JP6407585B2 - elevator - Google Patents

Description

  The present invention relates to a construction elevator used at a construction site, for example.

  For example, construction elevators are used at building construction sites. As a construction elevator, a rack and pinion drive construction elevator has been proposed. This type of construction elevator has one or two posts, a transporter formed so as to be movable up and down along the post, and a prime mover for lifting and lowering the transporter.

  The post is provided with a rack along the post. The output shaft of the prime mover is connected to a pinion that meshes with the rack via a reduction gear. The prime mover and the speed reducer are disposed below the bottom wall portion of the transporter. As the output shaft of the prime mover rotates, the pinion rotates with respect to the rack, so that the transporter moves up and down.

  Moreover, the opening for a worker's getting on / off is provided in the front of the carrier. The carrier is provided with a door that can open and close this opening. The door opens and closes the opening by sliding with respect to the opening. In the state where the opening is opened, the door protrudes with respect to the carrier.

  In the state where the opening is opened, the door is divided into two parts in the vertical direction in order to reduce the protrusion amount of the door with respect to the carrier. The upper door located above opens the opening by moving upward from a state in which the opening is closed. The lower door located below opens the opening by moving downward from a state where the opening is closed.

  By dividing the door into two parts, the amount of protrusion of the door with respect to the carrier can be reduced. Furthermore, by dividing the door into a plurality of parts, the driving force required to open and close one door can be reduced.

(For example, refer to Patent Document 1).

Utility model registration No. 2536878

  The elevator described above has the following problems. That is, since the prime mover and the speed reducer are disposed below the transporter, the position of the transporter when the transporter reaches the ground floor needs to be higher than the ground by the space where the prime mover and the speed reducer are disposed. .

  Furthermore, if the door is divided into two parts, and the lower door moves downward from a state where the opening is closed, the position of the carrier when the carrier is landed on the ground floor is opened. It is necessary to increase the amount of protrusion of the lower door relative to the carrier so that the lower door does not come into contact with the ground.

  Thus, since it is necessary to raise the position of the transporter that has landed on the ground floor with respect to the ground, a stage is required when loading a load into the transporter through the opening. Since a stage is required, it takes time to get on and off the carrier. In addition, getting on and off is a concept including loading and unloading of luggage and getting on and off of people.

  An object of this invention is to provide the elevator which can perform boarding / alighting easily.

The elevator of the present invention includes a transporter, opening / closing means, guide rails, an electric motor for driving, and conversion means. The transporter includes a transporter body in which an opening is formed, and a door portion that can open and close the opening. The opening / closing means moves the door portion between a closed position and an open position positioned above the closed position. The guide rail guides the movement of the transporter. The electric motor for driving is fixed and positioned in a portion above the upper surface of the bottom wall portion of the portable body in the portable device. The conversion means converts the rotation of the output shaft of the drive electric motor into movement of the transporter along the guide rail.
The door portion includes a lower door and an upper door. The lower door is a lower door that covers a lower portion of the opening, and is movable between a lower door closed position and an upper lower door open position with respect to the lower door closed position. The upper door is an upper door that covers an upper portion with respect to the lower portion of the opening, and is between an upper door closed position and an upper door open position above the upper door closed position. It is possible to move with.
The state in which the door portion is in the closed position is a state in which the lower door is in the lower door closed position and the upper door is in the upper door closed position. The state in which the door portion is in the open position is a state in which the lower door is in the lower door open position and the upper door is in the upper door open position.
The opening / closing means includes a moving means and a door opening / closing mechanism engaging portion. The moving means moves the lower door between the lower door closed position and the lower door open position. The door opening / closing mechanism engaging portion is provided on the lower door, and engages with the upper door in the upper door closed position, and moves with the lower door moving toward the lower door open position. Push up the upper door.

  According to the present invention, it is possible to easily get on and off the carrier.

The front view which shows the elevator which concerns on the 1st Embodiment of this invention. It is a front view which shows the flame | frame of the elevator, (a) shows a left side part, (b) is a front view which shows a right side part. It is a front view which shows the state by which the frame was decomposed | disassembled, (a) shows a left side part, (b) is a front view which shows a right side part. The front view which shows the carrier of the elevator. Sectional drawing of the carrier shown along the F5-F5 line section shown in FIG. Sectional drawing of the carrier shown along the F6-F6 line cross section shown in FIG. Schematic which shows the door opening / closing mechanism of the same carrier. The front view which shows the carrying device of the state which the upper door was in the closed position for upper doors, and the lower door rose to the position which overlaps with the upper door in the front-back direction. Sectional drawing of the carrying device shown along the F9-F9 line cross section shown in FIG. The front view which shows the carrying device of the state which the lower door is raising to the open position for lower doors with respect to the state shown in FIG. Sectional drawing of the carrying device shown along the F11-F11 line | wire cross section shown in FIG. The front view which shows the carrier which shows the state by which the opening of the carrier was fully opened. Sectional drawing of the carrier shown along the F13-F13 line cross section shown in FIG. The plane sectional view of the elevator shown roughly along the F14-F14 line section shown in FIG. The plane sectional view of the elevator shown roughly along the F15-F15 line section shown in FIG. The schematic which shows the door opening / closing mechanism of the elevator which concerns on the 2nd Embodiment of this invention similarly to FIG. Schematic which shows the modification of the elevator which concerns on the 1st Embodiment of this invention similarly to FIG.

  The elevator which concerns on the 1st Embodiment of this invention is demonstrated using FIGS. FIG. 1 is a front view showing an elevator 10. The elevator 10 is provided in a building under construction as an example. As shown in FIG. 1, the elevator 10 includes a pair of posts 20, a rack 30 provided on the posts 20, a frame 40 provided so as to be movable up and down along the posts 20, and a drive unit provided so as to drive the frame 40. 55 and a transporter 60 fixed to the frame 40.

  In the present embodiment, a pair of posts 20 is provided as an example. One post 20 and the other post 20 are spaced apart from each other. The post 20 has a function of guiding the travel of the transporter 60 described later, and extends so as to connect between destinations to which the transporter 60 should be transported. In the present embodiment, the elevator 10 is configured so that the transporter 60 can be transported from the ground to each floor of the building. Therefore, the post 20 is vertically moved so as to connect the ground and the top floor of the building. It extends parallel to the direction V. Note that the vertical direction V is defined with the direction in which gravity acts as the downward direction and the opposite direction as the upward direction.

  As an example, in this embodiment, the post 20 includes four columnar members 21 and a column portion 22 formed so as to be able to support each columnar member 21. FIG. 14 is a plan sectional view of the elevator 10 schematically shown along the section F14-F14 in FIG. As shown in FIGS. 1 and 14, the pillar portion 22 is constituted by a plurality of rectangular frames and a plurality of beams connecting the plurality of rectangular frames as an example. The column portion 22 of one post 20 and the column portion 22 of the other post 20 are fixed to the ground 1 and extend in the vertical direction V. Racks 30 are respectively provided at portions of the two column portions 22 that face each other. The rack 30 extends in the vertical direction V.

  A direction from one column 22 to the other column 22 and a direction from the other column 22 to one column 22 are defined as a width direction W. The width direction W is perpendicular to the up-down direction V. A direction perpendicular to the vertical direction V and the width direction W is defined as a front-rear direction F, a direction toward the front in FIG. 1 is defined as a front direction, and a direction toward the back in FIG.

  As shown in FIG. 14, the columnar members 21 are fixed to the four corners of the column portion 22 one by one and extend in the vertical direction V. The column portion 22 supports the column member 21. Here, the posture of each post 20 will be described. Each post 20 is arranged in a posture in which one side of the column portion 22 is parallel to the front-rear direction F. For this reason, the two columnar members 21 fixed to the inner side in the width direction of the column part 22 are arranged in the front-rear direction F, and the two columnar members 21 fixed to the outer side in the width direction of the column part 22 are also arranged in the front-rear direction F. .

  2A and 2B are front views showing the frame 40, in which FIG. 2A shows the left side portion and FIG. 2B shows the right side portion. FIG. 3 is a front view showing a state in which the frame 40 is disassembled. In FIG. 3, (a) shows the left side portion and (b) shows the right side portion. As shown in FIGS. 2 and 3, the frame 40 includes a drive frame 41 to which a drive unit electric motor 57 of the drive unit 55 described later is fixed, and a governor frame 42 connected to the lower end of the drive frame 41. Have. FIG. 3 shows a state where the governor frame 42 is removed from the drive frame 41.

  As shown in FIG. 1, the drive frame 41 includes a first drive frame 43 slidably connected to one post 20 and a second drive slidably connected to the other post 20. Frame 44.

  Since the first drive frame 43 and the second drive frame 44 have the same structure symmetrically, the first drive frame 43 will be described as a representative. The components of the second drive frame 44 are denoted by the same reference numerals as those of the components of the first drive frame 43, and description thereof is omitted.

  The first drive frame 43 includes a drive frame main body 45 to which the drive unit electric motor 57 is fixed, four first connection parts 46a formed so that the drive frame main body 45 can be connected to the post 20, and a drive frame. The main body 45 has four second connecting portions 46 b formed so as to be connectable to the post 20.

  As an example, the drive frame main body 45 is formed of C-shaped steel without a lip, and extends along the post 20. One first connecting portion 46 a is provided at each of the front and rear end portions of the upper end portion of the drive frame main body 45 and at each of the front and rear end portions of the lower end portion of the drive frame main body 45. 1, 2 and 3 are front views, only the first connecting portion 46a provided at the front end portion is shown.

  FIG. 14 shows two first connecting portions 46 a provided at the upper end portion of the drive frame main body 45. In FIG. 14, the range F14 is enlarged. A range F <b> 14 shows a state where the first connecting portion 46 a is connected to the columnar member 21.

  As shown in FIG. 14, each first connecting portion 46 a is formed to be slidable with respect to the columnar member 21 of the post 20. Specifically, the first connecting portion 46a includes a first base portion 200 and a pair of pivotable members that are rotatably supported by the first base portion 200 and sandwich the columnar member 21 in the width direction W. The first roller 201 is included. The first base 200 is fixed to the drive frame main body 45. The first roller 201 has a concave shape on the inside. When the cylindrical member 21 is accommodated in the recess of the first roller 201, the two first rollers 201 sandwich the cylindrical member 21. When the two first rollers 201 sandwich the cylindrical member 21, the first connecting portion 46 a is engaged with the cylindrical member 21. When the transporter 60 moves up and down, each of the first rollers 201 rotates with respect to the cylindrical member 21, so that the transporter 60 can move up and down smoothly.

  The first connecting portion 46 a provided at the front end portion of the upper end portion and the lower end portion of the drive frame main body 45 is a columnar member 21 disposed in front of the two columnar members 21 fixed to the inner side of the column portion 22. In addition, they are connected via a first roller 201. In addition, the first connecting portion 46 a provided at the rear end portion of the upper end portion and the lower end portion of the drive frame main body 45 is disposed on the rear side of the two columnar members 21 that are fixed inside the width of the column portion 22. The cylindrical member 21 is connected via a first roller 201.

  In the drive frame main body 45, the 2nd connection part 46b is provided one each in the front-and-rear end part of the part above the 1st connection part 46a provided in an upper end part. Moreover, the 2nd connection part 46b is provided in the front-and-rear end part of the part below the 1st connection part 46a provided in a lower end part in the drive frame main body 45 one each.

  FIG. 15 is a plan sectional view of the elevator 10 schematically shown along the section line F15-F15 shown in FIG. FIG. 15 shows a second connecting portion 46 b provided at the upper end portion of the drive frame main body 45. In FIG. 15, the range F15 is shown enlarged. The range F15 shows a state in which the two columnar members 21 fixed to the inner side in the width direction of the column portion 22 are sandwiched in the front-rear direction by the two second connecting portions 46b.

  As shown in FIG. 15, the second connecting portion 46 b includes a second roller 202 and a second base 203 that rotatably supports the second roller 202. The second base 203 is fixed to the drive frame main body 45.

  The second roller 202 of the second connecting portion 46b disposed in the front is connected to the columnar member 21 disposed in the front out of the two columnar members 21 fixed on the inner side in the width direction of the column portion 22 from the front. It is engaged toward the rear. Note that the second roller 202 has a concave shape on the inside. By accommodating the cylindrical member 21 in the recess of the second roller 202, the second roller 202 is engaged with the cylindrical member 21.

  The second roller 202 of the second connecting portion 46b positioned rearward is connected to the columnar member 21 disposed rearward among the two columnar members 21 fixed to the inner side in the width direction of the column portion 22. It is engaged from the rear to the front.

  Thus, the two cylindrical members 21 are sandwiched in the front-rear direction F by the two second connecting portions 46 b arranged in the front-rear direction F. The two columnar members 21 are also sandwiched in the front-rear direction F in the same manner as in FIG. 15 by the two second connecting portions 46 b provided at the lower end of the drive frame main body 45. When the transporter 60 moves up and down, each of the second rollers 202 rotates with respect to the cylindrical member 21, so that the transporter 60 can be lifted and lowered smoothly.

  The governor frame 42 includes a first governor frame 47 coupled to the first drive frame 43 and a second governor frame 48 coupled to the second drive frame 44. Note that the first governor frame 47 and the second governor frame 48 have the same structure symmetrically, so the first governor frame 47 will be described as a representative. Since the components of the second governor frame 48 are the same as the components of the first governor frame 47, the components of the second governor frame 48 have the same reference numerals as the components of the first governor frame 47. Attached.

  The first governor frame 47 includes a governor frame main body 49, four first connecting portions 46 a formed so that the governor frame main body 49 can be connected to the post 20, and the governor frame main body 49 to the post 20. And four second connecting portions 46b formed to be connectable. As an example, the governor frame body 49 is formed of C-shaped steel without a lip and extends along the post 20. Since the first connecting portion 46a and the second connecting portion 46b are the same as the first connecting portion 46a and the second connecting portion 46b provided in the drive frame 41, the same reference numerals are used for description. Omitted.

  One first connecting portion 46 a is provided at each of the front and rear end portions of the upper end portion of the governor frame main body 49 and at each of the front and rear end portions of the lower end portion of the governor frame main body 49. In the first connecting portion 46 a fixed to the governor frame main body 49, the first base portion 200 is fixed to the governor frame main body 49.

  The first connecting portion 46 a provided at the front end portion of the governor frame main body 49 is a first connecting member between the two columnar members 21 fixed to the inner side in the width direction of the columnar portion 22. They are connected via a roller 201. When the transporter 60 moves up and down, the first roller 201 rotates with respect to the cylindrical member 21, so that the transporter 60 can be lifted and lowered smoothly.

  The two first connecting portions 46 a provided at the rear end portion of the governor frame main body 49 are connected to the columnar member 21 arranged at the rear of the two columnar members 21 fixed to the inner side in the width direction of the column portion 22. The first roller 201 is connected. The two first rollers 201 of each first connecting portion 46a sandwich the cylindrical member 21 in the width direction.

  One second connecting portion 46b is provided at each of the front and rear end portions of the upper portion of the governor frame main body 49 above the first connecting portion 46a. Further, one second connecting portion 46 b is provided at each of the front and rear end portions of the lower portion of the governor frame body 49 below the first connecting portion 46 a. In the second connecting portion 46 b fixed to the governor frame main body 49, the second base portion 203 is fixed to the governor frame main body 49.

  The second roller 202 of the second connecting portion 46b disposed in the front is connected to the columnar member 21 disposed in the front out of the two columnar members 21 fixed on the inner side in the width direction of the column portion 22 from the front. It is engaged toward the rear. The second roller 202 of the second connecting portion 46b positioned rearward is connected to the columnar member 21 disposed rearward among the two columnar members 21 fixed to the inner side in the width direction of the column portion 22. It is engaged from the rear to the front.

  Thus, the two cylindrical members 21 are sandwiched in the front-rear direction F by the two second connecting portions 46b arranged in the front-rear direction.

  The first drive frame 43 and the first governor frame 47 are connected to each other by a pair of link members 50 in the front-rear direction F. The second drive frame 44 and the second governor frame 48 are connected to each other by a pair of link members 50.

  The connection structure for connecting the first drive frame 43 and the first governor frame 47 to each other and the connection structure for connecting the second drive frame 44 and the second governor frame 48 to each other are the same. For this reason, a connection structure for connecting the first drive frame 43 and the first governor frame 47 to each other will be described as a representative.

  The first governor frame 47 is connected to the first drive frame 43 by a pair of link members 50. The link member 50 has a linear shape. A first through hole 51 that penetrates the link member 50 is formed at one end of the link member 50. A second through hole 52 that penetrates the link member 50 is formed at the other end of the link member 50.

  A third through hole 45 a that penetrates the drive frame main body 45 in the front-rear direction F is formed at the lower end of the drive frame main body 45. A fourth through hole 49 a that penetrates the governor frame main body 49 in the front-rear direction F is formed at the upper end portion of the governor frame main body 49 of the first governor frame 47.

  In the present embodiment, the post 20 includes, for example, one column portion 22 and four columnar members 21. The four cylindrical members are arranged one by one at the four corners of the column portion 22 having a rectangular plane cross section perpendicular to the vertical direction V.

  For this reason, the operation of adjusting the posture of the post 20 to make the posture in which the two columnar members 21 to which the first connecting portion 46a and the second connecting portion 46b are connected to each other in the width direction is simplified. be able to.

  As another example, the post 20 may include, for example, the column portion 22 and only the two columnar members 21 to which the first coupling portion 46a and the second coupling portion 46b are coupled as columnar members. Good.

  The pair of link members 50 are configured so that the first through hole 51 at one end communicates with the third through hole 45a at the lower end of the drive frame main body 45 and the drive frame main body 45 extends in the front-rear direction F therebetween. The lower end is sandwiched. Then, the first shaft member 53 is inserted into the first through hole 51 at one end of the pair of link members 50 and the third through hole 45 a at the lower end of the drive frame main body 45.

  The first shaft member 53 is formed so that the drive frame main body 45 can rotate around the first shaft member 53 with respect to the link member 50. As an example, in the present embodiment, the first shaft member 53 is formed to be slightly smaller than the through holes 51 and 45 a, so that the drive frame main body 45 can rotate with respect to the link member 50. . A structure is provided between the first shaft member 53 and the through holes 51 and 45a to prevent the first shaft member 53 from coming out of the through holes 51 and 45a.

  In addition, the pair of link members 50 are configured so that the second through hole 52 at the other end communicates with the fourth through hole 49a at the upper end of the governor frame main body 49, and the governor frame in the front-rear direction F therebetween. The upper end of the main body 49 is sandwiched. Then, the second shaft member 54 is inserted into the second through hole 52 at the other end of the pair of link members 50 and the fourth through hole 49 a at the upper end of the governor frame body 49.

  The second shaft member 54 is formed so that the governor frame main body 49 can rotate around the second shaft member 54 with respect to the link member 50. As an example, in the present embodiment, the second shaft member 54 is formed to be slightly smaller than the through holes 52 and 49 a, and thus the governor frame body 49 is rotatable with respect to the link member 50. is there. A structure is provided between the second shaft member 54 and the through holes 52 and 49a to prevent the second shaft member 54 from coming out of the through holes 52 and 49a.

  One drive unit 55 is provided for each of the first drive frame 43 and the second drive frame 44. The drive unit 55 provided in the first drive frame 43 will be described as a representative.

  The drive unit 55 is a pinion that decelerates the rotation of the pinion 56 that can be meshed with the rack 30, the drive unit electric motor 57 that is an example of a drive source, and the output shaft of the drive unit electric motor 57. And a speed reducer 58 configured to be able to transmit to 56. A schematic view of the connection of the rack 30, the pinion 56, the speed reducer 58, and the drive unit electric motor 57 is shown in a range F1 in FIG. The drive portion electric motor 57 and the speed reducer 58 are integrally formed and are fixed to the upper end portion of the drive frame main body 45.

  The first drive frame 43 and the second drive frame 44 are provided with a connecting pipe 59 that synchronizes the elevation of the first drive frame 43 and the elevation of the second drive frame 44. The connecting pipe 59 is provided across the first drive frame 43 and the second drive frame 44.

  FIG. 4 is a front view showing the transporter 60. FIG. 5 is a cross-sectional view of the carrying device 60 shown along the cross section taken along line F5-F5 shown in FIG. As shown in FIGS. 4 and 5, the transporter 60 defines a storage space in which a worker and luggage can be stored and opens and closes the transporter main body 61 in which an opening 62 for getting on and off is formed on the front surface. A door 70 configured to be capable of opening and closing, a door guide mechanism 80 (shown in FIG. 6) formed to be capable of guiding opening and closing of the door 70 with respect to the opening 62, a door opening and closing mechanism 90 configured to be able to open and close the door 70, A tread plate 100 provided at the lower end of the transporter main body 61 and a tread plate opening / closing mechanism 110 configured to be able to open and close the tread plate 100 are provided. In addition, getting on and off is a concept including loading and unloading of luggage and getting on and off of people.

  The transporter main body 61 has a bottom wall part 63, a pair of side wall parts 64 and 65, a rear wall part 66, and a ceiling wall part 67. The rear wall portion extends upward from the rear end of the bottom wall portion 63. One side wall portion 64 extends upward from one end in the width direction of the bottom wall portion 63. The other side wall portion 65 extends upward from the other end in the width direction of the bottom wall portion 63. The ceiling wall portion 67 is connected to the upper end of the rear wall portion 66 and the upper ends of the side wall portions 64 and 65 and faces the bottom wall portion 63. The opening 62 is defined by the front end edge of the bottom wall portion 63, the front end edges of the side wall portions 64 and 65, and the front end edge of the ceiling wall portion 67.

  The transporter body 61 is fixed to the governor frame 42. For this reason, the drive part 55 and the connection pipe 59 are located above the transporter body 61. The transporter main body 61 is fixed to the governor frame main body 49 so that the lower end 63 b of the transporter 60 is positioned below the lower end 49 b of the governor frame main body 49. The lower end 63b is in the vicinity of the lower surface of the bottom wall portion 63 in the present embodiment.

  Note that the position of the lower end 63 b varies depending on the structure of the transporter 60. For example, there is a structure in which the lower surface of the bottom wall portion 63 is the lower end 63b of the transporter body 61. Alternatively, in the case of a structure in which the lower ends of the side wall portions 64 and 65 protrude downward from the bottom wall portion 63, the lower ends of the side wall portions 64 and 65 become the lower end 63 b of the transporter body 61. Alternatively, there is a structure in which the lower end of the lower door 72 is the lower end 63b.

  Specifically, one side wall 65 of the transporter main body 61 is fixed to the first governor frame 47 so that the lower end 63b is positioned below the lower end 49b of the first governor frame 47. The other side wall 64 is fixed to the second governor frame 48 so that the lower end 63b is positioned below the lower end 49b of the second governor frame 48.

  In this way, the drive unit 55 and the connecting pipe 59 are disposed above the upper surface 63a of the bottom wall 63 of the transporter main body 61, and the lower end 63b of the transporter 60 is disposed below the lower end 49b of the governor frame 42. Accordingly, the length from the lower end 63b of the transporter 60 to the upper surface 63a of the bottom wall 63 of the transporter main body 61 can be reduced.

  The door 70 has an upper door 71 formed so that the upper half range of the opening 62 can be opened and closed, and a lower door 72 formed so that the range of the lower part of the opening 62 can be opened and closed. In the present embodiment, the range near the lower edge of the opening 62 is opened and closed by the tread plate 100 described later, so the lower door 72 is opened and closed by the tread plate 100 in the lower half range of the opening 62. The range excluding the range to be opened and closed is formed.

  The upper door 71 has a size capable of covering the upper half range of the opening 62 in the front-rear direction F, and as an example, the planar shape is rectangular. The lower door 72 has a size that can cover the range of the lower half of the opening 62 excluding the range opened and closed by the tread plate 100 in the front-rear direction F. As an example, the planar shape is It is a rectangle. The length of the upper door 71 in the vertical direction V and the length of the lower door 72 in the vertical direction V are substantially the same. Further, both end portions of the upper door 71 and the lower door 72 in the width direction W will be specifically described later.

  When the upper door 71 is viewed in the front-rear direction F, the state in which the upper door 71 is in the position covering the upper half range of the opening 62 is the state in which the upper door 71 is in the upper door closed position P1. The state in which the upper door 71 is in the position to open the opening is the state in which the upper door 71 is in the upper door opening position P2 (shown in FIG. 12). The upper door opening position P2 is a position above the upper door closing position P1.

  When the lower door 72 is in a position that covers a range excluding the range opened and closed by the tread plate 100 in the lower half range of the opening 62 when viewed in the front-rear direction F, the lower door 72 is for the lower door. The state is in the closed position P3. The state where the lower door 72 is at the position where the opening 62 is opened is the state where the lower door 72 is at the lower door opening position P4 (shown in FIG. 12). That is, the lower door opening position P4 is substantially the same position in the vertical direction V as the upper door opening position P2. The lower door opening position P4 is an upper position with respect to the lower door closing position P3.

  The state in which the upper door 71 is in the upper door open position P2 and the lower door 72 is in the lower door open position P4 is a state in which the door 70 is in the open position. The state in which the door 70 is in the open position is a state in which the door 70 is fully opened. Here, the state of full opening indicates that the door 70 is open to a preset maximum open position.

  The state in which the upper door 71 is in the upper door closed position P1 and the lower door 72 is in the lower door closed position P3 is a state in which the door 70 is in the closed position. The state in which the door 70 is in the closed position indicates a preset state in which the opening 62 is in the most closed position. In the present embodiment, as described above, the range in the vicinity of the lower edge of the opening 62 is opened and closed by the tread plate 100 described later. For this reason, in this embodiment, the position where the door 70 closes the opening 62 most is a position that covers the range except the range where the opening 62 is opened and closed by the tread plate 100.

  FIG. 6 is a cross-sectional view of the transporter 60 shown along the cross section F6-F6 shown in FIG. FIG. 6 shows a front end portion of one end portion in the width direction W of the transporter 60. More specifically, FIG. 6 shows the side ends of the upper door 71 and the lower door 72 and their surroundings. As shown in FIG. 6, the lower door 72 is disposed rearward with respect to the upper door 71. The upper door 71 is longer in the width direction W than the lower door 72. For this reason, both ends in the width direction of the upper door 71 protrude outward in the width direction from both ends in the width direction of the lower door 72. In addition, in FIG. 6, although the one end part of the width direction W of the upper door 71 is shown, it is the same also in an other end part. The door 70 is supported on the transporter main body 61 by a door guide mechanism 80 described later.

  The door guide mechanism 80 performs an opening / closing operation of the upper door 71, in other words, an opening / closing operation of the upper door guide rail 81 formed to be able to guide the movement in the vertical direction V and the lower door 72, in other words, movement in the vertical direction V. The lower door guide rail 82 is formed so as to be guided, the upper door guide roller 83 is provided on the upper door 71, and the lower door guide roller 84 is provided on the lower door 72.

  One upper door guide rail 81 is disposed in the vicinity of both ends in the width direction of the upper door 71, and is fixed to the transporter body 61. The upper door guide rail 81 has at least a length capable of guiding the movement of the upper door 71 between the upper door closed position P1 and the upper door open position P2. In this embodiment, the upper door guide rail 81 extends from the lower end to the upper end of the transporter body 61 as an example. The upper door guide rail 81 has a concave shape that opens inward in the width direction.

  The upper door guide rollers 83 are provided at both ends of the upper door 71 in the width direction. The rotation axis of the upper door guide roller 83 is parallel to the width direction W. The number of the upper door guide rollers 83 provided at each of the one end and the other end in the width direction of the upper door 71 may be one or plural.

  The upper door guide roller 83 is accommodated in the upper door guide rail 81. The upper door guide roller 83 has a size that fits inside the upper door guide rail 81. When the upper door 71 moves in the vertical direction V, the upper door guide roller 83 rotates by contacting the inner surface of the upper door guide rail 81, so that the movement of the upper door 71 in the vertical direction V is It is guided by a door guide rail 81. Further, the upper door 71 is smoothly moved in the vertical direction V by the upper door guide roller 83.

  The size of the upper door guide roller 83 is not a size that fits into the upper door guide rail 81 but may be smaller than the accommodation space in the upper door guide rail 81. The size of the upper door guide roller 83 is set so that the vertical movement of the upper door 71 can be smoothly guided.

  One lower door guide rail 82 is disposed in the vicinity of both ends in the width direction of the lower door 72, and is fixed to the transporter body 61. The lower door guide rail 82 has at least a length capable of guiding the movement of the lower door 72 between the lower door closed position P3 and the lower door open position P4. In the present embodiment, the lower door guide rail 82 extends from the lower end to the upper end of the transporter body 61 as an example. The lower door guide rail 82 has a concave shape that opens inward in the width direction.

  The lower door guide rollers 84 are provided at both ends of the lower door 72 in the width direction. The rotation axis of the lower door guide roller 84 is parallel to the width direction. The number of lower door guide rollers 84 provided at each of one end and the other end in the width direction of the lower door 72 may be one or plural.

  The lower door guide roller 84 is accommodated in the lower door guide rail 82. The lower door guide roller 84 has a size that fits within the lower door guide rail 82. When the lower door 72 moves in the vertical direction V, the lower door guide roller 84 rotates by contacting the inner surface of the lower door guide rail 82. Therefore, the movement of the lower door 72 in the vertical direction V It is guided by a door guide rail 82. Further, the lower door guide roller 84 makes the movement of the lower door 72 in the vertical direction V smooth.

  Note that the size of the lower door guide roller 84 is not a size that fits into the lower door guide rail 82 but may be smaller than the accommodation space in the lower door guide rail 82. The size of the lower door guide roller 84 is set so that the vertical movement of the lower door 72 can be smoothly guided.

  FIG. 7 is a schematic diagram of the cross-sectional view shown in FIG. 5, schematically showing the door opening / closing mechanism 90. The door opening / closing mechanism 90 will be described with reference to FIG. In FIG. 7, the upper door 71 in the upper door closed position P1 is indicated by a two-dot chain line, and is an upper position above the upper door closed position P1 and below the upper door open position P2. The door 71 is indicated by a solid line. The lower door 72 at the lower door closed position P3 is indicated by a two-dot chain line, and is lower than the lower door closed position P3 and lower than the lower door open position P4. 72 is indicated by a solid line.

  As shown in FIG. 7, the door opening / closing mechanism 90 includes a door opening / closing mechanism pulley 91 that is freely rotatable, and a door opening / closing mechanism electric motor 92 that is rotatably formed on the door opening / closing mechanism pulley 91. The door opening / closing mechanism chain 93 that is turned around the door opening / closing mechanism pulley 91 and connected at one end to the upper end of the lower door 72, and the opening / closing mechanism connected to the other end of the door opening / closing mechanism chain 93. A counterweight 94 and a door opening / closing mechanism engaging portion 95 provided at the lower end of the lower door 72 are provided.

  The door opening / closing mechanism pulley 91 is rotatably supported by a portion that moves up and down integrally with the transporter main body 61 or the transporter 60. In the present embodiment, the door opening / closing mechanism pulley 91 is rotatably connected to one side wall 65 of the transporter body 61 as an example. As another example, the door opening / closing mechanism pulley 91 may be rotatably supported by the frame 40, for example.

  The rotation axis of the door opening / closing mechanism pulley 91 is parallel to the width direction W. A groove capable of engaging with a door opening / closing mechanism chain 93 described later is formed on the peripheral edge of the door opening / closing mechanism pulley 91.

  The door opening / closing mechanism electric motor 92 is disposed above the upper surface 63 a of the bottom wall 63 of the transporter main body 61, and is fixed to the drive frame 41, for example. The door opening / closing mechanism electric motor 92 is formed so that the door opening / closing mechanism pulley 91 can rotate. The output shaft of the door opening / closing mechanism electric motor 92 is connected to the door opening / closing mechanism pulley 91 via a speed reduction mechanism, for example. The rotation of the output shaft of the door opening / closing mechanism electric motor 92 is transmitted to the door opening / closing mechanism pulley 91 via the speed reduction mechanism.

  The door opening / closing mechanism chain 93 is hung around the door opening / closing mechanism pulley 91. The door opening / closing mechanism chain 93 is formed to be engageable with a groove formed on the peripheral edge of the door opening / closing mechanism pulley 91. Therefore, when the door opening / closing mechanism pulley 91 rotates, the door opening / closing mechanism chain 93 is fed forward or rearward with respect to the door opening / closing mechanism pulley 91.

  One end of the door opening / closing mechanism chain 93 is fixed to the upper end of the lower door 72. As described above, the lower door 72 is disposed rearward with respect to the upper door 71, and therefore, the lower door 72 does not overlap the upper door 71 in the vertical direction V. For this reason, the door opening / closing mechanism chain 93 can be fixed to the upper end portion of the lower door 72.

  Further, the door opening / closing mechanism pulley 91 is disposed at a position in which the front portion of the door opening / closing mechanism chain 93 that is folded back by the door opening / closing mechanism pulley 91 extends in parallel with the vertical direction V. Yes.

  The opening / closing mechanism counterweight 94 is connected to the other end of the door opening / closing mechanism chain 93. In FIG. 7, the opening / closing mechanism counterweight 94 when the lower door 72 is in the lower door closing position P3 is indicated by a two-dot chain line. The opening / closing mechanism counterweight 94 has substantially the same weight as the lower door 72.

  The door opening / closing mechanism engaging portion 95 is provided at the lower end of the lower door 72. The door opening / closing mechanism engaging portion 95 protrudes forward from the front surface of the lower door 72, and when the lower door 72 moves upward to a position overlapping the upper door 71 in the front-rear direction F, the lower end of the upper door 71 is moved downward from the lower end. It is formed so as to be able to contact upward. Specifically, the door opening / closing mechanism engaging portion 95 protrudes up to a position overlapping the upper door 71 in the vertical direction. In this embodiment, the door opening / closing mechanism engaging portion 95 extends from one end in the width direction W to the other end of the lower door 72 from the other end.

  FIG. 8 is a front view showing the transporter 60 in a state in which the upper door 71 is in the upper door closed position P1 and the door opening / closing mechanism engaging portion 95 has been moved to a position where it abuts against the lower edge of the upper door 71. is there. FIG. 8 shows a state where the range covered by the lower door 72 in the opening 62 is opened.

  As shown in FIG. 8, a tread plate 100 is provided at the lower end of the transporter main body 61. The tread board 100 has a plate shape. The tread board 100 is accommodated in the transporter main body 61 and has a length extending from one side wall part 64 to the other side wall part 65.

  As shown in FIG. 7, the tread plate 100 is rotatably supported by the transporter main body 61 by the support portion 101. As another example, the tread plate 100 may be rotatably supported by the support portion 101 at a portion that moves up and down integrally with the transporter body 61. As another example, the tread board 100 may be rotatably supported on the frame 40 by the support portion 101.

The rotation axis of the tread board 100 is parallel to the width direction W. The tread plate 100 is supported by the support portion 101 so as to be rotatable between a tread plate closed position P6 and a tread plate open position P7 where the tread plate 100 protrudes outside the transporter body 61 through the opening 62. In the tread board open position P7, the tread board 100 is in a posture in which the upper surface thereof is substantially perpendicular to the vertical direction V.

  The tread board closed position P6 is retracted toward the accommodation space in the transporter body 61 so that the transport board 60 does not contact the floor or ceiling of each floor of the building under construction when the transporter 60 moves up and down. Position. In the present embodiment, the tread plate 100 also has a function of covering the range near the lower edge of the opening 62 in the front-rear direction F when the tread plate 100 is in the tread plate closed position P6. For this reason, the tread plate 100 assumes a posture substantially parallel to the vertical direction V at the tread plate closed position P6.

  The support portion 101 has a stopper function that stops the rotation at the tread plate opening position P7 when the tread plate 100 rotates from the tread plate closing position P6 side toward the tread plate opening position P7. In addition, this stopper structure may be provided in the carrier main body 61 instead of the support portion 101.

  Return springs 102 are provided at the lower ends of the side wall portions 64 and 65 of the transporter main body 61. The return spring 102 is, for example, a spring spring, and is arranged in a posture in which its axis is parallel to the front-rear direction F. Further, the return spring 102 is formed so as to be able to come into contact with the tread plate 100 in the tread plate closing position P6 from the rear.

  The tread board opening / closing mechanism 110 is configured to be able to open and close the tread board 100 in conjunction with the opening and closing of the door 70. Specifically, the tread plate opening / closing mechanism 110 is turned to the first tread plate opening / closing mechanism pulley 111, the second tread plate opening / closing mechanism pulley 112, and the tread plate opening / closing mechanism pulleys 111, 112 formed to be rotatable. A tread plate opening / closing mechanism chain 113 that is hooked and connected at one end to the tread plate 100, a first tread plate opening / closing mechanism engaging portion 114 provided at the other end of the tread plate opening / closing mechanism chain 113, and the upper door 71. And a second tread plate opening / closing mechanism engaging portion 115 formed so as to be engageable with the first tread plate opening / closing mechanism engaging portion 114.

  The first tread plate opening / closing mechanism pulley 111 is disposed, for example, in the vicinity of the door opening / closing mechanism pulley 91 on the outer side in the width direction of the transporter main body 61, and is rotatably supported by, for example, the side wall 65 of the transporter main body 61. ing. The first tread plate opening / closing mechanism pulley 111 may be rotatably supported by the carrier body 61 or a part that moves up and down integrally with the carrier 60. As another example, the first treadle opening / closing mechanism pulley 111 may be rotatably supported by the frame 40 that moves up and down integrally with the transporter 60 instead of the transporter main body 61.

  In FIG. 5 and FIGS. 9, 11, and 13, which will be described later, the door opening / closing mechanism 90 disposed in the vicinity of the tread board opening / closing mechanism 110 is omitted for easy understanding of the tread board opening / closing mechanism 110. In the present embodiment, the footboard opening / closing mechanism 110 is disposed on the same side as the door opening / closing mechanism 90 on the outer side in the width direction of the transporter main body 61. As another example, the tread board opening / closing mechanism 110 may be provided on the opposite side in the width direction with respect to the side on which the door opening / closing mechanism 90 is provided.

  In the present embodiment, the first tread plate opening / closing mechanism pulley 111 is rotatably supported in the vicinity of the door opening / closing mechanism pulley 91 on the side wall portion 64 of the transporter main body 61. The first tread plate opening / closing mechanism pulley 111 is disposed behind the lower door 72. Further, the first tread plate opening / closing mechanism pulley 111 is located behind the support portion 101 of the tread plate 100.

  The rotation axis of the first tread plate opening / closing mechanism pulley 111 is parallel to the width direction W. On the periphery of the first tread plate opening / closing mechanism pulley 111, a groove is formed in which a later-described tread plate opening / closing mechanism chain 113 can be engaged.

  In the present embodiment, the second tread plate opening / closing mechanism pulley 112 is the same as the first tread plate opening / closing mechanism pulley 111, for example. The diameter of the first tread plate opening / closing mechanism pulley 111 and the second tread plate opening / closing mechanism pulley 112 are the same. The second tread plate opening / closing mechanism pulley 112 is arranged on the outer side in the width direction of the transporter body 61 on the side where the first tread plate opening / closing mechanism pulley 111 is arranged.

  The second tread plate opening / closing mechanism pulley 112 is rotatably supported by the transporter body 61 or a part that moves up and down integrally with the transporter 60. The rotation axis of the second tread plate opening / closing mechanism pulley 112 is parallel to the width direction W. In the present embodiment, the second tread plate opening / closing mechanism pulley 112 is rotatably supported by the side wall 65. As another example, instead of the transporter main body 61, for example, it may be rotatably supported by the frame 40 that moves up and down integrally with the transporter 60.

  The rotation axes of the treadle opening / closing mechanism pulleys 111 and 112 are aligned in the vertical direction V. On the periphery of the second tread plate opening / closing mechanism pulley 112, a groove that can be engaged with a later-described tread plate opening / closing mechanism chain 113 is formed.

  The treadle opening / closing mechanism chain 113 is turned around the treadle opening / closing mechanism pulleys 111, 112, and is engaged with the treadle opening / closing mechanism pulleys 111, 112. Since the treadle opening / closing mechanism pulleys 111 and 112 are the same, and the rotation axes of the treadle opening / closing mechanism pulleys 111 and 112 are aligned in the vertical direction V, the first tread in the treadboard opening / closing mechanism chain 113. A portion between the opening / closing mechanism pulley 111 and the second tread plate opening / closing mechanism pulley 112 extends in the vertical direction V in parallel.

  In the tread plate opening / closing mechanism chain 113, the end portion of the rear portion across the first tread plate opening / closing mechanism pulley 111 is connected to the end portion of the tread plate 100. The end portion referred to here is an end portion that is located on the opposite side to the support portion 101 in the member width direction of the tread plate 100, and a front end that protrudes outside the transporter body 61 when the tread plate 100 is in the tread plate open position P7. Part. The member width direction of the tread board 100 is the width direction of the tread board 100 itself before the tread board 100 is attached to the transporter body 61, and is attached to the transporter body 61 and in the tread board open position P7. , The front-rear direction F.

  In the tread plate 100, the tip end portion that protrudes outside the carrier main body 61 when in the tread plate open position P7 protrudes outside the carrier main body 61 with respect to the support portion 101 in a side view (as viewed in the width direction W). It is an example of the part of the front end side.

  The tread plate opening / closing mechanism chain 113 is not limited to being connected to the above-described end portion. The tread plate opening / closing mechanism chain 113 may be connected to the front portion of the tread plate 100 at the tread plate open position P7 with respect to the rotation axis A of the support portion 101. In other words, if the tread plate opening / closing mechanism chain 113 is connected to a portion of the tread plate 100 between the tip protruding outward when the tread plate open position P7 is located and the rotation axis A serving as the rotation center. Good.

  The tread plate opening / closing mechanism chain 113 is connected to a portion of the tread plate 100 between a tip that protrudes outward when the tread plate open position P7 is in the tread plate open position P7 and the rotation axis A serving as a rotation center. By pulling the tread plate 100 at the tread plate open position P7 through the opening / closing mechanism chain 113, the tread plate 100 can be rotated from the tread plate open position P7 to the tread plate close position P6.

  Another example of the portion between the tip protruding outward when the tread plate 100 is in the tread plate open position P7 and the rotation axis A serving as the rotation center may be in the vicinity of the end portion. . In addition, by providing the chain 113 for the tread plate opening / closing mechanism at the end portion, the tread plate 100 can be opened / closed with a relatively small force.

An end portion connected to the tread plate 100 in the tread plate opening / closing mechanism chain 113 is connected to the tread plate 100 so as to be rotatable around the width direction W. Therefore, when the tread plate 100 rotates between the tread plate closed position P6 and the tread plate open position P7, the end portion connected to the tread plate 100 in the tread plate opening / closing mechanism chain 113 is used to rotate the tread plate 100. The tread plate opening / closing mechanism chain 113 is prevented from bending because the tread plate opening / closing mechanism chain 113 is tensioned as will be described later. In the tread plate opening / closing mechanism chain 113, the first tread plate opening / closing mechanism pulley 111 is fixed to the end of the front portion. The first tread plate opening / closing mechanism engaging portion 114 applies tension to the tread plate opening / closing mechanism chain 113 so that the tread plate opening / closing mechanism chain 113 is stretched, and the tread plate 100 at the tread plate open position P7 is used for the tread plate. It has a weight that can be maintained at the tread plate open position P7 without rotating toward the closed position P6.

  The weight of the first tread plate opening / closing mechanism engaging portion 114 will be specifically described. When the tread plate 100 is in the tread plate opening position P7, the weight of the first tread plate opening / closing mechanism engaging portion 114 acts on the tread plate 100 via the tread plate opening / closing mechanism chain 113. This weight acts so as to rotate the tread plate 100 toward the tread plate closing position P6.

  Therefore, in order to make it possible to maintain the first tread plate opening / closing mechanism engaging portion 114 and the tread plate 100 in the tread plate open position P7 in the tread plate open position P7, the tread plate 100 in the tread plate open position P7 is used for the tread plate. The weight is such that it does not rotate toward the closed position P6.

  The second tread plate opening / closing mechanism engaging portion 115 is provided at the width direction end of the upper door 71 on the side where the first tread plate opening / closing mechanism pulley 111 is provided. More specifically, the second tread plate opening / closing mechanism engaging portion 115 is provided in the middle portion of the upper door 71 in the vertical direction V and protrudes toward the portable device body 61. The second footboard opening / closing mechanism engaging portion 115 is formed to be engageable with the first footboard opening / closing mechanism engaging portion 114.

  The shape of the second tread board opening / closing mechanism engaging portion 115 will be specifically described. As shown in FIG. 6, the second tread plate opening / closing mechanism engaging portion 115 is provided at the first portion 116 extending rearward from the upper door 71 and the tip of the first portion 116, and is folded forward. 2 portions 117.

  The first portion 116 extends rearward to a position exceeding the center of the material axis of the tread plate opening / closing mechanism chain 113. The second portion 117 is formed in a substantially J shape as a whole in plan view together with the first portion 116 so as to surround the tread plate opening / closing mechanism chain 113 in a clockwise direction and to be slidable. ing.

  The second portion 117 is formed so as to pass through a position away from the tread plate opening / closing mechanism chain 113 so as not to contact the tread plate opening / closing mechanism chain 113. Therefore, when the upper door 71 moves downward, the second tread plate opening / closing mechanism engaging portion 115 can come into contact with the first tread plate opening / closing mechanism engaging portion 114 from above.

  Here, the length of the tread plate opening / closing mechanism chain 113 will be specifically described. As shown in FIG. 7, in the tread plate opening / closing mechanism chain 113, when the upper door 71 is in the upper door closed position P1, the second tread plate opening / closing mechanism engaging portion 115 is engaged with the first tread plate opening / closing mechanism engagement. The tread plate 100 can be held at the tread plate closing position P6 via the tread plate opening / closing mechanism chain 113 by contacting the joint portion 114 from above to below and pushing down the first tread plate opening / closing mechanism engaging portion 114. It has a length.

  Next, the operation of the transporter 60 will be described. First, the raising / lowering operation | movement of the transporter 60 is demonstrated. After the operator gets into the transporter 60, the controller provided in the transporter 60 is operated to raise the transporter 60.

  When the controller is operated, the drive unit electric motor 57 is driven. The rotation of the output shaft of the drive unit electric motor 57 is transmitted to the pinion 56 via the speed reducer 58. As the pinion 56 rotates, the pinion 56 moves upward with respect to the rack 30 fixed to the post 20. This causes the transporter 60 to rise.

  Similarly, when the controller is operated to lower the transporter 60, the output shaft of the drive unit electric motor 57 rotates in reverse to the case where the transporter 60 is lifted. When the output shaft of the drive unit electric motor 57 rotates in the reverse direction with respect to the rising, the transporter 60 is lowered.

  Vibration when the transporter 60 moves up and down mainly occurs in the drive frame 41 to which the drive unit 55 is fixed. When the link member 50 is interposed between the drive frame 41 and the governor frame 42 to which the transporter 60 is fixed, the governor frame 42 can swing with respect to the drive frame 41. In other words, the drive frame 41 can swing with respect to the governor frame 42. For this reason, even if the drive frame 41 vibrates, this vibration is prevented from being transmitted to the governor frame 42.

  Further, the link member 50 is connected to the drive frame 41 by the first shaft member 53 and is connected to the governor frame 42 by the second shaft member 54. For this reason, the vibration of the drive frame 41 is further prevented from being transmitted to the governor frame 42.

  Next, the opening / closing operation | movement of the door 70 is demonstrated. The controller that controls the drive of the door opening / closing mechanism electric motor 92 is set so as not to drive the door opening / closing mechanism electric motor 92 when the transporter 60 is lifted or lowered.

  First, the operation of moving the door 70 from the closed position to the open position, in other words, from the state where the lower door 72 is in the lower door closed position P3 and the upper door 71 is in the upper door closed position P1, The operation when moving 72 to the lower door opening position P4 and moving the upper door 71 to the upper door opening position P2 will be described.

  When the operator operates the controller to open the door 70, as shown in FIG. 7, the door opening / closing mechanism electric motor 92 is driven, and the door opening / closing mechanism pulley 91 rotates to move the lower door 72 upward. Move. Then, as the door opening / closing mechanism pulley 91 is rotated, the door opening / closing mechanism chain 93 is extended rearward, whereby the door opening / closing mechanism chain 93 moves the lower door 72, and the lower door closing position P3 shown in FIG. Lift up from the state of The opening and closing operation of the lower door 72 is guided by the lower door guide rail 82.

  FIG. 9 is a cross-sectional view of the transporter 60 taken along the line F9-F9 shown in FIG. As shown in FIGS. 8 and 9, when the lower door 72 is lifted, the door opening / closing mechanism engaging portion 95 provided on the lower door 72 is moved downward from the lower edge of the upper door 71 at the upper door closed position P1. Abuts upward.

  When the upper door 71 is in the upper door closed position P1, the second tread plate opening / closing mechanism engaging portion 115 provided on the upper door 71 presses the first tread plate opening / closing mechanism engaging portion 114 from above. Is maintained. For this reason, even if the lower door 72 moves, the tread plate opening / closing mechanism chain 113 is not drawn out along with this movement, so that the tread plate 100 is held in the tread plate closed position P6.

  FIG. 10 is a front view showing a state where the lower door 72 is further raised with respect to the state shown in FIG. 8 and is being raised to the lower door opening position P4. FIG. 11 is a cross-sectional view of the carrying device 60 shown along the cross section F11-F11 shown in FIG. As shown in FIGS. 10 and 11, when the lower door 72 rises, the door opening / closing mechanism engaging portion 95 provided on the lower door 72 pushes the upper door 71 upward. For this reason, the upper door 71 rises as the lower door 72 rises.

  When the upper door 71 rises, the second tread plate opening / closing mechanism engaging portion 115 provided on the upper door 71 rises along with the upper door 71. When the second tread plate opening / closing mechanism engaging portion 115 is raised, the first tread plate opening / closing mechanism engaging portion 114 is also raised, so that the tread plate 100 is rotated from the tread plate closed position P6 toward the tread plate open position P7. To start.

  The start of turning of the tread board 100 will be specifically described. In the tread plate closed position P6, the tread plate 100 is transmitted to the tread plate 100 by the tread plate opening / closing mechanism chain 113 and the force acting to rotate toward the tread plate open position P7 by the elastic force of the return spring 102. The force to be held at the use closed position P6 is balanced.

  For this reason, when the tread plate opening / closing mechanism chain 113 is extended rearward as the upper door 71 rises, the force by the tread plate opening / closing mechanism chain 113 to hold the tread plate 100 in the tread plate closing position P6 is eliminated. The tread plate 100 acts only by a force that rotates toward the tread plate opening position P7 due to the elastic force (restoring force) of the return spring 102, and is therefore pushed out toward the tread plate opening position P7 by this inherent restoring force. .

  Further, the tread plate 100 is caused by its own weight rather than the force acting to rotate the tread plate 100 toward the tread plate closed position P6 due to the weight of the first tread plate opening / closing mechanism engaging portion 114. Since the force acting so as to rotate toward the open position P7 is larger, the tread plate 100 starts to rotate from the tread plate closed position P6 toward the tread plate open position P7.

  As shown in FIG. 11, when the upper door 71 rises to a position between the upper door closed position P1 and the upper door open position P2, the tread plate 100 rotates to the tread plate open position P7. The tread board 100 is passed from the lower end edge of the opening 62 to the floor 5 of the floor where the transporter 60 is stopped in the building under construction.

  When the tread plate 100 reaches the tread plate opening position P7, the upward movement of the first tread plate opening / closing mechanism engaging portion 114 is stopped. Therefore, when the upper door 71 moves upward from the state shown in FIG. 11, the second tread plate opening / closing mechanism engaging portion 115 is separated from the first tread plate opening / closing mechanism engaging portion 114.

  FIG. 12 is a front view showing the transporter 60 in a state where the lower door 72 is in the lower door open position P4 and the upper door 71 is in the upper door open position P2. FIG. 13 is a cross-sectional view of the transporter 60 along the cross section F13-F13 shown in FIG. As shown in FIGS. 12 and 13, when the lower door 72 is opened to the lower door opening position P4, that is, when the door 70 is opened to the opened position, the door opening / closing mechanism electric motor 92 is stopped. When the door 70 is opened to the open position in order to maintain the state where the door 70 is in the open position, the rotation of the output shaft of the door opening / closing mechanism electric motor 92 is locked.

  For example, the transporter 60 is provided with a switch for detecting a state in which the lower door 72 is in the lower door open position P4. When the switch detects that the lower door 72 is in the lower door opening position P4, the control unit that controls the driving of the door opening / closing mechanism electric motor 92 based on the detection result of the switch causes the door opening / closing mechanism electric motor 92 to operate. To stop.

  In the present embodiment, when the lower door 72 is in the lower door open position P4, the upper door 71 is also in the upper door open position P2, so the switch detects a state in which the door 70 is in the open position. Therefore, the state where the lower door 72 is in the lower door open position P4 is detected. As another example, a state where the upper door 71 is in the upper door open position P2 may be detected. The means for detecting the state in which the door 70 is in the open position is not limited to the above switch.

  When the lower door 72 rises to the lower door open position P4 and the upper door 71 rises to the upper door open position P2, the worker can go out of the transporter body 61 through the opening 62. In addition, it is possible to carry in or carry out luggage.

  At this time, since the tread board 100 is in the tread board open position P7, the tread board 100 fills the gap S between the lower end edge of the opening 62 of the transporter body 61 and the floor 5 of the floor on which the transporter body 61 lands. It is possible to efficiently carry in or carry out the luggage.

  Next, the operation of moving the door 70 from the open position to the closed position will be described. As shown in FIGS. 12 and 13, the opening 62 is in the open position, that is, the upper door 71 is in the upper door open position P2 and the lower door 72 is in the lower door open position P4. The operator operates the controller to close the door 70.

  Then, the door opening / closing mechanism electric motor 92 rotates in the opposite direction to the rotation direction when the door 70 is opened, and the door opening / closing mechanism pulley 91 is also opposite in the rotation direction when the door 70 is opened. Rotate.

  As the door opening / closing mechanism pulley 91 rotates in a direction to close the door 70, the door opening / closing mechanism chain 93 is fed forward. When the door opening / closing mechanism chain 93 is drawn forward, the lower door 72 starts to move downward. When the lower door 72 moves downward, the upper door 71 supported by the door opening / closing mechanism engaging portion 95 provided on the lower door 72 also moves downward.

  When the upper door 71 is lowered to the position shown in FIG. 11, the second tread plate opening / closing mechanism engaging portion 115 provided on the upper door 71 contacts the first tread plate opening / closing mechanism engaging portion 114 from above. When the upper door 71 is further lowered, the second tread plate opening / closing mechanism engaging portion 115 pushes down the first tread plate opening / closing mechanism engaging portion 114, whereby the tread plate opening / closing mechanism chain 113 is fed forward. 100 starts to rotate from the tread board open position P7 toward the tread board close position P6.

  As shown in FIG. 9, when the upper door 71 is lowered to the upper door closed position P1, the tread plate 100 is rotated to the tread plate closed position P6. When the tread plate 100 returns from the tread plate open position P <b> 7 to the tread plate close position P <b> 6, the tread plate 100 contacts the return spring 102. The tread plate 100 is caused to rotate toward the tread plate open position P7 side by the force to rotate toward the tread plate close position P6 side by the tread plate opening / closing mechanism chain 113 and the elastic force of the return spring 102. And force to act. In the tread plate closing position P <b> 6, the force by the tread plate opening / closing mechanism chain 113 and the force by the return spring 102 are balanced.

  When the lower door 72 is further lowered, the door opening / closing mechanism engaging portion 95 provided on the lower door 72 is separated from the lower end of the upper door 71. As shown in FIG. 5, when the lower door 72 is lowered to the lower door closing position P3, the drive of the door opening / closing mechanism electric motor 92 is stopped.

  For example, the transporter 60 is provided with a switch for detecting the position of the lower door 72, and when this switch detects that the lower door 72 is in the lower door closed position P3, based on the detection result of the switch, A control unit that controls driving of the door opening / closing mechanism electric motor 92 stops driving the door opening / closing mechanism electric motor 92.

  Note that the switch detects a state in which the lower door 72 is in the lower door closed position P3 as a state in which the door 70 is in the closed position. The means for detecting the state in which the lower door 72 is in the lower door closed position P3 is not limited to the above switch.

  In the state where the door 70 is in the closed position, the rotation of the output shaft of the door opening / closing mechanism electric motor 92 is locked so that the door 70 does not open unexpectedly without being operated to open the door 70. .

  In the elevator 10 configured as described above, the drive unit electric motor 57 is disposed above the upper surface 63 a of the bottom wall 63 of the transporter body 61, and the door 70 is moved upward with respect to the transporter body 61. Since the opening 62 is thus opened, it is possible to easily get on and off the carrier 60 landing on the ground floor. This point will be specifically described.

  When the drive unit electric motor 57 is disposed below the transporter 60, the lowermost end of the drive unit electric motor 57 becomes the lowermost end of the transporter 60, so that the upper surface 63 a of the bottom wall 63 from the position of the lowermost end of the transporter 60. The length up to becomes longer. Furthermore, if the opening 70 is opened by moving the door 70 downward, when the door 70 is moved to the open position, the door 70 protrudes downward with respect to the transporter body 61.

  Thus, while the length to the position which becomes the lowest end of the transporter 60 and the upper surface 63a of the bottom wall part 63 becomes long, the door 70 protrudes downward from the transporter main body 61 in the state where the opening 62 is opened. When landing 60 on the ground floor, the height from the ground to the upper surface 63a of the bottom wall 63 is increased in consideration of the drive motor 57 and the amount of protrusion of the door 70 with respect to the transporter body 61. There must be.

  For this reason, in order to get on and off the transporter 60 landing on the ground floor, a stage for compensating for the height difference between the ground 1 and the upper surface 63a of the bottom wall portion 63 is required. For this reason, it becomes difficult to get on and off the transporter 60 landing on the ground floor.

  However, in the elevator 10 of the present embodiment, the drive unit electric motor 57 is disposed above the ceiling wall 67 of the transporter main body 61, and the door 70 is configured to open the opening 62 by moving upward. is there.

  For this reason, when landing the transporter 60 on the ground floor, there is no need to make a large gap between the ground and the transporter 60. In other words, the height difference between the ground and the upper surface 63a of the bottom wall 63 can be reduced. For this reason, a stage for compensating for the height difference between the ground surface and the upper surface 63a of the bottom wall portion 63 is not required, so that the loading / unloading of the carrier 60 on the ground floor can be easily performed.

  In addition, by disposing the speed reducer 58 and the pinion 56 of the drive unit 55 above the upper surface 63a of the bottom wall 63, there is no need to provide an arrangement space for disposing the drive unit 55 below the transporter 60. It is possible to more easily get on and off the carrier 60 landing on the ground floor.

  Further, since the connecting pipe 59 is disposed above the upper surface 63a of the bottom wall portion 63, it is not necessary to provide an arrangement space for disposing the connecting pipe 59 below the transporter 60. Therefore, the transporter 60 that is landed on the ground floor. It is possible to more easily get on and off.

  Moreover, the elevator 10 can be made compact by providing the drive part 55 and the connecting pipe 59 in the position which overlaps the ceiling wall part 67 in the up-down direction V above the carrying body 61. FIG.

  This point will be specifically described. By providing the driving unit 55 and the connecting pipe 59 at a position above the portable body 61 and overlapping the ceiling wall 67 in the vertical direction V, the driving unit 55 and the connecting pipe 59 are transported with respect to the transporter 60. Protruding in a direction perpendicular to the moving direction of 60 can be prevented.

  For example, when the drive unit 55 is provided on the outer side in the width direction with respect to the side wall parts 64 and 65 of the transporter 60, the drive unit 55 projects outward in the width direction with respect to the transporter 60. Since the drive unit 55 protrudes outward in the width direction with respect to the transporter 60, the space between both the posts 20 must be widened, so that the elevator 10 is enlarged.

  Further, when the connecting pipe 59 is disposed forward of the door 70 or rearward of the rear wall 66, the connecting pipe 59 projects in the front-rear direction F with respect to the transporter 60. Since the connecting pipe 59 protrudes in the front-rear direction F with respect to the transporter 60, a wide range in the front-rear direction F must be ensured in the front-rear direction F during raising and lowering, and thus the elevator 10 is increased in size.

  However, in this embodiment, the drive part 55 and the connection pipe 59 are provided in the position which overlaps the ceiling wall part 67 in the up-down direction V above the carrying device 60. Further, most of the drive unit 55 is accommodated in a range overlapping the ceiling wall portion 67 in the vertical direction V. For this reason, since it can prevent that the drive part 55 and the connection pipe 59 protrude in the direction perpendicular | vertical to the moving direction of the transporter 60 with respect to the transporter 60, the elevator 10 can be made compact.

  The frame 40 has a drive frame 41 and a governor frame 42, and the drive frame 41 and the governor frame 42 are connected to each other by a link member 50. Therefore, the frame 40 can be disassembled into the drive frame 41 and the governor frame 42. Since the frame 40 can be disassembled into the drive frame 41 and the governor frame 42, the assembly work of the elevator 10 and the disassembly work of the elevator 10 can be simplified. This point will be specifically described.

  For example, the elevator 10 is assembled for each component in a factory located at a place different from the construction site, and then transported to the construction site and assembled. At this time, the transporter 60 is transported from the factory to the building site in a state assembled to the frame 40.

  In the present embodiment, since the frame 40 can be disassembled into the drive frame 41 and the governor frame 42, the drive frame 41 can be disassembled with respect to the integrated body of the transporter 60 and the governor frame 42.

  For this reason, since the integrated object of the carrying device 60 and the frame 40 can be made compact as much as the drive frame 41 can be disassembled, the carrying work of the integrated material of the carrying device 60 and the frame 40 can be simplified.

  Further, since the drive frame 41 can be disassembled with respect to the integrated body of the transporter 60 and the governor frame 42, the operation of connecting the integrated body of the transporter 60 and the frame 40 to the post 20 is driven with respect to the post 20. The operation of connecting the frame 41 and the operation of connecting the integrated body of the carrier 60 and the governor frame 42 to the post 20 and the drive frame 41 can be divided. By dividing the work, the weight associated with the work can be distributed. Specifically, when the drive frame 41 is connected, the weight of the drive frame 41 acts on the worker, and when the integrated unit of the transporter 60 and the governor frame 42 is connected, the transporter 60 and the governor frame are connected. The weight of the unit with 42 acts on the worker. Since the weight associated with the work can be distributed, the work becomes easier. As described above, since the transport work can be simplified and the weight associated with each work can be dispersed, the assembly work and the disassembly work of the elevator 10 can be simplified.

  In addition, the door 70 is divided into an upper door 71 and a lower door 72, and the upper door 71 and the lower door 72 are examples of directions intersecting with the moving direction of the upper door 71 and the lower door 72. Since the upper door 71 and the lower door 72 at the open positions P2 and P4 can be overlapped in the front-rear direction F by being spaced apart in the front-rear direction F, the amount of protrusion of the door 70 protruding from the transporter body 61 can be reduced. Can be small.

  Further, by providing the door opening / closing mechanism engaging portion 95 at the lower end portion of the lower door 72, the upper door 71 and the lower door 72 at the open positions P2 and P4 are substantially aligned with the lower end in the vertical direction V. Therefore, the protrusion amount of the door 70 protruding from the transporter body 61 can be reduced. Further, by making the vertical length of the upper door 71 and the vertical length of the lower door 72 substantially the same, the protruding amount of the door 70 protruding from the transporter main body 61 can be reduced.

  Further, by having the tread board opening / closing mechanism 110, the opening / closing operation of the tread board 100 can be automatically performed in conjunction with the opening / closing operation of the door 70.

  Further, the first tread plate opening / closing mechanism engaging portion 114 of the tread plate opening / closing mechanism 110 has a weight that gives tension to the tread plate opening / closing mechanism chain 113, thereby preventing the tread plate opening / closing mechanism chain 113 from sagging. it can. Since the tread board opening / closing mechanism chain 113 does not sag, it is possible to prevent the tread board opening / closing mechanism chain 113 from coming into contact with the surroundings, for example, the door 70.

  Next, an elevator according to a second embodiment of the present invention will be described with reference to FIG. In addition, the structure which has the same function as 1st Embodiment attaches | subjects the code | symbol same as 1st Embodiment, and abbreviate | omits description. This embodiment differs from the first embodiment in that the second tread plate opening / closing mechanism engaging portion is provided not on the upper door 71 but on the lower door 72. Other structures are the same as those in the first embodiment.

  FIG. 16 is a schematic view showing the transporter 60 of the elevator 10 of the present embodiment in the same manner as FIG. As shown in FIG. 16, in the present embodiment, the second tread board opening / closing mechanism engaging portion 115 is provided on the lower door 72.

  In the present embodiment, since the second tread plate opening / closing mechanism engaging portion 115 is provided on the lower door 72, when the lower door 72 starts to move upward from the lower door closed position P <b> 3, Along with the rise, the tread plate 100 starts to rotate from the tread plate closed position P6 toward the tread plate open position P7. In the present embodiment, as an example, the second tread plate opening / closing mechanism engaging portion 115 is provided in the vertically middle part of the lower door 72.

  The tread plate opening / closing mechanism chain 113 has such a length that the tread plate 100 is in the tread plate closing position P6 when the lower door 72 is in the lower door closing position P3.

  In the present embodiment, the same effect as in the first embodiment can be obtained. In the present embodiment, the opening / closing of the tread plate 100 is linked to the opening / closing of the lower door 72. For this reason, when the door 70 is opened from the fully closed state, compared to the structure in which the second tread plate opening / closing mechanism engaging portion 115 described in the first embodiment is provided in the upper door 71, the tread plate 100 is: Open to the treadle open position P7 at an early stage. In other words, the tread plate 100 can be opened to the tread plate opening position P7 without greatly opening the door 70.

  For this reason, even when it is not necessary to open the door 70 greatly, such as when a small baggage is carried into the transporter main body 61, the tread plate 100 can be opened to the tread plate open position P7, thereby improving the efficiency of the load loading operation. can do.

  In the first and second embodiments, the lower door closed position P <b> 3 of the lower door 72 is a position that covers the range of the lower half of the opening 62 excluding the range opened and closed by the tread plate 100. This is because in the present embodiment, the tread board 100 has a function of opening and closing the opening 62 as an example. As another example, the lower door 72 may be formed so as to cover a range where the tread plate 100 opens and closes in the opening 62. This point will be described with reference to FIG.

  FIG. 17 is a schematic diagram showing a modification of the elevator 10 of the first embodiment, similar to FIG. In FIG. 17, the upper door 71 at the upper door closed position P1 is indicated by a solid line, and is located above the upper door closed position P1 and below the upper door open position P2. Is shown by a two-dot chain line. Further, the lower door 72 at the lower door closed position P3 is indicated by a solid line, and the lower door 72 is located above the lower door closed position P3 and below the lower door open position P4. It is indicated by a two-dot chain line.

  As shown in FIG. 17, the lower door closed position P <b> 3 of the lower door 72 may be a position covering the lower end edge of the opening 62. In other words, the lower door 72 is formed so as to cover a range where the tread plate 100 opens and closes in the opening 62. In this case, the tread plate 100 is disposed at a position retracted backward with respect to the lower door 72 so as not to contact the lower door 72 at the lower door closed position P3. In FIG. 17, the front end portion of the bottom wall portion 63 extends forward with respect to FIG. 7 as the tread plate 100 is disposed at a position retracted backward with respect to the lower door closed position P3. Specifically, the front end portion of the bottom wall portion 63 is extended to a position overlapping the lower end of the lower door 72 in the vertical direction V.

  Also in the second embodiment, the lower door closed position P3 of the lower door 72 may be a position covering the lower edge of the opening 62 as shown in FIG. In other words, in the configuration shown in FIG. 17, the second tread plate opening / closing mechanism engaging portion 115 may be provided on the lower door 72 as described in the second embodiment.

The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above.
The invention described in the initial claims of the present application will be appended below.
[1]
A transporter body comprising a transporter body in which an opening is formed, and a door part capable of opening and closing the opening;
Opening / closing means for moving the door portion between a closed position and an open position positioned above the closed position;
A guide rail for guiding the movement of the carrier;
An electric motor for driving located in a portion above the upper surface of the bottom wall portion of the main body of the transporter in the transporter; and
Conversion means for converting rotation of the output shaft of the drive electric motor into movement of the transporter along the guide rail;
The elevator characterized by comprising.
[2]
The converting means includes
A rack provided on the guide rail;
A pinion that engages the rack;
A speed reduction mechanism for transmitting rotation of the output shaft of the drive electric motor to the pinion;
Comprising
The pinion and the speed reduction mechanism are fixedly positioned on a portion of the carrier body that is above the top surface of the bottom wall portion.
The elevator according to [1], which is characterized in that
[3]
The door part is
A lower door that covers a lower portion of the opening, the lower door being movable between a lower door closed position and an upper lower door open position with respect to the lower door closed position;
An upper door that covers an upper portion with respect to the lower portion of the opening, and is movable between an upper door closed position and an upper door open position above the upper door closed position. Door and
Comprising
The state in which the door portion is in the closed position is a state in which the lower door is in the lower door closed position and the door portion is in the upper door closed position, and the door portion is in the open position. The state in which the lower door is in the lower door open position, and the upper door is in the upper door open position,
The opening / closing means includes
Moving means for moving the lower door between the lower door closed position and the lower door open position;
A door opening / closing mechanism member provided on the lower door, which engages with the upper door in the upper door closed position and pushes up the upper door as the lower door moves toward the lower door open position. Together with
The elevator according to [1] or [2], comprising:
[4]
Treads,
A support portion that rotatably supports one end portion of the tread plate on a lower end portion of the transporter body, and the tread plate open position that protrudes outside the transporter with respect to a lower end edge of the opening; A support portion rotatably supported between the tread board opening position and the tread board closing position rotated toward the inside of the carrier body;
Rotating means for rotating the tread between the tread tread closed position and the tread tread open position;
Comprising
The rotating means is
A pulley,
A transmission member that is turned around the pulley and has one end connected to a portion of the tread between the tip protruding outward and the rotation shaft;
A first engagement portion provided at the other end portion of the transmission member, the first engagement portion having a weight for applying a tension for tensioning the transmission member;
A second engaging portion provided in the door portion, wherein the door portion engages with the first engaging portion when the door portion moves from the open position to the closed position to move the door portion; And a second engaging portion that pushes down the first engaging portion.
The elevator according to [3], comprising:

  DESCRIPTION OF SYMBOLS 10 ... Post (guide rail), 30 ... Rack (conversion means), 56 ... Pinion (conversion means), 57 ... Electric motor for drive part (drive electric motor), 58 ... Reduction gear (conversion means), 60 ... Carrying device 61 ... Carrier body, 62 ... Opening, 70 ... Door (door), 71 ... Upper door, 72 ... Lower door, 90 ... Door opening / closing mechanism (opening / closing means), 91 ... Pull for door opening / closing mechanism (moving means), 92 ... Door opening / closing mechanism electric motor (moving means), 93 ... Door opening / closing mechanism chain (moving means), 95 ... Door opening / closing mechanism engaging portion, 100 ... Tread plate, 101 ... Support portion, 110 ... Tread plate opening / closing mechanism ( Rotating means), 111... First step board opening / closing mechanism pulley (pulley), 113. Step board opening / closing mechanism chain (transmission member), 114. First step board opening / closing mechanism engaging portion (first engaging portion) ), 115... Second tread opening / closing mechanism engaging portion (second engaging portion), 1 ... on the door for the closed position, P2 ... on the door for the open position, P3 ... lower door for the closed position, P4 ... the open position for the lower door, P6 ... treads for the closed position, the open position for P7 ... tread.

Claims (3)

A transporter body comprising a transporter body in which an opening is formed, and a door part capable of opening and closing the opening;
Opening / closing means for moving the door portion between a closed position and an open position positioned above the closed position;
A guide rail for guiding the movement of the carrier;
An electric motor for driving located in a portion above the upper surface of the bottom wall portion of the main body of the transporter in the transporter; and
Conversion means for converting rotation of the output shaft of the electric motor for driving into movement of the transporter along the guide rail, and
The door part is
A lower door that covers a lower portion of the opening, the lower door being movable between a lower door closed position and an upper lower door open position with respect to the lower door closed position;
An upper door that covers an upper portion with respect to the lower portion of the opening, and is movable between an upper door closed position and an upper door open position above the upper door closed position. Door,
Comprising
The state in which the door portion is in the closed position is a state in which the lower door is in the lower door closed position and the upper door is in the upper door closed position, and the door portion is in the open position. The state in which the lower door is in the lower door open position, and the upper door is in the upper door open position,
The opening / closing means includes
Moving means for moving the lower door between the lower door closed position and the lower door open position;
A door opening / closing mechanism member provided on the lower door, which engages with the upper door in the upper door closed position and pushes up the upper door as the lower door moves toward the lower door open position. With the joint,
The elevator characterized by comprising. The converting means includes
A rack provided on the guide rail;
A pinion that engages the rack;
A reduction mechanism that transmits the rotation of the output shaft of the drive electric motor to the pinion,
2. The elevator according to claim 1, wherein the pinion and the speed reduction mechanism are fixedly positioned on a portion of the transporter main body above the upper surface of the bottom wall portion. Treads,
A support portion that rotatably supports one end portion of the tread plate on a lower end portion of the transporter body, and the tread plate open position that protrudes outside the transporter with respect to a lower end edge of the opening; A support portion rotatably supported between the tread board opening position and the tread board closing position rotated toward the inside of the carrier body;
Rotation means for rotating the tread between the tread plate closed position and the tread open position;
The rotating means is
A pulley,
A transmission member that is turned around the pulley and has one end connected to a portion of the tread between the tip protruding outward and the rotation shaft;
A first engagement portion provided at the other end portion of the transmission member, the first engagement portion having a weight for applying a tension for tensioning the transmission member;
A second engaging portion provided in the door portion, wherein the door portion engages with the first engaging portion when the door portion moves from the open position to the closed position to move the door portion; The elevator according to claim 2, further comprising: a second engagement portion that pushes down the first engagement portion.