Landing door upper sill connecting structure

Abstract

The utility model relates to a landing door upper sill connecting structure. The landing door upper sill connecting structure comprises a first connecting mechanism and a second connecting mechanism, the first connecting mechanism is used for being installed on a hoistway front wall, and a first gap is formed between the first end of the landing door upper sill and the hoistway front wall through the first connecting mechanism; the first adjusting assembly is arranged between the first end of the landing door upper sill and the first connecting mechanism, and the first connecting mechanism is connected with the hoistway front wall through the first adjusting assembly so as to adjust the distance of the first gap; and the second connecting mechanism is used for being installed on the hoistway front wall, and the second end of the landing door upper sill is connected with the hoistway front wall through the second connecting mechanism. By adjusting the distance of the first gap, the relative position between the first end of the landing door upper sill and the hoistway front wall can be adjusted, so that the landing door upper sill can adapt to the civil engineering deviation of the hoistway front wall, and the landing door upper sill can adapt to hoistway front walls with different civil engineering deviations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator installation, in particular to a landing door upper sill connecting structure. BACKGROUND

[0002] With the continuous increase of elevator ownership and the extension of elevator service life, the demand for after-market services such as updating and reconstruction is rapidly released. When upgrading and reconstructing old elevators, since the landing door frame is usually closely connected with the decoration of the building, retaining its use can avoid damaging the original decoration of the building floor waiting hall, reduce the fire operation during construction, and shorten the construction period. The landing door upper sill, as a moving wear part, needs to be replaced to reduce operating noise and reduce operating failures.

[0003] In related technologies, the landing door upper sill is usually connected with the landing door frame or the shaft front wall.

[0004] However, since there are different civil deviations in the shaft front wall, the landing door upper sill usually does not match when installed, and there will be on-site cutting operations, which will affect the installation efficiency. CONTENT OF THE UTILITY MODEL

[0005] Therefore, it is necessary to provide a landing door upper sill connecting structure for the problem that the landing door upper sill does not match the shaft front wall.

[0006] A landing door upper sill connecting structure, the landing door upper sill connecting structure comprising:

[0007] A first connecting mechanism for mounting on the shaft front wall, a first end of the landing door upper sill forms a first gap with the shaft front wall through the first connecting mechanism;

[0008] A first adjusting assembly arranged between the first end of the landing door upper sill and the first connecting mechanism, the first connecting mechanism is connected with the shaft front wall through the first adjusting assembly to adjust the distance of the first gap;

[0009] A second connecting mechanism for mounting on the shaft front wall, a second end of the landing door upper sill is connected with the shaft front wall through the second connecting mechanism.

[0010] In one of the embodiments, the first connecting mechanism comprises a first connecting piece and a first mounting piece, the first mounting piece is used to fix the first connecting piece on the shaft front wall.

[0011] In one of the embodiments, the first connecting piece comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are fixedly connected and arranged at an angle;

[0012] The first adjusting assembly comprises a first sliding groove and a second sliding groove, the first sliding groove is arranged on the first connecting plate, and the second sliding groove is arranged on the second connecting plate;

[0013] When the first end of the layer door upper sill is slidably connected to the first sliding groove, the first mounting member is connected to the second connecting plate, so that the first gap has a first adjusting range;

[0014] When the first end of the layer door upper sill is slidably connected to the second sliding groove, the first mounting member is connected to the first connecting plate, so that the second gap has a second adjusting range;

[0015] The first adjusting range and the second adjusting range are different.

[0016] In one embodiment, the second connecting mechanism comprises a second connecting member and a second mounting member, and the second mounting member is used to mount the second connecting member to the shaft front wall.

[0017] In one embodiment, the second connecting member comprises:

[0018] A layer door connecting portion is arranged on a side away from the shaft front wall;

[0019] A wall connecting portion is arranged on a side close to the shaft front wall, and the second mounting member is used to mount the wall connecting portion to the shaft front wall.

[0020] An intermediate portion is arranged between the layer door connecting portion and the wall connecting portion.

[0021] The layer door connecting portion, the intermediate portion and the wall connecting portion are sequentially connected to form a bending structure.

[0022] In one embodiment, the second end of the layer door upper sill forms a second gap with the shaft front wall through the second connecting member.

[0023] The layer door upper sill connecting structure further comprises a second adjusting assembly, the second adjusting assembly is arranged between the second end of the layer door upper sill and the second connecting member, and the second connecting member is connected to the shaft front wall through the second adjusting assembly to adjust the distance of the second gap.

[0024] In one embodiment, the second adjusting assembly comprises:

[0025] A first adjusting rod, a first through hole is arranged on the layer door connecting portion, and the first adjusting rod passes through the second end of the layer door upper sill and the first through hole;

[0026] A first fixing member is used to fix one end of the first adjusting rod passing through the first through hole.

[0027] In one of the embodiments, the second adjusting assembly further comprises a locking member, which is arranged on the first adjusting rod and between the upper ledge of the landing door and the first through hole, and one side of the locking member abuts against the upper ledge of the landing door.

[0028] In one of the embodiments, the second adjusting assembly further comprises a gasket, which is arranged on the first adjusting rod, and two sides of the gasket abut against the upper ledge of the landing door and the second connecting mechanism respectively.

[0029] In one of the embodiments, the intermediate part is provided with a second through hole, and the second adjusting assembly comprises a second adjusting rod and a second fixing member, the second adjusting rod passes through the upper ledge of the landing door and the second through hole, and the second fixing member is used to fix one end of the adjusting member passing through the second through hole.

[0030] The above-mentioned upper ledge connecting structure, one end of the first connecting mechanism is fixedly connected to the shaft front wall, the first end of the upper ledge is connected to the first connecting mechanism through the first adjusting assembly, the first end of the upper ledge and the shaft front wall form a first gap through the first connecting mechanism and the first adjusting assembly, and the second end of the upper ledge is connected to the shaft front wall through the second connecting mechanism. The first adjusting assembly can adjust the distance of the first gap, and by adjusting the distance of the first gap, the relative position between the first end of the upper ledge and the shaft front wall can be adjusted, so that the upper ledge can adapt to the civil deviation of the shaft front wall, and the upper ledge can adapt to the shaft front wall with different civil deviations. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic view of the overall structure of the upper ledge connecting structure in one embodiment of the present application.

[0032] Figure 2 It is a schematic view of the overall structure of the second connecting member in one embodiment of the present application.

[0033] Figure 3 It is a front view of the first connecting mechanism and the second connecting mechanism in one embodiment of the present application.

[0034] Figure 4 It is a side view of the second adjusting assembly in one embodiment of the present application.

[0035] Figure 5 It is a side view of the second adjusting assembly in another embodiment of one embodiment of the present application.

[0036] Figure 6 It is a side view of the gasket in one embodiment of the present application.

[0037] Figure 7 Figure 6 is a side view of the second adjusting rod in an embodiment of the present application.

[0038] Reference signs:

[0039] 10, first connecting mechanism; 11, first connecting piece; 111, first connecting plate; 112, second connecting plate; 12, first mounting piece;

[0040] 20, first adjusting assembly; 201, first sliding groove; 202, second sliding groove;

[0041] 30, second connecting mechanism; 31, second connecting piece; 311, layer door connecting part; 3111, first through hole;

[0042] 312, wall body connecting part; 313, intermediate part; 3131, second through hole; 32, second mounting piece;

[0043] 40, shaft way front wall;

[0044] 50, layer door upper sill;

[0045] 60, second adjusting assembly; 601, first adjusting rod; 602, first fixing piece; 603, locking piece; 604, gasket; 605, second adjusting rod; 606, second fixing piece. DETAILED DESCRIPTION

[0046] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those described herein without departing from the spirit of the present application. It is therefore intended that the present application not be limited to the embodiments disclosed herein for purposes of craftsmanship.

[0047] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In addition, if there are these terms "first", "second", these terms are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one feature. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In the present application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixation" and the like, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration, and do not represent the only implementation.

[0052] Reference Figure 1 , Figure 1 The overall structure of the layer door upper ridge connection structure in an embodiment of the present application is shown. The layer door upper ridge connection structure provided by the embodiment of the present application comprises:

[0053] The first connecting mechanism 10 is used for being mounted on the shaft front wall 40, and the first end of the landing door upper sill 50 forms a first gap with the shaft front wall 40 through the first connecting mechanism 10.

[0054] The first adjusting assembly 20 is arranged between the first end of the landing door upper sill 50 and the first connecting mechanism 10, and the first connecting mechanism 10 is connected with the shaft front wall 40 through the first adjusting assembly 20 to adjust the distance of the first gap.

[0055] The second connecting mechanism 30 is used for being mounted on the shaft front wall 40, and the second end of the landing door upper sill 50 is connected with the shaft front wall 40 through the second connecting mechanism 30.

[0056] In the embodiment, one end of the first connecting mechanism 10 is fixedly connected on the shaft front wall 40, the first end of the landing door upper sill 50 is connected with the first connecting mechanism 10 through the first adjusting assembly 20, the first end of the landing door upper sill 50 and the shaft front wall 40 form the first gap through the first connecting mechanism 10 and the first adjusting assembly 20, and the second end of the landing door upper sill 50 is connected with the shaft front wall 40 through the second connecting mechanism 30. The first gap can be zero. The first adjusting assembly 20 can adjust the distance of the first gap, and by adjusting the distance of the first gap, the relative position between the first end of the landing door upper sill 50 and the shaft front wall 40 can be adjusted, so that the landing door upper sill 50 can adapt to the civil deviation of the shaft front wall 40, and the landing door upper sill 50 can adapt to the shaft front wall 40 with different civil deviations.

[0057] Specifically, the first connecting mechanism 10 includes the first connecting piece 11 and the first mounting piece 12, and the first mounting piece 12 is used for fixing the first connecting piece 11 on the shaft front wall 40. The first connecting mechanism 10 includes the first connecting piece 11 and the first mounting piece 12, and the first mounting piece 12 is an expansion bolt or a chemical anchor bolt, etc. The first mounting piece 12 fixes the first connecting piece 11 on the shaft front wall 40, and the first connecting piece 11 is connected with the first end of the landing door upper sill 50, so that the first end of the landing door upper sill 50 is arranged to be spaced apart from the shaft front wall 40 through the first connecting piece 11 and the first mounting piece 12, and the landing door upper sill 50 can adapt to the shaft front wall 40 with different civil deviations.

[0058] Further, the first connecting piece 11 includes the first connecting plate 111 and the second connecting plate 112, and the first connecting plate 111 and the second connecting plate 112 are fixedly connected and arranged at an angle.

[0059] The first adjusting assembly 20 includes the first sliding groove 201 and the second sliding groove 202, the first sliding groove 201 is arranged on the first connecting plate 111, and the second sliding groove 202 is arranged on the second connecting plate 112.

[0060] When the first end of the layer door upper ridge 50 is slidingly connected to the first sliding groove 201, the first mounting member 12 is connected to the second connecting plate 112, so that the first gap has a first adjustment range;

[0061] When the first end of the layer door upper ridge 50 is slidingly connected to the second sliding groove 202, the first mounting member 12 is connected to the first connecting plate 111, so that the second gap has a second adjustment range;

[0062] The first adjustment range and the second adjustment range are different.

[0063] In the embodiment, the first adjustment range and the second adjustment range are different, and the first adjustment range is greater than the second adjustment range, or the second adjustment range is greater than the first adjustment range. Taking the case that the first adjustment range is greater than the second adjustment range as an example, when the first gap needs a larger adjustment range, the second connecting plate 112 is connected to the shaft front wall 40 through the first mounting member 12, and the first connecting plate 111 is slidingly connected to the first end of the layer door upper ridge 50 through the first sliding groove 201, so that the first end of the layer door upper ridge 50 can have a larger gap with the shaft front wall 40, and adapt to a larger civil deviation. Similarly, when the first gap needs a smaller adjustment range, the first connecting plate 111 is connected to the shaft front wall 40 through the first mounting member 12, and the second connecting plate 112 is slidingly connected to the first end of the layer door upper ridge 50 through the second sliding groove 202, so that the first end of the layer door upper ridge 50 can have a smaller gap with the shaft front wall 40, and adapt to a smaller civil deviation. Through the above setting, the first connecting plate 111 or the second connecting plate 112 can be flexibly selected to be connected to the second end of the layer door upper ridge 50 according to the civil deviation of the shaft front wall 40, and different shaft front walls 40 can be adapted.

[0064] Specifically, as shown in Figure 2 and Figure 3 The second connecting mechanism 30 includes a second connecting member 31 and a second mounting member 32, and the second mounting member 32 is used to mount the second connecting member 31 to the shaft front wall 40. The second mounting member 32 is an expansion bolt or a chemical anchor bolt, and the second mounting member 32 fixes the second connecting member 31 on the shaft front wall 40, so that the second connecting member 31 can be connected to the second end of the layer door upper ridge 50.

[0065] Further, the second connecting member 31 includes:

[0066] a layer door connecting portion 311, which is arranged on a side away from the shaft front wall 40;

[0067] a wall body connecting portion 312, which is arranged on a side close to the shaft front wall 40, and the second mounting member 32 is used to mount the wall body connecting portion 312 to the shaft front wall 40;

[0068] The middle part 313 is disposed between the door connection part 311 and the wall connection part 312;

[0069] The door connecting part 311, the middle part 313 and the wall connecting part 312 are connected in sequence to form a bent structure.

[0070] In this embodiment, as Figure 2 As shown, the second connector 31 includes a landing door connector 311, a wall connector 312, and a middle part 313. The landing door connector 311 is used to connect to the second end of the landing door sill 50, and the wall connector 312 is used to connect to the front wall 40 of the shaft. The landing door connector 311, the wall connector 312, and the middle part 313 are connected in sequence to form a bent structure. The landing door connector 311 and the wall connector 312 are arranged parallel to each other. The middle part 313 allows there to be a certain distance between the landing door connector 311 and the wall connector 312.

[0071] Furthermore, the second end of the upper threshold 50 of the floor door forms a second gap with the front wall 40 of the shaft through the second connector 31;

[0072] The connection structure of the upper sill 50 of the landing door also includes a second adjustment component 60. The second adjustment component 60 is disposed between the second end of the upper sill 50 of the landing door and the second connector 31. The second connector 31 is connected to the front wall 40 of the shaft through the second adjustment component 60 to adjust the distance of the second gap.

[0073] In this embodiment, due to the middle portion 313, a gap exists between the second end of the landing sill 50 and the front wall 40 of the shaft via the second connector 31. The landing sill connection structure also includes a second adjustment component 60, which can adjust the distance of the second gap, thereby changing the distance between the second end of the landing sill 50 and the front wall 40 of the shaft, and thus adapting to different civil engineering deviations of the front wall 40. When the civil engineering deviation of the front wall 40 is too large, the second gap can be increased; when the civil engineering deviation of the front wall 40 is small, the second gap can be decreased.

[0074] Furthermore, such as Figure 4 to Figure 5 As shown, the second adjustment component 60 includes:

[0075] The first adjusting rod 601 has a first through hole 3111 on the door connecting part 311. The first adjusting rod 601 passes through the second end of the door upper sill 50 and the first through hole 3111.

[0076] The first fixing member 602 is used to fix one end of the first adjusting rod 601 that passes through the first through hole 3111.

[0077] In this design, the first adjusting rod 601 is a screw, and the first fixing member 602 is a fixing nut. By rotating the fixing nut on the first adjusting rod 601, the size of the second gap can be changed. Alternatively, the first adjusting member can be a lead screw, and the second fixing member can be a nut, allowing the interaction between the lead screw and the nut to change the size of the second gap.

[0078] Furthermore, the second adjusting assembly 60 also includes a locking member 603, which passes through the first adjusting rod 601 and is positioned between the upper sill of the landing door 50 and the first through hole 3111. One side of the locking member 603 abuts against the upper sill of the landing door 50. The locking member 603 is also a nut, fixed to the first adjusting rod 601 and positioned between the first through hole 3111 and the upper sill of the landing door 50, thereby working together with the first fixing member 602 to lock the position of the first adjusting rod 601.

[0079] In another embodiment, such as Figure 6 As shown, the second adjustment component 60 also includes a shim 604, which passes through the first adjustment rod 601. The two sides of the shim 604 abut against the upper threshold 50 of the landing door and the second connecting mechanism 30, respectively. When the second gap is small, the locking element 603 can be omitted, or the shim 604 can be omitted entirely, thus accommodating more deviations in the civil engineering of the shaft front wall 40.

[0080] In another embodiment, such as Figure 7 As shown, the middle part 313 is provided with a second through hole 3131. The second adjustment component 60 includes a second adjustment rod 605 and a second fixing member 606. The second adjustment rod 605 passes through the landing door sill 50 and the second through hole 3131. The second fixing member 606 is used to fix one end of the adjustment member that passes through the second through hole 3131. When both the first gap and the second gap are zero, the landing door sill 50 is fitted against the front wall 40 of the shaft. At this time, the first adjustment rod 601 and the first fixing member 602 are not provided. Instead, the second adjustment rod 605 and the second fixing member 606 are provided. The second adjustment rod 605 is inserted into the second through hole 3131 of the middle part 313 and then fixed by the second fixing member 606, so that the landing door sill 50 can be fitted tightly against the front wall 40 of the shaft.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A layer door upper sill connecting structure, characterized by, The layer door upper ridge connecting structure comprises: A first connecting mechanism (10) is arranged on the shaft front wall (40), and the first end of the layer door upper ridge (50) is connected to the shaft front wall (40) through the first connecting mechanism (10) to form a first gap; A first adjusting assembly (20) is arranged between the first end of the layer door upper ridge (50) and the first connecting mechanism (10), and the first connecting mechanism (10) is connected to the shaft front wall (40) through the first adjusting assembly (20) to adjust the distance of the first gap; A second connecting mechanism (30) is arranged on the shaft front wall (40), and the second end of the layer door upper ridge (50) is connected to the shaft front wall (40) through the second connecting mechanism (30).

2. The layer door upper step connection structure according to claim 1, characterized in that, The first connecting mechanism (10) comprises a first connecting piece (11) and a first mounting piece (12), and the first mounting piece (12) is used for fixing the first connecting piece (11) on the shaft front wall (40).

3. The layer door upper ledge connection structure of claim 2, wherein, The first connecting piece (11) comprises a first connecting plate (111) and a second connecting plate (112), and the first connecting plate (111) and the second connecting plate (112) are fixedly connected and arranged at an angle; The first adjusting assembly (20) comprises a first sliding groove (201) and a second sliding groove (202), the first sliding groove (201) is arranged on the first connecting plate (111), and the second sliding groove (202) is arranged on the second connecting plate (112); When the first end of the layer door upper ridge (50) is slidably connected to the first sliding groove (201), the first mounting piece (12) is connected to the second connecting plate (112), so that the first gap has a first adjusting range; When the first end of the layer door upper ridge (50) is slidably connected to the second sliding groove (202), the first mounting piece (12) is connected to the first connecting plate (111), so that the first gap has a second adjusting range; The first adjusting range and the second adjusting range are different.

4. The layer door upper cam connection structure of claim 1, wherein The second connecting mechanism (30) comprises a second connecting piece (31) and a second mounting piece (32), and the second mounting piece (32) is used for mounting the second connecting piece (31) on the shaft front wall (40).

5. The layer door upper cam connection structure according to claim 4, characterized in that, The second connecting piece (31) comprises: A layer door connecting part (311) is arranged on the side away from the shaft front wall (40); A wall body connecting part (312) is arranged on the side close to the shaft front wall (40), and the second mounting piece (32) is used for mounting the wall body connecting part (312) on the shaft front wall (40); An intermediate part (313) is arranged between the layer door connecting part (311) and the wall body connecting part (312); The layer door connecting part (311), the intermediate part (313) and the wall connecting part (312) are sequentially connected to form a bending structure.

6. The layer door upper cam connection structure according to claim 5, wherein The second end of the layer door upper ridge (50) forms a second gap with the shaft front wall (40) through the second connecting piece (31). The layer door upper ridge connecting structure further comprises a second adjusting assembly (60), which is arranged between the second end of the layer door upper ridge (50) and the second connecting piece (31), and the second connecting piece (31) is connected with the shaft front wall (40) through the second adjusting assembly (60) to adjust the distance of the second gap.

7. The layer door upper cam connection structure according to claim 6, characterized in that, The second adjusting assembly (60) comprises: A first adjusting rod (601) is provided with a first through hole (3111) on the layer door connecting part (311), and the first adjusting rod (601) passes through the second end of the layer door upper ridge (50) and the first through hole (3111); A first fixing piece (602) is used for fixing one end of the first adjusting rod (601) passing through the first through hole (3111).

8. The layer door upper cam connection structure according to claim 7, characterized in that, The second adjusting assembly (60) further comprises a locking piece (603), which is arranged on the first adjusting rod (601) and between the layer door upper ridge (50) and the first through hole (3111), and one side of the locking piece (603) abuts against the layer door upper ridge (50).

9. The layer door upper cam connection structure of claim 8, wherein, The second adjusting assembly (60) further comprises a gasket (604), which is arranged on the first adjusting rod (601), and two sides of the gasket (604) abut against the layer door upper ridge (50) and the second connecting mechanism (30) respectively.

10. The layer door upper cam connection structure of claim 6, wherein The intermediate part (313) is provided with a second through hole (3131), and the second adjusting assembly (60) comprises a second adjusting rod (605) and a second fixing piece (606), the second adjusting rod (605) passes through the layer door upper ridge (50) and the second through hole (3131), and the second fixing piece (606) is used for fixing one end of the second adjusting rod (605) passing through the second through hole (3131).

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