JPH0542279U - Manual unlocking device for elevator hall doors - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a manual unlocking device for an elevator landing door that does not require an unlocking hole in the landing door, can be safely operated by an unlocking operator, and is difficult to be tampered with. [Structure] From the gap between the side frame of the three-way landing frame and the landing door 3,
The unlocking key is inserted and the unlocking lever 44 is moved to the right in FIG. Then, the lever 42 connected to the unlocking lever 44 rotates counterclockwise about the shaft 43. Thereby, the unlocking bracket 27 fixed to the engaging member 21.
Is pushed leftward, the engaging member 21 rotates clockwise around the shaft 22. Therefore, the engagement between the claw portion 24 of the engaging member 21 and the engaging portion 12 is released, and the hall door 3 is unlocked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an elevator door unlocking device, and more particularly, to an improvement of a manual unlocking device that manually releases the elevator door from the landing side during maintenance and inspection of the elevator or in an emergency. is there.

[0002]

[Prior Art]

 An example of a conventional elevator door will be described with reference to the drawings. FIG. 5 is a longitudinal sectional view of a main part of a conventional elevator door, and FIG. 6 is a view of the hall door of FIG. 5 viewed from the hoistway side. In the figure, 1 is a hall, 2 is a three-way frame, 3 is a hall door, 4 is an elevator car, and 5 is a car door. In this conventional device, each door 3, 5 is a two-door central opening. There is. 6 is a header fixed to the upper part of the landing 1, 7 is a hanger rail fixed to the header 6, 8 is a door hanger fixed to the upper end of the landing door 3, 9 is a hanger rail pivotally attached to the door hanger 8. -A hanger roller that rolls on the reel 7.

Reference numeral 10 is a switch box fixed to the header 6, and has electrical contacts 11 built therein. Reference numeral 12 is an engaging portion which is a part of the outer frame of the switch box 10. Reference numeral 20 is a bracket fixed to the door hanger 8, 21 is an engaging member pivotally attached to the bracket 20 by a shaft 22, and a contact portion 23 and a claw portion 24 are formed at one end. Reference numeral 25 is a first engagement roller axially attached to the engagement member 21, and 26 is a second engagement roller provided coaxially with the shaft 22. 27 is an unlocking bracket fixed to the engaging member 21, 28 is a compression spring provided between the engaging member 21 and the bracket 20, 29 is an unlocking hole provided in the landing door 3, and 30 is It is an unlocking key used for manual unlocking.

Next, the operation of this conventional device will be described. When the hall door 3 is closed, as shown in FIG. 6, the claw portion 24 engages with the engaging portion 12 to mechanically prevent the hall door 3 from opening. Further, the electrical contact 11 is short-circuited by the contact portion 23.

When the car 4 stops at the hall 1 and starts opening the car door 5, a door opening / closing device (not shown) of the car 4 sandwiches the first and second engagement rollers 25 and 26 from both sides. Therefore, the engagement member 21 rotates in the clockwise direction in FIG. 6 around the shaft 22 (second engagement roller 26) against the spring 28 via the first engagement roller 25. .. As a result, the contact portion 23 separates from the electrical contact 11, and the claw portion 24 and the engaging portion 12 are disengaged. Then, the landing door 3 opens together with the car door 5. When closing, the operation is the reverse of the above. Although not shown, the left and right landing doors 3, 3 are connected by a rope or a chain so that both landing doors 3, 3 can be opened and closed in conjunction with each other.

Next, when opening the landing door 3 from the landing 1 at the time of maintenance and inspection or in an emergency, the unlocking key 30 is inserted into the unlocking hole 29 of the landing door 3 from the landing 1, and the unlocking bracket 27 is pushed. increase. As a result, the engaging member 21 rotates clockwise around the shaft 22, the contact portion 23 separates from the electrical contact 11, and the claw portion 24 and the engaging portion 12 disengage from each other, so that the landing door Can open three.

[0007]

[Problems to be solved by the device]

 However, in this conventional device, since the unlocking hole 29 has to be formed in the hall door 3, there is a problem that not only the manufacturing cost of the hall door 3 is high, but also the design is not preferable. Further, since the unlocking hole 29 is arranged at the upper end portion of the hall door 3, the operator unlocks the hall door 3 in an unstable posture to open the hall door 3. Therefore, if the car 4 is not stopped at the hall 1, the operator may accidentally fall into the hoistway. Further, if a stick or the like is inserted into the unlocking hole 29 by mischief, the hall door 3 may be unlocked. The present invention has been made to solve these problems, and provides a manual unlocking device for elevator hall doors that is easy to operate and that does not easily unlock the hall doors by mischief. The purpose is to do.

[0008]

[Means for Solving the Problems]

 The present invention is designed to unlock the hall door 3 by utilizing the gap between the hall three-way frame 2 and the hall door 3, and the manual unlocking device is configured so as not to reach the above gap. The character-shaped unlocking key is used to operate the manual unlocking device through the gap to unlock the landing door 3.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 is a view corresponding to FIG. 6, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1, and FIG. 4 is an operation explanatory view of the present embodiment. In the figure, reference numeral 40 denotes a gap between the surface 3a of the hall door 3 and the side frame 2a of the hall three-way frame 2, which is generally 6 mm or less. Reference numeral 41 is a bracket fixed to the landing door 3, 42 is a lever pivotally mounted on the bracket 41 by a shaft 43, 44 is an unlocking lever connected to the lever 42 by a shaft 45, and one end is attached to the tension spring 46. Thus, the operation piece 47 is formed so as to be connected to the bracket 41 and bent at the other end so as to face the opening direction end surface 3b of the hall door 3.

A guide hole 48 is formed in the operation piece 47, and the operation piece 47 does not reach the gap 40, as shown in FIG. Reference numeral 49 is a guide pin that penetrates through the guide hole 48 and is planted on the end face 3b of the landing door 3 in the opening direction. The middle portion is smaller than the diameter of the guide hole 48, and the head portion is larger than the diameter of the guide hole 48. It is configured so that the operation piece 47 cannot be pulled out. A spacer 49a is formed at the base of the guide pin 49 to maintain a predetermined gap between the operation piece 47 and the open end surface 3b of the landing door 3. Reference numeral 50 is an unlocking key whose front end is bent at a right angle to form an unlocking piece 51.

When performing the unlocking operation in the device of this embodiment, the unlocking key 50 is inserted into the gap 40 at a position above the operation piece 47 with the unlocking piece 51 standing upright. Next, the unlocking piece 51 is rotated 90 degrees in the X direction in FIG. 4 to lower the unlocking key 50, and the unlocking key 50 is inserted between the open end surface 3b of the landing door 3 and the operation piece 47. When the leading end of the unlocking piece 51 hits the spacer 49a (two-dot chain line in FIG. 2), the unlocking key 50 is pushed in the Y direction in FIGS. 2 and 4 (the opening direction of the hall door 3). As a result, the unlocking lever 44 moves to the right in FIG. 1, and accordingly, the lever 42 rotates about the shaft 43 in the counterclockwise direction to move the unlocking bracket 27 to the left. Press to. Therefore, the engagement member 21 rotates clockwise around the shaft 22 to unlock the door.

As described above, according to this embodiment, since it is not necessary to provide the unlocking hole in the hall door 3, the manufacturing cost of the hall door 3 is not increased, and the design is not damaged. Further, since the unlocking position is lower than that in the case of FIG. 6, the unlocking operation can be performed in a stable posture. Furthermore, since the operation piece 47 does not reach the gap 40, even if a rod-shaped object is inserted into the gap 40 by mischief, the door will not be unlocked.

In the above description, the unlocking key 50 is inserted into the gap 40 from a position above the operating piece 47, but the unlocking operation is performed by inserting it from a position below the operating piece 47. You can go. Further, in order to smooth the operation when the lever 42 pushes the unlocking bracket 27 to the left, a roller or the like is provided on the lever 42 side of the portion where the lever 42 and the unlocking bracket 27 are in contact, or on the unlocking bracket 27 side. It may be provided. Further, instead of forming the spacer 49a on the guide pin 49, a spacer having a hole through which the guide pin 49 penetrates may be fixed to the operation piece 47. Furthermore, in the above description, the device using the two engaging rollers 21 and 26 as the landing door opening / closing device is shown, but the invention is not limited to this, and the landing door is opened by rotating the lever 42. Any structure may be used as long as it can be unlocked.

In the above-mentioned embodiment, the description has been given to the two-door central opening door, but it can be applied to the four or more central opening doors in the same manner, and to the single-opening door as well. can do. In the case of a single door and a single door, it can be considered that there is only the right door in FIG. Further, in the case of a two-seat door, since the lock device is usually provided on the high speed side door, in FIG. This is exactly the same as the above-mentioned embodiment. That is, the unlocking key 50 is inserted only in the gap between the high-speed landing door and the low-speed landing door, and the outside is exactly the same.

[0015]

[Effect of the device]

 As described above, according to the present invention, since it is not necessary to provide an unlocking hole in the hall door, the hall door manufacturing cost is not increased, and the hall door design is not damaged. Moreover, since the unlocking position is lower than the conventional position, the operator can perform the unlocking operation in a relatively stable posture. Further, since the operation piece of the unlocking lever does not reach the gap between the side frame of the three-way landing frame and the landing door, there is no fear that the unlocking operation is performed by mischief.

[Brief description of drawings]

FIG. 1 is an overall schematic view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an operation explanatory diagram of an embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part of a conventional elevator door.

FIG. 6 is a view of a conventional landing door viewed from the hoistway side.

[Explanation of symbols]

 2 three-way landing frame 2a three-sided landing frame 3 landing door 3a landing door surface 3b landing door end face 12 engaging portion 21 engaging member 30, 50 unlocking key 40 gap 42 lever 44 unlocking lever 47 operation Piece

Claims (1)

[Scope of utility model registration request] 1. A lock provided for locking and unlocking in conjunction with the opening and closing operation of a car door of an elevator and having a locking device configured to be unlocked by a manual operation, the lock being fixed on the landing side. A mating portion, an engaging member that is installed on the landing door side so as to be able to engage with this engaging portion, and that locks the landing door by engaging with the engaging portion, and that is rotatable to the hoistway side of the landing door. The lever, which is pivotally mounted and rotates to rotate the engaging member to unlock the landing door, has an L-shaped cross section, and one of which faces the opening end face of the landing door with a gap and It has an operation piece formed on the hoistway side of the surface of the landing door, and the other has an unlocking lever pivotally attached to one end of the lever, and the end portion is L-shaped and the side frame of the landing box A gap with the hall door or a hall door slower than the hall door While being inserted into the gap with the landing door, it is inserted into the gap between the end face in the opening direction of the landing door and the operation piece by rotating, and the operation piece is displaced in the opening direction of the landing door to cause the solution. A manual unlocking device for an elevator hall door, comprising a lock lever and an unlocking key for unlocking the hall door via the lever.