Compact classroom desks

Abstract

The intensively formed classroom desk includes a desktop, a belly, and a table leg. The horizontal side strips on the upper sides of the belly are fixed to the desktop. It also includes: the vertical roll tubes a at the two ends of the near side of the belly are on the top of the desktop and against the horizontal bottom plate of the belly, and the upper ends of the near side table legs are against the horizontal bottom plate of the belly and fixed; the front left and right ends of the horizontal bottom plate of the belly are directly or indirectly connected to the front side table legs, and the upper ends of the table legs are against the desktop; the front left and right corners of the horizontal bottom plate of the belly are reserved with notches, and the front side table legs are against the desktop through the notches; a horizontal roll tube b is provided between the notches at both ends, and the two ends of the roll tube b are fixed to the front side table legs. This design uses sheet metal technology to exquisitely construct the belly parts and the combination of the belly and the legs, reshapes and simplifies the gravity conduction route, significantly saves materials and labor hours, and makes the product appearance simpler.

Description

Technical Field

[0001] The invention relates to supplies for primary and secondary school students, namely, intensively formed classroom desks. Background Art

[0002] At present, the student desks in primary and secondary school classrooms can be roughly divided into three categories according to the main structural materials used: the first category is wooden structure, which has a relatively rough structure and rare exquisite workmanship. It is easy to be damaged due to the material and structure. The second category is plastic structure, which has a very simple structure and a low cost advantage. The third category is steel-wood structure, which is the most widely used in the market and most of the materials can be recycled and reused. The wooden table panel has a U-shaped steel table belly sandwiched between the ordinary carbon steel table legs. The horizontal side strips on the upper sides of the table belly are turned outward and hung on the table top and table legs. At the upper end of the legs, there are no less than two horizontal rods (tubes) welded between adjacent table legs. The overall strength is reliable but the material is not economical. The weight of the items in the table belly is transferred upward from the table belly to the top of the table legs and the table top, or horizontally to the horizontal rods (tubes) between the table legs. The overall force routes are disordered and overlapping, and the components are roughly made (for example, there are many pipes such as table legs, which are generally cut by ordinary cutting machines). If the size of the components is not precise, they need to be filled with fillers during welding. There are many welding parts and they are exposed. The workshop cost has been high for a long time and the appearance is rough. Summary of the invention

[0003] The task of the invention is to provide a classroom desk with sufficient structural strength and simple appearance.

[0004] The design scheme of the present invention is a intensively formed classroom desk, comprising a desktop, a carbon steel thin plate table belly, and steel table legs. The upper sides of both ends of the table belly are provided with horizontal side strips and a series of through holes. The screws pass through the holes to fix the horizontal side strips to the bottom side of the desktop, and it also includes:

[0005] The near side extension area of ​​the vertical surfaces at both ends of the table belly is rolled to obtain a vertical coil tube a, the vertical coil tube a supports the table top and the horizontal bottom plate of the table belly, and the upper end of the near side table leg supports the horizontal bottom plate of the table belly for fixing;

[0006] Notches are reserved at the left and right corners of the front side of the horizontal bottom plate of the table belly, and the front table legs are pressed upward against the table top through the notches;

[0007] The horizontal rolled tube b obtained by rolling the forward extension area of ​​the horizontal bottom plate of the table belly is located between the left and right notches, and the two ends of the horizontal rolled tube b are fixed to the front table legs;

[0008] The roll groove c is an independent rolled part or is obtained by rolling the proximal extension area of ​​the horizontal bottom plate of the table belly. The end of the roll groove c is fixed to the proximal table leg, and the upper end of the roll groove c is fixed to the horizontal bottom plate of the table belly.

[0009] The front vertical side strips at both ends of the table belly are fixed to the front table legs.

[0010] The filler beam on the inner side or outer side of the table belly is fixed between the lower end of the coil tube a and the upper end of the near side table leg.

[0011] The horizontal bottom plate of the table belly and / or the vertical surfaces at both ends of the table belly are pressed with reinforcing ribs.

[0012] This design uses laser cutting to accurately cut materials, and uses digital display sheet metal technology to delicately express the table belly parts and their combination with the table legs, simplifying and reshaping the gravity transmission route, transforming the table belly from a traditional load outputter to a collaborator in building the structural strength of the desk, saving more than 40% of structural pipes compared to traditional similar desks; the connections between the table belly and the table legs are relatively hidden, and almost no polishing is required after laser welding, which greatly reduces the workshop labor cost; under the premise of equal horizontal periphery, the table belly space is increased and the product appearance is extremely simple. The structural strength of this design desk has been proven to meet practical requirements after trial.

[0013] Innovation in daily application design should be based on maintaining the integrity. Looking at the evolution of classroom desk structures over the past thirty years, this design that adheres to the concept of industrial design is one of the most outstanding ones. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1a This is a visual diagram of the design table from a certain perspective. Figure 1b yes Figure 1a A view of Figure 1c yes Figure 1a Intuitive picture of the table belly from a reverse perspective. Figure 1d yes Figure 1c The b-direction view, Figure 1e This is the plan view of the table belly of this design. Figure 1f It is a state diagram during the table belly rolling process.

[0015] Figure 2 The roll groove c is an independent component.

[0016] Figure 3a It is the table leg support structure of the desk of this design including the independent roll groove c. Figure 3b is Figure 3a An intuitive diagram of the combination of the table belly and the table leg support structure based on this design.

[0017] Figure 4a This is a visual diagram of the design desk. Figure 4b yes Figure 4a E-view plan. DETAILED DESCRIPTION

[0018] Example. The application scenario of this design desk product is the classroom of primary and secondary schools. Figure 4a-b: The product includes a wooden table top (1), and a plurality of blind holes are prefabricated on the bottom surface of the table top (1), so that the internal and external thread nuts can be screwed into the blind holes for use (an appropriate amount of strong structural glue can be pre-injected into the blind holes); the product also includes carbon steel table legs (4) standing upright on the ground, and the table legs (4) bear the weight of the table top (1) and the table belly (2) themselves and the weight they carry.

[0019] See also Figure 2 and Figure 3a -b: The roll groove c (27) can be an independent part, and its two ends are connected between the left and right table legs (4) on the near side of the desk. The front and rear table legs (4) on the left and right ends are each connected by a side middle rod (5), and the two side middle rods (5) are of the same height. It can be seen that when the table belly (2) and the table top (1) are not involved in the assembly, the four table legs (4) have been connected as a whole. Even if the roll groove c (27) is not an independent part, it is rolled from the extended area of ​​the horizontal bottom plate (21) on the near side of the table belly (2) (the side where the students using the desk sit, the "front side" of the table belly (2) below refers to the other side opposite to the "near side" of the table belly (2)) (see Figure 1b The lower right part), because its two ends are also connected between the two upper ends of the near side table legs (4), it does not affect the four table legs (4) still forming a whole, see and compare Figure 3a and Figure 1b .

[0020] See also Figure 1a -f: The table belly (2) is formed by a sheet metal process of a carbon steel thin plate. Horizontal side strips (23) are provided on the upper sides of the left and right ends of the table belly (2). The horizontal side strips (23) are provided with a plurality of through holes (231). A roll tube a (24) is rolled out in the proximal extension area of ​​the vertical surfaces (22) at both ends of the table belly. The upper end of the roll tube a (24) abuts against the top of the table top plate (1), and the lower end is welded to the horizontal bottom plate (21) of the table belly.

[0021] Figure 1e The middle dotted line is the marking line for the rolling position of the table belly workpiece. Figure 1e -f: If the vertical surfaces (22) at the left and right ends of the table belly and the horizontal side strips (23) on the upper side of the vertical surfaces are so-called "upward" rolling, then the coil tube b (26) rolled by the front extension area of ​​the horizontal bottom plate (21) of the table belly, the "flattening" (a rolling process term, the purpose of forming is to prevent people from hurting their hands by the edges of the products that they often touch) formed by the near extension area of ​​the horizontal bottom plate (21) of the table belly, and the coil groove c ( Figure 1e The area without rolling groove c(27) is shown in Figure 1b The lower right part) is rolled "downward" (see Figure 1f The arrows c and d in the figure indicate the directions of the vertical side strips (28) at the front left and right ends of the table belly (2). 、The coiled tube a (24) near the left and right ends of the table belly (2) is rolled vertically in the space. After the above-mentioned horizontal coiled tube b (26) and the vertical side strip (28) on the front side of the table belly (2) are rolled, the left and right ends of the horizontal bottom plate (21) of the table belly are automatically reserved, and the front left and right table legs (4) are arranged to pass through the gaps (25) (the two sides of the gaps (25) are welded to the table legs (4)) until they hit the table top (1). The upper end of the near side table leg (4) is against the horizontal bottom plate (21) of the table belly and is fixedly connected (welded), and is separated from the lower end of the coiled tube a (24) by a layer of horizontal bottom plate (21) but the horizontal distance is very close.

[0022] See also Figure 3b , Figure 4a The outer sides of the left and right vertical surfaces of the table belly (2) and the outer sides of the left and right table legs (4) are located in the same plane. The design of the desk is simpler in appearance than the traditional steel-wood desk.

[0023] See also Figure 4a The filler beam (3) is a box-shaped rectangular parallelepiped made of thin plate (3 faces, matched with the vertical face of the near side table legs, the lower bottom face of the horizontal bottom plate (21) of the table belly, and the vertical face of the end of the table belly, forming a six-face tubular cavity), all of which are perpendicular to each other and are located in a bilaterally symmetrical position in the table belly (2); see Figure 3b The filler beam (3) can also be welded to the outer lower side of the horizontal bottom plate (21) of the table belly (in this case, there are four surfaces, which cooperate with the vertical surface of the near side table leg and the lower bottom surface of the horizontal bottom plate (21) of the table belly to form a six-sided tube cavity). Regardless of the position, the function of the horizontal filler beam (3) is to strengthen the reliability of the force transfer between the lower end of the coil tube a (24) and the upper end of the near side table leg (4). The filler beam (3) is small in size, low in cost, and has a significant effect.

[0024] The material of the desk belly (2) developed by the applicant is relatively thin. After testing the desk sample without the filler beam (3), when the desk belly (2) is full of books and the student lies on the desk top (1) to take a nap, the structural strength of the desk can still meet the normal use. However, teenagers are very lively and it cannot be ruled out that students will sit on the edge of the desk or stand on the desk to play and frolic. It cannot be guaranteed that the part of the desk belly (2) where the filler beam (3) is not arranged will not be deformed.

[0025] Under the premise of ensuring structural strength and saving materials so as to use thinner materials, the reinforcing ribs pressed on the horizontal bottom plate (21) of the table belly and the vertical surfaces (22) at both ends of the table belly have a significant effect.

[0026] From laser cutting of carbon steel pipes and carbon steel plates, rolling of carbon steel plates, CNC production of tabletop wood boards, to designated laser welding and assembly, the entire production process of this design and structure is supported by digital display equipment (primary digitalization) technology. Among them, the high-precision intensively formed table belly (2) is the core structure of this design desk.

[0027] In the desk of this design, the weight of the items in the table belly is mainly transmitted to the near side table legs through the coil a, transmitted to the ground, and then transmitted to the ground through the front vertical side strips (28) at both ends of the table belly welded to the side elevation of the front side table legs. It can be seen that the gravity transmission route of this design is simple.

[0028] The main production and assembly process of this design desk product:

[0029] ① Preparation and cutting of pipe fittings such as 4 table legs (4) and 2 side center rods (5) (using laser cutting to obtain accurate and consistent height of the table legs (4) to ensure that the table top is horizontal);

[0030] ② Cutting the sheet metal (laser cutting) for making the table belly (2), including marking the rolling position and obtaining a series of through holes (see Figure 1e );

[0031] ③ Forming of the table belly (2): including rolling the horizontal side strips (23) on the upper side of the table belly (2), the vertical surfaces (22) at both ends of the table belly (2), the horizontal roll tube b (26) on the front side of the table belly (2) and the vertical side strips (28) on the front side of the vertical surfaces at both ends, the near side roll tube a (24), including the roll groove c (27) rolled on the near side extension area of ​​the horizontal bottom plate of the table belly (2) (the roll groove c (27) can also be an independent part);

[0032] ④ Under the clamping of the overall positioning tool, the four table legs (4), the two side center rods (5), the table belly (2) and the roll groove c (27) are integrated into a one-time continuous welding process, specifically including: welding the two side center rods (5) to the left and right table legs (4); welding the front vertical side strips (28) at both ends of the table belly (2) to the front side table legs (4); welding one side of the horizontal roll tube b (26) to the horizontal bottom plate (21) of the table belly; welding the horizontal roll tube b (2 6) The two ends and the edges of the two corner notches (25) on the front side of the table belly horizontal bottom plate (21) are welded to the two front table legs (4); including the welding of the upper ends of the two near side table legs (4) against the lower side of the table belly horizontal bottom plate (21), the welding of the upper opening (271) of the independent part roll groove c and the lower side of the table belly horizontal bottom plate (21), the welding of the two ends (272) of the roll groove c and the near side table legs (4), including the welding of the lower end of the roll tube a (24) and the table belly horizontal bottom plate (21);

[0033] ⑤Surface treatment of the above integrated molding (such as spraying process, white);

[0034] ⑥ (The table top is outsourced as a table component) Each screw passes through the through holes (231) on the upper sides of the two ends of the table belly (2) and is screwed to the internal and external thread nuts fixed on the lower side of the table top (1), thereby fixing the horizontal side strip (23) to the table top (1).

[0035] The assembly method of this designed desk is simple and reliable, meeting the students' long-term use requirements.

Claims

1. The classroom desk is formed in an integrated manner, including a desktop, a carbon steel thin plate table belly, and steel table legs. The upper sides of both ends of the table belly are provided with horizontal side strips and a series of through holes. The screws pass through the holes to fix the horizontal side strips to the bottom side of the desktop. The characteristics are: : The vertical roll tubes a at both ends of the near side of the table belly are placed on the top of the table top and on the horizontal bottom plate of the table belly. The upper ends of the near side table legs are placed on the horizontal bottom plate of the table belly and fixed. The left and right ends of the front side of the horizontal bottom plate of the table belly are directly or indirectly connected to the front side table legs, and the upper ends of the table legs are against the table top plate.

2. The intensively formed classroom desk according to claim 1 is characterized by: Notches are reserved at the left and right front corners of the horizontal bottom plate of the table belly, and the front table legs are supported upward on the table top through the notches; a horizontal rolling tube b is arranged between the notches at both ends, and both ends of the rolling tube b are fixed to the front table legs.

3. The intensively formed classroom desk according to claim 1 is characterized by: The vertical coil a is obtained by rolling the proximal extension area of ​​the vertical surfaces at both ends of the table belly, and the horizontal coil b is obtained by rolling the forward extension area of ​​the horizontal bottom plate of the table belly.

4. The intensively formed classroom desk according to claim 1 is characterized in that: Groove c is an independent rolled part or is obtained by rolling the proximal extension area of ​​the horizontal bottom plate of the table belly. The end of the rolled groove c is fixed to the proximal table leg, and the upper end of the rolled groove c is fixed to the horizontal bottom plate of the table belly.

5. The intensively formed classroom desk according to claim 1 is characterized by: The front vertical side strips at both ends of the table belly and / or the edges of the notch of the horizontal bottom plate of the table belly are fixed to the front table legs.

6. The intensively formed classroom desk according to claim 1 is characterized by: The filler beam on the inner side or outer side of the table belly is fixed between the lower end of the coil tube a and the upper end of the near side table leg.

7. The compact classroom desk according to claim 1 is characterized by: The horizontal bottom plate of the table belly and / or the vertical surfaces at both ends of the table belly are pressed with reinforcing ribs.

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