Mounting structure of rock wool heat preservation composite unit aluminum plate curtain wall

Abstract

The utility model discloses an installation structure of a rock wool heat preservation composite unit aluminum plate curtain wall, which is characterized in that hot-dip galvanized square steel and hot-dip galvanized angle steel are welded to form a truss type curtain wall keel, long hooks and short hooks are respectively welded at main stressed parts of the curtain wall keel, and a plurality of horizontal bearing pieces are arranged on the curtain wall keel; rock wool boards are arranged in the middles of the calcium silicate boards to form heat preservation units, the heat preservation units are clamped between the upper horizontal bearing piece and the lower horizontal bearing piece, the long hooks penetrate through the heat preservation units and the short hooks to cut the heat preservation units, and curtain wall units are formed after the heat preservation units are installed. A first connecting piece and a second connecting piece are welded to a flange plate of a steel beam on the periphery of a main body structure and the outer vertical face of a steel column respectively, a long hook and a short hook are correspondingly hung on the first connecting piece and the second connecting piece respectively when a curtain wall unit is installed, an outer decorative face is made of a corrugated aluminum veneer, the upper portion and the lower portion of the outer decorative face are sealed through aluminum buckle plates, flanging treatment is conducted, and a self-waterproof structure is formed.

Description

Technical Field

[0001] The utility model relates to an installation structure of an aluminum plate curtain wall, in particular to an installation structure of a rock wool thermal insulation composite unit aluminum plate curtain wall. Background Art

[0002] At present, the aluminum curtain walls mainly used in China are mainly divided into composite aluminum panels and aluminum alloy single panels. Composite aluminum panels are mainly made by setting a polyethylene or other thermal insulation interlayer between two layers of aluminum panels, and are hoisted and constructed as integral wall panels. They are mainly used in some simple houses or temporary houses. Aluminum alloy single panels are mainly used as decorative surfaces of buildings. Due to their strong machinability, they are more in line with today's architectural design concepts that pursue beauty and artistry. However, in actual applications, both of the above two types currently have some problems. For example, the strength and thermal insulation performance of composite aluminum curtain walls are poor, and the scope of application is small; aluminum alloy single panel curtain walls cannot be used alone, and external wall insulation construction must be carried out inside first, and their installation quality is difficult to control. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide an installation structure of a rock wool insulation composite unit aluminum plate curtain wall with good thermal insulation performance, stable structure, and diverse shapes, which helps to improve construction quality and building comfort.

[0004] The utility model discloses an installation structure of a rock wool thermal insulation composite unit aluminum plate curtain wall, comprising a curtain wall keel, wherein the curtain wall keel is a rectangular truss structure; the outer trusses of the curtain wall keel facing the outdoor side are all welded with angle steel; the second outer frame frame at the peripheral position of the inner truss facing the indoor side and the middle vertical rod connected between the upper frame and the lower frame of the second outer frame are all welded with square steel pipes, and the remaining rods in the inner truss are welded with angle steel;

[0005] A plurality of horizontal supporting members are welded at even intervals and symmetrically on the upper and lower horizontal frames of the second outer frame frame; a short hook is welded to the top and bottom of the left and right side vertical bars of the second outer frame frame; long hooks are welded to the middle section of the middle vertical bar at intervals; the short hooks and the long hooks each have an N-shaped groove;

[0006] The inner and outer walls of the area surrounded by the second outer frame are fully covered with insulation units, and the insulation units are connected and fixed to the curtain wall keels to form a curtain wall unit as a whole. The upper and lower sides of the insulation units are clamped between multiple horizontal supporting members on the upper frame and the lower frame, and the long hook passes through the insulation unit and the short hook is exposed from the insulation unit.

[0007] A first connector is welded on the steel beam flange plate on the outer periphery of the main structure of the building according to the designed position, and the first connector has a first vertical surface; a second connector is welded at the designed position on the outer facade of the steel column of the main structure of the building, and the second connector has a second vertical surface; the first vertical surface of the first connector is inserted into the N-shaped groove of the corresponding long hook, and the second vertical surface of the second connector is inserted into the N-shaped groove of the corresponding short hook; all long hooks are welded and fixed to the corresponding first connections, and all short hooks are welded and fixed to the corresponding second connectors. A decorative surface is installed on the side of the curtain wall keel facing the outdoors, and aluminum gussets are installed on the top and bottom surfaces of the curtain wall keel respectively. The aluminum gussets are all turned inward to fasten the upper and lower sides of the outer aluminum single plate, and the adjacent aluminum gussets are sealed with glue at the gaps.

[0008] The utility model is beneficial in that:

[0009] The utility model combines the rock wool insulation unit and the aluminum veneer curtain wall through the curtain wall keel to form a rock wool insulation composite unit aluminum plate curtain wall, which not only ensures the structural strength of the aluminum veneer curtain wall, but also improves the thermal insulation performance of the curtain wall, eliminates the separate construction process of external wall insulation, and innovates a type of unit curtain wall. The curtain wall is prefabricated in the factory and hoisted on site, which is easy to install, energy-saving and environmentally friendly, and effectively saves construction time and cost. The curtain wall keel adopts the form of a truss, which has a stable structure and high bearing capacity, and forms a hollow cavity in the unit curtain wall to further improve the thermal insulation effect. At the same time, except for the keel of the curtain wall keel that needs to be welded hooks and the main load-bearing frame that uses galvanized square steel pipes, the rest are all galvanized angle steel, which reduces the weight of the keel while ensuring the bearing capacity and strength of the keel; the rock wool board is arranged in the middle of the calcium silicate board to form an insulation unit in the form of an insulation sandwich panel, so that the insulation board has better integrity and is more convenient to install on the curtain wall keel. The multiple horizontal support members arranged on the curtain wall keel can It can effectively support and fix the insulation unit, making the overall structure of the curtain wall more reliable; the long hook and the short hook correspond to the first and second connectors on the flange plate of the steel beam of the main structure of the building and the facade of the steel column respectively, and the position of the curtain wall is adjusted by the stiffening positioning plate on the connector, and the positioning is accurate; the exterior aluminum veneer is combined with the edge-sealed aluminum gusset plate to wrap the cavity of the curtain wall keel as a whole, with beautiful shape. The exterior aluminum veneer adopts corrugated form, and the upper and lower aluminum gusset plates are flanging treated. After rainwater flows down the aluminum veneer finish, it is diverted and flows away through the aluminum gusset plate below without seeping, forming a self-waterproof structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0011] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] Figure 1 This is a structural diagram of a curtain wall keel used in the installation structure of a rock wool thermal insulation composite unit aluminum panel curtain wall of the present invention;

[0013] Figure 2 for Figure 1 The curtain wall keel shown is a left-side view rotated 90 degrees from the rear;

[0014] Figure 3 for Figure 2 The section view after the curtain wall keel is installed with the insulation unit is shown;

[0015] Figure 4 A side view of the first connector installed behind the steel beam flange plate on the outer perimeter of the main building structure;

[0016] Figure 5 for Figure 4 A top view of the structure after the first connecting member is installed;

[0017] Figure 6 This is a side view of the second connecting member installed behind the main structural steel of the building;

[0018] Figure 7 for Figure 6 A top view of the second connecting member after installation in the structure;

[0019] Figure 8 This is a schematic diagram of the support angle steel and the connecting angle steel of the second connecting member of the utility model;

[0020] Figure 9 This is a cross-sectional view of the first connecting member and the second connecting member of the utility model after installation;

[0021] Figure 10 This is a plan view of the first connecting member and the second connecting member of the utility model after installation;

[0022] Figure 11 This is a cross-sectional view of the connection node between the long hook and the first connecting piece after the installation of the rock wool insulation composite unit aluminum plate curtain wall of the utility model;

[0023] Figure 12 This is a plan view of the connection node between the long hook and the first connecting piece after the installation of the rock wool insulation composite unit aluminum plate curtain wall of the utility model;

[0024] Figure 13This is a cross-sectional view of the connection node between the short hook and the second connecting piece after the installation of the rock wool thermal insulation composite unit aluminum plate curtain wall of the utility model;

[0025] Figure 14 This is a plan view of the connection node between the short hook and the second connector after the installation of the rock wool insulation composite unit aluminum plate curtain wall of the utility model;

[0026] Figure 15 This is the overall cross-sectional view of the utility model's rock wool thermal insulation composite unit aluminum panel curtain wall after installation;

[0027] Figure 16 This is the overall plan view of the rock wool insulation composite unit aluminum panel curtain wall after installation;

[0028] Figure 17 This is the overall structural diagram of the rock wool insulation composite unit aluminum panel curtain wall after installation. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the technical solution of the present disclosure, but the technical solution of the present disclosure can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the technical solution of the present disclosure, rather than all the embodiments.

[0031] As shown in the accompanying drawings, the utility model provides an installation structure for a rock wool insulation composite unit aluminum plate curtain wall, including a curtain wall keel, which is a rectangular truss structure; the curtain wall keel is the main load-bearing and supporting structure of the rock wool insulation composite unit aluminum plate curtain wall.

[0032] The outer trusses facing the outdoor side of the curtain wall keel are all welded with angle steel 2; preferably, the outer trusses are all made of hot-dip galvanized angle steel; further, the first outer frame frame at the peripheral position of the outer truss is made of 50*3.5mm hot-dip galvanized angle steel, and the middle support and diagonal brace are made of 40*3.5mm hot-dip galvanized angle steel.

[0033] The second outer frame frame at the perimeter of the inner truss facing the interior, and the intermediate vertical bars 1-2 connecting the upper and lower frames of the second outer frame frame, are welded together using square steel pipes. The remaining members of the inner truss are welded together using angle steels 2 to form the overall frame. Preferably, the square steel pipes are galvanized. The angle steels in the inner truss are preferably hot-dip galvanized angle steels, with 40 x 3.5 mm hot-dip galvanized angle steels being particularly preferred.

[0034] A plurality of horizontal supporting members 4 are welded at even intervals and symmetrically on the upper and lower horizontal frames 1-1 and the lower frame of the second outer frame frame. A short hook 3-2 is welded to the top and bottom of the left side vertical rod 1-3 and the right side vertical rod of the second outer frame frame respectively; long hooks 3-1 are welded to the middle rod section of the middle vertical rod 1-2 at intervals above and below; the short hooks and the long hooks each have an N-shaped groove;

[0035] Preferably, the horizontal length L1 of the n-shaped slot width in the long hook is 250mm, and the horizontal length L2 of the n-shaped slot width in the short hook is 135mm. The hook size is determined by the position of its corresponding connector on the main steel structure. The connectors are located on the completed steel beams and columns. The vertical planes of the welded connectors on the steel beams and columns are not in the same plane. The steel beams are located on the inside, so they require long hooks; the steel columns are located on the outside, so they require short hooks. By properly arranging long and short hooks, the curtain wall keel can be installed securely and maintain verticality after hanging.

[0036] By using suitable types of hot-dip galvanized angle steel for non-main load-bearing members in the curtain wall keel frame, compared with the keel frame in which the entire truss is made of hot-dip galvanized square steel tubes, its weight is greatly reduced, which can effectively reduce the load on the hook part, improve the stability of the curtain wall after installation, and increase the safety reserve for the overall lifting of the curtain wall.

[0037] The area enclosed by the second outer frame is fully covered with insulation units, which are connected and fixed to the curtain wall keels to form an integral curtain wall unit. The upper and lower edges of the insulation units are clamped between multiple horizontal support members 4 on the upper and lower frames 1-1, with long hooks 3-1 extending through the insulation units and short hooks 3-2 protruding from the insulation units. Each insulation unit comprises two calcium silicate boards 6 and a rock wool board 5 fixedly connected and sandwiched between the two calcium silicate boards. The calcium silicate boards and rock wool boards can be fixed with nails.

[0038] A first connecting member 11 is welded to the steel beam flange plate 10 on the outer periphery of the main structure of the building according to the designed position, and the first connecting member 11 has a first vertical surface; a second connecting member 15 is welded to the designed position on the outer facade of the steel column 14 of the main structure of the building, and the second connecting member has a second vertical surface; the first vertical surface of the first connecting member 11 is inserted into the n-shaped groove of the corresponding long hook 3-1, and the second vertical surface of the second connecting member 15 is inserted into the n-shaped groove of the corresponding short hook 3-2; all long hooks 3-1 are welded and fixed to the corresponding first connecting members 11, and all short hooks 3-2 are welded and fixed to the corresponding second connecting members 15.

[0039] A decorative surface is installed on the side of the curtain wall keel facing the outdoors. The decorative surface is a corrugated aluminum veneer 8 pressed from an aluminum alloy plate. Aluminum gusset plates 9 are respectively installed on the top and bottom surfaces of the curtain wall keel. The aluminum gusset plates 9 are all turned inward to fasten the upper and lower sides of the outer aluminum veneer 8, so that water will not enter from above when it rains. After the adjacent aluminum gusset plates are installed, the gaps are sealed with glue.

[0040] As a preferred embodiment of the present invention, the first connecting member 11 is composed of a first angle steel 12-1 and a first stiffening positioning plate 13-1 welded between two side plates of the first angle steel. The first stiffening positioning plate 13-1 is a triangular steel plate. The horizontal side plates of the first angle steel are welded to the top wall of the steel beam flange plate. The first stiffening positioning plate 13-1 is welded perpendicular to the first angle steel 12-1 and arranged on the inner side of the first angle steel 12-1. The vertical surface of the first angle steel serves as the first vertical surface.

[0041] The second connecting member 15 is welded together by a second angle steel 12-2, a third angle steel 12-3, two support plates 16, and a second stiffening positioning plate 13-2. The support plate 16 is a triangular steel plate, and the two support plates 16 are welded at intervals between the two side plates of the second angle steel 12-2; the vertical side plate of the second angle steel 12-2 is welded to the designed position on the facade of the steel column, serving as a connecting member support, and the horizontal side plate of the second angle steel 12-2 remains horizontal, with the side welded with the support plate 16 facing downward; the bottom surface of the horizontal plate of the third angle steel 12-3 is welded to the top surface of the horizontal plate of the second angle steel; the vertical plate of the third angle steel serves as the second vertical surface, and the second stiffening positioning plate 13-2 is welded perpendicular to the third angle steel on the inner side of the third angle steel;

[0042] The first vertical surface of the first connecting member 11 is inserted into the n-shaped groove of the corresponding long hook 3-1, and the second vertical surface of the second connecting member 15 is inserted into the n-shaped groove of the corresponding short hook 3-2. The long hook 3-1 is close to the side wall of the corresponding first tightening positioning plate 13-1, and the short hook 3-2 is close to the side wall of the corresponding second tightening positioning plate 13-2. All long hooks 3-1 are welded and fixed to the corresponding first connecting member 11, and all short hooks 3-2 are welded and fixed to the corresponding second connecting member 15.

[0043] The construction process of this structure includes the following steps:

[0044] Step 1: Processing curtain wall keels, which are rectangular truss structures; the curtain wall keels are the main load-bearing and supporting structures of the rock wool insulation composite unit aluminum panel curtain wall.

[0045] As an embodiment of the present invention, the processing steps of the curtain wall keel are as follows:

[0046] The first step is to weld the curtain wall keel in a truss form, wherein the outer trusses of the curtain wall keel facing the outside are welded with angle steel 2.

[0047] In the second step, square steel pipes are used to weld the second outer frame frame at the peripheral position of the inner truss facing the indoor side and the middle vertical rod 1-2 connected between the upper frame 1-1 and the lower frame of the second outer frame. The remaining rods in the inner truss are welded with angle steel 2 to form an integral frame.

[0048] In the third step, a plurality of horizontal supporting members 4 are welded at even intervals and symmetrically on the upper and lower horizontal frames 1-1 and the lower frame of the second outer frame frame. A short hook 3-2 is welded to the top and bottom of the left side vertical rod 1-3 and the right side vertical rod of the second outer frame frame respectively; long hooks 3-1 are welded to the middle rod section of the middle vertical rod 1-2 at intervals above and below; and both the short hooks and the long hooks have an N-shaped groove;

[0049] Step 2: Process multiple insulation units: Each insulation unit includes two calcium silicate boards 6 and a rock wool board 5 sandwiched between the two calcium silicate boards, which are fixedly connected. The calcium silicate board and the rock wool board can be fixed by nails.

[0050] Step 3: Fully install the insulation unit on the inner and outer walls of the area enclosed by the second outer frame. The insulation unit is connected and fixed to the curtain wall keel to form a curtain wall unit. The upper and lower edges of the insulation unit are clamped between the upper frame 1-1 and the multiple horizontal support members 4 on the lower frame. The long hook 3-1 is inserted through the insulation unit. The intersection of the insulation unit and the short hook 3-2 is cut away so that the short hook 3-2 is exposed after the insulation unit is installed.

[0051] Step 4: Weld the connectors at the corresponding positions of the steel beams and steel columns of the main structure of the building according to the design position. The specific steps are as follows:

[0052] The first step is to weld a first connecting member 11 on the steel beam flange plate 10 at the outer periphery of the main structure of the building according to the designed position, wherein the first connecting member 11 has a first vertical surface;

[0053] The second step is to weld a second connecting member 15 at a designed position on the facade of the building main structure steel column 14, wherein the second connecting member has a second vertical surface;

[0054] Step 6. Hoist the unit structure, insert the first vertical surface of the first connecting member 11 into the N-shaped groove of the corresponding long hook 3-1, and insert the second vertical surface of the second connecting member 15 into the N-shaped groove of the corresponding short hook 3-2; weld all long hooks 3-1 to the corresponding first connecting members 11, and weld all short hooks 3-2 to the corresponding second connecting members 15.

[0055] Step 7. After all the unit structures are installed and fixed, a decorative surface is installed on the side of the curtain wall keel facing the outdoors. The decorative surface is a corrugated aluminum veneer 8 pressed from an aluminum alloy plate. Aluminum gusset plates 9 are installed on the top and bottom surfaces of the curtain wall keel respectively. The aluminum gusset plates 9 are all turned inward and fastened to the upper and lower sides of the outer aluminum veneer 8 so that water will not enter from above when it rains. After the adjacent aluminum gusset plates are installed, the gaps are sealed with glue.

[0056] After testing: The rock wool insulation composite unit aluminum panel curtain wall of this structure has a solid structure, good thermal insulation performance, and beautiful appearance. At the same time, the curtain wall is processed in the factory as a whole and hoisted on site, eliminating the need for a separate construction process for external wall insulation. The construction is simple, the positioning is accurate, and the quality control is more guaranteed. The curtain wall system constructed by this utility model can meet the energy-saving and quality requirements of relevant national and industry standards such as "Rock Wool Products for External Insulation of Building Exterior Walls" (GB / T 25975-2018), "Technical Standard for External Wall Insulation Engineering" (JGJ 144-2019), and "Technical Specification for Metal and Stone Curtain Wall Engineering" (JGJ 133-2001).

[0057] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the utility model.

Claims

1. An installation structure for a rock wool thermal insulation composite unit aluminum panel curtain wall, characterized by: The invention comprises a curtain wall keel, wherein the curtain wall keel is a rectangular truss structure; the outer trusses of the curtain wall keel facing the outside are welded with angle steel; the second outer frame frame at the peripheral position of the inner truss facing the inside and the middle vertical rod (1-2) connected between the upper frame (1-1) and the lower frame of the second outer frame frame are welded with square steel pipes, and the remaining rods in the inner truss are welded with angle steel (2); a plurality of horizontal supporting members (4) are welded at uniform intervals and symmetrically on the upper and lower horizontal frames of the second outer frame frame; a short hook (3-2) is welded to the top and bottom of the left side vertical rod (1-3) and the right side vertical rod of the second outer frame frame respectively; long hooks (3-1) are welded at intervals at the middle rod section of the middle vertical rod; the short hooks and the long hooks each have an N-shaped groove; The inner and outer walls of the area enclosed by the second outer frame are fully covered with insulation units, and the insulation units are fixedly connected to the curtain wall keels to form a whole, forming a curtain wall unit. The upper and lower sides of the insulation units are clamped between multiple horizontal supporting members on the upper frame and the lower frame, and the long hook passes through the insulation unit and the short hook is exposed from the insulation unit. A first connector (11) is welded to the steel beam flange plate (10) on the outer periphery of the main structure of the building according to the designed position, and the first connector has a first vertical surface; a second connector (15) is welded to the designed position on the facade of the steel column (14) of the main structure of the building, and the second connector has a second vertical surface; the first vertical surface of the first connector is inserted into the n-shaped groove of the corresponding long hook, and the second vertical surface of the second connector is inserted into the n-shaped groove of the corresponding short hook; all long hooks are welded and fixed to the corresponding first connectors, and all short hooks are welded and fixed to the corresponding second connectors. A decorative surface is installed on the side of the curtain wall keel facing the outdoors, and aluminum gussets (9) are installed on the top and bottom surfaces of the curtain wall keel respectively. The aluminum gussets are all turned inward to buckle the upper and lower sides of the outer aluminum single plate (8), and the adjacent aluminum gussets are sealed with glue at the gap.

2. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 1 is characterized by: The first connecting member is composed of a first angle steel and a first stiffening positioning plate welded between two side plates of the first angle steel, the first stiffening positioning plate is a triangular steel plate, the horizontal side plates of the first angle steel are welded to the top wall of the steel beam flange plate, and the first stiffening positioning plate is welded perpendicular to the first angle steel and arranged on the inner side of the first angle steel; the vertical surface of the first angle steel serves as the first vertical surface; The second connecting member is composed of a second angle steel, a third angle steel, two support plates and a second stiffening positioning plate welded together. The support plate is a triangular steel plate, and the two support plates are welded at intervals between the two side plates of the second angle steel; the vertical side plate of the second angle steel is welded to the designed position on the facade of the steel column as a connecting member support, the horizontal side plate of the second angle steel remains horizontal, and the side welded with the support plate faces downward; the bottom surface of the horizontal plate of the third angle steel is welded to the top surface of the horizontal plate of the second angle steel; the vertical plate of the third angle steel serves as the second vertical surface, and the second stiffening positioning plate is welded perpendicular to the third angle steel on the inner side of the first triangular steel; the first vertical surface of the first connecting member is inserted into the n-shaped groove of the corresponding long hook, and the second vertical surface of the second connecting member is inserted into the n-shaped groove of the corresponding short hook. The long hook is close to the side wall of the corresponding first tightening positioning plate, and the short hook is close to the side wall of the corresponding second tightening positioning plate. All long hooks are welded and fixed to the corresponding first connecting members, and all short hooks are welded and fixed to the corresponding second connecting members.

3. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 1 or 2, characterized in that: Each of the heat-insulating units comprises two calcium silicate boards and a rock wool board sandwiched between the two calcium silicate boards and fixedly connected to each other.

4. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 3 is characterized by: The decorative surface is a corrugated aluminum single plate formed by pressing aluminum alloy plates.

5. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 1 or 2, characterized in that : The outer trusses are all made of hot-dip galvanized angle steel.

6. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 1 or 2, characterized in that : The square steel pipe is galvanized square steel pipe, and the angle steel in the inner truss is hot-dip galvanized angle steel.

7. The installation structure of the rock wool thermal insulation composite unit aluminum plate curtain wall according to claim 1 or 2, characterized in that : The horizontal length L1 of the width of the n-shaped groove in the long hook is 250 mm, and the horizontal length L2 of the width of the n-shaped groove in the short hook is 135 mm.

Images