JP6968030B2 - Elevator car safety fence - Google Patents

Description

This disclosure relates to an elevator car safety fence.

When the maintenance work of the elevator is performed in the work area on the car, a safety fence is provided around the work area to ensure the safety of the maintenance workers. The safety fence may be a specification that is fixed on the car and always has a constant fence height, and is a specification that raises the fence height required for maintenance work at a low fence height under normal operating conditions of the elevator. May be. In Patent Document 1, a safety fence is formed by a horizontal member connecting the tops of vertical members that are vertically moved by interpolating rods provided on the left and right outer walls and the back outer wall of the car door and sliding in contact with each other. An example of changing the fence height by moving the material up and down is described. In Patent Document 2, a plurality of fence bases are erected on the upper beam of the car, and the upper parts of the plurality of fence bases are connected by a handrail on the car to form a safety fence, and the fence base is in an upright state with respect to the upper beam. An example is described in which the height of the fence is changed between the standing state and the folded state. The safety fence needs to have the strength necessary for ensuring the safety of maintenance workers, and a metal pipe such as iron or an angle material formed into a predetermined shape is used.

Japanese Unexamined Patent Publication No. 2002-145545 Japanese Unexamined Patent Publication No. 2012-041167

When a maintenance worker performs maintenance work on the hoistway on the elevator car, a part of the body such as a hand may be put out of the safety fence. A balanced weight with a large mass is arranged in the hoistway, but depending on the content of maintenance work, the balanced weight may come near the top of the car. If for some reason the maintenance worker was caught between the safety fence and the counterweight, the safety fence had sufficient rigidity to ensure safety and the entire weight of the maintenance worker was applied. Since it has strength that does not deform or break to some extent, it may damage the body of maintenance workers. Therefore, even if a maintenance worker is caught between the safety fence and the counterweight, there is a demand for a safety fence on the car of an elevator that can safely protect the maintenance worker.

The safety fence on the car of the elevator according to the present disclosure is a safety fence provided on the car of the car and surrounding the work area for maintenance work on the car, and a plurality of fences erected on the car. It is equipped with a base and a car railing section that connects the tops of multiple fence bases, and when a maintenance worker is sandwiched between the balance weight of the elevator and the car railing section and receives external force, the maintenance worker A predetermined safety external force value is predetermined as a range to be safely protected, and when an external force exceeding the predetermined safety external force value is received, a part of the part connecting the adjacent fence bases is part of the car upper handrail part. It falls off or breaks and separates.

Since the car upper handrail portion of the safety fence has sufficient rigidity for ensuring safety, for example, the maintenance worker does not deform or damage the car upper handrail portion to the extent that the entire weight is applied to the car upper handrail portion for maintenance work. The mass of the counterweight is about the same as the mass of the car and much larger than the mass equivalent to the weight of the maintenance worker. Therefore, when a maintenance worker is sandwiched between a highly rigid safety fence and a counterweight, a large load is applied to the handrail of the car via the maintenance worker, but if the safety fence is rigid, it may be deformed. It will not be damaged and will continue to pinch maintenance workers. According to the above configuration, when an external force exceeding a predetermined safety external force value is applied to the car upper handrail portion, a part of the portion connecting the adjacent fence bases is dropped or damaged and separated. The predetermined safety external force value is a predetermined external force as a range in which the maintenance worker is safely protected when the maintenance worker is sandwiched between the balance weight of the elevator and the handrail part of the car and receives the external force. The value. As a result, even if a maintenance worker is caught between the safety fence and the balance weight, a part of the car upper handrail part of the safety fence will fall off or be damaged. The situation where the maintenance worker is pinched is eliminated, and the maintenance worker can be safely protected.

In the car safety fence of the elevator of the present disclosure, the car upper handrail portion is configured by sequentially connecting a plurality of joint portions at the adjacent fence bases, and the joint portion is provided at one end of the joint main body portion and is provided in the vertical direction. It has an extending rail groove and a fitting portion provided at the other end of the joint main body portion and extending in the vertical direction corresponding to the groove shape of the rail groove. The fitting portion of the other end of the joint portion on one side is fitted and connected to the rail groove at one end with a predetermined fitting force, and the predetermined fitting force is applied between the two joint portions in the connected state. When an external force in the vertical direction exceeding the safe external force value is received, it is preferable to set the size so that the fitting portion slides in the vertical direction from the rail groove and falls off.

According to the above configuration, the car upper handrail portion is configured by connecting a plurality of joint portions that are fitted to each other with a predetermined fitting force. Here, the predetermined fitting force slips off the fitting portion from the rail groove in the vertical direction when an external force in the vertical direction exceeding a predetermined safety external force value is received between the two joint portions in a connected state. It is set to the size to be used. The predetermined safety external force value is a predetermined external force as a range in which the maintenance worker is safely protected when the maintenance worker is sandwiched between the balance weight of the elevator and the handrail part of the car and receives the external force. The value. As a result, even if a maintenance worker is caught between the safety fence and the balance weight, a part of the car upper handrail part of the safety fence will fall off, so maintenance will be performed between the car upper handrail part and the balance weight. The situation where workers are pinched is eliminated, and maintenance workers can be safely protected.

In the car safety fence of the elevator of the present disclosure, the car upper handrail portion is configured by sequentially connecting a plurality of joint portions at the adjacent fence bases, and the joint portion is composed of a columnar joint main body portion and a joint main body portion. It has a fitting ball seat recess provided at one end and a fitting ball provided at the other end of the joint body portion and can be fitted into the fitting ball seat recess, and the other in two adjacent joint portions. The fitting ball at the other end of the one-sided joint is fitted and connected to the fitting ball seat recess at one end of the side joint with a predetermined fitting force, and the predetermined fitting force is 2 in the connected state. It is preferable that the size is set so that the fitting ball falls off from the fitting ball seat recess when an external force exceeding a predetermined safety external force value is received between the two joint portions.

According to the above configuration, the car upper handrail portion includes a fitting ball seat recess provided at one end of the columnar main body portion and a fitting ball provided at the other end and capable of being fitted into the fitting ball seat recess. It is configured by connecting a plurality of joint portions that are fitted to each other with a predetermined fitting force. Here, the predetermined fitting force is set to a size at which the fitting ball falls off from the fitting ball seat recess when an external force exceeding a predetermined safety external force value is received between the two joint portions in the connected state. Will be done. The predetermined safety external force value is a predetermined external force as a range in which the maintenance worker is safely protected when the maintenance worker is sandwiched between the balance weight of the elevator and the handrail part of the car and receives the external force. The value. As a result, even if a maintenance worker is caught between the safety fence and the balance weight, a part of the car upper handrail part of the safety fence will fall off, so maintenance will be performed between the car upper handrail part and the balance weight. The situation where workers are pinched is eliminated, and maintenance workers can be safely protected.

In the car upper safety fence of the elevator of the present disclosure, the car upper handrail portion extends vertically in the extending direction of the car upper handrail portion at the adjacent fence base, and has a plurality of cut portions having a predetermined cutting depth in the vertical direction. Is composed of a plate member provided on the upper surface side or the lower surface side, and the predetermined cutting depth is the plate member at the cut portion when the plate member receives an external force in the vertical direction exceeding a predetermined safety external force value. Is preferably set to a depth at which it breaks and separates.

According to the above configuration, the car upper handrail portion is provided with a plurality of cut portions having a predetermined cutting depth on the upper surface side or the lower surface side, which extend perpendicularly to the extending direction of the car upper handrail portion at the adjacent fence base. It is composed of the board members. Here, the cutting depth is set to a size at which the plate member is damaged and separated at the cutting portion when the plate member receives an external force in the vertical direction exceeding a predetermined safety external force value. The predetermined safety external force value is a predetermined external force as a range in which the maintenance worker is safely protected when the maintenance worker is sandwiched between the balance weight of the elevator and the handrail part of the car and receives the external force. The value. As a result, even if a maintenance worker is caught between the safety fence and the balance weight, a part of the car upper handrail part of the safety fence will be damaged and separated. The situation where maintenance workers are caught between them is eliminated, and maintenance workers can be safely protected.

According to the safety fence on the car of the elevator having the above configuration, even if the maintenance worker is caught between the safety fence and the counterweight, the maintenance worker can be safely protected.

It is a figure which shows the state which the maintenance worker is performing maintenance work on the car safety fence of the elevator which concerns on embodiment. It is a perspective view which shows the car provided with the car safety fence of the elevator which concerns on embodiment. FIG. 2 is a diagram showing a positional relationship between a maintenance worker and a counterweight by extracting a portion of a safety fence on a car of an elevator according to an embodiment from FIG. 2. It is an enlarged view of the car upper handrail part of FIG. FIG. 3 is a diagram showing a state in which a part of the car upper handrail portion falls off when an external force exceeding a predetermined safety external force value is applied to the car upper handrail portion. It is a figure which shows the example of the car upper handrail part different from FIG. It is an enlarged view of the car upper handrail part of FIG. It is a figure which shows the example of the car upper handrail part different from FIG. 3 and FIG. It is an enlarged view of the car upper handrail part of FIG. It is a figure which shows an example of the structure of the car upper handrail part of FIG.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. In the following, the case where the height of the safety fence is always constant is described, but this is an example for explanation. Depending on the specifications of the elevator, it may be possible to change the fence height to different depending on the normal operating state and the maintenance work state of the elevator. The shapes, numbers, etc. described below are examples for explanation, and can be changed as appropriate according to the specifications of the safety fence of the elevator. In the following, similar elements are designated by the same reference numerals in all drawings, and duplicate description will be omitted.

FIG. 1 shows the overall configuration of the elevator 10. The elevator 10 is provided with a safety fence 50 on the car. Hereinafter, unless otherwise specified, the "safety fence on the elevator car" is referred to as a safety fence 50. The elevator 10 uses a hoistway 12 that penetrates the building 8 in the vertical direction, puts passengers from the landing 24 on each floor on the car 30, and moves up and down in the hoistway 12 according to the passenger's request. It is a passenger carrier that lands on the landing 24 and unloads passengers.

A machine room 14 is provided at the uppermost part of the hoistway 12. A hoisting machine 16 and a control device 18 are installed in the machine room 14. The hoisting machine 16 is composed of an electric motor that winds up or rewinds the main rope 20 under the control of the control device 18. One end of the main rope 20 is connected to the car 30 and the other end is connected to the counterweight 22. The balance weight 22 has a mass set in proportion to the mass of the car 30, whereby the load on the hoist 16 is reduced. The safety fence 50 is a fence provided around the work area when the maintenance work of the elevator 10 is performed in the work area on the car. FIG. 1 shows a maintenance worker 6 who is not a component of either the elevator 10 or the safety fence 50 but is performing maintenance work in the work area on the car. The safety fence 50 is provided to protect the maintenance worker 6 who performs maintenance work on the car from falling or the like.

In FIG. 1, the vertical direction, the depth direction, and the width direction that are orthogonal to each other are shown. In the vertical direction, the hoistway 12 extends, the direction toward the upper floors of the building 8 is the upper side, and the direction toward the lower floors is the lower side. The depth direction is parallel to the direction connecting the landing 24 of the building 8 and the hoistway 12, the direction of the landing 24 as seen from the car 30 is the landing side, and the direction of the hoistway 12 opposite to the landing side is. It is on the hoistway side. The hoistway side is the back side of the car 30. In the example of FIG. 1, the counterweight weight 22 moves up and down inside the hoistway 12 on the back side of the car 30. The width direction corresponds to the width direction of the landing door in the landing 24, and the right direction is the right side and the left direction is the left side from the landing 24 toward the hoistway 12. The same applies to the following figure.

FIG. 2 is a perspective view showing the car 30 extracted. The car 30 includes a car room 32 for accommodating passengers, a lower frame 34 for supporting the car room 32 from below, an upper frame 36 for arranging the car room 32 on the upper side, and a car room 32. A pair of vertical columns 38 connecting the lower frame 34 and the upper frame 36 on both sides in the width direction are included. A car door 42 is provided on the landing side of the car chamber 32, and a door opening / closing mechanism 40 is provided on the upper side of the car door 42. The door opening / closing mechanism 40 is a mechanism for opening and closing the car door 42 when the car 30 lands on the desired landing 24, and the landing door provided in the landing 24 also opens and closes together with the car door 42.

The safety fence 50 has a plurality of fence bases 52, 54, 56, 58 standing upright on the upper frame 36 on the car and having a constant height, and the tops of the plurality of fence bases 52, 54, 56, 58. Includes the handrail portion 60 of the basket to be tied. In the example of FIG. 2, the car upper handrail portion 60 is a three-way handrail connecting the tops of the four fence bases 52, 54, 56, 58. The three-way handrail is composed of a left handrail portion 62 connecting the tops of the fence bases 52 and 54, a right handrail portion 64 connecting the tops of the fence bases 56 and 58, and a back handrail portion 66 connecting the tops of the fence bases 54 and 56. Will be done.

In the above, the plurality of fence bases 52, 54, 56, 58 are erected on the upper frame 36, but this is an example for explanation, and a plurality of fence bases 52, 54, 56, 58 may be placed on the car even if they are not on the upper frame 36. Fence bases 52, 54, 56, 58 may be erected. For example, an upper beam or an upper plate may be provided on the car, and a plurality of fence bases 52, 54, 56, 58 may be erected on the upper beam or the upper plate. In the above, the car upper handrail portion 60 is used as an entrance / exit for the maintenance worker 6 without providing a handrail on the landing side, but a landing side handrail portion connecting the tops of the fence bases 52 and 58 may be provided as a four-way handrail. ..

The back handrail portion 66 is a handrail portion of a portion connecting adjacent fence bases 54 and 56, and a collision protection handrail portion 70 is provided in a part thereof. The length of the portion connecting the adjacent fence bases 54 and 56 is close to the length in the width direction of the car 30, but this is the length of the balance weight 22 along the width direction of the car 30. Shorter than. The length of the collision protection handrail portion 70 is set to a length close to the length of the counterweight weight 22 along the width direction of the car 30. As an example of the dimensions, assuming that the length of the car 30 in the width direction is about 2 m and the length of the counterweight weight 22 along the width direction of the car 30 is about 1 m, the collision protection handrail portion 70 is included. The total length of the rear handrail portion 66 is about 2 m, and the length of the collision protection handrail portion 70 is about 1 m.

Of the car upper handrail portion 60, the portion other than the collision protection handrail portion 70 is made of a metal pipe such as iron or an angle material molded into a predetermined shape, and has sufficient rigidity for ensuring safety. .. For example, if the maintenance worker 6 puts the entire weight on the handrail portion 60 of the car for maintenance work, it will not be deformed or damaged. The portions other than the collision protection handrail portion 70 are the left and right side portions of the collision protection handrail portion 70 in the left handrail portion 62, the right handrail portion 64, and the rear handrail portion 66. Therefore, even if the maintenance worker 6 leans over the outside of the safety fence 50 for maintenance work and puts the entire weight on the car upper handrail portion 60, if it is a part other than the collision protection handrail portion 70, it is on the car. The handrail portion 60 is neither deformed nor damaged. Even if the maintenance worker 6 is sandwiched between the balance weight 22 and the car upper handrail portion 60 other than the collision protection handrail portion 70, the car upper handrail portion 60 is not deformed or damaged, so maintenance is performed. The worker 6 will continue to be sandwiched between the balance weight 22 and the car upper handrail portion 60. This can damage the maintenance worker 6.

The elevator 10 has a predetermined safety external force as a range in which the maintenance worker 6 is safely protected when the maintenance worker 6 is sandwiched between the balance weight 22 of the elevator 10 and the handrail portion 60 of the car and receives an external force. The value F0 is predetermined. When the collision protection handrail portion 70 receives an external force F having a magnitude exceeding a predetermined safety external force value F0, all or part of the collision protection handrail portion 70 falls off or is damaged and separates.

The mass of the counterweight 22 is almost the same as the mass of the car 30, and is much larger than the mass corresponding to the weight of the maintenance worker 6. When the maintenance worker 6 is sandwiched between the car upper handrail portion 60 and the counterweight 22 of the safety fence 50, it is much larger than when the maintenance worker 6 puts the entire weight on the car upper handrail portion 60. An external force is applied to the car handrail portion 60 via the maintenance worker 6. When the magnitude of the external force F received by the car upper handrail unit 60 exceeds a predetermined safety external force value F0 when the maintenance worker 6 is sandwiched between the car upper handrail unit 60 and the counterweight weight 22, the collision protection handrail unit 70 All or part of it falls off or breaks and separates. When the elevator 10 is in operation for maintenance work, a detection unit for detecting that a part of the collision protection handrail unit 70 has fallen off or is damaged is provided, and the operation of the elevator 10 is stopped according to the detection of the detection unit. Is preferable.

The predetermined safety external force value F0 is determined from the viewpoint of protection of the maintenance worker 6 when the maintenance worker 6 is sandwiched between the balance weight 22 and the car upper handrail portion 60. When the maintenance worker 6 is sandwiched between the car upper handrail portion 60 and the balancing weight 22, for example, the maintenance worker 6 hits the balancing weight 22 during the maintenance work on the car and the car upper handrail. This is a case where the entire weight is hung on the portion 60 and the vehicle collides with the portion 60. Collision acceleration is sometimes greater than gravitational acceleration. Therefore, the predetermined safety external force value F0 is set to a value sufficiently larger than the external force received when the maintenance work is performed in the work area of the safety fence 50. For example, the value is set to be larger than the external force received when the maintenance worker 6 puts the entire weight on the handrail portion 60 of the car. Assuming that the mass corresponding to the average weight of the maintenance worker 6 is 60 kg, the value is larger than the weight of 60 kg obtained by multiplying the mass of 60 kg by the gravitational acceleration. For example, it weighs 100 kg. This is an example for explanation, and may be set to a value other than this from the safety performance of the elevator 10 or the handrail portion 60 of the car.

In the above, the collision protection handrail portion 70 is provided in a part of the rear handrail portion 66, which is an example for explanation when the balance weight 22 moves up and down in the hoistway 12 on the back side of the car 30. Is. Depending on the specifications of the elevator 10, the balance weight 22 moves up and down in the hoistway 12 on the left side or the right side in the width direction of the car 30. In this case, the collision protection handrail portion 70 is provided on a part of the left handrail portion 62 or the right handrail portion 64.

FIG. 3 is an enlarged view of a portion of the safety fence 50 of FIG. 2 extracted. The collision protection handrail portion 70 is provided as a part of the back handrail portion 66 connecting the adjacent fence bases 54 and 56. The collision protection handrail portion 70 is configured by sequentially connecting a plurality of joint portions 72. In the example of FIG. 3, five joint portions 72 are sequentially connected to form a collision protection handrail portion 70. FIG. 3 shows the positional relationship between the maintenance worker 6 in the work area of the safety fence 50 and the balance weight 22 with respect to the safety fence 50.

FIG. 4 is an enlarged view of the joint portion 72 constituting the collision protection handrail portion 70. FIG. 4A is a diagram showing three joint portions 72, 72, 72 connected adjacently to each other. (B) is a case where an external force F exceeding a predetermined safety external force value F0 is applied in the vertical direction to one of the three joint portions 72, 72, 72 in (a) from the connected state. It is a figure which shows one joint part 72 which fell off.

The joint portion 72 corresponds to the groove shape of the rectangular parallelepiped joint main body 74, the rail groove 76 provided at one end of the joint main body 74 and extending in the vertical direction, and the rail groove 76 provided at the other end of the joint main body 74. A fitting portion 78 extending in the vertical direction is included. Then, in the two adjacent joint portions 72, 72, the fitting portion 78 at the other end of the joint portion 72 on one side is fitted into the rail groove 76 at one end of the joint portion 72 on the other side with a predetermined fitting force. Will be connected. When the predetermined fitting force receives an external force F exceeding the predetermined safety external force value F0 between the two joint portions 72, 72 in the connected state, the fitting portion 78 slides in the vertical direction from the rail groove 76. It is set to the size that it will fall off.

In FIG. 5, the maintenance worker 6 hits the counterweight 22 for some reason during the maintenance work in the state of FIG. 3, and collides with the collision protection handrail portion 70, which is a part of the rear handrail portion 66, with the entire weight. It is a figure which shows the case which is sandwiched between a collision protection handrail portion 70, and a balance weight 22. Since the collision protection handrail portion 70 receives an external force F exceeding a predetermined safety external force value F0, three joint portions 72, 72, 72 out of the five joint portions 72 connected are dropped downward from the connected state. And it is scattered on the basket. The remaining two joint portions 72, 72 are displaced downward from the connected state with the rear handrail portion 66 and are about to come off. As a result, the collision protection handrail portion 70 is separated from the connected state, and the state in which the maintenance worker 6 is sandwiched between the collision protection handrail portion 70, which is a part of the rear handrail portion 66, and the balance weight 22 is eliminated. The maintenance worker 6 is released from the pinched state and is safely protected.

In the collision protection handrail portion 70, there is a directional tendency for the joint portion 72 to fall off from the connected state. The direction in which the joint portion 72 falls off is the direction in which the rail groove 76 extends and is the vertical direction. Since the connecting force is sufficiently strong in the width direction or the depth direction orthogonal to the vertical direction, the joint portion 72 does not fall off from the connected state even if an external force F exceeding a predetermined safety external force value F0 is received.

Whether or not the fitting force of the collision protection handrail portion 70 has a predetermined fitting force is determined on one side of the rail groove 76 at one end of the other side joint portion 72 in the two adjacent joint portions 72, 72. It can be confirmed by measuring the pushing force when fitting the fitting portion 78 at the other end of the joint portion 72.

FIG. 6 is a diagram showing a safety fence 50 provided with a collision protection handrail portion 80 different from the collision protection handrail portion 70 of FIG. The collision protection handrail portion 80 is provided as a part of the back handrail portion 66 connecting the adjacent fence bases 54 and 56. The collision protection handrail portion 80 is configured by sequentially connecting a plurality of joint portions 82. In the example of FIG. 6, five joint portions 82 are sequentially connected to form a collision protection handrail portion 80.

FIG. 7 is an enlarged view of the joint portion 82 constituting the collision protection handrail portion 80. FIG. 7A is a diagram showing three joint portions 82, 82, 82 connected adjacently to each other. (B) is a case where an external force F exceeding a predetermined safety external force value F0 is applied in the vertical direction to one of the three joint portions 82, 82, 82 in (a) from the connected state. It is a figure which shows one joint part 82 which fell off.

The joint portion 82 is provided in a columnar joint main body portion 84, a fitting ball seat recess 86 provided at one end of the joint main body portion 84, and a fitting ball seat recess 86 provided at the other end of the joint main body portion 84. Includes a fitting ball 88 that can be fitted. Then, in the two adjacent joint portions 82, 82, the fitting ball 88 at the other end of the one-sided joint portion 82 has a predetermined fitting force in the fitting ball seat recess 86 at one end of the other side joint portion 82. It is fitted and connected. When the predetermined fitting force receives an external force F exceeding a predetermined safety external force value F0 between the two joint portions 82, 82 in the connected state, the fitting ball 88 falls off from the fitting ball seat recess 86. Set to size.

In the collision protection handrail portion 80, there is no directionality in the detachment of the joint portion 82 from the connected state. Regardless of whether the direction of the external force F is the vertical direction, the width direction, or the depth direction, when the external force F exceeds a predetermined safety external force value F0, the joint portion 82 falls off from the connected state.

Whether or not the fitting force of the collision protection handrail portion 80 has a predetermined fitting force is determined on one side of the fitting ball seat recess 86 of the other side joint portion 82 in the two adjacent joint portions 82, 82. It can be confirmed by measuring the pushing force when fitting the fitting ball 88 at the other end of the joint portion 82.

FIG. 8 is a diagram showing a safety fence 50 provided with a collision protection handrail portion 90 different from the collision protection handrail portion 70 of FIG. 3 and the collision protection handrail portion 80 of FIG. The collision protection handrail portion 90 is provided as a part of the back handrail portion 66 connecting the adjacent fence bases 54 and 56. The collision protection handrail portion 90 is a plate member and has a plurality of cut portions 92 on the lower surface side. In the example of FIG. 8, four notches 92 are provided, and the plate member is divided into five parts. Each portion is in a state where the cut portion 92 on the upper surface side is connected to each other at a portion where the cut portion 92 does not extend.

FIG. 9 is a partially enlarged view of the collision protection handrail portion 90. FIG. 9A is a diagram showing three portions 94, 94, 94 of the five portions divided by the cut portion 92 in the plate member constituting the collision protection handrail portion 90. In (b), when an external force F exceeding a predetermined safety external force value F0 is applied in the vertical direction to one of the three portions 94, 94, 94 in (a), it is damaged from the connected state and separated. It is a figure which shows one part 94.

The collision protection handrail portion 90 is a plate member provided with a plurality of cut portions 92 having a predetermined cut depth d0 in the vertical direction and a predetermined cut width W0 in the width direction on the lower surface side. The plate member is a plate member extending in the width direction connecting the adjacent fence bases 54 and 56, and the plurality of cut portions 92 extend in the depth direction perpendicular to the extending width direction of the plate member and extend from the lower surface side. It has a vertical notch toward the top surface side. The predetermined cutting depth d0 is set to a depth at which the plate member is damaged and separated at each cutting portion 92 when the plate member receives an external force F in the vertical direction exceeding a predetermined safety external force value F0. It is set. The pitch along the width direction of the plurality of cut portions 92 is P0, and the length of the separated portions 94 in the width direction is (P0-d0). In FIG. 9, a plurality of cut portions 92 are provided on the lower surface side of one plate member, but in some cases, a plurality of cut portions 92 may be provided on the upper surface side of one plate member.

In the collision protection handrail portion 90, there is a direction when the connected state is damaged and the portion 94 is separated. The direction in which the portion 94 is separated is a direction perpendicular to the extending direction of the cut portion 92 and is a vertical direction. In the width direction or the depth direction orthogonal to the vertical direction, the connecting force is sufficiently strong, so that the connected state is not damaged even if an external force F exceeding a predetermined safety external force value F0 is received.

Whether or not the cutting depth of the collision protection handrail portion 90 is a predetermined cutting depth d0 can be determined by separating the connected state even if a predetermined safety external force value F0 is applied to the plate member of the collision protection handrail portion 90. However, it can be confirmed that the connected state is separated when an external force F exceeding a predetermined safety external force value F0 is applied.

In FIG. 9, a plurality of cut portions 92 are provided by cutting a predetermined cut depth d0 and a predetermined cut width W0 into one plate member, but the thickness of the plate member is t0. As a result, a thin plate having a plate thickness of (t0-d0) can be used to eliminate the cutting process.

FIG. 10 is a diagram showing a method of obtaining a collision protection handrail portion 100 which has the same function as the collision protection handrail portion 90 and does not require cutting. 10 (a) is an overall view of the collision protection handrail portion 100, and FIGS. 10 (b), (c), and (d) are views showing each element constituting the collision protection handrail portion 100.

In order to obtain the collision protection handrail portion 100, first, the left end member 102 and the right end member 104 shown in FIG. 10B are prepared. Since the left end member 102 and the right end member 104 have an outer shape symmetrical to each other, the left end member 102 will be described. The left end member 102 has a portion having a plate thickness of t0 and a portion having a plate thickness of d0, and there is a plate thickness step of (t0−d0) between the two portions.

Next, the thin plate 106 shown in FIG. 10 (c) is prepared. The plate thickness of the thin plate 106 is (t0-d0), and the length of the thin plate 106 is substantially the same as the total length of the collision protection handrail portion 100. Then, a portion of the left end member 102 having a plate thickness of d0 is applied to the left end of the thin plate 106, and the thin plate 106 is integrated by adhesion or the like. Similarly, a portion of the right end member 104 having a plate thickness of d0 is applied to the right end of the thin plate 106 and integrated by adhesion or the like. In the state of being integrated by adhesion, the upper surface of the portion where the plate thickness of the left end member 102 is d0, the upper surface of the thin plate 106, and the upper surface of the portion where the plate thickness of the right end member 104 is d0 are the same plane.

Next, four rectangular plate members 108 shown in FIG. 10D are prepared. The dimension of the rectangular plate member 108 in the longitudinal direction is (P0-W0). P0 is the pitch along the width direction of the plurality of cut portions 92 in the collision protection handrail portion 90 described with reference to FIG. 9, and W0 is the cut width of the plurality of cut portions 92. Then, four rectangular plate members 108 are arranged on the lower surface side of the thin plate 106 integrated with the left end member 102 and the right end member 104 with a gap of W0 from each other, and integrated by adhesion or the like.

In this way, the collision protection handrail portion 100 shown in FIG. 10A is obtained. According to this method, since the cut depth d0 can be controlled by the plate thickness of the rectangular plate member 108, it is not necessary to process a plurality of cut portions 92 while controlling the cut depth d0 in the plate member. By this method, it is possible to obtain a collision protection handrail portion 100 equivalent to the collision protection handrail portion 90 that requires cutting.

According to the safety fence 50 on the car of the elevator including the collision protection handrail portions 70, 80, 90, 100 having the above configuration, even if the maintenance worker 6 is sandwiched between the safety fence 50 and the balance weight 22 The maintenance worker 6 can be safely protected.

6 maintenance workers, 8 buildings, 10 elevators, 12 hoistways, 14 machine rooms, 16 hoisting machines, 18 controls, 20 main ropes, 22 balance weights, 24 landings, 30 cars, 32 car rooms, 34 Lower frame, 36 upper frame, 38 vertical pillars, 40 door opening / closing mechanism, 42 car door, 50 (on the car of the elevator) safety fence, 52, 54, 56, 58 fence base, 60 car upper handrail part, 62 left handrail part , 64 Right handrail, 66 Back handrail, 70, 80, 90, 100 Collision protection handrail, 72 Joint (of collision protection handrail 70), 74 (Collision protection handrail 70) Joint body, 76 rails Groove, 78 Fitting, 82 Joint (of collision protection handrail 80), 84 Joint body (of collision protection handrail 80), 88 Fitting ball, 92 Notch, 94, 102 Left end member, 104 Right end member, 106 thin plate, 108 rectangular plate material.

Claims (4)

A safety fence that is installed on the car and surrounds the work area for maintenance work on the car.
Multiple fence bases erected on the car and
A handrail on the car that connects the tops of the multiple fence bases,
Equipped with
A predetermined safety external force value is predetermined as a range in which the maintenance worker is safely protected when the maintenance worker is sandwiched between the balance weight of the elevator and the handrail portion of the car and receives an external force. ,
The handrail part of the car is
An elevator car safety fence in which a part of the part connecting the adjacent fence bases is dropped or damaged and separated when an external force exceeding a predetermined safety external force value is received. The handrail part of the car is
A plurality of joints are sequentially connected and configured at the adjacent fence bases.
The joint portion is
A rail groove provided at one end of the joint body and extending in the vertical direction,
A fitting portion provided at the other end of the joint body portion and extending in the vertical direction corresponding to the groove shape of the rail groove,
Have,
In the two adjacent joint portions, the fitting portion at the other end of the joint portion on one side is fitted and connected to the rail groove at one end of the joint portion on the other side with a predetermined fitting force.
When the predetermined fitting force receives an external force in the vertical direction exceeding the predetermined safety external force value between the two joint portions in a connected state, the fitting portion slides in the vertical direction from the rail groove. The safety fence on the elevator car according to claim 1, which is set to a size that allows it to fall off. The handrail part of the car is
A plurality of the joint portions are sequentially connected and configured at the adjacent fence bases.
The joint portion is
Cylindrical joint body and
With the fitting ball seat recess provided at one end of the joint body,
A fitting ball provided at the other end of the joint body and capable of being fitted into the fitting ball seat recess.
Have,
In the two adjacent joint portions, the fitting ball at the other end of the joint portion on one side is fitted into the fitting ball seat recess at one end of the joint portion on the other side with a predetermined fitting force and connected. Being done
The predetermined fitting force is such that the fitting ball falls off from the fitting ball seat recess when an external force exceeding a predetermined safety external force value is received between the two joint portions in a connected state. The safety fence on the car of the elevator according to claim 1, which is set in. The handrail part of the car is
At the adjacent fence base, a plurality of cut portions extending vertically in the extending direction of the car upper handrail portion and having a predetermined cut depth in the vertical direction are composed of plate members provided on the upper surface side or the lower surface side. ,
The predetermined depth of cut is set to a depth at which the plate member is damaged and separated at the cut portion when the plate member receives an external force in the vertical direction exceeding a predetermined safety external force value. The safety fence on the elevator car according to claim 1.

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