JP2902589B2 - Hanging clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension clamp for suspending and transporting a large girder or a shaped steel, which is a construction material for a bridge or the like.

[0002]

2. Description of the Related Art Conventionally, large-sized girder members, shaped steels, and the like, which are used as construction materials for bridges and the like, are generally suspended and transported by cranes.

In such a transfer, for example, when the work is an H-section steel, generally, as shown in FIG.
At two locations in the longitudinal direction of the work 90, hooks 94 are respectively attached to left and right sides of a flange 92 of the work 90, and wires 96 are attached over a pair of hooks 94. The work 90 is lifted by a crane via these wires 96. It is transported.

[0004]

However, in the case of a large section steel, the dimension a between the flanges of the work 90 is large, and it is necessary for an operator to climb on the flange 92 of the work 90 and perform the work of attaching and detaching the hook 94. is there. Therefore, the work of attaching and detaching the hook 94 is complicated and time-consuming. Especially,
When the lifting position is to be corrected, the workability is extremely poor because the hooks 94 must be individually re-attached. Further, when the size of the work 90 is increased, the work of attaching and detaching the hook 94 becomes a work at a high place, and thus there is a problem that the work involves danger.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a hanging clamp capable of more efficiently and safely transferring a large work such as a bridge construction material. And

[0006]

SUMMARY OF THE INVENTION The present invention relates to a suspension clamp for supporting a workpiece so that it can be lifted in a gripped state. The first clamp is connected to a crane or the like, and is provided on the first frame. A chuck means, the chuck means comprising: a second frame disposed below the first frame; a pair of arm members provided on the second frame and movable in a horizontal direction; A vertically extendable link mechanism connecting the first frame and each of the arm members, a hook mechanism provided on each arm member and provided opposite to and below the second frame; A lock member provided on the second frame and capable of engaging and disengaging with respect to the arm member, wherein the link mechanism is configured to contact and separate each arm member according to its expansion and contraction, The arm member has a shaft that is an engaged portion of the lock member, and the lock member is swingably supported by a second frame via a support shaft, and is higher than the support shaft. A guide portion on the distal end side, which comes into contact with the shaft member in accordance with the separating operation of the arm member and swings and displaces the lock member upward, and the shaft member disposed between the guide portion and the support shaft; When the two arm members reach a predetermined separated position in the separating operation of the arm members, the shaft member intervenes in the concave portions and the arm member is engaged with the arm members, and the arm members move. It is configured to block.

According to this hanging clamp, after the clamp is placed on the work in a state where each arm member is held at the separated position by the lock member, the lock by the lock member is released, and the clamp is released by the crane or the like. By being lifted, the respective arm members are brought closer together with the elongation of the link mechanism due to the rise of the first frame, and the work is lifted while being gripped by the respective arm members. After the work is conveyed, the arm members are separated from each other as the link mechanism is reduced due to the lowering of the first frame, held at a predetermined separation position by the lock member, and then the clamp is lifted to clamp the work from the work. Is removed. Therefore, in the work transfer work, the work of the worker attaching and detaching the hook to and from the work is not required, and the workability of the work transfer work is improved.

In particular, in the above configuration, the first frame may be formed in a rod shape extending in a uniaxial direction, and a plurality of chuck means may be provided at predetermined intervals in the longitudinal direction of the first frame. In addition, it is possible to convey an elongated shaped steel or the like with good balance.

The hook portions of the arm members are offset in a direction orthogonal to the direction of contact and separation of the arm members on a horizontal plane, and are provided so as to overlap with each other in the offset direction in a predetermined approach state of the arm members. If
The work can be held and transported while being held by the arm member.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 schematically show an example of a suspension clamp according to the present invention. As shown in these figures, the hanging clamp 10 is moved in the front-rear direction (the left-right direction in FIG. 1).
, And a pair of front and rear chuck devices 30 for supporting a work below the first frame 12.

The first frame 12 is composed of a pair of channel steels 12a on the left and right (in the direction perpendicular to the front-rear direction and on the horizontal plane). Each of the channel steels 12a is connected at several points in the longitudinal direction via a connecting member, whereby a plurality of vertical through holes 14 are formed in the longitudinal direction of the first frame 12. Then, as described later, the second frame 32
Of the vertical axis intervenes in the through hole 14.

A pair of front and rear engaging portions 16 are provided on the upper portion of the first frame 12, and a wire 20 is attached to these engaging portions 16 via a shackle 18. Although not shown, the hook at the tip of the wire led out from the crane is locked to the wire 20 so that the hanging clamp 10 can be lifted by the crane.

The chuck device 30 includes a second frame 3
2, a pair of left and right arm members 50 movably provided on the second frame 32, and a mechanism for moving the arm members 50.

The second frame 32 has a configuration in which a pair of front and rear plates 33 and 34 are connected in a front and rear direction at a predetermined interval. Each of the plates 33 and 34 is formed in an inverted T-shape having a horizontal axis portion extending in the left-right direction and a vertical axis portion extending upward from an intermediate portion thereof. A pair of left and right concave portions 37 extending from the vicinity of the left and right end portions to the intermediate portion are formed in the front and rear outer portions of the horizontal shaft portion, and a horizontal hole 36 is formed at the bottom of the concave portion 37. The shaft portion has a vertical hole 38 extending vertically.

Each of the arm members 50 is provided so as to be movable in the left-right direction at the horizontal axis of the second frame 32 configured as described above. That is, each arm member 50 is attached to both ends of each support shaft 46 on the front and rear outer sides of the second frame 32, and the support shaft 46 inserted through the horizontal hole 36 corresponding to the front and rear of each of the plates 33 and 34. And a pair of front and rear plate-shaped unit arms 50a which are connected to each other via a pair 53. Thereby, each arm member 50 can move in the left-right direction with respect to the second frame 32 within the range of the horizontal hole 36.

Each unit arm 50a protrudes below the second frame 32 as shown in FIG. 1, and has a hook 52 integrally formed at the lower end thereof. Are formed so as to face each other.

As shown in FIG. 3, each arm member 50a has a rectangular projection 51 at a portion connected to the support shaft 46.
Are formed, and the projections 51 are provided on the respective plates 33 and 3.
4 is fitted in the recess 37. As a result, the rotation of each arm member 50 around the support shaft 46 is prevented, and the left and right arm members 50 can move while holding the hook portions 52 facing each other.

Each of the arm members 50 is connected to a pantograph mechanism as shown in FIGS. This pantograph mechanism includes a pair of a front link mechanism 40A and a rear link mechanism 40B.

As shown in FIG. 1, the front link mechanism 40A comprises a pair of left and right short links 42 and a long link 44 connected thereto. The arm member 50 is connected to the lower end of each long link 44. ing. More specifically, the base end (upper end) of each short link 42 is pivotally supported by a flange portion 22 formed on the lower surface of the first frame 12 via a support shaft 41, and is supported by the distal end (lower end) of the short link 42. The base end of the long link 44 is connected via the shaft 43. The long links 44 are crossed to each other at the crossing points, and the two long links 44 are connected to each other via a support shaft 45, and the lower end of each long link 44 is connected to each plate 33, 34, it is rotatably connected to the support shaft 46 of each arm member 50. The basic structure of the rear link mechanism 40B is the same as that of the front link mechanism 40A, and a description thereof will be omitted.

In the two link mechanisms 40A and 40B, the support shaft 4 for connecting the short link 42 and the long link 44 is provided.
As shown in FIG. 2, a support shaft 45 for connecting the long link 44 and the long link 44 to each other is used in common between both link mechanisms, and both front and rear ends of the support shaft 45 are connected to the second frame 32. The link mechanisms 40A and 40B are inserted into the vertical holes 38 formed in the plates 33 and 34 so that the link mechanisms 40A and 40B expand and contract integrally along the vertical holes 38 in the vertical direction.

With the pantograph mechanism constructed as described above, the left and right arm members 50 move along the horizontal hole 36 of the second frame 32 in a direction approaching or separating from each other as the pantograph mechanism expands and contracts. At the same time, the movement distance of each arm member 50 at this time is equal to the left and right center position of the second frame 32.

In the chuck device 30, the second
A lock arm 54 for preventing the movement of the arm member 50 is provided at an end portion (a right end portion in FIG. 1) of the horizontal axis portion of the frame 32. Lock arm 54
Is swingably supported on a front portion of the second frame 32 via a shaft body 56, and more specifically, abuts against a support piece 62 protruding from the second frame 32 as shown by a solid line in FIG. The supporting piece 6 sandwiching the locking position and the locking arm 54
2 can swing over a lock release position (a position indicated by a dashed line in FIG. 2) that comes into contact with a regulating shaft 58 protruding above the second shaft 2. In a normal state where no external force acts, the lock position is maintained at the lock position by its own weight.

The lock arm 54 is a plate-shaped member.
On the left side of the shaft 56, there is formed a guide portion 60 which is tapered downward toward the right and a concave portion 58 which is recessed upward continuously from the guide portion 60, while a right end portion is formed. Has a rope 66 for swinging the lock arm 54.
Is attached and drooped.

When each arm member 50 is moved toward the end of the second frame 32, the support shaft 46 of the right arm member 50 is moved to the guide portion 60 of the lock arm 54.
When the arm member 50 is moved up to a position where the concave portion 58 of the lock arm 54 and the support shaft 46 correspond to each other, the lock arm 54 is moved upward.
Is returned to the lock position by its own weight, and the end of the support shaft 46 projecting forward of the unit arm 50a is inserted into the recess 58 of the lock arm 54. As a result, the lock arm 54 engages with the support shaft 46 and the second frame 3
When the lock arm 54 is swung to the unlocked position via the rope 66 while the movement of the arm member 50 with respect to
Is disengaged and the movement of the arm member 50 is allowed.

Although the structure of one chuck device 30 (right side in FIG. 2) has been described above, the other chuck device 30 has the same structure.

Next, the work transfer procedure using the hanging clamp 10 configured as described above will be described.

First, in the hanging clamp 10, each arm member 50 is moved to the left and right sides of the second frame 32 as shown in FIG.
It is set to a state where movement of 0 is blocked (hereinafter referred to as a locked state). Then, in this state, the lifting clamp 10 is lifted by a crane and moved upward of the work.

For example, when an H-section steel is lifted and conveyed as a work, as shown in FIG.
The suspension clamp 10 is arranged above the H-shaped steel 70 such that the direction of the first frame 12 is substantially parallel to the longitudinal direction of the H-shaped steel 70. Then, the hanging clamps 10 are lowered from this position, and the hanging clamps 10 are placed on the upper surfaces of the flanges 72 of the H-section steel 70 via the lower surfaces of the second frames 32 of the chuck devices 30.

Then, after the lock arm 54 is swung to the unlock position to release the locked state of the suspension clamp 10, the lifting of the suspension clamp 10 by the crane is started. At this time, the H-shaped steel 70
By swinging the lock arm 54 from below, the locked state of the suspension clamp 10 can be easily released.

When the lifting is started, first, the first frame 12 is lifted, and accordingly, the pantograph mechanism is extended. Then, with the extension of the pantograph mechanism, each arm member 50 is moved in a direction approaching each other, and
It is brought into contact with both ends of the flange 72 of the section steel 70 (see FIG. 5). When the first frame 12 is further lifted, the hook portions 52 of the arm members 50 are automatically engaged with the flanges 72 of the H-shaped steel 70, and the H-shaped steel 70 is lifted integrally with the hanging clamp 10. become. When the H-shaped steel 70 is lifted in this way, the force due to the weight of the H-shaped steel 70 is converted into a force in a direction in which the two arm members 50 approach each other via the pantograph mechanism.
0 is firmly held between the arm members 50 and transported.

After the H-shaped steel 70 is moved to the target place, after the H-shaped steel 70 is mounted, the hanging clamp is used until the lower surface of the second frame 32 contacts the upper surface of the flange 72 of the H-shaped steel 70. 10 is lowered, and the wire of the crane is sent out from this state so that the pantograph mechanism is completely reduced. Thereby, each arm member 50 is moved to the left and right ends of the second frame 32,
The lock arm 54 is engaged with the support shaft 46 of the right arm member 50, and the suspension clamp 10 is set in the locked state.

After the hanging clamp 10 is set in the locked state, the lifting operation of the hanging clamp 10 and removal of the hanging clamp 10 from the H-shaped steel 70 completes the work of transporting the H-shaped steel 70. After the conveyance of the H-section steel 70 is completed,
Since the hanging clamp 10 is set in the locked state as described above, the hanging clamp 1 is continuously mounted on the next work side.
By moving 0, another work can be conveyed in the same manner as described above.

On the other hand, when the work is completed, the hanging clamp 10 is placed in the storage place while being set in the locked state. At this time, the through hole 14 is formed in the first frame 12 as described above, and in the locked state, the vertical axis portion of the second frame 32 can intervene in the through hole 14 as shown in FIG. It has become. Therefore, the hanging clamp 10 can be stored in a state where it is compactly reduced in the vertical direction.

As described above, the suspension clamp 10
According to the above, while the hanging clamp 10 is suspended by a crane and placed on a work, the lock arm 54 is swung through the rope 66 to release the locked state, and the work is carried out through the hanging clamp 10. Can be lifted and transported. Therefore, it is not necessary to attach a hook to the work prior to the transfer work as in the related art, and it is possible to improve workability when the work is suspended and transferred. In particular, in the conventional work, when the work becomes large, the workability is extremely poor because the worker needs to climb the work and walk while walking over a predetermined hook mounting portion, and the work may be extremely dangerous. However, if the work is conveyed using the above-described hanging clamp 10, even if the work becomes large, it is not necessary for the worker to walk around on the work and work, thereby solving the above-described problem. can do.

The suspension clamp 10 of the above embodiment
Is an example of the suspension clamp 10 according to the present invention, and a specific configuration thereof can be appropriately changed without departing from the gist of the present invention.

For example, the suspension clamp 10 of the above embodiment
In the above, the dimension (the dimension in the vertical direction) of the arm member 50 is set relatively short, but as shown in FIG. 6, the dimension of the arm member 50 may be set sufficiently long.
According to such a configuration, the work to be conveyed is a work having dimensions in the vertical direction, such as a work having a rectangular cross-section, and having no flange 72 like the H-section steel 70. Also, the hook portion 52 can be transported by engaging the lower surface of the work. Therefore, there is an advantage that it is possible to transport more types of works as compared with the hanging clamp 10 of the above embodiment.

Further, as shown in FIG.
0 of the unit arm 50a to the support shaft 46
4 and a lower portion thereof which is pivotally connected to the lower end thereof so as to be swingable in the left-right direction. Member 50
Hook portions 7 offset from each other in the front-rear direction
8 may be provided respectively. According to such a configuration, as shown in the figure, since the workpiece can be transported while being held by each arm member 50, there is no portion around which the hook portion is engaged such as a tubular material having a circular cross section. This is advantageous when conveying such a work. When the work is lifted by the hanging clamp, each of the collapsible portions 76 is held at a position opened to the left and right outer sides (a position shown by a dashed line in the same drawing), and each arm member 50 is moved closer to hold the work. Sandwich it from the left and right sides, and then
May be swung to the closed position (the position indicated by the solid line in the figure). Means for holding each of the retractable portions 76 in the open position or the closed position includes, for example, the fixing portion 7
4 and a collapsible portion 76 connected thereto are provided with common through holes, and a pin member is inserted into these through holes to hold the collapsible portion 76 at the above-described positions. can do.

Further, the suspension clamp 10 of the above embodiment
In the embodiment, two chuck devices 30 are provided in the longitudinal direction of the first frame 12, but the number of the chuck devices 30 is not limited to this example, and may be one or three or more. However, when transporting an elongated shaped steel or the like, it is desirable to provide at least two or more chuck devices 30 from the viewpoint of transporting the work in a well-balanced manner.

Further, in the hanging clamp 10 of the above embodiment, the lock arm 54 is configured to directly prevent the movement of the arm member 50. For example, the movement of the long link 44 with respect to the second frame 32 is restricted. Thus, the movement of the arm member 50 may be prevented.

Further, the suspension clamp 10 of the above embodiment
In the above, the rope 66 is pulled to swing the lock arm 54 to release the locked state of the clamp 10, but of course, the worker may directly swing the lock arm 54. Further, the lock arm 54 may be electrically swung using an electromagnetic clutch or the like, and the operation of the electromagnetic clutch or the like may be remotely controlled.

Although not particularly described in the description of the above embodiment, in the configuration of the hanging clamp 10, since the arm member 50 protrudes downward as described above,
When the hanging clamp 10 is placed directly on the ground during storage or the like,
The arm member 50 may be deformed by its own weight. Therefore, it is desirable to prepare a dedicated mounting table that can support the hanging clamp 10 via the lower surface of the second frame 32 so that the arm members 50 do not touch the ground during storage. In this case, for example, if a mounting table having an H-shaped cross section is used, the H
It is convenient because the mounting table can be lifted and moved by the hanging clamp 10 in the same manner as the shaped steel 70.

[0043]

As described above, according to the present invention, a suspension clamp is constituted by the first frame and the chuck means provided thereon, and the chuck means is provided on the second frame and the second frame. A pair of arm members capable of coming and going, a link mechanism connecting the first frame and each arm member, a hook provided on each arm member, and a lock member detachable from the arm member. And the arm members are moved toward and away from each other while the link mechanism is expanded and contracted by lifting the first frame by a crane or the like, and each arm member can be held at a predetermined separated position by the lock member. Therefore, while placing the lifting clamp on the work with a crane or the like, the work can be lifted only by engaging and disengaging the lock member with respect to the arm member. It can be sent. Therefore, it is possible to save labor for attaching a hook to the work in the transfer operation, and to improve workability of the transfer operation.

In particular, in the above configuration, the first frame may be formed in a rod shape extending in a uniaxial direction, and a plurality of chuck means may be provided at predetermined intervals in the longitudinal direction of the first frame. In addition, a work such as an elongated shaped steel can be grasped and transferred in a well-balanced manner, thereby improving the safety of the transfer operation.

Further, if the hook portions of the respective arm members are offset in a direction orthogonal to the contact / separation direction of the respective arm members on a horizontal plane, and are provided so as to overlap in the aforementioned offset direction in a predetermined approach state of the respective arm members. In addition, the workpiece can be held and transported while being held by the arm member, and more types of workpieces can be transported.

[Brief description of the drawings]

FIG. 1 is a perspective view of a suspension clamp according to the present invention,
It is A sectional drawing.

FIG. 2 is a side view of the suspension clamp according to the present invention.

FIG. 3 is a schematic cross-sectional view showing a structure of a mounting portion of an arm member to a second frame (plate).

FIG. 4 is an explanatory diagram (a diagram showing a state in which the hanging clamp is arranged above the workpiece) for explaining a work transfer procedure by the hanging clamp.

FIG. 5 is an explanatory diagram (a diagram showing a state in which lifting of the work is started by the hanging clamp) for explaining a work transfer procedure by the hanging clamp.

FIG. 6 is a main part extraction diagram corresponding to FIG. 1 and showing a modification of the arm member.

FIG. 7 is a main part extraction diagram corresponding to FIG. 1 showing a modification of the arm member.

FIG. 8 is an explanatory view illustrating a conventional work (H-shaped steel) lifting operation procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Suspension clamp 12 1st frame 30 Chuck device 32 2nd frame 36 Side hole 38 Vertical hole 40A Front link mechanism 40B Rear link mechanism 50 Arm member 52 Hook 54 Lock arm 66 Rope

Claims (3)

(57) [Claims] 1. A hanging clamp for supporting a work so that it can be lifted in a gripped state, comprising a first frame connected to a crane or the like, and chuck means provided on the first frame. The means may be the first
A second frame disposed below the first frame, a pair of arm members provided on the second frame and movable in a horizontal direction, and upper and lower arms for connecting the first frame to the respective arm members. A link mechanism that can be extended and contracted in the direction, a hook portion provided on each arm member and provided below and facing the second frame, and a hook portion provided on the second frame and associated with the arm member. is composed of a detachable locking member, said link mechanism is configured to contact and separate each arm member in accordance with the expansion, the earth
The locking member has a shaft that is an engaged portion of the locking member.
And, upper Symbol locking member via a support shaft in the second frame
And swingably supported, and
At the end side, the shaft member comes into contact with the arm
A guide part which swings the lock member upward by contact with the
Is disposed between the guide portion and the support shaft, and is interposed through the shaft body.
And a recess that allows the arm member to move away.
And when the two arm members reach a predetermined spaced position,
The shaft is engaged with the arm member where the shaft intervenes.
A suspension clamp for preventing the movement of the lifting arm member . 2. The apparatus according to claim 1, wherein the first frame is formed in a rod shape extending in a uniaxial direction, and a plurality of chucking means are provided at predetermined intervals in a longitudinal direction of the first frame. The hanging clamp as described. 3. A hook portion of each of the arm members is offset in a direction orthogonal to a direction in which the arm members are moved toward and away from each other on a horizontal plane, and is provided so as to overlap with each other in the offset direction in a predetermined approach state of each of the arm members. The suspension clamp according to claim 1 or 2, wherein the suspension clamp is provided.