JPH08133694A - Forklift for carrying cylindrical material - Google Patents

Abstract

PURPOSE: To efficiently pile the cylindrical material on the floor with a slope by suspending a frame body, which can be oscillated around a horizontal axis, from a moving body, which can be freely moved in the fore and aft direction, through a connecting rod, and providing a C-shape hook in this frame body, and providing a posture adjusting device for adjusting the posture of the C-shape hook. CONSTITUTION: A moving body 7, which is supported for guide by a guide rail 5 provided in a carriage 4, which can be freely elevated, and which can be moved in the fore and aft direction, is provided, and a rotary shaft 13 is provided in this moving body 7. A frame body 24, which can be oscillated around the horizontal axis, is suspended from the lower end of the rotary shaft 13 through a connecting rod 20, and a C-shape hook 27 is provided in this frame body 24. A posture adjusting cylinder 34 for adjusting posture of the C-shape hook 27 is provided between the connecting rod 20 and the frame body 24. At the time of lifting a cylindrical material 41 with the C-shape hook 27, a piston rod 37 of the posture adjusting cylinder 34 is prolonged, and the hook 28 is adjusted horizontal. The cylindrical material 41 is thereby stably held, and a fall-out thereof is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift for transporting tubular products such as steel coils for transporting, stacking and unloading tubular products.

[0002]

2. Description of the Related Art Conventionally, for example, the one shown in FIGS. 13 to 16 has been used as a forklift for transporting a cylindrical object of this type. That is, a mast 61 is provided in the front part of the vehicle body 60, and a carriage 62 that is supported and guided by the mast 61 and is capable of moving up and down is provided. On the front of this carriage 62,
A rod-shaped ram 65 to be inserted into the inner hole 64 of the tubular object 63 is attached.

According to this, when transporting the cylindrical object 63,
After lowering the carriage 62, move the vehicle body 60 forward and
Insert the 65 into the bore 64 of the tubular member 63. And the carriage
By raising 62, the ram 65 rises and the tubular object 63 is lifted. After that, the vehicle body 60 is run to transport the tubular object 63 to the destination, and the carriage 62 is lowered to move the tubular object.
63 is placed on the floor, the car body 60 is moved backward, and the ram 65 is
It suffices to pull out from the inner hole 64 of

[0004]

However, in the above-mentioned conventional type, when stacking the tubular objects 63 in the hold 66, for example, since the side slope 67 of the hold 66 has the floor slope 68, the length of the floor slope 68 is long. After stopping the vehicle body 60 along the vertical direction,
63 was once placed on the floor 69, rolled by human power as shown by the phantom line in FIG. 13, and placed on the floor slope 68. Also, in FIG.
Another tubular object 63 shown in (b) on the tubular object 63 shown in (a)
When stacking the hangers, a hanger 70 is provided at the tip of the ram 65 and the wire 71 hung on the hanger 70
Then, the tubular body 63 is lifted up through the vehicle body 60 to advance the vehicle body 60, and the assistant 72 manually positions the tubular body 63 while changing the direction of the tubular body 63, and the auxiliary body 72 positions it on the tubular body 63 shown in (a). The tubular object 63 shown in (b) was wholesale.

As described above, when the cylindrical objects 63 are stacked on the floor sloped portion 68, an auxiliary member 72 is required and dangerous work is performed, so that more efficient stacking work cannot be performed.

The present invention solves the above problems, and an object of the present invention is to provide a forklift for transporting tubular objects which can efficiently stack the tubular objects on the floor slope portion without requiring an assistant. To do.

[0007]

In order to solve the above problems, a tubular object forklift according to the present invention is extended forward by a carriage that can be raised and lowered by being guided by a mast provided at a front portion of a traveling vehicle. A guide rail is provided, a movable body that is supported and guided by the guide rail and is movable back and forth is provided, and a drive device for forward and backward movement that moves the movable body back and forth is provided, and the movable body is rotatable about a vertical axis. A rotary shaft is provided, and a rotary drive device for rotating the rotary shaft is provided.
A frame body that is swingable about a horizontal axis is suspended from the rotary shaft through a connecting rod, and a C-shaped hook is provided on the frame body. A C-shaped hook is provided between the connecting rod and the frame body. A posture adjusting device for adjusting the posture of the robot is provided.

[0008]

According to the above construction, the traveling vehicle is moved forward to insert the C-shaped hook into the inner hole of the cylindrical object and raise the carriage. As a result, the C-shaped hook rises to lift the tubular object. Then, the traveling vehicle is obliquely opposed to the floor slope portion and stopped, and the moving body is moved forward along the guide rail, whereby the C-shaped hook moves forward and the tubular object becomes the floor slope portion. Reach above. Then, by rotating the rotating shaft, the C-shaped hook is rotated and the tubular object is changed from the oblique direction to the direction along the floor slope portion. After that, by lowering the carriage, the C-shaped hook is lowered and the cylindrical object is stacked on the floor slope portion in the normal direction. Then, by rotating the rotary shaft and rotating the C-shaped hook to move the traveling vehicle backward, the C-shaped hook can be pulled out from the inner hole of the cylindrical object.

When the cylindrical object is lifted by the C-shaped hook, the frame body swings around the horizontal axis according to the position of the center of gravity of the cylindrical object, and the C-shaped hook is tilted downward. You can get a balance. If it is left as it is, there is a risk that the tubular object will slide downward during transportation and fall off from the C-shaped hook. Therefore, the C-shaped hook can be adjusted to the horizontal attitude by the attitude adjusting device. As a result, the tubular object is stably held by the C-shaped hook, so that the tubular object can be prevented from falling off.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 5 and 6, a pair of left and right telescopic masts 3 are provided at the front part of the traveling vehicle 2 of the forklift 1, and between the telescopic masts 3 are supported and guided by the telescopic masts 3 to be lifted and lowered. The carriage 4 is provided. The lifting and lowering of the carriage 4 is performed by a lift cylinder (not shown).

As shown in FIGS. 1 to 3, a pair of left and right guide rails 5 extending forward are provided on the front surface of the carriage 4. Between these two guide rails 5, a movable body 7 supported by both guide rails 5 via guide rollers 6 and movable back and forth is provided. A front-rear movement cylinder 8 (an example of a front-rear movement drive device) for moving the moving body 7 is provided at the rear end portion of each of the guide rails 5, and a piston rod 9 of these cylinders 8 is provided.
Is connected to the moving body 7.

A rotary shaft 13 which is rotatable around a vertical axis 12 is inserted through the movable body 7. The upper end of the rotary shaft 13 projects above the moving body 7, and a sprocket 14 is attached to the upper end of the rotary shaft 13. As shown in FIG. 3, a pair of left and right rotation cylinders 15a and 15b (an example of a rotation drive device) for rotating the rotary shaft 13 are provided at the rear portion of the moving body 7. That is, a chain 17 is connected between the tips of the piston rods 16a, 16b of the cylinders 15a, 15b, and the chain 17 is wound around the sprocket 14.

The lower end of the rotary shaft 13 projects below the movable body 7, and a bracket 18 is attached to the lower end of the rotary shaft 13. The bracket 18 is formed in a box shape whose lower surface is open. As shown in FIGS. 1 and 2,
A pair of connecting rods 20 which are swingable around an upper horizontal axis 19 are attached to the bracket 18 via upper connecting pins 21. At the lower ends of these connecting rods 20, a frame body 24 which is swingable about a lower horizontal axis 23 via a lower connecting pin 22.
The front ends of are connected.

As shown in FIGS. 2 to 4, the frame body
24 is formed in a rectangular frame shape in a plan view, and a pair of C-shaped hooks 27 facing each other in the lateral direction are juxtaposed on both sides of the frame body 24. The upper ends of the C-shaped hooks 27 are connected to the frame body 24 via a mounting shaft 28 so as to be rotatable about a horizontal axis 29, whereby the two C-shaped hooks 27 are respectively positioned in the upper horizontal direction. The lower ends of the shaft 29 can be swung in directions toward and away from each other. A pair of rocking cylinders 30 for rocking the C-shaped hooks 27 are provided at the center of the frame body 24. The tips of piston rods 31 of these cylinders 30 are connected to the upper ends of the C-shaped hooks 27 via connecting plates 32. As shown in FIG. 1, a cushioning member 33 such as a rubber material is attached to the inside of the C-shaped hook 27.

Further, as shown in FIGS. 1 and 4, a pair of attitude adjusting cylinders 34 (an example of an attitude adjusting device) is provided at the rear end of the frame body 24 for adjusting each of the C-shaped hooks 27 into a horizontal attitude. ) Is swingably provided about a lower horizontal axis 36 via a lower connecting pin 35. These attitude adjustment cylinders
The tip of the piston rod 37 of 34 is the upper connecting pin 38
It is connected to the upper part of the connecting rod 20 via the so as to be rotatable relative to the upper horizontal axis.

The front-rear moving cylinders 8, the rotating cylinders 15a and 15b, the swinging cylinders 30, and the attitude adjusting cylinders 34 are each an operation lever provided in the driver's seat 40 of the traveling vehicle 2. (Not shown).

The operation of the above structure will be described below.
When transporting a tubular object 41 such as a steel coil, the carriage 4 is lowered as shown by the solid line in FIG. 5, the traveling vehicle 2 is moved forward, and the lower end portion of the C-shaped hook 27 is placed inside the tubular object 41. Hole
Insert in 42. Then, as shown by the phantom line in FIG. 5, by raising the carriage 4, the C-shaped hook 27 is raised and the tubular object 41 is raised. After that, the traveling vehicle 2 is run to transport the tubular object 41 to the destination, the carriage 4 is lowered to place the tubular object 41 on the floor, and the traveling vehicle 2 is moved backward to lower the lower end of the C-shaped hook 27. It suffices to pull out the portion from the inner hole 42 of the tubular object 41.

When the tubular member 41 is lifted as described above, as shown in FIG. 7, the piston rods 31 of both rocking cylinders 30 are previously extended so that the C-shaped hooks 27 can move horizontally. The two lower ends of the C-shaped hooks 27 come close to each other by swinging around the center 29 toward the opposite sides. In this state, by inserting the lower end portions of both C-shaped hooks 27 into the inner hole 42 of the tubular object 41, the heavy tubular object 41 can be lifted by using both C-shaped hooks 27.

Further, as shown in FIG. 8, by shortening the piston rod 31 of both swing cylinders 30, each C
The C-shaped hooks 27 swing about opposite sides of the horizontal axis 29, and the lower ends of the C-shaped hooks 27 are separated from each other. This makes it possible to attach two light tubular objects 41 to each C-shaped hook.
It can be lifted at once with 27. In addition, C-shaped hook 27
When the lower end portion of the tubular article 41 is inserted into the inner hole 42 of the tubular article 41, the buffer member 33 comes into contact with the front surface of the tubular article 41 as shown in FIG. It can prevent sticking.

Further, as shown in FIG. 9, when the tubular object 41 is placed on the floor slope portion 43, the tubular object 41 is lifted by the C-shaped hook 27 and then traveled with respect to the floor slope portion 43. The car 2 is diagonally opposed and stopped. Then, as shown by the phantom line in FIG. 1, the piston rod 9 of the cylinder 8 for forward and backward movement is extended to move the moving body 7 forward along the guide rail 5, so that as shown by the phantom line in FIG. The C-shaped hook 27 moves forward, and the tubular member 41 reaches above the floor slope portion 43. Then, as shown in FIG. 3, by extending the piston rod 16a of one of the rotating cylinders 15a and shortening the piston rod 16b of the other rotating cylinder 15b, the rotary shaft is inserted via the chain 17 and the sprocket 14. As the solid line 13 rotates, the C-shaped hook 27 rotates as shown by the solid line in FIG. After that, by lowering the carriage 4, the C-shaped hook 27 is lowered and the tubular object 41 is placed on the floor slope portion 43 in the normal direction. While rotating the C-shaped hook 27 by rotating the rotary shaft 13,
As indicated by the phantom line in FIG. 10, by turning the steering wheel 2 and moving the traveling vehicle 2 backward, the C-shaped hook 27 is inserted into the hollow of the cylindrical object 41.
It can be pulled out from 42.

After the tubular article 41 is placed on the floor slope portion 43 in this manner, another tubular article 41 can be stacked on the tubular article 41 by the same procedure as described above. Therefore, the floor slope part
The cylindrical objects 41 can be stacked on the 43 in a safe and efficient manner without requiring an assistant.

When the tubular object 41 is lifted by the C-shaped hook 27 as described above, the frame body 24 is moved according to the position of the center of gravity of the tubular object 41.
Swings around the upper horizontal axis 19, and as shown in FIG. 11, the C-shaped hook 27 is balanced in a downwardly inclined posture. If it is left as it is, the tubular object 41 slides downward during transportation and C
Because there is a danger that it will fall out of the shaped hook 27,
As shown in FIG. 12, by extending the piston rod 37 of the attitude adjusting cylinder 34, the C-shaped hook 27 can be adjusted to a horizontal attitude. As a result, the tubular member 41 is stably held by the C-shaped hook 27, so that the tubular member 41 can be prevented from falling off.

In the above-described embodiment, the cylinder 8 is used as an example of the forward / backward drive device, and the cylinders 15a and 15b are used as an example of the rotation drive device.
Not limited to a and 15b, a motor or the like may be used. Further, in the above embodiment, a pair (two) of C-shaped hooks 27 are provided, but one may be provided.

In the above embodiment, the same type as a general forklift is used as the traveling vehicle 2, but the traveling vehicle 2
Alternatively, a vehicle such as a truck may be used.

[0025]

As described above, according to the present invention, the C-shaped hook is raised by moving the traveling vehicle forward to insert the C-shaped hook into the inner hole of the cylindrical object and raising the carriage. Objects are lifted. Then, the traveling vehicle is obliquely opposed to the floor slope portion and stopped, and the moving body is moved forward along the guide rail, whereby the C-shaped hook moves forward and the tubular object becomes the floor slope portion. Reach above. Then, by rotating the rotating shaft, the C-shaped hook is rotated and the tubular object is changed from the oblique direction to the direction along the floor slope portion. After that, by lowering the carriage, the C-shaped hook is lowered and the cylindrical object is placed on the floor slope portion in the normal direction. Then, by rotating the rotary shaft and rotating the C-shaped hook to move the traveling vehicle backward, the C-shaped hook can be pulled out from the inner hole of the cylindrical object.

After placing the tubular article on the floor slope portion in this manner, another tubular article can be stacked on the tubular article by the same procedure as described above. Therefore, the cylindrical objects can be stacked on the floor slope portion safely and efficiently without requiring an assistant.

When the tubular object is lifted by the C-shaped hook, the frame body swings around the horizontal axis according to the position of the center of gravity of the tubular object, and the C-shaped hook is tilted downward. You can get a balance. If it is left as it is, there is a risk that the tubular object will slide downward during transportation and fall off from the C-shaped hook. Therefore, the C-shaped hook can be adjusted to the horizontal attitude by the attitude adjusting device. As a result, the tubular object is stably held by the C-shaped hook, so that the tubular object can be prevented from falling off.

[Brief description of drawings]

FIG. 1 is a C of a forklift according to an embodiment of the present invention.
It is a partially cutaway side view of the attachment part of the shaped hook.

FIG. 2 is a front view of a mounting portion of a C-shaped hook.

FIG. 3 is a plan view of a mounting portion of a C-shaped hook.

FIG. 4 is a view on arrow AA in FIG.

FIG. 5 is a side view of the forklift.

FIG. 6 is a plan view of a forklift truck.

FIG. 7 is a front view showing the operation of the C-shaped hook.

FIG. 8 is a front view showing the operation of the C-shaped hook.

FIG. 9 is a schematic plan view of a forklift truck for explaining a procedure for stacking tubular objects on a floor slope portion.

FIG. 10 is a schematic plan view of a forklift truck for explaining a procedure for stacking tubular objects on a floor slope portion.

FIG. 11 is a side view showing the inclination of the C-shaped hook when the cylindrical object is lifted.

FIG. 12 is a side view of the C-shaped hook held in a horizontal posture by the posture adjusting device.

FIG. 13 is a schematic plan view of a forklift truck for explaining a procedure for stacking tubular articles on a floor slope portion in a conventional example.

FIG. 14 is a schematic front view of a forklift truck for explaining a procedure for stacking tubular articles on a floor slope portion in a conventional example.

FIG. 15 is a front view of tubular products stacked on a floor slope in a conventional example.

FIG. 16 is a schematic front view of a forklift truck for explaining a procedure for stacking tubular objects on a floor slope portion in a conventional example.

[Explanation of symbols]

 1 Forklift 2 Traveling vehicle 3 Telescopic mast 4 Carriage 5 Guide rail 7 Moving body 8 Cylinder for longitudinal movement (drive device for longitudinal movement) 12 Vertical axis 13 Rotating shafts 15a, 15b Cylinder for rotation (driving device) 19 Top horizontal Shaft center 20 Connection rod 24 Frame body 27 C-shaped hook 34 Posture adjustment cylinder (posture adjustment device) 41 Cylindrical object

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Daijiro Masuda 1 Nishinosu, Oita City, Oita Prefecture Nippon Steel Co., Ltd. Oita Works

Claims (1)

[Claims] 1. A carriage that is movable up and down by being guided by a mast provided at a front portion of a traveling vehicle is provided with a guide rail that extends forward, and a movable body that is supported and guided by the guide rail and is movable back and forth. A forward / backward drive device for moving the moving body back and forth is provided, a rotating shaft rotatable about a vertical axis is provided on the moving body, and a rotating drive device for rotating the rotating shaft is provided on the rotating shaft. , A frame body that is swingable around a horizontal axis is suspended through a connecting rod, and a C-shaped hook is provided on this frame body, and the posture of the C-shaped hook is adjusted between the connecting rod and the frame body. A forklift for transporting a cylindrical object, characterized by being provided with a posture adjusting device.