A support device for inclined steel column

Abstract

The present invention belongs to the technical field of supporting structures in the process of building construction, and in particular relates to a supporting device for an inclined steel column, comprising a vertical section of the steel column and an inclined section of the steel column, wherein the vertical section of the steel column and the inclined section of the steel column are arranged inclinedly, and further comprising: a main supporting seat, an adjusting seat, a supporting frame, and an adjusting assembly, wherein the main supporting seat is arranged on the side wall of the vertical section of the steel column; the adjusting seat can move horizontally relative to the main supporting seat; the supporting frame connects the inclined section of the steel column and the adjusting seat; the adjusting assembly can adjust the distance between the main supporting seat and the adjusting seat; compared with the prior art, the supporting device of the present invention can be fine-tuned when the inclined steel column is compressed and deformed, and continues to support the inclined steel column at the optimal position, thereby extending the service life of the inclined steel column.

Description

Technical Field

[0001] The invention belongs to the technical field of supporting structures in a building construction process, and in particular relates to a supporting device for an inclined steel column. Background Art

[0002] A steel-frame column refers to a high-rise building that places steel sections in the column to compress the concrete column section to enhance the column's bearing capacity. Commonly used steel sections are cross-shaped and square tube-shaped. The connected basement and foundation are both reinforced concrete structures. The bottom of the column has insufficient local pressure at the contact surface between the steel section and the concrete, and relies on rivets welded to the steel section to resist shear and compression.

[0003] The construction of engineering buildings often involves the construction of inclined steel columns. Due to the heavy weight and large inclination angle of the inclined steel columns, it is not easy for construction equipment to support the inclined steel columns, and there are safety hazards. Therefore, there is an urgent need for a support device that can stably support the inclined steel columns. Summary of the invention

[0004] The purpose of the present invention is to provide a supporting device for an inclined steel frame column in response to the above-mentioned technical problems. Under the support of this supporting device, if the inclined steel frame column is deformed under pressure, the supporting device can be fine-tuned to continue to support the inclined steel frame column in the optimal position, thereby extending the service life of the inclined steel frame column.

[0005] In view of this, the present invention provides a support device for an inclined steel column, comprising a vertical section of the steel column and an inclined section of the steel column, wherein the vertical section of the steel column and the inclined section of the steel column are arranged in an inclined manner, and further comprising:

[0006] Main support seat, which is arranged on the side wall of the vertical section of the steel column;

[0007] The adjustment seat is arranged on the side of the main support seat away from the vertical section of the steel column, and the adjustment seat can move horizontally relative to the main support seat;

[0008] A support frame, the upper end of which is connected to the inclined section of the steel column, and the lower end of which is connected to the adjustment seat;

[0009] An adjustment component is arranged between the main support seat and the adjustment seat, and the adjustment component can adjust the distance between the main support seat and the adjustment seat;

[0010] Wherein, the support frame can move a certain distance close to the adjustment seat after being subjected to a certain pressure. After the support frame moves close to the adjustment seat, the adjustment assembly can reduce the distance between the main support seat and the adjustment seat.

[0011] In the present technical solution, when the inclined section of the steel frame column is deformed downward due to greater pressure, the support frame will move a certain distance closer to the adjustment seat. At the same time, under the action of the adjustment assembly, the adjustment seat will move closer to the main support seat to reduce the distance between the main support seat and the adjustment seat. In this way, the connection point between the upper end of the support frame and the inclined section of the steel frame column moves toward the direction close to the vertical section of the steel frame column, so that the support structure formed by the support frame and the adjustment seat can more accurately find a new support point when the height is slightly reduced, and stably support the inclined section of the steel frame column, thereby extending the service life of the inclined steel frame column and avoiding safety accidents.

[0012] In the above technical solution, further, the adjustment component includes:

[0013] A thrust block is arranged between the main support seat and the adjustment seat, and the surface of the thrust block close to the adjustment seat is an inclined surface;

[0014] Elastic medium, the elastic medium is located between the main support seat and the adjustment seat, and the elastic medium is stretched and stressed in the initial position.

[0015] In the above technical solution, further, the surface on which the adjustment seat contacts the thrust block is an inclined surface.

[0016] In the above technical solution, further, an adjustment groove is provided on the upper surface of the adjustment seat, the lower end of the support frame is located in the adjustment groove, a pressure stop groove is provided below the adjustment groove, the inner diameter of the pressure stop groove is smaller than the inner diameter of the adjustment groove, and the support frame can enter the pressure stop groove after being subjected to a certain pressure;

[0017] A connecting groove is provided on the side wall of the adjustment seat close to the main support seat, the connecting groove is connected to the adjustment groove, a connecting rod is provided in the connecting groove, the first end of the connecting rod is connected to the side wall of the support frame, and the second end of the connecting rod is connected to the thrust block.

[0018] In the above technical solution, further, a fixing groove is provided on the side wall of the main support seat close to the adjustment seat, and a supporting cross frame is provided on the side wall of the adjustment seat close to the main support seat, and one end of the supporting cross frame away from the adjustment seat is horizontally slidably arranged in the fixing groove;

[0019] The elastic medium is located in the fixing groove, and the elastic medium is respectively connected to the supporting cross frame and the side wall of the fixing groove.

[0020] In the above technical solution, further, a side sliding track is provided on the side wall of the inclined section of the steel frame column close to the support frame, and a support block is provided at the upper end of the support frame. The support block is slidably arranged on the side sliding track. When the distance between the adjustment seat and the main support seat is reduced, the support block slides on the side sliding track toward the direction close to the vertical section of the steel frame column.

[0021] In the above technical solution, further, a sliding groove is provided on the side wall of the main support seat close to the thrust block, and a sliding block is provided on the side wall of the thrust block close to the sliding groove, and the sliding block is slidably connected to the sliding groove.

[0022] The beneficial effects of the present invention are:

[0023] 1. By designing the supporting device of the inclined steel frame column into an adjustable structure, when the inclined steel frame column is deformed under pressure, fine-tuning can be performed to continue to support the inclined steel frame column in the optimal position, thereby extending the service life of the inclined steel frame column.

[0024] 2. By setting a thrust block between the main support seat and the adjustment seat, the thrust block is in direct contact with the main support seat and the adjustment seat to ensure that a stable distance can be formed between the main support seat and the adjustment seat. At the same time, through the setting of elastic medium, when a gap appears between the support seat, the adjustment seat and the thrust block, the gap is eliminated in time, thereby reducing the distance between the main support seat and the adjustment seat, and realizing the adjustment of the support point of the inclined steel column by the support structure with a simple structure.

[0025] 3. By setting a pressure-stop groove below the adjustment groove, the support frame cannot enter the pressure-stop groove under normal force, thereby ensuring the structural stability of the support device during normal support. Only when the inclined section of the steel column is subjected to a large pressure, the lower end of the support frame can be squeezed and deformed by the side wall of the pressure-stop groove due to the pressure drop, so that the support frame moves downward, thereby reducing the distance between the support seat and the adjustment seat.

[0026] 4. By setting a side sliding track on the inclined section of the steel frame column, the support block at the upper end of the support frame is slidably connected to the side sliding track, so that the connection position of the support frame and the inclined section of the steel frame column will not change too much during the movement, thereby ensuring the support stability of the inclined steel frame column. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in the first direction.

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure in the second direction of the present invention.

[0030] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention in the third direction.

[0031] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the present invention.

[0032] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0033] Figure 6 It is a schematic diagram of the structure of the adjustment seat in the present invention.

[0034] The symbols in the figure are:

[0035] 101-vertical section of steel column, 102-inclined section of steel column, 2-main support seat, 201-fixed groove, 3-adjustment seat, 301-adjustment groove, 302-pressure stop groove, 303-connecting groove, 4-support frame, 401-support block, 501-thrust block, 502-elastic medium, 6-connecting rod, 7-support cross frame, 8-side sliding track, 9-sliding groove, 10-sliding block. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0039] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0040] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0041] Example 1

[0042] like Figure 1-Figure 3 As shown, this embodiment provides a support device for an inclined steel column. The inclined steel column is the main body of the engineering building structure, and the commonly used cross-sections are cross-shaped and square tube-shaped;

[0043] In this embodiment, the inclined steel column includes a steel column vertical section 101 and a steel column inclined section 102. The steel column vertical section 101 and the steel column inclined section 102 are arranged obliquely, and the steel column vertical section 101 and the steel column inclined section 102 are fixedly connected. The support device includes: a main support seat 2, an adjustment seat 3, a support frame 4, and an adjustment component;

[0044] See also Figure 1 , the main support seat 2 is arranged on the side wall of the vertical section 101 of the steel column, and the main support seat 2 is fixedly connected to the vertical section 101 of the steel column;

[0045] The adjustment seat 3 is arranged on the side of the main support seat 2 away from the vertical section 101 of the steel column. The adjustment seat 3 can move horizontally relative to the main support seat 2. The horizontal movement in this embodiment can be understood as moving in a direction perpendicular to the length direction of the vertical section 101 of the steel column.

[0046] The upper end of the support frame 4 is connected to the bottom surface of the steel column inclined section 102, and the lower end of the support frame 4 is connected to the adjustment seat 3;

[0047] The adjustment component is arranged between the main support seat 2 and the adjustment seat 3, and the adjustment component can adjust the distance between the main support seat 2 and the adjustment seat 3;

[0048] In this embodiment, the support frame 4 can move a certain distance close to the adjustment seat 3 after being subjected to a certain pressure. The "certain distance" here refers to the downward bending deformation of the inclined section 102 of the steel frame column after being subjected to a large external force, thereby causing the deformation of the inclined section 102 of the steel frame column in the vertical direction. The moving distance of the support frame 4 depends on the deformation of the inclined section 102 of the steel frame column. After the support frame 4 moves close to the adjustment seat 3, the adjustment component can reduce the distance between the main support seat 2 and the adjustment seat 3, so that the adjustment seat 3 can move a certain distance toward the main support seat 2, so that the connection point between the support frame 4 and the inclined section 102 of the steel frame column can be offset toward the connection between the inclined section 102 of the steel frame column and the vertical section 101 of the steel frame column, so that the support frame 4 can give the inclined section 102 of the steel frame column an ​​upward thrust to reduce the subsequent bending deformation of the inclined section 102 of the steel frame column, thereby extending the service life of the inclined steel frame column.

[0049] Example 2

[0050] This embodiment provides a support device for an inclined steel column, which, in addition to the technical solutions of the above embodiments, also discloses a structure of an adjustment component;

[0051] See also Figure 4-Figure 5 The regulating assembly includes a thrust block 501 and an elastic medium 502.

[0052] The thrust block 501 is disposed between the main support seat 2 and the adjustment seat 3. The left and right side walls of the thrust block 501 are in contact with the main support seat 2 and the adjustment seat 3 respectively. The surface of the thrust block 501 close to the adjustment seat 3 is an inclined surface.

[0053] The elastic medium 502 is located between the main support seat 2 and the adjustment seat 3. In the initial position, the elastic medium 502 is stretched and stressed.

[0054] In this embodiment, the push-block 501 is located at the lower part of the main support seat 2 and the adjustment seat 3. When the push-block 501 moves upward, the adjustment seat 3 can be pushed away from the main support seat 2 and the elastic medium 502 can be stretched. When the push-block 501 moves downward, a gap will be generated between the main support seat 2, the push-block 501 and the adjustment seat 3. At this time, the elastic force accumulated by the stretching of the elastic medium 502 can pull the adjustment seat 3 towards the main support seat 2, thereby eliminating the gap between the main support seat 2, the push-block 501 and the adjustment seat 3.

[0055] The elastic medium 502 may be a spring, or other suitable elastic materials or elastic structure combinations;

[0056] Before using the support device, first adjust the adjustment seat 3 and the main support seat 2 to a suitable distance so that the elastic medium 502 accumulates appropriate elastic force. When in use, connect the main support seat 2 to the vertical section 101 of the steel column, and then connect the support frame 4 to the inclined section 102 of the steel column. After the inclined section 102 of the steel column is compressed and bent, the thrust block 501 will only move downward to reduce the distance between the adjustment seat 3 and the main support seat 2.

[0057] In this embodiment, the surface on which the adjustment seat 3 contacts the thrust block 501 is an inclined surface, so that the contact area between the adjustment seat 3 and the thrust block 501 can be increased. Preferably, the inclined surface angle of the adjustment seat 3 is the same as the inclined surface angle of the thrust block 501, so that the contact area between the adjustment seat 3 and the thrust block 501 can be maximized; since the adjustment seat 3 and the thrust block 501 need to be in contact for a long time, such a design can improve the structural stability of the support device.

[0058] Example 3

[0059] This embodiment provides a support device for an inclined steel column, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0060] See also Figure 5An adjusting groove 301 is provided on the upper surface of the adjusting seat 3, and the lower end of the supporting frame 4 is located in the adjusting groove 301. Generally, the lower end of the supporting frame 4 is slidably connected to the adjusting groove 301, and a pressure-stopping groove 302 is provided below the adjusting groove 301. The inner diameter of the pressure-stopping groove 302 is smaller than the inner diameter of the adjusting groove 301, and the supporting frame 4 can enter the pressure-stopping groove 302 after being subjected to a certain pressure;

[0061] In this embodiment, the side wall of the pressure-stop groove 302 is an inclined surface, and the inner diameter of the lower part of the pressure-stop groove 302 is smaller than the inner diameter of the upper part. In this way, after the inclined section 102 of the steel column is subjected to a large pressure, the inclined section 102 of the steel column transmits the pressure to the support frame 4. After the pressure borne by the support frame 4 reaches a certain threshold, the side wall of the pressure-stop groove 302 will be squeezed, so that the side wall of the pressure-stop groove 302 or the bottom side wall of the support frame 4 will be deformed and partially inserted into the pressure-stop groove 302 to avoid damage to the support frame 4. As the pressure increases, the volume of the support frame 4 inserted into the pressure-stop groove 302 will increase until it is inserted into the entire pressure-stop groove 302.

[0062] See also Figure 2 A connecting groove 303 is provided on the side wall of the adjusting seat 3 close to the main supporting seat 2, the connecting groove 303 is connected with the adjusting groove 301, a connecting rod 6 is provided in the connecting groove 303, a first end of the connecting rod 6 is connected to the side wall of the supporting frame 4, and a second end of the connecting rod 6 is connected to the thrust block 501;

[0063] When the support frame 4 moves downward, the connecting rod 6 drives the thrust block 501 to move downward, so as to adjust the distance between the adjustment seat 3 and the main support seat 2 .

[0064] Example 4

[0065] This embodiment provides a support device for an inclined steel column, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0066] See also Figure 6 A fixing groove 201 is provided on the side wall of the main support seat 2 close to the adjustment seat 3, and a supporting cross frame 7 is provided on the side wall of the adjustment seat 3 close to the main support seat 2. The supporting cross frame 7 is U-shaped, and the U-shaped ends of the supporting cross frame 7 are fixedly connected to the adjustment seat 3, and the U-shaped middle part of the supporting cross frame 7 is horizontally slidable in the fixing groove 201;

[0067] See also Figure 5 The elastic medium 502 is located in the fixing groove 201 , and the elastic medium 502 is respectively connected to the supporting cross frame 7 and the side wall of the fixing groove 201 .

[0068] When the adjustment seat 3 moves horizontally relative to the main support seat 2, the support cross frame 7 moves horizontally in the fixing groove 201, thereby increasing the contact area between the adjustment seat 3 and the main support seat 2, thereby improving the structural stability of the support device.

[0069] Example 5

[0070] This embodiment provides a support device for an inclined steel column, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0071] See also Figure 3 A side sliding track 8 is provided on the side wall of the inclined section 102 of the steel frame column close to the support frame 4, and a support block 401 is provided at the upper end of the support frame 4. The support block 401 is slidably arranged on the side sliding track 8. When the distance between the adjustment seat 3 and the main support seat 2 is reduced, the support block 401 slides on the side sliding track 8 toward the direction close to the vertical section 101 of the steel frame column.

[0072] The support block 401 is connected to the side sliding track 8 by a high friction material. Within the normal pressure range of the steel column inclined section 102, the support block 401 and the side sliding track 8 remain relatively still. When the steel column inclined section 102 is subjected to excessive pressure, the support frame 4 moves downward, and the support block 401 is driven by the support frame 4 to move a certain distance relative to the side sliding track 8, and then the support block 401 and the side sliding track 8 remain relatively still again.

[0073] Example 6

[0074] This embodiment provides a support device for an inclined steel column, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0075] See also Figure 5 A sliding groove 9 is provided on the side wall of the main support seat 2 close to the push-block 501, and a sliding block 10 is provided on the side wall of the push-block 501 close to the sliding groove 9. The sliding block 10 is slidably connected to the sliding groove 9.

[0076] In this embodiment, the thrust block 501 will not undergo horizontal displacement with the main support seat 2 during the process of moving up and down. When the thrust block 501 moves downward, only a gap will be generated between the thrust block 501 and the adjustment seat 3, thereby ensuring the structural stability between the thrust block 501 and the main support seat 2 and the adjustment seat 3, thereby ensuring the structural stability of the support device.

[0077] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A support device for an inclined steel column, comprising a steel column vertical section (101) and a steel column inclined section (102), wherein the steel column vertical section (101) and the steel column inclined section (102) are arranged in an inclined manner, characterized in that: Also includes: A main support seat (2), the main support seat (2) being arranged on a side wall of the vertical section (101) of the steel column; An adjustment seat (3), the adjustment seat (3) being arranged on a side of the main support seat (2) away from the steel column vertical section (101), and the adjustment seat (3) being movable horizontally relative to the main support seat (2); A support frame (4), the upper end of the support frame (4) being connected to the steel column inclined section (102), and the lower end of the support frame (4) being connected to the adjustment seat (3); An adjustment component, the adjustment component being arranged between the main support seat (2) and the adjustment seat (3), and the adjustment component being capable of adjusting the distance between the main support seat (2) and the adjustment seat (3); Wherein, when the pressure borne by the support frame (4) reaches a certain threshold, the support frame (4) can move a certain distance closer to the adjustment seat (3); after the support frame (4) moves closer to the adjustment seat (3), the adjustment component can reduce the distance between the main support seat (2) and the adjustment seat (3); The adjustment component comprises: A thrust block (501), the thrust block (501) being arranged between the main support seat (2) and the adjustment seat (3), and the surface of the thrust block (501) on a side close to the adjustment seat (3) being an inclined surface; An elastic medium (502), the elastic medium (502) being located between the main support seat (2) and the adjustment seat (3), and the elastic medium (502) being stretched and stressed in an initial position; An adjustment groove (301) is provided on the upper surface of the adjustment seat (3), the lower end of the support frame (4) is located in the adjustment groove (301), a pressure-stop groove (302) is provided below the adjustment groove (301), the inner diameter of the pressure-stop groove (302) is smaller than the inner diameter of the adjustment groove (301), and the support frame (4) can enter the pressure-stop groove (302) when the pressure it bears reaches a certain threshold; A connecting groove (303) is provided on the side wall of the adjustment seat (3) close to the main support seat (2), the connecting groove (303) is communicated with the adjustment groove (301), a connecting rod (6) is provided in the connecting groove (303), a first end of the connecting rod (6) is connected to the side wall of the support frame (4), and a second end of the connecting rod (6) is connected to the thrust block (501); A fixing groove (201) is provided on the side wall of the main support seat (2) close to the adjustment seat (3), and a supporting cross frame (7) is provided on the side wall of the adjustment seat (3) close to the main support seat (2), and one end of the supporting cross frame (7) away from the adjustment seat (3) is horizontally slidably arranged in the fixing groove (201); The elastic medium (502) is located in the fixing groove (201), and the elastic medium (502) respectively connects the supporting cross frame (7) and the side wall of the fixing groove (201).

2. The support device for an inclined steel column according to claim 1, characterized in that: The surface of the adjustment seat (3) in contact with the thrust block (501) is an inclined surface.

3. A support device for an inclined steel column according to any one of claims 1 to 2, characterized in that: A side sliding track (8) is provided on the side wall of the inclined section (102) of the steel frame column close to the support frame (4), and a support block (401) is provided at the upper end of the support frame (4). The support block (401) is slidably arranged on the side sliding track (8). When the distance between the adjustment seat (3) and the main support seat (2) decreases, the support block (401) slides on the side sliding track (8) towards the direction close to the vertical section (101) of the steel frame column.

4. A support device for an inclined steel column according to any one of claims 1 to 2, characterized in that: A sliding groove (9) is provided on the side wall of the main support seat (2) close to the thrust block (501), and a sliding block (10) is provided on the side wall of the thrust block (501) close to the sliding groove (9). The sliding block (10) is slidably connected to the sliding groove (9).

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