Door ball adjuster for elevator

Abstract

The elevator comprises a plurality of landing doors and a car door, a door knife extending in the height direction is installed at the top of the car door, two door balls arranged at intervals are installed at the top of the side, close to the car door, of each landing door, and the door ball adjuster comprises a base plate extending in the transverse direction; each positioning plate comprises a first side face and a second side face which are opposite in the transverse direction and a third side face and a fourth side face which are opposite in the longitudinal direction, the two ends of the base plate are installed on the two third side faces respectively, and the two first side faces extend in the height direction and face each other; in the process that the door ball adjuster is arranged on the door knife in a sleeving mode and moves in the height direction along with the car door, the door knife is clamped between the two first side faces, and when the door ball adjuster sequentially penetrates through the two door balls on each landing door, the two second side faces make contact with the two door balls correspondingly so that the distance between the two door balls can be adjusted.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to a door-ball adjustment device, and in particular to a door-ball adjuster for an elevator. Background Art

[0002] Elevators are a kind of conveying machinery for carrying people up and down, and are widely used in public places such as shopping malls, subways, and stations. The door balls and door knives are important components for controlling the opening and closing of the elevator's hall door and car door. In the daily use of the elevator, it is usually necessary to regularly adjust the gap between the two door balls on the same hall door. In the prior art, maintenance personnel usually use visual inspection or measurement with a ruler to adjust the gap between the two door balls on the same hall door, thereby adjusting the gap between the two sides of the door knife extending in the horizontal direction and the two door balls on the same hall door.

[0003] However, visual inspection or measurement with a ruler usually results in large errors. Therefore, the existing door ball spacing adjustment method usually results in unequal gaps between the two door balls on each hall door, and when the car door and each hall door are on the same floor, the gaps between one side of the door knife extending in the lateral direction and the door balls on the same side of each hall door are unequal. When any hall door or car door fails, it is necessary to readjust the gaps between the two door balls on all hall doors, resulting in a complicated and time-consuming maintenance process. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides a door ball adjuster for an elevator, in which two first side surfaces of two positioning plates are arranged facing each other, so as to adjust the distance between the two door balls by respectively contacting the two door balls through the two second side surfaces of the two positioning plates.

[0005] According to an embodiment of the utility model, a door-ball adjuster for an elevator is provided, the elevator comprising a plurality of hall doors and a car door, the top of the car door being provided with a door knife extending in a height direction, two door balls arranged at intervals being arranged on the top of each hall door on a side close to the car door, the door-ball adjuster comprising: a base plate extending in a transverse direction; and two positioning plates, each of the positioning plates comprising a first side surface and a second side surface opposite to each other in the transverse direction, and a third side surface and a fourth side surface opposite to each other in the longitudinal direction, the two ends of the base plate being respectively mounted on the two third side surfaces of the two positioning plates, the two first side surfaces of the two positioning plates extending in a height direction and arranged facing each other, so that when the door-ball adjuster is sleeved on the door knife and moves in a height direction with the car door, the door knife is clamped between the two first side surfaces of the two positioning plates, so that when the door-ball adjuster passes between the two door balls on each hall door in turn, the two second side surfaces of the two positioning plates respectively contact the two door balls to adjust the spacing between the two door balls.

[0006] According to an embodiment of the utility model, each of the positioning plates has the shape of an isosceles trapezoid in a plan view, and the long side and the short side of the isosceles trapezoid are respectively located within the first side surface and the second side surface, the sides where the two oblique sides of the isosceles trapezoid are located are used as guide surfaces to guide the goal ball to move to the second side surface, and the two ends of the base plate are respectively installed in the middle part of the two third side surfaces of the two positioning plates, and do not exceed the short side in the lateral direction.

[0007] According to an embodiment of the utility model, each positioning plate is provided with a folded edge extending from the junction of the first side surface and the fourth side surface toward the first side surface of the other positioning plate, and the two sides of the door knife in the longitudinal direction are clamped between the folded edge and the base plate.

[0008] According to an embodiment of the utility model, countersunk holes extending in the transverse direction are respectively arranged on the two guide surfaces of the positioning plate, which are suitable for inserting a screw into each of the countersunk holes when the door ball adjuster is mounted on the door knife, so as to squeeze the two positioning plates respectively on both sides of the door knife extending in the transverse direction.

[0009] According to an embodiment of the utility model, the gate ball adjuster also includes: a back plate, which is suitable for being detachably mounted on the fourth side surfaces of the two positioning plates, and the two sides of the gate knife in the longitudinal direction are clamped between the back plate and the base plate.

[0010] According to an embodiment of the present invention, the substrate is formed as a substantially parallelogram-shaped flat plate.

[0011] According to an embodiment of the utility model, the substrate is tilted so that the top of the positioning plate installed on one side of the substrate is higher in height than the top of the positioning plate installed on the other side of the substrate.

[0012] According to an embodiment of the utility model, the distance between the long side and the short side of one positioning plate is A, and the distance between the long side and the short side of another positioning plate is B, so that the distances between the two sides of the door knife extending in the horizontal direction and the two door balls on the same hall door are A and B respectively.

[0013] According to an embodiment of the utility model, the back plate is configured to be rectangular; and / or the base plate, the back plate and the two positioning plates installed between the base plate and the back plate are connected by bolts.

[0014] According to an embodiment of the utility model, the base plate is respectively connected to the two positioning plates by bolts.

[0015] According to the above-mentioned embodiment of the utility model, the door ball adjuster for elevators is provided by setting a door ball adjuster including a base plate and two positioning plates, wherein the two first side surfaces of the two positioning plates extend in the height direction and are arranged facing each other, so as to adjust the distance between the two door balls by respectively contacting the two door balls through the two second side surfaces of the two positioning plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a plan view of the elevator;

[0017] Figure 2 It is a front view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a first exemplary embodiment of the utility model;

[0018] Figure 3 It is a top view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a first exemplary embodiment of the utility model;

[0019] Figure 4 It is a front view of a door-ball adjuster for an elevator according to a first exemplary embodiment of the utility model;

[0020] Figure 5 is a top view of a door-ball adjuster for an elevator according to a first exemplary embodiment of the utility model;

[0021] Figure 6 is a front view of a door-ball adjuster for an elevator according to a second exemplary embodiment of the utility model;

[0022] Figure 7 is a top view of a door-ball adjuster for an elevator according to a second exemplary embodiment of the utility model;

[0023] Figure 8 It is a front view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a third exemplary embodiment of the utility model;

[0024] Fig. 9 It is a top view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a third exemplary embodiment of the utility model;

[0025] Fig.10 is a front view of a door-ball adjuster for an elevator according to a third exemplary embodiment of the present utility model;

[0026] Fig.11 is a top view of a door-ball adjuster for an elevator according to a third exemplary embodiment of the present utility model;

[0027] Fig.12 is a front view of a door-ball adjuster for an elevator according to a fourth exemplary embodiment of the present utility model; and

[0028] Fig.13 It is a top view of a door-ball adjuster for an elevator according to a fourth exemplary embodiment of the present utility model.

[0029] In the figure:

[0030] 1-hall door; 11-gate ball;

[0031] 2-car door; 21-door knife;

[0032] 3- Goal ball adjuster;

[0033] 31-Substrate;

[0034] 32- positioning plate;

[0035] 321- first side;

[0036] 322- second side;

[0037] 323-third side;

[0038] 324-Fourth side;

[0039] 325-guide surface; 3251-countersunk hole;

[0040] 326-Folding edge;

[0041] 33-Back panel. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] According to the inventive concept of one aspect of the utility model, a door-ball adjuster for an elevator is provided, the elevator comprising a plurality of hall doors and a car door, a door knife extending in a height direction being installed on the top of the car door, two door balls arranged at intervals being installed on the top of a side of each hall door close to the car door, the door-ball adjuster comprising: a base plate extending in a transverse direction; and two positioning plates, each positioning plate comprising a first side surface and a second side surface opposite to each other in the transverse direction, and a third side surface and a fourth side surface opposite to each other in the longitudinal direction, the two ends of the base plate being respectively installed on the two third side surfaces of the two positioning plates, the two first side surfaces of the two positioning plates extending in the height direction and arranged facing each other, so that when the door-ball adjuster is sleeved on the door knife and moves in the height direction with the car door, the door knife is clamped between the two first side surfaces of the two positioning plates, so that when the door-ball adjuster passes between the two door balls on each hall door in turn, the two second side surfaces of the two positioning plates respectively contact the two door balls to adjust the spacing between the two door balls.

[0044] Figure 1 It is a plan view of the elevator; Figure 2 It is a front view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a first exemplary embodiment of the utility model; Figure 3 It is a top view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a first exemplary embodiment of the utility model; Figure 4 It is a front view of a door-ball adjuster for an elevator according to a first exemplary embodiment of the utility model; Figure 5 It is a top view of a door-ball adjuster for an elevator according to a first exemplary embodiment of the utility model.

[0045] According to the exemplary embodiment of the present invention, please refer to Figure 1-Figure 5, a door ball adjuster for an elevator is provided. The elevator includes a plurality of hall doors 1 and a car door 2. A door knife 21 extending in the height direction is installed on the top of the car door 2, and two door balls 11 arranged at intervals are installed on the top of each hall door 1 on the side close to the car door 2. The door ball adjuster 3 includes a base plate 31 and two positioning plates 32. The base plate 31 extends in the transverse direction. Each positioning plate 32 includes a first side surface 321 and a second side surface 322 opposite to each other in the transverse direction, and a third side surface 323 and a fourth side surface 324 opposite to each other in the longitudinal direction. The two ends of the base plate 31 are respectively mounted on the two third side surfaces 323 of the two positioning plates 32. The two first side surfaces 321 of the two positioning plates 32 extend in the height direction and are arranged facing each other, so that when the door ball adjuster 3 is mounted on the door knife 21 and moves in the height direction with the car door 2, the door knife 21 is clamped between the two first side surfaces 321 of the two positioning plates 32, so that when the door ball adjuster 3 passes between the two door balls 11 on each hall door 1 in turn, the two second side surfaces 322 of the two positioning plates 32 respectively contact the two door balls 11 to adjust the distance between the two door balls 11.

[0046] In this embodiment, a gate ball adjuster 3 including a base plate 31 and two positioning plates 32 is provided, wherein the two first side surfaces 321 of the two positioning plates 32 extend in the height direction and are arranged facing each other, so that the distance between the two gate balls 11 can be adjusted by the two second side surfaces 322 of the two positioning plates 32 respectively contacting the two gate balls 11, so as to adjust the distance between the two sides of the door knife 21 extending in the lateral direction and the two gate balls 11 respectively.

[0047] Furthermore, in this embodiment, the door ball adjuster 3 is mounted on the door blade 21, and in the process of moving in the height direction with the car door 2, the door ball adjuster 3 passes between the two door balls 11 on each hall door 1 in turn, and the two second side surfaces 322 of the two positioning plates 32 are in contact with the two door balls 11 respectively to adjust the distance between the two door balls 11. This overcomes the technical defects that the gap between the two door balls on each hall door is usually unequal when the gap between the door balls on each hall door is adjusted by maintenance personnel visually or by measuring with a ruler, and when the car door and each hall door are on the same floor, the gap between the side of the door blade extending in the horizontal direction and the door balls on the same side of each hall door are unequal. When any hall door or car door fails, it is necessary to readjust the gap between the two door balls on all hall doors, and the maintenance process is complicated and time-consuming. This saves maintenance time, is convenient to operate, and reduces the requirements for the skill level of maintenance personnel.

[0048] It should be noted that, in this embodiment, the horizontal direction refers to Figure 4 The left and right directions in the vertical direction refer to Figure 5 The up and down directions in .

[0049] Figure 6 is a front view of a door-ball adjuster for an elevator according to a second exemplary embodiment of the utility model; Figure 7 It is a top view of a door-ball adjuster for an elevator according to a second exemplary embodiment of the utility model.

[0050] In some exemplary embodiments, referring to Figure 4-Figure 7 Each positioning plate 32 has an isosceles trapezoidal shape in a plan view, and the long side and the short side of the isosceles trapezoid are respectively located in the first side 321 and the second side 322, and the side where the two oblique sides of the isosceles trapezoid are located is used as a guide surface 325 to guide the goal ball 11 to move to the second side 322. The two ends of the base plate 31 are respectively installed in the middle of the two third side surfaces 323 of the two positioning plates 32, and do not exceed the short side in the lateral direction.

[0051] Through the above arrangement, when the door ball adjuster 3 passes between the two door balls 11 on each hall door 1 in sequence, the door ball 11 moves to the second side surface 322 under the guidance of the guide surface 325, so that the distance between the door ball 11 and the door blade 21 is adjusted to the distance between the long side and the short side of the isosceles trapezoid in the transverse direction. The guide surface 325 plays a role in making it easier for the door ball adjuster 3 to pass between the two door balls 11 on each hall door 1 in sequence.

[0052] In some exemplary embodiments, referring to Figure 2-Figure 7 Each positioning plate 32 is provided with a folded edge 326 extending from the junction of the first side surface 321 and the fourth side surface 324 toward the first side surface 321 of the other positioning plate 32, and the two sides of the door knife 21 in the longitudinal direction are clamped between the folded edge 326 and the base plate 31.

[0053] Through the above-mentioned arrangement, the two sides of the door knife 21 in the longitudinal direction are clamped between the folded edge 326 and the base plate 31, which on the one hand improves the fit between the door ball adjuster 3 and the door knife 21, and on the other hand improves the verticality of the door ball adjuster 3 after being clamped on the door knife 21.

[0054] In some exemplary embodiments, referring to Figure 2-Figure 7 The two guide surfaces 325 of the positioning plate 32 are respectively provided with countersunk holes 3251 extending in the transverse direction, which are suitable for inserting a screw into each countersunk hole 3251 when the door ball adjuster 3 is mounted on the door knife 21, so as to squeeze the two positioning plates 32 respectively on both sides of the door knife 21 extending in the transverse direction.

[0055] Through the above-mentioned setting method, a screw is penetrated into each countersunk hole 3251, so that the two positioning plates 32 are respectively squeezed on both sides of the door knife 21 extending in the lateral direction, so as to fasten the door ball adjuster 3 to the door knife 21 to prevent the door ball adjuster 3 from falling off during the process of moving along the height direction with the door knife 21.

[0056] It should be noted that see Figure 4-Figure 7 In this embodiment, the gate ball adjuster for elevators of the first exemplary embodiment and the second exemplary embodiment are compared, and the difference is that: the base plate 31 of the gate ball adjuster for elevators of the first exemplary embodiment is tilted in the form of low on the left side and high on the right side, so that the top of the positioning plate 32 located on the left side of the base plate 31 is lower than the top of the positioning plate 32 located on the right side of the base plate 31 in the height direction. The base plate 31 of the gate ball adjuster for elevators of the second exemplary embodiment is tilted in the form of high on the left side and low on the right side, so that the top of the positioning plate 32 located on the left side of the base plate 31 is higher than the top of the positioning plate 32 located on the right side of the base plate 31 in the height direction. The rest of the similarities are not repeated.

[0057] Figure 8 It is a front view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a third exemplary embodiment of the utility model; Fig. 9 It is a top view of a door ball adjuster, a door knife and a door ball for an elevator after being assembled according to a third exemplary embodiment of the utility model; Fig.10 is a front view of a door-ball adjuster for an elevator according to a third exemplary embodiment of the present utility model; Fig.11 is a top view of a door-ball adjuster for an elevator according to a third exemplary embodiment of the present utility model; Fig.12 is a front view of a door-ball adjuster for an elevator according to a fourth exemplary embodiment of the present utility model; Fig.13 It is a top view of a door-ball adjuster for an elevator according to a fourth exemplary embodiment of the present utility model.

[0058] In some exemplary embodiments, referring to Figure 8-Figure 13 The door ball adjuster 3 further includes a back plate 33. The back plate 33 is suitable for being detachably mounted on the fourth side surfaces 324 of the two positioning plates 32, and the two sides of the door blade 21 in the longitudinal direction are clamped between the back plate 33 and the base plate 31.

[0059] Through the above-mentioned arrangement, the two sides of the door knife 21 in the longitudinal direction are clamped between the back plate 33 and the base plate 31 to fix the door ball adjuster 3 on the outside of the door knife 21 to prevent the door ball adjuster 3 from falling off during the movement along the height direction with the door knife 21.

[0060] It should be noted that, in this embodiment, referring to Figure 4-Figure 5 as well as Figure 10-11 , comparing the door ball adjuster for elevators of the first exemplary embodiment and the third exemplary embodiment, the difference is that: the door ball adjuster for elevators of the first exemplary embodiment is provided with a folded edge 326 extending from the junction of the first side surface 321 and the fourth side surface 324 toward the first side surface 321 of another positioning plate 32, and countersunk holes 3251 extending in the transverse direction are respectively provided on the two guide surfaces 325, so as to realize that the door ball adjuster 3 is fixedly sleeved on the outside of the door blade 21. The door ball adjuster for elevators of the third exemplary embodiment is provided with a back plate 33 detachably mounted on the fourth side surfaces 324 of the two positioning plates 32, so as to clamp the two sides of the door blade 21 in the longitudinal direction between the back plate 33 and the base plate 31, so as to realize that the door ball adjuster 3 is fixedly sleeved on the outside of the door blade 21. The rest of the similarities are not repeated.

[0061] Further, in this embodiment, referring to Figure 10-13 , comparing the door-ball adjusters for elevators of the third exemplary embodiment and the fourth exemplary embodiment, the difference is that: the base plate 31 and the back plate 33 of the door-ball adjuster for elevators of the third exemplary embodiment are both tilted in the form of low on the left side and high on the right side, so that the top of the positioning plate 32 located on the left side of the base plate 31 is lower than the top of the positioning plate 32 located on the right side of the base plate 31 in the height direction, wherein the lower right corner of the back plate 33 exceeds the right edge of the positioning plate 32 located on the right side of the base plate 31. The base plate 31 and the back plate 33 of the door-ball adjuster for elevators of the fourth exemplary embodiment are both tilted in the form of high on the left side and low on the right side, so that the top of the positioning plate 32 located on the left side of the base plate 31 is higher than the top of the positioning plate 32 located on the right side of the base plate 31 in the height direction, wherein the upper right corner of the back plate 33 exceeds the right edge of the positioning plate 32 located on the right side of the base plate 31. The rest of the similarities are not repeated.

[0062] In some exemplary embodiments, referring to Figure 2-Figure 13 The substrate 31 is formed as a substantially parallelogram-shaped flat plate.

[0063] In some exemplary embodiments, referring to Figure 2-Figure 13 The substrate 31 is tilted so that the top of the positioning plate 32 installed on one side of the substrate 31 is higher in height than the top of the positioning plate 32 installed on the other side of the substrate 31.

[0064] Through the above arrangement, on the one hand, when the door ball adjuster 3 is mounted on the door blade 21, the guide surface 325 of the positioning plate 32 can be in contact with the door ball 11 during the process of the door ball adjuster 3 moving along the height direction with the door blade 21, which is beneficial to improve the spacing adjustment accuracy between the two door balls 11 on each hall door 1. On the other hand, by changing the relative positions of the two positioning plates 32 in the height direction, it is convenient to adapt to different models of elevators, thereby improving the universal applicability of the door ball adjuster 3.

[0065] In some exemplary embodiments, referring to Figure 2-Figure 13 The distance between the long side and the short side of one positioning plate 32 is A, and the distance between the long side and the short side of the other positioning plate 32 is B, so that the distances between the two sides of the door blade 21 extending in the horizontal direction and the two door balls 11 on the same hall door 1 are A and B respectively.

[0066] Through the above arrangement, the distances between the two sides of the door blade 21 extending in the lateral direction and the two door balls 11 on the same hall door 1 can be adjusted respectively.

[0067] In some exemplary embodiments, referring to Figure 8-Figure 13 The back plate 33 is configured in a rectangular shape. The base plate 31, the back plate 33 and two positioning plates 32 installed between the base plate 31 and the back plate 33 are bolted together.

[0068] In some exemplary embodiments, referring to Figure 2-Figure 13 The base plate 31 is respectively connected with the two positioning plates 32 by bolts.

[0069] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A door ball adjuster for an elevator, the elevator comprising a plurality of hall doors (1) and a car door (2), the top of the car door (2) being provided with a door knife (21) extending in a height direction, and the top of each hall door (1) on a side close to the car door (2) being provided with two door balls (11) arranged at intervals, characterized in that: The gate ball adjuster (3) comprises: a substrate (31) extending in a lateral direction; and Two positioning plates (32), each of the positioning plates (32) includes a first side surface (321) and a second side surface (322) opposite to each other in the transverse direction, and a third side surface (323) and a fourth side surface (324) opposite to each other in the longitudinal direction, the two ends of the base plate (31) are respectively mounted on the two third side surfaces (323) of the two positioning plates (32), the two first side surfaces (321) of the two positioning plates (32) extend in the height direction and are arranged facing each other, so that when the door ball adjuster (3) is mounted on the door knife (21) and moves in the height direction with the car door (2), the door knife (21) is clamped between the two first side surfaces (321) of the two positioning plates (32), so that when the door ball adjuster (3) passes between the two door balls (11) on each of the hall doors (1) in turn, the two second side surfaces (322) of the two positioning plates (32) contact the two door balls (11) respectively to adjust the distance between the two door balls (11).

2. The door ball adjuster for elevator according to claim 1, wherein: Each positioning plate (32) has an isosceles trapezoidal shape in a plan view, and the long side and the short side of the isosceles trapezoid are respectively located in the first side surface (321) and the second side surface (322), and the side surface where the two hypotenuses of the isosceles trapezoid are located is used as a guide surface (325) to guide the goal ball (11) to move to the second side surface (322). The two ends of the base plate (31) are respectively mounted at the middle of the two third side surfaces (323) of the two positioning plates (32), and do not extend beyond the short side in the lateral direction.

3. The door ball adjuster for elevator according to claim 1, wherein: Each of the positioning plates (32) is provided with a folded edge (326) extending from the junction of the first side surface (321) and the fourth side surface (324) toward the first side surface (321) of the other positioning plate (32), and the two sides of the door knife (21) in the longitudinal direction are clamped between the folded edge (326) and the base plate (31).

4. The door ball adjuster for elevator according to claim 2, wherein: The two guide surfaces (325) of the positioning plate (32) are respectively provided with countersunk holes (3251) extending in the transverse direction, which are suitable for inserting a screw into each of the countersunk holes (3251) when the door ball adjuster (3) is mounted on the door knife (21) to squeeze the two positioning plates (32) respectively on both sides of the door knife (21) extending in the transverse direction.

5. The door ball adjuster for elevator according to claim 1, wherein: The gate ball adjuster (3) also includes: The back plate (33) is suitable for being detachably mounted on the fourth side surfaces (324) of the two positioning plates (32), and the two sides of the door blade (21) in the longitudinal direction are clamped between the back plate (33) and the base plate (31).

6. The door ball adjuster for elevator according to claim 2, wherein: The base plate (31) is formed as a substantially parallelogram-shaped flat plate.

7. The door-ball adjuster for an elevator according to claim 6, wherein: The base plate (31) is arranged tilted so that the top of the positioning plate (32) installed on one side of the base plate (31) is higher in height than the top of the positioning plate (32) installed on the other side of the base plate (31).

8. The door-ball adjuster for an elevator according to claim 6, wherein: The distance between the long side and the short side of one positioning plate (32) is A, and the distance between the long side and the short side of another positioning plate (32) is B, so that the distances between the two sides of the door blade (21) extending in the transverse direction and the two door balls (11) on the same hall door (1) are A and B respectively.

9. The door-ball adjuster for an elevator according to claim 5, wherein: The back plate (33) is configured in a rectangular shape; and / or, The base plate (31), the back plate (33), and the two positioning plates (32) installed between the base plate (31) and the back plate (33) are connected by bolts.

10. The door-ball adjuster for an elevator according to any one of claims 1 to 9, wherein: The base plate (31) is respectively connected to the two positioning plates (32) by bolts.

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