JP2007276916A - Multi-synchronous type lifter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-synchronous type lifter having a simple structure and compact design. <P>SOLUTION: This multi-synchronous type lifter 3 is constituted by combining two pantograph-type lifters 4, 4 in parallel. Each pantograph 23 has rollers 26, and a connecting shaft 40 for coaxially connecting the four rollers 26 is provided. The connecting shaft 40 is provided with two sprockets 41, 41 each of which is positioned between the two rollers 26 provided in each pantograph-type lifter 4. A synchronous chain 42 extending to a direction orthogonal to the longitudinal direction of the connecting shaft 40 and engaged with the sprocket 41 is provided in each recessed part 21a on an upper face of a base table 21 of each pantograph-type lifter 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plurality of tuned lifters, and more particularly to a mechanism for lifting and lowering a plurality of pantograph lifters so that their heights are uniform.

Patent Document 1 discloses a multi-tuning lifter that raises and lowers a plurality of pantograph lifters so that their heights are equal. The structure of this multi-tuning lifter is shown in FIG. The multi-tuned lifter 100 is a combination of two pantograph lifters 101 that move up and down while keeping the lifting platform 104 parallel to the base 105 by expanding and contracting the pantograph body 103 using a hydraulic jack 102. Is.
As shown in FIG. 6, each hydraulic jack 102 is provided with a ball nut 110, a ball screw shaft 111, an original shaft side bevel gear 112, and a driven side bevel gear 113, thereby synchronizing the reciprocating linear motion of the piston 114. It is extracted as a rotational movement of the shaft 115. The hydraulic jacks 102 are connected to each other by being connected coaxially by a shaft 116 that connects the tuning shafts 115 of the pantograph lifters 101. Thereby, since the movement of each piston 114 synchronizes, each raising / lowering base 104 (FIG. 5) raises / lowers so that height may be equalized.

Japanese Utility Model Publication No. 5-14091

  However, the multi-tuned lifter 100 has a complicated structure in which the ball nut 110, the ball screw shaft 111, the original shaft side bevel gear 112, the driven side bevel gear 113, and the like are incorporated into the hydraulic jack 102, and thus has a compact design. There was a problem that there was a limit. In addition, the hydraulic jack 102 is difficult to manufacture by changing its size slightly due to its complicated structure. For this reason, there are few types of the same type as the hydraulic jack 102 and different sizes, and the hydraulic jack must be selected from the determined types. As a result, there is a problem that only a lifter of a predetermined size can be designed.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a multi-tuning lifter having a simple structure and a compact design.

In a multi-tuning lifter that includes a plurality of lifters that move up and down while extending and lowering the pantograph while keeping the lift platform parallel to the base, and each of the lift platforms of the lifter moves up and down so that the heights are uniform. A gear rail member provided on the upper surface of the base; a connecting shaft for connecting the pantographs of the lifter in parallel; a gear member provided on the connecting shaft and meshing with each of the gear rail members; Each of the gear members rolls while meshing with each of the gear rail members, so that the connecting shaft moves along the gear rail member, and each of the pantographs is moved by the movement of the connecting shaft. It is characterized by expanding and contracting so that the heights are equal.
The gear rail member is a chain, the gear member is a sprocket, and the connection shaft is moved along with the movement of the connection shaft in order to keep the positional relationship in the height direction between the chain and the sprocket constant. You may provide the guide member which rolls the upper surface of the said base.
The gear rail member may be a rack, and the gear member may be a pinion.

  According to the present invention, the gear rail member provided on the upper surface of the base, the connecting shaft for connecting the pantographs of the lifter in parallel, the gear member provided on the connecting shaft and meshing with each of the gear rail members, When the gear member is rolled while meshing with each of the gear rail members, the connecting shaft moves along the gear rail member. Thereby, since each of a pantograph expands and contracts so that height may be equalized, the lifting platform of each lifter can be raised / lowered so that height may be equalized. Since this multi-tuning type lifter is obtained by adding a connecting shaft, a gear member, and a gear rail member to a conventional lifter, the structure becomes simple and a compact design can be achieved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
The multi-tuned lifter according to the first embodiment will be described by taking as an example a case where it is used as a lift device for a heliport elevator. As shown in FIGS. 1 and 2, the heliport elevator 1 is an elevator that moves up and down between the heliport floor 7 and the lowermost floor 8, and includes a car 2 having a space in which a person gets in and a car 2 therein. And a multi-tuning lifter 3 which is a lifting device for lifting and lowering. 1 and 2 are views of the elevator 1 as viewed from the front. In order to make the configuration of the elevator 1 easier to understand, the description of doors and walls that are actually present on the front is omitted. The multi-tuned lifter 3 is a combination of two pantograph lifters 4 (see FIG. 3) for raising and lowering the lifting platform 20, and the car 2 is provided between the two pantograph lifters 4 and 4. It has been. Each side surface 2b of the car 2 is provided with a plate-like push-up plate 6 having one end connected to the side surface 2b and the other end extending obliquely downward. The other end of each push-up plate 6 is connected to the upper surface of the lifting platform 20 of the pantograph lifter 4. Each of the side surfaces 2b is provided with two vertical columns 5 extending vertically upward, and an upper end 5a of the vertical column 5 projects upward from the car 2.

  As shown in FIG. 1, when the car 2 is located on the lowest floor 8, the entire car 2 is located below the heliport floor 7, so that the floor door 9 has an opening formed in the heliport floor 7. The heliport floor 7 is almost flat. In this state, the bottom surface 2 a of the space inside the car 2 is almost the same height as the lowermost floor 8, so that a person on the lowermost floor 8 can get into the space inside the car 2. Thereafter, the two pantograph lifters 4 and 4 constituting the multi-tuning lifter 3 raise the elevators 20 and 20 so as to make the heights uniform by a mechanism described later. Then, the two raising plates 6 and 6 are pushed upward by the elevators 20 and 20 so that the heights are aligned. Thereby, the cage | basket | car 2 raises, with the bottom face 2a of the space inside the cage | basket | car 2 keeping horizontal. When the car 2 rises, as shown in FIG. 2, the upper ends 5 a of the four vertical columns 5 push up the floor door 9, and the car 2 protrudes above the helipad floor 7. In this state, the bottom surface 2 a of the space inside the car 2 is almost the same height as the heliport floor 7, so that a person riding in the space inside the car 2 can get down to the heliport floor 7.

Next, the structure of the multi-tuning lifter 3 will be described.
As shown in FIG. 3, the multi-tuning lifter 3 is formed by combining two pantograph lifters 4 and 4 in parallel so that the bases 21 overlap when viewed from the side (in the direction of arrow B). It is configured. Each pantograph lifter 4 includes a base 21, a lift 20 parallel to the base 21, and a lifting device 22 that lifts and lowers the lift 20 while keeping the lift 20 parallel to the base 21. . On the upper surface of the base 21, a convex portion 21b is formed along the edge portion, and a concave portion 21a that is recessed with respect to the convex portion 21b is formed so as to be surrounded by the convex portion 21b. Each lifting device 22 includes two pantographs 23 and 23 and a hydraulic jack 24 for expanding and contracting the two pantographs 23 and 23. In order to adjust the hydraulic pressure of the hydraulic jack 24 that each pantograph lifter 4 has, a hydraulic power unit (not shown) is provided.

  Each pantograph 23 is composed of six arms 31 to 36. One end of the arm 31 is rotatably attached to the upper surface of the base 21. The central portion of the arm 32 and the central portion of the arm 31 are supported so as to be rotatable while intersecting with a pin 37, and can be rolled on one end of the arm 32 on the convex portion 21 b on the upper surface of the base 21. A roller 26 is rotatably attached. One end of each of the arms 33 and 34 is rotatably connected to the other end of each of the arms 31 and 32. The central portions of the arms 33 and 34 are rotatably supported while intersecting with pins 38. One end of each of the arms 35 and 36 is rotatably connected to the other end of each of the arms 33 and 34. The central portions of the arms 35 and 36 are rotatably supported while intersecting with pins 39. The other end of the arm 36 is rotatably attached to the lower surface of the lifting platform 20. A roller 27 that can roll on the lower surface of the lifting platform 20 is rotatably attached to the other end of the arm 35. As each of the arms 31 to 36 rotates at the center portion and both end portions thereof, the pantograph 23 can be expanded and contracted in the horizontal direction and the vertical direction, and the width w and height h thereof are changed. .

  Further, the multi-tuned lifter 3 is provided with a connecting shaft 40 that connects the four rollers 26 coaxially. Each of the four rollers 26 is fixed to the connecting shaft 40. When the connecting shaft 40 rotates about its longitudinal direction, each roller 26 rotates. Thereby, each pantograph 23 is connected by the connection shaft 40 via the roller 26 so as to overlap each other when viewed from the arrow B direction, that is, in parallel. The connection shaft 40 is provided with two sprockets 41 and 41 so as to be positioned between the two rollers 26 and 26 provided in each pantograph lifter 4. Each of the recesses 21 a of the base 21 is provided with a tuning chain 42 that extends in a direction perpendicular to the longitudinal direction of the connecting shaft 40 and meshes with the sprocket 41. Here, the sprocket 41 constitutes a gear member, the tuning chain 42 constitutes a gear rail member, and the roller 26 constitutes a guide member for keeping the positional relationship between the tuning chain 42 and the sprocket 41 in the height direction constant. To do.

Next, the operation of the multi-tuning lifter according to Embodiment 1 will be described with reference to FIG.
A hydraulic power unit (not shown) adjusts the hydraulic pressure of the two hydraulic jacks 24, 24, so that each hydraulic jack 24 expands and contracts the two pantographs 23, 23 in the horizontal direction and the vertical direction, respectively. When each pantograph 23 expands and contracts, the roller 26 rolls on the convex portion 21 b on the upper surface of the base 21 and the roller 27 rolls on the lower surface of the lifting platform 20. When the roller 26 rolls on the convex portion 21b, the positional relationship in the height direction between the tuning chain 42 and the sprocket 41 is kept constant. When the roller 26 rolls on the convex portion 21b, the connecting shaft 40 moves in the direction of arrow A while rotating, but each sprocket 41 rolls while meshing with each tuning chain 42 one tooth at a time. The connecting shaft 40 moves in the direction of the arrow A while maintaining the state where the axis is directed in the direction of the arrow B. That is, the connecting shaft 40 moves along the tuning chain 42. As a result, the four rollers 26 move in the direction of the arrow A on the convex portion 21b while maintaining the state where they overlap each other when viewed from the direction of the arrow B. Accordingly, each pantograph 23 expands and contracts in the horizontal direction so as to align the width w, and therefore expands and contracts so as to align the height h in the vertical direction. When the pantographs 23 extend and contract in the vertical direction so as to have the same height h, the lifting platform 20 of each pantograph lifter 4 moves up and down so that the heights thereof are aligned. That is, the lifting platform 20 moves up and down in synchronization.

In this manner, the pantograph 23 is expanded and contracted to include the two pantograph type lifters 4 that move up and down while keeping the lifting platform 20 parallel to the base 21 so that each lifting platform 20 has the same height. In the multi-tuned lifter 3 that moves up and down, the tuning chain 42 provided in the recess 21a on the upper surface of the base 21, the connecting shaft 40 that connects the pantographs 23 in parallel, the connecting shaft 40, and the tuning chain By providing the sprocket 41 that meshes with each of the 42, the sprocket 41 rolls while meshing with each of the tuning chains 42, and the connecting shaft 40 moves along the tuning chain 42. Further, when the roller 26 rolls on the convex portion 21b, the positional relationship in the height direction between the tuning chain 42 and the sprocket 41 is kept constant. As a result, each of the pantographs 23 expands and contracts so as to have the same height, so that the lifting platform 20 of each pantograph lifter 4 can be lifted and lowered so as to have the same height.
Further, the multi-tuning lifter 3 is obtained by adding a connecting shaft 40, a sprocket 41, and a tuning chain 42 to the conventional pantograph lifter 4, so that a ball nut, a ball screw shaft, and an original shaft side umbrella are provided. Compared to a lifter equipped with a complicated hydraulic jack having gears, driven bevel gears, etc., the structure is simple and a compact design can be achieved.

Embodiment 2. FIG.
Next, a multi-tuning lifter according to Embodiment 2 of the present invention will be described with reference to FIG. In the second embodiment, the same reference numerals as those in FIG. 3 are the same or similar components, and detailed description thereof is omitted.
The multiple-tuned lifter according to Embodiment 2 of the present invention is different from Embodiment 1 in that instead of the sprocket 41, a roller 26 is used as a pinion and a rack with which the pinion engages with the convex portion 21b is provided. is there.
As shown in FIG. 4, the multi-tuning lifter 50 is formed by combining two pantograph lifters 51 and 51 in parallel so that the bases 21 overlap each other when viewed from the side (in the direction of arrow B). It is configured. The pan tag lug 23 of each pantograph lifter 51 is composed of six arms 31 to 36, and a pinion 52 is rotatably attached to one end of the arm 31. The four pinions 52 are connected coaxially by a connecting shaft 53. The four pinions 52 are respectively fixed to the connection shaft 53, and each of the pinions 52 is rotated when the connection shaft 53 rotates about its longitudinal direction. The convex portion 21 b is provided with a rack 54 that extends perpendicularly to the connection shaft 53 and meshes with the pinion 52. Other configurations are the same as those in the first embodiment. Here, the pinion 52 constitutes a gear member, and the rack 54 constitutes a gear rail member.

Next, the operation of the multi-tuning lifter according to the second embodiment will be described with reference to FIG.
A hydraulic power unit (not shown) adjusts the hydraulic pressure of the hydraulic jack 24 so that the hydraulic jack 24 expands and contracts the pantograph 23 in the horizontal direction and the vertical direction. When each pantograph 23 expands and contracts, the pinion 52 rolls while meshing with the rack 54 one tooth at a time, so that the connecting shaft 53 moves in the direction of the arrow A while maintaining the state where the axis is directed in the direction of the arrow B. To do. That is, the connecting shaft 53 moves along the rack 54. As a result, the four pinions 52 each roll in the direction of the arrow A while meshing with the rack 54 one by one while maintaining a state where they overlap each other when viewed from the direction of the arrow B. Accordingly, each pantograph 23 expands and contracts in the horizontal direction so as to align the width w, and therefore expands and contracts so as to align the height h in the vertical direction. When each pantograph 23 expands and contracts in the vertical direction so as to have the same height h, the lifting platform 20 of each pantograph lifter 51 moves up and down so that the heights are aligned. That is, the lifting platform 20 moves up and down in synchronization.

As described above, the pantograph 23 is expanded and contracted to include the two pantograph type lifters 51 that move up and down while keeping the lifting platform 20 parallel to the base 21 so that each lifting platform 20 has the same height. In the multiple tuned lifter 50 that moves up and down, the rack 54 provided on the convex portion 21 b on the upper surface of the base 21, the connecting shaft 53 that connects the pantographs 23 in parallel, and the rack 54 provided on the connecting shaft 53. By providing the pinions 52 that mesh with each of the racks 54, the pinions 52 roll while meshing with each of the racks 54, and the connecting shaft 53 moves along the rack 54. As a result, each of the pantographs 23 expands and contracts so as to have the same height, so that the lifting platform 20 of each pantograph lifter 4 can be lifted and lowered so as to have the same height.
Further, the multi-tuning lifter 50 is obtained by replacing the conventional pantograph lifter 51 with a roller that rolls on the upper surface of the base 21 in place of the pinion 52 and further adding a rack 54 and a connecting shaft 53. Therefore, the structure is simpler and a more compact design can be achieved as compared with a lifter having a complicated hydraulic jack having a ball nut, a ball screw shaft, an original shaft side bevel gear, a driven side bevel gear, and the like.

In the first and second embodiments, the case where the multi-tuning lifter is used as an elevator lifting device for a heliport has been described as an example, but the present invention is not limited to this. As long as the lifting platform of the plurality of pantograph lifters is lifted up and down with the same height, the lifting platform may be used for any purpose.
In Embodiments 1 and 2, two pantograph lifters are combined, but the number is not limited to two. It is also possible to combine three or more pantograph lifters by a similar mechanism.

It is a front view of the elevator for heliports when the multi-tuning type lifter according to Embodiment 1 of the present invention is used as a lifting device. It is a front view of another state of the elevator for heliports when the multi-tuning type lifter according to Embodiment 1 is used as a lifting device. 1 is a perspective view of a multi-tuning lifter according to Embodiment 1. FIG. 6 is a perspective view of a multi-tuning lifter according to Embodiment 2. FIG. It is a perspective view of the conventional multi-tuning type lifter. In the conventional multiple tuned type lifter, it is a block diagram of the hydraulic jack which raises / lowers each lifter.

Explanation of symbols

  3,50 Multiple tuned lifter, 4,51 Pantograph lifter (lifter), 20 Lifting platform, 21 Base, 21a Recessed portion (upper surface), 21b Convex portion (upper surface), 23 Pantograph, 26 Roller (guide member), 40 , 53 connecting shaft, 41 sprocket (gear member), 42 tuning chain (gear rail member), 52 pinion (gear member), 54 rack (gear rail member).

Claims (3)

In a multi-tuning lifter that includes a plurality of lifters that move up and down while extending and lowering the pantograph while keeping the lift platform parallel to the base, and each of the lift platforms of the lifter moves up and down so that the heights are uniform. ,
Gear rail members respectively provided on the upper surface of the base;
A connecting shaft for connecting the pantographs of each of the lifters in parallel;
A gear member provided on the coupling shaft and meshing with each of the gear rail members;
Each of the gear members rolls while meshing with each of the gear rail members, so that the connecting shaft moves along the gear rail member,
A multi-tuning lifter characterized in that each of the pantographs expands and contracts so as to have a uniform height by the movement of the connecting shaft. The gear rail member is a chain;
The gear member is a sprocket;
The connection shaft includes a guide member that rolls on the upper surface of the base as the connection shaft moves in order to maintain a constant positional relationship in the height direction between the chain and the sprocket. The multi-tuned lifter according to claim 1. The gear rail member is a rack;
The multi-tuned lifter according to claim 1, wherein the gear member is a pinion.

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