies inserted in the guide cylinder in parallel via a connection frame. The jig for lifting a long material according to claim 1, characterized in that. 3. The jig for lifting a long material according to claim 2, wherein the movable member is provided in a plurality of stages. 4. The jig for lifting a long material according to claim 1, wherein the guide cylinder and the cylinder are each formed in a truss structure.