JP2007002452A - Escape ladder equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide escape ladder equipment which can be smoothly operated for development, which is excellent in operation reliability, and which has a good appearance. <P>SOLUTION: This escape ladder equipment comprises: a ladder device 3 which is formed by connecting both ends of a ladder cross member 2 to a pair of ladder vertical members 1 in a vertically turnable manner, and which is developed by vertically turning the cross member 2 to a horizontal attitude by self-weight; a braking cable 4 which is arranged between the vertical members 3, the extra-length section 4a of which is inserted into a tubular member 5 longer in the longitudinal direction of the ladder device 3, and which is pulled out from the tubular member 5 along with the development of the ladder device 3; and a damper device 6 which is housed in the tubular member 5 and connected to the extra-length section 4a of the braking cable 4, and which decreases the development speed of the ladder device 3 by suppressing the speed of pulling out the braking cable 4 from the tubular member 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an escape ladder apparatus.

  As a ladder device that expands from a storage state to a use state, a device described in Patent Document 1 is conventionally known. In this conventional example, the ladder device has an upper ladder and a lower ladder, and is formed by overlapping the lower ladder on the upper ladder fixed to the upper surface of the lid that closes the opening of the ceiling. The lower ladder is slidably attached to the upper ladder, the lid is opened obliquely downward, the lower ladder is slid downward, the ladder is extended, and the lower end of the ladder is in contact with the floor. Expand to.

  A rotary damper device is fixed to the back of the ceiling, and the rope drawn from the device is fixed to the upper ladder. The rotary damper device rotates the pulley body by pulling the rope to wind the spring, and simultaneously winds the coil spring of the one-way clutch to rotate the rotating shaft of the rotary damper, thereby braking the movement of pulling the rope. Therefore, when opening the lid, the movement of opening the lid downward is braked by pulling the rope by the dead weight of the lid, the upper ladder, and the lower ladder, and the lid can be opened gently. After this, the use of the ladder is over, the lower ladder is overlaid on the upper ladder, the ladder is shortened, and the lid is closed.The drawn rope is attached to the mainspring by the one-way clutch regardless of the rotary damper. It is wound on a pulley body that rotates by force.

Furthermore, in order to prevent the lower ladder from popping out unexpectedly when the lid is opened, a rotary damper device is similarly attached to the upper ladder. The rope of this rotary damper device is connected to the lower ladder, and thereby the movement of the lower ladder is braked when the ladder is extended, and the rope is extended slowly.
JP-A-6-248867

  However, in the above-described conventional example, since the rope, spring, and coil spring are wound or unwound by the rotary damper device, malfunctions are likely to occur due to entanglement, and lack of operational reliability.

  Moreover, since the pulley body for winding a rope etc. is incorporated, the magnitude | size of a rotary damper apparatus will become large, and the deterioration of an external appearance etc. will be caused.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide an evacuation ladder device that has a smooth unfolding operation, excellent operation reliability, and a good appearance.

According to the present invention, the object is
A ladder device 3 that is formed by connecting both ends of a ladder cross member 2 to a pair of ladder vertical members 1A and 1B so as to be vertically rotatable, and deploying the ladder cross member 2 by rotating it vertically to a horizontal posture by its own weight;
The extra length portion 4a, which is arranged between the ladder vertical members 1A and 1B, is inserted into the tubular member 5 which is long in the longitudinal direction of the ladder device 3, and is pulled out from the tubular member 5 as the ladder device 3 is deployed. Braking cable 4 to be
A damper device 6 housed in the tubular member 5 and connected to the extra length portion 4a of the braking line 4 to suppress the pulling speed of the braking line 4 from the tubular member 5 and reduce the deployment speed of the ladder device 3; This is accomplished by providing an evacuation ladder device.

  According to the present invention, the ladder apparatus for evacuation is formed by braking the braking cable 4 pulled out by the deployment operation due to the weight of the ladder apparatus 3 by the damper apparatus 6. The ladder device 3 is formed by connecting both ends of a ladder cross member 2 to a pair of ladder vertical members 1A and 1B so as to be vertically rotatable, and by rotating the ladder cross member 2 vertically from a vertical posture to a horizontal posture, The ladder longitudinal members 1A and 1B are deployed in a deployed state in which the ladder longitudinal members 1A and 1B are spaced apart from each other. The brake cable 4 is routed between the ladder vertical members 1A and 1B so as not to be parallel to at least the ladder horizontal member 2, and is pulled out by the expansion of the interval between the ladder vertical members 1A and 1B accompanying the development. As a result, the speed of pulling out the ladder device 3 is reduced to a safe level.

  Further, since the extra length portion 4a of the braking cable 4 is inserted into the tubular member 5 that is long in the longitudinal direction of the ladder device 3 and is accommodated in an extended state inside the tubular member 5, the ladder device 3 is unfolded. There is no entanglement during operation or folding. Since this tubular member 5 is long in the longitudinal direction of the ladder device 3, that is, in the longitudinal direction of the ladder vertical member 1, it does not impair the overall appearance of the evacuation ladder device. For example, it is possible to configure the ladder device 3 to serve as the vertical member for connecting the ladder device 3 to the building wall surface 8 along the longitudinal direction thereof or the ladder vertical member 1. Thus, when a vertical member or the like is used as a means for accommodating the braking cable 4, installation of the means for accommodating the braking cable 4 and its storage space, which are conventionally required, can be substantially omitted.

  Further, as described above, by controlling the pulling speed of the braking cable 4 accommodated in the tubular member 5 by the damper device 6 disposed in the tubular member 5 in the same manner, the installation space for the damper device 6 that has been conventionally required is provided. Can also be omitted. Even when the inside of the tubular member 5 is narrow, the damper device 6 applies a load to the movement of the braking cable 4 in the pull-out direction by way of a chain and a sprocket as shown in an embodiment described later, for example. It is possible to arrange the brake cable 4 at an appropriate position within the travel route range of the braking cable 4 stored in the extended state.

In addition to making it difficult to pull out the braking cable 4 in this way, if it is also urged in the retracting direction, it is possible to effectively prevent the entanglement when the braking cable 4 is housed, and when the ladder device 3 is housed. The braking cable 4 can be easily accommodated inside the tubular member 5 and the ladder device 3 is difficult to deploy, so that the braking load on the damper device 6 can be reduced. The urging means 7 can be constituted by a weight as well as a spring. As described above, the braking cable 4 extending in the longitudinal direction of the ladder device 3, that is, the vertical direction, gives an urging force by a tension spring or the like. It is also possible to use a weight by setting the retracting position into the tubular member 5 at a high place. If the urging force is given by the weight, the urging force in the retracting direction can be given stably for a long time. Further, by urging the braking cable 4 in the retracting direction in this way, it is possible to reduce the load during storage in which the ladder device 3 is pushed down and the ladder cross member 2 is vertically rotated upward from the horizontal posture to the vertical posture. For example, the ladder device 3 can be easily accommodated manually.

  In addition, if one of the ladder vertical members 1A in the ladder device 3 described above is connected to the building wall surface 8 via the link body 10 that can freely rotate vertically, the ladder device 3 can be easily accommodated along the building wall surface 8. In use, it is possible to make it easy to change by facing the evacuation exit opened on the building wall surface 8. In this case, the link body 10 is also rotated by its own weight in the same manner as the ladder cross member 2, so that it is not necessary to apply power for the unfolding operation from the outside. Thus, the deployment speed can be made safe. If the opposite end of the ladder member 1A of the link body 10 is accommodated in the fixed member 9 connected to the building wall surface 8, the braking cable 4 and the damper device 6 are not moved by the unfolding operation, and thus the operation reliability is further improved. be able to.

In addition, an invention is proposed in which the escaping operation of the evacuation ladder apparatus that is deployed in multiple stages via the link body 10 can be made smooth, and the operation reliability is excellent. According to this invention, the ladder device for evacuation is
A link body 10 that is formed by connecting both ends of a ladder cross member 2 to a pair of ladder longitudinal members 1A and 1B so as to be vertically rotatable, and is vertically rotatable with respect to a fixed longitudinal member 9 fixed to a building wall surface 8. A ladder device 3 to which one of the ladder vertical members 1A is coupled via a self-weight, and the ladder cross member 2 and the link body 10 are vertically rotated to a horizontal posture by their own weight;
The ladder member 3 is routed from the fixed longitudinal member 9 through the ladder longitudinal member 1A to the other ladder longitudinal member 1B to which the link body 10 is not connected. A brake cable 4 that is pulled out from the brake cable storage means 11 against the damper device 6 formed in the brake cable storage means 11 as it is deployed;
The pulling length of the braking cable 4 between one of the ladder vertical members 1A having a large rotational load and the fixed vertical member 9 is made larger than that between the ladder vertical members 1A and 1B, so that the link body 10 and the ladder horizontal member 2 It is configured by reducing the rotational speed difference.

  In the present invention, the brake cable 4 whose pulling-out speed from the brake cable storage means 11 can be suppressed by the damper device 6 is a ladder vertical member from the fixed vertical member 9 fixed to the building wall surface 8 via one of the ladder vertical members 1A. The other side 1B is routed to brake the rotation of both the link body 10 and the ladder cross member 2 so that the unfolding operation by the dead weight of the ladder device 3 is made safe and smooth. In addition, when the rotational speeds of both the link body 10 and the ladder cross member 2 are braked by the single continuous braking cable 4 in this way, the load applied when the link body 10 rotates is the link body 10 and the ladder device 3. In other words, the load applied when the ladder cross member 2 is rotated is only one of the ladder cross member 2 and the ladder vertical member 1 while the pair of the ladder cross member 1 and the ladder cross member 2 are present. These rotational speeds differ depending on the load. In order to solve this problem, in the present invention, the braking cable 4 has a pull-out length between one of the fixed vertical member 9 and one of the ladder vertical members, that is, the portion corresponding to the link body 10 between the ladder vertical members 1A and 1B, that is, It is made longer than the pull-out length of the part corresponding to the ladder cross member 2. Therefore, the amount of pulling out of the braking cable 4 with respect to the unit rotation angle of the link body 10 is larger than that in the case of the ladder cross member 2, so that the link body 10 that rotates by receiving a relatively large load and the relatively small load. The difference in rotational speed between the ladder cross member 2 that rotates in response to the rotation can be reduced, and the deployment operation of the ladder device 3 can be made smoother. The lengths of the portions corresponding to each of the link body 10 and the ladder cross member 2 of the braking cable 4 are set such that, for example, as shown in an embodiment described later, the routing angle of the braking cable 4 at these portions is the link body 10 or It is possible to adjust depending on how much the ladder cross member 2 is different. In the present invention, the braking cable storage means 11 for storing the braking cable 4 includes not only a tubular member into which the braking cable 4 can be inserted, but also a pulley for winding and storing the braking cable 4. It is possible to configure.

In addition, another invention is proposed in which the evacuation ladder device that is similarly deployed in multiple stages via the link body 10 can be smoothly deployed and the operation reliability is excellent. According to this invention, the ladder device for evacuation is
The ladder cross member 2 is connected to the ladder vertical member 1 that moves between the storage position and the use position by the rotation between the vertical posture and the horizontal posture of the link body 10 that is connected to the vertical rotation freely. Formed,
A cam member 12 that restrains the link body 10 in the horizontal posture of the ladder cross member 2 and holds the ladder vertical member 1 in a use position is rotatably connected to the ladder vertical member 1.

  In the present invention, a cam member 12 is further rotatably connected to the ladder longitudinal member 1 in which both the link body 10 and the ladder cross member 2 are connected to be vertically rotatable. The cam member 12 restrains the link body 10 at a predetermined position at a predetermined rotational position. The cam member 12 is rotated by the rotation of the ladder cross member 2 so that the link body 10 is in a horizontal posture when the ladder cross member 2 takes a horizontal posture. The ladder vertical member 1 is held at the use position. The restraint of the ladder cross member 2 by the cam member 12 is released by returning the member on the side not restrained by the cam member 12 to the original position, that is, by shifting the ladder cross member 2 from the horizontal posture to the vertical posture. Therefore, the cam member 12 can unify the procedure for deploying and storing the ladder cross member 2 and the link body 10, and can prevent erroneous operations and erroneous operations due to differences in procedures. Moreover, when the ladder cross member 2 takes a horizontal posture, the link body 10 is held in a horizontal posture, so that when the evacuees are evacuating along the ladder cross member 2, the ladder device 3 is stored in a delusional position. Therefore, the safety at the time of evacuation by the ladder device 3 can be improved.

  Further, when the ladder device 3 takes the storage position by the cam member 12, that is, when the link body 10 takes a vertical posture, the ladder cross member 2 is prevented from rotating to the horizontal posture, for example, as described above. When the use position is set at a position slightly away from the building wall surface 8 along the building wall 8 as in the invention, the evacuees waiting at a position where the ladder device 3 can be transferred, that is, The ladder device 3 can be prevented from being deployed in the vicinity of an evacuee waiting for deployment of the ladder device 3 assuming the ladder cross member 2 taking a horizontal posture at the use position, and the safety at the time of deployment of the ladder device 3 is improved. be able to.

  As is clear from the above description, according to the present invention, it is possible to provide a ladder apparatus for evacuation that has a smooth deployment operation and excellent operation reliability, so that safe and prompt evacuation from a disaster is possible. Can be. Moreover, since the ladder apparatus for evacuation with a favorable external appearance can be provided, the external appearance of a building etc. can be maintained favorable.

  FIG. 1 shows a use state of an evacuation ladder apparatus according to the present invention. In this embodiment, the evacuation ladder device is attached to one wall surface 8 of a four-story building, and the ladder device 3 is fixed to face the window 20 serving as an evacuation port on each floor of the building in the event of a disaster.

  The ladder device 3 is formed by connecting both ends of a ladder bar (ladder horizontal member 2) to a pair of vertical bars (ladder vertical member 1) so as to be vertically rotatable, and at a predetermined pitch in the longitudinal direction of the vertical bar 1. When all the ladder bars 2 to be arranged are synchronously rotated, the movable side vertical bar (the other 1B of the ladder vertical member) is close to the reference side vertical bar (the ladder vertical member 1A). It deform | transforms between a folding attitude | position and the expansion | deployment attitude | position which becomes parallel across the length dimension of the ladder beam 2 substantially. Each vertical bar 1 has a length from the window 20 on the fourth floor of the building to the ground 21, and each ladder bar 2 has a length more than half the width of each window glass 22, and is formed into a pipe shape by extrusion of aluminum. Manufactured. The ladder device 3 is attached to the building wall surface 8 through a connecting bar (link body 10) that can freely rotate vertically.

  The connecting bar 10 holds the ladder device 3 at a position spaced apart from the building wall surface 8 in a used state and closes the building wall near the back when evacuating along the ladder device 3 with the back facing the building wall surface 8. 8 is arranged to create a sense of security, and is made into a pipe shape having a length of about 500 mm to 600 mm by extrusion of aluminum, and both ends are connected to the building wall surface 8 and the ladder device 3. . In order to connect the connecting bar 10 to the building wall surface 8, a fixed rail (fixed vertical member 9) made of an aluminum extruded product having the same length as the vertical bar 1 is attached to the building wall surface 8 by an anchor bolt (not shown). ) Is fixed in the vertical direction, and the connecting bars 10 are arranged at a predetermined pitch along the longitudinal direction to firmly connect the ladder device 3 to the building wall surface 8 in the longitudinal direction.

  The connecting bar 10 has one end connected to the reference-side vertical bar 1A described above and the other end connected to the fixed rail 9 so as to be vertically rotatable. Made rotatable. For this reason, the ladder apparatus 3 can be accommodated along the building wall surface 8 when the connecting bar 10 is in the vertical position, and the ladder apparatus 3 is protruded from the building wall surface 8 when the connection bar 10 is set in the horizontal position. It becomes possible to be in a state. Further, the connecting bar 10 is connected to the ladder bar 2 in a direction orthogonal to the reference side vertical bar 1A. Therefore, the ladder bar 2 rotates vertically in a plane parallel to the building wall surface 8, and the ladder device 3 is connected to the building wall surface 8. Fold and unfold in the direction parallel to.

  The connection position of the connection bar 10 with respect to the reference side vertical bar 1A is adjusted so that the lower end of the reference side vertical bar 1A comes into contact with the ground surface 21 when the connection bar 10 is in a horizontal posture. The same applies to the ladder bar 2, and the connecting positions of the reference side vertical bar 1 </ b> A and the movable side vertical bar 1 </ b> B are adjusted so that the horizontal posture is obtained when the lower ends of both the reference side vertical bar 1 </ b> A and the ground side 21 come into contact.

  Therefore, when the evacuation ladder apparatus is not used, the ladder apparatus 3 is formed in a substantially rod shape by placing the ladder bar 2 in a vertical posture and causing a pair of vertical bars 1 to run along the horizontal direction as shown in FIG. In this state, the connecting bar 10 is placed in a vertical posture, whereby the reference vertical bar 1A overlaps the fixed rail 9 from the front side of the building, and the entire escape ladder device is folded into a bar shape. It is made to be in the state. In this state, the vertical ladders 1A and 1B are restrained by a stopper (not shown) that can be released by the operation unit 23 formed on each floor, so that the evacuation ladder device is maintained in the storage state. Since the ladder device is folded along one side of the window 20 along the building wall surface 8, it does not get in the way when the window 20 is used.

  On the other hand, when a fire or the like occurs, if the stopper is released by operating the operation unit 23 described above, the connecting bar 10 that takes a vertical posture, strictly, an oblique posture, rotates due to the load and the dead weight of the ladder device 3, The ladder device 3, which takes the storage position along the building wall surface 8 at a position slightly higher than the ground 21, is moved obliquely downward until the lower end of the ladder device 3 comes into contact with the ground surface 21 and is moved to a use position protruding from the building wall surface 8. The same applies to the ladder beam 2 until the lower end of the movable side vertical bar 1B that rotates along with the reference side vertical bar 1A at a position slightly higher than the ground surface 21 is rotated by the load and its own weight of the movable side vertical bar 1B. The ladder apparatus 3 is lowered and deformed from the folded position to the deployed position. As described above, when the ladder device 3 takes the use position and the deployed posture, the connecting bar 10 and the ladder beam 2 are in a horizontal posture. In this expanded state, the evacuees only enter the front from the window 20 and face the ladder beam 2 that is directly facing. You can change. Further, when descending along the ladder device 3, the building wall surface 8 is felt on the back side, and fears due to high places can be suppressed, and the load of the evacuees on the ladder device 3 is the ground 21 where the lower end abuts. Further, the wobbling in the horizontal direction is prevented by the link body 10.

  Further, in this embodiment, the evacuation ladder apparatus includes the braking cable 4 and the braking cable storage means 11 for braking the unfolding operation using the above-described own weight, and brakes as the unfolding operation proceeds. The deployment speed is controlled by suppressing the pulling speed of the braking cable 4 that is gradually pulled out from the cable storage means 11. As shown in FIG. 4, the brake cable 4 is formed by continuously connecting a chain 4c to one end of a wire 4b. The wire 4b is connected to the movable vertical bar 1B from the fixed rail 9 via the reference vertical bar 1A. It is routed in an L shape in plan view. The distance between the fixed rail 9 and the reference side vertical bar 1A, and the reference side vertical bar 1A and the movable side vertical bar 1B is such that the ladder device 3 moves from the storage position to the use position, and from the folding position to the deployed position. Since the length gradually increases with the deformation, the pull-out length of the braking cable 4 from the braking cable storage means 11 increases with the deployment operation of the evacuation ladder device. In addition, in FIG. 4 etc., 24 is a pulley for changing the wiring direction of the wire 4b.

  The braking cable storage means 11 includes a storage part 25 for storing the braking cable 4, a biasing means 7 for biasing the braking cable 4 in the retracting direction to the storage part 25, and a pulling direction of the braking cable 4 from the storage part 25. And a buffering means 27 for applying an appropriate load to the movement to the storage section 25. The biasing means 7 makes it easy to pull the braking cable 4 into the storage section 25, and the pulling speed of the stored braking cable 4 from the storage section 25 is increased. It is suppressed by the buffer means 27. In this embodiment, the storage unit 25 is formed by a tubular member 5 having a long space that can store the braking cable 4 in a straight line in the vertical direction, and the above-described fixed rail 9 is formed in a pipe shape. The fixed rail 9 is used. Inside the fixed rail 9, as shown in FIG. 4, the wire 4b and a chain 4c extending from one end thereof are accommodated in the vertical direction from above to below, and the other end of the wire 4b is connected to the movable vertical bar 1B. Fixed.

  In this embodiment, the biasing means 7 is formed by connecting a weight to the storage side end of the brake cable 4, that is, the free end of the chain 4c, as shown in FIGS. The weight 7 disposed inside the fixed rail 9 urges the braking cable 4, that is, the wire 4 b in a direction to draw the fixed rail 9 into the fixed rail 9 by the load.

  As shown in FIGS. 4 and 5, the buffer means 27 is provided with a so-called one-way type rotary damper (damper device 6) that applies a load only in one rotation direction in the fixed rail 9 and is connected to the rotary damper 6. The sprocket 28 is configured to mesh with the chain 4c of the braking cable 4. The rotary damper 6 applies a load to the chain 4c, that is, the braking cable 4 via the sprocket 28 only in the direction in which the rotary damper 6 is pulled out from the storage unit 25. In FIG. 4, reference numeral 29 denotes a shaft holding portion for firmly holding a shaft (not shown) of the rotary damper 6 that engages with the sprocket 28.

  Therefore, as shown in FIG. 3, in the housed state of the evacuation ladder device, the movable side vertical bar 1B and the fixed rail 9 are close to the reference side vertical bar 1A, and the reference side vertical bar 1A is moved from the fixed rail 9 to the reference side vertical bar 1A. As a result, the length of the path extending to the movable vertical bar 1B becomes shorter, so that the wire 4b, that is, the brake cable 4 is in a tension state in which the long extra length portion 4a is drawn into the fixed rail 9 by the weight 7. . Thereafter, as shown in FIG. 3B, when the connecting bar 10 is rotated vertically by the load of the vertical bar 1 and the ladder device 3 is moved from the storage position to the use position while maintaining the folded posture. The wire 4b is pulled out from the fixed rail 9 due to an increase in the distance between the fixed rail 9 and the reference-side vertical bar 1A, and the pulling speed is suppressed by the rotary damper 6, so that the ladder device 3 is moved from the storage position to the use position. The movement is quiet and slow. Further, from this state, when the ladder bar 2 is rotated vertically by the load of the movable vertical bar 1B or the like as shown in FIG. 4 and the ladder device 3 is deformed from the folded position to the deployed position, the reference is similarly applied. The wire 4b is further pulled out from the fixed rail 9 by increasing the distance between the side vertical bar 1A and the movable side vertical bar 1B, and the pulling speed of the wire 4b is suppressed by the rotary damper 6, so that the ladder device 3 is unfolded from the folded posture. The transformation to posture is likewise quiet and slow.

  Further, in this embodiment, the load for rotating the connecting bar 10 from the vertical position to the horizontal position is mainly the reference side vertical bar 1A and the movable side vertical bar 1B, whereas in the case of the ladder bar 2, The point which becomes only the movable side vertical bar 1B, that is, the force that pulls the wire 4b when the ladder device 3 moves from the storage position to the use position is larger than the force when the folding posture is deformed from the folding posture to the deployed posture. In order to eliminate the fact that the movement / deployment speed differs between them, the wiring length of the wire 4b between the reference-side vertical bar 1A taking the use position and the fixed rail 9 is determined by the ladder. It is set longer than the length between the reference-side vertical bar 1A and the movable-side vertical bar 1B in the deployed posture of the device 3. As shown in FIG. 5, the wiring length of the wire 4b can be adjusted by changing the wiring angle of the wire 4b in the vertical direction, that is, by adjusting the inclination of the wire 4b. In the embodiment, the wiring angle θ1 with respect to the horizontal plane between the fixed rail 9 and the reference vertical bar 1A is 60 degrees, and the wiring angle θ2 with respect to the horizontal plane between the reference vertical bar 1A and the movable vertical bar 1B is 30. Set to degrees.

  Therefore, when the ladder device 3 moves from the storage position shown in FIG. 3A to the use position shown in FIG. 3B, the folding device 3 is deformed from the folding posture shown in FIG. The wire 4b has to be pulled out from the fixed rail 9 longer than the case, and the load applied by the rotary damper 6 is increased, so that the difference between the moving speed and the deploying speed due to the load difference is eliminated, and the evacuation ladder device The unfolding operation is smoothed.

  In addition, in this embodiment, the escape ladder apparatus includes a lock bar (cam member 12). As shown in FIG. 6 (a), the lock bar 12 is formed by bending both ends of a metal bar in substantially opposite directions, and a ladder bar corresponding portion 12b is provided at one end of the linear portion 12a and a connecting bar is provided at the other end. Part 12c is formed. The straight portion 12a is formed with a cylindrical attachment portion 12d that is slightly long in the direction orthogonal to the longitudinal direction, and is perpendicular to the reference-side vertical bar 1A by a pin or the like (not shown) inserted into the attachment portion 12d. It is connected rotatably.

  In this embodiment, the lock bar 12 is connected to the lower part of the reference vertical bar 1A, more specifically, as shown in FIG. In the vicinity of the portion to which the bar 10 ′ is connected, the straight portion 12 a is parallel to the ladder bar 2 and connected in the same direction as the ladder bar 2 so as to be vertically rotatable. 6 (b) and FIG. 7 (a), the lock bar 12 has a portion in the vicinity of the connecting bar corresponding portion 12c of the linear portion 12a at the bottom surface of the lowermost connecting bar 10 ′. When the ladder device 3 is moved from the use position to the storage position, the ladder device 3 is brought into contact with the surface in the rotating direction, and at this time, the tip of the opposite ladder beam corresponding portion 12b is almost on the bottom surface of the ladder beam 2 ′ at the second stage from the bottom. Take a position to hit. Therefore, even if it is attempted to rotate the connecting bar 10 'to the vertical position in this state, the counterclockwise rotation of the lock bar 12 around the attachment portion 12d in FIG. Since it is regulated by the contact with the ladder bar 2, the connecting bar 10 ′ cannot rotate, and the ladder device 3 is thereby held in the use position.

  On the other hand, since the contact of the lock bar 12 with the ladder bar 2 ′, which is the second stage from the bottom, is only to the bottom surface of the ladder bar corresponding part 12b as described above, the ladder device 3 is expanded. Rotation of the ladder bar 2 for deforming from the posture to the folded position, that is, the clockwise rotation of the ladder bar 2 ′ in FIG. 6B is allowed. When the ladder bar 2 ′ is rotated clockwise as shown in FIG. 7 (b), the ladder bar corresponding part 12b of the lock bar 12 is now turned into the lowermost ladder bar 2 ″ that rises diagonally by the rotation. It approaches and enters into a locking hole 30 formed in the upper surface of this ladder bar 2 ″. Thereafter, when the ladder beam 2 ″ is further rotated, the ladder beam corresponding portion 12b comes into contact with the bottom wall of the ladder beam 2 ″, and the ladder beam corresponding portion 12b is inclined gently in the rotation direction of the ladder beam 2. As a result, the subsequent rotation of the ladder bar 2 ″ causes a component force in the same rotational direction to act on the lock bar 12 and the lock bar 12 rotates in the same clockwise direction as the rotation direction of the ladder bar 2 ″.

  Due to the rotation of the lock bar 12, the straight portion 12 a is separated from the connection bar 10, and the connection bar corresponding portion 12 c is disposed on the rotation path of the connection bar 10. Therefore, when the connecting bar 10 is rotated in this state, the connecting bar 10 comes into contact with the connecting bar corresponding portion 12c, and the connecting bar corresponding portion 12c is gently inclined in the rotation direction of the connecting bar 10. As the connecting bar 10 rotates, the connecting bar corresponding portion 12c comes into sliding contact with the bottom surface thereof. As shown in FIGS. 8A and 8B, the lock bar 12 is further rotated in the rotation direction of the ladder bar 2 by the sliding contact of the connection bar corresponding part 12c with the connection bar 10, and the ladder bar corresponding part 12b is engaged. The ladder frame 2 ″ is further rotated in the vertical position so as to be locked to the periphery of the stop hole 30. Therefore, even if the ladder frame 2 ″ is returned to the horizontal posture in this state, the ladder frame corresponding portion 12b is not connected to the ladder frame 2. Since the ladder bar 2 "cannot be rotated in the horizontal posture direction because it is locked to" and is not allowed to move in the unlocking direction by the connecting bar 10, the ladder device 3 is held in the folded posture. The

  In addition, the transition from the housed state to the used state of the evacuation ladder device can be performed by a procedure reverse to the above procedure. Therefore, the ladder apparatus 3 that takes the folding position at the storage position by the lock bar 12 that rotates by receiving the rotation of the connection bar 10 and the ladder bar 2 in a specific procedure, It moves to the use position away from the building wall surface 8 as it is, and then, by the rotation of the ladder frame 2, at the position away from the building wall surface 8, it is deformed so as to open in parallel along the building wall surface 8. It is guaranteed. Conversely, when storing the ladder device 3 in the deployed position in the use position in this way, first, the ladder device 3 is folded at a position away from the building wall surface 8 by the rotation of the ladder bar 2, In other words, it is ensured that the ladder device 3 which is folded into a rod shape and then becomes a rod shape by the rotation of the connecting bar 10 comes close to the building wall surface 8. Further, in this stored state, the ladder bar 2 is forcibly rotated in the vertical posture direction by the connecting bar 10, so that the vertical bars 1A and 1B can be closed cleanly without a gap. As shown in this embodiment, the lock bar 12 is not limited to the vicinity of the portion where the second-stage ladder bar 2 ′ and the lowermost-level connection bar 10 ′ are connected to each other. It can be installed in the vicinity of the part where “and the connecting bar 10” are connected.

  FIG. 9 shows a modified example of the brake cable storage means 11 and the brake cable 4 in the present invention described above. In this modification, the same components as those of the above-described embodiment are denoted by the same reference numerals in the drawing, and the description thereof is omitted. In this modification, the buffering means 27 of the braking cable storage means 11 includes a pair of one-way type rotary dampers 6, and the chain 4 c of the braking cables 4 is not engaged with the sprocket 28 connected to the rotary damper 6. A load portion 31 is formed.

  As shown in FIGS. 9A to 9C, the rotary damper 6 is arranged in a vertical direction in a fixed rail 9 (not shown), and the upper damper 6 ′ is moved from the storage position of the ladder device 3 to the use position. Regarding the movement, the lower damper 6 ″ brakes each of the deformations of the ladder device 3 from the folded position to the deployed position. Each damper 6 is used to exhibit a similar braking torque. 9B, 32 is a shaft of the rotary damper 6, 33 is a fixed base for fixing the damper and the shaft holding portion to the fixed rail 9, and 34 is a bolt for fixing the fixed base to the fixed rail 9.

  On the other hand, the no-load portion 31 is formed by attaching a rail 35 having a U-shaped cross section to a specific section of the braking cable 4 instead of the chain 4c. As shown in FIG. 9C, the rail 35 includes a hollow portion 35 a that does not mesh with the teeth of the sprocket 28, and cancels the braking of the wire 4 b by the damper 6. The rail 35 is relatively short in a position corresponding to the upper damper 6 'when the escape ladder device is stored, that is, when the extra length 4a of the wire 4b accommodated in the fixed rail 9 is the longest. The lower damper 6 ″ is disposed with a length corresponding to the section of the chain 4c passing through the lower damper 6 ″ when the ladder device 3 moves from the folding position to the deployed position. Things are arranged.

  Therefore, in this modified example, in the initial movement when the evacuation ladder apparatus in the housed state is deployed, that is, in the early stage of the movement of the ladder apparatus 3 from the housed position to the use position, the upper damper 6 ′ brakes the wire 4 b by the rail 35. Does not function, and only a relatively small load is applied to the wire 4b by the lower damper 6 ″, and the movement operation of the ladder device 3 from the storage position to the use position is started quickly. Next, the upper damper 6 When the wire 4b is pulled out by the length of the rail 35 corresponding to ', the upper and lower dampers 6', 6 "function, and in this state, the ladder device 3 is loaded from the storage position to the use position. Is complete.

  Thereafter, when the ladder device 3 having a relatively small load is deformed from the folded posture to the deployed posture, the unloaded portion 31 corresponds to the lower damper 6 ″, and thereby the ladder device 3 As for the movement from the folding position to the unfolded position, the wire 4b is braked only by the upper damper 6 '. Therefore, by changing the number of the dampers 6 that function according to the load as described above, The speed difference between the movement from the storage position to the use position and the deformation from the folding position to the deployed position is eliminated, and the evacuation ladder device is smoothly deployed from the stored state to the used state.

  In this modified example, the case where the braking by the upper damper 6 ′ at the initial movement is disabled and the braking by the lower damper 6 ″ is disabled when the ladder device 3 is deformed from the folded position to the deployed position is shown. It is sufficient to make the lower damper 6 ″ at the time of initial movement impossible to brake the upper damper 6 ′ at the time of deformation. Further, in addition to the rail 35 described above, the no-load portion 31 can be replaced by a wire or the like as long as it does not mesh with the teeth of the sprocket 28.

  FIG. 10 shows another modification of the buffer means 27 in the present invention. In this modification, the same components as those in the embodiment and the modification described above are denoted by the same reference numerals in the drawing, and description thereof is omitted. In this modification, the no-load part 31 is formed between the rotary damper 6 of the buffer means 27 and the sprocket 28.

  As shown in FIG. 10A, the unloaded portion 31 is provided with a long hole 36 in the braking rotation direction of the sprocket 28 by the damper 6, and a guide pin that moves in the long hole 36 by the rotation of the sprocket 28 from the damper 6. 37 is formed by protruding. As shown in FIGS. 10A and 10B, the guide pin 37 of the damper 6 has the wire 4b in the long hole 36 in the state where the extra length 4a of the wire 4b accommodated in the fixed rail 9 is the longest. In the initial state where the wire 4b moves in the pulling direction, the wire 6b moves in the pulling direction in the wire 4b, and the shaft of the damper 6 is idled between the shaft hole 38 of the sprocket 28. Let

  Therefore, in this modified example, in the initial stage of movement of the ladder device 3 from the storage position to the use position, the load of the damper 6 is not transmitted to the sprocket 28 by the no-load portion 31, and the wire 4 b resists only the load of the weight 7. As a result, the ladder device 3 is pulled out from the fixed rail 9, whereby the movement operation of the ladder device 3 from the storage position to the use position is started quickly. Thereafter, when the guide pin 37 is moved to the end of the long hole 36 in the wire 4b pull-out direction by pulling out the wire 4b, the damper 6 functions thereafter to move the ladder device 3 to the use position or to the deployed posture. The deformation is braked.

  In the above embodiment and modification, the case where the chain 4c is locked to the sprocket 28 of the buffering means 27 to brake the wire 4b of the braking cable 4 has been shown. However, the buffering means 27 is replaced with the sprocket 28. It is also possible to provide a configuration in which a gear is provided on the brake cable 4 and a rack that engages with the gear is provided on the brake cable 4.

It is a perspective view which shows the use condition of the ladder apparatus for evacuation. It is a perspective view which shows the accommodation state of the ladder apparatus for evacuation. It is a figure explaining the expansion | deployment operation | movement of a ladder apparatus, (a) is a perspective view which shows the state which takes a folding posture in a storage position, (b) is a perspective view which shows the state which takes a folding posture in a use position. It is a figure explaining the expansion | deployment operation | movement of a ladder apparatus, and is a perspective view which shows the state which takes a deployment attitude | position in a use position. It is a figure explaining the routing state of a braking cable. It is a figure which shows a lock bar, (a) is a perspective view of single goods, (b) is a front view which shows the attitude | position in the use condition of the evacuation ladder apparatus. It is a figure which shows a lock bar, (a) is a side view which shows the attitude | position in the usage condition of the ladder apparatus for evacuation, (b) is a front view which shows the attitude | position in the middle of the transition from the expansion | deployment attitude | position of a ladder apparatus to a folding attitude | position. . It is a figure which shows a lock bar, (a) is a side view which shows the attitude | position in the accommodation state of the evacuation ladder apparatus, (b) is a front view which shows the attitude | position in the accommodation state of the evacuation ladder apparatus. FIG. 6 is a view showing a modified example of the brake cable storage means and the brake cable, where (a) is a side view showing the state in the fixed rail, (b) is a front view showing the state in the fixed rail, and (c) is the sprocket and rail. It is a principal part enlarged view which shows the engagement state. It is a figure which shows another modification, (a) is a disassembled perspective view which shows the assembly | attachment state of a sprocket and a rotary damper, (b) is a figure explaining the state in a fixed rail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ladder vertical member 1A One of the ladder vertical members 1B The other ladder vertical member 2 Ladder cross member 3 Ladder device 4 Braking line 4a Extra length 5 Tubular member 6 Damper device 7 Energizing means 8 Building wall surface 9 Fixed vertical member 10 Link body 11 Braking cable storage means 12 Cam member

Claims (6)

A ladder device that is formed by connecting both ends of a ladder cross member to a pair of ladder vertical members so as to be vertically rotatable, and is deployed by rotating the ladder cross member vertically to its horizontal position by its own weight,
A braking cable that is routed between the vertical members of the ladder and is inserted into the tubular member that is long in the longitudinal direction of the ladder device, and is pulled out from the tubular member as the ladder device is deployed.
An evacuation ladder apparatus comprising: a damper device housed in the tubular member and connected to an extra length portion of the braking cable, and a damper device that suppresses a pulling speed of the braking cable from the tubular member and reduces a deployment speed of the ladder device. The evacuation ladder apparatus according to claim 1, wherein urging means for urging the braking cable in the retracting direction is disposed inside the tubular member. In the ladder device, one of the ladder vertical members is connected to a tubular fixed vertical member fixed to the wall of the building via a link member that is freely rotatable in the vertical direction. Protruding from the wall,
The escaping ladder device according to claim 1 or 2, wherein the extra length portion of the braking cable and the damper device are accommodated in a fixed vertical member to reduce a deployment speed of the ladder device and a protruding speed from the building wall surface. The ladder vertical member is formed by connecting both ends of a ladder horizontal member to a pair of ladder vertical members so as to be vertically rotatable, and via a link member that is vertically rotatable with respect to a fixed vertical member fixed to a building wall surface. A ladder device that is connected to one another and that is deployed by rotating the ladder cross member and the link body vertically to a horizontal posture by its own weight;
It is routed from the fixed vertical member to one of the ladder vertical members not connected to the link body through one of the ladder vertical members, and the extra length portion is stored by the braking rope storage means, and the braking rope storage is accommodated as the ladder device is deployed. A brake cable drawn out from the brake cable storage means against the damper device formed in the means,
The pulling length of the braking cable between one of the ladder vertical members having a large rotational load and the fixed vertical member is made larger than that between the ladder vertical members to reduce the difference in rotational speed between the link body and the ladder cross member. Evacuation ladder device. It is formed by connecting the ladder cross member vertically and freely to the ladder vertical member that moves between the storage position and the use position by rotating between the vertical posture and the horizontal posture of the link body that is vertically rotatable. ,
An evacuation ladder device in which a cam member that restrains the link body in a horizontal posture of the ladder cross member and holds the ladder vertical member in a use position is rotatably connected to the ladder vertical member. 6. The ladder apparatus for evacuation according to claim 5, wherein the cam member restrains the ladder cross member in a vertical posture at a storage position of the ladder vertical member.

Images