Counter-force frame
Through the combination of modular design and enhanced components, the existing reaction frame structure is solved, the problems of imbalance, complex construction and insufficient adaptability are achieved, and higher stability, adaptability and load-bearing capacity are achieved, the application scope is expanded and the application is improved. Work efficiency.
Patent Information
- Application Number
- CN202411443597.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-02-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When existing reaction frames provide large reaction forces, the bottom beam connection may lead to structural imbalance, complex on-site construction and inconvenient transportation and installation and disassembly, poor stability, insufficient adaptability, and face different sizes and types. When working parts are used, poor adaptability may lead to structural deformation and damage.
A modular design of the reaction frame includes main column assembly, oblique brace assembly, reinforcement assembly, pivoting rod assembly, horizontal tie rod assembly, vertical tie rod assembly and small reaction frame assembly, through the combination of these components, it provides stable support. and adjust the accuracy and increase the support strength of the slash frame by strengthening the assembly.
Improve the stability and adaptability of the reaction frame, enhance its load-bearing capacity, simplify the installation and disassembly process, improve work efficiency, reduce engineering and post-maintenance costs, and expand its application range to vehicle collision simulation, aviation Spacecraft component testing and other fields.
Smart Images

Figure CN119394761A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of reaction frames, in particular to a reaction frame. Background Art
[0002] The reaction frame is a mechanical engineering and structural testing equipment. In the fields of material mechanical properties testing, building structure safety assessment and vehicle collision simulation, the reaction frame is a key equipment used to support and resist the huge reaction force generated during the test process.
[0003] However, in actual use, although the current reaction frame can provide a large reaction force, the connection with the bottom beam may cause structural imbalance; the artificial support used on site is complex in structure, inconvenient to transport and install and disassemble, and has poor stability, which makes it easy to make errors during installation; when faced with workpieces of different sizes and types, it has poor adaptability and other deficiencies, which limits its application scope and efficiency; at the same time, when the diagonal brace is under long force, its own supporting strength is limited, which may cause structural deformation and damage. These are actual problems that need to be solved urgently. Summary of the invention
[0004] The purpose of the present invention is to provide a reaction frame to solve the problems raised in the above background technology that although the current reaction frame can provide a large reaction force, the connection of the bottom beam may cause structural imbalance; the use of manual support on site has a complex structure, inconvenient transportation and installation and disassembly, and poor stability, which makes it easy to make errors during installation; when facing workpieces of different sizes and types, it has poor adaptability and other deficiencies, which limits its application scope and efficiency; at the same time, when the diagonal brace is under long force, its own supporting strength is limited, which may cause structural deformation and damage.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: comprising a main column assembly, a diagonal brace assembly arranged on both sides of the main column assembly, a reinforcement assembly arranged on the side of the main column assembly, a diagonal tie rod assembly, a horizontal tie rod assembly and a vertical tie rod assembly arranged on the side of the reinforcement assembly in sequence, and a small reaction frame assembly arranged on the side wall of the horizontal tie rod assembly;
[0006] in:
[0007] A main column assembly, the main column assembly comprising columns, each of which is provided with a square H-shaped steel plate at the bottom, a top beam is provided on the inner side of the column, a bottom beam is provided at the bottom of the square H-shaped steel plate, a jack is provided at the bottom of the bottom beam, and a specimen column is provided between the top beam and the bottom beam;
[0008] A diagonal brace assembly, wherein the diagonal brace assembly comprises a diagonal brace frame combined with the column, and a frame groove is reserved on the side wall of the diagonal brace frame;
[0009] A reinforcement assembly, the reinforcement assembly comprising a reinforcement rod 1 and a reinforcement rod 2 penetrating the frame slot, the ends of the reinforcement rod 1 and the reinforcement rod 2 being aligned with the column;
[0010] An inclined tie rod assembly, wherein the inclined tie rod assembly is arranged on a side wall of the specimen column;
[0011] A horizontal tie rod assembly, wherein the horizontal tie rod assembly is arranged at the end of the oblique tie rod assembly;
[0012] A vertical tie rod assembly, the vertical tie rod assembly being arranged at the connection between the oblique tie rod assembly and the horizontal tie rod assembly;
[0013] A small reaction frame assembly is arranged on the side wall of the horizontal pull rod assembly. The small reaction frame assembly includes a small reaction frame column, a rib plate 2 welded in the small reaction frame column, a small reaction frame column end plate welded to the bottom of the small reaction frame column, and a small reaction frame column diagonal brace arranged on the side wall of the small reaction frame column.
[0014] Preferably, a main column top connecting plate is provided at the top of the main column assembly, and a diagonal brace top connecting plate is provided at the side wall of the main column assembly.
[0015] Preferably, the inner wall of the square H-shaped steel bar plate is provided with a plurality of groups of rib plates welded at equal intervals.
[0016] Preferably, a specimen column positioning plate is provided on the side wall of the specimen column, and a welding surface is reserved at the connection between the specimen column and the specimen column positioning plate.
[0017] Preferably, a diagonal brace bottom connecting plate is provided at the bottom of the diagonal brace frame.
[0018] Preferably, a clamping plate 1 is provided at one end of the reinforcing rod 1, and a clamping plate 2 is provided at the other end, a mounting plate 1 is welded to the side wall of the clamping plate 1, and a plurality of limit bolts penetrating the column are provided on the side wall of the mounting plate 1.
[0019] Preferably, a mounting plate 2 is welded to the bottom of the clamping plate 2, a mounting plate 3 is provided at the end of the reinforcing rod 2, and the overall structure of the mounting plate 3 is the same as that of the mounting plate 1.
[0020] Preferably, the inclined brace assembly comprises an inclined brace, the top of the inclined brace is connected to an inclined brace mounting head via a pin shaft, and the side wall of the inclined brace mounting head is connected to the specimen column.
[0021] Preferably, the horizontal tie rod assembly comprises a horizontal frame, and a side wall of the horizontal frame is provided with a horizontal frame mounting head connected to the inclined bracket.
[0022] Preferably, the vertical pull rod assembly comprises a vertical frame, and a vertical frame mounting head is arranged on the top of the vertical frame.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] 1. This type of reaction frame, through the combination of accessories, uses the main column beam to provide support to fix the equipment in the site; at the same time, the tie rod combination, composed of horizontal tie rods, inclined tie rods and vertical tie rods, provides transmission force and controls the movement process; followed by a small reaction frame to provide reaction force; with a jack stand, combined with the bottom beam, it provides sufficient support and adjustment accuracy;
[0025] 2. This type of reaction frame adopts a modular design concept through the combination of accessories. Each component can be quickly disassembled and assembled, which is convenient for adjusting the structure and size of the reaction frame according to the test requirements, improving the flexibility and adaptability of the equipment, improving the stability and adaptability of the reaction frame, improving work efficiency, shortening the working time, and reducing engineering and later maintenance costs. Through innovative mechanical structure design, such as the use of high-strength alloy materials, optimizing the support structure layout and adding adaptive stabilization devices, the overall stability and bearing capacity of the reaction frame are significantly improved. The reaction frame is not only suitable for conventional mechanical performance tests, but also can be expanded to vehicle collision simulation, aerospace component testing, building component loading and other fields by replacing different accessories or modules. The versatility enables the reaction frame to adapt to more diverse testing needs and improve equipment utilization;
[0026] 3. This type of reaction frame, through the combined use of accessories, sets a reinforcement component in the diagonal brace frame. The reinforcement rods 1 and 2 in the reinforcement component can be effectively matched with the mounting plate to achieve three-point positioning and fixation, thereby increasing the support strength of the diagonal brace frame itself under the same distance and space conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. 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 creative labor. Among them:
[0028] Figure 1 It is a schematic diagram of the overall structure of the reaction frame of the present invention;
[0029] Figure 2 It is a side view schematic diagram of the main column of the reaction frame of the present invention;
[0030] Figure 3 It is a side view schematic diagram of the diagonal brace assembly of the reaction frame of the present invention;
[0031] Figure 4 It is a three-dimensional schematic diagram of the reinforcement component of the reaction frame of the present invention;
[0032] Figure 5 It is a side schematic diagram of the reinforcement component of the reaction frame of the present invention;
[0033] Figure 6 It is a schematic diagram of the inclined tie rod assembly of the reaction frame of the present invention;
[0034] Figure 7 It is a schematic diagram of the horizontal pull rod assembly of the reaction frame of the present invention;
[0035] Figure 8 It is a schematic diagram of a vertical pull rod assembly of a reaction frame of the present invention;
[0036] Fig. 9 It is a detailed schematic diagram of the small reaction frame assembly of the reaction frame of the present invention.
[0037] In the figure: 100, main column assembly; 110, main column top connection plate; 120, diagonal brace top connection plate; 130, square H-shaped steel plate; 131, rib plate 1; 140, top beam; 150, bottom beam; 160, jack; 170, specimen column; 180, specimen column positioning plate; 200, diagonal brace assembly; 210, diagonal brace frame; 220, frame groove; 230, diagonal brace bottom connection plate; 300, reinforcement assembly; 310, reinforcement rod 1; 320, clamping plate 1; 330, mounting plate 1; 340, limit bolt; 350, clamp plate 2; 360, mounting plate 2; 370, reinforcing rod 2; 380, mounting plate 3; 400, diagonal tie rod assembly; 410, diagonal bracket; 420, diagonal bracket mounting head; 500, horizontal tie rod assembly; 510, horizontal bracket; 520, horizontal bracket mounting head; 600, vertical tie rod assembly; 610, vertical bracket; 620, vertical bracket mounting head; 700, small reaction frame assembly; 710, small reaction frame column; 720, rib plate 2; 730, small reaction frame column end plate; 740, small reaction frame column diagonal brace. DETAILED DESCRIPTION
[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0039] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.
[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] The present invention provides a reaction frame, which uses a main column beam to provide support to fix the equipment in the field; at the same time, the pull rod combination, which is composed of a horizontal pull rod, an inclined pull rod and a vertical pull rod, provides transmission force and controls the movement process; followed by a small reaction frame to provide reaction force; with a jack frame, combined with the bottom cross beam, sufficient support and adjustment accuracy are provided, and a modular design concept is adopted. Each component can be quickly disassembled and assembled, which is convenient for adjusting the structure and size of the reaction frame according to test requirements, thereby improving the flexibility and adaptability of the equipment, improving the stability and adaptability of the reaction frame, improving work efficiency, shortening the working time, reducing engineering and later maintenance costs, and through innovative mechanical structure design, such as The use of high-strength alloy materials, optimized support structure layout and additional adaptive stabilization devices significantly improve the overall stability and load-bearing capacity of the reaction frame. The reaction frame is not only suitable for conventional mechanical performance tests, but can also be expanded to vehicle collision simulation, aerospace component testing, building component loading and other fields by replacing different accessories or modules. The versatility enables the reaction frame to adapt to more diverse testing needs and improve equipment utilization. A reinforcement component is set in the diagonal support frame. The reinforcement rods 1 and 2 in the reinforcement component can be effectively used with the mounting plate to achieve three-point positioning and fixation. Under the same distance and space conditions, the support strength of the diagonal support frame itself is increased. Please refer to Figures 1 to 9 , including a main column assembly 100, a diagonal brace assembly 200 arranged on both sides of the main column assembly 100, a reinforcement assembly 300 arranged on the side of the main column assembly 100, a diagonal tie rod assembly 400, a horizontal tie rod assembly 500 and a vertical tie rod assembly 600 arranged on the side of the reinforcement assembly 300 in sequence, and a small reaction frame assembly 700 arranged on the side wall of the horizontal tie rod assembly 500;
[0042] The main column assembly 100 includes columns, each of which is provided with a square H-shaped steel plate 130 at the bottom, each of which has the same structure, a top beam 140 is provided on the inner side of the column, a bottom beam 150 is provided at the bottom of the square H-shaped steel plate 130, a jack 160 is provided at the bottom of the bottom beam 150, the jack 160 includes a jack bottom column, the bottom of the jack bottom column is fixedly connected with a jack bottom column end plate by bolts, the bottom of the jack bottom column end plate is provided with a jack bottom beam, the jack bottom column and the jack bottom beam are both made of H-shaped steel, and a specimen column 170 is provided between the top beam 140 and the bottom beam 150;
[0043] The diagonal brace assembly 200 includes a diagonal brace frame 210 combined with a column, and a frame groove 220 is reserved on the side wall of the diagonal brace frame 210. The frame groove 220 is a top-down structure, and the reinforcement assembly 300 can be installed in this structure;
[0044] The reinforcement assembly 300 includes a reinforcement rod 1 310 and a reinforcement rod 2 370 penetrating the frame slot 220. The reinforcement rod 1 310 and the reinforcement rod 2 370 are solid metal rods. The ends of the reinforcement rod 1 310 and the reinforcement rod 2 370 are aligned with the column to support the side of the column.
[0045] The inclined tie rod assembly 400 is fixed to the side wall of the specimen column 170 by bolts;
[0046] The horizontal tie rod assembly 500 is fixed to the end of the diagonal tie rod assembly 400 by bolts;
[0047] The vertical tie rod assembly 600 is fixed at the connection between the diagonal tie rod assembly 400 and the horizontal tie rod assembly 500;
[0048] The inclined tie rod assembly 400, the horizontal tie rod assembly 500 and the vertical tie rod assembly 600 are mutually sleeved, and all of them are provided with corresponding holes and grooves for easy mutual assembly, and the assembly process can use bolts or pins;
[0049] The small reaction frame assembly 700 is arranged on the side wall of the horizontal pull rod assembly 500. The small reaction frame assembly 700 and the column are both installed vertically, and the two are kept parallel. The small reaction frame assembly 700 includes a small reaction frame column 710, a rib plate 2 720 welded in the small reaction frame column 710, and the number of the rib plate 2 720 is multiple, which can increase the strength of the small reaction frame column 710, a small reaction frame column end plate 730 welded to the bottom of the small reaction frame column 710, and a small reaction frame column diagonal brace 740 arranged on the side wall of the small reaction frame column 710, and the small reaction frame column diagonal brace 740 has a metallic brightness;
[0050] In some embodiments, in order to ensure the strength of the small reaction frame column diagonal brace 740 itself, the reinforcement assembly 300 may also be disposed in the small reaction frame column diagonal brace 740;
[0051] In addition, the conventional accessories and conventional structures involved in the present invention are all prior art, and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to the internal structure and method;
[0052] Working principle: In specific use, the main column assembly 100 is used to form the entire frame structure, and the main column top connection plate 110 is combined. The bottom of the column has a square H-shaped steel plate 130, and the column is combined with a top beam 140 and a bottom beam 150, and a jack 160 and a specimen column 170 are set at the position of the bottom beam 150. The side wall of the specimen column 170 is sequentially provided with an inclined rod assembly 400, a horizontal rod assembly 500 and a vertical rod assembly 600, and a small reaction frame assembly 7 is set on the side of the horizontal rod assembly 500. 00, the small reaction frame assembly 700 includes a small reaction frame column 710 and a small reaction frame column diagonal brace 740 on the side wall of the small reaction frame column 710 and other structures. At the same time, a reinforcing assembly 300 is arranged on the side of the diagonal brace frame 210, and a reinforcing rod 1 310 and a reinforcing rod 2 370 are arranged on the mounting plate 2 360 of the reinforcing assembly 300. The end of the reinforcing rod 1 310 is connected to the mounting plate 1 330, and the end of the reinforcing rod 2 370 is connected to the mounting plate 3 380. The mounting plate 1 330 and the mounting plate 3 380 are both connected to the column, which effectively ensures the supporting strength.
[0053] At the same time, in order to facilitate external combination and coordination, specifically, a main column top connecting plate 110 is provided at the top of the main column assembly 100 , and a diagonal brace top connecting plate 120 is provided at the side wall of the main column assembly 100 .
[0054] Subsequently, in order to increase the strength of the square H-shaped steel plate 130 itself, specifically, the inner wall of the square H-shaped steel plate 130 is provided with a plurality of groups of rib plates 131 welded at equal intervals.
[0055] Next, in order to facilitate on-site welding by the purchaser, specifically, a specimen column positioning plate 180 is provided on the side wall of the specimen column 170 , and a welding surface is reserved at the connection between the specimen column 170 and the specimen column positioning plate 180 .
[0056] Furthermore, in order to facilitate the connection and fixation of the diagonal bracing frame 210 , specifically, a diagonal bracing bottom connecting plate 230 is provided at the bottom of the diagonal bracing frame 210 .
[0057] Next, in order to facilitate the assembly of the reinforcing rod 310 and to facilitate the fixing of the mounting plate 330 on the side of the column, specifically, a clamping plate 320 is provided at one end of the reinforcing rod 310, and a clamping plate 350 is provided at the other end. The side wall of the clamping plate 320 is welded with the mounting plate 330, and the side wall of the mounting plate 330 is provided with a plurality of limit bolts 340 that penetrate the column.
[0058] Subsequently, in order to facilitate the fixation of the mounting plate 2 360 and the mounting plate 3 380 and to stabilize the strength of the reinforcing assembly 300, specifically, the mounting plate 2 360 is welded to the bottom of the clamping plate 2 350, and the mounting plate 3 380 is provided at the end of the reinforcing rod 2 370. The overall structure of the mounting plate 3 380 is the same as the overall structure of the mounting plate 1 330. The mounting plate 2 360 is fixed to the ground or the diagonal support frame 210 by bolts to ensure the gripping ability.
[0059] It is worth noting that in order to ensure the combination effect of the inclined tie rod assembly 400, specifically, the inclined tie rod assembly 400 includes an inclined tie frame 410, the top of the inclined tie frame 410 is connected to a inclined tie frame mounting head 420 through a pin shaft, and the side wall of the inclined tie frame mounting head 420 is connected to the specimen column 170.
[0060] Next, in order to ensure the combination effect of the horizontal tie rod assembly 500 , specifically, the horizontal tie rod assembly 500 includes a horizontal frame 510 , and a horizontal frame mounting head 520 connected to the inclined bracket 410 is provided on a side wall of the horizontal frame 510 .
[0061] Finally, in order to ensure the combination effect of the vertical rod assembly 600 , specifically, the vertical rod assembly 600 includes a vertical frame 610 , and a vertical frame mounting head 620 is disposed at the top of the vertical frame 610 .
[0062] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A reaction frame, characterized in that: The invention comprises a main column assembly (100), a diagonal brace assembly (200) arranged on both sides of the main column assembly (100), a reinforcement assembly (300) arranged on the side of the main column assembly (100), a diagonal tie rod assembly (400) arranged in sequence on the side of the reinforcement assembly (300), a horizontal tie rod assembly (500) and a vertical tie rod assembly (600), and a small reaction frame assembly (700) arranged on the side wall of the horizontal tie rod assembly (500); in: A main column assembly (100), the main column assembly (100) comprising columns, each of the columns being provided with a square H-shaped steel plate (130) at the bottom, a top beam (140) being provided inside the column, a bottom beam (150) being provided at the bottom of the square H-shaped steel plate (130), a jack (160) being provided at the bottom of the bottom beam (150), and a specimen column (170) being provided between the top beam (140) and the bottom beam (150); A diagonal brace assembly (200), the diagonal brace assembly (200) comprising a diagonal brace frame (210) combined with the column, and a frame groove (220) is reserved on a side wall of the diagonal brace frame (210); A reinforcement assembly (300), the reinforcement assembly (300) comprising a reinforcement rod 1 (310) and a reinforcement rod 2 (370) penetrating the frame slot (220), the ends of the reinforcement rod 1 (310) and the reinforcement rod 2 (370) being aligned with the column; An oblique tie rod assembly (400), wherein the oblique tie rod assembly (400) is arranged on a side wall of the specimen column (170); A horizontal tie rod assembly (500), wherein the horizontal tie rod assembly (500) is arranged at the end of the inclined tie rod assembly (400); A vertical tie rod assembly (600), wherein the vertical tie rod assembly (600) is arranged at the connection between the oblique tie rod assembly (400) and the horizontal tie rod assembly (500); A small reaction frame assembly (700), wherein the small reaction frame assembly (700) is arranged on the side wall of the horizontal pull rod assembly (500), and the small reaction frame assembly (700) includes a small reaction frame column (710), a rib plate 2 (720) welded inside the small reaction frame column (710), a small reaction frame column end plate (730) welded to the bottom of the small reaction frame column (710), and a small reaction frame column diagonal brace (740) arranged on the side wall of the small reaction frame column (710).
2. The reaction frame according to claim 1, characterized in that: A main column top connection plate (110) is provided at the top of the main column assembly (100), and a diagonal brace top connection plate (120) is provided at the side wall of the main column assembly (100).
3. The reaction frame according to claim 2, characterized in that: The inner wall of the square H-shaped steel bar plate (130) is provided with a plurality of groups of rib plates (131) welded at equal intervals.
4. The reaction frame according to claim 3, characterized in that: A specimen column positioning plate (180) is provided on the side wall of the specimen column (170), and a welding surface is reserved at the connection between the specimen column (170) and the specimen column positioning plate (180).
5. The reaction frame according to claim 4, characterized in that: A diagonal brace bottom connecting plate (230) is provided at the bottom of the diagonal brace frame (210).
6. The reaction frame according to claim 5, characterized in that: A clamping plate 1 (320) is provided at one end of the reinforcing rod 1 (310), and a clamping plate 2 (350) is provided at the other end. A mounting plate 1 (330) is welded to the side wall of the clamping plate 1 (320), and a plurality of limit bolts (340) penetrating the column are provided on the side wall of the mounting plate 1 (330).
7. The reaction frame according to claim 6, characterized in that: A mounting plate 2 (360) is welded to the bottom of the second clamping plate (350), and a mounting plate 3 (380) is provided at the end of the second reinforcing rod (370). The overall structure of the mounting plate 3 (380) is the same as that of the mounting plate 1 (330).
8. The reaction frame according to claim 7, characterized in that: The inclined brace assembly (400) comprises an inclined brace (410), the top of which is connected to an inclined brace mounting head (420) via a pin shaft, and the side wall of the inclined brace mounting head (420) is connected to the specimen column (170).
9. The reaction frame according to claim 8, characterized in that: The horizontal tie rod assembly (500) comprises a horizontal frame (510), and a side wall of the horizontal frame (510) is provided with a horizontal frame mounting head (520) connected to the inclined bracket (410).
10. The reaction frame according to claim 9, characterized in that: The vertical pull rod assembly (600) comprises a vertical frame (610), and a vertical frame mounting head (620) is arranged at the top of the vertical frame (610).