JPH079672U - Pneumatic levitation trolley - Google Patents

Abstract

(57) [Summary] [Purpose] Without impairing the aesthetics of the floor surface and without labor.
Provide a dolly that can carry products and the like with good operability. [Structure] A trolley in which a handle 12 is provided on a gantry 1 which is supported via wheels 2 and carries a transported object,
A skirt portion 3 for partitioning the closed space 4 between the lower surface and the floor surface is mounted on the entire circumference of the gantry 1, and an air pressure generator 5 for supplying pressurized air to the closed space 4 of the skirt portion 3 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pneumatic levitation trolley used for transporting and moving parts, products, etc. on a flat floor such as a warehouse or a factory.

[0002]

[Prior art]

 In recent years, factory automation has become widespread, and in factories and warehouses, the introduction of automatic carrier trucks has promoted the automation and labor saving of parts and products.

However, since this kind of automatic carrier truck is self-propelled on a predetermined route by computer control, it is not practical to automate all the carrier work by this, and a hand-operated auxiliary type is used. Dolly is used. In places where automation is not advanced in small factories, warehouses, etc., hand-held carts are used as a convenient transportation means. A hand-held trolley is an inexpensive and easy-to-carry means because it has a simple structure in which wheels are mounted on a pedestal for loading luggage.However, when the weight of the load is large, it requires a considerable amount of effort to push the trolley. And On the other hand, in recent years, in order to reduce such labor, electric or engine-driven boarding type carrier trucks have been used in recent factories.

[0004]

[Problems to be solved by the device]

 However, while the conventional hand-pushed trolley is extremely convenient and convenient, it requires a considerable amount of labor when handling heavy objects. In particular, a boarding trolley with a power source requires a certain amount of skill to operate, and it is difficult for women to operate.

In addition, in recent factories, as a part of quality control of products and improvement of environment maintenance, floors are beautifully painted with a resin paint or the like, and wax or the like is top-coated and polished. For this reason, there were problems with floor maintenance, such as when the trolley was used, the floor surface was contaminated by the wheels, and in some cases the wheels were dragged to scratch the floor surface. Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional technology, to carry a gravitational object without labor, and not to impair the aesthetics of the floor surface of a factory, etc. It is intended to provide a pneumatic levitation type trolley that contributes to the efficiency of the transportation work of products and the like.

[0006]

[Means for Solving the Problems]

 To achieve the above object, the present invention relates to a trolley in which a handle is provided on a gantry that is supported via wheels and on which a load is loaded, and a skirt that divides a closed space between a bottom surface of the gantry and a floor surface. The parts are attached to the entire circumference of the gantry, and an air pressure generator for supplying pressurized air to the closed space of the skirt is provided. In the above structure, an exhaust pipe communicating with the closed space of the skirt portion may be incorporated in the handle, and an open valve may be provided in this exhaust pipe. Further, in the above configuration, the flow rate of air supplied to the closed space of the skirt is detected, and when the flow rate exceeds or decreases below a certain flow rate, the supply flow rate of the air pressure generator is automatically adjusted. You can also

[0007]

[Action]

 According to the present invention, the wheels of the pedestal are slightly lifted from the floor due to the static pressure of the air discharged from the air pressure generator into the closed space of the skirt. In this floating state, almost no frictional resistance is generated between the floor and the floor surface, so the worker simply pushes with the handle of the dolly and walks while pushing the trolley, and the trolley moves in that direction. It is also extremely easy to operate left and right. On the other hand, if the air pressure generator is stopped or the open valve is opened, the pressure in the closed space will drop and the levitation of the dolly will stop, so that it is possible to carry the cargo by hand like a normal dolly. In addition, when there is a gap between the floor surface and the tip of the skirt, and the pressure in the closed space drops, the rotation speed of the blower is automatically increased, or a throttle valve installed on the blower suction side is installed. By opening it, the floating state is maintained.

[0008]

【Example】

 Hereinafter, an embodiment of a pneumatic levitation type carrier according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a pneumatic levitation type carrier according to an embodiment, FIG. 2 is a rear view, and FIG. 3 is a sectional view showing an internal structure. Reference numeral 1 represents the gantry 1 on which the cargo is mounted. The pedestal 1 is supported on the floor by at least wheels 2 arranged in front, back, left and right.

A skirt portion 3 is attached to the lower side of the gantry 1 so as to surround the skirt portion 3, and the closed space 4 formed between the lower surface of the gantry 1 and the floor surface is partitioned by the skirt portion 3. It has become. The skirt portion 3 is made of a material such as synthetic leather that is flexible and has no air permeability, and keeps the pressure of the closed space 4 in a substantially sealed state. On the other hand, an air pressure generator 5 is mounted on one side of the upper surface of the gantry 1. As shown in FIG. 3, the air pressure generating device 5 basically comprises an air filter 6, a blower 7, and a motor 8 for driving the blower 7. In the case of this embodiment, the motor 8 is configured to be supplied with power from a commercial AC power supply via a power supply line.

A duct 9 is formed inside the gantry 1 as a passage for the air discharged from the blower 7, and pressurized air is ejected from the outlet of the duct 9 toward the floor surface. In this embodiment, the flow rate of air flowing through the duct 9 is detected by a flow meter, and when the flow rate exceeds or decreases below a specified flow rate, the rotation speed of the motor 8 is automatically decreased or increased to discharge the blower 7 from the blower 7. Is controlled to be kept as constant as possible, thereby preventing the pressure drop in the closed space 4.

In the case of this embodiment, an exhaust pipe (not shown) communicating with the closed space 4 is incorporated in the handle 12, and an open valve 13 is attached to the end of the exhaust pipe. The open valve 13 is configured to be opened and closed by operating a grip 14 of the handle 12, for example.

Next, the operation of this embodiment will be described. As shown in FIG. 3, the compressed air discharged from the blower 7 is discharged from the duct 9 into the closed space 4 of the skirt portion 3, so that the static pressure of the air accumulated in the closed space 4 causes the wheel 2 to move to the floor surface. Then, the entire pedestal 1 floats slightly above the floor surface. In this levitated state, the frictional resistance is almost eliminated, so that the worker can move the dolly by simply pushing it with the handle 12 of the dolly and walking while walking, and at the same time operating the trolley in the left and right directions. , Very easy to do.

Further, since there is no contact with the floor surface, even when a heavy load is loaded, the floor surface can be kept beautiful without being dragged and damaged.

The air pressure in the closed space 4 becomes substantially equal to the atmospheric pressure by stopping the air compression motor 8 or opening the open valve 13 in the handle 12 while the motor 8 is still operating. As the levitation of the gantry 1 stops, the gantry 1 comes to be supported on the floor surface via the wheels 2. In this state, it can be used like a normal hand-held cart. The same operation can be performed by providing a throttle valve (not shown) on the discharge side of the blower 7 and throttle the throttle valve while the motor 8 is operating.

Next, another embodiment will be described with reference to FIG. 4 or FIG. FIG. 4 shows an embodiment in which a battery 15 is mounted as a power source of a motor 8 for driving the blower 7 in the air pressure generating device. By using this battery 15, there is no need to connect the power cord line from the commercial power source, so that there is an advantage that the moving range of the truck is expanded.

On the other hand, FIG. 5 shows an example in which an internal combustion engine 16 is mounted as a drive source of the blower 7. In this case, the output torque of the internal combustion engine 16 is transmitted to the blower 7 via the belt 17. By using the internal combustion engine 16 in this way, the capacity of the air pressure generating device 5 is increased, so that the weight of the item that can be loaded on the dolly is increased, and the heavy item can be easily transported.

[0017]

[Effect of device]

 As is clear from the above description, according to the present invention, a skirt portion for partitioning a closed space between the lower surface of the gantry and the floor surface is attached to the entire circumference of the gantry, and air pressure is generated in the closed space of the skirt portion. It is configured to supply pressurized air from the device. For this reason, the static pressure of the pressurized air causes the entire pedestal to float up slightly, which requires less labor to transfer gravitational objects, greatly improves operability, and prevents wheels from contacting the floor surface. You can also keep the aesthetics of the floor such as.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a rear view showing an embodiment of the present invention.

FIG. 3 is a sectional view of the bogie in a floating state according to an embodiment of the present invention.

FIG. 4 is a sectional view of an embodiment in which a battery is mounted as a drive source of an air pressure generator.

FIG. 5 is a cross-sectional view of an embodiment in which an internal combustion engine is mounted as a drive source of an air pressure generator.

[Explanation of symbols]

 1 Stand 2 Wheels 3 Skirt 4 Closed Space 5 Pressure Generator 6 Filter 7 Blower 8 Motor 9 Duct 12 Handle 13 Open Valve 14 Grip 15 Battery 16 Internal Combustion Engine 17 Belt

Claims (3)

[Scope of utility model registration request] 1. A trolley in which a handle is provided on a gantry supported by wheels and on which a transported object is mounted, and a skirt portion for partitioning a closed space between a lower surface of the gantry and a floor surface is attached to the entire circumference of the gantry An air pressure floating trolley is provided with an air pressure generator for supplying pressurized air to the closed space of the skirt portion. 2. The pneumatic levitation type bogie according to claim 1, wherein an exhaust pipe communicating with the closed space of the skirt portion is incorporated in the handle, and an open valve is provided in the exhaust pipe. Dolly. 3. The pneumatic levitation truck according to claim 1 or 2, wherein the flow rate of air supplied to the closed space of the skirt portion is detected, and when the flow rate exceeds or decreases below a certain flow rate, the supply flow rate of the air pressure generator is detected. Pneumatic levitation type trolley characterized by automatically adjusting the.