JPH08133088A - Lifting carriage of round long object - Google Patents

Abstract

PURPOSE: To provide a lifting carriage, capable of doing the alignment of a round long work easily in a place where a crane is hard to enters. CONSTITUTION: Two connecting rods 21 and 21 are hung down from both brackets 5a and 5a of a ramp via springs 22 and 22, and a rocker frame 7 is suspended by these connecting rods 21. Then two free rolls 8 and 8 are additionally installed in this rocker frame 7. A circular long work W is rotated as in an arrow (1), and further these connecting rods 21 are inclined as in an arrow (3), whereby this circular. long work W is shifted right and left as in an arrow (2), and thus fine centering is carried out. With this, after the rough centering, this long work W is finely shiftable in all directions owing to each action of the springs and the connecting rods, so that the fine centering can be done easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift truck capable of easily aligning a circular elongated object in a place where a crane is difficult to enter.

[0002]

2. Description of the Related Art FIGS. 12 (a) and 12 (b) are diagrams for explaining movement of a conventional circular long object, for supporting a circular long object 101 such as a pipe or a column in a place where a crane is difficult to enter, for example, a frame 102. To attach to the 103, 103, the first and second chain blocks 104, 105 are set in front of and behind the circular elongated object 101, as shown in (a) of the related art. Specifically, the first chain block 104 is suspended from the eye plate 106 on the frame 102 side and suspends the front part of the circular elongated object 101 via the wire 107. Second
Similarly, the chain block 105 of FIG.

On the other hand, (b) shows auxiliary chain blocks (third and fourth chain blocks 108, 109). (A) The first chain block 104 and the long object 10
When the No. 1 is lifted, the third and fourth chain blocks 1
08 and 109 to adjust the position of the long object 101 in the left-right direction of the drawing, so that the eye plate 110 on the long object 101 side is adjusted.
Can be matched with the support 103 on the frame 102 side. Only the first chain block 104 (3rd, 4th)
As is well known, it is difficult to perform alignment (because the chain blocks 108 and 109 are not used).

Therefore, for attaching and detaching the conventional circular elongated object 101, it is preferable that the first and second chain blocks 104 and 105 and the third and fourth chain blocks 108 and 109 that assist them be a total of six. A chain block of two (2 + 2 × 2) units is required.

[0005]

That is, the conventional attachment / detachment technique using a chain block which is carried out in a place where the crane is difficult to enter requires a large number of chain blocks, wires, eye plates and sling personnel, resulting in a long working time. The burden on the operator was also heavy.
Therefore, an object of the present invention is to provide a lift truck that can easily align a circular elongated object in a place where it is difficult for a crane to enter.

[0006]

In order to achieve the above object, the present invention is directed to a bogie frame having a plurality of wheels, a lift table mounted on the bogie frame so as to be able to move up and down, and the lift table is raised and lowered. A circular shape consisting of an elevating means, a swing frame body that is swingably attached to the lift table vertically / horizontally / frontward and backward through a swing mechanism, and a free roll rotatably attached to the swing frame body. It constitutes a lift truck for long objects.

The swinging mechanism is arranged at almost four corners of the elevator, each of which has a lower surface abutting against the elevator and a connecting rod for connecting the elevator and the swing frame through the spring. And a through hole of the lifting table having a sufficiently large diameter so that the connecting rod passing therethrough can be moved in the radial direction.

Alternatively, the swinging mechanism includes two springs, which are arranged on the left and right in the approximate center of the elevator, and each of which connects a spring whose lower surface is in contact with the elevator and the elevator and the upper bearing box via the spring. Connecting rod, a swinging piece that is swingably attached to this bearing box through a pin and is coupled to the swinging frame, and a sufficiently large size so that the penetrating connecting rod can move in the radial direction. And a through hole of the lifting table having a diameter.

[0009]

[Function] "Rough centering" is carried out in which a circular long object is laterally moved to a desired place by an elevating carriage and is raised to a predetermined height by elevating means. Next, by moving the rocking frame vertically / horizontally / forward / backward, “main centering” of the circular elongated object is carried out.

By supporting the swing frame body with a spring, the swing frame body can be moved up and down, and by providing a large gap between the connecting rod and the through hole, the swing frame body can be moved laterally / forward and backward. To enable.

By supporting the swing frame body with a spring, the swing frame body can be moved up and down, and by providing a large gap between the connecting rod and the through hole, the swing frame body can be moved laterally / forward and backward. To enable. In addition, the rocking frame can be rocked by the bearing box and the pin.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a plan view of a lift truck for a circular elongated object according to the present invention. The lift truck 1 includes a truck frame 4 provided with a plurality of wheels 2, 2, 3, and 3 and a carriage frame 4 for raising and lowering the truck frame 4. Elevating table 5 freely attached, elevating means 6 for elevating and lowering the elevating table 5, a swinging frame body 7 swingably attached to the elevating table 5 via a swinging mechanism 20, and a circular length. Free rolls 8 ... (... indicates a plurality, the same applies hereinafter) rotatably attached to the swing frame 7 to support the scale W. In the figure, 11 is a connecting rod, 12 is a connecting hole, and 13 is a grip. By inserting a pin (not shown) into the connecting hole 12, a plurality of lifting carriages 1 and 1 can be connected to each other.

FIG. 2 is an exploded perspective view of a lift truck for a circular elongated object according to the present invention, in which wheels 2 are swivel wheels (for example, free wheels), and swivel and rotation are locked by a lock mechanism (not shown). can do. The wheel 3 is also a wheel that can be turned and can be locked only by turning with a lock mechanism (not shown). Pantograph link 15, on the upper surface of the bogie frame 4,
15 is pin-locked, and this pantograph link 15,1
The elevating means 6 raises and lowers 5. This pantograph link 1
.. extend from four corners of the lifting table 5 which are pin-locked to the upper portions of the rocking frames 5 and 15, and a rocking mechanism 20 including a connecting rod 21 and a spring 22 and the like moves the rocking frame 7 to the bracket 5a. Support the bracket 7a. The rocking frame 7 is a so-called double frame, and has free rolls 8 ...

FIG. 3 is a sectional view taken along line 3 of FIG.
0 is a spring 22 whose lower surface is in contact with the lifting table 5, a connecting rod 21 that penetrates the lifting table 5 and the swing frame 7 via the spring 22, and the connecting rod 21 that penetrates moves in the radial direction. And a through hole 5b of the lifting table 5 having a sufficiently large diameter so as to be possible. 23 and 23 are nuts,
24 and 24 are lock nuts, and 25, 25 and 25 are washers. FIG. 4 is a view taken in the direction of arrow 4 in FIG.
Reference numeral 20 indicates that the front and rear (right and left in the figure) free rolls 8 and 8 are disposed in the vicinity thereof, and. The through holes 5b, 5b of the lifting table 5 are shown to have a sufficiently large diameter.

The operation of the lift truck for the circular elongated object described above will be described below. FIG. 5 is a side view of the lift truck. For example, a circular elongated object W indicated by a solid line is placed on the lift truck 1 by a crane (not shown). Specifically, it is placed on four free rolls 8 ... By pulling the connecting rod 11, the lift truck 1 is pulled laterally to a predetermined place. When the circular elongated object W reaches a predetermined position, the wheels 2 and 3 are locked. The pantograph links 15 and 15 are activated to raise the circular elongated object W to the position of the imaginary line.

From this state, the swing mechanism 20 of the present invention exerts its power. FIG. 6 is an explanatory view of the operation of the lifting truck of the present invention in the truck cross-section direction. When the eye plate W1 attached to the circular elongated object W is fixed to the support 27 by the pin 28, first, the free roll 8 ... The circular elongated object W is rotated as shown by the arrow by the free rotation action. Then, the circular elongated object W is moved in the direction of the arrow as much as necessary. That is,
In the swinging mechanism 20, the connecting rod 21 swings in the range of the arrow starting from the upper surface of the spring 22 (during this swinging, the spring 22 is also displaced to the left and right toward the top, so that the swinging center is the lift table as shown in the figure. However, the shape of the change is not limited to this, and the connecting rods 21 and 2 are within the range of the through holes 5b and 5b.
1 can move horizontally. The same applies below. ) Is characterized.
Therefore, the circular elongated object W can be easily moved "left and right" by the pushing action of the operator.

Further, the springs 22 ... Contract until the weight of the circular elongated object W is balanced. From this state, the elastic member of the spring 22 can be utilized to move the circular elongated object W relatively lightly “up and down”.

FIG. 7 is an explanatory view of the operation of the lifting carriage of the present invention in the longitudinal direction of the carriage. For example, if the eye plate W1 is still displaced with respect to the support 27 as shown in the figure,
By pushing the circular elongated object W, it can be easily moved in the arrow direction. The connecting rod 21 starts from the upper surface of the spring 22.
Is swinging in the range of the arrow. Therefore, the circular elongated object W can be easily moved "back and forth" by the pushing action of the operator.

Therefore, according to the lift truck 1 of the present invention, the wheels 2, 2, 3, 3 are rotated to achieve "coarse centering" of the circular elongated object W in plan view, and the pantograph link. 1
At 5, 15, "coarse centering" in the height direction is achieved, and thereafter, by using the swinging mechanism 20 ..., Final "main centering" of the circular elongated object W can be performed.

The connecting rod 21 of this embodiment may be changed to a wire or a chain. Then, the amount of adjustment in the horizontal direction can be doubled.

FIG. 8 is an exploded perspective view of a lift truck according to another embodiment of the present invention. The lift truck 1A has wheels 2, 2, 3, 3.
3, the front and rear connecting holes 12, 12, grips 13, 1
A bogie frame 4 provided with the connecting rods 11 and 3 with the 3; an elevating table 5A supported via the elevating means 6 and the pantograph links 15 and 15; and two rocking mechanisms 30 and 30 on the elevating table 5A. The swing frame body 7 is supported via the swing frame body 7.
Four free rolls 8 ... Are attached to the swing frame body 7.

FIG. 9 is a swing mechanism view of a lift truck according to another embodiment of the present invention. The swing mechanism 30 is inserted from below into a sufficiently large through hole 5b formed in the bracket 5a of the lift 5A. The connecting rod 31, a bearing box 32 having a screw portion 32a that meshes with the tip of the connecting rod 31, a swinging piece 34 supported by the bearing box 32 via a pin 33, the bracket 5a and the bearing box 32. And a spring 35 that is interposed between and. The swing piece 34 is bolted to the bracket 7a of the swing frame body 7. The rocking frame body 7 is a pin 3
3 can be swung to the left and right in the drawing like a so-called "yajirobe", and the bearing box 32 can be moved forward and backward and left and right because the connecting rod 31 is tiltable.

FIG. 10 is an explanatory view of the operation of the other embodiment of the present invention in the longitudinal direction of the bogie, in which the rocking frame body 7 rocks as indicated by an arrow a due to the rotation of the pin 33 and the tilting of the connecting rod 31. To do. Incidentally. The swing range is limited by the stoppers 5c and 5c. FIG. 11 is an explanatory view of the operation of the other embodiment of the present invention in the cross section of the bogie. Since the swinging mechanisms 30, 30 can be tilted as indicated by arrows b, b, the circular elongated object W moves as indicated by arrow c. You can 10 and 11, the circular elongated object W is movable in the longitudinal direction and the width direction.

[0024]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, a circular long object is laterally moved to a desired place by a bogie frame provided with a plurality of wheels, an elevating stand attached to the bogie frame so as to be able to move up and down, and an elevating means for elevating the elevating stand. Rough centering is performed to raise it to a predetermined height, and the main body is centered by moving the swing frame vertically / horizontally / forward / backward. It can move to a desired position with high accuracy. Therefore, according to the present invention, it is not necessary to prepare a plurality of chain blocks, a large number of workers is not required, and a specialized slinging staff is not required. Can be carried out.

According to a second aspect of the present invention, the swing mechanism comprises a connecting rod, a sufficiently large through hole, and a spring, and is capable of moving a circular elongated object up / down / left / right / backward satisfactorily with a very simple structure. This makes it easy to center a long circular object.

According to the third aspect of the present invention, since the swinging mechanism is composed of the connecting rod, the through hole and the spring which are sufficiently large, and the bearing box and the pin are also interposed, the circular elongated object is moved up / down / left / right / backward. In addition to being capable of swinging up and down, it is easy to center the long circular object.

[Brief description of drawings]

FIG. 1 is a plan view of a lift truck for a circular elongated object according to the present invention.

FIG. 2 is an exploded perspective view of a lift truck for a circular elongated object according to the present invention.

FIG. 3 is a sectional view taken along line 3 of FIG.

FIG. 4 is a view taken in the direction of arrow 4 in FIG.

FIG. 5 is a side view of a lift truck according to the present invention.

FIG. 6 is an operation explanatory view of a lifting truck according to the present invention in a truck cross-section direction.

FIG. 7 is an explanatory view of the operation of the lift truck of the present invention in the truck longitudinal direction.

FIG. 8 is an exploded perspective view of a lift truck according to another embodiment of the present invention.

FIG. 9 is a swing mechanism diagram of a lift truck according to another embodiment of the present invention.

FIG. 10 is an explanatory view of the operation in the longitudinal direction of the bogie of another embodiment of the present invention.

FIG. 11 is an explanatory view of the operation of another embodiment of the present invention in the cross section of the bogie.

FIG. 12 is a movement explanatory view of a conventional circular long object.

[Explanation of symbols]

1, 1A ... Elevating carriage for circular long objects, 2, 3 ... Wheels, 4 ...
Cart frame, 5, 5A ... Elevating table, 5b ... Sufficiently large through hole, 6 ... Elevating means, 7 ... Oscillating frame, 8 ... Free roll, 11 ... Connecting rod, 12 ... Connecting hole, 13 ... Grip, 1
5 ... Pantograph link, 20, 30 ... Swing mechanism, 21
... connecting rod, 22 ... spring, 31 ... connecting rod,
32 ... Bearing box, 33 ... Pin, 34 ... Oscillating piece, 35 ... Spring, W ... Circular elongated object, W1 ... Eye plate.

Claims (3)

[Claims] 1. A bogie frame provided with a plurality of wheels, a lift table mounted on the bogie frame so as to be able to move up and down, an elevating means for elevating the lift table, and a vertical movement mechanism for the elevating table via a swinging mechanism. / Lifting cart for a circular elongated object including a swinging frame body that is swingably mounted to the left / right / front / back and a free roll that is rotatably mounted on the swinging frame body to support the circular elongated object. . 2. The swing mechanism is arranged at substantially four corners of a lift, each of which has a spring whose bottom surface abuts the lift.
A connecting rod that connects the elevator and the swing frame through the spring, and a through hole of the elevator that has a diameter sufficiently large so that the penetrating connecting rod can be moved in the radial direction,
A lift truck for a circular elongated object according to claim 1, wherein 3. The swing mechanism comprises two springs, one on the left and one on the right in the center of the lift, each of which has a spring whose lower surface abuts on the lift and the lift and the upper bearing box via the spring. A connecting rod to be connected, a swinging piece that is swingably attached to this bearing box via a pin and is coupled to the swinging frame, and a connecting rod that has penetrated through it is sufficiently movable in the radial direction. The lift truck for a circular elongated object according to claim 1, characterized in that the lift truck has a large diameter through hole of the lift.