JP4456203B2 - Movable floor device with foldable hatch and elevating handrail - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a movable floor covering.StandingMore particularly, the present invention relates to a lift device provided with this movable floor device on each floor, and more particularly to a movable floor device and the like for lifting a heavy object and bringing it into the upper floor in a power plant or factory.
[0002]
[Prior art]
In power plants and factories, lift devices or towers are sometimes attached to carry large equipment that cannot be loaded into ordinary elevators to the upper floor. In such a lift device, through openings are formed in the floor or ceiling of each floor, and a large apparatus is lifted through these through openings. However, usually, the lift device does not carry in or out the cargo, and the through openings on each floor are closed by three or more concrete hatches independent of each other. That is, the floor of each floor is a movable floor. When this lift device is used, a scaffold is assembled for each floor, a chain block is installed, and a plurality of hatches are lifted one by one by this chain block to open the openings. Moreover, it is obliged to attach a handrail around an opening for safety measures. The weight per piece of the hatch usually reaches 3 to 5 tons to give it sufficient strength.
[0003]
[Problems to be solved by the invention]
As described above, according to the conventional lift device and the movable floor, there is a problem that it takes a lot of labor to remove the hatch. Moreover, it is necessary to attach a handrail around an opening for safety measures at every use, and it is necessary to remove this handrail after use. That is, according to the conventional lift device and the movable floor, additional work necessary for using the lift device and the movable floor is troublesome.
[0004]
  An object of the present invention is to provide a movable floor device capable of opening and closing an opening safely and easily.TheFurthermore, it is providing the lift apparatus containing this movable floor apparatus.
[0005]
[Means for Solving the Problems]
  In the first aspect, the present invention provides:An opening formed in the floor or ceiling;A hatch member that is pivotally attached to the housing around the opening and opens and closes the opening, one end of which is connected to the rear side of the hatch member so as to be substantially hidden behind or below the hatch member, and the other end to the housing around the opening. And a first drive system that opens and closes the hatch member, and extends along the rotation surface of the hatch member in the vicinity of the inner wall of the opening, and is opened to be received behind or below the closed hatch member. A first handrail member attached to the surrounding housing and lifted and lowered in the opened opening to partition the opening; a raised first handrail member; an opened hatch member; and a housing around the opening A second drive system that is attached to a housing around the opening and that lifts and lowers the first handrail member so as to be substantially hidden below at least one of them.The hatch members are a pair of hatch members that are pivoted or folded in opposite directions to open one opening, and both are closed or unfolded to fully close the one opening. The one handrail member is a pair of the first handrail members provided on the back side or the lower side of the pair of hatch members, respectively, and is connected to the front end portions of the pair of hatch members so as to cross the opening. A pair of second handrail members extending respectively, and when the opening is fully opened, the pair of hatch members are both opened or folded, and the pair of first handrail members are both When the opening is half-opened, one of the hatch members is opened or folded, and one of the first members located behind or below the one hatch member is opened. Sliding member is raised further, concatenated other of the second handrail member is raised to the other of the hatch memberA movable floor apparatus is provided.
[0006]
  The present inventionPreferablyA hatch member that includes a plurality of hatches connected to each other so as to be foldable, is pivotally attached to a housing around the opening, is unfolded to close the opening, and is folded to open the opening; A first drive system having one end connected to the rear side of the plurality of hatches and the other end connected to a housing around the opening so that the hatch member is expanded and folded, and close to the inner wall of the opening. It extends along the folding direction of the hatch member and is attached to the housing around the opening so as to be accommodated behind or below the expanded hatch member, and the hatch member is folded up and down in the opened opening The first handrail member that is raised and partitions the opening, the first handrail member that is raised, the folded hatch member, and the casing around the opening are opened so as to be substantially hidden below. Attached to the periphery of the skeleton, to provide a movable floor apparatus having a second drive system for raising and lowering the first handrail member.
[0007]
  According to these movable floor devices, when the opening is opened, the hatch member is rotated or folded by the first drive system and brought close to the peripheral edge of the opening. Then, the first handrail member is raised by the second drive system through the opening opened by turning or folding the hatch member. According to these movable floor devices, the opening and closing of the hatch is performed without the hatch completely separating by the rotation, folding and unfolding of the hatch member. Therefore, unlike the prior art, it is not necessary to lift and suspend a large number of hatches, so that the opening and closing can be performed safely and easily. The first handrail member that appears when the opening is opened allows the floor surface on which the opening is formed to be used to the maximum extent when the opening is closed, and the fall into the opening is prevented when the opening is opened. Is improved. Furthermore, since the movable floor apparatus according to the present invention can be attached with almost no modification of the frame around the opening (reinforcing bars are stretched to increase the strength), there is no significant modification of the frame in accordance with laws and regulations. It is suitably used in unacceptable factories and power plants.In addition, when a pair of hatch members (rotating hatch or folding hatch) are arranged opposite to each other across the opening and the opening is half-opened, one hatch member is rotated or folded, and the other The hatch member is developed, and the second handrail member connected to the other hatch member is raised.
[0008]
In addition, the first handrail member is provided close to the inner wall of the opening, the first drive system is arranged so as to be always hidden behind or below the hatch member, and the second drive system is the first handrail member. By being arranged so as to be hidden by the ascending portion, the effective area of the opening is increased, and the allowable size of the load conveyed through the opening is increased.
[0009]
The other viewpoints and features of the present invention are as described in the respective claims, and duplication of the description is omitted with reference thereto. Thus, each feature of each claim is considered to be described herein.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described.
[0011]
In a preferred embodiment of the movable floor apparatus of the present invention, the movable floor apparatus has a hatch member that is pivotally attached to a housing around the opening and opens and closes the opening.
[0012]
In a preferred embodiment of the movable floor apparatus of the present invention, the movable floor apparatus includes a plurality of hatches that are foldably connected to each other. The movable floor apparatus is pivotally attached to a housing around the opening and deployed to close the opening and be folded. And a hatch member that opens the opening. The movable floor device having this configuration is suitably applied when the opening area is large and the ceiling is low, and the load related to the first drive system can be reduced. In such a movable floor device, preferably, a rotating part or a sliding part such as a roller is provided in the hatch on the front end side of the plurality of hatches, and the rotating part or the sliding part is provided on a step formed on a housing, for example, an inner wall of the opening. A guide mechanism is provided.
[0013]
In the preferred embodiment of the movable floor apparatus of the present invention, the first and second drive systems are remotely operated, so that the unfolding and folding of the hatch and the raising and lowering of the first handrail member are fully automated, and the opening Can be opened and closed more safely and easily.
[0014]
In a preferred embodiment of the movable floor apparatus according to the present invention, a pair of hatch members (a rotary hatch or a folding hatch) are arranged to face each other across an opening, and are orthogonal to the facing direction of the pair of hatch members. Two pairs of first handrail members facing each other are provided. According to this aspect, when the opening is fully opened, the inside and outside of the opening can be partitioned or surrounded over the entire circumference by the pair of the hatch members and the two pairs of the first handrail members that are rotated or folded.
[0015]
In a preferred embodiment of the movable floor device of the present invention, a pair of hatch members (rotating hatch or folding hatch) are arranged to face each other across the opening, and when the opening is half-opened, The hatch member is rotated or folded, the other hatch member is expanded, and the second handrail member connected to the other hatch member is raised.
[0016]
In a preferred embodiment of the movable floor device of the present invention, the first drive system includes a cylinder driven by a gear mechanism or hydraulic pressure, and the second drive system uses a pulley, a wire, a chain, and the like. Constructed from a pulley mechanism.
[0017]
In the preferred embodiment, the movable floor apparatus of the present invention is attached to each opening formed in each floor of the lift tower.
[0018]
In the preferred embodiment, the movable floor apparatus of the present invention can be applied to the opening on which the above-described conventional hatch is placed, with almost no modification of the casing around the opening. Preferably, the hatch member according to the present invention is pivotally attached to the opening inner wall step portion on which the conventional hatch is placed. Preferably, an attachment jig for attaching the hatch member or the like to the housing is attached to the stepped portion.
[0019]
In a preferred embodiment, the liftable handrail of the present invention is deployed in a closed state with respect to a casing around the opening that is opened and closed by the folding and folding of the folding hatch (directly or indirectly). The folding hatch is accommodated behind or below the folding hatch, and the folding hatch is raised in the opened state to partition the opening, thereby preventing an operator or the like from falling into the opening.
[0020]
【Example】
In order to further clarify the preferred embodiment of the present invention described above, an embodiment of the present invention will be described below with reference to the drawings.
[0021]
[Lift device]
FIG. 1 is an overall view of a lift device according to an embodiment of the present invention. Referring to FIG. 1, a lift device (tower) according to an embodiment of the present invention has an opening formed on the floor or ceiling of each floor, and a folding for opening and closing the opening around a housing 62 around the opening. A movable floor device including a type hatch 1 and an elevating handrail 2 for ensuring work safety is installed. A large block or a chain block 61 for lifting a load is attached to the ceiling of the top floor.
[0022]
Moreover, in the lift apparatus shown in FIG. 1, according to the magnitude | size of the opening of each floor, a pair of folding hatches 1 are attached to the left and right sides or one side. In addition, the folding hatch 1 according to the present invention can be attached to one side, and other types of hatches, for example, a rotating single hatch can be attached to the other side.
[0023]
[Foldable hatch (hatch member)]
Next, first, the folding hatch (hatch member) 1 of the movable floor apparatus shown in FIG. 1 will be described in detail, taking as an example the case where a pair of folding hatches 1 are attached to the left and right sides of the opening. . FIG. 2 is a diagram of a movable floor device according to an embodiment of the present invention applied to the lift device shown in FIG. 1 as viewed from the front, in which the left side is a cross-sectional view near the center, and the right side Is a front view. FIG. 3 is a partially broken plan view of the movable floor apparatus shown in FIG. 2, in which the hatch surface on the left side is removed. 2 and 3, the pair of folding hatches 1 are attached to the housings 62 on the left and right sides of the opening so as to face each other. The two sets of folding hatches 1 are folded in opposite directions to open the opening, and both are unfolded to fully close the opening.
[0024]
Each foldable hatch 1 includes a proximal-side hatch 3a and a distal-side hatch 3b that are unfolded and fitted together with a stepped portion 63 formed circumferentially on the inner wall of the opening, and includes one end of the proximal-side hatch 3a. Is pivotally mounted on a step 63 formed on the inner wall of the opening via a base 64. And the tubular rib 6 is arrange | positioned by the back side of the base end side hatch 3a, and the tubular ribs 7a and 7b are arrange | positioned by the back side of the front end side hatch 3b. Since the rib 6 and the ribs 7a and 7b are connected to each other via the pin 8, the proximal-side hatch 3a and the distal-side hatch 3b are pivotably supported to each other.
[0025]
  Furthermore, the tip of the tip side hatch 3b located on the left in FIG.flap(Raised board)30 on the tip of the tip hatch 3b located on the right side of the figure.flap(Raised board)Each 31 is pivotally supported relative to the hatch body. thisflap(Raised board)30 and 31 rotate upward so as to be lifted as the handrails 11c and 12c (see FIG. 6) at the center portion described later rise, and allow the handrails 11c and 12c at the center portion to rise.
[0026]
[Mounting jig]
Here, a fixed portion of the movable floor device, that is, a member for attaching the folding hatch 1 to the casing 62 around the opening, that is, the attachment jig 4 will be described.
[0027]
Referring to FIG. 2, the mounting jig 4 includes a first horizontal beam 4a, a vertical beam 4b connected to the first horizontal beam 4a, an oblique beam 4c connected to the vertical beam 4b, and a vertical beam. A second horizontal beam 4d connected to 4b. The side surface of the first horizontal beam 4a and the side surface of the vertical beam 4b are each supported by the inner wall of the opening, and the tip of the skew beam 4c is supported by the ceiling surface of the lower floor. Cylinders 5 and 5 for driving the folding hatch 1 are attached to the second horizontal beam 4d (see FIG. 4).
[0028]
[Folding hatch drive system (first drive system)]
Next, the drive system (first drive system) of the folding hatch will be described in detail. FIG. 4 is a side view of the movable floor device shown in FIG. 2 and 4, a cylinder driving motor 9 attached to the housing 62 via the second horizontal beam 4d is disposed at the center of the end of the opening. The output shaft of the cylinder driving motor 9 is connected to a speed reducer 10 that converts the direction of the rotational driving force and decelerates it. Moreover, the cylinder 5 attached to the attachment jig | tool 4 is each arrange | positioned at both sides of an opening edge part. The output shaft of the speed reducer 10 is connected to the cylinders 5 and 5 via couplings and rods, and transmits a driving force for causing the piston rods 5b and 5b to stroke.
[0029]
In each cylinder 5, the base end of the cylinder housing 5a is pivotally supported with respect to the mounting jig 4, and the tip of the piston rod 5b is pivotally supported on the lower surface of the base end side hatch 3a. As a result, each cylinder 5 is swingably connected between the folding hatch 1 and the casing 62 around the opening, and the proximal and distal hatches 3a and 3b are moved by the downward stroke of the piston rod 5b. Unfolds to close the opening and is folded by an upward stroke to open the opening. Further, the cylinder 5, the cylinder driving motor 9 and the like are substantially hidden behind or below the folding hatch 1 not only when the folding hatch 1 is unfolded but also when folded. This increases the effective opening area.
[0030]
FIG. 5 is a partial operation diagram of the movable floor apparatus shown in FIG. Referring to FIG. 5, chain 50 for connecting both hatches 3a and 3b is attached to proximal hatch 3a so as to maintain the proximal and distal hatches 3a and 3b when folded. Yes.
[0031]
[Elevating handrail]
Next, the elevating handrail of the movable floor apparatus shown in FIGS. 1 and 2 will be described in detail. FIG. 6 is a bottom view of the movable floor device shown in FIG. Referring to FIG. 6, the liftable handrail of the movable floor apparatus is close to the inner wall of the opening, along the folding direction or the rotating surface of the folding hatch 1, in other words, the longitudinal peripheral edge (folding) of the opening. Handrails 11a, 11b, 12a and 12b extending along the side where the tatami hatch is not attached (which belong to the first handrail member), and handrails 11c and 12c which cross the center of the opening (they are the first ones) 2 of the handrail member). These handrails 11a, 11b, 12a, 12b, 11c and 12c can be driven independently of each other. The handrails 11a, 11b, 12a and 12b and the handrails 11c and 12c have substantially the same structure. Therefore, the structure of the handrail 11a and the handrail 11c will be described in detail below.
[0032]
[Raising / lowering handrail around the opening edge (first handrail member)]
FIG. 7 is an operation diagram of the movable floor device shown in FIG. Referring to FIG. 7, the handrail 11 a pulls the lower step portion 13 fixed to the housing 62 that forms the longitudinal inner wall of the opening, the middle step portion 14 that moves up and down with respect to the lower step portion 13, and the middle step portion 14. And an upper step portion 15 that moves up and down with respect to the lower step portion 13 and the middle step portion 14. The lower step portion 13, the middle step portion 14 and the upper step portion 15 respectively extend along the inner wall as close as possible to the inner wall of the opening.
[0033]
[Driving system of second-hand type handrail (second driving system)]
A handrail raising / lowering motor 16 is installed in the lower stage portion 13, and a first drum 17 is connected to an output shaft of the handrail raising / lowering motor 16. A second drum 18 is pivotally supported on the lower step portion 13 and below the first drum 17. A belt is wound between the first and second drums 17 and 18, and the driving force of the handrail elevating motor 16 is transmitted to the second drum 18. Further, one end of a wire (strand) 24 is engaged with and wound around the second drum 18, and the wire 24 can be fed and wound.
[0034]
A first constant pulley 19 is pivotally supported at the lower corner of the lower step portion 13, and a second constant pulley 20 is pivotally supported on the upper portion of the lower step portion 13 (above the first constant pulley 19). A first moving pulley 21 is pivotally supported at the lower part of the middle stage 14, and a second movable pulley 22 is pivotally supported at the upper part of the middle stage 14. The wire 24 is wound in the order of the first constant pulley 19, the second constant pulley 20, the first moving pulley 21, and the second moving pulley 22, and the other end of the wire 24 is the wire fixing portion of the upper stage portion 15. It is connected to. When the wire 24 is wound up, the handrail 11a is raised, and when the wire 24 is drawn out, it is lowered. The raising / lowering handrail drive system including the handrail raising / lowering motor 16 is disposed so as to be substantially hidden below the raised middle stage portion 14 and the upper stage portion 15, thereby increasing the effective opening area.
[0035]
In addition, the middle part 14 is pivotally supported by a middle part on the back side of the tread plate 68 via a hinge, and after the handrail is completely lifted, it is rotated to the front side to extend in the horizontal direction. Block the gap between the pillars.
[0036]
FIG. 8 is a schematic diagram for explaining the arrangement of the drive system and sensors of the liftable handrail shown in FIG. Referring to FIG. 8, in the handrail 11a, an engaging portion 15a is formed at an intermediate portion of the upper step portion 15 that is roughly accommodated in the middle step portion 14. As the upper step portion 15 rises, the engagement portion 15a eventually comes into contact with and engages with the upper lower surface 14a of the middle step portion 14. This is detected by the microswitch 75 attached to the upper part of the middle stage part 14. On the contrary, the initial position of the upper stage 15 is detected by the microswitch 74 attached to the middle part of the middle stage 14.
[0037]
After the middle step portion 14 and the upper step portion 15 are brought into contact with each other, when the upper step portion 15 is further lifted by the wire 24, the middle step portion 14 is lifted together with the upper step portion 15 by the contact engagement, and the middle step portion 14 The projecting portion 14b provided at the lower portion comes into contact with the stopper 13b provided at the intermediate portion of the lower step portion 13. As a result, the upper limit of the middle stage 14, and eventually the handrail 11a as a whole, is defined. The upper limit of the entire handrail 11a is that the fixed lever 70 attached to the lower portion of the middle step portion 14 is engaged with the movable lever 71 engaged with the lower step portion 13 so as to be movable up and down, and the lower end of the movable lever 71 is It is detected by contact with a micro switch 72 attached to the upper part of the lower stage part 13. On the contrary, the lower limit of the middle step portion 14 is defined by the lower portion of the middle step portion 14 coming into contact with the column portion provided at the lower portion of the lower step portion 13. The lower limit of the middle step portion 14 is detected by a micro switch 73 attached to the upper portion of the lower step portion 13.
[0038]
[Elevating handrail at the center of the opening (second handrail member)]
  Next, the handrail 11c crossing the center of the opening will be described. FIG. 9 is a side side operation diagram of FIG. Referring to FIG. 9, the upper end of the fixed frame portion of the handrail 11c is pivotally attached to the tip of the tip side hatch 3b (see the left side of FIG. 2). A lower step portion 13 is attached to the fixed frame portion. When the folding hatch 1 to which the handrail 11c is pivoted is folded, the handrail 11c is moved together with the folding hatch 1 toward the inner wall or edge of the opening, and is substantially below or below the tip side hatch 3b. Hidden. On the other hand, when the handrail 11c is folded on the foldable hatch 1 that is not pivotally attached,flap(Raised board)Raised to push 30 away. Since the structure of the handrail 11c and its drive system other than those described above is the same as the structure of the handrail 11a and its drive system, the corresponding description is referred to.
[0039]
[Connection mechanism between handrails and folding hatch]
Next, a configuration for connecting the raised handrail and the folded front end hatch 3b to each other will be described.
[0040]
  FIG. 10 is a perspective view of the movable floor apparatus shown in FIG. Referring to FIG. 10, in the upper stage portion 15 of the handrails 11a and 11b along the inner wall near the inner wall of the opening, the uppermost pipe has one end thereof.(Hatch side edge)Further, a hatch connecting rod (first connecting rod) 41 is accommodated at the other end, and a handrail connecting rod (second connecting rod) 40 is accommodated at the other end in a telescopic manner. An insertion hole 42 for inserting the hatch connecting rod 41 is formed on the front side of the tip side hatch 3b. On the other hand, handrail connecting rods 43 and 43 (third connecting rods) are respectively attached to both ends of the handrail 11c crossing the center of the opening so as to be extendable and contractible.
[0041]
In addition, the handrails 12a, 12b, and 12c shown in FIG.
[0042]
The operation when the movable floor device described above is fully opened will be described. FIG. 11A, FIG. 11B, FIG. 12C, FIG. 13D, and FIG. 14E are process diagrams for explaining the operation of the movable floor device shown in FIG.
[0043]
Referring to FIG. 11A, a pair of folding hatches 1 and 1 including hatches 3a and 3b, respectively, are developed and the opening is fully closed.
[0044]
Next, referring to FIG. 11 (B), the pair of folding hatches 1 and 1 are automatically folded according to an operator's command, and the opening is fully opened.
[0045]
Subsequently, referring to FIG. 12C, the upper stage portion 15 of the handrails 11a, 11b, 12a, and 12b is automatically raised from the peripheral portion of the opening.
[0046]
Next, referring to FIG. 13D, the middle stage 14 of the handrails 11a, 11b, 12a, 12b rises together with the upper stage 15 from the peripheral edge of the opening. After completing the raising of the handrail, the operator tilts the tread board 68 forward.
[0047]
Next, referring to FIG. 14E, the operator connects the handrail connecting rods 40 of the handrail 11a and the handrail 12a and the handrail connecting rods 40 of the handrail 11b and the handrail 12b to each other, and the handrail 11a. , 11b, 12a, 12b are respectively inserted into the insertion holes 42 on both sides of each front end hatch 3b. This partitions the inside and outside of the opening. Then, the operator hangs the chain 50 between the folded proximal end side hatch 3a and distal end side hatch 3b, and mechanically locks both. The operator also hangs the chain 69 between the handrails 11a and 12a and between the handrails 11b and 12b.
[0048]
When the opening is fully closed, the steps described above are executed in reverse. The state when the opening is half open is as described with reference to FIG. 10, and the opening / closing process when half opened is clear from FIG.
[0049]
【The invention's effect】
According to the present invention, there are provided a movable floor device capable of opening and closing the opening safely and easily, and a lift device provided with the movable floor device on each floor.
[Brief description of the drawings]
FIG. 1 is an overall view of a lift device according to an embodiment of the present invention.
2 is a partially cutaway front view of a movable floor device according to an embodiment of the present invention applied to the lift device shown in FIG. 1, in which the left side is a cross-sectional view near the center and the right side is It is a front view.
FIG. 3 is a partially broken plan view of the movable floor device shown in FIG. 2, with the hatch surface on the left side of the figure removed.
FIG. 4 is a side view of the movable floor device shown in FIG.
FIG. 5 is a partial operation diagram of the movable floor device shown in FIG. 2;
6 is a bottom view of the movable floor device shown in FIG. 2. FIG.
FIG. 7 is an operation diagram of the movable floor device shown in FIG. 2;
8 is a schematic diagram for explaining the arrangement of the drive system and sensors of the liftable handrail shown in FIG. 7. FIG.
9 is an operation side view of the central portion of FIG. 7. FIG.
10 is a perspective view of the movable floor device shown in FIG.
11A and 11B are process diagrams for sequentially explaining the operation of the movable floor apparatus shown in FIG. 2;
FIG. 12C is a process diagram following FIG. 11B.
FIG. 13D is a process diagram following FIG. 12C.
FIG. 14E is a process diagram following FIG. 13D.
[Explanation of symbols]
  1 Foldable hatch (hatch member)
  2 Lifting handrail (first handrail member)
  3a Base side hatch
  3b Tip side hatch
  4 Mounting jig
  4a First horizontal beam
  4b Vertical beam
  4c Skew beam
  4d second horizontal beam
  5 cylinders
  5a Cylinder housing
  5b Piston rod
  6,7a, 7b rib
  8 pins
  9 Cylinder drive motor
10 Reducer
11a, 11b, 12a, 12b Handrail (first handrail member)
11c, 12c Handrail (second handrail member)
13 Lower part
13b Stopper for middle rail
14 Middle section
14a Upper lower surface
14b Projection
15 Upper part
15a Engagement part with middle part
16 Handrail lift motor
17 The first drum
18 Second drum
19 First regular pulley
20 Second regular pulley
21 First pulley
22 Second pulley
23 Wire fixing part
24 wires
30, 31flap(Raised board)
40 Interconnecting rod provided in the first handrail member
41 Hatch connecting rod
42 insertion hole
43 Interconnecting rod with second handrail member
50 Chain for hatch lock
61 Chain block
62 body
63 Step on the inner wall of the opening
64 base (folding hatch installation part)
68 Footboard
69 Chain for connecting handrails
70 Fixed lever
71 Movable lever
72, 73, 74, 75 Microswitch

Claims (6)

An opening formed in the floor or ceiling;
A hatch member pivotally attached to a housing around the opening and opening and closing the opening;
A first drive system that opens and closes the hatch member so that one end is connected to the back side of the hatch member and the other end is connected to a housing around the opening so as to be substantially hidden behind or below the hatch member. When,
Prolonged along the rotation surface of the hatch member in the vicinity of the inner wall of the opening, attached to the housing around the opening so as to be accommodated on the back side or below the closed hatch member, and opened. A first handrail member that is raised and lowered in the opening and rises to partition the opening;
The first handrail member is attached to the housing around the opening so as to be substantially hidden below at least one of the raised first handrail member, the opened hatch member, and the housing around the opening. A second drive system for moving up and down;
Have
The hatch members are a pair of hatch members that are pivoted or folded in opposite directions to open one opening, and both are closed or unfolded to fully close the one opening,
The first handrail members are a pair of the first handrail members provided respectively back to the lower of the pair of hatch member,
A pair of second handrail members respectively connected to the tip portions of the pair of hatch members and extending so as to cross the opening;
Have
When fully opening the opening, both the pair of hatch members are opened or folded, and both the pair of first handrail members are raised,
When the opening is half open, one of the hatch members is opened or folded, and one of the first handrail members located behind or below the one hatch member is raised, and the other The other second handrail member connected to the hatch member is raised,
Yes fluidized bed apparatus shall be the features a. Wherein the distal end of the hatch member, the movable floor apparatus according to claim 1, wherein said second flap pivotally raised upward with the of the handrail member is formed. The first handrail member includes a plurality of columns extending in the up-down direction, and a pipe supported by the plurality of columns and extending in the horizontal direction,
The first handrail member is pivotally supported, and after the first handrail member is raised, the first handrail member is rotated and extends in the horizontal direction, and the gaps between the plurality of columns provided in the first handrail member are provided. movable floor apparatus according to claim 1, wherein further comprising a footplate for closing. The first handrail member includes a plurality of columns extending in the up-down direction, and a pipe supported by the plurality of columns and extending in the horizontal direction,
A first connecting rod attached to the hatch member side end of the pipe provided in the first handrail member so as to be stretchable;
A hole formed in the hatch member and into which the first connecting rod is inserted when the hatch member is opened or folded;
Movable floor apparatus according to any one of claims 1-3, characterized in that it comprises a. The first or second handrail member is:
It extends below the inner wall near the opening along the inner wall, and a lower portion supported against the building frame surrounding the opening,
A middle step portion extending along the inner wall near the inner wall of the opening and capable of moving up and down relative to the lower step portion,
An upper step portion extending along the inner wall in the vicinity of the inner wall of the opening, and capable of moving up and down with respect to the middle step portion,
Have
The second drive system is
Drive means attached to the lower stage so as to be located below the raised middle stage and upper stage;
A fixed pulley pivotally supported on the lower stage,
A moving pulley pivotally supported on the middle stage,
One end of which is connected to the driving means and is wound around the fixed pulley and the movable pulley, and the other end is connected to the upper stage portion, and the rope is drawn out and wound up by the driving means,
Having,
The movable floor device according to any one of claims 1 to 4, wherein The movable floor device according to any one of claims 1 to 5 installed on each floor,
A lifting device such as a chain block installed on the top floor;
A lift device comprising:

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