JPH0753191A - Step difference shift device for heavy article - Google Patents

Abstract

PURPOSE:To permit the shift of a heavy article in the horizontal direction, getting over a step difference, even at a place having a staircase or stage/ difference. CONSTITUTION:A step difference shift device for a heavy article consists of a table 1 for placing a heavy article, base board 2 which is positioned on the undersurface of the table 1 and permits the contact between the undersurface and the ground, lifting-up mechanism 3 for raising the table 1 from the base board 2, and the first, second, third and the fourth supporting shifting means 6-11 which are installed in a demountable manner on each side of the table 1 and equipped with the rollers 22-27 at the lower end. The second supporting shifting means 10 and 11 are constituted so as to adjust each length of the table 1 and the rollers 26 and 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step moving apparatus for moving a heavy object in a horizontal direction at a place with stairs or steps.

[0002]

2. Description of the Related Art Conventionally, a carrier device such as a forklift truck or a carriage having a caster on its lower surface has been often used for transporting heavy objects. A forklift truck can lift heavy items together with pallets and transport them in a warehouse or at a cargo handling site. Since it uses a power source, there is a feature that workers do not get tired. However, when using a forklift truck, there was a difference in the inner wheels, so it was only possible to drive on a site that had enough room to move freely and change direction. For this reason, there is a restriction that a forklift truck must be available in a warehouse or a cargo handling area with a large area.

Therefore, in a narrow place or a passage where a forklift truck cannot be operated, a truck with casters attached to the lower surface is used. In transporting heavy goods by this dolly, a heavy goods is placed on the dolly and the dolly is moved manually. This trolley does not lift and carry heavy objects by a large number of people, and therefore has the feature that even heavy objects can be moved without giving fatigue to workers.

As described above, conventionally, in that situation,
We used heavy equipment such as forklift trucks and carts to transport heavy items. However, depending on the condition of the passage and the characteristics of the building, it may not be possible to move heavy objects even with a dolly.

For example, in a building where there is no elevator and climbs and descends only by stairs, a forklift truck cannot move, and even a truck cannot move stairs. In such a situation, conventionally, a heavy load must be manually lifted by a large number of workers to move it upstairs or downstairs. Also,
Although not continuous like stairs, there are various steps on the floor of the building. Among them, if the step is several centimeters, it can be overcome by tilting the cart, but if the step is about several tens of centimeters, it becomes impossible to move the cart as it is. In such a case, similarly to the above, it is impossible to get over the step unless a heavy load is lifted by a large number of workers. In particular, in a place where there is not enough room to provide a slope on a step, it is necessary to rely on human power in any case, which is not the efficiency of the work and causes fatigue to the worker.

[0006]

As described above, mechanization such as a forklift truck can be achieved in a warehouse or a loading / unloading place having a large area, and a trolley can be used in a narrow place to carry heavy objects. there were. However, in a very limited and narrow place, or where there are stairs, it was not possible to lift heavy items up stairs or steps without the help of primitive human power. In this way, mechanization was promoted in order to save labor and modernize, but it was difficult to overcome mechanical obstacles such as stairs and steps. Even in such a situation, there has been a demand for development that can overcome stairs and steps by mechanical force without requiring workers.

[0007]

According to the present invention, a table on which a heavy object is placed, a base located on the lower surface of the table and in contact with the ground surface and the lower surface, and interposed between the table and the base. A lifting mechanism that can be expanded and contracted in the vertical direction, a first support moving means that is detachably attached to one side of the table, and a roller that can roll at the lower end of the mechanism, and a detachable mechanism that is attached to the other side of the table. A second supporting and moving means that is attached to the table and extends vertically up to about the height of the step and has a roller capable of rolling at its lower end, and detachably attached to the left and right sides of the table, respectively. It is an object of the present invention to provide a step moving device for heavy objects, which is characterized in that it is composed of third and fourth support moving means provided with rollers capable of rolling at the lower end.

[0008]

In the structure of the present invention, the lifting mechanism is interposed between the table and the base, and the lifting mechanism can lift the table from the position of the ground to the height of the step. Then, after the table is lifted, the moving means having the casters fixed to the lower portion is fixed to each periphery of the table. As the moving means, there are long ones with which the casters are in contact with the ground and short ones with which the casters are in contact with the upper surface of the step. After that, when the lifting mechanism is contracted, the base is stored on the lower surface of the table, and the table is supported by the height thereof by the moving means fixed around each table. Then, when the table is pushed horizontally toward the upper surface of the step, the table is moved by the rolling of the casters, and the table and the base are also moved to the step.

At this time, since the table is supported by the short-foot moving means fixed to the periphery, the long-foot moving means on the ground side is removed from the side surface of the table. Then, the table is supported on its four sides by moving means having short legs, and the table can be lightly moved on the upper surface of the step by the casters at the lower ends of the moving means. By sequentially performing such an operation, a heavy object can be placed on the table, and the step moving device can be moved together with the heavy object while overcoming the step. Therefore, even in a complicated place with stairs or steps in a building, it is possible to move heavy objects over the steps without burdening the worker. By performing the reverse operation of this procedure, it becomes possible to lower the heavy object from above the step to the ground.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, FIG. 1 is a perspective view of an entire heavy-weight step moving device showing a state in which moving means is fixed around each table and the table is lifted by a lifting mechanism, and FIG. 2 is a front view of the same. 3 is a side view showing the same as above, and FIG. 4 is a side view showing a state in which all the moving means are removed and the table is brought into contact with the base to reduce its height.

In the heavy object step moving apparatus of the present embodiment, the heavy object is placed on the flat rectangular table 1, and the lower surface of the table 1 is formed into an X shape by combining a pair of arms. A lifting mechanism 3 that can be expanded and contracted is connected, and a base 2 that makes contact with the bottom surface is connected to the lower ends of the arms of the lifting mechanism 3. The lifting mechanism 3 is vertically expanded and contracted by a hydraulic cylinder, and the operation of the lifting mechanism 3 allows the table 1 and the base 2 to be brought into contact with and separated from each other. In addition to the mechanism attached to the table 1, there is a hydraulic pressure generator 4 incorporating a hydraulic pump and a battery.
And a hydraulic cylinder in the lifting mechanism 3 are connected by a hydraulic hose 5 so that pressure oil can be supplied.

Mounting arms 6 and 7 can be detachably fixed to one of the long sides of the table 1 (on the upper right side in FIG. 1) with thumbscrews. The casters 12 and 13 are fixed to the.
The caster 12 has a roller 22 pivotally supported, and the caster 13 has a roller 23 pivotally supported.
The rollers 22 and 23 can contact the upper surface of the step and rotate. The mounting arms 6 and 7, the casters 12 and 13, and the rollers 22 and 23 form a first support moving means.

Further, mounting arms 10 and 11 can be detachably fixed to the other of the long sides of the table 1 (lower left side in FIG. 1) by thumbscrews, and the tips of the mounting arms 10 and 11 are attached. Long support rods 16 and 17 extending in the vertical direction are fixed to the lower surface. Adjusting screws 18 and 19 that move forward and backward in the lengthwise direction are respectively screwed into the lower ends of the support rods 16 and 17, and the adjusting screws 1
By rotating 8 and 19, the support rods 16 and 17 can be inserted into and pulled out from the support rods 16 and 17, and the height can be adjusted. A caster 20 is fixed to the lower end of the adjusting screw 18, a caster 21 is fixed to the caster 20, a roller 26 is pivotally supported on the caster 20, and a roller 27 is axially supported on the caster 21. I support it. The mounting arms 10 and 11, the support rods 16 and 17, the adjusting screws 18 and 19, the casters 20 and 21, and the rollers 26 and 27 form a second support moving means.

Mounting arms 8 and 9 are detachably attached to the left and right sides of the table 1 near the mounting arms 10 and 11 by thumbscrews, and the lower end surfaces of the mounting arms 8 and 9 are attached. Casters 14 and 15 are attached to each. This caster 14 has a roller 2
4 is rotatably supported, and the caster 15 is rotatably supported by a roller 25, so that the rollers 24, 25 can contact the upper surface of the step and rotate. The mounting arm 10, the caster 14, and the roller 24 form a third support moving means, and the mounting arm 11, the caster 15, and the roller 25 form a fourth support moving means.

Incidentally, the casters 12, 13, 14, 1
Rollers 22, 23, 2 respectively supported by 5
The lower ends of 4 and 25 are located below the upper surface of the table 1 by the same length.

Next, FIG. 5 shows the mechanism of the lifting mechanism 3 described above, and shows the configuration in which the table 1 is removed. The lifting mechanism 3 is composed of a link mechanism of arms 31 and 32, the center of which is rotatably connected by a pin 28, and two sets of the link mechanisms are arranged on the left and right respectively. Each arm 31 is arranged on the outer side, and a erection plate 29 is interposed between the inner lower ends (lower left side in FIG. 5) of both arms for reinforcement. Also,
Each arm 32 is arranged inside and both arms 32
A connecting body 39 is fixed between the opposite centers of the two, and a control plate 42 is interposed between the inner lower ends (lower right side in FIG. 5) of both arms 32 for reinforcement. With this configuration, the arms 31 on both sides are formed in an H shape by the erection plate 29, both of them are regulated so that they can rotate at the same time, and the inner arm 32 is formed in a ladder shape by the connection body 39 and the control plate 42. , Both are restricted so that they can rotate at the same time.

The lower end of each arm 31 is rotatably connected to one end of the base 2 (left side in FIG. 5) by a pin 33, and the upper end of each arm 32 is one end of the lower surface of the table 1 (see FIG. 5). The left side of the figure is rotatably connected by a pin 34. In addition, guide rails 35 that open inwardly in a U shape are fixed to the left and right in the length direction at positions opposite to the pins 33 on the base 2, and can freely roll inside each guide rail 35. The rollers 36 inserted in each arm 3
It is pivotally supported at the lower end of 2. Then, guide rails 37 opening in a U-shape toward the inside are fixed to the left and right in the length direction at positions opposite to the pins 34 on the table 1,
Roller 3 inserted inside each guide rail 37 in a rollable manner
Each of 8 is pivotally supported on the upper end of the arm 31.

With such a configuration, each set of arms 3
1, 32 form an X shape around the pin 28 and can be expanded or contracted. In this operation, the arm 31
Swings around the pin 33, and the arm 32 moves toward the pin 34.
It will swing around. At the same time as this operation,
The roller 38 pivotally supported on the upper end of the arm 31 is the guide rail 3
The roller 36 linearly moves inside the armature 7 and is axially supported by the lower end of the arm 32 and moves linearly inside the guide rail 35. With such a link mechanism, if the base 2 were placed on the ground, the table 1 would move vertically up and down as the arms 31 and 32 expand or contract.

A pair of levers 40 are fixed to the center of the connecting body 39 with a space therebetween.
A connecting rod 41 is attached between the tips of the. A cylinder rod of a hydraulic cylinder 30 is connected to the outer surface of each lever 40, and the lower end of the hydraulic cylinder 30 is connected to a erection plate 29 fixed between arms 31. The arm 31, the connection body 39, the lever 40,
A link mechanism is formed by the hydraulic cylinder 30 and the erection plate 29. In this link mechanism, the expansion and contraction of the hydraulic cylinder 30 acts to widen the distance between the erection plate 29 and the lever 40, and as a result, the link mechanism rotates. As a result, the arms 31 and 32 move in an X-shape about the pin 28.

Next, the operation of this embodiment will be described. The operation of the step moving device for heavy objects in the present embodiment is shown in FIGS.
A heavy object can be lifted in the order described with reference to FIGS. 8, 9 and 10 and in the order of the drawings. In this embodiment, when the heavy object A is moved to the position immediately before the stairs or steps of the building by a dolly or the like and lifted by using the step moving device of the present embodiment immediately before the stairs or steps. Explain.

First, with the mounting arms 6, 7, 8, 9, 10 and 11 of the step moving device removed from the table 1, the lifting mechanism 3 is vertically contracted (the state of FIG. 1). Then only table 1 is visible). Then, on the side surface of the table 1, the height of the folded table 1 and the upper end thereof are substantially the same,
The guide plates B whose surfaces are gently inclined are arranged close to each other. This guide plate B is used for assisting in moving a heavy object on the table 1 by the trolley, and the heavy object A placed on the trolley is mounted on the guide plate B together with the trolley in the direction C in FIG.
Then, the heavy object A is transferred from the dolly to the upper surface of the table 1.

Next, when the heavy object A is placed on the table 1, the guide plate B is removed from the table 1. In this state, when hydraulic pressure is generated from the hydraulic pressure generator 4 and pressure oil is supplied to the hydraulic cylinder 30 through the hydraulic hole 5, the hydraulic cylinder 30 extends, the cylinder rod is pushed out, and the lever 40 is rotated. . When the lever 40 rotates, the connector 3 fixed to the lever 40
9. The arm 32 is also rotated at the same time, and the arms 31 and 32 start to rotate relative to each other so as to expand in an X shape around the pin 28. Then, the rollers 36 move linearly in the guide rails 35, and the rollers 38 move linearly in the guide rails 37, so that the expanding action of the arms 31, 32 is restricted by the rollers 36, 38. In FIG. 7, the table 1 is lifted vertically in the D direction by the arms 31 and 32. Therefore, the heavy object A placed on the upper portion of the table 1 is lifted together with the table 1, and the pressure oil is supplied to the hydraulic cylinder 30 when the table 1 is lifted to a position slightly higher than the height of the step. And stop the table 1 at that position.

Next, the mounting arms 6 and 7 are fixed to one long side of the table 1, and the mounting arm 1 is mounted to the other long side of the table 1.
0 and 11 are fixed, and mounting arms 8 and 9 are fixed to the left and right short sides of the table 1 (state of FIG. 8). With this setting, the casters 12, 1 connected to the mounting arms 6, 7 are continuous.
The rollers 22 and 23 of No. 3 have almost the same height as the upper surface of the step, and the rollers 26 and 27 of the casters 20 and 21 continuous with the mounting arms 10 and 11 have a height capable of contacting the ground. The height position of the rollers 26 and 27 can be adjusted up and down. In this height adjustment, the adjusting screws 18 and 19 are rotated to retract the adjusting screws 18 and 19 from the support rods 16 and 17, respectively. It is done by pulling out. By this adjustment, the rollers 22, 2
3 is at a height that allows contact with the steps, and rollers 26, 2
7 is at a height that can contact the ground.

In this state, the pressure oil supplied from the hydraulic pressure generator 4 to the hydraulic cylinder 30 is reversed to pull the cylinder rod into the hydraulic cylinder 30. Therefore, the total length of the hydraulic cylinder 30 is reduced,
The reducing force is transmitted to the arm 32 via the lever 40 and the connection body 39, and acts so as to reduce the opening angle of the X-shape formed by the arms 31 and 32 about the pin 28.
Therefore, the distance between the table 1 and the base 2 can be narrowed, but the mounting arms 6, 7,
10 and 11 are fixed, and each caster 12, 13 and
Since the rollers 22, 23, 26, 27 of 20, 21 are respectively in contact with the ground on the step, the table 1 is held at the height. Instead, the pedestal 2 connected to the lifting mechanism 3 is raised, and the pedestal 2 is indicated by E in FIG.
It is pulled up in the direction and is stored so as to be in close contact with the lower surface of the table 1. In such a state as shown in FIG. 8, the table 1 and the heavy object A are casters 12, 13, 20, 2 and the like.
It is supported by 1 and held at a position slightly higher than the upper surface of the step.

Next, when the heavy object A and the table 1 are lifted in this way, the table 1 is moved in the direction F in FIG.
When the whole is pushed, the rollers 22, 23, 26, 27 roll on the ground or on the step, and with the light force, the heavy object A and the table 1
Can be moved. In this movement, the support rods 16 and 19 can move until they come close to the side surfaces of the step, and when the support rods 16 and 19 come into contact with the step, the table 1 is moved.
The rollers 24 and 25 on the casters 14 and 15 of the mounting arms 8 and 9 attached to both sides of the short side of the roller contact the upper surface of the step, respectively. Therefore, as shown in FIG. 8, the table 1 is held by the rollers 22, 23, 24, 25 and 26, 27.

When the table 1 moves on the step and the rollers 22, 23, 24 and 25 come into contact with the step as described above,
The table 1 can be held by the mounting arms 6, 7, 8, 9 without using the support rods 16, 19. Therefore, the mounting arms 10 and 11 are removed from the table 1 in the direction G in FIG.
The four corners can be held by the rollers 22, 23, 24 and 25 of 7, 8, and 9. Even in the state shown in FIG. 10, the table 1 has rollers 22, 23, 2
Since it is held by Nos. 4 and 25, when the table 1 is pushed in the H direction in the figure, the table 1 and the heavy object A are easily moved to the H position.
The heavy load A can be moved in the horizontal direction with a light force by the rolling of the rollers 22, 23, 24, 25 even when the heavy load A moves in the direction and moves on the step.

In the explanation of the operation of this embodiment,
Although the procedure for lifting the heavy object A from the ground to a step at a high position has been described, conversely, the heavy object A lifted on the step at a high position can be loaded and unloaded on the ground. In this case, contrary to the above, FIG. 10, FIG.
By performing the procedure of FIGS. 8, 7, and 6, the heavy object A on the step can be loaded and unloaded on the ground at a low position.

[0028]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, there is a step or stair in a narrow position or in a complicated place, and it is not possible to use a forklift truck or a dolly to move heavy objects over the step. Even if there is, it is possible to easily move over the step without depending on the human power of the worker. Therefore, even if a heavy object is lifted and moved, a large number of workers are not required and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a state in which a table of a step moving device for heavy objects, which is an embodiment of the present invention, is lifted.

FIG. 2 is a front view showing a state where the table of the step moving device for heavy objects according to the embodiment of the present invention is lifted.

FIG. 3 is a side view showing a state where the table of the step moving device for heavy objects according to the embodiment of the present invention is lifted.

FIG. 4 is a side view showing a state in which the table of the step moving device for heavy objects according to the embodiment of the present invention is brought close to the base and folded.

FIG. 5 is a perspective view for explaining in detail the structure of a lifting mechanism in a step moving device for heavy objects which is an embodiment of the present invention.

FIG. 6 is a perspective view showing a state in which a heavy object is placed with the table lowered in order to explain the operation of the embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a heavy object placed on a table is lifted in order to explain the operation of the embodiment of the present invention.

FIG. 8 is a perspective view showing a state in which a mounting arm is fixed around the table to explain the operation of the embodiment of the present invention.

FIG. 9 is a perspective view showing a state in which the table together with the heavy object is moved over the step to explain the operation of the embodiment of the present invention.

FIG. 10 is a perspective view showing a state in which a mounting arm having a longer leg than the table is removed in order to explain the operation of the embodiment of the present invention. 1 table 2 base 3 lifting mechanism 6 mounting arm 7 mounting arm 8 mounting arm 9 mounting arm 10 mounting arm 11 mounting arm 12 caster 13 caster 14 caster 15 caster 16 support rod 17 support rod 18 adjusting screw 19 adjusting screw 20 caster 21 caster 22 roller 23 roller 24 roller 25 roller 26 roller 27 roller 30 hydraulic cylinder 31 arm 32 arm

Claims (7)

[Claims] 1. A table on which a heavy object is placed, a base located on the lower surface of the table and in contact with the ground surface and the lower surface, and a lifting mechanism interposed between the table and vertically movable. , A first supporting and moving means detachably attached to one side of the table and provided with a roller capable of rolling at its lower end, and detachably attached to the other side of the table, and the height of the step is about the same. Second supporting and moving means extending vertically to the length of the table and provided with a roller capable of rolling at its lower end, and a roller capable of rolling at its lower end, which is detachably attached to each of the left and right sides of the table. A step moving device for heavy objects, comprising a third and fourth support moving means. 2. The first, third, and fourth support moving means include a mounting arm that is detachably mounted on a table and extends laterally, a caster fixed to the lower surface of the tip of the mounting arm, and a caster. 2. The step moving device for heavy objects according to claim 1, wherein the step moving device comprises a roller pivotally supported at a lower end. 3. The step moving device for heavy objects according to claim 1, wherein the rollers in the first, third and fourth support moving means are located at substantially the same horizontal height. 4. The second support moving means includes a mounting arm that is detachably mounted on the table and extends laterally, a support rod that is connected to a lower surface of the tip of the mounting arm and extends downward, and a support rod. It is composed of an adjusting screw that can be freely screwed into and out of the lower end of the adjusting screw to adjust its length, a caster fixed to the lower end of the adjusting screw, and a roller pivotally supported at the lower end of the caster. Item 1. A step moving device for heavy objects according to Item 1. 5. The step movement of a heavy object according to claim 1, wherein the lifting mechanism is composed of a link mechanism in which the center of a pair of arms is rotatably supported by a pin to form an X shape. apparatus. 6. The lifting mechanism has a lower end of one arm rotatably connected to a base with a pin, and an upper end of the other arm rotatably connected to a table with a pin, and the centers of both arms are X-shaped. It is rotatably connected with a pin so that it becomes a letter shape, the lower end of the other arm is engaged so as to move along a guide rail extending horizontally to the base, and the upper end of one arm is attached to the table. 6. The step moving apparatus for heavy objects according to claim 1, wherein the step moving apparatus is engaged so as to move along a horizontally extending guide rail. 7. The lifting mechanism is characterized in that a hydraulic cylinder is interposed between one arm and the other arm, and a pair of X-shaped combined arms are opened and closed by the action of expansion and contraction of the hydraulic cylinder. Claims 1, 5,
6. The step moving device for heavy objects according to 6.