JP2003011826A - Container carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container carrier allowing even a female or an old person without much strength to easily carry out works such as tilting after mounting a container, transportation on a slope, or perpendicular erection for unloading. SOLUTION: A wheel 25 is attached so that it can move forward and backward to a lower part of a body with a structure for loading the container. A coil spring 20 expanded, compressed and restored in forward and backward moving directions of the wheel 25 is provided between a wheel 25 side and a body side. When the body is tilted for transportation after the container is loaded by erecting the body, the wheel 25 moves forward to a vicinity of a center of gravity of the loaded container while compressing the coil spring 20. Abrupt tilting of the body is prevented by compressing the coil spring 20. Since the wheel 25 is positioned in the vicinity of the center of gravity of the loaded container during transportation, weights in fore and aft of the wheel 25 balance and transportation is facilitated. When the body is erected for unloading the container, erection is assisted by expanding force of the compressed coil spring 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container carrier for carrying various containers such as LPG containers, liquefied argon ultra-low temperature containers for welding, and drums.

[0002]

2. Description of the Related Art A simple example of a carrier carrying an LPG container will be described with reference to FIGS. Figure 1
Reference numeral 6 indicates a state in which the carrier is set up. That is, FIG.
In FIG. 6, the left side is the upper side, the right side is the lower side, the upper side is the front side, and the lower side is the rear side. In the transport vehicle shown in FIG. 16, an LPG container unloaded from a transport truck or the like is transported to a predetermined place through a narrow road or the like. The carrier has a structure similar to that of a rear car. That is, four support members 2 having an inverted gate shape are arranged in parallel at substantially equal intervals to form a substantially linear support member 2.
2 are made parallel to each other and are attached to the upper ends of the frame members 1 respectively. Then, both support members 2 are extended to the front, and the extension is used as the handle 3. Both front lower end portions of the front two frame members 1 and the handle 3 are connected to each other by two connecting members 4 bent in an inverted V shape. Two bending members 5 that bend downward on both sides of the lower end of the three framework members 1
Are connected with each other. Left and right wheels 7 are attached to both ends of an axle 6 attached between the curved members 5 at positions where the front and rear masses are substantially balanced. A back plate 8 is attached to the last frame member 1.

In order to carry the LPG container by the above-mentioned carrier, the following is done. First, as shown in FIG. 17, the handle 3
Is lifted, and the lower end of the rear plate 8 is grounded. Then, the handle 3 is further set up with the lower end of the rear plate 8 as the fulcrum g which is the center of rotation. When the whole is made vertical, the rear plate 8 becomes horizontal and the entire surface is grounded, resulting in the state shown in FIG. The LPG container is placed on the horizontal rear plate 8, the handle 3 is pulled down, and the wheels 7 are grounded. In the state shown in FIG. 17, the LPG container is tilted at an angle of less than 30 degrees. Pull down the handle 3 further to make the car body horizontal, and then carry the handle 3 to the designated place. Handle 3 to lower the LPG container
Is lifted and the fulcrum g is grounded to bring it into the state shown in FIG. Further, the handle 3 is pushed up to make it vertical, and then the LPG container is lowered.

[0004]

By the way, when the LPG container is put on and tilted from the state shown in FIG. 16 to the state shown in FIG. 17, the inclination angle of the LPG container changes rapidly from 90 degrees to slightly less than 30 degrees. To do. FIG. 3 shows a 60 kg LPG container having a diameter of 370 mm and a height of 1500 mm.
Let's think about the situation where you knock it down or launch it when it is installed. The center of gravity e is at the midpoint of the diagonal line db. When gradually tilting the container from the vertical state,
A force in the pulling direction is applied until the center of gravity e reaches the position where the ab line was located, that is, from 90 degrees to about 75 degrees. After that, until the wheel 7 reaches about 30 degrees and the wheel 7 comes into contact with the ground, the container 3 is slowly tilted while supporting the handle 3 so that the container does not fall suddenly together with the carrier. On the contrary, when standing up from the state of FIG. 17 to the state of FIG. 16, it starts up by applying a large force from about 30 degrees to about 75 degrees,
After that, slowly bring it back vertically while applying a pullback force. It takes a great deal of force to defeat and stand. The larger the container, the greater the force required. In addition, when the pulling force is changed from the required place to the pushing force, and when the pushing force is changed from the necessary place to the pulling force, it is necessary to return the hand holding the handle 3. It is difficult and troublesome to return the hands, but when the container becomes large, it may be almost impossible to return the hands.

By the way, recently, there is a tendency that the size of the container becomes large for the purpose of improving the natural vaporization rate of the LPG liquid and reducing the manufacturing cost and distribution cost of the container. Containers for 50 kg and 60 kg have also been developed and put into practical use. As a liquid cryogenic cryogenic container for welding, a large container for 200 kg has already been put to practical use. In this way, the work of tilting or standing up a carrier carrying a large-sized container and the work of going up and down a sloping ground are hard work for a weak person such as a woman or an elderly person.

The inventor of the present invention responds to the tendency of increasing the size of LPG containers, and enables a person with weak strength to easily perform tilting after carrying a large container, carrying, and vertical standing for unloading. I considered various things. Then, in the conventional carrier, I noticed that the sudden change from the tilting force to the supporting force was due to the small inclination angle α of the container when the fulcrum g and the wheel 7 were in contact with each other. Therefore, it is considered that the design should be such that the inclination angle α can be set large.

[0007] It can be said that the problem at the time of loading and unloading of the container can be solved, and there is a case where it is desired to tilt the container to a nearly horizontal state and carry it when carrying a rising slope or the like. It is easy for the carrier to effectively exert force. However, when the container is tilted horizontally, the center of gravity e of the container moves to the front of the wheel 7, so that a force to support the handle 3 is necessary in addition to the force to pull it.
The supporting force increases with the size of the container. Therefore,
I have found that it is sufficient to allow the wheels 7 to be moved so that the container can be transported at a desired inclination angle. Further, when a large container is transported along the ascending slope, it may be dragged down. We thought that this could be solved by providing a reverse rotation preventing means on the wheel 7.

The problem to be solved by the present invention is to provide a container carrier capable of easily loading and unloading even a large container with a small force.

[0009]

In the container carrier according to the first aspect of the present invention, the vehicle body is erected vertically, and after the container is mounted, the vehicle body is tilted with the handle 14 with the fulcrum g at the lower end of the vehicle body as the center of rotation. Eventually, the wheel 25 comes into contact with the ground, and then the wheel 25 moves forward while the elastic body expands and contracts due to the force of the vehicle body falling. Finally, the wheel 25 is located at a predetermined position near the center of gravity e of the container. In that state, level the car body and transport it.
Once transported to the specified location, set the handle 14 upright
Ground. When the steering wheel 14 is further raised, the vehicle body stands up, and finally stands vertically. The wheel 25 expands and contracts by the force of the elastic body and returns to the original position. Now unload the container from the car body.

According to the second aspect of the present invention, when the container-carrying vehicle is tilted while rotating about the fulcrum g, the wheels 25 eventually come into contact with the ground. Then, the turning handle 33 is turned to move the wheels 25 forward. When the wheel 25 has been moved to the predetermined transport position, turn it to turn the handle 3
Stop the rotation of 3 and level the car body for transportation. To lower the container, the handle 14 is lifted and the fulcrum g is grounded.
Next, the turning handle 33 is reversely rotated to move the wheels 25 backward, and the vehicle body is started up. When the wheels 25 move backward to the predetermined position, the handlebar 14 is pushed up and the vehicle body is set upright.

According to claim 3, in claim 1
When the container transport vehicle according to 2 is moved forward, the one-way rotation preventing means prevents the wheels 25 from rotating in the opposite direction, so that the vehicle body does not move backward. In the invention according to claim 4, when the container carrier is moved forward, the one-way rotation preventing means is the wheel 2
In order to prevent the reverse rotation of 5, the vehicle body does not move backward. According to the fifth aspect of the present invention, a small force is required when the container-carrying vehicle is tilted and when it is erected vertically.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The inventor of the present invention has been investigating whether or not it is possible to develop a carrier that can load and unload a large container with a small force. As a result of repeated studies, the present invention has been completed. An embodiment of the present invention will be described in detail with reference to FIG.

In FIG. 1, two long rod-shaped base members 10 are provided.
Books are arranged in parallel on the left and right, and rod-shaped support members 11 of the same length are arranged on the left and right in parallel with each base member 10 above the base member 10. The front end and the rear end are connected by a front member 12 and a rear member 13 to be integrated. The two support members 11 are slightly inclined forward and downward to extend, and the extension portions are two handles 14. Side plates 15 extending from the left and right support members 11 to be substantially parallel to the base member 10 and below the base member 10 are provided near the rear ends, and a rear plate 16 is mounted between the rear ends of the side plates 15. Auxiliary wheels 17 are attached to the lower ends of the side plates 15, respectively. A stopper plate 18 is attached at a right angle downward from the front portions of both base members 10 to make a hole below the stopper plate 18, and a support rod 19 is extended rearward through the hole. Fit the coil spring 20 around the support rod 19,
The lower end of the slider 21 is attached to the rear end of the support rod 19. Rollers 22 provided above the slider 21 are arranged along the base member 10 so that the slider 21 moves back and forth along the base member 10. As shown in FIG. 2, the bolt 23 is screwed into the base member 10 from above the slider 21,
The slider 21 can be freed or fixed at an arbitrary position. An axle 24 is provided at the lower end of the slider 21, and wheels 25 are attached to both ends of the axle 24.

In order to mount the container on the carrier shown in FIG. 1, the handle 14 is pushed up and the entire surface of the rear plate 16 is grounded and stands vertically. Then, tilt the container slightly to the opposite side to create a small gap between the bottom of the container and the ground. Push the carrier slightly and push the back plate 16 into the gap to load the container.
Bind the upper part of the container to the support member 11 with a string,
It is also possible to push the upper part of the container with the support member 11 and tilt the container while operating the handle 14 so that the lower part of the carrier is pushed with the foot while operating the handle 14, and the rear plate 16 is pushed into the gap between the container and the ground. Next, while pulling the upper part of the container toward the base member 10, the vehicle body is rotated by using the lower end corners of the side plates 15 as the fulcrum g which is the center of rotation to ground the wheels 25, and the state shown in FIG. 1 is obtained. The fulcrum g of the side plates 15 and the wheel 25 support the whole. As shown in FIG. 4, the angle between the vertical centerline of the container and the ground in this state is α, and the angle between the line connecting the center of gravity e of the container and the fulcrum g and the vertical centerline of the container is β. And In the case shown in FIG. 1, α is about 70 degrees.

The handle 14 is further tilted from the state shown in FIG. As will be described later in detail, the wheel 25 moves forward together with the slider 21 while compressing and contracting the coil spring 20 by the action of the horizontal component force h of the rotational force of the container, and the inclination angle α of the container gradually decreases. Finally, the fulcrum g floats, the auxiliary wheel 17 comes into contact with the ground, and the auxiliary wheel 17 and the wheel 25 support the whole body, and the transportation posture shown in FIG. 2 is obtained. α is about 30 degrees. Details will be described in the section of Examples, but when the transportation angle is 30 degrees, the compression amount of the coil spring 20 is about 51.
%, And the contact amount of the coil spring 20 is 75%. When the compression amount is about 51%, the coil spring 20 has a delayed fatigue and a long life.

In this state, it is carried to a predetermined place. In order to lower the container, the state of FIG. 2 is changed to the state of FIG. 1 and then the container is rotated around a fulcrum g to stand vertically. Then, in order to lower the container from the rear plate 16, both wheels 25 may be alternately drawn while tilting the container to the opposite side of the operator. (Considering the case where the container is unloaded from the rear plate 16, it is desirable that the area of the rear plate 16 be less than half the area of the bottom surface of the container. This is because the container tends to tilt.)

The front end of the support bar 19 is connected to the stopper plate 1
8, the rear end side of the support rod 19 may slide on the outer periphery of the axle 24. The support rods 19 are divided into two, and the support rods 19 are spaced apart by the set compression amount of the coil springs 20.
The front end and the rear end may be attached to the stopper plate 18 and the axle 24. One of the support rods 19 divided into two may be made of a pipe material, and the other may be fitted in the pipe material so that the two expand and contract. The stopper plate 1 is attached to the rear portion of the support rod 19.
If the diameter of the coil spring 20 is larger than that of the hole of No. 8 and the step of the tip of the large diameter portion hits the stopper plate 8, the compression amount of the coil spring 20 is 50% or less. It is possible to prevent shortening of life due to. Instead of the coil spring 20 which is a compressible elastic body fitted between the axle 24 and the stopper plate 18, a tensile elastic body may be arranged in front of the stopper plate 18. In addition, instead of the coil spring 20, it has a function of displacing an appropriate amount by pressurization such as an elastic body by a cylinder / piston using gas as a medium, an elastic synthetic resin / rubber such as urethane, and restoring when the pressurization is removed. You may use various elastic bodies, such as an elastic body.

Let us load the LPG container shown in FIG. 3 on a carrier and calculate the force required to collapse it. The right and left views of FIG. 3 show a 60 kg LPG container having a diameter of 370 mm and a height of 1500 mm. In the case of the left figure, the handle 14 is placed at the point a so that the point b of the container and the fulcrum g of the side plates 15 are aligned with each other. When the mass of the LPG liquid is 60 kg and the mass of the container is 30 kg, a force of 882 Newton (hereinafter referred to as “N”) acts vertically on the center of gravity e.
When a horizontal force of 236 N is applied to the center of gravity e, the container falls down.
The one on the right is a case where the fulcrum g of the side plates 15 is apart from the point b. The container falls when a force of 321 N is applied. Since the distance from the cb line to the a point is twice the distance from the cb line to the e point, the force applied to the a point is half of 236N or 321N, that is, 118N or 160.5N. These forces are very small and can be easily exerted by women and the elderly. If the position of the handle 14 is set higher than the point a, a smaller force will be required depending on the position.

Based on FIG. 5, the force p required to vertically stand the container at the inclination angle α will be described. The vertical axis represents p and the horizontal axis represents α. It was calculated that the handle 14 was located near the head of the container, and the mass of the carrier was ignored. As α becomes larger, p becomes smaller, and when α becomes 40 degrees or more, p becomes 220N or less.
With a power of 220N, women and elderly people can easily put it out. Note that p is 0 when α is 70 degrees or more.
In the case of the 60 kg container shown in FIG. 3, within the range in which the center of gravity e is on the left side of the fulcrum g, a restoring force that tends to make the container vertical is generated. That is, when α is in the range of 70 to 90 degrees, p
Even if it is 0, the container itself stands vertically. The wheel 25 may be fixed at a position where α + β becomes a constant angle of 60 degrees or more. From the structure of the carrier according to the present invention, the best angle β is 20
It is considered to be degree. Then, p becomes 220 N or less when α is 40 degrees or more from FIG. That is,
This is because if α + β is 60 degrees or more, the force for tilting the container-carrying vehicle and standing vertically is small. α
May be adjusted according to the diameter of the wheel 25 or a fixed position.
The upper limit angle of α is 90 ° -β.

By the way, a super large container (LP for super 60 kg
In the case of a G container, a 200 kg liquid cryogenic cryogenic container, etc.), it is impossible to rely on human power alone to tilt or stand vertically. However, a transporting vehicle such as that shown in FIG. 1 in which wheels 25 that are elastically imparted to move and are moved can be operated with a weak force. As shown in FIG.
A horizontal component force h, which is a force corresponding to the mass of the container, is generated when the container is tilted and when the container is upside down. S in FIG. 4 indicates a locus curve of the center of gravity e of the container when the container is tilted around the fulcrum g. Ignoring the acceleration of the falling force, a rotational force 2p is generated at the center of gravity e, and a horizontal component force h is generated at the rotational force 2p. When the carrier is tilted, the horizontal component force h causes the wheels 25 to rotate and move. The position of the wheel 25 also changes following the position change of the center of gravity e of the container. This is convenient because the front and rear forces centering on the wheel 25 are balanced. When the container is tilted, the coil spring 20 is compressed and prevented from falling rapidly.

FIG. 4 shows a case where the coil spring 20 is attached parallel to the vertical center line of the mounting container. The horizontal component force h has a maximum value when α is (45 ° −β). This means that the larger the β is, the more suitable it is to bring α of the container closer to the horizontal.

On the contrary, when the container is erected vertically from the tilted state, the extending force of the coil spring 20 acts as a force for raising the container. When the container is tilted, the horizontal spring force h compresses the coil spring 20 to store the force, and the stored force becomes a restoring force when the container is stood up. The restoring force is determined by the spring constant and the compression amount of the coil spring 20. For each of the spring constants of 6.03 N /% and 9.81 N /%, the restoring force as the force pr acting on the handle 14 was calculated by the formula shown in FIG.
β was set to 20 degrees, and the result is shown by a broken line in FIG. The force applied to the handle 14 to stand the container vertically is the value p shown by the solid line minus the value pr shown by the broken line. Figure 5
The middle x mark indicates where the horizontal component force h and the horizontal component force hr of the restoring force R by the coil spring 20 are balanced. And it means that α does not become 35 degrees or less. on the other hand,
The mark Δ indicates that the coil spring 20 is close to 75% of the compression limit. It also means that α does not fall below approximately 30 degrees.

The inclination angle α of the container may be controlled. FIG. 6 shows an example of a mechanism for controlling the inclination angle α by the moving means of the wheel 25, which is a meshing mechanism that converts the rotational movement of the turning handle into a linear movement. The upper diagram of FIG. 6 is a front view showing the control mechanism, and the lower diagram is a sectional view taken along line AA and BB of the above diagram. The two base plates 10 are spaced apart from each other.
It is attached from the bottom. A guide rod 26 is attached between both stopper plates 18 in parallel with the base member 10, and a rack 27 is attached forward from the stopper plate 18 on the front side at an extension position of the guide rod 26. Guide rod 26
Is sandwiched between two elongated support plates 28, and the guide rod 26 is sandwiched between two rollers 29 mounted between both support plates 28.
The axle 24 is attached to the lower end of the support plate 28, and the wheels 25 (not shown) are attached to both ends of the axle 24. The rack 27 is also sandwiched between two elongated support plates 30, and the rack 27 is sandwiched between an upper roller 31 and a lower pinion 32 mounted between both support plates 30. A turning handle 33 is attached to the rotating shaft to which the pinion 32 is attached. The axle 24 and the lower ends of both support plates 30 are connected by a connecting rod 34. Since the wheel 25 moves by rolling, the wheel 25 can be moved with a force approximately equal to the traction force during transportation. When the wheel 25 is moved by turning the handle 33 when the container is tilted, the handle 33 can be rotated by a rotational force obtained by subtracting a force corresponding to the horizontal component force h. On the other hand, when the container is set upright, it is increased by the amount corresponding to the horizontal component force h. If the turning handle 33 has an optimum diameter, the wheels 25 can be moved with a small rotational force to stand the container vertically.

Instead of the meshing mechanism of the rack 27 and the pinion 32, a screw meshing mechanism of bolts and nuts may be used. In this case, in order to increase the moving distance of the wheel 25 per one rotation of the turning handle 33, it is desirable to adopt a multiple thread screw. The structure may be such that the turning handle 33 is attached to the bolt, the nut is attached to the axle 24, and the turning handle 33 is turned to move the axle 24. Illustration and detailed description of this structure are omitted.

It is also possible to provide reverse rotation preventing means such as a ratchet device for preventing the wheel 25 from rotating in the direction opposite to the carrying direction. It is effective when transporting a rising slope.
As the ratchet device, a device as shown in FIG. 7 may be adopted. That is, the right-handed ratchet wheel 35 and the left-handed ratchet wheel 36 are meshed with each other and the left-handed ratchet wheel 37 is engaged.
It is also possible to provide a pair of wheels and the claws 38 for blocking the right rotation, which are provided on both wheels 25 and the axle 24. Alternatively, one of the combinations may be provided as a pair and provided on both wheels 25 and axle 24. This is because, depending on the carrier, there are people who are good at pulling and carrying the handle 14 and people who are good at pushing and carrying the handle 14. When transporting on flat ground, the pawls 36 and 38 are turned in the direction of the arrow and released at the position indicated by the broken line. It can be transported in either direction.

When the axle 24 is fixed and only the wheel 25 is rotated, a gap k as shown in FIG. 7 is provided between the shaft of the pawl 36 and the shaft of the pawl 38, and as shown in FIG. Any mechanism may be used. The claw body 39, which is integrally formed by arranging the right-handed ratchet wheel 35 and the left-handed ratchet wheel 37 in parallel, is arranged on the outer periphery of the axle 24, and the claw body 39 is integrally attached to the wheel 25 by a bolt 40. Axle 2 with bolt 41
The pawl 36 for preventing the left rotation and the pawl 38 for preventing the right rotation are attached to the fixing tool 42 attached to the claw 36, respectively.
And the claw 38 meshes with the ratchet wheel 35 and the ratchet wheel 37, respectively.

Based on FIG. 9, the traction force f required for towing a 60 kg container along an inclined surface having an ascending slope of 30 degrees will be calculated. The component force parallel to the inclined surface and the component force perpendicular to the inclined surface are 441N and 764N, respectively. Rolling friction coefficient is 1
If calculated as / 100, the traction force f is (441 + 76
4 × 1/100) N, which is about 450N. 450
The power of N is a heavy burden for women and the elderly. However, according to the transportation method by the zigzag forward movement in which the left and right wheels 25 are alternately forwarded and stopped, the vehicle can be transported with half the force of 450 N, and a weak person is okay. Usually, there are many slopes that are less than 30 degrees. The smaller the climb angle, the smaller the force required. Since the static friction coefficient of the tire of the wheel 25 is about 0.9, a braking force of 764N × 0.9 = 688N acts on the wheel 25 even if the force is removed on the inclined surface. Since the carrier does not slip down, there is no problem with safety.

The following is a comparison between the conventional method of using a carrier without a unidirectional rotation preventing means and the zigzag method of carrying a carrier according to the present invention. In the case of using a conventional transport vehicle, the wheels on the side that does not apply traction even when performing zigzag march rotate in reverse, and repeat zigzag in order to travel in the opposite direction along the ascending slope. As the number of times increases, it is difficult to move forward as a whole. On the other hand, in the case of the present invention, since the wheels on the side that does not apply traction are merely stopped, there is an advantageous effect that the zigzag marching acts more effectively and the traveling distance increases. It will appear more.

The transport vehicle may be a two-wheeled vehicle having two wheels 25 on the left and right, or a four-wheeled vehicle having two auxiliary wheels 17 added thereto. In the case of a motorcycle equipped with only wheels 25,
If the inclination angle of the container during transportation changes, the position of the center of gravity e of the container also changes. It is desirable to determine the transportation angle. Then, it is desirable to carry it upright at an angle close to vertical, or to incline at an angle close to horizontal. In any case,
It is desirable that the wheels 25 be attached near the position where the center of gravity e of the container comes at the transportation angle. Then, the handle 14 can be lifted and lowered with a light force. In the case of a four-wheeled vehicle in which two auxiliary wheels 17 are added, it is better that the center of gravity e of the container is located between the auxiliary wheels 17 and the wheels 25. The force applied to the handle 14 during transportation is only the traction force f for transportation. In addition, when the angle formed by the straight line connecting the grounding point of the auxiliary wheel 17 and the center of gravity e of the container with the vertical center line of the container in the state where the auxiliary wheels 17 and 25 are grounded is θ, θ is larger than β described above. Therefore, the inclination angle α of the container can be brought close to horizontal and transported.

Next, the case of a two-wheeled vehicle is shown in FIG.
It will be described based on. When tilting from the vertical state, the fulcrum g rotates about the center of rotation, then the fulcrum g rises, and the center of rotation moves to the grounding point of the wheel 25. Α + η shown in FIG. 10 is 90 degrees or more. η is an angle formed by a straight line connecting the ground contact point of the wheel 25 and the center of gravity e of the container with the vertical center line of the container. The rotational force 2p is directed to the left, unlike the case shown in FIG. The direction of the horizontal component force h of the rotational force 2p is also leftward. The horizontal component h acts to move the fulcrum g backward, but the fulcrum g is difficult to move due to sliding friction. In effect, roll the wheel 25 forward to
Of the coil spring 20 and the coil spring 20 is compressed. After all, it is the same as that shown in FIG.

From the equation shown in FIG. 10, the horizontal component force h is α + η
Has a maximum value of 135 degrees, and has a maximum value of 90 degrees. When the carrier is tilted, the fulcrum g rises.
It is to make + η smaller in the direction of 90 degrees. Along with this, the horizontal component force h also decreases. Then, the wheel 25 rolls in the backward direction by the restoring force R of the coil spring 20, the position of the wheel 25 and the position of the center of gravity e coincide with each other, and α + η
Is 90 degrees. When α + η becomes 90 degrees, it means that the coil spring 20 is completely restored and the wheel 25 is retracted to return to the original position.

If α + η is less than 90 degrees and the force for supporting the handle 14 during transportation is large and the burden on the carrier becomes too large, tighten the bolts 23 at an angle of α + η around 130 degrees to fix the wheels 25. May be. Then, the handle 14 is lowered downward so that α + η is in the vicinity of 90 degrees, and it may be transported at an angle in the vicinity of the 90 degrees. When unloading the container after transportation, if the fulcrum g is attached to the ground, the bolt 23 is loosened and the handle 14 is lifted, the restoring force R of the coil spring 20 is effectively applied.

The lower end of the stopper plate 18 may be extended downward, one wheel may be attached to the center of the lower end, and two wheels 25 may form a tricycle structure. In this case, during transportation, the coil spring 20 is completely restored and the wheel 25 moves rearward. When the handle 14 is lifted to finish the transportation and lower the container, a horizontal component force h is generated until the fulcrum g reaches the ground, the wheel 25 moves forward, and the coil spring 20 is compressed. Then, if the handle 14 is further lifted with the fulcrum g as the center of rotation, the restoring force of the coil spring 20 will effectively act.

The handle 14 may be bent downward as shown in FIG. A horizontal bar may be bridged between the front ends of both handles 14. There is no need to return the hands when switching the puller / supporter when loading and unloading containers.

A supporting member 1 for supporting the outer circumference of the container is provided on the carrier.
Two or more 1 may be provided. You may provide the base member 10 grade | etc., With the part which imitates the outer peripheral surface of a container. The axle 24 may be fixedly provided by being connected to the base member 10 and the support member 11 via a connecting means. As shown in FIGS. 1 and 2, the base member 10 and the support member 11 may be attached so as to move. It is desirable that the base member 10, the support member 11 and the like are made of aluminum alloy hollow pipes in order to reduce the weight.

[0036]

[Example] A transport vehicle shown in FIG. 1 was manufactured. However, the bolts 23 were not used, and the reverse movement preventing means of the wheel 25 shown in FIG. 11 was attached. That is, the claw 4 that can be rotated
3 was attached to the base member 10 side, and a rack member 44 having teeth that mesh with the claws 43 was attached to the slider 21 side.
In the illustrated example, the rack member 44 side, that is, the wheel 25
The side can only move to the right. When unloading the container after transportation, the claw 43 is rotated to the position shown by the broken line. The wheel 25 moves leftward by the restoring force of the coil spring 20. A coil spring 20 for ultra-deflection was used in parallel with the base member 10 to have a length of 900 mm (corresponding to 910 mm when the center line of the axle 24 was used as a reference).

First, the inclination angle α of the container and the coil spring 20
It is most important to find the relationship with the amount of compression. Figure 1
I tried using the drawing method shown in 2. In the case of a four-wheeled vehicle structure, a straight line parallel to the base member 10 is drawn from the ground contact point of the auxiliary wheel 17, and a radius of curvature of 1224 mm is taken as the distance from the intersection of the straight line and the stopper plate 18 to draw an arc. Then, a parallel straight line that is translated by 180 mm from the straight line to the axle 24 is drawn. It means that the axle 24 is located at the intersection of the parallel movement straight line and the movement locus straight line of the axle 24 (225 mm from the ground). The length from that position to the arc is the length of the compressed coil spring 20. If the length of the compressed coil spring 20 is measured, the compression amount of the coil spring 20 can be calculated. In FIG. 12, α is 5
The case of 0 degrees is shown.

In the case of the two-wheeled vehicle structure, since the bottom corner of the carrier which is in contact with the ground is the fulcrum g, the radius of curvature is 1305 mm. A parallel line to the base member 10 is drawn from the fulcrum g, and the length from the parallel line to the axle 24 is 297 mm.

Next, in order to select the spring constant of the coil spring 20, the spring constants of 6.03 N /% and 9.81 N /% were examined. The coil spring 20 has an outer diameter of 42 mm.
-A coil spring for ultra-deflection having an inner diameter of 31 mm, a length of 900 mm, and an adhesion length of 25% of the length was used. FIG. 13 shows the case where the spring constant is 6.03 N /%. Amount of compression w on the horizontal axis
Is shown in%, and the vertical axis indicates the coil spring 20 corresponding to the compression amount w.
The restoring force R of N is indicated by N. The horizontal axis also shows the relationship between the container inclination angle α and the compression amount w of the coil spring 20.
The spring constant of 9.81 N /% is the restoring force R shown on the vertical axis.
Since it is the same as that of FIG. 13 except that becomes larger, illustration is omitted.

It was calculated how much the inclination angle α of the container would be reduced if the spring constant of the coil spring 20 was different. FIG. 14 shows a carrier having a four-wheeled vehicle structure equipped with an aluminum alloy 60 kg container filled with LPG liquid. How much α becomes small is shown in FIG.
Horizontal component force h of rotational force 2p and horizontal component force h of restoring force R shown in
It can be understood by comparing with r. The carrier shown in Fig. 1 has α of about 6
Since the auxiliary wheel 17 contacts the ground and the fulcrum g floats when the angle is 0 °, the fulcrum of rotation is the grounding point of the auxiliary wheel 17. Therefore, β in FIG. 4 is replaced with θ and θ is 3
Calculated as 0 degree. θ is an angle formed by a straight line connecting the grounding point and the center of gravity e of the container with the vertical center line of the container when the grounding point of the auxiliary wheel 17 serves as a fulcrum of the rotation center. In Fig. 14, ○ and ● indicate the spring constant of 6.03 N /%.
And 9.81 N /%, the restoring force R of the coil spring 20
The horizontal component hr of each of these is shown. The cross indicates
The horizontal component force h of the rotational force 2p by the force 882N acting perpendicularly to the center of gravity e of the container is shown. Spring constant 6.0
For 3N /%, α is about 25 degrees and spring compression is 68%
Is approaching 75% of the compression limit and is not less than about 25 degrees. Spring constant 9.81N
In the case of /%, α is about 33 degrees and h and hr are balanced,
Is not less than about 33 degrees.

In some cases, the carrier may be equipped with a container having a capacity smaller than that of the 60 kg LPG container. Spring constant 6.03
With respect to N /%, it was examined how much α increased when a 30 kg LPG container was mounted. The results are shown in Fig. 15. When α is about 40 degrees, h and hr are balanced, and 6
It is about 15 degrees larger than the 0 kg LPG container.

Coil spring 20 having a spring constant of 6.03 N /%
Using the unidirectional rotation preventing means shown in FIG.
I made a carrier attached to. A woman with an average physical strength carried an LPG container made of aluminum alloy for 60 kg, and carried out the work of carrying an inclined surface with an ascending slope of 30 degrees and lowering it. It was possible to easily perform various operations such as tilting after loading the container, transporting the inclined surface, and standing vertically for lowering.

[0043]

When the container carrier according to the present invention is used,
Even weak women and elderly people can easily perform various operations such as tilting after loading a container, transporting an inclined surface, and standing upright for unloading.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a container carrier according to the present invention.

FIG. 2 is a front view showing the operation of the one shown in FIG.

FIG. 3 is a diagram illustrating the force of tilting a 60 kg LPG container-equipped carrier.

FIG. 4 is a diagram illustrating a force relationship that occurs when the loading container carrier is tilted and when it is vertically erected.

FIG. 5 is a diagram illustrating the force required to stand a 60 kg LPG container-equipped carrier vertically.

6A and 6B are a front view showing a moving means of a wheel 25, and a cross-sectional view taken along the line AA and the cross-sectional view taken along the line BB of the front view.

FIG. 7 is a vertical cross-sectional view showing a rotation preventing means for a wheel 25 in one direction.

8 is a front view showing an example in which the one shown in FIG. 7 is attached to an axle 24 and a wheel 25. FIG.

FIG. 9 is a diagram illustrating the traction force required to carry a 60 kg LPG container along a slope of a 30 degree rise slope.

FIG. 10 is a diagram illustrating a force relationship that occurs when the container-equipped transport vehicle is tilted.

FIG. 11 is a front view showing an example of a unidirectional rotation preventing means for a wheel 25.

FIG. 12 is a diagram illustrating the relationship between the tilt angle of the mounting container and the compression amount of the coil spring 20.

FIG. 13: Restoring force R of coil spring 20 and coil spring 20
FIG. 5 is a diagram illustrating the relationship between the compression amount w and the inclination angle α of the mounting container.

FIG. 14 is a diagram illustrating the relationship between the inclination angle α of the mounting container and the horizontal component force h of the rotational force of the mounting container and the horizontal component force hr of the restoring force of the coil spring 20.

FIG. 15 is a diagram illustrating the relationship between the inclination angle α of the mounting container and the horizontal component force h of the rotating force of the mounting container and the horizontal component force hr of the restoring force of the coil spring 20.

FIG. 16 is a front view showing an example of a conventional container carrier.

FIG. 17 is a front view showing the operation of that of FIG. 16;

[Explanation of symbols]

14 handle 24 axle 25 wheel 33 turning handle

Claims (5)

[Claims] 1. A handle (14) is provided in front of a vehicle body having a structure for mounting a container, and a wheel (25) is attached below the vehicle body via an axle (24) so as to be able to move forward and backward. 25) A container carrier in which an elastic body that expands and contracts in the forward and backward directions of 25) is provided between the wheel (25) side and the vehicle body side. 2. A handle (14) is provided in front of a vehicle body having a structure for mounting a container, and a wheel (25) is attached below the vehicle body via an axle (24) so as to be able to move forward and backward, and a steering wheel is provided. A container transport vehicle in which means for moving wheels (25) by a meshing mechanism that converts the rotational motion of (33) into linear motion is provided between the wheel (25) side and the vehicle body side. 3. The container according to claim 1 or 2, wherein means for preventing the wheel (25) from rotating in one direction by a ratchet device is provided between the wheel (25) side and the vehicle body side. Carrier. 4. A handle (14) is provided in front of a vehicle body having a structure for mounting a container, and a wheel (25) is attached to a lower portion of the vehicle body via an axle (24) so that the wheel (25) by a ratchet device is installed. A container transport vehicle provided with a unidirectional rotation preventing means between the wheel (25) side and the vehicle body side. 5. The inclination angle α of the container when the fulcrum g, which is the center of rotation, and the wheel (25) are in contact with the ground when the container is loaded and tilted from the standing state or standing from the lying state. The axle (24) is fixed such that the angle β formed by the straight line connecting the center of gravity e of the container and the fulcrum g and the longitudinal centerline of the container is a constant angle of 60 degrees or more. The container carrier according to claim 4.