Transport cart

Abstract

To provide a carrying truck and a carrying method having versatility and good usability, and capable of largely reducing a work burden of a worker.SOLUTION: A conveyance cart 1 for conveying a component of an elevator or a passenger conveyor includes a base part 2 with wheels 20 having a front 2a elongated in a left-right direction, a movable part 3 movable in a front-rear direction on the base part 2 within a predetermined range rearward from the front 2a of the base part 2, a lifting part 5 movable in an up-down direction on the front 3a side of the movable part 3, and a claw part 6 attached to the lifting part 5 and configured to pass through an upper edge of the front 2a of the base part 2 and move below the upper edge when the lifting part 5 is lowered with the movable part 3 moved forward.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a carrier for transporting components of an elevator or a passenger conveyor temporarily stacked during installation work or the like to another location. In the car The present invention is suitable for transporting long components such as elevator guide rails and passenger conveyor truss frames.

Background Art

[0002] A plurality of such long components are packed together at a factory or the like, transported to the installation site, transferred one by one onto a flatbed cart, and then transported to another location. This transportation work is carried out by workers, and problems such as dropping and pinching hands may occur during the transfer.

[0003] In addition, the flatbed cart is low in height and has a simple structure. Therefore, the work of loading the object to be transported onto the flatbed cart and the work of pushing the flatbed cart with the object to be transported while avoiding steps and obstacles in the site and moving it to another location are heavy labor.

[0004] As carrier trucks for transporting long objects to be transported, there are those described in Patent Document 1 and Patent Document 2. However, in any of the carrier trucks, the work of loading the object to be transported is carried out by a unloading device such as an overhead crane, and it cannot be used at a site where this type of unloading device is not installed.

Prior Art Documents

Patent Documents

[0005] [

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, the present invention has been made in view of these circumstances, and provides a transport platform that is versatile, easy to use, and can significantly reduce the workload of workers. car The challenge is to provide it. [Means for solving the problem]

[0007] 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 moves below the upper edge of the front of the base when the lifting mechanism is lowered while the movable part is in the forward position. 、 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.

[0008] As one embodiment of the transport trolley according to the present invention, The movable part can be retracted when the claw is positioned above the upper edge of the front surface of the base. This configuration can be adopted.

[0011] 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.

[0012] As one aspect of the transport cart according to the present invention, The claw part is The system comprises a fixed body attached to a lifting mechanism 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, wherein the extendable body moves in the front-rear direction relative to the fixed body, configured to be telescopic in the front-rear direction and can adopt such a configuration.

[0013] As one aspect of the transport cart according to the present invention, The claw part ,before has a placement surface that is 20 mm or more and 150 mm or less longer than the width of a component having a long length in the rear direction and a bent piece extending upward at the tip. and one one side Composed of and can adopt such a configuration.

Effects of the Invention

[0016] According to the present invention, after lowering the claw part and inserting the claw part under the object to be transported, by raising the claw part, the object to be transported can be lifted, and then by running the transport cart, the object to be transported can be transported. Therefore, according to the present invention, it has versatility, is easy to use, and can greatly reduce the work burden of the operator.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 1 is a perspective view of the transport cart as seen from obliquely in front. [Figure 2] FIG. 2 is a perspective view of the transport cart as seen from obliquely in the rear. [Figure 3] FIG. 3 is a side view of the transport cart. [Figure 4] FIG. 4(a) is a perspective view of the transport cart with the claw part in the most forward position and the lowest raised position. FIG. 4(b) is a side view of the transport cart with the claw part in the most forward position and the lowest raised position. [Figure 5] FIG. 5(a) is a perspective view of the transport cart with the claw part in the most rearward position and the lowest raised position. FIG. 5(b) is a side view of the transport cart with the claw part in the most rearward position and the lowest raised position. [Figure 6]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] Figure 7 is a perspective view of the lifting mechanism. [Figure 8] 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] 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. [Figure 10] Figures 10(a) to 10(c) are explanatory diagrams of the elevator guide rail transport method. [Figure 11] Figure 11 is an explanatory diagram. [Modes for carrying out the invention]

[0018] The work platform according to this embodiment will be described below.

[0019] 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 provided so as to be movable in the front-rear direction on the base 2 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 an operator. The fixed part 4 is positioned at the rear of the base 2 so as to be opposite the movable part 3. The lifting part 5 is provided so as to be movable in the vertical direction on the front 3a side of the movable part 3. 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 capable of moving in the front-rear and vertical directions in conjunction with the movement of the movable part 3 and the lifting part 5.

[0020] 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 dimension in the front-to-back direction is greater than the width dimension in the left-to-right direction, and the width dimension in the left-to-right direction is greater than the height dimension in the up-to-down direction, so 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 dimension / width dimension) of 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 open surface demarcated by the upper edges of the front surface 2a and side surfaces 2b.

[0021] The wheels 20 are mounted at the four corners of the lower surface 2d. Each wheel 20 is a swivel wheel whose direction can be freely changed. Each wheel 20 is equipped with a stopper to restrict rotation. Note that the two wheels (front wheels or rear wheels) 20 on the rear or front side may be fixed wheels. Also, 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.

[0022] 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 you want to move the transport trolley 1.

[0023] 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, so 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) of less than 1. The front surface 3a has a vertically elongated rectangular shape in the vertical direction. The side surfaces 3b have a vertically elongated rectangular shape in the vertical direction. The top surface 3c has a horizontally elongated rectangular shape in the horizontal direction. The rear surface 3d has a vertically elongated rectangular shape in the vertical direction. The upper part of the rear surface 3d is offset towards the front surface 3a side and forms a stepped portion 3e.

[0024] 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 you want to move the transport cart 1, but their vertical position (height position) is set in relation to the center of gravity of the transport cart 1 to prevent the transport cart 1 from tipping over to the side.

[0025] 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 you want to move the movable part 3 forward or backward. A lever 33 is provided near the handle 32, and the lever 33 can be grasped (pulled) while your hand is on the handle 32. The lever 33 is connected to a stopper (not shown) that restricts the movement of the movable part 3. When the lever 33 is operated, the lock by the stopper is released, and the movable part 3 becomes movable. When you release your hand from the lever 33, the stopper locks it, fixing the movable part 3 in place and preventing it from moving.

[0026] 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 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, so 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) of less than 1. The front surface 4a has a vertically elongated rectangular shape in the vertical direction. The side surfaces 4b have a vertically elongated rectangular shape in the vertical direction. The top surface 4c has a horizontally elongated rectangular shape in the horizontal direction. The rear surface 4d has a vertically elongated rectangular shape in the vertical direction. The fixed part 4 has a height difference Δh, and its vertical height dimension is smaller than that of the movable part 3.

[0027] The fixing part 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 you want to move the transport cart 1, but their vertical position (height position) is set in relation to the center of gravity of the transport cart 1 to prevent the transport cart 1 from tipping over to the side.

[0028] The fixed 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 you want to move 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 is for raising the lifting unit 5. The down button is for lowering the lifting unit 5. The stop button is for stopping the raising 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 not necessary.

[0029] The rear section 4d is a cover that can be opened and closed, allowing access to the inside of the fixing section 4. The fixing section 4 houses the control unit, power supply (battery), and electrical system. As a result, the fixing section 4 is a relatively heavy object and also functions as a counterweight when the transport trolley 1 is lifted.

[0030] 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, and is positioned 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.

[0031] 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 claw portion 6 is positioned above the upper edge and upper surface 2c of the front surface 2a of the base section 2, allowing the movable section 3 to retract without the claw portion 6 interfering with the front surface 2a of the base section 2.

[0032] The claw portion 6 is attached to the lower part of the lifting section 5. That is, 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, or 80 mm or less, or 60 mm or less.

[0033] 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 part 3, the fixed part 4, and the lifting part 5 are approximate, and the left-right width dimension of the transport trolley 1 is defined by the left-right width dimensions of these movable part 3, fixed part 4, and lifting part 5. 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 such 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 from the left-right center of the transport trolley 1.

[0034] 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 furthest forward position, furthest backward position, lowest position, and highest position refer to positions that cannot be moved any further physically (mechanically or electrically controlled).

[0035] 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 part 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 part 2 with their centerlines aligned in the front-rear direction and spaced apart in the left-right direction, and 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 part 2 with its centerline aligned in the front-rear direction and between the pair of guide bodies 22, 22, and 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.

[0036] 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 includes a cylinder 380, a rod 381, a sprocket 382, ​​a chain 383, and a guide roller 384.

[0037] 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 in which the cylinder rod extends and retracts) 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 attached coaxially and rotatably to two locations on either side of the rod 381, sandwiching the cylinder rod. One end of the chain 383 is fixed directly or indirectly via a bracket to the back surface of the base plate 50 of the lifting section 5 and is wrapped around the sprocket 382, ​​while the other end is 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 amount of extension and retraction of the cylinder rod of the cylinder 380, enabling the lifting section 5 to move linearly vertically.

[0038] 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 is advanced by the elastic force of an elastic body. When it is inserted into a hole (not shown) formed in the base part 2, it locks into place. When the lever 33 is squeezed, the tip of the stopper, which is pulled via the wire 34, disengages from the hole, and the lock is released.

[0039] 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.

[0040] The fixed body 60 is formed by bending the central part of a single metal plate, and comprises one piece that is comb-shaped and the other piece that serves as a bent piece 60a. The one piece is positioned horizontally and is the part on which the object to be transported is placed. The bent piece 60a is positioned vertically and is the part that is attached to the lifting section 5 (the extension arm 51).

[0041] The expandable body 61 is formed by bending the end of a single metal plate, and comprises one piece that is comb-shaped and the other piece that serves as a bent piece 61a. One piece is positioned horizontally and interlocks with the comb portion of one piece of the fixed body 60 to form a single plane, which is the part on which the object to be transported is placed. The bent piece 61a is positioned vertically and is the part that 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, 61a.

[0042] The fixed body 60 is equipped with a stopper 60b. The stopper 60b is in the form of a pin that is movable in the axial direction. The stopper 60b advances due to the elastic force biased by the elastic body and, when inserted into the slit hole 61b formed in the expandable body 61, locks into place, fixing the expandable body 61 and preventing it from moving. When the stopper 60b is pulled, the tip of the stopper 60b disengages from the slit hole 61b, the lock is released, and the expandable body 61 becomes movable.

[0043] The distance between the pair of bent pieces 60a and 61a when they are fully open is set to be at least [width of the object being transported (maximum size 140 mm if it is an elevator guide rail) + 20 mm] and at least [width of the object being transported + 150 mm]. As a result, 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.

[0044] 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 a portion of it 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 in a state where the contact portion (arm in the illustrated example) is above the floor surface and does not interfere with the movement of the transport cart 1. The pins may be provided on the side surface 2b of the base unit 2, and the holes may be formed in the stand.

[0045] 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 that is placed on a pair of wooden blocks W, W placed parallel to each other at a distance from the floor surface, thereby being lifted off the floor surface and stacked flat.

[0046] 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) Step of turning on the power to the transport trolley 1 b) The process of moving the transport trolley 1 to the side of the guide rail R. c) The process of gripping 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 process 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 part 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 process of gripping the handle 33 and retracting the movable part 3 (to its fully retracted position) (see Figure 5) It is equipped with.

[0047] As described above, with the transport trolley 1 according to 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. For this reason, the transport trolley 1 according to this embodiment is versatile and easy to use, and can significantly reduce the workload of the operator.

[0048] 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, according to 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.

[0049] 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 because it interferes with the front surface 2a if it remains in a low position. As a result, the problem of the guide rail R colliding with the base portion 2 and falling off the claw portion 6 by retracting the claw portion 6 while it remains in a low position does not occur. In this respect as well, the transport trolley 1 of this embodiment can transport the guide rail R stably.

[0050] 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, and it is a certain weight. As a result, the fixed part 4 also functions as a weight when the transport trolley 1 is lifted. Therefore, in the transport trolley 1 according to this embodiment, the weight of the guide rail R prevents the transport trolley 1 from tipping forward when lifted. This effect can also be obtained by using the stand 24.

[0051] 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, so that 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, according to 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 obtained by the fact that the movable part 3 has a height difference Δh and is taller than the fixed part 4.

[0052] 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 to be transported.

[0053] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0054] 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.

[0055] 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 wirelessly transmits the movement command signal (up command signal or down command signal) to the receiver of the other transport cart via the transmitter. Upon receiving this, the control unit of the other transport cart 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.

[0056] In the above embodiment, the movement of the movable part 3 is performed manually. However, the present invention is not limited thereto. 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 it is manual, this interlock circuit can be replaced by a combination of the mark 35 and the indicator 52.

[0057] 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 alike. [Explanation of symbols]

[0058] 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...Sliding body, 37...Sliding body, 38...Drive mechanism, 380...S 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 (operating 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 block

Claims

1. 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.

2. The movable part can be retracted when the claw is positioned above the upper edge of the front surface of the base. The transport trolley according to claim 1.

3. The movable part is equipped with a handle used to move the movable part forward or backward. A transport trolley according to claim 1 or claim 2.

4. The movable part features a lever that allows for unlocking while your hand is resting on the handle. The transport trolley according to claim 3.

5. The claw portion comprises a fixed body attached to the lifting mechanism 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. The extendable body moves in the front-to-back direction relative to the fixed body, thereby enabling extension and retraction in the front-to-back direction. The transport trolley according to claim 1.

6. 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.

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