CN216569126U

CN216569126U - Use dismantled and assembled wood seat of mortise and tenon joint structural bonding

Info

Publication number: CN216569126U
Application number: CN202121819599.3U
Authority: CN
Inventors: 王世浩
Original assignee: Guangzhou Naiao Furniture Co ltd
Current assignee: Guangzhou Naiao Furniture Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-05-24
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a solid wood seat combining a tenon-and-mortise structure with disassembly, which is formed by splicing 17 pieces of parts, wherein the end surfaces of the parts are square solid wood battens with different lengths, 4 solid wood boards with the same thickness and different sizes, and the tenon-and-mortise structure is easy to manufacture completely by adopting a machining mode. The utility model can realize modularized mass production, is convenient to disassemble and assemble, and can realize plane transportation, thereby reducing the cost; the requirements of consumers with different body types on the optimal use comfort can be met, so that the solid wood seat is customized according with the ergonomics, and meanwhile, if parts are damaged, the solid wood seat can be conveniently replaced, and the service life of the solid wood seat is prolonged; can realize letting the consumer dismouting by oneself, when letting it have the sense of participation, still help propagating and propagating to this kind of outstanding tradition wood culture of tradition tenon fourth of twelve earthly branches structure and super fabrication skill.

Description

Use dismantled and assembled wood seat of mortise and tenon joint structural bonding

Technical Field

The utility model belongs to the technical field of solid wood furniture, relates to a solid wood seat, and particularly relates to a solid wood seat with a tenon-and-mortise structure combined and disassembled.

Background

The chair is essential furniture in daily life and mainly comprises chair legs, a seat surface, armrests, a backrest and the like. The solid wood seat is always favored by consumers by adopting natural solid wood as a manufacturing raw material, but the price is always high. Most wood seats in the present stage can not be disassembled and assembled, and the reason is that: on one hand, the traditional solid wood seat is basically connected in a mortise and tenon structure, the traditional mortise and tenon structure is too complex, complete machining is difficult to realize, the manufacturing period is long, and the cost is high; on the other hand, the assembly of the components of the solid wood seat needs a professional assembly tool to be completed by an experienced carpenter master, and the components are difficult to assemble manually after being purchased by a user. Thereby appear traditional wood seat difficult platformization, integration packing, the cost of packing is high, it is inconvenient to store the transportation, increases enterprise's stock and user's transport burden scheduling problem. Although the mode that adopts inside and outside tooth countersunk head nut embedding wood material, then realize connecting different components with bolt locking to make dismantled and assembled wood seat begins to appear on the market at present, the fragile problem after several dismouting can appear in this kind of mode that utilizes metal connecting piece structure to lead to the nut to take out or phenomenon such as timber fracture.

Meanwhile, the damaged parts of the existing solid wood seats cannot rapidly replace corresponding parts, and the repair cost is high, so that some solid wood seats cannot be normally used due to the damaged parts, and the service life of the solid wood seats is shortened; further present wood seat is most because unable better realization dismouting, its size is fixed, can't be through changing the demand that different size consumers are to best use comfort that a small amount of spare parts come better satisfied.

SUMMERY OF THE UTILITY MODEL

In order to reduce the cost, consider the structural joint strength, the appearance modeling and the raw material consumption of the solid wood seat, overcome the problems of difficult plate flattening and integrated packaging, inconvenient storage and transportation, increase of enterprise inventory and user carrying burden, lower service life of furniture, difficult size change and the like, the utility model aims to provide the solid wood seat applying the tenon-and-mortise structure to combine disassembly and assembly, the parts are made by simply performing machine cutting and tenon-and-mortise processing on square wood bars with the same specification and wood plates with the same thickness, and the solid wood seat is easy to industrially produce in batches, thereby realizing the low-cost detachable solid wood seat.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an use dismantled and assembled solid wood seat of mortise and tenon structure combination, is 21 parts altogether for 17 terminal surfaces are square wood flitches not of uniform length, 4 blocks of solid wood planks that the same size of thickness is not of uniform size, by easily adopting the mortise and tenon structure amalgamation of machine tooling's mode preparation completely to form. The 21 parts mainly include: a seat panel, two armrest panels, a back panel, a rear transverse doorjamb, two upper doorjambs, two rear legs, a middle upper doorjamb, two lower doorjambs, a middle lower doorjamb, two middle legs, a front lower doorjamb, two front legs, a front upper doorjamb, and two threading belts. The mortise and tenon structures of the even-numbered components are symmetrically processed, wherein the five battens named as the transverse doorjambs have the same length, and the rear legs and the middle legs have the same length.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, the lower part of the front leg is provided with the cylindrical tenon, the diameter of the cylindrical tenon is half of the side length of the square end surface of the front leg, and the end surface circle of the cylindrical tenon is tangent to the two sides of the square end surface of the front leg and is positioned on the inner side where the two sides are intersected in the longitudinal direction and the transverse direction; the rectangle mortise end face is rectangular, the width of the rectangle mortise end face is half of the side length of the square of the lower side doorjamb end face, and the length of the rectangle mortise end face is the same as the side length of the square of the lower side doorjamb end face. The front parts of the lower side doorjambs are respectively provided with through rectangular mortises above the transverse horizontal direction and on the inner sides in the vertical direction, the end faces of the rectangular mortises are square, the side length of each rectangular mortises is half of the side length of the square of the end faces of the lower side doorjambs, and the two adjacent mortises and the transverse rectangular mortises are close to the front ends; the middle part of the lower side doorjamb is respectively provided with a through rectangular mortise above the transverse horizontal direction and outside the vertical direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square of the end face of the lower side doorjamb, the length of the rectangular mortise is the same as the side length of the square of the end face of the lower side doorjamb, and the transverse rectangular mortise is close to the front end; and the width of the through tenon is one third of the side length of the square of the end face of the lower side doorjamb, the height of the through tenon is the same as the side length of the square of the end face of the lower side doorjamb, and the length of the through tenon is two times of the side length of the square of the end face of the lower side doorjamb. The two sides of the front lower transverse doorjamb are respectively provided with a square tenon, the end face of the square tenon is a half of the side length of the square of the front lower transverse doorjamb end face, and the right upper corner right-angle side of the square tenon end face is superposed with the right upper corner right-angle side of the square of the front lower transverse doorjamb end face. The front two lower side doorjambs are joined together at the front two lower side doorjambs by connecting rectangular mortise openings at the front portions of the front cylindrical tenons and the lower side doorjambs to form a section a.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, the top end of the rear leg is provided with the tenon head of the walking pin; the middle upper part of the rear leg is provided with a cylindrical tenon, the diameter of the cylindrical tenon is half of the side length of the square end surface of the front leg, and the end surface circle of the cylindrical tenon is tangent to the two sides of the square end surface of the front leg and intersects with the outer sides in the longitudinal and transverse directions; the middle of the lower part of the rear leg in the longitudinal horizontal direction is provided with a through tenon mortise, the width of the end face of the through tenon mortise is one third of the side length of the square of the end face of the rear leg, and the height of the end face of the through tenon is the same as the side length of the square of the end face of the rear leg. The front end parts of the upper side doorjambs are provided with through tenon joints in the middle, the width of the through tenon joints is one third of the side length of the square of the end surfaces of the upper side doorjambs, the height of the through tenon joints is the same as the side length of the square of the end surfaces of the upper side doorjambs, and the length of the through tenon joints is two times of the side length of the square of the end surfaces of the upper side doorjambs; the transverse horizontal direction top and the vertical direction inner side of the upper side doorjamb rear portion are respectively provided with a through rectangular mortise, the end face of the rectangular mortise is a square, the side length of the rectangular mortise is half of the side length of the square of the upper side doorjamb end face, and the two mortises are adjacent to each other and the transverse rectangular mortise is close to the rear end. And two sides of the rear transverse doorjamb are respectively provided with a square tenon, the end face of the square tenon is a half of the side length of the square of the rear transverse doorjamb end face, and the left upper corner right-angle side of the square tenon end face is coincided with the left upper corner right-angle side of the square of the rear transverse doorjamb end face. Two rear leg bracing sections and two upper side bracing sections are joined together with the rear transverse bracing sections through the through rectangular mortise at the rear portions of the cylindrical tenons and the upper side bracing sections at the middle portions of the rear legs and the square tenons at the two sides of the rear transverse bracing sections to form a member B.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, the top end of the middle leg is provided with the tenon head of the jack pin; the middle part of the middle upper part of the middle leg in the longitudinal horizontal direction is provided with a through tenon mortise, the width of the end face of the through tenon mortise is one third of the side length of the square of the end face of the middle leg, and the height of the end face of the through tenon mortise is the same as the side length of the square of the end face of the middle leg; a through rectangular mortise is arranged on the outer side of the middle lower part of the middle leg in the transverse horizontal direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square on the end face of the middle leg, and the length of the rectangular mortise is the same as the side length of the square on the end face of the middle leg; the lower end of the middle leg is provided with a through rectangular mortise in the longitudinal horizontal direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square of the end face of the middle leg, and the length of the rectangular mortise is the same as the side length of the square of the end face of the middle leg. The inner sides of the two sides of the middle upper cross bracing structure in the vertical direction are respectively provided with a rectangular mortise which is communicated with each other, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square of the end face of the middle upper cross bracing structure, and the length of the rectangular mortise is the same as the side length of the square of the end face of the middle upper cross bracing structure; the inner lower side of the middle upper cross bracing portion in the vertical direction is provided with a corner cutting mortise; the middle upper cross bracing structure is characterized in that two rectangular mortises which are not communicated are arranged on the outer upper side of the middle upper cross bracing structure in the vertical direction, the end faces of the rectangular mortises which are communicated are square, and the side length of the rectangular mortises is half of the side length of the square of the end face of the middle upper cross bracing structure, and is the same as the side length of the square of the end face of the middle upper cross bracing structure. The lower sides of the two sides of the middle lower transverse bracing structures in the transverse direction are respectively provided with a rectangular mortise which is through, the end surfaces of the rectangular mortise are rectangular, the width of the rectangular mortise is half of the side length of the square at the end surface of the middle lower transverse bracing structure, and the length of the rectangular mortise is the same as the side length of the square at the end surface of the middle lower transverse bracing structure; and the upper side of the middle lower transverse bracing structure is provided with an inclined right-angle mortise. The side lengths of the square side lengths of the end surfaces of the middle upper cross bracing sections are the same as the side lengths of the square side lengths of the end surfaces of the middle upper cross bracing sections; the upper side in the perpendicular direction in front upper bracing structure middle part is equipped with two rectangular body mortises that do not link up, rectangular body mortise terminal surface that link up is the square, and the length of side is half, the length of side length of middle upper bracing structure terminal surface square and is the same with middle upper bracing structure terminal surface square side length. The two middle legs, the middle lower transverse doorjambs and the front upper transverse doorjambs are respectively formed by connecting the rectangular body mortises through which the lower portions of the middle legs pass, the rectangular body mortises through which the two sides of the middle lower transverse doorjambs pass, the rectangular body mortises through which the two sides of the front upper transverse doorjambs pass, the rectangular body mortises through which the outer sides of the middle portions of the lower doorjambs in the vertical direction pass, the rectangular body mortises through which the upper portions of the lower doorjambs in the horizontal direction pass, and the rectangular body mortises through which the upper portions of the front legs pass through, together; further, the middle upper cross bracing members are joined to the middle upper cross bracing members through rectangular grooves formed through both sides of the middle upper cross bracing members and rectangular grooves formed through lower portions of the middle upper legs in the members C. Further, the member B is formed by joining the front end portion of the upper lateral bracing section and the lower end portion of the rear leg through tenon and mortise to the middle upper portion of the middle leg and the rear end portion of the lower lateral bracing section through tenon and mortise respectively to form the main body frame E.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, the concave rabbet is formed in the rear face of the seat panel; and the bottom surface of the seat panel is provided with two non-through dovetail mortises from back to front. A dovetail tenon is arranged above the threading belt; the two ends of the threading belt are provided with corner cutting tenons; the seat panel is spliced together with the penetrating two upper dovetail tenons through the non-through dovetail mortises at the bottom of the seat panel to form a component F. A convex tenon is arranged below the backrest plate, and the tenon shoulders on the two sides of the convex tenon are provided with chamfer bevel edges. Two pin mortises are arranged below the armrest plate. The member F is assembled with two non-through rectangular mortises at the middle portions of the middle upper cross bracing members and the front upper cross bracing members in the main body frame E through the two penetrating corner-cutting tenons at the two ends in the member E; further, the convex rabbets below the back rest boards are spliced together sequentially through the concave rabbets at the back of the seat panel, the middle upper cross doorjamb middle angle-cutting mortises in the main body frame E, and the middle lower cross doorjamb middle inclined right angle mortises in the main body frame E; and furthermore, the two handrail plates are spliced together through the two pin mortises below the handrail plates and the pin mortises at the top ends of the rear legs and the middle legs in the main body frame E respectively to finally form the solid wood seat integrated body G which is combined and disassembled by the tenon-and-mortise structure.

The solid wood seat combining the tenon-and-mortise structure with the disassembly function has the advantages that the style and the processing of the tenon-and-mortise structure are specifically unchanged, and the size and the dimension of 21 parts and the distance between the tenon-and-mortise structures can be adjusted and changed according to requirements. The front legs, the middle legs and the rear legs are parts in the vertical direction, and the positions of the cylindrical tenons at the lower parts of the front legs, the through rectangular mortises at the lower parts of the middle legs and the through tenon mortises at the lower parts of the rear legs are positioned on the same horizontal plane; the positions of the through tenon mortise on the upper middle part of the middle leg and the cylindrical tenon on the upper middle part of the rear leg are positioned on the same horizontal plane; the positions of the walking pin tenon at the top end of the middle leg and the walking pin tenon at the top end of the rear leg are positioned on the same horizontal plane. The rear transverse bracing structures, the middle upper transverse bracing structures, the middle lower transverse bracing structures, the front lower transverse bracing structures and the front upper transverse bracing structures are longitudinal parts, and the square tenons at the two sides of the rear transverse bracing structures, the rectangular mortises at the two sides of the middle upper transverse bracing structures, the rectangular mortises at the two sides of the middle lower transverse bracing structures and the rectangular mortises at the two sides of the front upper transverse bracing structures are positioned on the same longitudinal vertical plane; the corner cutting mortises in the middle parts of the middle upper transverse doorjambs and the inclined right-angle mortises on the upper sides of the middle parts of the middle lower transverse doorjambs are positioned on the same vertical plane in the longitudinal direction; the two rectangular mortises in the middle part of the middle upper cross bracing are positioned on the same vertical plane in the longitudinal direction.

In order to achieve the technical purpose, the technology adopts another technical scheme as follows:

an assembling method for a solid wood seat combining a tenon-and-mortise structure with disassembly comprises the following steps:

step 1, respectively placing cylindrical tenons at the lower parts of two front legs in rectangular mortise slots which are communicated in the vertical direction at the front parts of two lower side doorjambs; further, the square tenons at the two sides of the front lower horizontal doorjambs are respectively aligned with the rectangular mortise penetrating in the transverse direction at the front of the two lower horizontal doorjambs for insertion; finally, the two front legs are respectively rotated by 90 degrees to form a part A.

Step 2, respectively placing the cylindrical tenons on the upper middle parts of the two rear legs in rectangular mortise slots communicated in the vertical direction at the rear parts of the two upper jambs; further, the square tenons at both sides of the rear transverse doorjambs are respectively aligned with the rectangular mortise through in the transverse direction at the rear portions of the two upper doorjambs to be inserted; finally, the two rear legs will be rotated 90 ° to form part B, respectively.

Step 3, respectively aligning the rectangular mortises communicated with the lower parts of the two middle legs to the rectangular mortises communicated with the outer sides of the middle parts of the two lower side doorjambs in the part A in the vertical direction for splicing; further, rectangular body mortises communicating at both sides of the middle lower transverse bracing structure are respectively spliced with rectangular body mortises communicating at the upper part of the middle part of the lower transverse bracing structure in the part A in the transverse horizontal direction; and further, rectangular body mortises communicated with the two sides of the front upper cross bracing structure are respectively aligned with the rectangular body mortises communicated with the upper parts of the front legs in the part A to be spliced together to form a part C.

Step 4, respectively aligning the rectangular mortises communicated with the two sides of the middle upper cross bracing structure with the rectangular mortises communicated with the lower parts of the middle legs in the component C for splicing together; further, the front end portions of the two upper side doorjambs of the member B are inserted through the tenon joints, the lower portions of the two rear legs are inserted through the tenon joints, respectively, into the upper portions of the two middle legs of the member C, and the rear end portions of the two lower side doorjambs are inserted through the tenon joints, respectively, to form the main body frame D.

And 5, aligning two non-through dovetail mortises at the bottom of the seat panel to two dovetail joints above the through belts respectively and inserting the two dovetail mortises into a whole to form a component E.

Step 6, aligning two corner cutting tenons at two ends of the through belt in the member E with two non-through rectangular body mortises at the middle part of the middle upper cross bracing structure and two non-through rectangular body mortises at the middle part of the front upper cross bracing structure in the main body frame D respectively for splicing together; further, the convex rabbets below the backrest plate are sequentially spliced together through the concave rabbets at the back of the seat panel in the component E, the corner mortises at the middle part of the middle upper transverse doorjamb in the main body frame D and the inclined right-angle mortises at the middle part of the middle lower transverse doorjamb in the main body frame D; and further, aligning two pin mortises below the two armrest plates to the pin tenon joints at the top ends of the rear legs and the middle legs in the main body frame D respectively, and inserting the pin tenon joints at the top ends of the middle legs together to finally finish assembling the solid wood seat integrated body F which is combined with the disassembly and assembly by using the mortise and tenon joint structure.

The utility model has the beneficial effects that:

the detachable solid wood chair provided by the utility model has the advantages of simple and elegant shape, scientific and reasonable structure, simplicity in processing, capability of realizing modularized mass production and reduction in production cost.

The utility model adopts simple tenon-and-mortise structure connection, is convenient to disassemble and assemble, can realize plane transportation, reduces the transportation cost, saves the occupied space, reduces the enterprise inventory cost and is convenient for consumers to carry; if the parts are damaged, the parts are convenient to replace, the service life of the parts is ensured to be long, and a green design principle is embodied.

On the premise that the processing and manufacturing mode of the mortise and tenon structure is not changed, the requirements of consumers with different body shapes on the optimal use comfort can be met by changing the size of the furniture component and adjusting the position of the mortise and tenon structure on the component, and accordingly the solid wood seat is customized according to the ergonomics.

The utility model can be combined with the Internet technology to make animation demonstration, thereby not only facilitating the self assembly and disassembly of consumers and leading the consumers to have participation feeling, but also being more beneficial to the propagation of the thousand years of excellent traditional wood culture and superior traditional creation skills of the traditional mortise and tenon structure. And further helps promote the popularization and inheritance of the traditional wood culture in China, and establishes national confidence and cultural confidence.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a general schematic view of the utility model;

FIG. 2 is an exploded view of the present invention in relation to a structure and a package for facilitating planarization and integration after disassembly;

FIG. 3 is a detailed view of the present invention relating to parts;

FIG. 4 is a comparative illustration of the present invention after resizing;

FIG. 5 is a schematic view of the splicing sequence of the present invention;

wherein: 1. a seating panel; 2. a handrail plate; 3. a back board; 4. rear cross bracing structures; 5. upper bracing structures; 6. a rear leg; 7. middle upper bracing structures; 8. lower side doorjambs; 9. middle lower bracing structures; 10. a middle leg; 11. front lower cross bracing; 12. a front leg; 13. front upper bracing structures; 14. threading a belt; sixthly, representing the

steps

1, 2, 3, 4, 5 and 6 in the assembly method respectively.

Detailed Description

Specific embodiments of the technique are further described below with reference to fig. 1-5:

the utility model provides an use dismantled and assembled wood seat of mortise and tenon structure combination is 21 parts altogether for square not long and short wood flitch, 4 blocks of the same not big or small wood plank of thickness by 17 terminal surfaces, is formed by the mortise and tenon structure amalgamation of easily adopting machining's mode preparation completely. The 21 parts mainly include: a seat panel 1, two armrest panels 2, a back panel 3, a rear transverse bracing 4, two upper side bracing 5, two rear legs 6, an intermediate upper cross bracing 7, two lower side bracing 8, an intermediate lower transverse bracing 9, two intermediate legs 10, a front lower transverse bracing 11, two front legs 12, a front upper cross bracing 13, and two cross bracing 14. The mortise and tenon structures of the even-numbered components are symmetrically processed, wherein the five battens named as the transverse doorjambs have the same length, and the rear legs 6 and the middle legs 10 have the same length.

As shown in fig. 2, the solid wood seat using the tenon-and-mortise structure and the detachable solid wood seat provided by the embodiment is connected by using the simple tenon-and-mortise structure, so that the disassembly and the assembly are convenient, the planarization and the integrated packaging can be realized, and the transportation is convenient; if the parts are damaged, the replacement is convenient.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, the lower portion of the front leg 12 is provided with the cylindrical tenon (1000), the diameter of the cylindrical tenon (1000) is half of the side length of the square of the end face of the front leg 12, and the end face circle of the cylindrical tenon is tangent to two sides of the square end face of the front leg 12 and is arranged on the inner side where the two sides intersect in the longitudinal direction and the transverse direction; the inner side of the upper portion of the front leg 12 in the horizontal direction is provided with a through rectangular mortise (0002), and the end face of the rectangular mortise (0002) is rectangular, and the width of the rectangular mortise is half of the side length of the square of the end face of the lower side bracing structure 8, and the length of the rectangular mortise is the same as the side length of the square of the end face of the lower side bracing structure 8. The front portion of the lower side doorjamb 8 is respectively provided with through rectangular mortises (0003 and 0001) above in the horizontal direction and on the inner sides in the vertical direction, end faces of the rectangular mortises (0003 and 0001) are square, the side length of each rectangular mortise is half of the side length of the square on the end face of the lower side doorjamb 8, and two adjacent mortises and the transverse rectangular mortises (0003) are close to the front ends; the middle part of the lower side doorjamb 8 is respectively provided with through rectangular mortises (0004 and 0005) above the transverse horizontal direction and outside the vertical direction, the end surfaces of the rectangular mortises (0004 and 0005) are rectangular, the width of the rectangular mortises is half of the side length of the square on the end surface of the lower side doorjamb 8, the length of the rectangular mortises is the same as the side length of the square on the end surface of the lower side doorjamb 8, and the transverse rectangular mortises (0004) are close to the front end; and the middle of the rear end part of the lower side doorjamb 8 in the longitudinal horizontal direction is provided with a through tenon (6000), and the width of the through tenon (6000) is one third of the side length of the square of the end surface of the lower side doorjamb 8, the height of the through tenon is the same as the side length of the square of the end surface of the lower side doorjamb 8, and the length of the through tenon is two times of the side length of the square of the end part of the lower side doorjamb 8. Two sides of the front lower transverse bracing structure 11 are respectively provided with a square tenon (3000), the end surface of the square tenon (3000) is a half of the side length of the square of the end surface of the front lower transverse bracing structure 11, and the right upper corner right-angled side of the end surface of the square tenon (3000) is coincided with the right upper corner right-angled side of the square of the end surface of the front lower transverse bracing structure 11. The two lower side bracing portions 8 of the front legs 12 are joined to the front lower cross bracing portions 11 by through rectangular grooves (0003 and 0001) formed in the front portions of the front and lower side bracing portions 8 and the square grooves in the two sides of the front lower cross bracing portions 11(3000) to form members a.

According to the solid wood seat with the tenon-and-mortise structure combined with the detachable structure, the top end of the rear leg 6 is provided with the dowel pin tenon (7000); a cylindrical tenon (8000) is arranged at the middle upper part of the rear leg 6, the diameter of the cylindrical tenon (8000) is half of the side length of the square end face of the front leg 12, and the end face circle of the cylindrical tenon (8000) is tangent to two sides of the square end face of the front leg 12 and is intersected with the outer sides in the longitudinal direction and the transverse direction; and the middle of the lower part of the rear leg 6 in the longitudinal horizontal direction is provided with a through mortise (0006), the width of the end face of the through mortise (0006) is one third of the side length of the square of the end face of the rear leg 6, and the height of the through mortise is the same as the side length of the square of the end face of the rear leg 6. The front end portions of the upper side doorjambs 5 are provided with through tenon joints (9000) in the middle, the width of the through tenon joints (9000) is one third of the side length of the square at the end surfaces of the upper side doorjambs 5, the height of the through tenon joints is the same as the side length of the square at the end surfaces of the upper side doorjambs 5, and the length of the through tenon joints is two times the side length of the square at the end surfaces of the upper side doorjambs 5; the rear portions of the upper side doorjambs 5 are respectively provided with through rectangular mortises (0010 and 0008) above the horizontal direction and on the inner sides of the vertical direction, the end faces of the rectangular mortises (0010 and 0008) are square, the side length of each rectangular mortise is half of the side length of the square on the end face of the upper side doorjambs 5, and the two adjacent mortises and the transverse rectangular mortise (0010) are close to the rear end. The two sides of the rear transverse bracing structure 4 are respectively provided with a square tenon (0100), the end face of the square tenon (0100) is half of the side length of the square of the end face of the rear transverse bracing structure 4, and the left upper corner right-angle side of the end face of the square tenon (0100) is superposed with the left upper corner right-angle side of the end face of the rear transverse bracing structure 4. The rear legs 6, the upper side doorjambs 5, and the rear cross doorjambs 4 are joined together to form a member B by means of the cylindrical tenons (8000) at the middle portions of the rear legs 6 and the through rectangular grooves (0008 and 0010) at the rear portions of the upper side doorjambs 5 and the square tenons (0100) at both sides of the rear cross doorjambs 4.

According to the solid wood seat adopting the tenon-and-mortise structure and combined with the disassembly and assembly, the top end of the middle leg 10 is provided with the tenon (1100); a through tenon mortise (0009) is arranged in the middle of the middle upper part of the middle leg 10 in the longitudinal horizontal direction, the width of the end face of the through tenon mortise (0009) is one third of the side length of the square on the end face of the middle leg 10, and the height of the end face of the through tenon mortise is the same as the side length of the square on the end face of the middle leg 10; a through rectangular mortise (0012) is arranged on the outer side of the middle lower part of the middle leg 10 in the horizontal direction, the end face of the rectangular mortise (0012) is rectangular, the width of the rectangular mortise is half of the side length of a square on the end face of the middle leg 10, and the length of the rectangular mortise is the same as the side length of the square on the end face of the middle leg 10; the lower part of the middle leg 10 is longitudinally and horizontally provided with a through rectangular mortise (5000) on the inner side, the end face of the rectangular mortise (5000) is rectangular, the width of the rectangular mortise is half of the side length of the square on the end face of the middle leg 10, and the length of the rectangular mortise is the same as the side length of the square on the end face of the middle leg 10. The inner sides of the two sides of the middle upper cross bracing 7 in the vertical direction are respectively provided with a rectangular mortise (1200), the end surface of the rectangular mortise (1200) is rectangular, and the width of the rectangular mortise is half of the side length of the square on the end surface of the middle upper cross bracing 7, and the length of the square on the end surface of the middle upper cross bracing 7 is the same as the side length of the square on the end surface of the middle upper cross bracing 7; corner cutting mortises (0013) are arranged on the inner lower side of the middle upper cross bracing section 7 in the vertical direction; the middle upper cross bracing 7 is provided with two rectangular mortise (0014) which are not communicated at the upper side in the vertical direction of the middle part, the end face of the rectangular mortise (0014) which is communicated is square, and the side length is half of the side length of the square at the end face of the middle upper cross bracing 7 and the side length is the same as the side length of the square at the end face of the middle upper cross bracing 7. The lower sides of the two sides of the middle lower transverse bracing structures 9 in the transverse direction are respectively provided with a rectangular mortise (4000), the end surfaces of the rectangular mortises (4000) are rectangular, and the width of the rectangular mortises is half of the side length of the square at the end surface of the middle lower transverse bracing structures 9, and the length of the square at the end surface of the middle lower transverse bracing structures is the same as the side length of the square at the end surface of the middle lower transverse bracing structures 9; and the upper side of the middle lower transverse bracing structure 9 is provided with an inclined right-angle mortise (0015). The outer sides of the two sides of the front upper cross bracing 13 in the vertical direction are respectively provided with a rectangular mortise (2000) which is through, the end surface of the rectangular mortise (2000) is rectangular, and the width of the rectangular mortise is half of the side length of the square on the end surface of the middle upper cross bracing 7, and the length of the side length is the same as that of the square on the end surface of the middle upper cross bracing 7; two rectangular mortise (0016) which are not communicated are arranged at the vertically inner upper side of the middle part of the front upper cross bracing 13, the end face of the through rectangular mortise (0016) is square, and the side length is half of the side length of the square at the end face of the middle upper cross bracing 7 and is the same as the side length of the square at the end face of the middle upper cross bracing 7. The two middle legs 10, the middle lower transverse bracing 9 and the front upper transverse bracing 13 are respectively spliced together to form a member C through rectangular mortise (5000) penetrating through the lower portion of the middle leg 10, rectangular mortise (4000) penetrating through two sides of the middle lower transverse bracing 9 and rectangular mortise (2000) penetrating through two sides of the front upper transverse bracing 13, and rectangular mortise (0005) penetrating through the outer side in the middle vertical direction of the lower side bracing 8 in the member a, rectangular mortise (0004) penetrating through the upper portion in the middle horizontal direction of the lower side bracing 8 and rectangular mortise (0002) penetrating through the upper portion of the front leg 12; further, the middle upper cross bracing sections 7 are joined together by rectangular mortise slots (1200) formed through both sides of the middle upper cross bracing sections 7 and rectangular mortise slots (0012) formed through lower portions of the middle legs 10 in the member C to form a member D. Further, the member B is assembled to the main body frame E by the front end through tenons (9000) and the lower through tenons (0006) of the rear legs 6 and the upper and lower rear end through tenons (0009) of the intermediate legs 10 and the lower side doorjambs 8 and 6000, respectively, of the upper side cross doorjambs 5 and the lower leg 6.

According to the solid wood seat with the tenon-and-mortise structure combined and disassembled, a concave rabbet (0017) is formed in the rear face of the seat panel 1; the bottom surface of the seat panel 1 is provided with two blind dovetail mortises (0018) from back to front. A dovetail tenon (1800) is arranged above the threading belt 14; the two ends of the threading belt 14 are provided with corner cutting tenons (1400 and 1600); the seat panel 1 is spliced together with the two upper dovetail joints (1800) of the threading belt 14 through the non-through dovetail groove (0018) at the bottom of the seat panel 1 to form a component F. A convex tenon (17-13-1500) is arranged below the backrest plate 3, and tenon shoulders at two sides of the convex tenon (17-13-1500) are provided with chamfer bevel edges (0019). Two walking pin mortises (0007 and 0011) are arranged below the handrail plate 2. The member F is respectively spliced together with two non-through rectangular body mortises (0014) in the middle portion of the intermediate upper cross bracing 7 and two non-through rectangular body mortises (0016) in the middle portion of the front upper cross bracing 13 through the two end corner cutting tenons (1400 and 1600) of the strip 14 in the member E; further, the convex rabbets (17-13-1500) below the back rest panels 3 are sequentially spliced together through the concave rabbets (0017) at the rear of the seat panel 1, the corner grooves (0014) at the middle portions of the upper middle cross doorjambs 7 and the inclined right angle grooves (0015) at the middle portions of the lower middle cross doorjambs 9 of the main body frame E; and furthermore, the two handrail plates 2 pass through two pin mortises (0007 and 0011) below the handrail plates 2 and are respectively spliced with a pin tenon (0007) at the top end of the rear leg 6 and a pin tenon (0011) at the top end of the middle leg 10 in the main body frame E to finally form the solid wood seat integrated body G combining the tenon-and-mortise structure and being detachable.

The solid wood seat that uses mortise and tenon structure to combine dismantled and assembled that this embodiment provided, its mortise and tenon structure style with process for specific unchangeable, the size and size of 21 parts and the distance size between the mortise and tenon structure can adjust the change as required. As shown in fig. 4, the right side is a schematic view of the chair after being adjusted to a certain size, which is wider and has a backrest with a more inclined angle, so that the chair is taller and more comfortable for the fat consumers. Can meet the requirements of consumers with different body types on the optimal use comfort, thereby realizing the customized solid wood seat which accords with the human engineering. The front legs 12, the middle legs 10 and the rear legs 6 are parts in the vertical direction, and the positions of a cylindrical tenon (1000) at the lower parts of the front legs 12, a through rectangular mortise (5000) at the lower parts of the middle legs 10 and a through tenon mortise (0006) at the lower parts of the rear legs 6 are positioned on the same horizontal plane; the positions of the through tenon mortise (0009) on the upper middle part of the middle leg 10 and the cylindrical tenon (8000) on the upper middle part of the rear leg 6 are positioned on the same horizontal plane; the positions of the walking pin tenon (1100) at the top end of the middle leg 10 and the walking pin tenon (7000) at the top end of the rear leg 6 are on the same horizontal plane. Wherein the rear transverse bracing structures 4, the intermediate upper transverse bracing structures 7, the intermediate lower transverse bracing structures 9, the front lower transverse bracing structures 11 and the front upper transverse bracing structures 13 are longitudinal parts, and the square tenons (0100) on two sides of the rear transverse bracing structures 4, the rectangular mortises (1200) on two sides of the intermediate upper transverse bracing structures 7, the rectangular mortises (4000) on two sides of the intermediate lower transverse bracing structures 9, the square tenons (3000) on two sides of the front lower transverse bracing structures 11 and the rectangular mortises (2000) on two sides of the front upper transverse bracing structures 13 are positioned on the same longitudinal vertical plane; the corner cut mortises (0014) in the middle of the middle upper transverse bracing structures 7 and the inclined right-angle mortises (0015) on the upper sides in the middle of the middle lower transverse bracing structures 9 are positioned on the same vertical plane in the longitudinal direction; the two rectangular mortises (0014) in the middle of the middle upper cross bracing 7 and the two rectangular mortises (0016) in the middle of the front upper cross bracing 13 are in the same vertical plane in the longitudinal direction.

As shown in fig. 5, the embodiment further provides an assembling method of a solid wood seat using a mortise and tenon structure to combine with a detachable solid wood seat, including the following steps:

step 1, respectively placing cylindrical tenons (1000) at the lower parts of two front legs 12 in rectangular mortise (0001) penetrating in the vertical direction in front of two lower bracing structures 8; further, the square tenons (3000) at both sides of the front lower cross bracing structures 11 are respectively inserted into rectangular mortise slots (0003) penetrating in the transverse direction at the front sides of the two lower cross bracing structures 8; finally, the two front legs 12 are rotated by 90 ° to form the component a.

Step 2, respectively placing the cylindrical tenons (8000) at the middle parts of the two rear legs 6 on the upper side doorjambs 5 in rectangular mortise (0008) penetrating in the vertical direction at the rear parts of the two upper side doorjambs 5; further, square tenons (0100) at both sides of the rear transverse bracing structure 4 are respectively inserted into rectangular mortise (0010) penetrating in the transverse direction at the rear portion of the two upper side bracing structures 5; finally, the two rear legs 6 will be rotated by 90 ° to form the component B.

Step 3, respectively aligning the rectangular mortises (5000) penetrating through the lower parts of the two middle legs 10 to rectangular mortises (0005) penetrating through the outer sides of the middle parts of the two lower side doorjambs 8 in the member a in the vertical direction for plugging; further, rectangular body mortises (4000) formed through both sides of the middle lower cross bracing structures 9 are respectively inserted into rectangular body mortises (0004) formed through the middle of the lower cross bracing structures 8 in the members a in the horizontal direction and upward; further, rectangular grooves (2000) extending through both sides of the front upper cross bracing members 13 are aligned with rectangular grooves (0002) extending through the upper portions of the front legs 12 of the members a to form members C.

Step 4, respectively aligning the rectangular body mortises (1200) which are through at the two sides of the middle upper cross bracing sections 7 with the rectangular body mortises (0012) which are through at the middle lower parts of the middle legs 10 in the components C for splicing together; further, the front end portions of the two upper side doorstructures 5 and the lower end portions of the two rear legs 6 of the member B are simultaneously inserted into the through tenons 9000 and the through tenons 0006 respectively in alignment with the upper end portions of the two middle legs 10 and the rear end portions of the two lower side doorstructures 8 and the rear end portions of the two middle legs 10 and the rear end portions of the two lower side doorstructures 8, respectively, to form the main body frame D.

And 5, aligning two non-through dovetail grooves (0018) at the bottom of the seat panel 1 with dovetail joints (1800) above two strips 14 respectively and inserting the dovetail grooves together to form a component E.

Step 6, aligning two corner-cutting tenons (1400 and 1600) at two ends of the threading belt 14 in the member E with two non-through rectangular body mortises (0014) at the middle part of the middle upper cross bracing section 7 and two non-through rectangular body mortises (0016) at the middle part of the front upper cross bracing section 13 in the main body frame D respectively for splicing together; further, convex rabbets (17-13-1500) below the backrest panel 3 are sequentially inserted into the concave rabbets (0017) at the back of the seat panel 1 in the part E, corner grooves (0013) at the middle portions of the middle upper cross doorjambs 7 in the main body frame D, and inclined right-angle rabbets (0015) at the middle portions of the middle lower cross doorjambs 9 in the main body frame D; and further, aligning two pin mortises (0007 and 0011) below the two handrail plates 2 to a pin tenon (7000) at the top end of the rear leg 6 and a pin tenon (1100) at the top end of the middle leg 10 in the main body frame D respectively, and inserting the pin mortises into the pin tenon (7000) to finally finish assembling the solid wood seat integrated body F combining the tenon-and-mortise structure and the disassembly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the above-mentioned embodiments, or some technical features may be substituted equally. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid wood seat combining a tenon-and-mortise structure with disassembly is characterized in that the solid wood seat is formed by joining 17 solid wood battens with the same square end surfaces and 4 solid wood boards with the same thickness by a tenon-and-mortise structure which is easy to manufacture completely by adopting a machining mode, wherein the 17 solid wood battens and the 4 solid wood boards are 21 parts; the 21 parts mainly include: a seat panel, two armrest panels, a back panel, a rear transverse bracing structure, two upper side bracing structures, two rear legs, a middle upper bracing structure, two lower side bracing structures, a middle lower bracing structure, two middle lower bracing structures, a front lower bracing structure, two front legs, a front upper bracing structure, and two threading belts; the mortise and tenon structures of the parts with the same number and the same size are processed in a bilateral symmetry mode; the five battens named as the cross bracing have the same length, and the rear legs and the middle legs have the same length;

the lower part of the front leg is provided with a cylindrical tenon, the diameter of the cylindrical tenon is half of the side length of the square of the end surface of the front leg, and the end surface circle of the cylindrical tenon is tangent to the two sides of the square end surface of the front leg and is positioned on the inner side where the two sides are intersected with the longitudinal direction and the transverse direction; the inner sides of the upper parts of the front legs in the transverse horizontal direction are provided with through rectangular mortises, the end surfaces of the rectangular mortises are rectangular, the width of the rectangular mortises is half of the side length of a square of the end surfaces of the lower side doorjambs, and the length of the rectangular mortises is the same as the side length of the square of the end surfaces of the lower side doorjambs; the front parts of the lower side doorjambs are respectively provided with through rectangular mortises above the transverse horizontal direction and on the inner sides in the vertical direction, the end faces of the rectangular mortises are square, the side length of each rectangular mortises is half of the side length of the square of the end faces of the lower side doorjambs, and the two adjacent mortises and the transverse rectangular mortises are close to the front ends; the middle part of the lower side doorjamb is respectively provided with a through rectangular mortise above the transverse horizontal direction and outside the vertical direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square of the end face of the lower side doorjamb, the length of the rectangular mortise is the same as the side length of the square of the end face of the lower side doorjamb, and the transverse rectangular mortise is close to the front end; the middle of the longitudinal horizontal direction of the rear end parts of the lower side doorjambs is provided with a through tenon, the width of the through tenon is one third of the side length of the square of the end surfaces of the lower side doorjambs, the height of the through tenon is the same as the side length of the square of the end surfaces of the lower side doorjambs, and the length of the through tenon is two times of the side length of the square of the end parts of the lower side doorjambs; the two sides of the front lower transverse doorjambs are respectively provided with a square tenon, the end surfaces of the square tenons are squares, the side length of each square tenon is half of that of the square at the end surfaces of the front lower transverse doorjambs, and the right-upper corner right-angled edges of the end surfaces of the square tenons are superposed with the right-upper corner right-angled edges of the square at the end surfaces of the front lower transverse doorjambs; the front leg two lower side doorjambs are joined together with the front lower transverse doorjambs by means of through rectangular tenons at the front portions of the cylindrical tenons and the lower side doorjambs to form a section a;

the top end of the rear leg is provided with a tenon head of a walking pin; the middle upper part of the rear leg is provided with a cylindrical tenon, the diameter of the cylindrical tenon is half of the side length of the square end surface of the front leg, and the end surface circle of the cylindrical tenon is tangent to the two sides of the square end surface of the front leg and intersects with the outer sides in the longitudinal and transverse directions; the middle of the lower part of the rear leg in the longitudinal horizontal direction is provided with a through tenon mortise, the width of the end face of the through tenon mortise is one third of the side length of the square of the end face of the rear leg, and the height of the end face of the through tenon is the same as the side length of the square of the end face of the rear leg; the front end parts of the upper side doorjambs are provided with through tenon joints in the middle, the width of the through tenon joints is one third of the side length of the square of the end surfaces of the upper side doorjambs, the height of the through tenon joints is the same as the side length of the square of the end surfaces of the upper side doorjambs, and the length of the through tenon joints is two times of the side length of the square of the end surfaces of the upper side doorjambs; the rear parts of the upper side doorjambs are respectively provided with through rectangular mortises above the transverse horizontal direction and on the inner sides in the vertical direction, the end faces of the rectangular mortises are square, the side length of each rectangular mortises is half of the side length of the square of the end faces of the upper side doorjambs, and the two mortises are adjacent to each other and the transverse rectangular mortises are close to the rear ends; two sides of the rear transverse doorjamb are respectively provided with a square tenon, the end face of the square tenon is a square, the side length of the square is half of that of the square of the end face of the rear transverse doorjamb, and the right-angle side at the left upper corner of the end face of the square tenon is superposed with the right-angle side at the left upper corner of the square of the end face of the rear transverse doorjamb; the rear leg two, upper side doorjambs are joined together with the rear transverse doorjambs by means of the cylindrical tenons of the middle portions of the rear legs, the rectangular mortise formed at the rear portions of the upper side doorjambs and the square tenons of the two sides of the rear transverse doorjambs;

the top end of the middle leg is provided with a tenon head of a trotting horse pin; the middle part of the middle upper part of the middle leg in the longitudinal horizontal direction is provided with a through tenon mortise, the width of the end face of the through tenon mortise is one third of the side length of the square of the end face of the middle leg, and the height of the end face of the through tenon mortise is the same as the side length of the square of the end face of the middle leg; a through rectangular mortise is arranged on the outer side of the middle lower part of the middle leg in the transverse horizontal direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square on the end face of the middle leg, and the length of the rectangular mortise is the same as the side length of the square on the end face of the middle leg; a through rectangular mortise is arranged on the inner side of the lower part of the middle leg in the longitudinal horizontal direction, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square on the end face of the middle leg, and the length of the rectangular mortise is the same as the side length of the square on the end face of the middle leg; the inner sides of the two sides of the middle upper cross bracing structure in the vertical direction are respectively provided with a rectangular mortise which is communicated with each other, the end face of the rectangular mortise is rectangular, the width of the rectangular mortise is half of the side length of the square of the end face of the middle upper cross bracing structure, and the length of the rectangular mortise is the same as the side length of the square of the end face of the middle upper cross bracing structure; the inner lower side of the middle upper cross bracing portion in the vertical direction is provided with a corner cutting mortise; the middle upper cross bracing sections are provided with two rectangular mortises which are not communicated at the outer upper side in the vertical direction of the middle upper cross bracing section, the end surfaces of the rectangular mortises which are communicated are square, and the side length is half of the side length of the square at the end surface of the middle upper cross bracing section and is the same as the side length of the square at the end surface of the middle upper cross bracing section; the lower sides of the two sides of the middle lower transverse bracing structures in the transverse direction are respectively provided with a rectangular mortise which is through, the end surfaces of the rectangular mortise are rectangular, the width of the rectangular mortise is half of the side length of the square at the end surface of the middle lower transverse bracing structure, and the length of the rectangular mortise is the same as the side length of the square at the end surface of the middle lower transverse bracing structure; the upper side of the middle part of the middle lower horizontal bracing structure is provided with an inclined right-angle mortise; the outer sides of the two sides of the front upper transverse bracing structures in the vertical direction are respectively provided with a through rectangular mortise end face, and the end faces of the rectangular mortise are rectangular, half of the side length of the square of the end face of the middle upper transverse bracing structure and the length of the side length of the square of the end face of the middle upper transverse bracing structure are the same as the side length of the square of the end face of the middle upper transverse bracing structure; the inner upper side of the middle portion of the front upper transverse bracing structure in the vertical direction is provided with two rectangular mortise which are not communicated, end faces of the communicated rectangular mortise are square, and the side length of the square side length of the end face of the middle upper transverse bracing structure is half of that of the square side length of the end face of the middle upper transverse bracing structure and is the same as that of the square side length of the end face of the middle upper transverse bracing structure; the two middle legs, the middle lower transverse doorjambs and the upper front transverse doorjambs are respectively spliced together with the rectangular body mortises through which the lower portions of the middle legs are communicated, the rectangular body mortises through which the two sides of the middle lower transverse doorjambs are communicated, the rectangular body mortises through which the two sides of the upper front transverse doorjambs are communicated, and the rectangular body mortises through which the middle portions of the lower side doorjambs are communicated in the vertical direction, the rectangular body mortises through which the upper portions of the lower side doorjambs are communicated in the horizontal direction, and the rectangular body mortises through which the upper portions of the front legs are communicated; further, the middle upper cross bracing members are joined together with the rectangular grooves formed through the two sides of the middle upper cross bracing members, and the rectangular grooves formed through the middle lower portions of the middle legs in the members C; further, the member B is assembled with the upper side cross doorjamb front end penetrating tenon and the rear leg lower penetrating tenon and mortise of the member B and the middle leg middle upper inclined portion penetrating tenon and the lower side doorjamb rear end penetrating tenon and tenon of the member D to form a main body frame E;

a concave rabbet is arranged at the back of the seat panel; the bottom surface of the seat panel is provided with two non-through dovetail mortises from back to front; a dovetail tenon is arranged above the threading belt; the two ends of the threading belt are provided with corner cutting tenons; the seat panel is spliced with the two upper dovetail tenon heads of the threading belt through the non-through dovetail mortise at the bottom of the seat panel to form a component F; a convex tenon is arranged below the backrest plate, and the tenon shoulders on the two sides of the convex tenon are provided with chamfer bevel edges; two walking pin mortises are arranged below the armrest plate; the member F is assembled together with two rectangular grooves not communicating with each other in the middle portions of the upper and lower middle cross bracing members and two rectangular grooves not communicating with each other in the middle portions of the upper and lower middle cross bracing members through the two penetrating corner mortises in the main body frame E; further, the convex rabbets below the back rest boards are spliced together sequentially through the concave rabbets at the back of the seat panel, the middle upper cross doorjamb middle angle-cutting mortises in the main body frame E, and the middle lower cross doorjamb middle inclined right angle mortises in the main body frame E; and furthermore, the two handrail plates are spliced together with the rear leg top end pin tenon and the middle leg top end pin tenon in the main body frame E respectively through the two pin mortises below the handrail plates, and finally the solid wood seat integrated body G which is combined and disassembled by the tenon-and-mortise structure is formed.

2. The solid wood seat combining the tenon-and-mortise structures with the disassembly and assembly functions as claimed in claim 1, wherein the style and the processing of the tenon-and-mortise structures are unchanged, and the size and the dimension of the 21 parts and the distance between the tenon-and-mortise structures can be adjusted and changed as required; the front legs, the middle legs and the rear legs are parts in the vertical direction, and the positions of the cylindrical tenons at the lower parts of the front legs, the through rectangular mortises at the lower parts of the middle legs and the through tenon mortises at the lower parts of the rear legs are positioned on the same horizontal plane; the positions of the through tenon mortise on the upper middle part of the middle leg and the cylindrical tenon on the upper middle part of the rear leg are positioned on the same horizontal plane; the positions of the walking pin tenon at the top end of the middle leg and the walking pin tenon at the top end of the rear leg are positioned on the same horizontal plane; the rear transverse bracing structures, the middle upper transverse bracing structures, the middle lower transverse bracing structures, the front lower transverse bracing structures and the front upper transverse bracing structures are longitudinal parts, and the square tenons at the two sides of the rear transverse bracing structures, the rectangular mortises at the two sides of the middle upper transverse bracing structures, the rectangular mortises at the two sides of the middle lower transverse bracing structures and the rectangular mortises at the two sides of the front upper transverse bracing structures are positioned on the same longitudinal vertical plane; the corner cutting mortises in the middle parts of the middle upper transverse doorjambs and the inclined right-angle mortises on the upper sides of the middle parts of the middle lower transverse doorjambs are positioned on the same vertical plane in the longitudinal direction; the two rectangular mortises in the middle part of the middle upper cross bracing are positioned on the same vertical plane in the longitudinal direction.