JP2021030938A - Transport device for carriage and load carrying method - Google Patents

Abstract

To provide means which can be attached to a carriage without requirement for a separate member such as a fitting auxiliary tool.SOLUTION: A transport device for a carriage comprises at least a body part A1 which is inserted below a loading table which constitutes the carriage. The body part A1 has at least a base frame 10, a roller frame 20, and a changeover mechanism 30. The changeover mechanism 30 is changeable between an insertion/extraction posture that enables insertion/extraction of the body part A1 between the loading table and a ground surface in the state where a wheel 12 for insertion/extraction grounds a ground surface and a wheel 21 for transportation is separated from the ground surface, and a transport posture in which a height of a loading surface 11 is raised to separate the wheel 12 for insertion/extraction from the ground surface while loading the carriage on the loading surface 11, and the wheel 21 for transportation grounds the ground surface.SELECTED DRAWING: Figure 1

Description

The present invention relates to a trolley transport device for loading and transporting trolleys, and a method for transporting a trolley in which a trolley with a trolley is mounted is transported as it is by using the trolley transport device.

The following Patent Document 1 describes an electrically assisted vehicle for a carriage, which comprises a frame including an electric transport wheel (2), an electric motor (3), a battery (6), and a pillar (11) for pushing the carriage. It is disclosed.

Japanese Unexamined Patent Publication No. 2001-130414

The electrically assisted vehicle described in Patent Document 1 has at least one of the problems described below.
(1) When locking the electrically power assisted vehicle to the trolley, it is necessary to install a taper type mounting aid at a position corresponding to each of the carriers of the trolley. Further, when the electrically assisted vehicle is removed from the trolley, the above-mentioned mounting assisting tool must be prepared, which makes the work complicated.
(2) It becomes necessary for the worker to carry out the work with the controller (not shown) at the end of the controller line being picked up by the worker.

Therefore, one of the objects of the present invention is to provide a means that can be attached to a trolley without requiring a separate member such as an attachment auxiliary tool.

The first invention of the present application, which has been made to solve the above problems, is a transport device for a trolley, which includes at least a main body portion to be inserted under a mounting table constituting the trolley, and the main body portion mounts the trolley. A roller frame, a roller frame, and the base frame and the above, which have at least a mounting surface for the dolly and a wheel for insertion and removal used when inserting the trolley into the above-mentioned pedestal. It has at least a switching mechanism capable of changing the relative position between the roller frame and the roller frame, and the switching mechanism has the main body, the insertion / removal wheel touches the ground, and the transport wheel touches the ground. As a state of separation, the insertion / removal posture that enables insertion / removal between the above-mentioned pedestal and the ground, and the height of the mounting surface are raised to mount the dolly on the mounting surface while mounting the insertion / removal wheels on the ground. It is characterized in that it can be switched to a transport posture in which the transport wheels are separated from the ground and the transport wheels are in contact with the ground.
Further, in the second invention of the present application, in the first invention, the switching mechanism has at least a lever capable of switching between the first posture and the second posture, a movable portion operated by the lever, and the above. It includes at least an elastic member interposed between the base frame and the roller frame, and in the first posture, the movable portion is pushed by the end of the lever with respect to the base frame. In the state where the roller frame is pulled and the elastic member is compressed, the insertion / removal posture is maintained, and in the second posture, the restoring force of the elastic member causes the end of the lever in the first posture. By returning the movable portion pushed to the original position, the base frame and the roller frame are returned to a position separated from each other to maintain the transporting posture, and at the transporting posture, the elastic member causes the elastic member to move. It is characterized in that it functions as a suspension interposed between the transport wheel and the mounting surface.
Further, the third invention of the present application is characterized in that, in the first invention or the second invention, a motor for traveling on the transport wheels is provided.
Further, the fourth invention of the present application is characterized in that, in any one of the first to third inventions, a steering mechanism capable of setting the traveling direction of the transport wheel in an arbitrary direction is provided. Is to be.
Further, in the fifth invention of the present application, in any one of the first to fourth inventions, the operation unit attached to the main body portion is further provided so as to stand upright against the main body portion at least. The operation unit is provided with a controller for operating the transfer wheel.
Further, the sixth invention of the present application is characterized in that, in the fifth invention, the operation portion is configured to be foldable so as to lie down with respect to the main body portion.
Further, the seventh invention of the present application is a method of transporting a transported object using the carriage transport device for a trolley according to any one of the first to sixth inventions, and is more than the long side of the trolley. The trolley is characterized in that the trolley transport device is inserted from the long side of the trolley into a trolley on which a long transported object is placed, and the trolley and the transported object are collectively transported by the transport wheels. Is to be.

According to the present invention, at least one of the effects described below is exhibited.
(1) The switching mechanism provided in the main body makes it possible to easily switch between the insertion / removal posture and the transport posture, and it is not necessary to separately prepare an auxiliary tool, so that the transport device is highly convenient.
(2) By configuring the switching mechanism with a lever, a movable part, and an elastic member, it is possible to switch between the insertion / removal posture and the transport posture by standing / tilting the lever without requiring electric power.
(3) The elastic member that exerts the function of adjusting the relative position between the base frame and the roller frame when switching from the insertion / removal posture to the transport posture also functions as a suspension in the transport posture, so that the stability during the transport work is improved. high.
(4) By driving the transport wheels with a motor, the transport work can be performed without manpower.
(5) By providing a steering mechanism on the transport wheels, the transport device can be driven in any direction.
(6) In addition to the main body that sneaks into the lower part of the trolley during transportation, the operation unit with the controller is provided in an upright manner with respect to the main body so that the operator can operate the transport device in a natural posture. It can be carried out.
(7) The transport device can be compactly accommodated by configuring the operation unit so as to be foldable so as to lie down with respect to the main body unit.
(8) Even if the trolley is equipped with a transported object that is longer than the long side direction of the mounting table, the transporting operation can be performed without interfering with the transporting device.

The schematic perspective view which shows the structure of the transport device which concerns on this invention. The schematic diagram which shows the structural example of a roller frame. The schematic which shows the structure of the switching mechanism. Schematic side view showing the transition from the insertion / removal posture to the transport posture. A schematic perspective view showing a state in which the transported object can be transported together with the trolley. The schematic perspective view which shows the state which the operation part was folded with respect to the main body part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall configuration (Fig. 1)
FIG. 1 shows a schematic perspective view of the carriage transport device A according to the present embodiment.
The carriage transport device A according to the present invention (hereinafter, also simply referred to as “transport device A”) has at least a main body portion A1 to be inserted under the mounting table X1 constituting the carriage.
In this embodiment, in addition to the main body A1, an operation unit A2 for operating the main body A1 is provided in an upright manner.
When the trolley mounted on the main body A1 is manually transported, or when the controller 40 is provided by extending the cable from the main body as described in the above-mentioned prior document, the operation unit according to the embodiment shown in FIG. Since A2 is not required, the operation unit A2 is not an essential element in the present invention.
Hereinafter, the details of each component will be described in the order of the operation unit A2 and the main body unit A1.

<2> Operation unit (Fig. 1)
The operation unit A2 is provided separately from the main body unit A1 and is an element for operating the main body unit A1.
In this embodiment, the operation unit A2 is attached to the main body A1 on the rear end side of the main body A1 so as to be able to stand upright and lie down, and has a controller 40 and a battery 50.
In the present embodiment, as the controller 40, in the operation unit A2 in the upright state, a power switch, a traveling switch, an emergency stop switch, and a steering lever are provided at the upper end portion and the front end portion of the substantially rectangular parallelepiped shape constituting the operation unit A2. 31 and a battery 50 display unit and the like are provided.
Further, the battery 50 is a device for supplying electric power to various motors used for driving the transport wheels 21, and in the present embodiment, the operation unit A2 in the upright state constitutes the operation unit A2. The battery 50 is detachably provided in a space in which the front end portion of the rectangular parallelepiped shape is recessed.

<3> Main body (Fig. 1)
The main body A1 is an element for being inserted under the mounting table X1 constituting the vehicle.
The main body A1 has a posture in which the dolly can be inserted and removed under the mounting table X1 constituting the dolly (insertion / removal posture) and a posture in which the dolly can be lifted and transported from the state of being inserted under the mounting table X1 (transportation). The posture) and can be switched arbitrarily.
As an example of realizing the above configuration, in this embodiment, the main body A1 is configured to include at least a base frame 10, a roller frame 20, and a switching mechanism 30.
The details of each part will be described below.

<4> Base frame (Fig. 1)
The base frame 10 is a member for lifting the carriage when the insertion / removal posture is switched to the transport posture.
In this embodiment, the base frame 10 is configured to have at least a mounting surface 11 for mounting the trolley and an insertion / removal wheel 12 used when inserting the mounting base X1 constituting the trolley.
Further, the lower part of the base frame 10 is opened so that the roller frame 20 housed inside can appear and disappear downward.

<4.1> Mounting surface (Fig. 1)
The mounting surface 11 is provided on the upper surface of the base frame 10 and is a surface for lifting the trolley in the transporting posture.
The width and length of the mounting surface 11 may be appropriately set within a range shorter than the wheel spacing of the trolley so that the main body A1 can be inserted into the trolley mounting base X1.

<4.2> Wheel for insertion and removal (Fig. 1)
The insertion / removal wheel 12 is a wheel provided at the lower part of the base frame 10 and used for traveling the main body A1 in the insertion / removal posture.
In this embodiment, a total of four insertion / removal wheels 12 are provided at two locations each near the center of the base frame 10 and near the rear.
The insertion / removal wheel 12 is in a state of being slightly separated from the ground by handing over the installation with the ground to the transport wheel 21 in the transport posture.

<5> Roller frame (Figs. 1 to 3)
The roller frame 20 is a member for running the main body A1.
The roller frame 20 has at least a transport wheel 21 used for traveling in a transport posture.

<5.1> Transport wheels (Fig. 1)
The transport wheel 21 is provided below the roller frame 20 and is used for traveling in the transport posture.
In this embodiment, two transport wheels 21 are provided at intervals in the longitudinal direction of the roller frame 20.
Further, each transport wheel 21 is composed of urethane rollers.

<5.2> Driving method of transport wheels (Fig. 2)
Each of the transport wheels 21 can use a motor separately provided on the roller frame 20 as a drive source.
FIG. 2 shows a transmission mechanism between the motor and the transport wheels 21 as an example of the driving method of the transport wheels 21.
In this embodiment, the traveling motor 22 is arranged substantially in the center of the roller frame 20, and the axial direction of the rotation axis by the traveling motor 22 is substantially orthogonal.
Further, the rotation of the traveling motor 22 by the rotating shaft is configured to rotate the traveling shaft of each transport wheel 21 with the substantially horizontal direction as the rotation axis direction by using a known transmission mechanism such as a pinion 23 or a belt 24. As a result, the transport device A can travel.

<5.3> Steering mechanism (Fig. 2)
In the present invention, the transport wheel 21 may be provided with a steering mechanism so that the traveling direction of the transport wheel 21 can be set in any direction.
In FIG. 2, the steering mechanism is provided with a steering motor 25, which is a member different from the traveling motor 22 described above, on the tip end side of the roller frame 20, and the rotation of the steering motor 25 is controlled by a conversion shaft 26 or the like. A known transmission mechanism is used to rotate the traveling shaft itself of the conveying wheel 21, so that the traveling direction of the conveying device A can be set to an arbitrary direction.

When the transport wheels 21 are provided at only one place, when the steering mechanism is driven, the trolley during transport receives a reaction force and tries to rotate to the opposite side in the steering direction, so that the operator or an assistant trolleys. However, if two or more transport wheels 21 are provided and each of them is configured to steer in parallel, the force that the trolley tries to rotate can be suppressed, and it is necessary to separately support the trolley. Is gone.

<6> Switching mechanism (Fig. 3)
The switching mechanism 30 is a mechanism for changing the relative position between the base frame 10 and the roller frame 20.
The switching mechanism 30 has a posture (insertion / removal posture) that enables the main body A1 to be inserted / removed between the mounting table X1 and the ground by changing the relative position between the base frame 10 and the roller frame 20 and the main body. The unit A1 has a function of mounting a trolley and switching between a posture (transport posture) capable of transporting.
In this embodiment, at least the lever 31 operated by the operator, the movable portion 32 operated by the lever 31, and the elastic member 33 interposed between the base frame 10 and the roller frame 20 are provided in the switching mechanism 30. Include and configure.

<6.1> Lever (Fig. 3)
The lever 31 is a member for shifting the main body A1 to an insertion / removal posture or a transport posture by an operation by an operator.
The lever 31 is configured to be switchable between at least a first posture and a second posture.
In this embodiment, the lever 31 is provided on the rear side of the main body A1, and the first posture is a laid-down state in which the lever 31 is tilted backward, and the second posture is the vertical direction of the lever 31 in the longitudinal direction. It is in an upright position.
The lever 31 is rotatably connected to the base frame 10 in order to take the two postures described above. One end side of the lever 31 serves as a gripping portion for the operator to grip and switch to each posture. Inside the roller frame 20, an arm portion 312 that operates in conjunction with the lever 31 is provided at a position facing the lever 31 and the base frame 10 with a rotation point 311 sandwiched between them, and is provided at the tip of the arm portion 312. A rotating body 313 is provided.

<6.2> Movable part (Fig. 3)
The movable portion 32 is at least a member that is interlocked with the lodging operation of the lever 31.
In this embodiment, the receiving portion 321 that is pushed by the rotating body 313 and moves in the front-rear direction when the lever 31 is set in the first posture (during the lodging operation), the receiving portion 321 and the roller frame 20. The movable portion 32 is configured by having at least a swinging body 323 that can swing the roller frame 20 up and down like a seesaw in response to the front-back movement of the receiving portion 321. There is.

<6.3> Elastic member (Fig. 3)
The elastic member 33 is a member interposed between the base frame 10 and the roller frame 20.
In the present invention, the elastic member 33 is in a compressed state (length) because the distance from the base frame 10 is narrowed by the roller frame 20 that rises when the lever 31 is set to the first posture (insertion / extraction posture). = L1) is maintained.
Further, when the first posture (insertion / removal posture) is changed to the second posture (transport posture), the compressed state is released by the restoring force of the elastic member 33 (length = L2> L1), and the movable posture is described. By returning the receiving portion 321 of the portion 32 to the original position close to the rotating body 313, the roller frame 20 is lowered with respect to the base frame 10 and functions as a position returning material for returning the two to a separated position. To do.
The elastic member 33 also functions as a suspension (shock absorber) in the transport posture (length = L2).

<7> Posture transition image (Fig. 4)
The transition of the posture of the main body A1 by the switching mechanism 30 will be described with reference to FIG.

<7.1> Hot-swap posture (Fig. 4 (a))
When the lever 31 is set to the first posture (downward state), the receiving portion 321 is pushed out by the rotating body 313 provided on the lever 31, and the receiving portion 321 is moved to one end of the rocking body 323 in conjunction with the movement of the receiving portion 321. The connected roller frame 20 is in a lifted state.
At this time, the only wheels that are in contact with the ground are the insertion / removal wheels 12, and the transfer wheels 21 provided on the roller frame 20 are in a floating state.
Further, the elastic member 33 interposed between the base frame 10 and the roller frame 20 is in a state of being compressed more than usual due to the proximity of the elastic members 33.
In the insertion / removal posture, the total height H1 of the main body A1 (the height from the ground contact position of the insertion / extraction wheel 12 to the mounting surface 11) is shorter than the height H from the ground to the mounting table X1 in the trolley to be transported. Is designed to.
Therefore, the main body A1 in the insertion / removal posture can be inserted / removed under the mounting table X1 constituting the carriage.

<7.2> Intermediate posture (Fig. 4 (b))
As the lever 31 is transitioned from the first posture to the second posture, the rotating body 313 provided on the lever 31 projects in the front-rear direction and releases the state in which the receiving portion 321 is pushed out and moves downward. To do.
At this time, the roller frame 20 descends due to the restoring force of the compressed elastic member 33 and the own weight of the roller frame 20, and in conjunction with this descent, one end of the rocking body 323 is lowered, and the receiving portion 321 is a rotating body. It will move in the direction opposite to the extrusion direction by 313.
As a result, first, the insertion / extraction wheel 12 and the transfer wheel 21 are both in contact with the ground.

<7.3> Transport posture (Fig. 4 (c))
Since the position of the roller frame 20 is fixed from the stage when the transport wheel 21 touches the ground in <7.2>, the base frame 10 is raised by the restoring force of the elastic member 33, and the insertion / removal wheel 12 is also It floats up and only the transport wheels 21 are in contact with the ground.
In this transport posture, the total height H2 of the main body A1 (the height from the ground contact position of the transport wheel 21 to the mounting surface 11) is longer than the height H from the ground to the mounting table X1 in the carriage to be transported. It is designed.
Therefore, the main body A1 in the insertion / removal posture can lift the mounting table X1 constituting the carriage from below so that it can be conveyed.

<8> Image of use (Figs. 5 and 6)
An image of using the transport device A according to the present invention will be described with reference to FIGS. 5 and 6.

<8.1> Transport of transported goods (Fig. 5)
The transport device A according to the present invention can lift and transport the trolley with the transported object mounted on the mounting table X1 as it is.
The trolley shown in FIG. 5 is a six-wheel trolley, and includes a mounting table X1 having a substantially rectangular shape in a plan view.
Further, the mounting table X1 is loaded with a transported object that is longer than the long side direction of the mounting table X1.
With respect to this trolley, the main body A1 of the transport device A is inserted between the wheels on the intermediate side and the wheels on one end side in the insertion / removal posture, and the lever 31 is raised to switch to the transport posture. Lift the trolley together with the transported object so that it can be transported.
As described above, the transport device A according to the present invention can carry out the transport work without any interference with the transported object longer than the long side direction of the mounting table X1.

<8.2> When not in use (Fig. 6)
FIG. 6 shows a transport device A in a state in which the operation unit A2 is folded with respect to the main body unit A1.
When the transport device A is not used, the operation unit A2 can be folded to be compactly accommodated as shown in FIG.
At this time, as shown in FIG. 6, if a handle 13 is separately provided at the rear end of the main body A1, it is convenient to raise and store the folded transport device A.

A: Transport device for trolleys (conveyor device)
A1: Main body 10: Base frame 11: Mounting surface 12: Insertion / removal wheel 13: Handle 20: Roller frame 21: Transport wheel 22: Traveling motor 23: Pinion 24: Belt 25: Steering motor 26: Conversion shaft 30 : Switching mechanism 31: Lever 311: Rotation point 312: Arm 313: Rotating body 32: Movable part 321: Receiving part 322: Link 323: Swinging body 33: Elastic member A2: Operation part 40: Controller 50: Battery X: Cart X1: Mounting stand

Claims (7)

It is a transport device for trolleys
It has at least a main body that can be inserted under the mounting table that makes up the dolly.
The main body
A base frame having at least a mounting surface for mounting the dolly and an insertion / removal wheel used for insertion into the above-mentioned pedestal.
A roller frame and a roller frame having at least transport wheels used when transporting the trolley.
It has at least a switching mechanism that can change the relative position between the base frame and the roller frame.
The switching mechanism has the main body,
An insertion / removal posture that enables insertion / removal between the above-mentioned pedestal and the ground in a state where the insertion / removal wheels are in contact with the ground and the transfer wheels are separated from the ground.
A transport posture in which the height of the mounting surface is raised to mount the dolly on the mounting surface, the insertion / removal wheels are separated from the ground, and the transport wheels are in contact with the ground.
The feature is that it can be switched to
Transport device for trolleys. The switching mechanism
At least, with a lever that can switch between the first and second postures,
A moving part operated by the lever and
An elastic member interposed between the base frame and the roller frame,
Including at least
In the first posture,
The movable portion is pushed by the end of the lever to attract the roller frame to the base frame, and the elastic member is compressed to maintain the insertion / removal posture.
In the second posture,
The position where the base frame and the roller frame are separated by returning the movable portion pressed by the end of the lever in the first posture to the original position by the restoring force of the elastic member. Return to and maintain the transport posture.
The elastic member functions as a suspension interposed between the transport wheel and the mounting surface in the transport posture.
The trolley transport device according to claim 1. A motor for traveling on the transport wheels is provided.
The trolley transport device according to claim 1 or 2. A steering mechanism capable of setting the traveling direction of the transport wheel in an arbitrary direction is provided.
The trolley transport device according to any one of claims 1 to 3. An operation unit attached to the main body is further provided so as to stand at least with respect to the main body.
The operation unit is provided with a controller for operating the transfer wheel.
The trolley transport device according to any one of claims 1 to 4. The operation portion is configured to be foldable so as to lie down with respect to the main body portion.
The trolley transport device according to claim 5. A method for transporting a transported object using the transport device for a trolley according to claims 1 to 6.
The trolley transport device is inserted from the long side of the trolley into the trolley on which a transported object longer than the long side of the trolley is placed.
The trolley and the transported object are collectively transported by the transport wheels.
How to transport the goods.