JP2014207940A - Evacuation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evacuation device which is excellent in safety.SOLUTION: In an evacuation device for lifting and lowering a lifting and lowering plate 2 along a guide supporting post 1, the lifting and lowering plate 2 meshes with a rack 3 formed on the guide supporting post 1 via a pinion 4. A descending speed of the lifting and lowering plate is regulated by a speed reduction device 5 connected to the pinion 4 in descending. The pinion 4 is idly rotated with respect to the speed reduction device 5 in ascending, and the lifting and lowering plate is pulled up by a weight 7 connected via a wire 6. In addition, the guide supporting post 1 is formed into a closed cross-sectional shape and houses the weight 7 and the wire 6 in the inside.

Description

  The present invention relates to an evacuation device.

   As an evacuation device that raises and lowers an elevating plate along an upright guide column, a device described in Patent Document 1 is conventionally known. In this conventional example, a pipe-shaped guide body is erected in the vicinity of the outer wall surface of the house, and the boarding platform is moved up and down in a range from the position corresponding to the window on the second floor to the vicinity of the ground.

  The board is connected to a wire fed from a hoisting machine, and the wire feeding speed is buffered by a hydraulic brake mechanism, so that the descending speed of the board is adjusted to be safe. Further, the hoisting machine is provided with an operation unit, and by operating the operation unit, the wire can be wound up and the boarding platform can be raised to a position corresponding to the window on the second floor.

JP-A-9-271522

  However, in the above-described conventional example, since the boarding platform is merely suspended by a wire, the wire is likely to be worn out. For example, when the strength of the wire decreases due to corrosion caused by long-term use, etc. May not be able to withstand the load, and may cause a fall accident for evacuees.

  The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide an evacuation device having excellent safety.

According to the present invention, the object is
An evacuation device that raises and lowers the elevating plate 2 along the guide column 1,
The elevating plate 2 meshes with a rack 3 formed on the guide column 1 via a pinion 4, and the lowering speed is regulated by a reduction gear 5 connected to the pinion 4 at the time of lowering. This is achieved by providing an evacuation device that can be lifted by a weight 7 connected via a slab.

  According to the present invention, the lift plate 2 is provided with a pinion 4 that meshes with a rack 3 formed on the guide column 1. The pinion 4 is connected to a speed reducer 5, and the speed of the elevating plate 2 when the elevating plate 2 is lowered is restricted by the speed reducing device 5. Further, a weight 7 for pulling up the lifting plate 2 is connected to the lifting plate 2 via a wire 6, and the lifting plate 2 is moved by applying a lifting force of the weight 7 to the lifting plate 2. Can be raised.

  Therefore, according to the present invention, the drive control means includes the rack 3 and pinion 4 mechanism in which the speed reducer 5 is incorporated when the elevating plate 2 is raised and lowered, and the weight 7 connected via the wire 6. As a result, the wire 6 connected to the weight 7 does not bear the total load of the evacuees, and the safety can be further improved.

  The elevating plate 2 gradually rises with its ascent rate being restricted by the speed reducer 5. However, the elevating plate 2 decelerates with the pinion 4 only when the elevating plate 2 is lowered using the clutch mechanism as in the embodiment described later. If the device 5 is connected and the pinion 4 is idled with respect to the speed reducer 5 when it is lifted, it quickly rises.

  Since the wire 6 and the weight 7 need only be able to lift the elevating plate 2 at least when the evacuees are not in the boarding state as described above, the wire diameter and weight can be reduced. By utilizing the compactness of the weight 7 and the wire 6 and forming the guide column 1 described above in a closed cross-sectional shape and accommodating the weight 7 and the wire 6 therein, the appearance of the evacuation device can be enhanced. it can.

  The rack 3 that bears the load of the evacuees when descending is also required to have high dimensional accuracy in order to ensure safety. The rack 3 can be formed integrally with the guide column 1 by processing. However, when the mesh opening 8 that meshes with the pinion 4 is opened at a predetermined pitch in the belt-like member, the pinion Compared to the case where the teeth that mesh with the guide post 1 are integrally formed with the guide post 1 at a predetermined pitch, the dimensional accuracy of the meshing position with the pinion 4 can be easily secured over the entire length of the long length, and it is manufactured. Efficiency can also be increased.

  Further, when the rack 3 is manufactured in this way, a clearance 9 is provided on the back surface of the meshing opening 8 so that the tooth tip of the pinion 4 can enter and guides the rack mounting portions 10 that support both side edges of the rack 3. If it forms in the support | pillar 1, it can give flexibility to the meshing depth with the pinion 4, and it can be easily meshed with the pinion 4, and even if the evacuation device is installed outdoors, the meshing opening 8 is formed by dust or the like. Can prevent clogging.

  In addition, when the guide column 1 is provided with a guide portion 11 that guides the weight 7 and restricts rolling due to the vertical movement thereof, the lifting plate 2 can be smoothly moved up and down, and the wire 6 can be bent. Since it is prevented from being twisted, its durability can be improved.

  Furthermore, when a pair of reduction gears 5 is provided at a position straddling the guide column 1 and connected to each end of the rotary shaft 12 projecting from the pinion 4 to both sides, the rotation balance of the pinion 4 is improved and the rack 3 is moved. Can prevent unnecessary stacking.

  As is clear from the above description, according to the present invention, an evacuation device with excellent safety can be provided.

It is a figure which shows the installation state of the evacuation apparatus which concerns on this invention, (a) is an overhead view, (b) is a top view. It is a principal part longitudinal cross-sectional view which shows an evacuation apparatus. It is a figure for demonstrating the guide structure of the vehicle body by a guide support | pillar, (a) is a principal part longitudinal cross-sectional view, (b) is a principal part cross-sectional view. It is a perspective view for demonstrating the structure of a stopper or a reduction gear. It is principal part sectional drawing for showing operation | movement of a stopper, (a) is a figure which shows an operation state, (b) is a figure which shows a stopper release state. It is a figure for demonstrating the meshing structure with the rack of a pinion, (a) is a principal part cross-sectional view, (b) is a principal part longitudinal cross-sectional view. It is a figure for demonstrating the usage of an evacuation apparatus, (a) is a principal part longitudinal cross-sectional view which shows a non-use state, (b) is a principal part longitudinal cross-sectional view which shows the state which unlocked the upper cover. It is a figure for demonstrating how to use an evacuation apparatus, and is a principal part longitudinal cross-sectional view which shows a use condition. It is a figure for demonstrating how to use an evacuation apparatus, and is a top view which shows a use condition.

  As shown in FIGS. 1 and 2, the evacuation device is used to evacuate from the upper floor veranda 21 to the lower floor veranda 22 in an emergency, and is opened on the floor slab 21a of the upper floor veranda 21. The case 23 is fitted and fixed to the opened opening 21b, and the guide column 1 is erected on the floor slab 22a of the veranda 22 on the lower floor. In FIG. 1, reference numeral 24 denotes a veranda handrail, 25 denotes a window, and 26 denotes a building outer wall.

  The case 23 is formed in a cylindrical shape having the same height as the floor slab 21 a and has an escape opening 27 inside. The upper and lower open portions of the escape opening 27 can be opened by the upper lid 28 and the lower lid 29. Block. The upper lid 28 is connected to the case 23 so as to be vertically rotatable around the pivot 30. On the other hand, the lower lid 29 is integrally provided on a lifting plate 2 described later housed in the case 23. In FIG. 2, reference numeral 31 indicates that the unlocking operation can be performed by slightly opening the upper lid 28 and putting a hand into the case 23 main body through the gap, and the upper lid is larger than the gap in which the hand can be put in the locked state as described above. It is a child lock that restricts the opening of the door 28. Reference numeral 28a shown in FIG. 8 and the like is a handle.

  On the other hand, the guide column 1 is a hollow pipe body having an appropriate buckling strength, and is formed by extruding aluminum, for example. The lower end portion of the guide column 1 is fixed to the floor slab 22a on the lower floor via a fixing bracket 32 by an anchor member (not shown). Further, the upper end portion of the guide column 1 is fixed to the case 23, specifically the inner wall surface thereof, through a ceiling plate 33 described later functioning as a fixture.

  Further, the above-described lifting plate 2 is accommodated in the case 23 in order to carry the refugee A from the upper floor to the lower floor. The elevating plate 2 is formed by fixing a flat stage plate 2b on the upper surface of the frame-shaped base 2a, and the lower lid 29 is arranged on the bottom surface of the frame-shaped base 2a on the outer side of the frame-shaped base 2a. The part is fixed so as to overhang.

  Further, as shown in FIG. 3, the guide column 1 described above is almost entirely seen from the side at the front end portion of the lifting plate 2 (hereinafter, the side where the guide column 1 is provided is referred to as the front side in this specification). A bracket 34 having a cylindrical portion surrounding the periphery is fixed. The bracket 34 includes upper and lower main / sub rollers 36a and 36b that contact the rear surface of the guide column 1, a back roller 36c that contacts the front surface of the guide column 1, and a front surface of the guide column 1 along the longitudinal direction. Balance rollers 36d that come into contact with the side walls of the formed recesses 1a are mounted so as to be freely rotatable around the support shafts 35, and the elevating plate 2 guides the support columns while rolling these rollers 36a, 36b, 36c, 36d. Go up and down along 1.

  3, reference numeral 36e denotes a long block shape having a sliding contact surface with the side surface of the guide column 1 and is fixed to the bracket 34 so as to be on the lifting plate 2 side like the main roller 36a described above. It is a slip member as the guided portion 36 by the guide column 1. Further, in order to determine the upper and lower stroke end of the lifting plate 2, the upper end of the guide column 1 is in contact with the tip of the shock absorber 37 fixed to the bracket 34 as shown in FIGS. The ceiling plate 33 is attached, and a cushion member 38 that abuts against the bottom surface of the elevating plate 2 is fixed to the upper surface of the fixing bracket 32. The elevating plate 2 is accommodated in the case 23 when the upper stroke end position is taken, and the lower lid 29 closes the lower open portion of the escape opening 27 in this state.

  In addition, a stopper 39 is provided in the evacuation device in order to prevent the elevating plate 2 from falling down from the upper stroke end position when the evacuee A gets in. As shown in FIGS. 4 and 5, the stopper 39 is arranged on the lifting plate 2 side, is provided on the guide column 1 side with a stopper member 40 having a hook portion 40a at the tip and rotatable around the rotation shaft 41. And a hooked portion 42 to which the hook portion 40a is engaged and disengaged.

  In the stopper member 40, a pedal portion 40b is installed between the pair of hook portions 40a, 40a to form a substantially U shape in plan view, and the pair of hook portions 40a, 40a are straddled on both sides of the guide column 1. By arranging in this manner, the pedal portion 40b can swing in the vertical direction in the vicinity of the rear surface of the guide column 1. The stopper member 40 is biased upward by the torsion spring 43, that is, counterclockwise in FIG. On the other hand, the locked portion 42 is formed of U-shaped bolts attached to both side surfaces of the guide column 1 and is provided at a position where the hook portion 40a is locked when the elevating plate 2 takes the upper stroke end position. .

  Accordingly, the stopper member 40 is urged by the torsion spring 43 in the direction in which the hook portion 40a is locked to the locked portion 42, and as shown in FIG. In the state accommodated in 23, it latches to the to-be-latched part 42, and hold | maintains the raising / lowering plate 2 in the upper stroke end position. As shown in FIG. 5 (b), when the pedal portion 40b is stepped on by the refugee A (not shown) from this state, the stopper member 40 rotates clockwise, that is, in the unlocking direction with respect to the locked portion 42. The elevating plate 2 that has lost its support descends due to its own weight and the load of the refugee A.

  When the operation force to the pedal portion 40b is released, a counterclockwise rotational force, that is, a return force to the original position is applied to the stopper member 40 by the torsion spring 43. In this state, when the elevating plate 2 rises toward the upper stroke end position, the inclined surface 40c formed in the hook portion 40a comes into contact with the locked portion 42 and a counterclockwise component force acts on the stopper member 40, As a result, the hook portion 40a avoids the locked portion 42 and the elevating plate 2 is further raised. Thereafter, when the upper stroke end position is reached, the hook portion 40a exceeds the locked portion 42, so that the torsion spring 43 elastically locks to the locked portion 42, and the stopper 39 is in an activated state. Return automatically.

  Furthermore, a handrail device 44 is provided on the elevating plate 2 in order to enhance safety during evacuation. The handrail device 44 is formed to be foldable. As shown in FIGS. 7 to 9, the handrail device 44 is foldably connected to the elevating plate 2 and is foldably connected to the support leg 45. And a handrail body 46.

  The handrail body 46 is formed in a substantially U shape by extending a straight handrail-shaped horizontal handrail portion 46b in the orthogonal direction from both ends of the straight handrail portion 46a. For example, the handrail body 46 has a substantially U shape. It can be made by coding the surface of a bent metal pipe with a perfect circular section with a synthetic resin material. The front handrail portion 46a has a length that is slightly larger than the width of the elevating plate 2, and the horizontal handrail portion 46b has a length that is slightly larger than the general thickness of an adult male. Formed into dimensions.

  On the other hand, the support leg 45 is telescopically formed by connecting a pair of large and small straight pipe bodies 47 in a telescope shape. The support leg 45 is formed by using, as the pipe body 47 described above, a metal pipe having a perfect cross-section as a pipe body 47 coated with a synthetic resin material, and the like. In order to connect with the free end portion, a pair is formed in the same manner as the horizontal handrail portion 46b. In FIG. 7 and the like, reference numeral 48 denotes a guide member for restricting the relative movement of the pair of large and small pipe bodies 47A and 47B so as not to separate. The hollow portion of the support leg 45 is provided with a restraining means (not shown) capable of restricting relative movement of the pair of large and small pipe bodies 47A and 47B in the extended state.

  As shown in FIG. 7 and the like, the support leg 45 is connected to the lift plate 2 at the end opposite to the handrail body 46, and the front end of the lift plate 2 is kept low in order to keep the height when folded. It is connected to the side surface of the unit by a vertical rotation shaft 49 so as to be vertically rotatable. In addition, in FIG. 7 etc., 50 is a connection piece fixed to the side surface side of the frame-like base 2a and supporting the vertical rotation shaft 49 on the lifting plate 2 side. Reference numeral 62 denotes a reinforcing member that couples the pair of support legs 45, 45 at the middle portion in the longitudinal direction to increase the rigidity of the support legs 45. Further, in order to constrain the support leg 45 to the deployed posture shown in FIG. 8, the lifting plate 2 is provided with a posture restraining means (not shown) that holds the support leg 45 as it moves from the folded posture to the deployed posture. It is done.

  Further, the handrail body 46 and the support leg 45 described above are connected via a connecting bracket 34 as shown in FIGS. 7 and 8. The connecting bracket 34 is non-rotatably fixed to the free end portion of the horizontal handrail portion 46b, and is connected to the tip end portion of the support leg 45 via a vertical rotation shaft 51 so as to be freely rotatable. The posture can be changed between a folding posture in which the legs 45 are substantially parallel to the horizontal handrail portion 46b and a deployed posture in which the legs 45 are substantially orthogonal to each other. The connecting bracket 34 is provided with posture restraining means (not shown) that restrains the support leg 45 in the deployed posture in accordance with the movement from the folded posture to the deployed posture, almost the same as the boarding bracket 34 described above.

  Therefore, after the upper lid 28 is opened, when the handrail body 46 is pulled upward by grasping an intermediate portion of the horizontal handrail portion 46b, the support leg 45 is attached to both the lift plate 2 and the handrail body 46 as shown in FIG. On the other hand, the posture can be changed from the folded posture to the deployed posture, and the handrail device 44 can be changed from the folded state to the in-use state.

  At this time, as shown in FIG. 9, the substantially U-shaped handrail body 46 faces the open end toward the rear, and slightly above the guide column 1 on the lifting plate 2, the upper space is separated from the front handrail portion 46 a. A boarding area for the refugee A surrounded by the side rails 46b and 46b from three sides is formed. Further, as shown in FIG. 9, a foot-shaped mark 52 is formed on the stage plate 2 b at the center in the boarding area, so that the refugee A who has entered the handrail body 46 from the open end can see the foot. By taking an upright posture by aligning the position of the back of the foot with the foot-shaped mark 52, the body of the refugee A is naturally guided in the boarding area. In FIG. 9, reference numeral 53 denotes a guidance display for guiding the depression operation of the pedal portion 40B, and the surface is formed of an embossed sheet and has a non-slip shape that prevents slipping or falling due to rain water or the like.

  Further, as shown in FIG. 8, in this state, the height of the handrail body 46, that is, the front handrail portion 46a and the side handrail portion 46b from the upper surface of the elevating plate 2 is a general waist height of an adult male who takes an upright posture. The evacuee A in the boarding area can grip the handrail body 46 in a natural posture. Furthermore, since the lower space of the boarding area is closed on both sides by the support legs 45 that are inclined in the deployed posture, the vicinity of the knee or the like may deviate from the boarding area due to a shift to the body side. There is no.

  Next, when the refugee A steps on the pedal portion 40b and releases the stopper 39, the refugee A passes through the evacuation opening 27. However, the evacuation person A moves to the evacuation opening by being located in the above-described boarding area. 27 does not hit the periphery of 27. In addition, when the evacuee A receives a recoil at the initial movement of the descent, the evacuee A does not feel much fear because it is held by the handrail device 44. Further, the evacuee A faces the guide column 1 as it descends, and the front of the evacuee A is blocked by the guide column 1, so the lower region on the body side is blocked by the support leg 45 as described above. In combination with this, you can feel a strong sense of security and stability on your feet, preventing you from cramping your feet.

  Furthermore, in the above evacuation device, as shown in FIG. 6, there is an operation assisting unit 54 for assisting and suggesting the state transition operation of the handrail device 44 from the folded state to the use state by the evacuee A during use. Provided. In this embodiment, the operation assisting portion 54 is configured by assembling a spring that urges the handrail device 44 from the folded state to the use state side so as to protrude from the upper surface of the case 23. . The biasing force of the spring 54 is made smaller than the pressing force to the folded state side that acts on the handrail device 44 due to the weight of the upper lid 28.

  Therefore, when the evacuee A opens the upper lid 28, the handrail device 44 is automatically driven slightly from the folded state to the used state, and the unfolding operation of the handrail device 44 from the folded state to the used state can be assisted. Moreover, since this unfolding operation is intuitively understood by the refugee A, it is possible to prompt the unfolding operation of the handrail device 44 thereafter smoothly.

  Furthermore, in order to reduce the descending speed of the elevating plate 2 when the stopper 39 is released as described above, the evacuation device is provided with a gentle descending device 55. As shown in FIGS. 3 and 4, the slow descending device 55 includes a rack 3 that is fixed to the guide column 1, a pinion 4 that is rotatably provided on the elevating plate 2 and meshes with the rack 3, and the pinion 4 and the speed reducer 5 connected to the rotary shaft 12.

  The rack 3 is formed by opening through-hole-shaped meshing openings 8 at a predetermined pitch in a high-strength plate material such as stainless steel, and has a length that covers almost the entire length of the guide column 1. As shown in FIG. 6, a rack mounting portion 10 is formed on the rear surface of the guide column 1 so as to have a groove 56 at the center in the width direction and support both side edges of the rack 3. 3 is secured by the groove 56 behind the meshing opening 8.

  The pinion 4 is made of the same material as that of the rack 3, and the number of teeth thereof is adjusted so that a plurality of teeth can mesh with the rack 3 at the same time. The pinion rotating shaft 12 is also configured to serve as the support shaft 35 of the main roller 8a described above.

  On the other hand, the speed reducer 5 is of a centrifugal brake type, and operates when the rotational speed of the pinion 4 exceeds a predetermined value to limit the rotational speed. The speed reduction device 5 is connected to the rotation shaft 12 of the pinion 4 via a one-way clutch 57, and the rotational force is only applied from the pinion 4 to the one-way in the rotation direction of the pinion 4 according to the descending operation of the lifting plate 2. This is transmitted to the reduction gear 5 through the clutch 57. In FIG. 4, reference numeral 58 denotes a gear that incorporates the one-way clutch 57 and transmits only the rotational force of the pinion 4 when the elevating plate 2 is lowered to the reduction gear 5. In addition to the centrifugal brake type as described above, for example, a mechanical friction type or a fluid resistance type can be used as the reduction gear 5.

  Therefore, as described above, when the elevating plate 2 descends by releasing the stopper 39, the pinion 4 is forcibly rotated by meshing with the rack 3, and the rotation speed of the pinion 4 is limited by the reduction gear 5. As a result, the lowering speed of the elevating plate 2 is reduced. Moreover, when the pinion 4 and the rack 3 mesh at the same time in a plurality of teeth, the load burden on the evacuees A and the lifting plate 2 can be well dispersed. Furthermore, if a centrifugal brake type is used as the speed reducer 5 as described above, quick evacuation is possible even when the weight of the evacuee A is lighter than that of a mechanical friction type or the like.

  Note that the overall height of the elevating plate 2 on which the above-described slow descending device 55, the handrail device 44 in the folded state, and the stopper 39 described above are mounted is set to be lower than the height of the case 23. The

  On the contrary, in order to raise the elevating plate 2, the evacuation device is provided with a weight 7 and a wire 6. As shown in FIGS. 2 and 3B, the weight 7 is formed in a column shape that is much shorter than the guide column 1 and is accommodated in the guide column 1 so as to be movable up and down. The weight 7 has a weight that is more than twice that of the lifting plate 2.

  On the other hand, as shown in FIG. 2 and FIG. 3A, the wire 6 has one end attached to the hanging bracket 59 attached to the upper end of the guide column 1 and the other end attached to the bracket 34 of the elevating plate 2. It is fixed to the hanging metal fitting 59 '. The wire 6 is hung around a moving pulley 60 attached to the upper surface of the weight 7 described above at an intermediate portion and a fixed pulley 61 attached to the upper end portion of the guide column 1 so that the lifting plate 2 is at the end of the upper stroke. The weight 7 is hung near the lower end of the guide column 1 when the position is taken, and slightly above the center of the guide column 1 when the lower stroke end position is taken.

  Therefore, as described above, the elevating plate 2 that has been lowered with the evacuee A arrives at the lower stroke end position, and when the evacuator A descends from the elevating plate 2 thereafter, the elevating plate 2 causes the weight 7 to wire the wire 6. And can be returned to the upper stroke end position. As described above, since the one-way clutch 57 is incorporated in the slow-down device 55, the elevating plate 2 rises quickly without being interrupted by the speed reducer 5.

  Further, as shown in FIG. 3B, the inner wall surface of the guide support column 1 is close to the outer peripheral surface of the weight 7 with a narrow gap, and the weight 7 swings like a pendulum or rotates horizontally. A guide portion 11 that restricts the movement is formed. For this reason, unnecessary rolling of the weight 7 that moves up and down simultaneously with the lifting plate 2 can be prevented, and since the protruding contact surface is small, the frictional resistance due to the vertical movement of the weight 7 can be reduced. The plate 2 can be lifted and lowered smoothly, and the wire 6 is not twisted and worn. In this embodiment, a light and highly durable wire using carbon fiber is used for the wire 6.

  As described above, the wire 6 that connects the elevating plate 2 and the weight 7 can be reduced in the diameter of the segment where it is not necessary to support the weight, and the durability of the wire 6 itself can be improved by being flexible. It became possible. Moreover, the use of carbon fiber for the wire 6 enables a durable lifting device.

  Therefore, when the elevating plate 2 carrying the evacuee A descends to a height at which safe evacuation to the lower veranda 22 is possible, the descending operation stops after contacting the cushion material 38 of the fixed bracket 32. When the refugee A gets off the lifting plate 2, the lifting plate 2 is lifted by the action of the weight 7. When the shock absorber 37 comes into contact with the ceiling plate 33 of the guide column 1 and the lift plate 2 reaches the upper stroke end position, the stopper 39 is operated. Therefore, when there is another refugee A left on the upper floor, In this state, the user can get on the lifting plate 2 and release the stopper 39 to evacuate following the evacuee A who has evacuated earlier.

DESCRIPTION OF SYMBOLS 1 Guide support | pillar 2 Lifting plate 3 Rack 4 Pinion 5 Reduction gear 6 Wire 7 Weight 8 Meshing opening 9 Space | gap 10 Rack mounting part 11 Guide part 12 Rotating shaft

Claims (6)

An evacuation device that raises and lowers a lifting plate along a guide column,
The elevating plate meshes with a rack formed on the guide column via a pinion, and when it is lowered, the lowering speed is regulated by a reduction gear connected to the pinion. Evacuation device lifted by weight.   The evacuation device according to claim 1, wherein the guide column is formed in a closed cross-sectional shape, and the weight and the wire are accommodated therein.   The evacuation device according to claim 1 or 2, wherein the rack is formed by opening a meshing opening that meshes with a pinion at a predetermined pitch in a belt-shaped member.   4. The evacuation device according to claim 3, wherein a rack mounting portion is formed on the guide support post to secure a gap through which a tooth of the pinion can enter on a back surface of the meshing opening and support both side edges of the rack.   The evacuation device according to any one of claims 1 to 4, wherein a guide portion that guides the weight and restricts rolling caused by the vertical movement of the weight is formed on the guide column.   The evacuation device according to any one of claims 1 to 5, wherein a pair of the reduction gears are provided at a position straddling the guide column, and are connected to each end portion of the rotating shaft that protrudes from the pinion to both sides.

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