JP2017132566A - Opening/closing device for carrier door in elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open/close, in a carrier door of vertically opening/closing type, the exit/entrance of a carrier without lowering the door below the floor of the door and to lower the carrier to a position where the floor of the carrier is in contact with the base surface of an elevator installation place or where the floor is closest to the base surface.SOLUTION: In an elevator including a carrier 15 that is lifted/lowered along a guide rail, a device for opening/closing a door for providing the carrier for an entrance/exit comprises: at least one motor 37 installed in the upper part of the carrier; and a transmission mechanism 25 composed of a drive gear using the motor as a power source, a follower gear provided on the carrier side near to the lower part of the closed door, and a chain wound around the drive gear and the follower gear. In a closed position of the door, the lower part of the door is lowered near to the floor of the carrier. In an open position, the door is lifted above the carrier so as to open the entrance/exit 30.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to an apparatus for opening and closing a door provided at an entrance of a transporter by a lift operation in an elevator having a transporter that moves up and down along a guide rail.

  There are various types of elevators used in the construction industry (building industry, civil engineering industry, etc.), and they are widely used as construction elevators. Construction elevators are mainly divided into those for long span construction and those other than long span construction, and are further divided into less than 1 t, less than 1 t, less than 2 t, and more than 2 t, depending on the load. According to the “Crane Yearbook” 2012 edition published by the Japan Crane Association, the number of elevators installed in Japan is 47 for long-span 2t or more and 49 for 1 to 2t. And less than 1t occupies an overwhelming number of 3707 units.

  The construction elevator has a form as shown in FIG. 9, for example, and the illustrated elevator is a double structure having a carrier c between two guide posts a and b. The carrier c has a truss-structured floor d, motors e and f are installed as driving devices under the floor, and pinions (not shown) provided on them and rack rails g and h provided on the guide posts a and b. It goes up and down by meshing. The carrier c has a door composed of an upper door j and a lower door k, and the upper door j and the lower door k move upward and downward to open and close the doorway (see the two-dot chain line).

  In the conventional construction elevator, the height L of the floor when the carrier is lowered most is about 1.2 m from the base plane p of the elevator installation location. Here, the “base plane” corresponds to the floor or ground of a lifting yard on the first floor where an elevator is installed. Furthermore, the state where the carrier is lowered to the lowest position is referred to as “landing” in the industry. Therefore, the above 1.2 m is the height when the conventional carrier c is landed.

  In addition, there are two types of door opening / closing methods: top / bottom opening / closing type and left / right opening / closing type. It is advantageous. On the other hand, in order to carry materials to the floor of a carrier with a height of about 1.2m, a large temporary stage with a slope is required, and there is little chance of securing that much space around the elevator installation location. Absent. However, this problem is not limited to the vertical opening / closing type and the left / right opening / closing type, but may occur as long as the floor of the carrier is high.

  In recent years, crane safety regulations and elevator structure standards have been revised, and the structure of the carrier has been reviewed, and attempts have been made to bring the height of the carrier at the time of landing close to the base surface of the elevator installation site. However, if the landing height is lowered, it becomes impossible to take a method of moving the door of the transporter downward to open and close it, so it is necessary to take some measures. The prior art has been investigated in this regard, but in the case of the up-and-down open / close type, a part of the door is moved downward to open, and no other examples can be found.

  For example, Japanese Patent Application Laid-Open No. 7-89683 is an invention related to an elevator for high-rise building construction, but the upper door constituting the door is raised and the lower door is lowered. Also, in the case of the invention of Japanese Patent Application Laid-Open No. 2013-95581 relating to a transporter for an elevator apparatus, the car upper door moves upward from the position where it covers the upper part of the opening, and the car lower door moves downward from the position where it covers the lower part of the opening It is the structure of moving to. Thus, it can be said that in the conventional up-and-down opening and closing type, a form in which the lower door is lowered from the floor of the transporter is generally used to open and close the entrance of the transporter.

JP-A-7-89683 JP 2013-95581 A

  This invention is made | formed in view of the said point, The subject is enabling it to open and close the entrance / exit of a portable device, without lowering a door from the floor of a portable device in a vertically movable door. Another object of the present invention is to enable the carrier to be lowered to a position where the floor of the carrier is in contact with the base surface of the elevator installation site or as close as possible to the base surface.

  In order to solve the above-described problems, the present invention provides an elevator equipped with a transporter that moves up and down along a guide rail. And a drive gear using the motor as a power source, a driven gear provided on the side of the carrier near the bottom of the closed door, a transmission mechanism comprising a chain wound around the drive gear and the driven gear, At the door closing position, the lower part of the door is lowered near the floor of the carrier, and at the door opening position, the door is raised above the carrier so as to open the doorway.

  In the above, it is assumed that there is only one door that opens and closes the entrance / exit of the transporter, and it is also assumed that there are two or more doors. In either case, by providing the driven gear near the lower part of the closed door, the lower part of the door descends near the floor of the carrier when the door is closed, and the doorway is opened when the door is open. So that the door rises.

  On the other hand, the door opens and closes the doorway of the transporter by a door member divided into a plurality of upper and lower parts, and the lower door, which is the lowest door member, is driven by the transmission mechanism to move up and down, and the upper door member The upper door member and the engaging portion provided at a part of the lower door are engaged with each other when the lower door is raised and lowered, and forcedly moved thereby. It is desirable to be able to move up and down. This form corresponds to a case where the door is composed of two or more door members. If there are two door members, the height protruding above the carrier will be halved when the doorway is fully open, and if it is three, it will be one third.

  Further, in the present invention, the transmission mechanism is provided coaxially with the door motor, and the two drive gears that rotate in the same direction, and the left and right provided at the lower side of the door at the closed position of the door. Driven gear, left and right intermediate gears located on the upper left and right of the door between the driving gear and the driven gear, one end coupled to the lower left side of the door, and the left driven gear and the intermediate gear into one driving gear A left chain that connects the other end to the lower left side of the door through the left intermediate gear, and an end that is connected to the lower right side of the door, and a single driven gear and intermediate gear through the right driven gear and the intermediate gear. It is desirable that the right chain be connected to the lower right side of the door through the right intermediate gear.

  With the above-described configuration, the carrier door can be opened and closed reliably and safely while balancing the left and right. The chain does not sag due to the chain hanging, and the door does not tilt when the door is opened and closed, and the upper door is forcibly taken up by the rise of the lower door, so even if the upper door is not driven The doorway can be opened smoothly.

  Furthermore, the elevator shall be composed of a plate-like structure in which the floor of the carrier is substantially flat and the transmission mechanism is installed above the floor, so that the floor is in contact with the base surface of the elevator installation location, or It is desirable to be able to descend to a position as close as possible to the base surface. With this configuration, the transporter can be brought into contact with the base surface of the elevator installation location or lowered to a position equivalent thereto, and a true “landing” is realized.

  Since the present invention is configured and operates as described above, in the vertically openable / closable transporter door, it is possible to open and close the doorway of the transporter without lowering the door from the floor of the transporter. Play. Further, according to the present invention, since the carrier can be lowered to a position where the floor of the carrier is in contact with the base surface of the elevator installation place or as close as possible to the base surface, a large temporary stage with a slope is required. It is possible to easily and safely carry materials to the floor of the carrier without having to do so.

It is a front view which shows an example of the opening / closing apparatus of the carrier door in the elevator which concerns on this invention, and shows the state which the door of the carrier fell and the doorway was closed completely. It is a front view which shows the state which the lower door of the carrying machine rose and the doorway was opened about half in the apparatus same as the above. It is explanatory drawing which shows the state by which all the doors of the carrier were raised in the apparatus same as the above, and the doorway was opened completely. It is a front view which shows an example of the transmission mechanism for the door opening and closing in an apparatus same as the above. It is related with the principal part of an apparatus same as the above, A is an enlarged view of the left side of a transmission mechanism, B is a left view with respect to A figure. Similarly, it relates to the main part of the apparatus, A is an enlarged view on the right side of the transmission mechanism, and B is a right side view with respect to FIG. Similarly, A is an enlarged view of the lower left front, B is a left side view of FIG. A, C is an enlarged view of the lower right of the front, and D is a right side view of the C view. Similarly, A is a side view of the drive gear, B is a sectional view taken along line VIIIB-VIIIB in FIG. 5A, and C is a sectional view taken along line VIIIC-VIIIC in FIG. 6A. It is a front view which shows the example of the conventional construction elevator.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 shows a construction elevator to which an opening / closing device for a carrier door according to the present invention is applied. In the case of this embodiment, it is intended for an elevator for long span construction with a loading load of less than 1 t, and it is assumed that 200 V (50 Hz) / 220 V (60 Hz) is boosted or used as the power source. This is not a limitation.

  The thing of embodiment has the left-right paired guide post 11 and 12 installed in the base surface 10 of an elevator installation place, and the portable device 15 is arrange | positioned so that raising / lowering is possible among them. Therefore, as apparent from FIG. 1 and the description, it belongs to the two-structure elevator. However, the present invention is not limited to this, and can also be implemented as a single structure having a configuration in which one guide post is installed in the center of the transporter 15.

  The carrier 15 has a floor 16 made of a substantially flat plate-like structure, and has a substantially U-shaped front shape with vertical frames 13 and 14 on the left and right sides thereof. Motors 17 and 18 are installed in left and right vertical frames 13 and 14 as drive device 20 of transporter 15, respectively, and a pinion (not shown) provided on motors 17 and 18 and a rack provided on guide posts 11 and 12. Power is transmitted by the meshing of the rails 19 and 21, and the transporter 15 is configured to move up and down. In the illustrated case, the motors 17 and 18 are provided on the left and right vertical frames 13 and 14.

  The floor 16 of the transporter 15 stops the truss structure where the vertical height (thickness) increases, for example, a flat frame is formed by combining H-shaped steel, and a plate material such as a thin steel plate is attached to the frame. It is a flat plate-like structure with a minimum height (thickness). For this reason, in the state where the transporter 15 is lowered to the lowest position, the height from the base surface of the elevator installation location to the floor 16 is about 100 mm to 200 mm. Therefore, since the so-called floor height can be made very low, even when a temporary stage is used for loading materials or the like, a very small and simple one is sufficient.

  The transporter 15 is equipped with a door 24 including an upper door 22 and a lower door 23 in order to open and close the entrance to the floor 16. The door 24 of the embodiment has a configuration of two upper and lower parts, and only the lower door 23 is driven upward by a transmission mechanism 25 described later. The upper door 22 is forcibly taken upward by an engaging means with a lower door 23 described later, and has a configuration that opens the entrance 30 (see FIGS. 2 and 3). Since only the lower door 23 is driven, the upper door 22 moves together with the lower door 23 even when lowered, but stops at a fixed position, and thereafter, only the lower door 23 descends to close the entrance / exit. .

  The above-described transmission mechanism 25 includes a sprocket wheel and a chain, and a door motor 37 is provided on the upper frame of the transporter 15 as a driving device. The door motor 37 is provided with two drive gears 26 and 27 that rotate in the same direction coaxially as sprocket wheels. The left and right driven gears 28 and 29 provided on the left and right of the lower part of the carrier 15, the drive gear 26, Left and right intermediate gears 31, 32, 33, and 34 are located on the left and right of the upper portion of the door 24 between 27 and the driven gears 28 and 29 (FIG. 4). The two chains are wound around these gears as follows.

  The chain has one end 35a coupled to the lower left side of the door 24, is wound around a single drive gear 26 via a left driven gear 28 and an intermediate gear 31, and the other end 35b is coupled to the door via a left intermediate gear 32. The left chain 35 is connected to the lower left side of the left side. Also, one end 36a is coupled to the lower right side of the door, is hung around one drive gear 27 via the right driven gear 29 and the intermediate gear 34, and the other end 36b is connected to the lower right side of the door via the right intermediate gear 33. It has a right chain 36 that joins. The door to be driven is the lower door 23 as described above.

  In this embodiment, the upper door member 22 is arranged so as to be displaced forward and backward with respect to the lower door 23. An engaging portion 39 is provided at the lower portion of the lower door 23 as an engaging means for the upper door 22 and the lower door 23 that are arranged in a shifted manner. The lower side of the door 22 is used (see FIGS. 5 and 6). The engaging portion 38 has a purpose of placing and lifting the upper door 22 by engaging with the engaging counterpart portion 39 so that the upper door 22 shifted forward protrudes forward by a length to be engaged. A pair of left and right is provided on the lower door 23 disposed on the rear side.

  7 and FIG. 8 show the coupling of the lower door 23 to the left and right chains 35 and 36 in order to distribute the left and right by the drive gears 26 and 27 rotating in the same direction in the same direction. Details of the method are shown. Here, the left chain 35 has one end 35a of the inner chain coupled to the coupling portion 41 of the lower door 23, and the right chain 36 has one end 36b of the outer chain coupled to the coupling portion 42 of the lower door 23. (See FIGS. 7A and C).

  Furthermore, a means for detecting the height positions of the upper door 22 and the lower door 23 in the closed state and the open state is provided (see FIG. 5). This position detection means is composed of, for example, upper and lower position detectors 43 and 44 such as limit switches attached to the carrier 15 and positioning portions 45 and 46 which are door-side portions for switching the detectors 43 and 44. Is done. In FIG. 5 in which the lower door 23 closes the entrance / exit 30, the upper detector 43 is in an off state and the lower detector 44 is in an on state.

  The upper position detector 43 is attached to the upper frame of the transporter, and is switched by engaging with a positioning portion 45 at the lower portion of the lower door 23 (which may be the upper door 22) rising (in the illustrated case, the coupling portion 41). Also serves as the positioning portion 45). The lower detector 44 is attached to the floor portion of the transporter 15 and is switched by engaging with a positioning portion 46 in the lower door 23 that descends. The result of switching is transmitted to the control panel 48 described later. Therefore, it is possible to detect whether the door 24 is fully open or fully closed. The illustrated example is schematic, and the specific configuration and position of the position determination means can be changed.

  In the illustrated embodiment, the left chain 35 rotates from the one end 35 a to the outside of the driven gear 28 and is coupled to the coupling portion 41, and the right chain 36 wraps from the one end 36 a to the inside of the driven gear 29 to the coupling portion 42. Are connected. That is, since the chain 35 and 36 are reversed inward and outward, the through-hole 47 of the chain 36 is provided in the right or left coupling portion 42 in the illustrated case (see FIG. 8C). Reference numeral 48 in the figure denotes an elevator control panel, and 49 denotes a drop-preventing handrail provided on the upper part of the transporter.

  In such a door opening / closing device, the lower part of the door 24 is lowered near the floor of the carrier 15 at the closed position of the door 24, and the door 30 is moved upward to open the entrance 30 at the opened position of the door 24. The door 24 does not move below the floor of the transporter 15. In other words, since the door 24 is configured to move only above the transporter 15, the door 24 always protrudes upward when the door 24 is opened, and has nothing to do with the lower part of the transporter 15. Further, the protruding amount in the door open state is reduced by dividing the door 24 into a plurality of upper and lower door members.

  The opening / closing of the door can be grasped by the above-described position detecting means, and the detection result is displayed on the control panel 48, for example, so that it is accurately grasped whether the door is completely closed or completely opened. Furthermore, it is possible to grasp the state between fully closed and fully opened by adding position detecting means as necessary. Further, since only the lower door 23 is driven, the position of the lower door 23 is grasped, so that it can be determined whether the entire door is in the fully closed / open / closed state or the fully open state, and a relatively simple configuration is sufficient.

  According to the present invention, the so-called landing state of the transporter 15 can be set extremely low, and in particular, it can be lowered to a position that is in contact with or close to the base surface of the elevator installation place. Therefore, since a large temporary stage is not required to carry materials to the floor 16 of the carrier, work such as loading and unloading of materials is extremely possible even if a large space cannot be secured around the elevator installation location. It can be done easily and safely.

DESCRIPTION OF SYMBOLS 10 Base surface 11, 12 Guide post 13, 14 Vertical frame 15 Carrier 16 (Carrier's) floor 17, 18 Motor 19, 21 Rack rail 20 Drive device 22 Upper door, 23 Lower door 24 Door 25 Transmission mechanism 26, 27 Drive gear 28, 29 Driven gear 30 Entrance / exit 31 to transporter 31, 32, 33, 34 Intermediate gear 35, 36 Chain 37 Door motor 38 Engagement part, 39 Engagement part 41, 42 Coupling part 43, 44 Detector 45, 46 Positioning part 47 Chain through-hole 48 Control panel 49 Handrail for fall prevention

Claims (4)

In an elevator equipped with a carrier that moves up and down along a guide rail, it is a device for opening and closing the doorway of the carrier by raising and lowering the door,
At least one motor installed at the top of the carrier;
A drive gear using the motor as a power source, a driven gear provided on the side of the carrier near the lower part of the closed door, a transmission mechanism comprising the drive gear and a chain wound around the driven gear, and a closed position of the door Then, the lower part of the door is lowered near the floor of the carrier, and the door is raised above the carrier so that the door opens at the door opening position. The door opens and closes the doorway of the transporter with a door member divided into a plurality of upper and lower parts,
The lower door, which is the lowermost door member, is driven by the transmission mechanism to move up and down, and the upper door member is arranged so as to be displaced forward and backward with respect to the lower door. 2. The opening / closing device for a car door in an elevator according to claim 1, wherein the engaging portion provided in the portion and the upper door member engage with each other and are forcibly moved up and down. The transmission mechanism is provided coaxially to the door motor and rotates in the same direction, and the left and right driven gears provided on the left and right sides of the lower side of the door when the door is closed, Left and right intermediate gears located on the upper left and right sides of the door between the drive gear and the driven gear, one end is coupled to the lower left side of the door, passed through the left driven gear and the intermediate gear, and hung around one drive gear, Left chain connecting the other end to the lower left side of the door via an intermediate gear, one end connected to the lower right side of the door, hung around one drive gear via the right driven gear and the intermediate gear, 3. The opening / closing device for a car door in an elevator according to claim 1, further comprising a right chain that connects the other end to the lower right side of the door via a gear. The elevator is composed of a plate-shaped structure with a substantially flat floor, and the transmission mechanism is installed above the floor, so that the floor touches the base surface of the elevator installation site or 4. The opening / closing device for a carrier door in an elevator according to claim 1, wherein the opening / closing device is configured to be able to descend to a position as close as possible.

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