CN115055614A - Seat frame coil spring assembling method - Google Patents
Seat frame coil spring assembling method Download PDFInfo
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- CN115055614A CN115055614A CN202210539386.8A CN202210539386A CN115055614A CN 115055614 A CN115055614 A CN 115055614A CN 202210539386 A CN202210539386 A CN 202210539386A CN 115055614 A CN115055614 A CN 115055614A
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- 230000008569 process Effects 0.000 description 25
- 241000270295 Serpentes Species 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 7
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Abstract
The invention discloses a seat frame coil spring assembling method, which comprises the following steps: s1: prefabricating a seat frame; connecting hooks are respectively pre-installed on the front side and the rear side of the seat surface of the seat frame; s2: the serpentine spring is an arch spring; one end of the arch spring is connected to the connecting hook at one side of the seat frame as a pre-connection end, and the other end of the arch spring correspondingly forms a free end and naturally falls in the seat frame; s3: prefabricating an auxiliary connecting device; the auxiliary connecting device comprises a tilting rod, a pull rod and a tension spring; s4: stretching the arch spring by using the auxiliary connecting device; the tilting rod is held by hand and the pull rod drag hook is hooked on the arch spring; the lower part of the warped rod is propped against the seat frame and the warped rod is pulled to generate lever motion so as to stretch the arch spring; the pull rod rotates downwards relative to the tilting rod; s5: pulling the tilting rod to tilt the free end of the arch spring and cross over the connecting hook; the warped rod is loosened, and the free end of the arch spring is hooked on the connecting hook; s6: the draw hook of the draw rod is separated from the arch spring, and the draw rod is rotated upwards to reset; and S7, repeating the steps 1-6, and assembling the arch springs on the seat frame side by side in sequence.
Description
Technical Field
The invention relates to the field of seats, in particular to a seat frame coil spring assembling method.
Background
The elastic seat frame of the existing sofa comprises a seat frame and a plurality of coiled springs which are arranged in the seat frame and distributed at intervals, so that the seat surface of the sofa can be elastically supported when the sofa is used. The assembly is connected to a frame body of the sofa seat frame and comprises a plurality of parallel-arranged snake springs, reinforcing strips and flexible connecting strips, the reinforcing strips are arranged in parallel with the snake springs, the number of the reinforcing strips is two, the two reinforcing strips are respectively located at the snake springs at the outermost side, two ends of each connecting strip are respectively and fixedly connected to the corresponding reinforcing strips, the number of the connecting strips is a plurality of, the connecting strips are uniformly distributed along the length direction of the reinforcing strips, the reinforcing strips are fixedly connected to the corresponding snake springs, and the connecting strips are provided with connecting mechanisms which enable all the snake springs to be connected with the connecting strips.
In addition, most sofa manufacturers assemble the serpentine spring and the seat frame manually at present; the assembly process is as follows: an operator firstly connects one end of the serpentine spring to one side of the seat frame, then holds the other end of the serpentine spring with hands, and then forcibly stretches and strains the serpentine spring, so that the other end of the serpentine spring is stretched by a sufficient length to be connected to the other side of the seat frame, and the serpentine spring is ensured to be tensioned on the seat frame; this results in the operator needing to constantly apply pre-tightening force to each serpentine spring during the assembly process, which makes the long-term operation very physically demanding; resulting in a great reduction in installation efficiency.
As an improvement, a crow bar is used to crow the snake spring on the seat frame, but several problems are found in the operation: firstly, the crowbar has to be inserted into a certain position of the serpentine spring when being pried, namely the crowbar is easy to interfere with the serpentine spring, so that the operation is not smooth; secondly, when the serpentine spring is hung in place, the crowbar is still applied with hanging force due to the reverse deformation acting force of the serpentine spring, so that the crowbar is blocked when being separated from the serpentine spring; thirdly, the snake spring is deformed due to the overlarge rotation angle of the crowbar, so that the subsequent use is influenced; particularly, through the first point and the second point, although the labor is saved for operators, most of the time is spent on inserting and locating the crowbar and the serpentine spring, and the phenomenon that the crowbar is separated from the crowbar after being hung is overcome; the time is rather slow compared to the way the spring is pulled by the human hand and still not satisfactory.
In view of the above problems, it is urgently needed to design a labor-saving and efficiency-improving method for assembling a seat frame serpentine spring, which can maximally save labor when connecting operating personnel and improve installation efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a seat frame coil spring assembling method; the snake spring chooses for use to encircle the spring, connects on the seat frame through the shape that will encircle the spring initial intermediate position and go up the arch, recycles supplementary connecting device and combines to encircle the tensile bending process of spring radian change that self takes place for can be fast with the free end hook joint that encircles the spring on the couple of seat frame, realize encircleing the rapid Assembly of spring, and the assembling process is light and handy laborsaving, improves the installation effectiveness greatly.
The technical scheme of the invention is realized as follows:
a seat frame coil spring assembling method comprises the following steps:
s1: prefabricating a seat frame; connecting hooks are respectively pre-installed on the front side and the rear side of the seat surface of the seat frame; the connecting hooks are semi-open, and the opening directions of the connecting hooks on the two sides of the seat frame are opposite;
s2: the spiral spring is an arch spring; one end of the arch spring is connected to the connecting hook at one side of the seat frame as a pre-connection end, and the other end of the arch spring correspondingly forms a free end and is positioned above the space surrounded by the seat frame; and the arch spring is in an upward-arching shape at the middle position along the length direction;
s3: prefabricating an auxiliary connecting device; the auxiliary connecting device comprises a tilting rod, a pull rod and a tension spring arranged between the tilting rod and the pull rod; the tilting rod is longitudinally arranged, the rear end of the pull rod is rotatably connected to the tilting rod, and the pull rod extends forwards relative to the tilting rod; the front end of the pull rod is provided with a drag hook which can be hooked with the arch spring;
s4: stretching the arch spring by using the auxiliary connecting device; the tilting rod is held by hand and the draw hook at the front end of the pull rod is hooked at a position close to the free end of the arch spring; the lower part of the raising rod is propped against the seat frame and the raising rod is pulled to move in a lever mode relative to the seat frame in the direction away from the seat frame; the warped rod drives the pull rod to move, so that the arch spring is stretched along the length direction of the seat frame; and the pull rod rotates downwards relative to the tilting rod under the action of the elasticity of the arch spring;
s5: the tilting rod is pulled backwards to enable the arch spring to be stretched to the extent that the free end of the arch spring tilts along with the change of the radian of the free end of the arch spring and spans the connecting hook; the warped rod is loosened, and the free end of the arch spring is hooked on the connecting hook under the action of the reset elasticity of the arch spring;
s6: the tilting rod is rotated forwards in the reverse direction to enable the drag hook at the front end of the pull rod to be separated from the arch spring, and the pull rod is rotated upwards to reset by the reset elasticity provided by the tension spring;
and S7, repeating the steps S1-S6, and assembling the arch springs on the seat frame side by side in sequence.
Preferably, the seat frame is connected with seat cloth matched with the contour size of the seat frame; in step S2, the free end of the arch spring naturally hangs down on the seat cloth. The seat cloth is a structure of the seat frame; the seat cloth is ingeniously utilized to support the free end of the arch spring, so that the free end of the arch spring is prevented from sinking into the seat frame; make many arch springs connect on the seat frame side by side in advance, then in proper order to every arch spring carry out tensile assembly, make the connection more convenient.
Preferably, in steps S4 and S5, the arch height of the arch spring is gradually reduced as the arch spring is subjected to tensile deformation; and the free end of the arch spring moves upwards to stride over the connecting hook at the same time when the free end of the arch spring moves horizontally towards the connecting hook. Because the arch spring is initially connected to the seat frame in a bent state; the change of radian of the arch spring in the backward stretching deformation process is utilized, so that the free end of the arch spring can naturally tilt and stride over the connecting hook; the free end of the arch spring can automatically stride over the connecting hook without the need of an operator to carry out positioning connection; later, operating personnel only need loosen the stick-up pole and can make the free end of encircleing the spring hang on connecting hook automatically, and the design is very ingenious for in the assembling process, operating personnel only need "draw one and put" to the stick-up pole, can realize encircleing the assembly of spring.
Preferably, the arch spring is retained in a shape of being upwardly arched at an intermediate position in the longitudinal direction after the arch spring is assembled with the seat frame. After the arch spring is assembled, the middle position of the arch spring is slightly arched, and when a user sits on the sofa, the gravity of the user downwards acts on the arch spring to enable the middle position of the arch spring to be bent downwards and deformed; so that the arch spring can just approach to a horizontal state; so that the user feels comfortable when sitting on the sofa.
Preferably, the pull rod is arranged in the middle of the tilting rod; and the warped rod is provided with a gripping part positioned above the pull rod and a prying part positioned below the pull rod. When the operation is performed, a user holds the grasping part by hand, so that the pull rod can be conveniently hooked with the arch spring; the prying part is very convenient to abut against the seat frame; the position arrangement is reasonable, and each plays its own role.
Preferably, the tension spring is obliquely arranged, one end of the tension spring is connected to the pull rod, and the other end of the tension spring is connected to the position, above the pull rod, of the tilting rod; the tension spring is correspondingly elastically deformed in response to the downward rotation action of the pull rod so as to provide the upward rotation reset elastic force for the pull rod. The pull rod and the warping rod are arranged in a rotating mode, and a tension spring is arranged between the pull rod and the warping rod; the pull rod can perform self-adaptive rotation adjustment relative to the tilting rod in the process of stretching the arch spring, so that the pull rod can be always positioned at a position of the arch spring with an effective stretching effect; the operation is more labor-saving; and when one arch spring is assembled, the tension spring can act on the pull rod to reset so as to act on the next arch spring quickly.
Preferably, the pull rod tends to be horizontal in an unstressed natural state. So that initially, it is easy to hook the drawbar forward on the dome spring.
Preferably, in S3, the tie bar is twisted in the left-right direction using a metal plate to form a connecting plate and a tie plate, the connecting plate is in a side-standing state, and the tie plate is in a horizontal state; the front end of the pulling plate is bent downwards to form the pulling hook. The metal plate is adopted for twisting and forming, so that the structural strength is high, and the processing is rapid; the connecting plate is in a side-standing state so as to be convenient for rotating connection; the pulling plate is in a horizontal state so as to conveniently arrange a pulling hook; the design is ingenious.
Preferably, the tilting rod is provided with a rotating support plate extending forwards; the connecting plate is attached to the left and right of the rotating support plate and is rotatably connected with the rotating support plate.
Preferably, the connecting plate is connected with the rotating support plate through a screw and a nut; and the connecting plate can rotate up and down by taking the screw as a rotating shaft. The connecting plate is connected with the rotating supporting plate through a screw and a nut, so that the connection is stable; the screw can further realize the rotation fit between the connecting plate and the rotating support plate; the structural design is simple and ingenious.
Preferably, the nut comprises an inner nut and an outer nut; the inner nut and the outer nut are sequentially connected at the penetrating end of the screw rod, and a gasket is arranged between the inner nut and the outer nut. Two nuts are arranged, so that the nuts are prevented from loosening in the rotation process of the pull rod.
Preferably, the warping rod is a metal round rod, and the rotating support plate is welded and fixed with the warping rod. And a metal round rod is adopted, so that the warping rod is high in structural strength.
The design starting point, concept and beneficial effect of the invention adopting the technical scheme are as follows:
according to the seat frame coil spring assembling method, the conventional coil springs are generally divided into arch springs and flat springs, the arch springs are selected in the assembling process, the arch springs have arch heights, and the arch heights of the arch springs can be changed in the stretching process. Then when the arch spring is initially connected to the seat frame, the arch spring is in an upward-arching shape at the middle position along the length direction; then, the auxiliary connecting device is combined with radian changes generated in the arch spring stretching and bending process, so that in the assembling process, the upper end of the tilting rod is held by a hand and inclines forwards, the draw hook at the front end of the draw rod is hooked at a position close to the free end of the arch spring, and then the lower end of the tilting rod naturally props against the seat frame and is pulled back to stretch the arch spring; and because the initial state of the arch spring is in an upward-arching shape at the middle position along the length direction, the arch height at the middle position of the arch spring is gradually reduced (namely the arch height is reduced) in the backward stretching process of the arch spring; the free end of the arch spring naturally tilts backwards and upwards along with the change of the radian of the arch spring, so that the free end of the arch spring can naturally stride across the connecting hook backwards without the need of an operator to perform positioning connection; then the warped rod is loosened, the free end of the arch spring can be firmly hooked on the connecting hook under the action of the reset elastic force of the arch spring, and the actions are completed in one go, so that in the assembling process, an operator only needs to carry out 'one pull and one release' on the warped rod, and the assembling of the arch spring can be realized.
And 2, after the auxiliary connecting device completes the connection of one arch spring, the draw hook at the front end of the pull rod is separated from the arch spring, and the tension spring can act on the pull rod to quickly rotate and reset, so that the pull rod is convenient to hook for the next time. Therefore, the tilting rod is utilized to carry out lever motion around the seat frame, so that the arch spring can be easily tensioned; the operation is easy and labor-saving, and the installation efficiency of the arch spring is greatly improved.
3, seat cloth matched with the contour size of the seat frame is connected to the seat frame; the seat cloth is used for playing a role in decorating and shielding the bottom of the seat frame; when the arch spring is initially connected to the seat frame, the free end of the arch spring naturally falls on the seat cloth under the action of gravity; the seat cloth is a structure of the seat frame; the seat cloth is ingeniously utilized to support the free end of the arch spring, so that the free end of the arch spring is prevented from sinking into the seat frame; make many arch springs connect on the seat frame side by side in advance, then assemble every arch spring in proper order, make to connect more conveniently.
4, choose to use the arch spring can also make: after the arch spring and the seat frame are assembled, the arch height is reduced; when the arch spring is used to bear the weight of a user at the later stage, the arch spring can tend to be flattened, so that the seat surface cannot collapse; so that the user feels comfortable when sitting on the sofa.
5, when the arch spring is initially connected to the seat frame, the middle of the arch height is in an upper arch shape; namely, the arch spring can be tilted to a certain height, so that when the tilting rod rotates towards the seat frame, the pulling hook of the pulling rod is easily hooked to the corresponding position of the arch spring, the pulling hook is convenient to connect and locate quickly, and the arch bending of the arch spring plays a role in catering to the situation; meanwhile, the pull rod is provided with a certain length, so that the pull rod is convenient to extend forwards; in this way, the tilting rod can be pulled and hooked to the arch spring without rotating for a large angle; in the whole operation process, the tilting rod body does not need to be inserted into the arch spring; in the lever prying process, the interference with the serpentine spring is avoided; moreover, when the hook is hung in place, the hook can be conveniently separated from the arch spring; the whole hanging and releasing process only needs about 1S, so that the labor is saved, and the efficiency is improved.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention in which an auxiliary connecting device is used to stretch a dome spring;
FIG. 2 is a schematic perspective view of the hook of the drag link of the present invention initially hooked on the arch spring;
FIG. 3 is a side view of the drag hook of the drag link preliminarily hooked on the arch spring in the embodiment of the present invention;
FIG. 4 is a schematic perspective view of an embodiment of the present invention illustrating a seesaw bar pulled to stretch a dome spring;
FIG. 5 is a schematic perspective view of the present invention illustrating the free end of the arch spring naturally spanning the hook;
FIG. 6 is a perspective view of the arch spring mounted on the seat frame in an embodiment of the present invention;
FIG. 7 is a perspective view of an auxiliary connecting device according to an embodiment of the present invention;
FIG. 8 is a perspective view of an alternative angle of an auxiliary connecting device according to an embodiment of the present invention;
FIG. 9 is a schematic perspective view of a drawbar in an embodiment of the present invention;
FIG. 10 is a flowchart illustrating assembly steps in an embodiment of the present invention.
The figures are numbered: a seat frame A; an auxiliary connecting device B; a warped rod 1; a grip portion 1 a; a prying portion 1 b; a pull rod 2; a tension spring 3; a connecting plate 2 a; a pull rod 2 b; rotating the support plate 4; a screw 5; an inner nut 6; an outer nut 7; a gasket 8; a draw hook 9; a first bump 10; a second bump 11; a through hole 12; a connecting hook 13; a dome spring 14; a pre-joint end 14 a; free end 14 b.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiment of the invention is as follows:
as shown in fig. 1-10, the present invention provides a seat frame coil spring assembly method; the elastic seat frame of the existing sofa comprises a seat frame A and a plurality of coiled springs which are arranged in the seat frame A and distributed at intervals, wherein the coiled springs are detachably connected with the seat frame A; in the prior art, the serpentine spring is tensioned and assembled manually, so that the operation is labor-intensive and the efficiency is low; the assembling method aims to make the assembling steps of the serpentine spring and the seat frame A easier and more labor-saving and improve the assembling efficiency.
The assembling method comprises the following steps:
s1: as shown in fig. 1-6, seat frame a is prefabricated; connecting hooks 13 are respectively pre-installed on the front side and the rear side of the seat surface of the seat frame A; the connecting hooks 13 are arranged on the seat frame A in parallel; the connecting hooks 13 are semi-open, and the opening directions of the connecting hooks 13 on both sides of the seat frame A are opposite. The seat frame A is also connected with a seat cloth (not shown) matched with the contour size of the seat frame A, the connecting hook 13 is positioned above the seat part, and the seat cloth is used for playing a role in decorating and shielding the bottom of the seat frame A.
S2: the serpentine spring is an arch spring 14; as shown in fig. 1 to 6, one end of the arch spring 14 is connected to the connecting hook 13 at the front end of the seat frame a as a pre-connecting end 14a in advance; the other end of the arch spring 14 is formed with a free end 14b and naturally hangs down in the seating frame a. The seat frame A is connected with seat cloth matched with the seat frame A in outline size; the free end 14b of the arch spring 14 can naturally fall on the seat cloth under the action of gravity; so that the arch spring 14 has an arch shape at an intermediate position in the longitudinal direction. Wherein, the serpentine spring divide into and encircles spring and flat spring, and this patent chooses for use to encircle spring 14, encircles spring 14 and has the arch height for it is the shape that the intermediate position was encircleed after encircleing spring 14 initial connection. Moreover, the seat cloth is a structure which is arranged on the seat frame A per se; the seat cloth is ingeniously utilized to support the free end of the arch spring, so that the free end of the arch spring 14 is prevented from sinking into the seat frame; therefore, a plurality of arch springs 14 can be connected to the seat frame A side by side in advance, and then each arch spring 14 is assembled in sequence, so that the connection is more convenient.
S3: prefabricating an auxiliary connecting device B for stretching the arch spring 14; as shown in fig. 7-9, the auxiliary connecting device B includes a tilting rod 1, a pull rod 2, and a tension spring 3 disposed between the tilting rod 1 and the pull rod 2. The tilting rod 1 is longitudinally arranged, and the tilting rod 1 is a metal round rod; the rear end of the pull rod 2 is rotatably connected to the tilting rod 1; specifically, the method comprises the following steps: the pull rod 2 comprises a connecting plate 2a positioned at the rear end and in a side-standing state and a pull plate 2b positioned at the front end and in a horizontal state; a rotating support plate 4 extending forwards is correspondingly welded on the tilting rod 1, and the rotating support plate 4 is attached to the connecting plate 2a left and right; the rotating support plate 4 is connected with the connecting plate 2a through a screw rod 5 and a nut, and the screw rod 5 sequentially penetrates through the rotating support plate 4 and the connecting plate 2a from one side; the nut comprises an internal thread 6 and an external nut 7, the internal nut 6 and the external nut 7 are sequentially connected at the penetrating end of the screw rod 5, and a gasket 8 is arranged between the internal nut 6 and the external nut 7. In addition, after the connection is completed, the connecting plate 2a and the rotating support plate 4 can be rotationally connected through the screw 5, that is, the connecting plate 2a can rotate up and down by taking the screw 5 as a rotating shaft, so that the pull rod 2 can rotate relative to the tilting rod 1; then, the connecting plate 2a and the rotating support plate 4 can be stably connected through screw and nut connection; the rotary connection between the two can be realized; the structural design is simple and ingenious. Furthermore, an inner nut 6 and an outer nut 7 are respectively connected on the screw rod 5; if only one nut is adopted for connection, the nut can be loosened in the rotating process of the connecting plate 2a, and the connection is more stable due to the adoption of a double-nut structure; and the pull rod 2 rotates more stably.
As shown in fig. 8-9, the pull rod 2 is directly twisted by a metal plate in the left-right direction to form the connecting plate 2a and the pull plate 2 b; the metal plate is adopted, so that the structural strength of the pull rod 2 is high; and the metal plate is twisted for forming, so that the processing is quick and convenient. As shown in fig. 9, the front end of the pulling plate 2b is bent downward to form a pulling hook 9 capable of hooking with the arch spring 14. Specifically, the method comprises the following steps: the connecting plate 2a at the rear end of the pull rod 2 is in a side standing state so as to be convenient for rotary connection; the pull plate 2b at the front end of the pull rod 2 is in a horizontal state, so that a pull hook 9 is conveniently arranged; the structural design is ingenious, and the design consideration is more comprehensive.
As shown in fig. 7 and 8, the tension spring 3 is disposed between the tilting rod 1 and the pull rod 2 in an inclined state, specifically: a first bump 10 protruding upwards is arranged on the connecting plate 2a of the pull rod 2, and a second bump 11 protruding forwards is correspondingly arranged on the tilting rod 1; and the second lug 11 is positioned above the pull rod 2; through holes 12 are formed in the first bump 10 and the second bump 11; and two ends of the tension spring 3 are respectively hooked in the through holes 12 of the first lug 10 and the second lug 11. In addition, when the pull rod 2 is in an unstressed natural state, the pull rod 2 tends to be in a horizontal state.
The pull rod 2 is arranged in the middle of the warping rod 1; so that the seesaw bar 1 has a grip portion 1a located above the tie bar 2 and a prying portion 1b located below the tie bar 2. When the operation is performed, a user holds the gripping part 1a by hand, and can conveniently control the hook connection of the pull rod 3 and the arch spring 14; the prying part 1b can be abutted against the seat frame A conveniently; the position arrangement is reasonable, and each takes its own role.
S4: the arch spring 14 is stretched by the auxiliary connecting device B; as shown in fig. 2 and 3: firstly, an operator holds the gripping part 1a of the tilting rod 1, inclines the tilting rod 1 forwards, and hooks the draw hook 9 at the front end of the pull rod 2 at a position close to the free end 14b of the arch spring 14; then, as shown in fig. 4 and 5, the prying part 1b at the lower part of the seesaw rod 1 naturally props against the seat frame a and pulls the seesaw rod 1 backwards, so that the seesaw rod 1 generates lever motion backwards relative to the seat frame a; the warped rod 1 drives the pull rod 2 to move backwards, so that the pull rod 2 can act on the arch spring 14 to stretch backwards along the length direction of the seat frame A, and the free end 14b of the arch spring 14 moves backwards; correspondingly, the arch spring 14 generates an elastic force acting on the pull rod 2 to move downwards along with the stretching deformation, so that the pull rod 2 can rotate downwards relative to the warped rod 1 under the elastic force of the arch spring 1 in the process that the pull rod 2 stretches the arch spring 14 along with the movement of the warped rod 1; the tension spring 3 is correspondingly elastically deformed.
The pull rod 2 and the warping rod 1 are arranged in a rotating mode, and the tension spring 3 is arranged between the pull rod 2 and the warping rod 1; the pull rod 2 can perform self-adaptive rotation adjustment relative to the tilting rod 1 in the process of stretching the arch spring 14, so that the pull rod 2 can be always positioned at the position of the arch spring 14 with an effective stretching effect; the operation is more labor-saving.
Moreover, the draw hook 9 on the draw bar 2 can be directly and quickly hooked back and forth or separated from the arch spring 14, and the arch spring 14 is in an S-shaped structure, so that the hooking is very convenient; and the initial middle of the arch spring 14 is arched upwards; namely, the arch spring can be tilted by a certain height, so that when the tilting rod 1 rotates towards the seat frame A, the draw hook 9 of the pull rod 2 is easily hung at the corresponding position of the arch spring 14, the draw hook is convenient to hook and locate, the arch-shaped bending of the arch spring 14 plays a role in meeting, and meanwhile, the pull rod 2 is provided with a certain length and is convenient to extend forwards; therefore, the tilting rod 1 does not need to rotate by a large angle, and the pull rod 2 can be pulled to hang on the arch spring 14; and the body of the tilting rod 1 does not need to be penetrated with the arch spring 14.
S4: as shown in fig. 4-6, the tilting rod 1 is pulled backwards continuously, the arching spring 14 is pulled along the length direction of the seat frame until the free end 14b of the arching spring 14 tilts along with the change of self radian and spans the connecting hook; specifically, the method comprises the following steps: since the arch spring 14 is in an upward-arching shape at the middle position along the length direction in the initial state, the arch height at the middle position of the arch spring 14 is gradually reduced in the backward stretching process of the arch spring 14, that is, the arch height is reduced; the free end 14b of the arch spring 14 naturally tilts backwards and upwards along with the change of the radian of the arch spring 14, so that the free end 14b of the arch spring 14 can naturally stride across the connecting hook 13 backwards; then the rocker 1 is released, the free end 14b of the arch spring 14 can be firmly hooked on the connecting hook 13 under the action of the restoring elastic force of the arch spring 14, and the actions are completed in one step, so that the free end 14b of the arch spring 14 can be quickly hooked on the connecting hook 13.
The key points are as follows: the arch spring 14 is selected, so that the arch spring 14 is initially connected to the seat frame A in a bent state; the change of radian of the arch spring 14 in the backward stretching deformation process is utilized, so that the free end 14b of the arch spring 14 can naturally tilt and cross over the connecting hook 13; the free end 14b of the arch spring 14 can automatically stride over the connecting hook 13 without the need of positioning connection by an operator; later, operating personnel only need loosen stick-up pole 1 and can make the free end 14b of encircleing the spring hang on connecting hook 13 automatically, and the design is very ingenious for in the assembling process, operating personnel only need "draw one and put" to stick-up pole 1, can realize encircleing the assembly of spring 14.
Moreover, the tilting rod 1 performs lever motion around the seat frame A, so that the arch spring 14 can be easily tensioned; the operation is very light and labor-saving, and the installation efficiency of the arch spring 14 is greatly improved.
S6: after one arch spring 14 is connected to the seat frame A, the draw hook 9 at the front end of the pull rod 2 is separated from the arch spring 14, and the tension spring 3 can act on the pull rod 2 to quickly rotate upwards for resetting; the auxiliary connection means B is facilitated for assembling the next arch spring 14.
S7: the above steps S1-S6 are then repeated, so that the arch springs 14 can be quickly assembled side by side in sequence on the seat frame a. The assembled arch spring 14 is still in a shape that the middle position is slightly arched upwards on the seat frame A along the length direction; so that when a user sits on the sofa, the gravity of the user acts downwards on the arch spring 14, and the middle position of the arch spring 14 is bent downwards; thereby causing the arching spring 14 to approach a horizontal state; avoiding leaving the couch; so that the user feels comfortable when sitting on the sofa.
In conclusion, the arch spring assembling method of the invention combines the auxiliary connecting device B with the radian change of the arch spring 14 in the stretching and bending process, so that the free end 14B of the arch spring 14 can be quickly hooked on the connecting hook of the seat frame A, the quick assembly of the arch spring 14 is realized, the assembling process is light and labor-saving, and the installation efficiency is greatly improved.
Claims (12)
1. A seat frame coil spring assembling method is characterized in that: the assembling method comprises the following steps:
s1: prefabricating a seat frame; connecting hooks are respectively pre-installed on the front side and the rear side of the seat surface of the seat frame; the connecting hooks are semi-open, and the opening directions of the connecting hooks on the two sides of the seat frame are opposite;
s2: the spiral spring is an arch spring; one end of the arch spring is connected to the connecting hook at one side of the seat frame as a pre-connection end, and the other end of the arch spring correspondingly forms a free end and is positioned above the space surrounded by the seat frame; and the arch spring is in an upward-arching shape at the middle position along the length direction;
s3: prefabricating an auxiliary connecting device; the auxiliary connecting device comprises a tilting rod, a pull rod and a tension spring arranged between the tilting rod and the pull rod; the tilting rod is longitudinally arranged, the rear end of the pull rod is rotatably connected to the tilting rod, and the pull rod extends forwards relative to the tilting rod; the front end of the pull rod is provided with a drag hook which can be hooked with the arch spring;
s4: stretching the arch spring by using the auxiliary connecting device; the tilting rod is held by hand and the draw hook at the front end of the pull rod is hooked at a position close to the free end of the arch spring; the lower part of the raising rod is propped against the seat frame and the raising rod is pulled to move in a lever mode relative to the seat frame in the direction away from the seat frame; the warped rod drives the pull rod to move, so that the arch spring is stretched along the length direction of the seat frame; and the pull rod rotates downwards relative to the tilting rod under the action of the elasticity of the arch spring;
s5: the tilting rod is pulled backwards to enable the arch spring to be stretched to the extent that the free end of the arch spring tilts along with the change of the radian of the free end of the arch spring and spans the connecting hook; the warped rod is loosened, and the free end of the arch spring is hooked on the connecting hook under the action of the reset elasticity of the arch spring;
s6: the tilting rod is rotated forwards in the reverse direction to enable the drag hook at the front end of the pull rod to be separated from the arch spring, and the pull rod is rotated upwards to reset by the reset elasticity provided by the tension spring;
and S7, repeating the steps S1-S6, and assembling the arch springs on the seat frame side by side in sequence.
2. A seat frame coil spring assembling method as defined in claim 1, wherein: the seat frame is connected with seat cloth matched with the outline of the seat frame in size; in step S2, the free end of the arch spring naturally hangs down on the seat cloth.
3. A seat frame coil spring assembling method as defined in claim 1, wherein: in steps S4, S5, the arch height of the arch spring is gradually reduced as the arch spring is tension-deformed; and the free end of the arch spring moves upwards to stride over the connecting hook at the same time when the free end of the arch spring moves horizontally towards the connecting hook.
4. A seat frame coil spring assembling method according to claim 1 or 3, wherein: after the arch spring and the seat frame are assembled, the arch spring keeps the shape of an upper arch at the middle position along the length direction.
5. A seat frame coil spring assembling method as defined in claim 1, wherein: the pull rod is arranged in the middle of the tilting rod; and the warped rod is provided with a gripping part positioned above the pull rod and a prying part positioned below the pull rod.
6. A seat frame coil spring assembling method as defined in claim 1, wherein: the tension spring is obliquely arranged, one end of the tension spring is connected to the pull rod, and the other end of the tension spring is connected to the position, above the pull rod, of the warping rod; the tension spring is correspondingly elastically deformed in response to the downward rotation action of the pull rod so as to provide the upward rotation reset elastic force for the pull rod.
7. A seat frame coil spring assembling method as defined in claim 1, wherein: the pull rod tends to be in a horizontal state under the natural state of non-stress.
8. A seat frame coil spring assembling method as defined in claim 1, wherein: at S3, the tie bar is twisted in the left-right direction using a metal plate to form a connecting plate and a tie plate, the connecting plate is in a side-standing state, and the tie plate is in a horizontal state; the front end of the pulling plate is bent downwards to form the pulling hook.
9. A seat frame coil spring assembling method as defined in claim 8, wherein: the tilting rod is provided with a rotating support plate extending forwards; the connecting plate is attached to the left and right of the rotating support plate and is rotatably connected with the rotating support plate.
10. A seat frame coil spring assembling method as defined in claim 9, wherein: the connecting plate is connected with the rotating support plate through a screw and a nut; and the connecting plate can rotate up and down by taking the screw as a rotating shaft.
11. A seat frame coil spring assembling method as defined in claim 10, wherein: the nut comprises an inner nut and an outer nut; the inner nut and the outer nut are sequentially connected at the penetrating end of the screw rod, and a gasket is arranged between the inner nut and the outer nut.
12. A seat frame coil spring assembling method as defined in claim 8, wherein: the stick up the pole and be metal round bar, rotate the backup pad and stick up pole welded fastening.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539386.8A CN115055614A (en) | 2022-05-18 | 2022-05-18 | Seat frame coil spring assembling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210539386.8A CN115055614A (en) | 2022-05-18 | 2022-05-18 | Seat frame coil spring assembling method |
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| CN115055614A true CN115055614A (en) | 2022-09-16 |
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| CN202210539386.8A Pending CN115055614A (en) | 2022-05-18 | 2022-05-18 | Seat frame coil spring assembling method |
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| JP2013141705A (en) * | 2012-01-06 | 2013-07-22 | Suzuki Motor Corp | Spring pulling tool |
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