Transport vehicle and transport method

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 transport vehicle and a transport method for transporting elevator or passenger conveyor components that are temporarily stacked flat during installation work, etc. to another location. The present invention is suitable for transporting long components such as elevator guide rails and passenger conveyor truss frames. [Background technology]

[0002] This type of long component is packed in multiple pieces at a factory or the like, transported to the installation site, and then transferred one by one onto a flatbed truck for transport to another location. This transportation work is performed by workers, and there is a risk of the components being dropped or their hands getting caught during the transfer.

[0003] Furthermore, because flatbed trucks are low and have a simple structure, the tasks of loading items onto the truck and then pushing the truck with the items loaded onto it to another location while avoiding steps and obstacles within the work site are hard work.

[0004] Note that transporting vehicles for transporting long objects are described in Patent Document 1 and Patent Document 2. However, in both transporting vehicles, the work of loading the objects to be transported is performed using a lifting device such as an overhead crane, and they cannot be used at sites where this type of lifting device is not installed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-215693 [Patent Document 2] Japanese Patent Application Publication No. 7-18868 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the present invention has been made in consideration of the above circumstances, and its object is to provide a transport vehicle and a transport method that are versatile, easy to use, and can significantly reduce the workload of workers. [Means for solving the problem]

[0007] The transport vehicle according to the present invention comprises: A transport vehicle for transporting components of an elevator or passenger conveyor, a base unit with wheels having a front surface that is long in the left-right direction; a movable part that is movable in the front-rear direction on the base part within a predetermined range from the front surface to the rear surface of the base part; a lifting unit that can move up and down on the front side of the movable unit; a claw portion attached to the lifting unit, which passes through the upper edge of the front surface of the base unit and moves below the upper edge when the lifting unit descends with the movable unit moving forward; It is a transport cart.

[0008] As one aspect of the transporting platform according to the present invention, The movable part can be retracted with the claw part positioned above the upper edge of the front surface of the base part. The above configuration can be adopted.

[0009] As one aspect of the transporting platform according to the present invention, a fixed part disposed at the rear of the base part so as to face the movable part; The control unit, power supply and electrical system are housed in the fixed part. The above configuration can be adopted.

[0010] As one aspect of the transporting platform according to the present invention, the movable part has a step part on an upper part of a 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 step part. The above configuration can be adopted.

[0011] As one aspect of the transporting platform according to the present invention, The moving part is moved manually, assuming the unlocking operation is performed. The above configuration can be adopted.

[0012] As one aspect of the transporting platform according to the present invention, The claw portion is configured to be extendable in the front-rear direction. The above configuration can be adopted.

[0013] As one aspect of the transporting platform according to the present invention, The base is equipped with a detachable stand to prevent the device from tipping forward. The above configuration can be adopted.

[0014] The conveying method according to the present invention comprises: Using the above-mentioned transport cart, components stacked flat on the floor are lifted and transported by the claws. The transportation method.

[0015] As one aspect of the conveying method according to the present invention, For long components, two transport vehicles are used, and the components are transported while being operated simultaneously while spaced apart. The above configuration can be adopted. [Effects of the Invention]

[0016] According to the present invention, the claws are lowered, inserted under the object, and then raised to lift the object, and the transport vehicle is then driven to transport the object. Therefore, the present invention is versatile and easy to use, and can significantly reduce the workload of workers. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of the platform vehicle as seen obliquely from the front. [Figure 2] FIG. 2 is a perspective view of the platform vehicle as seen obliquely from behind. [Figure 3]FIG. 3 is a side view of the platform vehicle. [Figure 4] Fig. 4(a) is a perspective view of the platform vehicle with the claws in the most forward and least raised positions, and Fig. 4(b) is a side view of the platform vehicle with the claws in the most forward and least raised positions. [Figure 5] Fig. 5(a) is a perspective view of the platform vehicle with the claws in the most retracted and least elevated positions, and Fig. 5(b) is a side view of the platform vehicle with the claws in the most retracted and least elevated positions. [Figure 6] 6(a) is a perspective view of the moving mechanism of the movable part at the most forward position, and FIG. 6(b) is a perspective view of the moving mechanism of the movable part at the most rearward position. [Figure 7] FIG. 7 is a perspective view of the movement mechanism of the lifting unit. [Figure 8] 8(a) and 8(b) are perspective and exploded perspective views of the claw portion. [Figure 9] 9(a) is a partial perspective view of the base unit with the stand attached, and FIG. 9(b) is a partial perspective view of the base unit with the stand removed. [Figure 10] 10(a) to 10(c) are explanatory diagrams of a method for transporting elevator guide rails. [Figure 11] FIG. 11 is an explanatory diagram of the same. DETAILED DESCRIPTION OF THE INVENTION

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

[0019] As shown in Figures 1 to 3, the work platform 1 includes a base unit 2, a movable unit 3, a fixed unit 4, a lifting unit 5, and a claw unit 6. The base unit 2 includes wheels 20 and is capable of traveling on a floor surface. The movable unit 3 is provided so as to be movable in the front-rear direction on the base unit 2 within a predetermined range from the front surface 2a of the base unit 2 to the rear. In this embodiment, the movable unit 3 is moved manually by an operator. The fixed unit 4 is disposed at the rear of the base unit 2 so as to face the movable unit 3. The lifting unit 5 is provided so as to be movable in the up-down direction on the front surface 3a side of the movable unit 3. In this embodiment, the movement of the lifting unit 5 is performed electrically (automatically) by the driving force of a drive source. The claw unit 6 is attached to the lifting unit 5 and is movable in the front-rear direction and up-down direction in accordance with the movement of the movable unit 3 and the lifting unit 5.

[0020] The base unit 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-rear 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 that the base unit 2 has a rectangular parallelepiped shape that is long horizontally in the front-to-rear direction and has an aspect ratio (height dimension / width dimension) of less than 1. The front surface 2a has a rectangular shape that is long horizontally in the left-to-right direction. The side surface 2b has a rectangular shape that is long horizontally in the front-to-rear direction. The top surface 2c is an open surface defined by the upper edges of the front surface 2a and the side surfaces 2b.

[0021] The wheels 20 are attached to the four corners of the lower surface 2d. Each wheel 20 is a swivel wheel that can freely change direction. Each wheel 20 is provided with a stopper that restricts rotation. The two wheels 20 on the rear or front side (front or rear wheels) may be fixed wheels. There may also be a total of three wheels 20, with two in the front and one in the rear, or one in the front and two in the rear.

[0022] The base 2 has handles 21 on the left and right side surfaces 2b, 2b. The handles 21 are long in the front-rear direction. The handles 21 are used when the transport vehicle 1 is to be moved.

[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-rear direction, so that the movable part 3 has a rectangular parallelepiped shape that is vertically long in the vertical direction and has an aspect ratio (length dimension / width dimension) of less than 1. The front surface 3a has a rectangular shape that is vertically long in the vertical direction. The side surfaces 3b have a rectangular shape that is vertically long in the vertical direction. The top surface 3c has a rectangular shape that is horizontally long in the horizontal direction. The rear surface 3d has a rectangular shape that is vertically long in the vertical direction. The upper part of the rear surface 3d is offset toward the front surface 3a, forming a step portion 3e.

[0024] The movable part 3 has handles 31 on the left and right side surfaces 3b, 3b. The handles 31 are long in the vertical direction. The handles 31 are used when moving the transporting vehicle 1, and their vertical position (height position) is set in relation to the center of gravity of the transporting vehicle 1 so that the transporting vehicle 1 does not tip over sideways.

[0025] The movable part 3 has a handle 32 on the top 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, and the lever 33 can be gripped (pulled) with a hand placed 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, allowing the movable part 3 to move. When the hand is released from the lever 33, the stopper locks, fixing the movable part 3 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-rear direction, so that the fixed part 4 has a rectangular shape that is vertically long in the vertical direction and has an aspect ratio (length dimension / width dimension) of less than 1. The front surface 4a has a rectangular shape that is vertically long in the vertical direction. The side surface 4b has a rectangular shape that is vertically long in the vertical direction. The top surface 4c has a rectangular shape that is horizontally long in the horizontal direction. The rear surface 4d has a rectangular shape that is vertically long in the vertical direction. The fixed part 4 has a height difference Δh, making its height dimension in the vertical direction smaller than that of the movable part 3.

[0027] The fixed part 4 has handles 41 on the left and right side surfaces 4b, 4b. The handles 41 are long in the vertical direction. The handles 41 are used when moving the transporting vehicle 1, and their vertical position (height position) is set in relation to the center of gravity of the transporting vehicle 1 so that the transporting vehicle 1 does not tip over sideways.

[0028] The fixed part 4 has a handle 42 on the top surface 4c. The handle 42 is long in the left-right direction. The handle 42 is used when moving the transport cart 1. An operation button 43 is provided near the handle 42. The operation button 43 has an up button, a down button, and a stop button. The up button is a button for raising the lifting part 5. The down button is a button for lowering the lifting part 5. The stop button is a button for stopping the lifting and lowering of the lifting part 5. However, if the lifting and lowering operating circuit of the lifting part 5 is designed to operate only while the up button and down button are pressed, the stop button is not necessary.

[0029] The rear surface 4d has a cover that can be opened and closed, and when opened, it is possible to access the inside of the fixed part 4. The fixed part 4 houses a control unit, a power supply (battery), and an electrical system. For this reason, the fixed part 4 is a relatively heavy object, and also functions as a weight when the transport vehicle 1 is lifted.

[0030] The lifting unit 5 includes a base plate 50 and an extension arm 51. The base plate 50 has a rectangular shape that is long in the left-right direction, and is disposed on the front surface 3a of the movable unit 3, and is disposed vertically along the front surface 3a. The extension arm 51 is attached to the front surface of the base plate 50, and is provided so as to protrude downward from the base plate 50.

[0031] The lifting unit 5 has indicators 52 on the left and right side portions of the base plate 50. Correspondingly, the movable unit 3 has marks 35 on the left and right side surfaces 3b, 3b. The marks 35 and indicators 52 indicate the height position of the lifting unit 5 at which the claws 6 are positioned above the upper edge and upper surface 2c of the front surface 2a of the base unit 2, thereby allowing the movable unit 3 to move back without interfering with the front surface 2a of the base unit 2 (hereinafter, this position will be referred to as the minimum raised position).

[0032] The claw portion 6 is attached to the lower part of the lifting unit 5. That is, the claw portion 6 is attached to the lower part of the extension arm 51 of the lifting unit 5. The claw portion 6 is attached to the lifting unit 5 so that, at the 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 extendable 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.

[0033] There is one claw portion 6, and it is located at the center in the left-right direction. That is, the width dimensions in the left-right direction of the movable portion 3, the fixed portion 4, and the lifting portion 5 are similar, and the width dimension in the left-right direction of the transporting carriage 1 is determined by the width dimensions in the left-right direction of these movable portion 3, the fixed portion 4, and the lifting portion 5, so the claw portion 6 is located at the center in the left-right direction of the transporting carriage 1. More specifically, the claw portion 6 is located so that the center in the left-right direction of the claw portion 6 coincides with the center in the left-right direction of the transporting carriage 1. However, the claw portion 6 may also be located at a position shifted to either the left or right from the center in the left-right direction of the transporting carriage 1.

[0034] From the above configuration, the transporting vehicle 1 can be broadly divided into three states: i) a state in which the movable section 3 (lifting section 5 and claw section 6) is in the most forward position and the lifting section 5 (and claw section 6) is in the most lowered position (see Figures 1 to 3); ii) a state in which the movable section 3 (lifting section 5 and claw section 6) is in the most forward position and the lifting section 5 (and claw section 6) is in the least raised position (see Figure 4); and iii) a state in which the movable section 3 (lifting section 5 and claw section 6) is in the most rearward position and the lifting section 5 (and claw section 6) is in the least raised position (see Figure 5). Of course, it goes without saying that the movable section 3 can be moved and stopped at any position between the most forward position and the most rearward position, and that the lifting section 5 can be moved and stopped at any position between the most lowered position and the most raised position. The most forward position, the most backward position, the most lowered position, and the most raised position refer to positions to which the device cannot be moved physically (mechanically or electrically).

[0035] FIG. 6 shows an example of a movement mechanism for the movable unit 3. The movement mechanism for the movable unit 3 includes guide bodies 22 and 23 as components on the base unit 2 side, and slide bodies 36 and 37 as components on the movable unit 3 side. The guide bodies 22 are a pair of guide rods arranged in the base unit 2 with a center line along the front-rear direction and spaced apart in the left-right direction. The slide bodies 36 are carriages that slidably engage with the guide bodies 22, and the guide bodies 22 and 36 are in the form of linear guides. The guide bodies 23 are guide rails arranged in the base unit 2 with a center line along the front-rear direction and between the pair of guide bodies 22, 22. The slide bodies 37 are carriages that slidably engage with the guide bodies 23, and the guide bodies 23 and 37 are in the form of linear guides. The slide bodies 36 and 37 are attached to the underside of the base plate 30 of the movable unit 3, allowing the movable unit 3 to move linearly in the front-rear direction.

[0036] 7 shows an example of the movement mechanism of the lifting unit 5. The movement mechanism of the lifting unit 5 includes a drive mechanism 38 as a component on the movable unit 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 disposed within the movable unit 3 so that its centerline is aligned vertically and its cylinder rod extends upward. The rod 381 is disposed within the movable unit 3 so that its centerline is aligned 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. Sprockets 382 are attached coaxially and rotatably to the left and right of the rod 381, sandwiching the cylinder rod therebetween. One end of the chain 383 is fixed to the back surface of the base plate 50 of the lifting unit 5 directly or indirectly via a bracket, and is wound around the sprocket 382. The other end is fixed within the movable unit 3. Guide rollers 384 are attached to both ends of the rod 381 and are guided vertically by guide units within the movable unit 3. A control unit within the fixed unit 4 controls the amount of extension and retraction of the cylinder rod of the cylinder 380, allowing the lifting unit 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 a pin that is movable in the axial direction. The stopper is located at the bottom inside the movable part 3, and advances due to the elastic force of an elastic body. When the stopper is inserted into a hole (not shown) formed in the base part 2, it is locked. When the lever 33 is gripped, the tip of the stopper, which is pulled via the wire 34, comes out of the hole and the lock is released.

[0039] 8, the claw portion 6 is extendable and its length in the front-rear direction can be changed. The claw portion 6 includes a fixed body 60 and an extendable body 61.

[0040] The fixed body 60 is made by bending the center of a single metal plate, and has one piece formed into a comb shape and the other piece as the bent piece 60a. One piece is arranged horizontally and is the part on which the object to be transported is placed. The bent piece 60a is arranged vertically and is the part attached to the lifting unit 5 (extension arm 51).

[0041] The extendable body 61 is made by bending the end of a single metal plate, and comprises one piece formed into a comb shape and the other piece as a bent piece 61a. One piece is arranged horizontally and fits into the comb portion of one piece of the fixed body 60 to form a single plane, and is the part on which the object to be transported is placed. The bent piece 61a is arranged vertically and is the part facing the bent piece 60a of the fixed body 60. The pair of bent pieces 60a, 61a prevents the object to be transported from falling off the claw portion 6.

[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 of the elastic body, and when inserted into a slit hole 61b formed in the expandable body 61, it is locked, fixing the expandable body 61 and preventing it from moving. When the stopper 60b is pulled, the tip of the stopper 60b comes out of the slit hole 61b, releasing the lock and allowing the expandable body 61 to move.

[0043] The distance between the pair of bent pieces 60a, 61a when they are most open is set to be equal to or greater than the width of the object to be conveyed (maximum size 140 mm for elevator guide rails) + 20 mm and equal to or less than the width of the object to be conveyed + 150 mm. This allows the claw portion 6 to have a placement surface that is neither too short nor too long compared to the width of the object to be conveyed.

[0044] As shown in FIG. 9, the base 2 includes a stand 24. The stand 24 is located forward of the front wheels 20 and partially contacts the floor surface, thereby preventing the transport vehicle 1 from losing balance and tipping forward due to the weight of the transported object during lifting. The stand 24 includes a pair of pins 24a, 24a that are inserted into a pair of holes 2e, 2e formed in the side surface 2b of the base 2, and is detachably attached to the base 2. Alternatively, the stand 24 can be attached to the base 2 in a state rotated 180 degrees so that the contact portion (the arm in the illustrated example) is above and away from the floor, thereby preventing interference with the travel of the transport vehicle 1. The pins may be provided on the side surface 2b of the base 2, and the holes may be formed in the stand.

[0045] The transporting vehicle 1 according to this embodiment has the above-described configuration, and next, a method of use (transporting method) will be described. As shown in Fig. 10, an example of the object to be transported is an elevator guide rail R, which is placed on a pair of cross beams W, W placed parallel to each other with a gap between them on the floor surface, thereby floating above the floor surface and stacked flat.

[0046] The conveying method according to this embodiment is specialized in picking up and conveying the guide rails R stacked flat one by one. a) Step of turning on the power of the transport vehicle 1 b) A process of moving the transport vehicle 1 to the side of the guide rail R c) A step of gripping the handle 33 and moving the movable part 3 forward (to the most forward position) (see FIG. 4). d) A step of pressing the lowering button 43 to lower the lifting unit 5 (to the lowest position) (see FIGS. 1 and 10(a)). e) A process of moving the transporting vehicle 1 or the movable part 3 so that the claw part 6 is positioned below the guide rail R (see FIG. 10(b)). f) A process of pressing the lift button 43 to lift the lifting unit 5 (to the minimum lifted position) and lifting the guide rail R (see FIG. 10(c) and FIG. 4). g) A step of gripping the handle 33 and retracting the movable part 3 (to the most retracted position) (see FIG. 5). h) A process of transporting the guide rail R to another location (see Figure 11) i) A step of gripping the handle 33 and moving the movable part 3 forward (to the most forward position) (see FIG. 10(c) and FIG. 4). j) A process of pressing the lowering button 43 to lower the lifting unit 5 (to the lowest position) and lowering the guide rail R onto a crossbeam or a platform cart (see Figures 1, 10(c), and 10(b)). k) A process of moving the transporting carriage 1 or the movable part 3 so as to remove the claw part 6 from under the guide rail R (see FIG. 10(a)). l) A step of pressing the lift button 43 to lift the lifting unit 5 (to the minimum lift position) (see FIG. 4). m) A step of gripping the handle 33 and retracting the movable part 3 (to the most retracted position) (see FIG. 5). Equipped with.

[0047] As described above, according to the transporting vehicle 1 of this embodiment, the claws 6 are lowered, inserted under the guide rail R, and then the guide rail R is lifted by raising the claws 6, and the transporting vehicle 1 is then run, thereby transporting the guide rail R. Therefore, the transporting vehicle 1 of this embodiment is versatile and easy to use, and can significantly reduce the workload of the worker.

[0048] According to the transporting vehicle 1 of this embodiment, by raising the claw portion 6 and then retracting it, the guide rail R can be brought closer to the center of gravity of the transporting vehicle 1. Therefore, according to the transporting vehicle 1 of this embodiment, the transporting vehicle 1 will not lose balance and tip over, and the guide rail R can be transported stably.

[0049] According to the transporting vehicle 1 of this embodiment, since the base 2 has a front surface 2a, the claws 6 cannot be retracted unless they are raised above the upper edge of the front surface 2a. In other words, if the claws 6 remain in a low position, they interfere with the front surface 2a and cannot be retracted. This prevents the guide rail R from colliding with the base 2 and falling off the claws 6 when the claws 6 are retracted while remaining in a low position. In this respect, the transporting vehicle 1 of this embodiment can transport the guide rail R stably.

[0050] In the transporting vehicle 1 according to this embodiment, the fixed part 4 is disposed at the rear of the base part 2 so as to face the movable part 3. The fixed part 4 houses a control part, a power supply, and an electrical system, and is a relatively heavy object. As a result, the fixed part 4 also functions as a weight when the transporting vehicle 1 is lifted. Therefore, the transporting vehicle 1 according to this embodiment prevents the transporting vehicle 1 from tipping forward due to the weight of the guide rail R when lifted. This effect can also be obtained by using the stand 24.

[0051] According to the transporting platform 1 of this embodiment, the movable part 3 has a step part 3e on the upper part of the rear surface 3d, and therefore, when the movable part 3 is retracted, a separation space is formed by the step part 3e between the movable part 3 and the fixed part 4. Therefore, according to the transporting platform 1 of this embodiment, it is possible to prevent an arm or a finger from being pinched when the movable part 3 is retracted. This effect can also be obtained by the movable part 3 being higher than the fixed part 4 by a height difference Δh.

[0052] According to the transporting vehicle 1 of this embodiment, the claws 6 are configured to be extendable in the front-rear direction. Therefore, the transporting vehicle 1 of this embodiment can accommodate different sizes of objects to be transported.

[0053] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0054] In the above embodiment, two transport vehicles are used as a pair because the transport object is long. However, the present invention is not limited to this. If the transport object is not long and can be lifted and transported by a single transport vehicle, only one transport vehicle may be used.

[0055] When two transport vehicles are used as a pair, the control unit of each transport vehicle can be equipped with a communication unit consisting of a transmitter and a receiver. In this case, when the operation button 43 of one transport vehicle is pressed, the control unit of one transport vehicle issues a movement command signal (raise command signal or lower command signal) to its own drive mechanism 38 and wirelessly transmits a movement command signal (raise command signal or lower command signal) to the receiver of the other transport vehicle via the transmitter. In response to this, the control unit of the other transport vehicle issues a movement command signal (raise command signal or lower command signal) to its own drive mechanism 38. In this way, the claws 6 of the two transport vehicles can be raised and lowered in synchronization by simply operating the operation button (operation unit) 43 of one transport vehicle.

[0056] 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 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 part uses a sensor or the like to determine the minimum raised position of the lifting part 5, and employs a sequence in which an interlock that restricts the retraction of the movable part 3 is activated when the lifting part 5 is positioned below the minimum raised position. Furthermore, even if the movement is manual, this interlock circuit can be replaced by a combination of the mark 35 and the indicator 52.

[0057] In the present invention, terms that specify a shape, part, state, or direction, such as "rectangular parallelepiped shape," "rectangular shape," "straight," "center," "central," "end," "coinciding," "same," "horizontal," "vertical," "orthogonal," "up and down," "front and back," and "left and right," include not only the thing itself, but also the concept of "approximately" which means something close to or similar to it. [Explanation of symbols]

[0058] 1...transport vehicle, 2...base part, 2a...front surface, 2b...side surface, 2c...top surface, 2d...bottom surface, 2e...hole, 20...wheel, 21...handle, 22...guide body, 23...guide body, 24...stand, 24a...pin, 3...movable part, 3a...front surface, 3b...side surface, 3c...top surface, 3d...rear surface, 3e...step portion, 30...base plate, 31...handle, 32...handle, 33...lever (operating body), 34...wire, 35...mark, 36...sliding body, 37...sliding body, 38...driving mechanism, 380...shield 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... extension 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... link wood

Claims

1. A transport vehicle for transporting components of an elevator or passenger conveyor, a base unit with wheels having a front surface that is long in the left-right direction; a movable part that is movable in the front-rear direction on the base part within a predetermined range from the front surface to the rear surface of the base part; a lifting unit that can move up and down on the front side of the movable unit; a claw portion attached to the lifting unit, which passes through the upper edge of the front surface of the base unit and moves below the upper edge when the lifting unit descends with the movable unit moving forward; Transport cart.

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

3. a fixed part disposed at the rear of the base part so as to face the movable part; The control unit, power supply and electrical system are housed in the fixed part. The transport vehicle according to claim 1 .

4. the movable part has a step part on an upper part of a 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 step part. The transport vehicle according to claim 3.

5. The moving part is moved manually, assuming the unlocking operation is performed. The transport vehicle according to claim 1 .

6. The claw portion is configured to be extendable in the front-rear direction. The transport vehicle according to claim 1 .

7. The base is equipped with a detachable stand to prevent the device from tipping forward. The transport vehicle according to claim 1 .

8. The transport vehicle according to any one of claims 1 to 7 is used to lift and transport components stacked flat on a floor surface with the claws. Transportation method.

9. For long components, two transport vehicles are used, and the components are transported while being operated simultaneously while spaced apart. The transport method according to claim 8.

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