JP7829840B2 - Transport cart - Google Patents

Description

This invention relates to a transport trolley for transporting elevator or passenger conveyor components that have been temporarily stacked during installation work to another location. This invention is suitable for transporting long components such as elevator guide rails and passenger conveyor truss frames.

These types of long components are typically packaged in bulk at the factory, transported to the installation site, and then transferred one by one onto flatbed carts for further transport. This transport process is performed by workers, and there is a risk of accidents such as dropping the components or pinching fingers during the transfer.

Furthermore, flatbed carts are low to the ground and have a simple structure. Therefore, the tasks of loading objects onto the flatbed cart, and then pushing the cart while navigating steps and obstacles within the worksite to move it to another location, are physically demanding.

Furthermore, there are transport trolleys for transporting long objects, as described in Patent Documents 1 and 2. However, in both cases, the loading of the transport object is done using lifting equipment such as an overhead crane, and therefore, they cannot be used at sites where this type of lifting equipment is not installed.

Japanese Patent Application Publication No. 7-215693 Japanese Unexamined Patent Publication No. 7-18868

Therefore, the present invention has been made in view of these circumstances, and aims to provide a transport cart that is versatile, easy to use, and can significantly reduce the workload of workers.

The transport trolley according to the present invention is
A transport trolley for transporting components of an elevator or passenger conveyor,
A wheeled base with a horizontally elongated front section,
The base is movable in the forward and backward direction within a predetermined range from the front to the rear of the base, and the movement is manually operated, provided that the lock is released.
A fixed section is positioned at the rear of the base so as to face the movable part, and houses the control unit, power supply, and electrical system inside.
The front side of the movable part is a lifting mechanism that can move up and down,
It is equipped with a claw that is attached to the lifting mechanism, and when the lifting mechanism descends with the movable part in the forward position, it passes the upper edge of the front of the base and moves below the upper edge ,
The movable part has a vertically elongated rectangular rear surface.
The fixed part has a vertically elongated rectangular shape and a front surface with a width similar to that of the rear surface of the movable part.
The movable part has a stepped portion on the upper part of the rear surface, which is the surface facing the fixed part.
When the movable part is retracted, a separation space is formed between the movable part and the fixed part by the stepped portion.
It is a transport cart.

As one embodiment of the transport trolley according to the present invention,
The movable part can be configured such that the claw portion can be retracted while positioned above the upper edge of the front surface of the base portion.

As one embodiment of the transport trolley according to the present invention,
The movable part is equipped with a handle used to move the movable part forward or backward.
This configuration can be adopted.
Also, in this case,
The movable part features a lever that allows for unlocking while your hand is resting on the handle.
This configuration can be adopted.

As one embodiment of the transport trolley according to the present invention,
The claw portion can be configured to be expandable and contractible in the front-to-back direction by the movement of the expandable and contractible portion as the expandable and contractible portion moves in the front-to-back direction relative to the fixed body, and the claw portion includes a fixed body that is attached to the lifting and lowering section and has comb-shaped pieces that interlock with the comb portion of the fixed body to form a single plane.

As one embodiment of the transport trolley according to the present invention,
The claw portion consists of a mounting surface whose length in the front-to-back direction is 20 mm to 150 mm longer than the width of the longer component, and a single piece having a bent piece that extends upward at the tip.
This configuration can be adopted.

According to this invention, the object to be transported can be lifted by lowering the claw portion, inserting it under the object to be transported, and then lifting the object by moving the transport trolley. Therefore, this invention offers versatility, ease of use, and significantly reduces the workload on the operator.

Figure 1 is a perspective view of the transport cart from a diagonal front angle. Figure 2 is a perspective view of the transport cart from the rear at an oblique angle. Figure 3 is a side view of the transport trolley. Figure 4(a) is a perspective view of the transport trolley with the claws in their furthest forward and lowest raised positions. Figure 4(b) is a side view of the transport trolley with the claws in their furthest forward and lowest raised positions. Figure 5(a) is a perspective view of the transport trolley with the claws in their fully retracted and minimum raised position. Figure 5(b) is a side view of the transport trolley with the claws in their fully retracted and minimum raised position. Figure 6(a) is a perspective view of the movable mechanism of the movable part in its furthest forward position. Figure 6(b) is a perspective view of the movable mechanism of the movable part in its furthest retracted position. Figure 7 is a perspective view of the lifting mechanism. Figure 8(a) is a perspective view of the claw portion. Figure 8(b) is an exploded perspective view of the claw portion. Figure 9(a) is a partial perspective view of the base with the stand attached. Figure 9(b) is a partial perspective view of the base with the stand removed. Figures 10(a) to 10(c) are explanatory diagrams of the elevator guide rail transport method. Figure 11 is an explanatory diagram.

The work platform according to this embodiment will be described below.

As shown in Figures 1 to 3, the work cart 1 comprises a base 2, a movable part 3, a fixed part 4, a lifting part 5, and a claw part 6. The base 2 is equipped with wheels 20 and is capable of traveling on the floor. The movable part 3 is mounted on the base 2 so as to be movable in the front-rear direction within a predetermined range from the front 2a to the rear of the base 2. In this embodiment, the movement of the movable part 3 is performed manually by the operator. The fixed part 4 is positioned at the rear of the base 2, facing the movable part 3. The lifting part 5 is mounted on the front 3a side of the movable part 3 so as to be movable in the vertical direction. In this embodiment, the movement of the lifting part 5 is performed electrically (automatically) by the driving force of a drive source. The claw part 6 is attached to the lifting part 5 and is movable in the front-rear and vertical directions in conjunction with the movement of the movable part 3 and the lifting part 5.

The base portion 2 has a rectangular parallelepiped shape and includes a front surface 2a, left and right side surfaces 2b, 2b, a top surface 2c, and a bottom surface 2d. The length in the front-to-back direction is greater than the width in the left-to-right direction, and the width in the left-to-right direction is greater than the height in the up-to-down direction. Therefore, the base portion 2 has a rectangular parallelepiped shape that is elongated horizontally in the front-to-back direction and has an aspect ratio (height/width) less than 1. The front surface 2a has a horizontally elongated rectangular shape in the left-to-right direction. The side surfaces 2b have a horizontally elongated rectangular shape in the front-to-back direction. The top surface 2c is an opening surface demarcated by the upper edges of the front surface 2a and side surfaces 2b.

The wheels 20 are mounted at the four corners of the lower surface 2d. Each wheel 20 is a swivel wheel, allowing its direction to be freely changed. Each wheel 20 is equipped with a stopper to restrict rotation. Note that the two rear or front wheels (front or rear) 20 may be fixed wheels. Furthermore, there may be a total of three wheels 20, such as two in the front and one in the rear, or one in the front and two in the rear.

The base unit 2 is equipped with handles 21 on its left and right sides 2b, 2b. The handles 21 are long in the front-to-back direction. The handles 21 are used when moving the transport trolley 1.

The movable part 3 has a rectangular parallelepiped shape and includes a front surface 3a, left and right side surfaces 3b, 3b, a top surface 3c, and a rear surface 3d. The height dimension in the vertical direction is greater than the width dimension in the horizontal direction, and the width dimension in the horizontal direction is greater than the length dimension in the front-to-back direction. Therefore, the movable part 3 has a rectangular parallelepiped shape that is vertically elongated in the vertical direction and has an aspect ratio (length dimension/width dimension) less than 1. The front surface 3a has a vertically elongated rectangular shape. The side surfaces 3b have a vertically elongated rectangular shape. The top surface 3c has a horizontally elongated rectangular shape. The rear surface 3d has a vertically elongated rectangular shape. The upper part of the rear surface 3d is offset towards the front surface 3a side, forming a stepped portion 3e.

The movable part 3 is equipped with handles 31 on its left and right sides 3b, 3b. The handles 31 are long in the vertical direction. The handles 31 are used when moving the transport cart 1, but their vertical position (height) is set in relation to the center of gravity of the transport cart 1 to prevent it from tipping over laterally.

The movable part 3 is equipped with a handle 32 on its upper surface 3c. The handle 32 is long in the left-right direction. The handle 32 is used when moving the movable part 3 forward or backward. A lever 33 is provided near the handle 32, allowing the user to grip (pull) the lever 33 while holding the handle 32. The lever 33 is connected to a stopper (not shown) that restricts the movement of the movable part 3. Operating the lever 33 releases the lock from the stopper, allowing the movable part 3 to move. Releasing the lever 33 locks the movable part 3, fixing it in place and preventing further movement.

The fixed part 4 has a rectangular parallelepiped shape and includes a front surface 4a, left and right side surfaces 4b, 4b, a top surface 4c, and a rear surface 4d. The vertical height dimension is greater than the horizontal width dimension, and the horizontal width dimension is greater than the front-to-back length dimension. Therefore, the fixed part 4 has a rectangular parallelepiped shape that is vertically elongated in the vertical direction and has an aspect ratio (length dimension/width dimension) less than 1. The front surface 4a has a vertically elongated rectangular shape. The side surfaces 4b have a vertically elongated rectangular shape. The top surface 4c has a horizontally elongated rectangular shape. The rear surface 4d has a vertically elongated rectangular shape. The fixed part 4 has a height difference Δh, meaning its vertical height dimension is smaller than that of the movable part 3.

The fixing section 4 is equipped with handles 41 on its left and right sides 4b, 4b. The handles 41 are long in the vertical direction. The handles 41 are used when moving the transport trolley 1, but their vertical position (height) is set in relation to the center of gravity of the transport trolley 1 to prevent it from tipping over laterally.

The fixing part 4 is equipped with a handle 42 on its upper surface 4c. The handle 42 is long in the left-right direction. The handle 42 is used when moving the transport trolley 1. An operation button 43 is provided near the handle 42. The operation button 43 includes an up button, a down button, and a stop button. The up button raises the lifting unit 5. The down button lowers the lifting unit 5. The stop button stops the lifting and lowering of the lifting unit 5. However, if the lifting operation circuit of the lifting unit 5 is designed to operate only while the up button and down button are pressed, the stop button is unnecessary.

The rear section 4d is designed to open and close with a cover, allowing access to the inside of the fixing section 4. The fixing section 4 houses the control unit, power supply (battery), and electrical system. Therefore, the fixing section 4 is a relatively heavy object and also functions as a counterweight when the transport trolley 1 is lifted.

The lifting section 5 comprises a base plate 50 and an extension arm 51. The base plate 50 has a horizontally elongated rectangular shape and is positioned on the front surface 3a of the movable section 3, oriented vertically along the front surface 3a. The extension arm 51 is attached to the front surface of the base plate 50 and is provided to protrude downward from the base plate 50.

The lifting section 5 is equipped with indicators 52 on the left and right sides of the base plate 50. Correspondingly, the movable section 3 is equipped with marks 35 on its left and right sides 3b, 3b. The marks 35 and indicators 52 indicate the height position of the lifting section 5 (hereinafter referred to as the minimum raised position) at which the movable section 3 can retract without the claw portion 6 interfering with the base section 2 (its front surface 2a), by positioning the claw portion 6 above the upper edge and upper surface 2c of the front surface 2a of the base section 2.

The claw portion 6 is attached to the lower part of the lifting section 5. Specifically, the claw portion 6 is attached to the lower part of the extension arm 51 of the lifting section 5. The claw portion 6 is attached to the lifting section 5 such that, at its lowest position, the distance between the upper end of the tip of the claw portion 6 (the upper edge of the bent piece 61a of the telescopic body 61, described later) and the floor surface (which coincides with the surface that contacts the wheel 20 from below) is 100 mm or less, 80 mm or less, or 60 mm or less.

The claw portion 6 is a single unit and is positioned in the center in the left-right direction. That is, the left-right width dimensions of the movable portion 3, fixed portion 4, and lifting portion 5 are approximate, and the left-right width dimension of the transport trolley 1 is defined by these left-right width dimensions. Therefore, the claw portion 6 is positioned in the center in the left-right direction of the transport trolley 1. More specifically, the claw portion 6 is positioned so that its left-right center coincides with the left-right center of the transport trolley 1. However, the claw portion 6 may be positioned at a location offset to the left or right of the left-right center of the transport trolley 1.

Based on the above configuration, the transport trolley 1 can be transformed into three main states: i) a state in which the movable part 3 (and the lifting part 5 and the claw part 6) is in its furthest forward position and the lifting part 5 (and the claw part 6) is in its lowest position (see Figures 1 to 3); ii) a state in which the movable part 3 (and the lifting part 5 and the claw part 6) is in its furthest forward position and the lifting part 5 (and the claw part 6) is in its lowest position (see Figure 4); and iii) a state in which the movable part 3 (and the lifting part 5 and the claw part 6) is in its furthest retracted position and the lifting part 5 (and the claw part 6) is in its lowest position (see Figure 5). Of course, it goes without saying that the movable part 3 can move and stop at any position between the furthest forward position and the furthest retracted position, and that the lifting part 5 can move and stop at any position between the lowest position and the highest position. Note that the forwardmost position, backwardst position, lowest position, and highest position refer to positions that cannot be moved any further physically (mechanically or electrically controlled).

Figure 6 shows an example of the movement mechanism of the movable part 3. The movement mechanism of the movable part 3 includes guide bodies 22 and 23 on the base 2 side, and slide bodies 36 and 37 on the movable part 3 side. The guide bodies 22 are a pair of guide rods arranged within the base 2 with their centerlines aligned in the front-rear direction and spaced apart in the left-right direction. The slide bodies 36 are carriages that slidably engage with each guide body 22, and the guide bodies 22 and slide bodies 36 are in the form of a linear guide. The guide body 23 is a guide rail arranged within the base 2 with its centerline aligned in the front-rear direction and between the pair of guide bodies 22, 22. The slide body 37 is a carriage that slidably engages with the guide body 23, and the guide bodies 23 and slide bodies 37 are in the form of a linear guide. By attaching the slide bodies 36 and 37 to the lower surface of the base plate 30 of the movable part 3, the movable part 3 becomes capable of moving in a straight line in the front-rear direction.

Figure 7 shows an example of the movement mechanism of the lifting section 5. The movement mechanism of the lifting section 5 includes a drive mechanism 38 on the movable section 3 side. The drive mechanism 38 comprises a cylinder 380, a rod 381, a sprocket 382, a chain 383, and a guide roller 384.

The cylinder 380 is positioned within the movable part 3 such that its centerline aligns vertically and the cylinder rod extends upward. The rod 381 is positioned within the movable part 3 such that its centerline aligns horizontally (perpendicular to the direction of extension and retraction of the cylinder rod), and is attached to the tip of the cylinder rod at its center. The rod 381 has a circular cross-section. The sprocket 382 is coaxially and rotatably attached to two locations on either side of the rod 381, sandwiching the cylinder rod. The chain 383 has one end fixed directly or indirectly via a bracket to the back surface of the base plate 50 of the lifting section 5, wrapped around the sprocket 382, and the other end fixed within the movable part 3. Guide rollers 384 are attached to both ends of the rod 381 and are guided vertically by guides within the movable part 3. The control unit within the fixed section 4 controls the extension and retraction amount of the cylinder rod of the cylinder 380, enabling the lifting section 5 to move linearly vertically.

The lever 33 is connected to a stopper (not shown) via a wire 34. The stopper is in the form of an axially movable pin. The stopper is located at the bottom of the movable part 3 and, due to the elastic force of an elastic body, extends and locks into a hole (not shown) formed in the base part 2. When the lever 33 is squeezed, the tip of the stopper, pulled via the wire 34, disengages from the hole, releasing the lock.

As shown in Figure 8, the claw portion 6 is retractable, and its length in the front-to-back direction can be changed. The claw portion 6 comprises a fixed body 60 and a retractable body 61.

The fixed body 60 comprises one piece formed by bending the central part of a single metal plate into a comb-like shape, and the other piece serving as a bent piece 60a. One piece is positioned horizontally and is the portion on which the object to be transported is placed. The bent piece 60a is positioned vertically and is the portion attached to the lifting unit 5 (specifically, its extension arm 51).

The expandable body 61 comprises one end of a single metal plate bent to form a comb-like shape, and the other end as a bent piece 61a. One end is positioned horizontally and interlocks with the comb portion of one end of the fixed body 60 to form a single plane, which is the surface on which the object to be transported is placed. The bent piece 61a is positioned vertically and faces the bent piece 60a of the fixed body 60. The object to be transported is prevented from falling off the claw portion 6 by the pair of bent pieces 60a and 61a.

The fixed body 60 is equipped with a stopper 60b. The stopper 60b is in the form of an axially movable pin. The stopper 60b extends due to the elastic force of the elastic body, and when inserted into the slit hole 61b formed in the expandable body 61, it locks, fixing the expandable body 61 and preventing its movement. When the stopper 60b is pulled, its tip disengages from the slit hole 61b, releasing the lock and allowing the expandable body 61 to move again.

The distance between the pair of bent pieces 60a and 61a when fully open is set to be at least [width of the object being transported (maximum size 140 mm for elevator guide rails) + 20 mm] and no more than [width of the object being transported + 150 mm]. This ensures that the claw portion 6 has a mounting surface that is neither too short nor too long relative to the width of the object being transported.

As shown in Figure 9, the base unit 2 is equipped with a stand 24. The stand 24 is positioned in front of the front wheels 20 and partially contacts the floor surface, preventing the transport cart 1 from losing balance and tipping forward due to the weight of the transported object during lifting. The stand 24 is equipped with a pair of pins 24a, 24a that are inserted into a pair of holes 2e, 2e formed on the side surface 2b of the base unit 2, and is detachably attached to the base unit 2. Alternatively, the stand 24 can be attached to the base unit 2 rotated 180 degrees so that the contact portion (arm in the illustrated example) is above the floor surface, thus ensuring that the transport cart 1 does not interfere with its movement. Note that the pins may be provided on the side surface 2b of the base unit 2, and the holes may be formed in the stand.

The transport trolley 1 according to this embodiment has the above configuration, and next, the method of use (transportation method) will be described. As shown in Figure 10, the object to be transported is, as an example, an elevator guide rail R, which is placed on a pair of wooden blocks W, W placed parallel to each other at a distance on the floor surface, thereby lifting it off the floor surface and stacking it flat.

The transport method according to this embodiment is specifically designed for removing and transporting guide rails R one by one from a flat stack.
a) Turning on the power to the transport trolley 1 b) Moving the transport trolley 1 to the side of the guide rail R c) Grasping the handle 33 and moving the movable part 3 forward (to the furthest forward position) (see Figure 4)
d) Press the down button 43 to lower the lifting unit 5 (to the lowest position) (see Figures 1 and 10(a)).
e) Moving the transport trolley 1 or the movable part 3 so that the claw portion 6 is positioned below the guide rail R (see Figure 10(b)).
f) Press the lift button 43 to raise the lifting section 5 (to the minimum lifted position) and lift the guide rail R (see Figures 10(c) and 4).
g) The step of gripping the handle 33 and retracting the movable part 3 (to its fully retracted position) (see Figure 5)
h) The process of transporting the guide rail R to another location (see Figure 11)
i) The process of gripping the handle 33 and moving the movable part 3 forward (to the furthest forward position) (see Figures 10(c) and 4).
j) Press the lowering button 43 to lower the lifting section 5 (to its lowest position) and lower the guide rail R onto the wooden platform or flatbed cart (see Figures 1, 10(c), and (b)).
k) A step of moving the transport trolley 1 or movable part 3 so that the claw portion 6 is removed from below the guide rail R (see Figure 10(a)).
l) Press the lift button 43 to raise the lifting unit 5 (to the minimum lifted position) (see Figure 4)
m) The step of gripping the handle 33 and retracting the movable part 3 (to its fully retracted position) (see Figure 5)
It is equipped with.

As described above, according to the transport trolley 1 of this embodiment, the guide rail R can be lifted by lowering the claw portion 6, inserting the claw portion 6 under the guide rail R, and then lifting the guide rail R by moving the transport trolley 1. Therefore, the transport trolley 1 of this embodiment is versatile, easy to use, and significantly reduces the workload of the operator.

According to the transport trolley 1 of this embodiment, by raising and then retracting the claw portion 6, the guide rail R can be brought closer to the center of gravity of the transport trolley 1. Therefore, with the transport trolley 1 of this embodiment, the transport trolley 1 will not lose its balance and tip over, and the guide rail R can be transported stably.

According to the transport trolley 1 of this embodiment, because of the front surface 2a of the base portion 2, the claw portion 6 cannot be retracted unless it is raised above the upper edge of the front surface 2a. In other words, the claw portion 6 cannot be retracted while remaining in its low position because it interferes with the front surface 2a. This prevents the guide rail R from colliding with the base portion 2 and detaching from the claw portion 6, which can occur if the claw portion 6 is retracted while remaining in its low position. In this respect as well, the transport trolley 1 of this embodiment allows for stable transport of the guide rail R.

In the transport trolley 1 according to this embodiment, the fixed part 4 is positioned at the rear of the base part 2 so as to face the movable part 3. The control unit, power supply, and electrical system are housed within the fixed part 4, making it a somewhat heavy component. Therefore, the fixed part 4 also functions as a weight when the transport trolley 1 is lifted. Thus, the transport trolley 1 according to this embodiment prevents the transport trolley 1 from tipping forward due to the weight of the guide rail R during lifting. This effect can also be achieved by using the stand 24.

According to the transport trolley 1 of this embodiment, the movable part 3 is provided with a stepped portion 3e on the upper part of its rear surface 3d. When the movable part 3 is retracted, a separation space is formed between the movable part 3 and the fixed part 4 by the stepped portion 3e. Therefore, with the transport trolley 1 of this embodiment, it is possible to prevent arms or fingers from being caught when the movable part 3 is retracted. This effect can also be achieved by having the movable part 3 have a greater height dimension than the fixed part 4, with a height difference Δh.

According to the transport trolley 1 of this embodiment, the claw portion 6 is configured to be extendable and retractable in the front-rear direction. Therefore, the transport trolley 1 of this embodiment can accommodate differences in the size of the objects being transported.

Furthermore, the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

In the above embodiment, two transport carts are used as a set because the object to be transported is long. However, the present invention is not limited to this. If the object to be transported is not long and can be lifted and transported with a single transport cart, then only one transport cart may be used.

When two transport carts are used as a set, the control unit of each transport cart may be equipped with a communication unit consisting of a transmitter and a receiver. In this case, when the operation button 43 of one transport cart is pressed, the control unit of one transport cart sends a movement command signal (up command signal or down command signal) to its own drive mechanism 38, and simultaneously transmits the same movement command signal (up command signal or down command signal) wirelessly to the receiver of the other transport cart via the transmitter. Upon receiving this, the control unit of the other transport cart then sends a movement command signal (up command signal or down command signal) to its own drive mechanism 38. This sequence allows the claws 6 of both transport carts to be raised and lowered synchronously simply by operating the operation button (operation unit) 43 of one transport cart.

In the above embodiment, the movement of the movable part 3 is performed manually. However, the present invention is not limited to this. The movement of the movable part 3 may also be performed electrically (automatically) by the driving force of a drive source, similar to the movement of the lifting part 5. In this case, it is preferable that the control unit uses a sensor or the like to determine the minimum raised position of the lifting part 5, and employs a sequence such that an interlock is activated to restrict the retraction of the movable part 3 when the lifting part 5 is positioned below the minimum raised position. Furthermore, even if manual operation is performed, this interlock circuit can be replaced by a combination of the mark 35 and indicator 52.

In this invention, terms that specify shapes, parts, states, or directions, such as "rectangular," "rectangular," "straight," "center," "center," "end," "coincident," "same," "horizontal," "vertical," "orthogonal," "up and down," "front and back," and "left and right," include not only the terms themselves but also the concept of "abbreviation," meaning something similar or analogous.

1... Transport cart, 2... Base, 2a... Front, 2b... Side, 2c... Top, 2d... Bottom, 2e... Hole, 20... Wheel, 21... Handle, 22... Guide body, 23... Guide body, 24... Stand, 24a... Pin, 3... Movable part, 3a... Front, 3b... Side, 3c... Top, 3d... Rear, 3e... Stepped part, 30... Base plate, 31... Handle, 32... Handle, 33... Lever (operating body), 34... Wire, 35... Mark, 36... Slide body, 37... Slide body, 38... Drive mechanism, 380... C Linda, 381…Rod, 382…Sprocket, 383…Chain, 384…Guide Roller, 4…Fixed Part, 4a…Front, 4b…Side, 4c…Top, 4d…Rear, 41…Handle, 42…Handle, 43…Operation Button (Operation Part), 5…Lifting Part, 50…Base Plate, 51…Extendable Arm, 52…Indicator, 6…Claw Part, 60…Fixed Body, 60a…Folding Piece, 60b…Stopper, 61…Telescopic Body, 61a…Folding Piece, 61b…Slit Hole, R…Guide Rail, W…Wooden Piece

Claims (6)

A transport trolley for transporting components of an elevator or passenger conveyor,
A wheeled base with a horizontally elongated front section,
The base is movable in the forward and backward direction within a predetermined range from the front to the rear of the base, and the movement is manually operated, provided that the lock is released.
A fixed section is positioned at the rear of the base so as to face the movable part, and houses the control unit, power supply, and electrical system inside.
The front side of the movable part is a lifting mechanism that can move up and down,
It is equipped with a claw that is attached to the lifting mechanism, and when the lifting mechanism descends with the movable part in the forward position, it passes the upper edge of the front of the base and moves below the upper edge ,
The movable part has a vertically elongated rectangular rear surface.
The fixed part has a vertically elongated rectangular shape and a front surface with a width similar to that of the rear surface of the movable part.
The movable part has a stepped portion on the upper part of the rear surface, which is the surface facing the fixed part.
When the movable part is retracted, a separation space is formed between the movable part and the fixed part by the stepped portion.
Transport cart. The transport trolley according to claim 1, wherein the movable part is retractable when the claw portion is positioned above the upper edge of the front surface of the base portion. The transport trolley according to claim 1 or claim 2 , wherein the movable part is provided with a handle used when moving the movable part forward or backward. The transport trolley according to claim 3 , wherein the movable part is equipped with a lever that can be unlocked while a hand is placed on the handle. The transport trolley according to claim 1, wherein the claw portion comprises a fixed body attached to the lifting section and having comb-shaped pieces, and an extendable body having comb-shaped pieces that interlock with the comb portion of the fixed body to form a single plane, and the extendable body is configured to extend and retract in the front-rear direction as the extendable body moves in the front-rear direction relative to the fixed body. The claw portion consists of a mounting surface whose length in the front-to-back direction is 20 mm to 150 mm longer than the width of the longer component, and a single piece having a bent piece that extends upward at the tip.
A transport trolley according to claim 1 or claim 5 .