JP2018177408A - Lifting device and lifting method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting device capable of holding an inclined workpiece as it is and lifting it up while being maintained in a horizontal state, and a lifting method thereof.SOLUTION: A balancer 5 is arranged between a clamp 4 holding a workpiece 2 and a supporting frame 1. The posture of the clamp 4 is kept at a set angle through an output wire of the balancer 5. When the gravity of the workpiece 2 is applied to the output wire, the set angle is released so that the direction of the clamp 4 is made parallel to a self-weight direction and the workpiece 2 is lifted up as it is while the workpiece held orthogonally to the clamp is kept horizontal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for lifting a long work and a method for lifting the same.

  The workpiece lifting apparatus described in Patent Document 1 below is provided with a workpiece gripping frame that detachably grips a workpiece at the end of the lifting rod, and can be rotated via a shaft provided with the workpiece gripping frame. It is characterized in that the balancer is rotatably mounted on the shaft, and the balancer is provided with angle setting means for gripping the balancer at an arbitrary angle with respect to the workpiece gripping frame.

  Then, at the same time the work is lifted, the work is reversed and converted into an arbitrary posture. In addition, it is described that it is not necessary to select the holding position of the work, and the work can be reversed simply by changing the position of the balancer, and a safe work supporting device is provided. The long work is described as being held by a vise-type work holding frame.

Japanese Utility Model Application Publication No. 2-2390

The workpiece lifting apparatus described in Patent Document 1 is described as gripping a workpiece with a vise-type workpiece gripping frame, changing the gripping angle to an arbitrary angle, and lifting it at the arbitrary angle. When the workpiece is gripped at an arbitrary angle and the inclination angle of the workpiece is close to the direction of gravity, the workpiece may come off the workpiece gripping frame. In addition, there is a drawback that attachment and detachment of the work is extremely troublesome.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a lifting device and a lifting method thereof which is extremely easy to grip a workpiece and securely grips the workpiece even in a narrow place and does not drop it.

The invention according to claim 1 comprises a support frame 1 arranged at the top,
A clamp 4 suspended from the support frame 1 and gripping the work 2 by at least a pair of open and close claws 3;
A balancer 5 interposed between the clamp 4 and the support frame 1 to hold the attitude of the clamp 4 at a set angle, and in which the clamp 4 holds the work 2;
When the weight of the workpiece 2 held by the balancer 5 is added to the balancer 5, the posture of the set angle is released, and the clamp 4 is directed parallel to the weight direction to grip the workpiece 2 horizontally. It is a lifting device characterized by the above.

According to the second aspect of the present invention, the top portion 7 of the clamp body 6 of the clamp 4 is supported by the support frame 1, and the pair of locking portions 6 a spaced apart in the thickness direction of the clamp body 6 each output It is supported by the pair of balancers 5, 5 via wires 8a, 8b, and holds the posture of the clamp body 6 at a set angle,
The clamps 4 are spaced apart in the width direction of the clamp main body 6, and the pair of curved claws 3 are arranged, and each pair of claws 3 is driven to open and close in the thickness direction of the clamp main body 6, The lifting device according to claim 1, wherein the pair of claws grips two places spaced apart in the longitudinal direction of the workpiece.

  The present invention according to claim 3 is an output wire in which the pair of balancers 5, 5 are externally led from the wire outlet 5b of the balancer main body 5a by the biasing force of the spring leaf spring installed in the balancer main body 5a. A tension is applied to 8a and 8b in the direction of drawing into the balancer main body 5a, and a stopper 9 detachably engaged with the outer periphery of the output wires 8a and 8b abuts against the wire outlet 5b of the balancer main body 5a. The lifting device according to claim 2, wherein the set angle of the posture of the clamp 4 is held via the pair of output wires 8a and 8b.

  According to the present invention as set forth in claim 4, the setting angle of the posture of the clamp 4 is changed by changing the locking position of the stopper 9 locked to the output wires 8a, 8b. It is a lifting device.

  In the present invention according to claim 5, a pair of the balancers 5, 5 are respectively attached to the support frame 1, and the support frame 1 is lifted and lowered to lift the work 2 so as to be able to be lifted and lowered. It is a lifting device according to any one of claims 1 to 4.

  The supporting frame 1 according to the present invention is characterized in that the clamp 4 includes the pair of output wires 8 a and 8 b of the pair of balancers 5 and 5 and the suspension wire 10 suspended from the support frame 1. The lifting device according to any one of claims 1 to 5, wherein the lifting device is attached to each of the two.

  In the present invention according to claim 7, the support frame 1 is composed of a long scale 1a, and an end of a balance tip arm 12a whose plane is orthogonal to the direction of gravity is pivotally supported at one end of the scale 1a. The balance tip arm 12a is configured to be able to be held at an arbitrary angle around its axis, and the pair of balancers 5 are locked on both sides of the balance tip arm 12a. It is a lifting device described in.

In the present invention according to claim 8, the support frame 1 is composed of a long scale 1a, the clamp 4 is attached to one end in the longitudinal direction of the scale 1a, and the balance weight 11 is attached to the other end. And
The lifting device according to any one of claims 1 to 7, wherein the other end of the balance 1a is suspended parallel to the balance support frame 12 via a plurality of wires 13 separated in the longitudinal direction of the balance 1a. is there.

The present invention according to claim 9 is the method for lifting a work by the lifting device according to claim 8.
By a lifting method in which the entire load gravity center D including the work 2 is positioned between the plurality of wires 13 and the balance weight 11, and the balance 1a and the balance support frame 12 are held in parallel. is there.

In the invention according to claim 1, the clamp 4 is suspended from the support frame 1, and the work 2 is gripped by the pair of opening and closing claws 3 of the clamp 4, and the balancer 5 is interposed between the clamp 4 and the support frame 1. By holding the clamp 4 at the set angle, the clamp 4 grips the workpiece 2 in that posture, and the weight of the workpiece 2 is applied to the balancer 5 to release the posture of the set angle, The direction of the clamp 4 is parallel to the self-weight direction, and the work 2 is gripped in the horizontal direction. Therefore, the gripping of the work is stabilized, and there is no danger that the work may come off the clamp 4.
That is, by holding the work 2 in a state in which the posture of the clamp 4 is maintained at the set angle via the balancer 5, then the work 2 is maintained horizontally by applying its own weight to the clamp 4. The workpiece 2 can be lifted in the horizontal state.
At this time, since the work 2 changes from the set angle to the horizontal position using its own weight, the swing of the work is eliminated, and the work 2 is not detached from the clamp 4.

The invention according to claim 2 supports the top portion 7 of the clamp body 6 of the clamp 4 on the support frame 1 and attaches the output wires 8a and 8b of the pair of balancers to the pair of locking portions 6a of the clamp body 6 The posture of the clamp body 6 is held at the set angle. Therefore, the posture of the clamp 4 can be stably maintained, and the workpiece 2 can be gripped with accuracy by the clamp 4.
Further, a pair of curved claws 3 is arranged in parallel to the clamp 4, and each pair of claws 3 is driven to be freely opened and closed in the thickness direction of the clamp main body 6 to stabilize two places of the workpiece 2 in the longitudinal direction. It can be gripped.

The invention according to claim 3 is to apply tension to the output wires 8a and 8b by the biasing force of the spring-loaded spring incorporated in the balancer main body 5a, and hold it at the set angle of the posture of the clamp 4 via the stopper 9. is there.
Therefore, the posture control of the clamp 4 can be performed with an extremely simple structure, and can be easily grasped in accordance with the inclination of the work.

  The invention according to claim 4 changes the setting angle of the posture of the clamp 4 by changing the position of the stopper 9 locked to the output wires 8a and 8b of the balancer 5, and adjusts the posture to the inclination of the work 2 be able to.

  The invention according to claim 5 attaches the pair of balancers 5, 5 to the support frame 1, lifts the support frame 1, and lifts the work 2 so as to be able to move up and down. Therefore, the workpiece 2 can be stably lifted with a simple configuration.

In the invention according to claim 6, the clamp 4 is attached to the pair of output wires 8a and 8b of the balancers 5 and 5, and the suspension wire 10 from the support frame 1 is attached to the clamp.
As described above, by suspending the clamp 4 by the output wires 8a and 8b and the suspension wire 10, the height at which the workpiece 2 can be lifted can be made higher.

  The invention according to claim 7 is configured such that the end of the balance tip arm 12a is pivotally supported at one end of the balance 1a, and the balance tip arm 12a can be held at an arbitrary angle around its axis. is there. Therefore, according to the direction and inclination of the workpiece 2, the balance tip arm 12a can be rotated about the axis, and the workpiece 2 can be grasped quickly.

In the invention according to claim 8, the clamp 4 is attached to one end of the balance 1a in the longitudinal direction, and the balance weight 11 is attached to the other end.
The clamp 4 at one end can be stably maintained horizontally by the balance weight 11 at the other end.

The invention according to claim 9 is characterized in that the entire load gravity center D including the work 2 is positioned between the plurality of wires 13 of the balance support frame 12 and the balance weight 11, and the balance 1 a and the balance support frame 12 Is a method of lifting in parallel.
The work 2 can be stably lifted by maintaining the balance 1a and the balance support frame 12 in parallel in this manner.

The principal part front view of the lifting apparatus of this invention. The same side view. The front view of the 1st process and the 2nd process which shows the lifting method of the lifting apparatus. The front view and BB sectional drawing of the stopper 9 attached to output wire 8a, 8b of the same lifting apparatus. The top view of the balance tip arm 12a provided in the tip of the lifting device. Top view of support frame 1 or balance 1a The right view of FIG. Explanatory drawing which shows the other lifting method of the lifting apparatus of this invention. Explanatory drawing which shows the further another lifting method of the lifting apparatus of this invention. Explanatory drawing which shows the support state of the other workpiece | work seen from the same direction as FIG. It is a perspective view which shows the principal part of the apparatus, Comprising: The state which maintained the workpiece | work 2 horizontal is shown.

Next, an embodiment of the present invention will be described based on the drawings.
1 to 7 show a first embodiment of a lifting apparatus and lifting method according to the present invention.
In this embodiment, the clamp 4 is suspended on the support frame 1 composed of the balance 1a via the pair of suspension wires 10 and the pair of output wires 8a and 8b. The clamps 4 are spaced apart from each other in the width direction of the clamp main body 6 in the front view shown in FIG. The claws 3 are curved in the direction in which the claws 3 face each other in FIG. 2 showing a side view thereof, and they are provided so as to be openable and closable by extension and contraction of the hydraulic cylinder 15.

  The top portion 7 of the upper end of the clamp body 6 is suspended to a locking portion 16 projecting from the lower surface of the support frame 1 via a suspension wire 10 and a ring 18. Further, as shown in FIGS. 1 and 2, a pair of balancers 5, 5 are suspended on both sides of the support frame 1, and the tip of a pair of output wires 8 a, 8 b extending from the balancers 5, 5 is a clamp body 6. Are locked to the respective locking portions 6a. A spring (not shown) is accommodated inside the balancer main body 5a, and a tension is applied in a direction to draw the output wires 8a and 8b into the interior by the biasing force. A stopper 9 is detachably attached to the output wires 8a and 8b, and abuts on a wire outlet 5b provided at an end of the balancer main body 5a. And in FIG.1 and FIG.2, the attitude | position of the clamp 4 is maintained in the diagonal direction, and the workpiece | work 2 is hold | gripped in the state of the attitude | position. The clamp 4 is unloaded immediately before gripping.

Next, when the workpiece 2 is gripped and its own weight is applied to the clamp 4, the clamp 4 changes its posture from the solid line state to the dashed line state. FIGS. 3A and 3B are explanatory diagrams showing the state of the change.
First, as shown in FIG. 3A, the clamp 4 grips the work 2 in the inclined state. At this time, the lower end of the work 2 is in contact with the ground contact surface 19 such as the ground. Then, when the support frame 1 is moved upward as shown in FIG. 3B, the weight of the work 2 is added to the clamp 4. Then, the output wires 8a and 8b are pulled down against the tension of the spiral spring inside the balancer main body 5a, the stopper 9 moves downward from the wire outlet 5b of the balancer main body 5a, and the position of FIG. Come on. Then, the axis of the clamp 4 is perpendicular to the ground contact surface 19, and the workpiece 2 gripped thereby is gripped horizontally (FIG. 3 (B)). The side condition is as shown in FIG.

That is, in FIG. 3, the entire center of gravity is located at point C in FIG. 3A immediately before the clamp 4 grips the work 2 as shown in FIG. Then, when the support frame 1 is moved upward and the work 2 is lifted as shown in (B), the load gravity center D moves to the left as shown in (B). At this time, the clamp 4 including the work 2 and the support frame 1 are in balance with the balance weight 11, and the overall load thereof is supported by the plurality of wires 13 on the balance support frame 12. And the balance support frame 12 and the support frame 1 are maintained horizontally. Then, if the balance support frame 12 is raised via the elevator wire 17, the work 2 is lifted and moved while maintaining the level.
At this time, the loads of the work 2, the clamp 4, and the support frame 1 are balanced to the balance weight 11. The balance load is supported by a plurality of wires 13. Since the load center of gravity D is inside the plurality of (four) wires 13, the balance 1a is maintained horizontal. When the load center of gravity D is in the plane (FIG. 6) formed by the tips of the four wires 13, the balance 1a maintains the horizontal state and balances. When no load is applied, the center of gravity moves to point C in FIG.

Next, FIG. 8 is an explanatory view showing another lifting method of the work 2 of the present invention.
In this example, the top 7 of the clamp 4 is supported by the end of the support frame 1 via the ring 18, and the tips of the output wires 8a and 8b of the balancer 5 are locked to the locking portion 6a of the clamp 4. It is. In the unloaded state without the work 2, the axis of the clamp 4 is maintained at 45 degrees as shown in the figure. Then, while holding the work 2 by the claws 3 and lifting the support frame 1 upward, the weight of the work 2 is added to the clamp 4 and the clamp 4 becomes horizontal from an angle of 45 degrees. Then, by raising the support frame 1 as it is, the work 2 can be lifted in a horizontal state.
In FIG. 8, when the work 2 is horizontal, the weight of the work 2 is added to the output wires 8a and 8b of the balancer 5, so the stopper 9 moves away from the wire outlet 5b of the balancer main body 5a and moves downward.

Next, FIG. 9 shows an example in which the axis of the clamp 4 is inclined at 60 degrees.
As described above, in order to set the angle of the clamp 4 to 60 degrees, the position of the stopper 9 to be locked to the output wires 8a and 8b may be changed. That is, as compared with the case of FIG. 8, the engagement position between the stopper 9 and the output wires 8a and 8b may be attached further downward. Then, the stopper 9 is positioned at the end surface of the wire outlet 5 b of the balancer 5 at a lower position. Then, the posture of the clamp 4 is held at an angle of 60 degrees with respect to the horizontal plane. Therefore, the posture of the clamp 4 can be arbitrarily changed by changing the position of the stopper 9 appropriately. That is, the holding postures of the clamp 4 and the claw 3 can be changed in accordance with the inclination of the work 2.

As shown in FIG. 4, the clamp 4 is formed by clamping a pair of blocks 9a and 9b with a pair of bolts 9c. Then, the output wires 8a and 8b are detachably held between the two blocks 9a and 9b. The clamp 9 is, as shown in FIG. 1, seated so as to be able to contact and release the wire outlet 5b of the balancer main body 5a.
FIG. 11 is a perspective view showing the main part of the same apparatus, showing a state in which the load of the work 2 is applied to the clamp 4 and the work 2 is held horizontally.
Next, FIG. 10 is an explanatory view showing a supporting state of another work viewed from the same direction as FIG. In this figure, the workpiece 2 is an elongated angled member.

Reference Signs List 1 support frame 1a balance 2 work 3 claw 4 clamp 5 balancer 5a balancer main body 5b wire outlet 6 clamp main body 6a locking portion 7 top 8a output wire 8b output wire 9 stopper 9a, 9b block 9c bolt 10 suspension wire 11 balance weight 12 Balance support frame 12a Balance end arm 12b Axis 13 Wire 14 Hydraulic hose 15 Hydraulic cylinder 16 Locking part 17 Elevator wire 18 Ring 19 Ground plane C No load center of gravity D Load center of gravity

Claims (9)

A support frame (1) arranged above,
A clamp (4) suspended from the support frame (1) and gripping the work (2) by at least a pair of open and close claws (3);
The clamp (4) is interposed between the clamp (4) and the support frame (1), holds the clamp (4) at a set angle, and the clamp (4) grips the work (2) in that posture With the balancer (5)
When the weight of the workpiece (2) held by the balancer (5) is added to the balancer (5), the posture of the set angle is released, and the direction of the clamp (4) is parallel to the weight direction. A lifting device characterized by gripping in the horizontal direction. A top portion (7) of a clamp body (6) of the clamp (4) is supported by the support frame (1), and a pair of locking portions (6a) separated in the thickness direction of the clamp body (6) Each is supported by the pair of balancers (5) and (5) via output wires (8a) and (8b) to hold the posture of the clamp body (6) at a set angle,
The clamps (4) are spaced apart in the width direction of the clamp body (6), and the pair of curved claws (3) are arranged, and each pair of claws (3) is formed of the clamp body (6) The lifting device according to claim 1, wherein the lifting device is driven so as to be openable and closable in a thickness direction, and grips two places separated in the longitudinal direction of the work (2) by the pair of claws (3).   The pair of balancers (5), (5) is an output wire (lead wire) led to the outside from the wire outlet (5b) of the balancer body (5a) by the biasing force of the spiral spring installed inside the balancer body (5a). 8a) A tensioner is applied to (8b) in the direction of pulling it into the balancer body (5a), and a stopper (9) detachably engaged with the outer periphery of the output wire (8a) (8b) The lifting device according to claim 2, wherein the set angle of the posture of the clamp (4) is held in contact with the outlet (5b) of 5a) via a pair of output wires (8a, 8b).   The lifting device according to claim 3, wherein the setting angle of the posture of the clamp (4) is changed by changing the locking position of the stopper (9) locked to the output wire (8a) (8b).   The pair of balancers (5) (5) are respectively attached to the support frame (1), and the support frame (1) is lifted and lowered to lift the work (2) so as to be able to be lifted and lowered. A lifting device according to any of the preceding claims.   The clamp (4) is connected via the pair of output wires (8a) (8b) of the pair of balancers (5) (5) and the hanging wire (10) suspended from the support frame (1) A lifting device according to any of the preceding claims, wherein the lifting device is mounted on the support frame (1) respectively.   The support frame (1) is an elongated balance (1a), and an end of a balance tip arm (12a) whose plane is orthogonal to the direction of gravity is pivotally supported at one end of the balance (1a), and its axis The balance tip arm (12a) is configured to be able to be held at any angle around the pair of balancers (5) (5) engaged on both sides of the balance tip arm (12a). The lifting device according to any one of claims 6. The support frame (1) comprises a long balance (1a), and a clamp (4) is attached to one end of the balance (1a) in the longitudinal direction, and a balance weight (11) is attached to the other end And
The other end of the balance (1a) is suspended parallel to the balance support frame (12) via a plurality of wires (13) spaced apart in the longitudinal direction of the balance (1a) The lifting device according to any one. A method of lifting a work by the lifting device according to claim 8
A balance (1a) and a balance support frame (12) are formed by positioning the entire load center of gravity D including the work (2) between the plurality of wires (13) and the balance weight (11). A lifting method designed to hold in parallel.

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