KR20120002519U - Assembly structure of frame type dinner table or chair - Google Patents

Abstract

The present invention relates to a frame-type dining table or chair assembly structure, which is provided to form a frame of the dining table or chair, the first frame is a hollow frame on the inside and the second frame is a frame to be fastened, and the first frame And a fixing bolt for fastening and fastening the second frame to the at least one bolt hole of the first frame or the second frame, which is drawing-processed by rotational friction and pressing by a rod-shaped rod to form the first frame or the second frame. In the frame-type dining table or chair assembly structure of the boss is formed toward the hollow from the surface of the frame, the thread formed on the inner circumferential surface of the formed boss to fasten the fixing bolt; An insertion hole is formed in the first frame and the second frame of the upper or lower portion of the bolt hole, the entrance is tapered in a spherical shape, the insertion hole is provided with a fastening guide for providing a reference point when the fixing bolt is fastened It provides a frame-type dining table or chair assembly structure.
According to the present invention, the tightening force is excellent when bolting the frame for a dining table or chair, and it is possible to maintain a constant tightening force for a long time, so that it is not easy to loosen or loosen, thereby increasing the convenience of use, and at a low cost without any special deformation of the frame itself. The tightening force can be maximized, and in addition to the effect of improving the appearance quality, the assembly position can be specified during initial assembly, thereby further obtaining the effect of maximizing the convenience of assembly.

Description

ASSEMBLY STRUCTURE OF FRAME TYPE DINNER TABLE OR CHAIR}

The present invention relates to a frame-type dining table or chair assembly structure, and more particularly, to improve the tightening force of the bolt used when assembling and fixing the dining table or chair frame, and further improved frame type to have a more stable and robust assembly structure It relates to a table or chair assembly structure.

In general, the frame constituting the skeleton of the dining table or chair made of metal is mainly assembled and fixed to each other through the bolt fastening method to maintain the shape.

In particular, with the development of electronic commerce through the Internet, when purchasing the necessary items, such as chairs and dining tables in the Internet shopping mall, the assembly type is further accelerated to eliminate the inconvenience of delivery and to prevent the ease of movement and risk of damage.

In other words, the integrated chair or dining table, which is completed by welding the frame suitable for the purpose, is bulky and irregular in shape, resulting in inconvenience in transportation and greatly increasing the logistics cost. In addition, if any frame is damaged, the whole should be replaced. There are disadvantages.

In addition, it is difficult to store when not in use, and takes a lot of space.

In recent years, except for special cases, most of the chairs or dining tables have been developed that can be used by the user through simple tools. Most of them are designed to be fastened and secured using bolt-fastening frames. .

However, in the case of such a bolt fastening method there are the following problems.

For example, as shown in Figure 1, most of the current bolt fastening chair, dining table frame assembly structure is fastened with a fixing bolt 30 in a state where the first frame 10 and the second frame 20 are in contact with each other. In this case, most of the fastening force is generated by threads formed by the thicknesses of the first and second frames 10 and 20.

However, since the thickness of the first and second frames 10 and 20 is not thick due to the characteristics of the dining table or chair, which is required to be lightweight, the fastening force (fastening force) drops quickly and is easily loosened when subjected to external impact or torsion. there was.

These disadvantages will act as a complaint to the consumer, not only uncomfortable in the long-term use, but also create a squeaking noise, which further increases the displeasure, and the paint is easily peeled off due to the extreme friction around the fixing bolts 30, thereby making the appearance unsightly. Of course, there were many problems such as easy rust.

To solve this problem, nuts and auxiliary fixtures are used. However, in case of the external type, the appearance of the product deteriorates, and in the case of the internal type, that is, integrally formed inside the frame, the cost increases and most of the welding work is difficult. It is difficult and derives the disadvantage of increasing workmanship.

Another example of using the auxiliary fixture is a registered patent No. 008099 'desk', in the case of the disclosed patent is using an insert nut (insert nut) as an auxiliary fixture.

However, since the disclosed insert nut is a main member for improving the tightening force of the bolt, if it is provided as a separate member separated from the frame, there is a risk of loss, and it is very cumbersome and difficult because it needs to be assembled and applied with strong force after each work. There are disadvantages.

In addition, it is difficult to find the initial assembly position, and even if the assembly position to match the two frames, but even if a little force is applied to each other because there is a limit that workability is very bad.

Accordingly, in order to improve these problems, the applicant has the same name as the present invention, and a predetermined length is formed on the bolt hole through drawing processing, and the thread is formed by tapping the inner circumferential surface of the burr to make a thread. Patents have been filed for technology that dramatically improves tightening force, bolt fixation, etc. while maintaining the unitary, not separate.

Thus, there is a need for improvements to improve the convenience of assembly in production but in use.

As described above, the initial assembly time is increased because of the inability to specify the assembly position during initial assembly, resulting in inconvenience.

The present invention was devised by the necessity of technical improvement as described above, and further improved the convenience of assembling the frame-type dining table by further improving the patented technology pre- filed by the present applicant to specify the initial assembly position or Its main purpose is to provide a chair assembly structure.

The present invention is a means for achieving the above object, is provided to form a frame of the dining table or chair, the first frame and the second frame is the frame to be fastened and the inside frame is hollow inside, and the first frame and And a fixing bolt for fastening and fixing the second frame, wherein at least one bolt hole of the first frame or the second frame is drawing-processed by rotational friction and pressing by a rod-shaped rod to form the first frame or the second frame. A boss is formed toward the hollow from the surface of the, and the inner peripheral surface of the formed boss in the frame-type dining table or chair assembly structure is formed threaded so that the fixing bolt is fastened; An insertion hole is formed in the first frame and the second frame of the upper or lower portion of the bolt hole, the entrance is tapered in a spherical shape, the insertion hole is provided with a fastening guide for providing a reference point when the fixing bolt is fastened It provides a frame-type dining table or chair assembly structure.

At this time, the fastening guide is formed in the shape of a rod having a length corresponding to the width except for the thickness of each frame when the first frame and the second frame but the thickness of each frame from the central portion of the length of the fastening guide A pair of locking projections having a shape symmetrical to each other by a distance apart from each other is formed, a flat locking jaw is formed in the facing direction of the locking projections, the opposite direction is the inlet portion of the insertion hole tapered into the spherical shape Correspondingly, the round portion is formed to protrude.

In addition, both ends of the fastening guide are each formed with a further contact plate, the contact plate is convex in the direction facing each other, the opposite direction is formed concave in the concave part when the hollow inner surface of the first and second frames It is also characterized by being fixed to adsorption in the form of compression while forming a vacuum.

In addition, the fastening guide is formed by a pair of locking projections having a shape symmetrical to each other by the distance of the sum of the thickness of each frame from the center of the length of the fastening guide is formed, a flat locking projection in the facing direction of the locking projection It is also characterized in that the opposite direction is made of a structure in which the round portion protrudes to correspond to the inlet portion of the insertion hole tapered into the spherical shape.

According to the present invention, the tightening force is excellent when bolting the frame for a dining table or chair, and it is possible to maintain a constant tightening force for a long time, so that it is not easy to loosen or loosen, thereby increasing the convenience of use, and at a low cost without any special deformation of the frame itself. The tightening force can be maximized, and in addition to the effect of improving the appearance quality, the assembly position can be specified during initial assembly, thereby further obtaining the effect of maximizing the convenience of assembly.

1 is a partial exemplary view showing a conventional frame assembly structure.
Figure 2 is an exemplary perspective view of the basic configuration of the frame assembly structure according to the present invention,
3 is a cross-sectional view showing a boss forming process for the frame assembly structure according to the present invention.
4 to 6 is an exemplary perspective view showing another embodiment of the frame assembly structure according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Frame assembly structure according to an embodiment of the present invention is used when assembling the frames forming the skeleton of the instrument, such as a chair or a dining table.

And, Figure 2 is shown to illustrate the present invention in more detail shows an example of a table frame can sit a large number.

Therefore, the present invention is not limited to the table frame as illustrated in FIG. 2, which is illustratively described, and can be equally applied to all appliances having such a frame assembly structure.

As illustrated, for the present invention to be applied it must have at least two assembly frames.

For example, as shown in FIG. 2, the first frame 100 and the second frame 200 are the same.

In this example, the first frame 100 refers to a vertical frame in which the bolt is first inserted into the fastening side frame, and the second frame 200 is bolted to the fastening side frame by a bolt. In the example shown as the frame to be fastened close to the fastening side frame, it refers to a horizontal frame.

The first and second frames 100 and 200 are fastened and fixed by the fixing bolt 300 in a state in which they are in contact with each other.

In this case, all of the first and second frames 100 and 200 have a rectangular shape, and the inside thereof is hollow.

However, the shape of the first and second frames 100 and 200 is not necessarily limited to the quadrangle, and may be polygonal or circular.

On the other hand, the first and second frames (100,200) is formed with a bolt hole (not shown) in the position to be fastened to the fixing bolt 300 to bind them, the boss 400 is protruded in any one of the bolt hole .

The boss 400 may be formed in one or both frames of the first and second frames 100 and 200. Preferably, the boss 400 is formed in both of them to improve fastening force, and is formed only on one side of each frame. It should not be inconvenient during assembly, and should be formed inside the hollow to improve the appearance quality.

At this time, the embodiment of Figure 2 shows an example in which only one boss 400 is formed.

Here, the boss 400 does not simply pad or add a separate member by welding or other fixing method, but extends from the side frame itself in which the boss 400 is formed among the first and second frames 100 and 200. It is formed, it is made integral with the frame, the inner circumferential surface is a screw thread is processed, so that the fixing bolt 300 is bolted over a sufficiently long length, so that the tightening force is improved can be enough to withstand the rotation torque by external impact or torsion It is not easy to loosen.

Such a boss 400 may be formed in the same manner as the example shown in FIG. 3, for example, in a drawing process.

Referring to FIG. 3, a rod-shaped rod having a diameter corresponding to the bolt hole B to be formed on the surface of the base frame (F, first and second frames) (S, the bottom surface should be slightly convex) is applied at high speed. When pressed while rotating, the surface of the base material frame F and the rod-shaped rod S are rubbed with each other, thereby softening the base material structure at the bolt hole B formation position by frictional heat.

In this state, when the rod-shaped rod (S) is gradually pressed to form a boss (400) extended by 'D' while the corresponding portion is extended downward in the state as shown in Figure 3 (a) (b). .

In this way, when the boss 400 is formed to a desired length (D), it is possible to equip the assembly structure according to the present invention by processing the thread tap (threaded thread) T on its inner peripheral surface.

At this time, since the length D of the boss 400 is proportional to the radius of the bolt hole B, the protruding length D of the boss 400 can be adjusted according to the radius of the bolt hole B. As a result of the test, to provide sufficient tightening force, it was most suitable to extrude to 3-5mm.

It may not have sufficient tightening force to suppress the rotational torque generated by the external force when protruding to less than 3mm, if the thickness exceeds 5mm, the thickness of the boss 400 is thinner and the durability is sharply dropped, so it should be limited to the above range.

That is, the boss 400 according to the present invention is configured to sufficiently withstand the rotational torque generated by the external force by guiding the contact with the thread formed on the fixed bolt 300 over the largest possible area.

In addition, although not shown, the spacer may be further interposed to improve the fastening force.

In addition, the fastening bolt 300 is fastened to the outside from the inside of the frame is fastened, and because the end of the fixing bolt 300 is located inside the hollow of the frame, the appearance is also sharply improved.

In addition, as illustrated in FIGS. 4 to 6, a fastening guide 500, 500 ′, 500 ″ is further provided to secure the ease and smoothness of the fastening bolt 300 when initially fastening.

At this time, the fastening guide (500, 500 ', 500 ") is added to the basic assembly structure described above, reducing the fluidity when facing each frame during the initial assembly, providing a reference point to shorten the fastening time of the fixing bolt 300 In particular, women, senior citizens, and children can use a Phillips or flat head screwdriver to easily tighten and assemble.

In addition, in the past, assembling the holes (bolt ball) between the frames when assembling the frame, and then firmly gripped with the other hand so as not to twist the frame with one hand fixed bolt 300 with the other hand It was very inconvenient because the work must be made in the form of tightening the tool after inserting the insert, and in some cases it was very cumbersome because it must be assembled using limbs such as hands and feet, but in the present invention, the fastening guide (500,500 ', Since the reference point is determined by 500 "), assembling work is very convenient and easy to assemble by simply inserting the fixing bolt 300 and tightening with a tool while turning any one frame by turning the frame as the rotation axis. The time can be shortened.

To this end, the fastening guide (500, 500 ', 500 ") may have a variety of forms, in the present invention will be described by selecting the embodiment shown in Figures 4 to 6 as the most preferred model.

In addition, the fastening guide (500, 500 ', 500 ") is more elastic because it is elastic with rubber or synthetic resin having a good workability.

First, the fastening guide 500 illustrated in FIG. 4 has a length corresponding to the width except for the thickness of each frame when the first frame 100 and the second frame 200 are opposed to each other, and is formed in a rod shape.

In addition, a pair of locking protrusions 502 are formed to have a shape that is symmetrical to each other by a distance that sums the thicknesses of the frames based on a portion of the length of the fastening guide 500.

In this case, the direction in which the locking projections 502 face each other forms a flat locking projection 510, and the opposite direction forms a round portion 520 protruding in a substantially spherical shape.

Here, the reason why the symmetry point is described as part of the length is that the widths (that is, thicknesses) of the first and second frames 100 and 200 may be different from each other as shown in the drawing, and in the case of having the same width, they are symmetrically formed from the center of the length. It would be natural to be.

In addition, insertion holes 110 and 210 are formed in the first and second frames 100 and 200 so that the fastening guide 500 can be fitted therein. The insertion holes 110 and 210 are tapered to have an inlet in a spherical shape. The round part 520 is easily configured to enter, and the opposite side of the inlet is formed to be flat and vertical so that the locking jaw 510 is caught so that it cannot be easily pulled out.

In addition, the insertion hole (110, 210) is preferably formed in any one of the upper or lower centering around the fixing bolt 300, in some cases, may be formed on both upper and lower sides.

Thus, the fastening bolt 300 can be more easily fixed by inserting the fastening guide 500 before the fastening of the fixing bolt 300, that is, at the beginning of assembly.

For example, one end of the fastening guide 500 is first inserted into the insertion hole 110 of the first frame 100.

When a little more force is applied in that state, the rounded portion 520 of the fastening guide 500 is elastically deformed and passes through the insertion hole 110 while riding the entrance of the tapered insert hole 110. 510 is caught on the inner surface of the first frame (100).

At the same time, the inserted end of the fastening guide 500 is grounded to the opposite inner surface of the first frame (100).

In this state, when the insertion hole 210 of the second frame 200 is inserted into the other end of the fastening guide 500 in the same manner, the first and second frames 100 and 200 are fastened to the fastening guide 500 in the form as shown. It can be supported by the reference point.

In addition, in this case, since the first and second frames 100 and 200 are all constrained by the fastening guide 500, only the rotational flow is possible using the fastening guide 500 as the rotation axis, and the phenomenon of spacing or twisting is suppressed. .

Accordingly, the user can easily assemble the first and second frames 100 and 200 by simply fitting the fixing bolts 300 and fastening them to the boss 400.

As another example, the fastening guide 500 ′ as shown in FIG. 5 has the same structure as that of the fastening guide 500 shown in FIG. 4, but a close contact plate 530 is further formed at both ends.

At this time, the contact plate 530 is convex toward each other, that is, toward each end, and formed concave toward the inner surface of the first and second frames (100,200) in the opposite direction, the concave portion during pressing It is configured to be adsorbed in a form that is compressed while forming a vacuum on the inner surface of the two frames (100,200).

To this end, the length of the fastening guide 500 'may be shorter than the length of the fastening guide 500 illustrated in FIG.

As another example, the fastening guide 500 ″ as shown in FIG. 6 eliminates an extension portion extending from the round portion 520 toward the inner side surfaces of the first and second frames 100 and 200 and thus has a very short length. The first and second frames 100 and 200 may have a structure that is slightly larger than the sum of the thicknesses.

In addition, although not shown, the three embodiments described above do not have a symmetrical structure, and a structure formed only on one side thereof may be possible.

By adding such fastening guides (500, 500 ', 500 ") to ensure the ease of fastening, and shortening the fastening time, it is possible to perform a stable fastening work has the advantage that the elderly, women, children, etc. can be assembled very easily. .

In addition, the surface in contact with the thread of the fixing bolt 300 is further increased to increase the tightening force as well as the tightening force, and therefore, even if the rotational torque to loosen the fixing bolt 300 due to external impact or torsion, the tightening force, That is, since the tightening force is greater than this rotation torque, the fixing bolt 300 is not easily released and can maintain a continuous fastening state for a long time, so that the fastening portion is not loosened or noises such as squeaking caused by it are not generated. (300) Since the fastening part does not flow and the painted surface of the part is not peeled off, it is possible to obtain the advantage that the appearance quality is improved, and the fastening guide (500,500 ', 500 ") produces an auxiliary fixing effect, thereby fixing and fastening. The advantage that the holding force is further increased can also be obtained.

100: first frame 110,210: insertion hole
200: second frame 300: fixing bolt
400: Boss 500,500 ', 500 ": Fastening Guide
510: locking jaw 520: round part

Claims (4)

It is provided to form a frame of the dining table or chair, and includes a first frame which is a hollow frame on the inside and a second frame that is a frame to be fastened, and a fixing bolt for fastening and fixing the first frame and the second frame. At least one bolt hole of the first frame or the second frame, the drawing process by the rotational friction and press method by the rod-shaped rod to form a boss toward the hollow from the surface of the first frame or the second frame, the boss formed In the inner peripheral surface of the frame-type dining table or chair assembly structure is formed threaded so that the fixing bolt is fastened;
The first frame and the second frame of the upper or lower portion based on the bolt hole is formed with the insertion hole is tapered in the entrance,
The insertion hole is frame-type dining table or chair assembly structure, characterized in that the fastening guide is provided to provide a reference point when the fixing bolt is fastened.
The method according to claim 1;
The fastening guide is formed in a rod shape having a length corresponding to the width except for the thickness of each frame when the first frame and the second frame are butted together,
A pair of locking projections having a shape symmetrical to each other apart from each other by the distance of the sum of the thicknesses of the frames from the central portion of the length of the fastening guide is formed, a flat locking projection is formed in the facing direction of the locking projections, the opposite direction Frame-type dining table or chair assembly structure, characterized in that made of a structure in which a rounded portion protruding to correspond to the inlet portion of the insertion hole tapered into the spherical shape.
The method according to claim 2;
Both ends of the fastening guide are each formed with a further contact plate, the contact plate is convex in the direction facing each other, the opposite direction is formed concave in the concave portion when pressed to the hollow inner surface of the first and second frames Frame-type dining table or chair assembly structure, characterized in that the suction is fixed in the form of pressing while forming.
The method according to claim 1;
The fastening guide is formed by a pair of locking projections having a shape symmetrical with each other apart from the distance of the sum of the thickness of each frame from the center of the length of the fastening guide, a flat locking projection is formed in the facing direction of the locking projection, The opposite direction is a frame-type dining table or chair assembly structure, characterized in that the rounded portion formed to protrude to correspond to the inlet of the spherical tapered insertion hole.

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