JPH10310364A - Hanger fork device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hanger fork device fitted to the tip section of the boom device of a crane and having improved handling operability by arranging a hoisting device having an arm movable longitudinally against a saddle at the upper end section of a post erected on a beam fixed with a fork. SOLUTION: A hoisting device 2 provided with a saddle 5, a cylinder device, and an arm 7 is arranged at the upper end section of a post 4 erected on a beam 31 fixed with a fork 3 to form this hanger fork device 1. The saddle 5 is slidably inserted into the arm 7, and the cylinder device is arranged through the inside of the saddle 5 in this hoisting device 2. When a pallet 11 loaded with a conveyance object 17 is to be handled, a rotator 18 is rotated, the fork 3 is faced forward, and the tip section of the fork 3 is moved near to the pallet 11. The arm 7 is advanced along the saddle 5 by the cylinder device, the fork 3 is horizontally moved and inserted into the pallet 11, and the pallet 11 can be hoisted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanger fork device which is attached to a tip of a boom device of a crane as an attachment and is used for cargo handling work.

[0002]

2. Description of the Related Art Conventionally, goods are piled up at a high place outdoors,
Alternatively, as a cargo handling device used for loading and unloading from a high place, there is a cargo handling device in which a hanger fork device is attached as an attachment to a distal end of a boom device of a vehicle-mounted crane.

As shown in FIG. 13, a hanger fork device 101 is hung by a rotator 18 on a distal end boom 92 of a boom device 90 which can be extended and retracted. The fork 103 is inserted into the pallet 11 and the boom device 90 is moved to place the pallet 11 at a predetermined position.

In the process of inserting the fork 103 into the pallet 11 or extracting the fork 103 from the pallet 11, the fork 103 has to be moved substantially horizontally. There is.

That is, the fork 103 is placed on the pallet 11
In the step of inserting the boom device 90, the operation of extending and falling down the boom device 90, and in the process of extracting the fork 103 from the pallet 11, the operation of reducing and raising the boom device 90 must be performed simultaneously.

However, in order to move the fork 103 substantially horizontally by simultaneously performing the operation of extending and retracting the boom device 90 and the operation of raising and lowering the boom device 90, a high degree of operation skill is required, and the operation depends on the skill of the operator. The pallet 11 is likely to be damaged due to the collision, and the conveyed article 17 is likely to fall down.

Further, since the upper end of the hanger fork device 101 is connected to the rotator 18 by a connecting pin 102 and suspended, if the center of gravity differs depending on the shape and weight of the conveyed object 17, the conveyed object is lifted. When the fork 103 moves, the fork 103 changes to an inclined surface, and is therefore unstable.

Therefore, as shown in FIG.
06 and the hanger fork device 101 are connected via a connecting rod 104, and a tension spring 105 is provided between an intermediate portion of the hanger fork device 101 and the connection pin 102, so that the load of the conveyed article 17 and the tension of the tension spring 105 are provided. There has also been proposed a device which attempts to hold the fork 103 horizontally by equilibrating the pressure (see Japanese Utility Model Publication No. 53-6220).

However, in such a hanger fork device 101, the fork 103 can be held horizontally.
7, the tension spring 105 is pulled and the connecting rod 104 stays within the range of being vertical.
There is a drawback that rocking tends to occur due to expansion and contraction of the spring 05, and the tension spring 105 is easily damaged by contact with an external object. In addition, the fork 103 is inserted into the pallet 11 or the fork 1
The difficulty in moving 03 horizontally has not been solved.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in a hanger fork device. In the process of inserting a fork into a pallet or extracting a fork from a pallet, the operation of extending and retracting the boom device is performed. The fork can be moved horizontally without performing the same operation at the same time, and even if the shape and weight of the conveyed goods are different, the forks can be held horizontally when the conveyed goods are lifted and moved. It is an object of the present invention to provide a hanger fork device capable of performing a cargo handling operation.

[0011]

SUMMARY OF THE INVENTION A hanger fork device according to the present invention is a hanger fork device attached to the tip of a boom device of a crane. And a hanging device comprising a connecting saddle, a cylinder device, and an arm movable back and forth with respect to the saddle by the cylinder device.

At the time of cargo handling work, a boom device
The hanger fork device is moved to a position where the tip of the fork approaches the pallet on which the conveyed goods are loaded, the fork is inserted into the pallet, the pallet is lifted and moved, and the pallet is removed from the pallet.

In the process of inserting a fork into the pallet,
The tip of the fork approaches the pallet with the arm moved rearward, and then the arm is advanced by the cylinder device along the connecting saddle. Then, the fork moves horizontally and is inserted into the pallet.

In the process of lifting and moving the conveyed object, the boom device is moved before lifting, and the saddle is positioned on a vertical line passing through the center of gravity of the hanger fork device on which the conveyed object is loaded by the cylinder device. This allows the fork to move while holding the pallet horizontally, so that the pallet is lifted and moved, and placed on a predetermined position.

In the process of extracting the fork from the pallet, the arm is moved backward along the connecting saddle by the cylinder device from the state where the arm has moved forward. Then, the fork moves horizontally and is taken out of the pallet.

As described above, in the process of inserting the fork into the pallet or extracting the fork from the pallet, the fork can be moved horizontally without performing the operation of extending and retracting the boom device and the operation of raising and lowering at the same time.
Even if the shape and weight of the goods are different, it is possible to hold the fork horizontally when lifting the goods,
The handling operation is easy and the cargo handling work can be performed safely.

In the hanger fork device, the piston rod of the cylinder device is pivotally attached to the rear end of the arm, arm forward pulleys are provided on both left and right sides of the ground portion of the cylinder tube of the cylinder device, and the tip of the cylinder tube of the cylinder device is provided. Arm is provided with a pulley for arm reversing, a rope hook is provided on the saddle, and a wire rope for arm reversing, which is led forward by hooking the central portion on the rope hooking member, is wrapped around the pulley for arm reversing, and both ends are behind the arm. It is configured so that it is fixed to the ends, the center part is hooked on the rope hooking member, the arm advance wire rope guided to the rear is hung around the arm advance pulley, and both ends are fixed to the front end of the arm respectively. Then, the moving distance of the arm with respect to the length of expansion and contraction of the cylinder device is doubled, so that quick movement is possible, and a short stroke cylinder can be used. You can have a larger moving range.

Further, when the post is composed of a lower post and an upper post which is fitted to the lower post so as to be slidable up and down and can be fixed at a predetermined height, the size of the conveyed article and the height of the ceiling of the work place can be improved. This is convenient because the height can be changed in the case where there is a restriction due to the above.

[0019]

FIG. 1 is a side view of a hanger fork device according to an embodiment of the present invention in which a fork is inserted into a pallet, FIG. 2 is a rear view of the hanger fork device, and FIG. 3 is a hanging device. FIG. 4 is a sectional view taken along line AA of FIG. 3, FIG. 5 is an explanatory view of the configuration of a cylinder device,
6 is an explanatory view of a state in which the wire rope is wound around, FIG. 7 is an explanatory view of a cargo handling operation using the hanger fork apparatus, FIG. 8 is an explanatory view of a state before the fork is inserted into the hanger fork apparatus, and FIG. 9 is a saddle position. FIG. 10 and FIG. 11 are explanatory diagrams of a state in which a slant is applied to a hanger fork device to lift the object, and FIG. 12 is an explanatory view of a state in which a conveyed object in an unbalanced load state is lifted.

The hanger fork device 1 includes a post 4 standing on a beam 31 to which the fork 3 is fixed.
Is provided at the upper end portion thereof with a hanging device 2 including a saddle 5 for connection, a cylinder device 6 and an arm 7.

The fork 3 has a rear end fitted to a beam 31 having a rectangular cross section, and is fixed by adjusting the opening width L on the left and right in accordance with the width of the corresponding insertion opening of the pallet 11.

The post 4 comprises a lower post 41 and an upper post 42 which is fitted to the lower post 41 so as to be vertically slidable. Pin holes 43 and 44 are formed in the lower post 41 and the upper post 42, respectively. The fixing pin 45 can be fixed at a predetermined height by inserting the fixing pin 45. On the front face of the post 4, an inclined protection fence 46 for supporting the back face of the conveyed article 17 is provided.

The hanging device 2 has a rectangular tubular saddle 5 slidably fitted inside a rectangular tubular arm 7 having a rectangular cross section and a length longer than the fork 3. The cylinder device 6 is disposed so as to pass therethrough, and the rear end of the arm 7 is fixed to the upper post 42.

A slit 7 is provided at the center of the upper and lower surfaces of the arm 7.
1 and 72 are formed, and a bracket 51 is provided above the saddle 5 so as to protrude upward from the slit 71. The bracket 51 includes a rotator 18.
Is provided with a saddle pin hole 52 for connection to the vehicle.
A rope hooking member 53 is provided inside the saddle 5, and a hydraulic hose stopper 55 is provided in the front.

The cylinder device 6 has a piston rod 61 pivotally attached to the rear end of the arm 7 with a mounting pin 66. Arm forward pulleys 63 are attached to the left and right sides of the ground portion of the cylinder tube 62 of the cylinder device 6 by pulley pins 67, and arm backward pulleys 64 are integrally formed on the left and right sides of the distal end of the cylinder tube 62. Drum 65
Are attached by a drum shaft 68.

The center portion of the arm backward wire rope 21 is hooked on the rope hooking member 53 of the saddle 5, and the arm backward wire rope 21 is guided forward and is wrapped around the arm backward pulley 64. Both ends are fixed to the rear end of the arm 7 by adjusting stoppers 22, respectively. The rope hooking member 53 has an arm advance wire rope 23.
Of the arm 7 is hooked at the center thereof, and the arm advance wire rope 23 is guided backward and is wrapped around the arm advance pulley 63, and both ends are fixed to the front end of the arm 7 by adjusting clasps 24, respectively. .

At the front end of the piston rod 61 of the cylinder device 6, a hydraulic hose connecting member 69 is provided.
The base 26 at one end of the hydraulic hose 25 is connected to the hydraulic hose connecting member 69. The hydraulic hose 25 is guided forward, is wrapped around a drum 65, is led out through a hydraulic hose stopper 55 of the saddle 5, and is drawn out to the upper end.
Is connected to an operating hydraulic line (not shown) on the boom device 90 side.

The degree of extension of the arm backward wire rope 21, the arm forward wire rope 23, the hydraulic hose 25 and the like provided inside the arm 7 is determined by the slit 7 of the arm 7.
Visual inspection can be performed from 1, 72, and adjustment stopper 2 if necessary.
2, 24, adjust with hydraulic hose stopper 55.

As shown in FIG. 7, the hanger fork device 1 is used by connecting a bracket 51 of a saddle 5 to a rotator 18 suspended on a tip boom 92 of a boom device 90 of a crane 9 by a connecting pin 19. Is done.

The crane 9 shown in FIG. 7 is a known folding crane mounted on the truck 12 and includes a pivotable column 91 and a boom device 90 capable of bending and expanding and contracting.
It has.

When the pallet 11 loaded with the articles 17 is transported from the bed 13 of the truck 12 to the second floor 15 of the building 14, the column 91 is turned, the boom device 90 is directed backward, and the rotator 18 is rotated. The fork 3 of the hanger fork device 1 faces forward, and the tip of the fork 3 is brought close to the pallet 11. At this time, the cylinder device 6 has been extended, and as shown in FIG.
Is in a state of being moved rearward with respect to the saddle 5.

Then, when the cylinder device 6 is reduced, the arm 7 moves forward along the saddle 5, and the fork 3 moves in a horizontal state and is inserted into the pallet 11 as shown in FIG.

When the fork 3 is inserted into the pallet 11, the boom device 90 is moved and the cylinder device 6 is moved.
, The saddle 5 is moved forward with respect to the arm 7, and as shown in FIG. 9, the connecting pin 19 is placed on the vertical line of the center of gravity G of the hanger fork device 1 on which the load 17 is loaded.
Adjust the position of saddle 5 so that it comes. At this time, the fork 3 is kept from moving with respect to the pallet 11.

Since the fork 3 can hold the pallet 11 horizontally, the conveyed object 17 is lifted by the crane 9, the column 91 is turned, the boom device 90 is directed toward the building 14, and the rotator 18 is rotated. Then, the fork 3 of the hanger fork device 1 faces forward, the pallet 11 is placed on the second floor 15, and the saddle 5 moves the boom device 90 and reduces the size of the cylinder device 6.
The arm 7 is moved to the rear end as shown in FIG.

In the process of extracting the fork 3 from the pallet 11, the cylinder device 6 is extended to move the arm 7 backward along the saddle 5 from the state where the arm 7 has moved forward as shown in FIG. Then, the fork 3 moves in a horizontal state and is extracted from the pallet 11.

As described above, in the process of inserting the fork 3 into the pallet 11 or extracting the fork 3 from the pallet 11, the fork 3 can be moved horizontally without performing the operation of extending and retracting the boom device 90 and the operation of raising and lowering at the same time. In addition, since the fork 3 can be held horizontally when the conveyed object 17 is lifted and moved even if the conveyed object 17 has a different shape or weight, the handling operation is easy and the cargo handling operation can be performed safely.

As shown in FIG. 11, depending on the conveyed product 17, it may be better to tilt the hanger fork device 1 a little backward and to support it with the fork 3 and the inclined protection fence 46.

At this time, the fork 3 is
After that, the boom device 90 is moved and the cylinder device 6 is extended, so that the saddle 5
Is moved forward, as shown in FIG. 10, the saddle 5 is positioned so that the connecting pin 19 comes forward of the vertical line of the center of gravity G of the hanger fork device 1 on which the goods 17 are loaded. When the hanger fork device 1 is lifted in this state, the hanger fork device 1 is inclined.

Further, as shown in FIG. 12, when lifting the load 17E in an eccentric load state, the saddle 5 is moved to near the front end of the arm 7. Since the arm 7 is longer than the fork 3 and the moving range of the saddle 5 is larger than the actual use length of the fork 3, the load 17 </ b> E in an eccentric load state whose center of gravity is near the tip of the fork 3 can also be lifted. it can.

As described above, in the process of inserting the fork 3 into the pallet 11 or extracting the fork 3 from the pallet 11, the fork 3 can be moved horizontally without simultaneously performing the operation of extending and retracting the boom device 90 and the operation of raising and lowering it. In addition, since the fork 3 can be held horizontally when the conveyed object 17 is lifted and moved even if the conveyed object 17 has a different shape or weight, the handling operation is easy and the cargo handling operation can be performed safely.

In the hanger fork device 1, the piston rod 61 of the cylinder device 6 is pivotally attached to the rear end of the arm 7,
Arm forward pulleys 63 are provided on the left and right sides of the ground portion of the cylinder tube 62 of the cylinder device 6, and arm backward pulleys 64 are provided at the tip of the cylinder tube 62 of the cylinder device 6. The saddle 5 is provided with a rope hooking member 53, and the arm backward wire rope 21, which is hooked at the central portion of the rope hooking member 53 and guided forward, is wrapped around the arm backward pulley 64, and both ends are behind the arm 7. The wire rope 23 for arm advance, which is hooked on the rope hooking member 53 at the center and guided to the rear, is wound around the pulley 63 for arm advance, and both ends are fastened to the front end of the arm 7 respectively. Assuming that the length of expansion and contraction of the cylinder device 6 is S, the moving distance of the arm 7 is twice as long as 2S, which enables quick movement,
The movement range can be increased by using a short stroke cylinder.

Further, since the post 4 is composed of the lower post 41 and the upper post 42 which is fitted to the lower post 41 so as to be slidable up and down and can be fixed at a predetermined height, the size of the conveyed article, This is convenient because the height can be changed when there is a restriction due to the height of the ceiling of the work place or the like.

[0043]

As described above, the hanger fork device of the present invention performs the troublesome operation of simultaneously extending and retracting the boom device and raising and lowering the same during the process of inserting the fork into the pallet or extracting the fork from the pallet. The fork can be moved in a horizontal state without performing. In addition, even if the shape and weight of the conveyed object are different, the fork can be held horizontally when the conveyed object is lifted and moved, the collapse of the load can be prevented, the handling operation is easy, and the cargo handling operation can be performed safely. It is also suitable for remote control.

The piston rod of the cylinder device is pivotally attached to the rear end of the arm, pulleys for arm advance are provided on both left and right sides of the ground portion of the cylinder tube of the cylinder device, and the arm retreat is provided at the tip of the cylinder tube of the cylinder device. A pulley is provided, a rope hooking member is provided on the saddle, and a wire rope for arm reversing, which is led forward by hooking the center portion on the rope hooking member, is wrapped around the arm retreating pulley, and both ends are respectively stopped at the rear end of the arm. The arm device is configured so that the arm wire pulling arm is led to the rear by hooking the central portion on the rope hooking member and wrapped around the arm pulley, and both ends are fixed to the front end portion of the arm, respectively. Since the movement distance of the arm with respect to the extension length is doubled, quick movement is possible, and the movement range is increased by using a short stroke cylinder. It is possible.

When the post is composed of a lower post and an upper post which is fitted to the lower post so as to be slidable up and down and can be fixed at a predetermined height, the size of the article to be conveyed, the height of the ceiling of the work place, etc. In the case where there is a restriction, the height can be changed, which is convenient.

[Brief description of the drawings]

FIG. 1 is a side view of a hanger fork device according to an embodiment of the present invention, in which a fork is inserted into a pallet.

FIG. 2 is a rear view of the hanger fork device.

FIG. 3 is an explanatory diagram of a configuration of a hanging device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an explanatory diagram of a configuration of a cylinder device.

FIG. 6 is an explanatory diagram of a state in which a wire rope is wound around.

FIG. 7 is an explanatory diagram of a cargo handling operation using the hanger fork device.

FIG. 8 is an explanatory view of a state before the fork is inserted in the hanger fork device.

FIG. 9 is an explanatory diagram of a state in which the saddle is adjusted and lifted.

FIG. 10 is an explanatory diagram of an operation of imparting a slant to the hanger fork device and lifting the hanger fork device.

FIG. 11 is an explanatory view of an operation of imparting a slant to the hanger fork device and lifting the hanger fork device.

FIG. 12 is an explanatory diagram of an operation of lifting a conveyed object in an eccentric load state.

FIG. 13 is an explanatory view of a conventional hanger fork device.

FIG. 14 is an explanatory view of a conventional hanger fork device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hanger fork device 2 Hanging device 3 Fork 4 Post 5 Saddle 6 Cylinder device 7 Arm 9 Crane 11 Pallet 12 Truck 13 Packing bed 14 Building 15 Second floor floor 17 Conveyed material 18 Rotator 19 Connecting pin 21 Arm backward wire rope 23 Arm forward Wire rope 31 beam 41 lower post 42 upper post 43 pin hole 44 pin hole 45 fixing pin 46 slope protection fence 51 bracket 53 rope catching member 61 piston rod 62 cylinder tube 63 arm forward pulley 64 arm backward pulley 65 drum 71 slit 72 Slit 90 Boom device 91 Column 92 Tip boom

Claims (3)

[Claims] 1. A hanger fork device attached to a tip of a boom device of a crane, comprising a connecting saddle, a cylinder device, and a cylinder device provided at an upper end of a post erected on a beam to which the fork is fixed. A hanger fork device provided with a hanging device having an arm that can move back and forth with respect to the saddle. 2. A piston rod of a cylinder device is pivotally attached to a rear end portion of an arm, arm forward pulleys are provided on left and right sides of a ground portion of a cylinder tube of the cylinder device, and an arm is provided at a tip end of the cylinder tube of the cylinder device. Provide a reverse pulley, provide a rope hooking member on the saddle, hook the center of the rope hooking member, guide the arm forward, wrap the wire for backward arming around the pulley for arm backwards, and attach both ends to the rear end of the arm. Each arm is fixed, and a wire rope for arm advance, which is guided to the rear by hooking a central portion on a rope hooking member, is wrapped around an arm pulley, and both ends are respectively fastened to a front end of the arm. Item 2. The hanger fork device according to Item 1. 3. The post according to claim 1, wherein the post comprises a lower post, and an upper post which is fitted to the lower post so as to be vertically slidable and can be fixed at a predetermined height. Hanger fork device.