JP2004292076A - Lifting attachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem on a conventional lifting attachment using a crane with a pendant switch or a crane with a cylinder switch that a hand may be held between adjacent cargoes or the like when the cargo greatly oscillates because the lifted cargo is positioned while being held with one hand. <P>SOLUTION: The lifting attachment comprises a frame 1 whose upper end is anchored to a lifting carrier and whose lower part is provided with a pair of lifting hooks to be anchored to the lifted cargo and operating means for operating the lifting carrier and the lifting hooks. The lifting hooks each have a fixed hook 3 and a movable hook 4, and the operating means are grips 6a, 6b having operation switches 11, 12 provided at both ends of an arm 5 extending perpendicularly to the frame 1 for operating the actuation of the lifting carrier and the movable hooks 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lifting device that lifts and conveys a suspended load such as an engine of an automobile via a lifting / lowering device such as a crane.
[0002]
[Prior art]
Conventionally, when a vehicle engine or the like is lifted and conveyed, as shown in FIG. 6, a crane 22 with a pendant switch 21 is provided with a hook 23 to which a hook for opening and closing a chuck portion 24 is attached, or as shown in FIG. A crane 26 equipped with a cylinder switch 25 has been used with a hanging device in which a hook for opening and closing a chuck portion 24 is attached to a hook 23 as in FIG.
[0003]
However, when the crane 23 with the pendant switch is used, since the pendant switch 21 is operated with one hand, the suspended load has to be held by only one hand to position the suspended load. In addition, when the swing of the suspended load is large, there is a risk that the hand may be pinched between adjacent loads due to the swing of the suspended load.
[0004]
When the crane 26 with the cylinder type switch is used, in order to adjust the position of the suspended load with one hand in the rotation direction, similarly to the crane 22 with the pendant switch, the suspended load is held down with one hand and the positioning of the suspended load is performed. Therefore, there is a risk that the hand may be caught between the opening / closing part of the hanging tool and the hanging ear of the hanging load.
[0005]
Also, the pendant switch has a large number of push buttons, so when pressing a switch at a distant position, it is necessary to change the pendant switch and perform the operation, and one hand must hold the suspended load, The operation was complicated and required skill. The above-mentioned prior art is a well-known art, and no prior literature is shown.
[0006]
[Problems to be solved by the invention]
As described above, in a conventional lifting device using a crane with a pendant switch or a crane with a cylinder-type switch, the load is held by only one hand to position the load. However, there is a risk that a hand may be caught between adjacent loads, and there is a risk that a hand may be caught between the opening / closing part of the hanging tool and the hanging ear of the suspended load. There is a problem that the operation is complicated because the pressing is performed, and the operation requires skill.
[0007]
[Means for Solving the Problems]
The present invention solves the above-mentioned problems, and has a frame having a pair of hanging kanags, the upper end of which is engaged with a lifting / lowering transport device, and a lower portion of which is engaged with a suspended load, and operating means for operating the lifting / lowering transport device and the lifting kanags. A lifting device having a fixed kanag and a movable kanagu, and operating means provided at both ends of an arm extending horizontally from the frame, for operating the lifting / lowering transport device and the movable kanag. Characterized in that it is a grip provided with an operation switch for operating.
[0008]
According to the present invention, grips provided with operation switches are provided at both ends of an arm extending in a direction perpendicular to the frame, and by operating the operation switches, the lifting and lowering of the lifting and lowering transport device can be performed without directly touching the suspended load. Since the traversing operation and the opening / closing operation of the movable canag can be performed, the operation of transporting the suspended load can be performed safely and easily.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention comprises a frame having a pair of hanging kanags, the upper end of which is engaged with a lifting and lowering transport device, and a lower portion of which is engaged with a suspended load; A hanging device comprising: a hanging Kanag having a fixed Kanag and a movable Kanag; operating means are provided at both ends of an arm extending in a horizontal direction from a frame to operate the lifting / lowering transport device and the movable Kanag. It is characterized by a grip with an operation switch to operate, and a grip with an operation switch is provided at both ends of an arm extending horizontally from the frame, and by operating the operation switch, the load can be directly lifted. Since the lifting and lowering device can be moved up and down, traversing operation and opening and closing operation of the movable canag can be performed without touching the device, there is an effect that the operation of transporting the suspended load can be performed safely and easily.
[0010]
The invention according to claim 2 is characterized in that the arm is provided on the frame, is pivotally supported by a bearing portion extending in the horizontal direction, and is rotatable with respect to the frame. This makes it possible to reduce the load on the operator's wrist during the transport operation of the suspended load, and to operate the arm.Also, even when there is a height difference between the transfer position of the suspended load and the operation position, the arm rotates. By doing so, there is an effect that the transport operation can be performed safely without imposing a burden on the wrist.
[0011]
The invention according to claim 3 is characterized in that the movable canag is rotatably supported by a rotating shaft provided on the frame and is rotated in the opening and closing directions by a driving means operated by an operation switch. By operating the operation switch provided on the arm with the movable kanag to open and close, there is an effect that the hanging load can be engaged without touching the hanging load.
[0012]
The invention according to claim 4 is characterized in that the fixed Kanag and the movable Kanag have an opening which engages with the engaging portion provided on the suspended load, and the fixed Kanag and the movable Kanag are provided on the suspended load. This has the function of reliably engaging the engaging portion.
[0013]
The invention according to claim 5 is configured to detect that the fixed and movable canags are lowered to a position where the hanging load can be engaged with the suspended load, and to stop the descending operation. It has a second limit switch that stops when the fixed and movable kanags have fallen from the suspended load to a position where it can be removed from the suspended load, and a limit switch that detects the open / closed state of the movable kanags. The second limit switch is operable at the time of detecting the closed state of the canag, and has an operation capable of smoothly performing lifting / lowering conveyance and transfer operations of a suspended load.
[0014]
Embodiment
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.
[0015]
FIG. 1 is a front view showing the hanging device of the present invention, FIG. 2 is a left side view, FIG. 3 is a right side view, FIG. 4 is a plan view of an arm portion, and FIG. 5 is a bottom view of FIG.
[0016]
In the figure, reference numeral 1 denotes a plate-shaped frame, which is provided at its upper end with a hanging kanag 2 for hooking a hook such as a crane, and at a lower portion with a fixed kanag 3 and a movable kanag 4 which are engaged with a load 19. 2 is fixed to the upper end of the frame 1, and a hanging hook for engaging a hook such as a crane. 3 is fixed to one end of the lower part of the frame 1 by hanging and engaging with an engaging portion 20 such as a hook provided on the suspended load 19. A fixed kanag 4 having an opening 3a to be fitted thereto is a movable kanag 4 which is hung on the other side of the fixed kanag side at the lower part of the frame and is rotatably supported about a rotating shaft 4b. And an arm 4c fixed to the base. After inserting the opening 3a of the fixed Kanag 3 into the engaging portion 20 of the suspended load 19, the movable Kanag 4 operates the operation lever 12 described later to operate the solenoids 7 and 8, thereby moving the movable Kanag 4 from the open position to the closed position. The opening 4 a of the canag 4 is inserted into the engaging portion 20 of the suspended load 19. Reference numeral 5 denotes an arm which extends downward in the horizontal direction by the frame 1 and is rotatably supported by a bearing 1a provided at an end on the movable kana side of the frame 1. Operation arms 6a and 6b are provided at both ends. . Reference numeral 6a denotes an operation grip provided with an operation lever 11 for operating the crane to travel and traverse in the vicinity, and 6b denotes an operation grip provided near the operation lever 12 for operating the vertical movement of the crane and the opening / closing operation of the movable kanag 4. , 6 b are rotatable with respect to the frame 1 by the arm 5. A solenoid 7 is provided with a drive shaft 7a linked to the arm 4c, reciprocates the drive shaft 7a, and opens and closes the movable kanag 4. A drive shaft 8a is linked to the movable kanag 4 and drives the drive shaft 8a back and forth. And a solenoid that opens and closes the movable canag 4 in cooperation with the solenoid 7. Note that the solenoids 7 and 8 are arranged at upper and lower positions 4d and 4e about the rotary shaft 4b so that the movable canag 4 can rotate without play. Reference numeral 9 denotes a position detecting rod which is suspended below the frame 1 substantially at the center of the fixed and movable canags 3 and 4 and which is provided on the frame 1 so as to be movable up and down. An object 10 for detecting the position of the vertical movement of 9 is provided at the lower end of the position detecting rod 9, and a pad which comes into contact with the suspended load 19, and 11 and 12 are operation switch means provided on the upper portions of the grips 6a and 6b. The operation lever 11 performs traveling and traversing operation of the crane, the operation lever 12 performs up and down movement of the crane and the opening and closing operation of the movable canag 4, and each of the operation levers 11 and 12 operates at the time of operation. The grips 6a and 6b are held at the upper surface of the grip so that the operator can grip the grips 6a and 6b with the palm of the hand and operate with the thumb. Reference numeral 13 denotes a limit switch for detecting opening and closing of the movable kanag 4, reference numeral 14 denotes a first limit switch for detecting a lowering operation of the detection object 9a of the position detection rod 9, and the first limit switch 14 is engaged with a suspended load. When there is no load and the movable canag 4 is open, the hanging device descends at the rated speed, and continues to descend even after the pad 10 of the position detecting rod 9 comes into contact with the suspended load 19. The opening 3a of the fixed canag 3 is arranged to operate slightly before reaching the position where it can be inserted into the engaging portion 20 provided on the suspended load 19. Further, after the first limit switch 14 is actuated, the suspending device stops descending after descending by the braking distance at the rated speed, and at the stop position, the opening 3 a of the fixed canag 3 is engaged with the engaging portion 20 of the suspended load 19. Can be inserted into Reference numeral 15 denotes a second limit switch which is provided at a position slightly higher than the limit switch 14 and detects a descending operation of the crane when the crane is inchingly lowered in a loaded state in which the lifting device is engaged with the suspended load. . Reference numeral 16 denotes a bearing portion fixed to the frame and supports the position detection rod 9 so as to be able to move up and down, 17 a balance weight, 18 a hook of a crane or the like, 19 a suspended load, and 20 an engagement of a hook provided on the suspended load 19 or the like. Department.
[0017]
Next, a description will be given of the lifting / lowering transport operation of the suspended load in the hanging device of the present embodiment having the above-described configuration.
[0018]
First, in a state where the limit switch 13 detects the open state of the movable canag 4, that is, in a state where there is no load in which the hanging load and the hanging device are not engaged, the operation lever 12 is operated and a crane (not shown) is operated. When the lifting device descends at the rated speed by the descending operation, the pad 10 of the position detecting rod 9 comes into contact with the suspended load 19. The lifting device continues its lowering operation, and the first limit switch 14 is activated slightly before the opening 3a of the fixed canag 3 reaches a position where it can be inserted into the engaging portion 20 of the suspended load 19, and the lifting drive motor is driven. (Not shown). After the motor stops, the hanger device descends by a fixed braking distance during the descending operation at the rated speed, and when the opening 3a of the fixed canag 3 reaches the insertion position in the engaging portion 20 of the suspended load 19, it descends. Stop operation.
[0019]
Next, while grasping the grips 6 a and 6 b, the hanging device is moved to the engaging portion 20 side of the hanging load 19, and the opening 3 a of the fixed canag 3 is inserted into the engaging portion 20 of the hanging load 19.
[0020]
Next, the operating lever 12 is operated to operate the solenoids 7 and 8 to rotate the movable kanag 4 from the open position to the closed position, so that the opening 4 a of the movable kanag 4 is engaged with the engaging portion 20 of the suspended load 19. insert.
[0021]
Next, when the operation lever 12 is operated to raise the crane, the openings 3a and 4a of the fixed and movable kanags 3 and the engagement portions 20 of the suspended load 19 are engaged, and the operation lever 11 is operated. Thus, the hanging device conveys the suspended load 19 to a predetermined position.
[0022]
Next, the operating lever 12 is operated to lower the hoisting device, and when the hanging load 19 approaches the mounting position, the operating lever 12 performs an inching operation in which the ON-OFF operation is repeated in a short time so that the hanging load 19 is moved. It is lowered at a low speed and lowered and fixed at the position where the suspended load is placed.
[0023]
Next, when the inching lowering operation is further continued, the hooking device releases the engagement between the openings 3a, 4a of the fixed kanag 3 and the movable kanag 4 and the engaging portion 20 of the suspended load 19, and further performs the inching lowering operation. Continuing, the second limit switch 15 is actuated slightly before the openings 3a, 4a of the fixed and movable kanags 3 reach the detachable position where the opening 3a, 4a of the movable kanag 4 can be disengaged from the engaging portion 20 of the suspended load 19 in the horizontal direction. The lifting drive motor (not shown) is stopped. After the motor stops, the hanging device descends by a predetermined braking distance in the inching descending operation, reaches the position where the opening 4a of the movable canag 4 can be disengaged from the engaging portion 20 of the suspended load 19, and stops the descending operation.
[0024]
Next, the operating lever 12 is operated to rotate the movable kanag 4 from the closed position to the open position, the movable kanag 4 is separated from the engaging portion 20 of the suspended load 19, and the hanging device is suspended while grasping the grip. The load 19 is moved in a direction away from the engaging portion 20, the opening 3a of the fixed canag 3 is separated from the engaging portion 20 of the suspended load 19, and the transfer operation of the suspended load 19 is completed.
[0025]
In the above description, the suspended load 19 is lowered to the mounting position in a state where the limit switch 13 detects the closed state of the movable canag 4, that is, in a state where there is a load in which the suspended load and the hanging device are engaged. During the inching operation, since the lifting device descends at a low speed, the braking distance after the limit switch is actuated is shorter than the distance when the rated speed is lowered. It is arranged at a position higher by the distance difference.
[0026]
As described above, since the second limit switch is disposed at a position higher than the first limit switch, the lifting device is lowered at a rated speed in a state where there is no load to engage the load, and when the load is loaded. Even during the inching lowering operation in a state where there is a load, which is fixed at the installation position, the positioning of the hanging device becomes reliable and easy, and the operation of attaching and detaching to and from a smooth suspended load becomes possible.
[0027]
As described above, the detection of the presence or absence of a suspended load in the descending operation of the lifting device is performed by the limit switch 13, and when the movable kanag 4 is in the open position, there is no load, and the movable kanag 4 is in the closed position. It is determined that there is a load, and when there is no load capable of descending at the rated speed, there is a braking distance at the rated speed. Therefore, when the limit switch 13 detects the open position of the movable kanag 4, Only when the first limit switch 14 is set to be detectable and the load is low and the inching operation is performed at a low speed, the limit switch 13 detects the closed position of the movable pinion 4 because there is a low-speed braking distance. Only when this is the case, the detection of the second limit switch 15 is set to be possible. That is, when the limit switch 13 detects the closed position of the movable canag 4, the lowering operation is not stopped even if the detection target 9 a operates the first limit switch 14.
[0028]
Next, a method of operating the operation levers 11 and 12 will be described. As described above, the operating lever 11 performs traveling and traverse operation of the crane. For example, the operating lever 11 is moved by tilting the operating lever 11 back and forth in FIG. 4 (north-south in the figure) and left and right (east-west in the figure). It is rampant by. The operation lever 12 is used to move the crane up and down and open and close the movable kanag 4. When the crane is tilted upward in FIG. 4, the crane is raised, when it is tilted downward, it is lowered, and when it is tilted left. Accordingly, the movable canag 4 rotates in the closing direction, and is tilted rightward to rotate in the opening direction.
[0029]
As described above, the hanging device of the present embodiment is provided on the frame 1, is supported by the bearing 1 a extending in the horizontal direction, and is provided with the operation grips on both ends of the arm 5 rotatable with respect to the frame 1. By providing the operation levers 11 and 12 near the operation grip, it is possible to reduce the load applied to the operator's wrist during the transfer operation of the suspended load 19, and to operate without touching the suspended load. Can be performed, and the operation of changing the operation switch of the conventional hanging tool is not required. Therefore, the transport operation of the suspended load 19 can be performed safely and easily without skill.
[0030]
In addition, since the operation grips 6a and 6b are rotatable by the arm 5 and the bearing 1a, even when there is a height difference between the transfer position of the suspended load and the operation position, the arm 5 is rotated so that The added load can be reduced, and the transport operation can be performed safely.
[0031]
In the above-described embodiment, the operation levers 11 and 12 have been described as operation switches. However, the operation lever is not limited to the operation lever, and may be, for example, an operation button.
[0032]
【The invention's effect】
The present invention provides a grip provided with an operation lever at both ends of an arm extending horizontally from a frame, and operating the operation lever to perform lifting / lowering of a lifting / lowering transport device, traversing operation, and opening / closing operation of a movable canag. Can be carried out safely and easily without touching the suspended load.Furthermore, by making the arm rotatable, it is possible to move the suspended load to the operator's wrist during the transport operation of the suspended load. Reduce the added load, and even when there is a height difference between the transfer position of the suspended load and the operation position, rotate the arm to carry out the transport operation safely without placing a burden on the operator's wrist Can be.
[Brief description of the drawings]
FIG. 1 is a front view showing a hanging device of the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a plan view of an arm unit.
FIG. 5 is a bottom view of FIG. 2;
FIG. 6 is a front view showing a hanger attached to a conventional crane with a pendant switch.
FIG. 7 is a front view showing a hanger attached to a conventional crane with a cylinder type switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 1a Bearing part 2 Hanging canag 3 Fixed canag 3a Opening 4 Movable canag 4a Opening 4b Rotary shaft 4c Arm 5 Arm 6a, 6b Operation grip 7, 8 Solenoid 9 Position detection rod 9a Detected object 10 Pad 11, 12 Operation Lever 13 Limit switch 14 First limit switch 15 Second limit switch 16 Bearing 17 Balance weight 18 Hook 19 Suspended load 20 Engagement

Claims (5)

A hanging device having an upper end engaged with a lifting / lowering transport device and a lower portion having a pair of hanging kanags to be engaged with a suspended load, and operating means for operating the lifting / lowering transport device and the hanging kanag, wherein the hanging kanag is provided. Has a fixed kanag and a movable kanagu, and the operating means is a grip provided at both ends of an arm extending horizontally from the frame and provided with operation switches for operating the lifting / lowering transport device and the movable kanag. A hanging device. The hoisting device according to claim 1, wherein the arm is provided on the frame, is supported by a bearing portion extending in a horizontal direction, and is rotatable with respect to the frame. 2. The hanging device according to claim 1, wherein the movable canag is rotatably supported by a rotating shaft provided on the frame, and is rotated in opening and closing directions by driving means operated by an operation switch. The hanging device according to any one of claims 1 to 3, wherein the fixed kanag and the movable kanag have an opening that engages with an engaging portion provided on the suspended load. A first limit switch that stops the lowering operation by detecting that the fixed and movable kanags have descended to a position where the fixed and movable kanags can be engaged with the suspended load. It has a second limit switch for detecting that it has been lowered to the detachable position and stopping the lowering operation, and a limit switch for detecting the open / closed state of the movable kanag. The hanging device according to any one of claims 1 to 4, wherein the limit switch is operable.

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