JP7823905B2 - Folding leg table - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. 1. From February 18 to 19, 2023, Zain Arts Co., Ltd. (7190-2 Shimauchi, Matsumoto City, Nagano Prefecture) exhibited and publicly displayed the "foldable leg table" of the claimed invention at SOTOWAKU PARK2023 [https://sotowakupark.jp/] held at Tokyo Big Sight South 3-4 Hall (3-11-1 Ariake, Koto-ku, Tokyo). 2. On May 19, 2023, Zain Arts Co., Ltd. (7190-2 Shimauchi, Matsumoto City, Nagano Prefecture) posted a link to the website [https://zanearts.com/products/][https://zanearts.com/products/detail.jp/] that it manages. 3. On May 21, 2023, Spacekey Corporation (1F Shibuya CH Building, 29-12 Sakuragaoka-cho, Shibuya-ku, Tokyo) began publishing a video about the "foldable leg table" according to the present invention on its YouTube channel [https://www.youtube.com/watch?v=04e9Nw9x-xs] under the name of the contributor of CAMP HACK, an outdoor web magazine run by the company. 4. On May 27-28, 2023, Zain Arts Co., Ltd. (7190-2 Shimauchi, Matsumoto City, Nagano Prefecture) exhibited the "foldable leg table" of the present invention at the Sabbatical Zain Arts Joint New Product Exhibition [https://zanearts.com/information/detail.php?id=2326] held at Akishima Mori Park Outdoor Village Indoor Plaza (610-4 Tanakacho, Akishima City, Tokyo). 5. On June 5, 2023, Space Key Co., Ltd. (29-12 Sakuragaokacho, Shibuya-ku, Tokyo, Shibuya CH Building 1F) posted a link to its website [https://camphack.nap-camp. com/9023] has begun publishing an article about the "foldable leg table" according to the present invention.

Article 30, Paragraph 2 of the Patent Act applies. 6. On July 24, 2023, Zane Arts Co., Ltd. (7190-2 Shimauchi, Matsumoto City, Nagano Prefecture) began publishing images of the manual for the "foldable leg table" according to the present invention on its website [https://zanearts.com/pwzane/wp-content/uploads/2023/07/toadtable_manual1.00.pdf].

The present invention relates to a foldable-leg table. More specifically, the present invention relates to a foldable-leg table that can be transformed from an in-use configuration (open state) to a configuration (closed state) that is convenient for storage and transportation by folding the legs relative to the tabletop.

In recent years, with the boom in outdoor activities such as camping, there has been a growing need for tables with foldable legs that can be easily carried to the desired location, and various innovative foldable leg tables have been proposed (see, for example, Patent Documents 1 and 2).

The foldable-leg table (1) disclosed in Patent Document 1 has a table top (2) and legs (3) rotatably attached to the table top (2). The legs (3) have a support rod (31) at the upper end and a ground rod (32) connected between the lower end of the support rod (31), and a reinforcing rod (7) extending diagonally relative to the ground rod (32) is installed between the support rod (31) and the ground rod (32). According to the foldable-leg table (1) disclosed in Patent Document 1, the installation of the reinforcing rod (7) makes it difficult for the support rod (31) to deform during use.

The folding table (1) disclosed in Patent Document 2 comprises a tabletop (10), foldable legs (21) that support the underside of the tabletop (10), and stays (30) that are connected at one end to the legs (21) and can be extended or retracted as the legs (21) open or close, and can be fixed at any length. According to the folding leg table (1) disclosed in Patent Document 2, the length of the stays (30) can be finely adjusted as needed depending on how the tips of the legs (21) contact the ground, allowing the legs (21) to be fixed in a taut state relative to the tabletop (10) by the stays (30), reducing rattling.

Utility Model Registration No. 3224047 Japanese Patent Application Laid-Open No. 2022-114972

The type of folding-leg table disclosed in Patent Document 1 is designed so that the tabletop is not supported by any components other than the legs, but is supported by stoppers near the base of the legs in the opening direction, allowing the tabletop to stand on its own using only the legs. However, when the tabletop is open, the load in the opening direction is concentrated at the base of the legs, which causes the tabletop to easily wobble, which is an issue.

In light of this, as in the type of folding-leg table disclosed in Patent Document 2, by configuring a support (such as stay 30 in Patent Document 2) that connects the tabletop and legs in a diagonal brace-like manner, the load on the base of the legs in the opening direction can be distributed to the support, making the tabletop less likely to wobble. For folding-leg tables that have supports that connect the tabletop and legs in a diagonal brace-like manner, a structure in which the support operates in conjunction with the opening and closing of the legs is desirable, allowing for quick transformation between the closed and open states for quicker use and storage. In the folding-leg table disclosed in Patent Document 2, the support (stay 30) is configured to be extendable, thereby realizing a structure in which the support operates in conjunction with the opening and closing of the legs. However, configuring the support to be extendable requires the use of a complex mechanism, such as an extension mechanism, to provide sliding points, which poses challenges such as increased cost, weight, and the risk of malfunction due to the complex mechanism.

In light of these issues, the object of the present invention is to provide a table with foldable legs that can be quickly used and put away without the need for complex mechanisms, and whose top is less likely to wobble.

In order to solve the above problems, the present invention provides a foldable leg table comprising a table top, leg attachments attached to the underside of the table top, leg frames attached to the leg attachments so that the table top can be switched between a use position in which it stands up from the underside and a storage position in which it is folded along the underside, a support frame for supporting the leg frame in the use position, and frame connectors connecting the leg frame and the support frame at positions separated from the leg attachments,
the frame connector connects the leg frame and the support frame so as to be relatively rotatable about a first rotation center line parallel to the rear surface, so that the leg frame and the support frame are in a closed state in which they are positioned on the same plane, and in an open state in which the support frame intersects with the leg frame at a predetermined angle;
The leg attachment device is characterized by comprising a support part that rotatably supports the leg frame and the support frame in the use position and the storage position around a second rotation center line parallel to the first rotation center line, and a lock part that locks the leg frame and the support frame in the open state when they are in the use position.

Furthermore, this foldable leg table is provided with a pair of leg attachments attached symmetrically at positions spaced apart in the left-right direction, where the direction along the first rotation center line on the back surface is the left-right direction,
The leg frame is formed from a metal wire rod and includes left and right leg frame end portions and a leg frame main body portion connecting these leg frame end portions, and the leg frame end portions are elastically deformable in a direction in which they are pushed outward in the left and right directions;
The support frame is formed from a metal wire rod and includes left and right support frame end portions and a support frame main body portion connecting the support frame end portions,
The support portions of the left and right leg attachments are provided with bearing portions inserted from the inside in the left-right direction so that the corresponding left and right support frame ends can rotate about the second rotation center line at a fixed position, and slide grooves inserted from the outside in the left-right direction so that the left and right leg frame ends of the leg frames can slide along the back surface in a front-to-rear direction perpendicular to the left-to-right direction to a position where a closed state is formed and a position where an open state is formed, and the leg frames can be rotated to a use position and a storage position,
The locking portions of the left and right leg attachments are provided with engagement projections that project outward in the left-right direction on groove opening end surfaces of the slide grooves that face outward in the left-right direction,
The engaging projections can be engaged with the leg frame that has slid over the engaging projections to the open state, thereby locking the leg frame and the support frame in the open state.

Furthermore, in the storage position, the frame portion connected to the leg frame end of the leg frame extends in the front-rear direction along the slide groove,
The engaging projection engages with the frame portion extending in the front-rear direction from the side opposite the rear surface, and serves as a stopper that holds the leg frame in the storage position.

Overall, this folding table is:
If the pair of left and right leg attachments are a pair of front leg attachments, and the leg frame, support frame, and frame connector are a front leg frame, a front support frame, and a front frame connector, respectively,
As leg attachments, a pair of left and right rear leg attachments are provided on the back surface of the tabletop, which are attached symmetrically at positions spaced apart in the front-to-rear direction from the front leg attachments,
The leg frames, support frames and frame connectors include a rear leg frame and a rear support frame that are spanned between a pair of left and right rear leg attachments in a state of front-to-back symmetry with respect to the front leg frame and the front support frame, and a rear frame connector that connects the rear leg frame and the rear support frame.

The present invention provides a table with foldable legs that can be quickly used and put away, and has a tabletop that is less likely to wobble, without the need for complex mechanisms.

1 is a perspective view of a table with foldable legs according to an embodiment, seen from above. FIG. 1B is a perspective view of the folding leg table shown in FIG. 1A, seen from the bottom side. FIG. 1B is a bottom view of the folding leg table shown in FIG. 1A. FIG. 1B is a side view of the folding leg table shown in FIG. 1A. 2 is a bottom view of the foldable leg table shown in FIG. 1 with the legs retracted. FIG. FIG. 2B is a side view of the folding leg table of FIG. 2A with the legs retracted. FIG. 1B is a perspective view of a leg attachment used in the folding leg table shown in FIG. 1A. FIG. 1B is a perspective view of a leg used in the folding leg table shown in FIG. 1A. 2B is an enlarged perspective view of the leg attachments and their surroundings of the folding-leg table in the state in which the legs of FIG. 2A are stored. FIG. 1B is a six-view diagram of the folding leg table shown in FIG. 1A. FIG. 2 is a six-view diagram of the foldable-leg table shown in FIG. 1 with the legs retracted. FIG.

(Overall structure of a folding table)
Fig. 1A is a perspective view of a folding leg table according to an embodiment as seen from the top, Fig. 1B is a perspective view of the table as seen from the back, Fig. 1C is a bottom view thereof, Fig. 1D is a side view thereof, Fig. 2A is a bottom view thereof, and Fig. 2B is a side view thereof, of the folding leg table with the legs folded in the storage position.

As shown in Figures 1A to 1D, the folding table 1 (hereinafter simply referred to as "table 1") comprises a top plate 2 with a rectangular contour, four leg attachments 3 attached to the four corners of the underside of the top plate 2, and a pair of legs 10 attached to the underside of the top plate 2 by the leg attachments 3. The leg attachments 3 are of the same structure and are arranged symmetrically in the long and short side directions of the top plate 2. One leg 10 is hung between a pair of leg attachments 3 arranged on both sides of the short side direction on the underside of the top plate 2, and the other leg 10 is similarly hung between another pair of leg attachments 3 arranged on both sides of the short side direction on the underside of the top plate 2. The pair of legs 10 are of the same structure and are arranged symmetrically in the long side direction of the top plate 2. In this specification, the direction of the short side of the tabletop 2 is referred to as the left-right direction X, the direction of the long side perpendicular to this is referred to as the front-back direction Y, and the direction perpendicular to the tabletop 2 (the direction perpendicular to the left-right direction X and the front-back direction Y) is referred to as the up-down direction Z.

The tabletop 2 is composed of a rectangular frame 21 and an inner plate 22 with a rectangular outline that closes a rectangular opening surrounded by the frame 21, and the top surfaces of these elements define a flat table surface. The tabletop 2 is formed, for example, from a thin metal plate with folded edges. The tabletop 2 has a separate structure that allows the inner plate 22 to be removed from the metal frame 21, but the tabletop 2 may also be made of resin, wood, stone, or a combination of these. It may also be a single plate instead of the frame 21 and inner plate 22. The tabletop 2 may also be a shape other than rectangular, such as an oval.

A pair of front and rear legs 10 are attached to the leg attachments 3 so that they can rotate about a rotation center line R2 (see Figure 1B) that extends in the left-right direction X parallel to the tabletop 2. The legs 10 can be switched from a usage position 10A in which they stand up from the back of the tabletop 2 as shown in Figures 1A-1D to a storage position 10B in which they are folded under the back of the tabletop 2 as shown in Figures 2A and 2B. Each leg 10 is composed of a leg frame 4 attached to the leg attachments 3, a support frame 5 for supporting the leg frame 4 in the usage position 10A, and a frame connector 6 that connects the leg frame 4 and the support frame 5 at a position away from each leg attachment 3. The frame connector 6 connects the support frame 5 to the leg frame 4 in a rotatable manner about a rotation center line R1 that is parallel to the rotation center line R2.

(Structure of each part)
Figures 3(a) and (b) are perspective views of the leg attachment 3 taken out and viewed from different directions, Figure 4 is a perspective view of the legs 10 taken out, and Figure 5 is a partially enlarged perspective view showing the area around the leg attachment 3 in a stored state where the legs 10 are folded under the back of the table top 2. The structure of each part of the table 1 will be described in more detail with reference to these figures.

First, the leg attachment 3 is a component formed, for example, by bending a metal plate. The leg attachment 3 includes a support portion 31 that rotatably supports the leg frame 4 of the leg 10 in the storage position 10B together with the support frame 5 around the rotation center line R2 in the upright use position 4A shown in Figures 1A-1D and in the folded storage position 4B shown in Figures 2A and 2B, and a lock portion 32 that locks the leg frame 4 in the use position 4A in an open state where it is supported in a diagonally braced state by the support frame 5.

Referring primarily to Figure 3, the support portion 31 of the leg attachment device 3 has a substantially rectangular base plate portion 31a that is elongated in the front-to-rear direction Y. Top plate mounting holes 31b are formed at both ends of the base plate portion 31a in the front-to-rear direction Y, and are used to screw the leg attachment device 3 to the underside of the tabletop. A semi-cylindrical protrusion extending in the left-to-right direction X is formed on the portion on one side of the top plate mounting hole 31b. This portion is attached to the underside of the tabletop 2 and functions as a bearing portion 31c that defines the pivot centerline R2 of the leg 10. A horizontal guide 31d is formed on the outer edge of the base plate portion 31a in the left-to-right direction X, rising approximately at a right angle along the edge. A side plate portion 31e that rises approximately at a right angle is also formed on the inner edge of the base plate portion 31a in the left-to-right direction X, and a lock portion 32 is formed contiguous with the leading edge of this side plate portion 31e in the up-down direction Z.

The locking portion 32 includes a generally rectangular slide guide 32a that extends in the left-right direction X from the side plate portion 31e of the support portion 31 and faces parallel to the base plate portion 31a. A slide stopper 32b is formed by bending the edge of the slide guide 32a opposite the bearing portion 31b in the left-right direction X toward the base plate portion 31a at a substantially right angle. An engagement protrusion 32c that protrudes outward in the left-right direction X is formed on the edge of the slide guide 32a extending in the front-rear direction Y, near the slide stopper 32b. A slide groove 33 that opens outward in the left-right direction X is formed between the base plate portion 31a of the support portion 31 and the slide guide 32a of the locking portion 32.

Referring primarily to Figure 4, the leg frame 4 is formed, for example, from metal wire and comprises left and right leg frame end portions 41 and a leg frame main body 42 connecting these leg frame end portions 41, with the leg frame end portions 41 being elastically deformable in the direction of expanding in the left-right direction X. The leg frame 4 is symmetrical and its width in the left-right direction X is narrower than the width of the tabletop 2 in the left-right direction X, with an overall shape that expands in a planar manner. The left and right leg frame end portions 41 are located on the same straight line extending in the left-right direction X. The leg frame main body 42 has a connecting portion 42a of a fixed length extending in the left-right direction X in its central portion in the left-right direction X. Continuing from the left and right ends of this connecting portion 42a are left and right inner tension portions 42b, which extend at an angle gradually away from the leg frame end portion 41 to the left and right, left and right ground contact portions 42c, which are formed by bending the tips of the left and right inner tension portions 42b at an acute angle toward the leg frame end portion 41, and left and right outer tension portions 42d, which extend from these left and right ground contact portions 42c to the left and right leg frame end portions 41.

The support frame 5 is formed, for example, from metal wire and includes left and right support frame end portions 51 and a support frame main body 52 connecting these support frame end portions 51. The support frame 5 is symmetrical and has an overall flat, wide shape. The left and right support frame end portions 51 are located on the same straight line extending in the left-right direction X. The support frame main body 52 has a connecting portion 52a of a certain length extending in the left-right direction X in its central portion in the left-right direction X. Continuing from the left and right ends of this connecting portion 52a are left and right bracing portions 52b that extend at an angle gradually approaching the left and right support frame end portions 51 and connect to the left and right frame end portions 51. The connecting portion 52a of the support frame 5 is approximately the same length as the connecting portion 42a of the leg frame 4.

The frame connector 6 interconnects the connecting portion 42a of the leg frame 4 and the connecting portion 52a of the support frame 5, aligning them side by side. Specifically, the frame connector 6 is an S-hook manufactured by bending a thin metal plate into an S-shaped cross section. Each hook portion embraces the connecting portion 42a of the leg frame 4 and the connecting portion 52a of the support frame 5. One of the hook portions is welded to the corresponding connecting portion, while the other hook portion holds the other connecting portion in a rotatable state about the rotation center line R1. In other words, the frame connector 6 connects the leg frame 4 and the support frame 5 so that they can rotate relatively about the first rotation center line R1 in a closed state in which the leg frame 4 and the support frame 5 are positioned on the same plane (see Figures 2A and 2B), and an open state in which the support frame 5 intersects with the leg frame 4 at a predetermined angle (see Figures 1A-1D).

The leg 10, which is composed of a leg frame 4 and a support frame 5 rotatably connected by a frame connector 6, is spanned across a pair of left and right leg attachments 3 attached to the underside of the tabletop 2. As shown in Figure 5, the support frame end 51 of the support frame 5 of the leg 10 is rotatably inserted into the bearing portion 31c of the leg attachment 3 from the inside in the left-right direction X. In other words, the support frame end 51 of the support frame 5 of the leg 10 attached to the underside of the tabletop 2 is rotatably supported around the rotation center line R2 defined by the bearing portion 31c of the leg attachment 3. The leg 10 can be rotated around the support frame end 51 (rotation center line R2) of the support frame 5 to switch between the use position 10A and the storage position 10B.

The leg frame end 41 of the leg frame 4 is inserted into the slide groove 33 of the leg attachment 3 from the outside in the left-right direction X, and the leg frame end 41 is slidable along the slide groove 33 and rotatable within the slide groove 33. In other words, the leg frame end 41 of the leg frame 4 is slidably supported within the slide groove 33 of the leg attachment 3 in the front-to-rear direction Y between a storage position 41B where the leg 10 is folded close to the support frame end 51 and away from the support frame end 51, and a use position 41A (see Figure 1C) where the leg 10 is erected.

(Operation of switching the legs 10 between the storage position and the use position)
Fig. 6 is a six-sided view showing the table 1 with the legs 10 raised to the use position 10A, and Fig. 7 is a six-sided view showing the table 1 with the legs 10 folded to the storage position 10B. In Figs. 6 and 7, (a) is a front view, (b) is a left side view, (c) is a right side view, (d) is a rear view, (e) is a front view, (f) is a bottom view, (g) is a perspective view seen from the top side, and (h) is a perspective view seen from the bottom side. The opening and closing operation of the legs 10 of the table 1 will be described in detail with reference to these figures.

When the legs 10 are in the storage position 10B, as shown in Figures 2 and 5, the leg frames 4 and support frames 5 of the legs 10 are in a closed state, folded onto the underside of the tabletop 2, in storage positions 4B and 5B. In this state, the leg frame 4 is sandwiched between the engagement protrusions 32c formed on the opening edge of the slide groove 33 of the leg attachment 3 and the underside of the tabletop 2. The engagement protrusions 32c function as stoppers that lock the leg frame 4 in the folded position 4B. In other words, the legs 10 are locked in the closed state 10B and cannot be opened unnecessarily.

When using the table 10, the legs 10 are switched from the storage position 10B to the use position 10A. First, the leg frame ends 41 on both sides of the leg frame 4 are forcibly spread apart in the left-right direction X to disengage them from the engagement protrusions 32c. In this state, when the leg frame 4 is raised from the storage position 4B in the standing direction D1 away from the underside of the tabletop 2 as shown in Figure 2B, the portion of the leg frame 4 connected to the leg frame ends 41 disengages from the engagement protrusions 32c to the side opposite the underside of the tabletop 2, allowing the legs 10 to be rotated from the storage position 10B to the use position 10A.

When the leg 10 is raised toward the use position 10A, the leg 10 rises from the underside of the tabletop 2, centered on the support frame end 51 (rotation center line R2) of the support frame 5. The leg frame 4 slides from the storage position 41B toward the use position 41A, with its leg frame end 41 rotating within the slide groove 33. In conjunction with the sliding of the leg frame end 41, the support frame 5 rises centered on the support frame end 51 (rotation center line R2). Furthermore, the support frame 5 gradually opens relative to the leg frame 4 from its stored state, where it is positioned on the same plane, centered on the connection portion (rotation center line R1) of the frame connector 6.

Raise the legs 10 toward the use position 10A, and while spreading the leg frame end portions 41 of the leg frames 4 in the left-right direction X, slide them over the engagement protrusions 32c formed on the opening edges of the slide grooves 33, slide them to the use position 41A, and release the spread of the leg frame end portions 41. As a result, the leg frame end portions 41 return inward due to their elastic restoring force, and are locked in the open position 41A. As a result, as shown in Figures 1A to 1D, the support frame 5 is locked in an open state relative to the leg frame 4, supporting the leg frame 4 like a diagonal brace. As a result, the legs 10 are locked in the use position 10A.

In this way, when the legs 10 are switched to the use position 10A, the support frame 5 supports the leg frame 4 and the tabletop 2 in a diagonal manner, preventing the load from concentrating on the leg frame 4 and reducing wobbling of the tabletop 2. Furthermore, the inner tension portion 42b and the outer tension portion 42d of the leg frame 4 are subjected to opposite forces in the front-to-back direction Y across the ground contact portion 42c, causing them to be slightly twisted in the front-to-back direction Y. This causes the outer tension portion 42d to press against the end face of the engaging protrusion 32c of the leg attachment 3, tightly adhering to the surface, reducing wobbling and ensuring that the leg 10 is securely locked in the use position 10A.

To return the leg 10 from the use position 10A to the storage position 10B, simply perform the reverse of the above steps. Specifically, to return the leg 10 from the use position 10A to the storage position 10B, the leg frame end 41 of the leg frame 4 of the leg 10 is elastically deformed so as to open outward in the left-right direction X, while the outer tension portion 42d of the leg frame 4 overcomes the engagement protrusion 32c, causing the leg frame end 41 of the leg frame 4 to slide along the slide groove 33 of the leg attachment 3 from the use position 41A to the storage position 41B. In conjunction with the sliding, the leg 10 rotates around the support frame end 51 and is folded from the use position 10A to the storage position 10B.

When the legs 10 are folded to a certain extent, the outer tension portions 42d of the leg frame 4 come into contact with the engagement protrusions 32c. While elastically deforming the leg frame end portions 41 of the leg frame 4 so that they open outward in the left-right direction X, the outer tension portions 42d are pushed toward the underside of the tabletop 2 until they clear the engagement protrusions 32c. The outer tension portions 42d of the leg frame 4 clear the engagement protrusions 32c and enter the slide grooves below them, causing the leg frame end portions 41 to slide to the closed position 41B, and the legs 10 are folded into the storage position 10B. In the storage position 10B, the engagement protrusions 32c prevent the legs 10 from moving from the storage position 10B. This completes the storage operation of the legs 10.

(Actions and Effects)
The foldable leg table 1 of the embodiment is comprised of a tabletop 2, a leg attachment 3 attached to the underside of the tabletop 2, a leg frame 4 attached to the leg attachment 3 so that it can be moved between a use position and a storage position, a support frame 5 for supporting the leg frame 4 in the use position, and a frame connector 6 connecting the leg frame 4 and the support frame 5, and does not have a particularly complicated mechanism. In this foldable leg table 1, the frame connector 6 connects the leg frame 4 and the support frame 5 so that they can rotate relatively around a first rotation center line R1 parallel to the underside, and the support part 31 of the leg attachment 3 supports the leg frame 4 and the support frame 5 in a closed state so that they can rotate between the storage position and the use position around a second rotation center line R2 parallel to the first rotation center line R1. As a result, the configuration of the foldable leg table 1 allows the leg frames 4 and the support frames 5 to be linked together around the second rotation center line R2 so that the table top 2 can be quickly raised from the storage position to the use position, and at the same time, the leg frames 4 and the support frames 5 rotate relatively around the first rotation center line R1 so that the support frame 5 supports the leg frame 4 in a diagonal brace-like manner, i.e., the table top 2 can be quickly transformed into a configuration that is less likely to wobble. Similarly, the configuration of the foldable leg table 1 allows the leg frames 4 and the support frames 5 to be linked together so that the table top 2 can be quickly folded from the use position to the storage position. Furthermore, the configuration of the foldable leg table 1 of the embodiment allows the locking portions 32 of the leg attachments 3 to lock the leg frames 4 and support frames 5 in the open state, making it even more difficult for the table top 2 to wobble.

Therefore, by configuring the table with foldable legs as in the embodiment 1, it can be used and put away quickly without the need for complex mechanisms, and the tabletop is less likely to wobble.

In the foldable leg table 1, the leg frames 4 and support frames 5 are formed from metal wire. The leg frame 4 is elastically deformable so that the leg frame end 41 is pushed outward in the left-right direction X. The leg attachment 3 is equipped with a bearing portion 31c into which the support frame end 51 is inserted so as to be rotatable about the second rotation center line R2, a slide groove 33 into which the leg frame end 41 is inserted so as to be slidable and rotatable in the front-to-rear direction, and an engagement protrusion 32c that protrudes from the groove opening end face of the slide groove 33 and engages with the leg frame 4 when it is slid to the open position, thereby locking the leg frame 4 and support frame 5 in the open position. The foldable leg table 1 is configured so that the leg frames 4 and support frames 5 are formed from elastically deformable metal wire, and the leg attachments 3 that support the frames 4 and support frames 5 are equipped with bearings 31c, slide grooves 33, and engagement protrusions 32c. This allows the leg frames 4 and support frames 5 to be linked together to open and close quickly without requiring a complex structure, and ensures strength in the open state while remaining lightweight.

In addition, in the foldable leg table 1, the engagement protrusion 32c engages with the frame portion connected to the leg frame end 41 of the leg frame 4 from the side opposite the back surface when in the stored position, acting as a stopper that holds the leg frame 4 in the stored position. Therefore, with the configuration of the foldable leg table 1, the leg frame 4 is held in the stored position by the engagement protrusion 32c, preventing the legs from accidentally opening, making it easy to carry.

(Other forms)
Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment and can be embodied in various forms without departing from the spirit of the present invention, and for example, the following modifications are also possible.

(1) The number, material, shape, position, size, etc. of the components described in the above embodiment are examples only and may be changed as long as the effects of the present invention are not impaired.

(2) In the above embodiment, the support frame 5 is formed from metal wire, but the present invention is not limited to this. For example, the support frame may be in the shape of a plate made of resin, metal, wood, etc.

(3) In the above-described embodiment, the leg frame 4 and support frame 5 are fixed to the leg attachment 3 so that the support frame 5 is rotatable about the second rotation center axis R2 and the leg frame 4 is slidable along the slide groove 33 by inserting the support frame end 51 of the support frame 5 into the bearing portion 31c of the leg attachment 3 from the inside in the left-right direction X and the leg frame end 41 of the leg frame 4 into the slide groove 33 of the leg attachment 3 from the outside in the left-right direction X. However, the present invention is not limited to this. For example, the leg frame and support frame fixed to be rotatable relatively about the first rotation center axis R1 may be fixed to the leg attachment using a leg attachment in which the bearing portions and slide grooves are arranged oppositely in the front-to-back direction Y from those in the embodiment, and the leg frame end of the leg frame is inserted into the bearing portion of the leg attachment so as to be rotatable about the second rotation center axis, and the support frame end of the support frame is inserted into the slide groove of the leg attachment.

(4) In the above embodiment, one engagement protrusion 32c has the function of locking the leg frame 4 at its end face when it is in the open state, and the function of holding the leg frame 4 on its inner surface when it is in the closed state. However, the present invention is not limited to this. For example, two engagement protrusions may be provided, each of which may be configured to have one of the functions.

(5) In the above embodiment, the frame connector 6 was described as an S-hook, but the present invention is not limited to this. Any connector that holds the leg frame and support frame in a rotatable manner relative to each other will suffice.

(6) In the above embodiment, the leg frame 4 and support frame 5 are described as having a shape that spreads out in a plane, but the present invention is not limited to this. For example, although the thickness increases when folded, the leg frame and support frame may have a three-dimensional shape formed by bending metal wire three-dimensionally.

(7) In the above embodiment, the front leg frames 4 and rear leg frames 4 are folded inward and are described as not overlapping in the closed state. However, this is intended to make the chair as thin as possible in the closed state, and the present invention is not limited to this. For example, in order to make the planar size compact in the closed state, the table top 2 may be folded along fold lines in the left-right direction centered in the front-to-back direction Y, so that the front leg frames and rear leg frames overlap.

1...Foldable leg table, 2...Table top, 3...Leg attachment, 4...Leg frame, 5...Support frame, 6...Frame connector, 10...Leg, 21...Frame frame, 22...Inner plate, 31...Support portion, 31a...Base plate portion, 31b...Table top attachment hole, 31c...Bearing portion, 31d...Horizontal guide, 31e...Side plate portion, 32...Lock portion, 32a...Slide guide, 32b...Slide stopper, 32c...Engagement protrusion, 33...slide groove, 41...leg frame end, 42...leg frame main body, 42a...connecting portion, 42b...inner tension portion, 42c...ground contact portion, 42d...outer tension portion, 51...support frame end, 52...support frame main body, 52a...connecting portion, 52b...tension portion, D1...standing direction, R1...first rotation center line, R2...second rotation center line, X...left-right direction, Y...front-back direction, Z...up-down direction

Claims (4)

The top plate and
a leg attachment attached to the back surface of the tabletop;
a leg frame attached to the leg attachment so as to be switchable between a use position in which the leg frame stands up from the back surface and a storage position in which the leg frame is folded along the back surface;
a support frame for supporting the leg frame in the use position;
a frame connector connecting the leg frame and the support frame at a position spaced apart from each of the leg attachments;
It is equipped with
The frame connector is
the leg frame and the support frame are connected to be relatively rotatable about a first rotation center line parallel to the rear surface so as to be in a closed state in which the end portions of the leg frame and the support frame that are closer to the leg attachment are brought close to each other and positioned on the same plane, and in an open state in which the end portion of the leg frame and the end portion of the support frame are separated from each other and the support frame intersects with the leg frame at a predetermined angle relative to the closed state,
The leg attachment is
a support portion that supports the leg frame and the support frame so that they can rotate between the use position and the storage position around a second rotation center line that is parallel to the first rotation center line;
a locking portion that locks the leg frame and the support frame in the open state at the use position;
A table with foldable legs, characterized by: The folding leg table according to claim 1,
a pair of leg attachments attached symmetrically at positions spaced apart in the left-right direction, where the direction along the first rotation center line on the back surface is defined as a left-right direction;
The leg frame is formed from a metal wire rod and includes left and right leg frame end portions and a leg frame main body portion connecting these leg frame end portions, and the leg frame end portions are elastically deformable in a direction in which they are pushed outward in the left-right direction,
The support frame is formed from a metal wire rod and includes left and right support frame end portions and a support frame main body portion connecting the support frame end portions,
The support portions of the left and right leg attachments are
a bearing portion into which the corresponding left and right support frame end portions are inserted from the inside in the left-right direction so as to be rotatable about the second rotation center line at a fixed position;
slide grooves into which the left and right leg frame end portions of the leg frame are inserted from the outside in the left-right direction in a state in which the leg frame can slide along the back surface in a front-rear direction perpendicular to the left-right direction to a position in which the closed state is formed and a position in which the open state is formed, and the leg frame can be rotated between the use position and the storage position;
It is equipped with
The locking portions of the left and right leg attachments are
an engaging protrusion protruding outward in the left-right direction from a groove opening end surface of the slide groove facing outward in the left-right direction;
A folding leg table in which the engagement protrusion can engage with the leg frame that has slid over the engagement protrusion to the open state position, thereby locking the leg frame and the support frame in the open state. The folding leg table according to claim 2,
In the storage position, a frame portion of the leg frame connected to the leg frame end portion extends in the front-rear direction along the slide groove,
The engaging protrusion engages with the frame portion extending in the front-to-rear direction from the side opposite the back surface, thereby serving as a stopper that holds the leg frame in the storage position. The folding leg table according to claim 3,
When the pair of left and right leg attachments are a pair of front leg attachments, and the leg frame, the support frame, and the frame connector are a front leg frame, a front support frame, and a front frame connector, respectively,
the leg attachments are provided on the back surface of the tabletop with a pair of left and right rear leg attachments attached symmetrically in the front-to-rear direction at positions spaced apart from the front leg attachments in the front-to-rear direction,
The leg-folding table is provided with the leg frames, the support frames and the frame connectors, which include rear leg frames and rear support frames that are spanned between a pair of left and right rear leg mounting devices in a state of front-to-back symmetry with respect to the front leg frame and the front support frame, and rear frame connectors that connect these rear leg frames and rear support frames.