JP4456934B2 - Furniture folding legs - Google Patents

Description

  The present invention relates to a folding leg for furniture such as a table or a table that raises and lowers a leg by sliding on the top of a support.

  Conventionally, as shown in FIG. 13, a U-shaped leg 1 is rotatably provided on the back surface of the top plate 24, and a tip 2 ″ of a support 2 ′ is rotatably provided in the middle of the leg 1. A passage 9 is formed on the back surface of the elongated plate 8, and the leg 1 is slidably provided by sliding the support top 2 in the passage 9, and the first and second ends are provided at the inner and outer ends of the passage 9. The receiving portions 10a and 11a are formed, the support top 2 is positioned on the second receiving portion 11a, the leg 1 is held upright, and the support 1 is positioned on the first receiving portion 10a. Folding legs for furniture that hold down are known.

  Each of the conventional U-shaped legs 1 is integrally formed by bending a metal pipe such as iron. However, the raising and lowering leg portions a and a of the leg 1 are required to be made of wood from the viewpoint of warmth, the point of upgrading, and the point of safety. Therefore, the U-shaped wooden leg is integrally formed by bending, or the raising and lowering leg e is made of wood as shown in FIG. c ′, the bolt d is inserted into the loose insertion hole c and screwed into the nut f fixed in the horizontal portion b, the pin g is penetrated into the loose insertion hole c ′, and the tip 2 of the support 2 ′ is inserted. ”Can be pivotally connected to the pin g, but the former is extremely difficult to manufacture, and the latter (the failure example that the present inventor made in the present application and made a prototype during the invention) is a tree. However, the position between the distances l is likely to be distorted due to the influence of external factors such as temperature and humidity, and as a result, the top of the support is not accurately positioned at the positions of the first and second receiving parts, and is reliably held upright or lying down. In addition, the distance l is smaller than that of the embodiment of the present invention to be described later, and Jodo is low.

Japanese Utility Model Publication No. 61-32507

  The present invention is to make it possible to place the top of the support frame in a predetermined position regardless of external conditions such as temperature and humidity, and to ensure that the support is secured during the upset. Let it be an issue.

  It is another object of the present invention to make it possible to easily manufacture the leg raising / lowering means.

It is another object of the present invention to enable the legs to stand stably in a range where the user's feet of furniture such as a table do not touch the support.

  Another object is to increase the overall strength and stability.

  Furthermore, it is an object to make sure that the standing leg is locked securely both when standing and lying down.

  According to a first means of the present invention, a U-shaped leg is rotatably provided on the back surface of the top plate, and a tip of a support is rotatably provided in the middle of the leg, and an elongated plate is provided on the back surface of the top plate. A passage is formed, the top of the support is slid in the passage, and the legs are provided to be freely tilted, and first and second receiving portions are formed on the inner and outer ends of the passage, and the support is formed. In the folding leg for furniture, the top portion is positioned on the second receiving portion to hold the leg upright, and the support top portion is positioned on the first receiving portion and the leg is held down. The leg is shaped by connecting wooden upright legs to both ends of a metal rotating pipe located on the back side of the top plate, and the connecting means is an elongated metal at each end of the rotating pipe. The piece is fixed, and the first and second screw holes are screwed at intervals between the metal pieces, and are attached below the second screw hole. The tip of the eight-shaped support is pivotally provided on the inward pin portion, the fitting groove is cut from the inside upper side of each raising / lowering leg, the metal piece is fitted into the fitting groove, and each raising / lowering First and second loose insertion holes corresponding to the first and second screw holes are penetrated through the legs, and the first and second loose insertion holes are provided from the outside of each of the raising and lowering legs to the first and second loose insertion holes. The second bolt is loosely inserted and screwed into the first and second screw holes.

  The second means of the present invention is characterized in that the rotating pipe is a round pipe, and the round pipe is rotatably attached by a receiving tool attached to the back surface of the top plate. Further, the third means of the present invention is characterized in that the rotating pipe is a square pipe, and the square pipe is rotatably mounted around an axis of a hinge attached to the back surface of the top plate. It is what.

  The fourth means of the present invention is characterized in that the first screw hole screwed to each metal piece is located above the center of the rotating pipe.

  According to a fifth means of the present invention, the first elongated plate of the hinge is fixed to the back surface of the top plate, the second elongated plate is an L-shaped plate composed of an outer piece and an inner piece, and a square pipe is attached to the outer piece. The upward surface of the square pipe and the upper end plane of each upright leg are at the same height.

  According to a sixth means of the present invention, the means for holding the leg upright and holding the leg up is an arc-shaped chevron comprising a slanted first and second locking plate, respectively, and a slanting edge and a locking slanting edge connected thereto. Before and after the handle lever is integrally extended from below each locking plate, and the end of each handle lever bulges in the same direction as each locking plate and is attached below the passage. A front of each locking plate is rotatably provided on a pair of rotating shafts, and each locking plate is always protruded into the passage by a coil spring, and when the leg is raised by the coil spring, the second Pulling down the handle lever by positioning the top of the support on the second receiving portion side of the outer end via the locking oblique edge of the locking plate and pressing the bulging end of the handle lever toward the top plate Sometimes the second locking plate can be freely removed from the passageway. When the leg is folded by the coil spring, the top portion of the support is positioned on the first receiving portion side of the inner end via the locking oblique edge of the first locking plate, and the bulging end portion of the handle lever is It is characterized in that it is pressed toward the top plate and the first locking plate can be removed from the passage when the handle lever is lowered.

  According to the first means of the present invention, the top portion of the support can be placed at a predetermined position regardless of external conditions such as temperature and humidity, and the wooden support leg can be securely held during the start-up. be able to. In other words, the metal piece is fixed to the rotating pipe, and the tip of the support is rotatably provided at the inward pin portion attached to the metal piece, and the wooden tilting leg is directly attached to the rotating pipe or the inward pin. Are not directly attached to the wooden upright leg, so they are not affected by external factors such as temperature and humidity, and are not affected by the external factors such as temperature and humidity. There is no, and it can be ensured that the wooden legs are upside down.

  According to the 2nd and 3rd means of this invention, in addition to the effect of Claim 1, the leg raising / lowering means can be manufactured easily.

  According to the 4th means of this invention, in addition to the effect of Claim 1, there exists the following effect.

  The position of the inward pin portion on which the tip of the support is pivotably attached must be limited to a position where the support does not contact the user's foot, but the distance L between the inward pin portion and the first screw hole is large. The strength is higher. In other words, if the first screw hole is positioned at the center of the rotating pipe, the interval is reduced, but the present invention is increased by being positioned at the upper side, and the bolt tightening and the mounting of the inward pin portion are made of metal. Since it is performed on a piece, the strength is increased. Therefore, it is possible to make the legs stand up in a stable manner as long as the feet of the user of the furniture such as a table and a table do not touch the support.

  According to the fifth means of the present invention, in addition to the effect of the third aspect, the upward surface of the square pipe and the upper end plane of the upright leg can be brought into contact with the back surface of the top plate when the leg is upright. It can be increased and the stability is further improved.

  Moreover, since the rotating pipe is a square pipe, the first screw hole can be positioned further upward than the round pipe, as shown in FIG. The person's foot is not more reliably contacted.

  According to the 6th means of this invention, in addition to the effect of Claim 1, it has the following effect | action and effect.

  When raising the standing leg that is locked in the prone position, as shown in FIG. 8, the handle lever of the first locking plate is grasped to make it a virtual line position and the first locking plate is removed from the passage. When the leg is gripped and rotated in the standing direction, the top of the support slides outward in the passage, and after sliding of the top of the support, the first locking plate and The handle lever returns to the solid line position. When the raising and lowering leg is further rotated in the upright direction, the top of the support rod always presses the excluded oblique edge of the locking plate protruding into the passage by the spring pressure and passes through the second locking plate. Eliminate outside the road. When the top of the support is positioned on the receiving side of the outer end, the second locking plate returns to the original position due to the restoring force of the coil spring, and the bulging end of the handle lever is pressed against the top plate, The top of the supporting shaft is stably stopped via the locking inclined edge of the second locking plate, and the stability of the raising and lowering leg is maintained here. When folding the tilting leg, grab the handle lever, rotate the second locking plate clockwise, remove it from the passage, and rotate the gripping tilting leg in the folding direction. The top part slides inward in the passage, and after the support part top part slides, the first locking plate and the handle lever are returned to the solid line position by the spring pressure. That is, when the leg is tilted and the support top moves to the outer and inner ends of the passage, the support top comes to an accurate position and stability is improved, and as a result, the leg can be tilted with good stability.

  As shown in FIGS. 8 and 9, both ends of the elongated plate 8 made of an iron plate and having a groove 8′-shaped bottom surface and stepped side plates 8a, 8a in the longitudinal direction are bent upward, and the passage 9 of the branch top 2 is formed. And the receiving part 10a of the inner end of the support top part 2 and the receiving part 11a of the outer end are formed, and the locking plate insertion hole 13 is formed by notching an elongated hole immediately before the receiving parts 10a, 11a. Recesses are provided on both sides of the plate insertion hole 13 to form the bearings 14 and 14, and the rotating shafts 4a and 4b are wound and fixed, and the iron plates 16 and 16 having the locking plate insertion groove 15 are received by the receiving portion 10a, 11a is attached and fixed, and each iron plate 16 is further bent and extended inward to form horizontal attachment portions 17, 17, and the rotating shafts 4a, 4b are bearing together with the winding portion 16 'of the iron plate 16. 14, 14, and one locking plate 3 a, 3 formed with a thin iron plate An insertion hole 19 for the rotation shafts 4a and 4b is made in the front position of the shaft, and the shape of the locking plates 3a and 3b is changed to the convex arc-shaped exclusion inclined edges 5a and 5b and the convex arc-shaped engagements connected thereto as shown in the figure. An annular shape formed in a mountain shape having bevel edges 6a, 6b, provided with a spring end locking portion 20 at the bottom of the locking plates 3a, 3b, and having a finger hole 21 in the rear and covering a rubber cover 22 The handle levers 23a and 23b having the bulging end 23 'are integrally formed below and behind the locking plates 3a and 3b, and the bulging end 23' is formed in the same direction as the locking plates 3a and 3b. The locking plate 3a and 3b are inserted in the rotation shafts 4a and 4b so as to be rotatable, and the locking plates 3a and 3b are positioned immediately before the receiving portions 10a and 11a. 15 is inserted into the passage 9 and the coil springs 7 are wound around the rotating shafts 4a and 4b. One end of the coil spring 7 is inserted into and locked with the groove wall 8 ″ of the elongated plate 8, and the other end is locked with the spring end locking portion 20, and the locking plates 3 a and 3 b are always held by the elasticity of the coil spring 7. , Projecting into the passage 9, and the supporting spring top portion 2 existing when the raising and lowering leg 1 is raised is positioned on the receiving portions 11 a and 10 a side via the locking inclined edges 6 b and 6 a by the elasticity of each coil spring 7. Moreover, the bulging end portions 23 ′ of the handle levers 23 a and 23 b are pressed against the back side of the top plate 24 of the table by the elasticity of each coil spring 7.

  Furthermore, in the first embodiment, as shown in FIG. 1, a pair of U-shaped legs 1 and 1 are attached to substantially both ends of the back surface of the top plate 24 by synthetic resin receivers 27 and 27 so as to be freely rotatable. The tip 2 ", 2" of each 8-shaped support 2 'is pivotally mounted in the middle of the leg 1 and passes through a U-shaped support top 2 formed to have a width substantially equal to the width of the elongated plate 8. The sliding device is slidably placed on the path 9 and is fixed to the back surface of the top plate 24 with a pair of wood screws 28 and 28.

  1-3, the U-shaped leg 1 will be described in more detail. The horizontal portion to be attached by the receivers 27 and 27 is a rotation pipe 100 that can be rotated and made of a metal round pipe. Then, metal strips 101 and 101 such as iron pieces are fixed to both ends of the rotating pipe 100 by welding. Each metal piece 101 is provided with first and second screw holes 102 and 103 at intervals. The first screw hole 102 may be at the center position of the rotating pipe 100, but it is preferable that the first screw hole 102 is screwed at a position above the center as described later. A pin loose-insertion hole 104 is further drilled below the second screw hole 103 of each metal piece 101, penetrates the headed pin 105, and the head 106 is fixed to the metal piece 101 by welding. A plastic sleeve s is extrapolated to ′, and each pin loose insertion hole 2 a formed in the tip 2 ″, 2 ″ of the support 2 ′ is pivotally inserted into the inward pin portion 105 ′. The tip of ′ is formed in a rivet shape so that each tip 2 ″ is not rattled laterally, and the support 2 ′ is attached so as to be rotatable about the inward pin portions 105 ′ and 105 ′.

  Further, the raising and lowering legs 107 and 107 constituting each leg 1 are formed of wood such as beech oak wood. Then, the abutting portion 107 ′ is trimmed so that the tip portion of each raising and lowering leg 107 abuts against the back surface of the top plate 24 when the leg 1 is pivoted and cannot be pivoted. Further, the fitting groove 108 is cut from the inner upper end of each raising and lowering leg 107, the metal piece 101 is fitted into the fitting groove 108, and it corresponds to the first and second screw holes 102 and 103 from the outside of each raising and lowering leg 107. The first and second loose insertion holes 109 and 110 are horizontally penetrated. The first and second bolts 111 and 112 are inserted into the first and second loose insertion holes 109 and 110 from the outside of the raising and lowering legs 107, and the tips of the first and second screw holes 102, Tighten to 103.

  Further, in the second embodiment, as shown in FIG. 4, a pair of U-shaped legs 1 and 1 are pivotally attached to both ends of the back surface of the top plate 24 by hinges 270 and 270, respectively. The ends 2 ″ and 2 ″ of the support 2 ′ are pivotally attached to the middle of the leg 1, and the U-shaped support top 2 formed to have a width substantially equal to the width of the elongated plate 8 slides on the passage 9. The lock device is placed freely and fixed to the back surface of the top plate 24 with a pair of wood screws 28 and 28.

  4 to 7, each of the U-shaped legs 1 will be described in more detail. The horizontal portion to be attached by the hinges 270 and 270 is formed by a revolving and rotatable rotating pipe 100 made of a metal square pipe. Then, metal pieces 101 and 101, such as iron pieces, are fixed to the both ends of the rotating pipe 100 by welding, for example. At this time, the upper end of each metal piece 101 and the upper surface of the rotating pipe 100 made of a square pipe are fixed so as to be at the same height position. Further, as shown in FIG. 7, each hinge 270 has a first elongated plate 272 rotatably attached to the shaft 271 screwed to the back surface of the top plate 24 and a second elongated member attached to the shaft 271 to be rotatable. The plate 273 is formed of an L-shaped plate made up of an outer piece 274 and an inner piece 275, and the outer piece 274 is fixed to the inward surface of the rotating pipe 100 made of a square pipe by welding. As shown in FIG. 5, first and second screw holes 102 and 103 are screwed into each metal piece 101 at intervals. The first screw hole 102 may be at the center position of the rotating pipe 100, but it is preferable that the first screw hole 102 is screwed at a position above the center as described later. A pin loose insertion hole 104 is drilled further below the second screw hole 103 of each metal piece 101, penetrates the headed pin 105, the head 106 is fixed to the metal piece 101 by welding, and the inward pin portion 105. A plastic sleeve s is extrapolated to ′, and each pin loose insertion hole 2 a formed in the tip 2 ″, 2 ″ of the support 2 ′ is pivotally extrapolated to the inward pin portion 105 ′. The tip end of ′ is formed in a rivet shape so that each tip 2 ″ is not rattled laterally, and the support 2 ′ is attached so as to be rotatable around the inward pin portions 105 ′ and 105 ′.

  Further, the raising and lowering legs 107 and 107 constituting each leg 1 are formed of wood such as beech oak wood. And the upper end of the leg 1 is formed in a horizontal surface. Further, the fitting groove 108 is cut from the inner upper end of each raising and lowering leg 107, the metal piece 101 is fitted into the fitting groove 108, and it corresponds to the first and second screw holes 102 and 103 from the outside of each raising and lowering leg 107. The first and second loose insertion holes 109 and 110 are horizontally penetrated. The first and second bolts 111 and 112 are inserted into the first and second loose insertion holes 109 and 110 from the outside of the raising and lowering legs 107, and the tips of the first and second screw holes 102, Tighten to 103.

  10 and 11 show another embodiment of the locking device, which is the same as the first and second embodiments in which the means for holding the leg 1 lying down is the aforementioned locking device. A stopper 41 made of a synthetic resin is attached in the vicinity of the first receiving portion 10a, and the head portion 40 faces the passage 9. After the head portion 9 is pressed by the support top portion 2, The leg 1 is folded by being engaged with the receiving portion 10a, and can be manufactured at a lower cost than the form of the previous locking device. However, as will be described later, in the form of the lock device, the folded leg does not move finely, and the stability is better. Except for the above points, the configuration of the other locking device is the same as that of the previous locking device, and the same parts are denoted by the same reference numerals and the description thereof is omitted.

  In addition, in claim 1 of the scope of claims of the present application, not only the form of the previous locking device but also the form of the later locking device is included. If it is the same or equivalent to the structure of the legs, metal pieces, etc., and the means related to the tip of the support, a U-shaped leg is rotatably provided on the back of the top plate, and the tip of the support is placed in the middle of the leg. It is provided so as to be rotatable, and a passage is formed on the back surface of the top plate by an elongated plate. The leg is slid up and down by sliding the top of the support in the passage and is provided at the inner and outer ends of the passage. Forming a first and a second receiving part, positioning the support top to the second receiving part to hold the leg upright and positioning the support top to the first receiving part; Even if the concrete structure in the folding leg for furniture which holds the leg down is modified, it is included in the first aspect.

  Next, the usage and operation of the embodiment of the present invention will be described. First, in order to raise the tilting leg 107 folded as shown on the right side of FIGS. 1 and 4, the finger hole 21 shown in FIG. Hook the finger and rotate the handle lever 23a counterclockwise in FIG. 8 (clockwise in FIGS. 1 and 4). Here, the locking plate 3a rotates counterclockwise against the elasticity of the coil spring 7 as shown by a chain line in FIG.

  Therefore, if the raising and lowering leg 107 shown in FIGS. 1 and 4 is gripped and rotated in the direction of the arrow, the support top 2 slides in the right direction shown in FIG. If the handle lever 23a is released after passing through the support top 2, the locking plate 3a immediately returns from the chain line state to the solid line state in FIG. Subsequently, the sliding top portion 2 of the sliding member pushes down the exclusion oblique edge 5 b of the locking plate 3 b protruding into the passage 9 and removes the locking plate 3 b from the passage 9. That is, the locking plate 3b is rotated clockwise about the rotation shaft 4b against the elasticity of the coil spring 7 in FIG. Next, when the support top 2 passes the locking plate 3b, the contracted coil spring 7 starts to be restored, and the locking plate 3b automatically rotates counterclockwise about the rotation shaft 4b. 3b again protrudes into the passage 9, where the support top 2 is located on the receiving portion 11a side, its front peripheral surface is blocked by the locking inclined edge 6b and the bulging end 23 'of the handle lever 23b. Is pressed against the top plate 24 by the coil spring 7, and the leg 1 stands as shown on the left side of FIGS.

  At this time, as shown in FIG. 12, if the inward pin portion g ′ of the headed pin g penetrates the wooden raising / lowering leg e horizontally, it penetrates the raising / lowering leg e due to external conditions such as temperature and humidity. Because the position of the hole changes slightly, the position of the top of the support on the receiving side, the position of the locking plate, handle lever, etc. will be out of order, and the top of the support will be securely locked and the tilting leg e will be securely Not only is it difficult to hang down, but there is also the risk of falling down.

  On the other hand, in the embodiment of the present invention, as shown in FIGS. 2 and 5, the inward pin 105 ′ is fixed to the metal piece 101, so there is no error, and the support top 2 can be securely locked. As a result, the raising / lowering leg 107 can be surely suspended and there is no fear of falling down. Further, the projecting position of the inward pin portion 105 ′ needs to be in a position where the support 2 ′ does not touch the user's foot when the raising and lowering leg 107 stands, but the first screw hole 102 is formed on the rotating pipe. The distance L shown in FIGS. 2 and 5 is larger than the distance 1 shown in FIG. In addition, FIG. 6 shows the rotating pipe 100, the first screw hole 102, the second screw hole 103, and the inward pin portion 105 ′ by a virtual line in the first embodiment, and by a solid line in the second embodiment. However, in the second embodiment, the partial position can be further raised, the position of the support 2 'is further increased, and the support 2' touches the user's foot further. The upper surfaces of the raising and lowering legs 107 and the rotating pipe 100 are in contact with the rear surface of the top plate 24, so that the entire body becomes more robust and the stability is improved.

  Next, in order to fold the raising / lowering leg 107, as shown in FIGS. 8 and 9, a finger is put on the finger hole 21 of the locking plate 3b, and the handle lever 23b is rotated clockwise in FIG. Here, the locking plate 3 b rotates in the clockwise direction in FIG. 8 against the elasticity of the coil spring 7 and dies from the passage 9. Therefore, if the raising and lowering leg 107 is turned and turned forward, the support top 2 slides in the passage 9 and pushes down the excluded inclined edge 5a of the locking plate 3a protruding into the passage 9. The locking plate 3a is removed from the passage 9 as shown by a chain line in FIG. In other words, the locking plate 3 a is rotated counterclockwise in FIG. 8 around the rotation shaft 4 a against the elasticity of the coil spring 7 and sunk from the passage 9. Next, when the support top 2 passes through the locking plate 3a, the contracted coil spring 7 begins to expand, and the locking plate 3a automatically rotates clockwise about the rotation shaft 4a, as shown by the solid line in FIG. As shown in FIG. 2, the locking plate 3a protrudes again into the passage 9 and here the support top 2 is positioned on the receiving portion 10a side, and the rear portion is blocked by the locking oblique edge 6a. The bulging end portion 23 ′ of the lever 23 a is pressed against the top plate 24 by the coil spring 7, the raising / lowering leg 107 lies down, and the support top 2 is securely locked. At this time, as described above, the inward pin portion 105 'shown in FIGS. 2 and 5 is fixed to the metal piece 101 instead of the wooden raising and lowering leg 107, so that the support top portion 2 can be securely locked. 1 can be folded reliably.

It is a perspective view which shows the 1st Embodiment of this invention. It is a partially cutaway enlarged front view showing the main part of the same. It is AA sectional drawing same as the above. It is a perspective view which shows the 2nd Embodiment of this invention. It is a partially cutaway enlarged front view showing the main part of the same. It is BB sectional drawing same as the above. It is explanatory drawing which shows a rising state same as the above. It is a partially cutaway enlarged side view showing the locking mechanism of the present invention. It is a bottom view same as the above. It is a fragmentary perspective view which shows other embodiment of this invention. It is an expanded sectional view which shows a locking mechanism same as the above. It is comparison explanatory drawing with this invention. It is a perspective view which shows a part of prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 leg 2 branch top part 2 'branch 2 "tip 3a 1st locking plate 3b 2nd locking plate 4a rotating shaft 4b rotating shaft 5a exclusion inclined edge 5b exclusion inclined edge 6a locking inclined edge 6b engagement Stitch edge 7 Coil spring 8 Elongated plate 9 Passage path 10a First receiving portion 11a Second receiving portion 23 'Swelling end portion 23a Handle lever 23b Handle lever 24 Top plate 27 Receiving tool 100 Rotating pipe 101 Metal piece 102 First 1 screw hole 103 2nd screw hole 105 ′ inward pin portion 107 raising and lowering leg 108 fitting groove 109 first loose insertion hole 110 second loose insertion hole 111 first bolt 112 second bolt 270 hinge 271 shaft 272 First elongated plate 273 Second elongated plate 274 Outer piece 275 Inner piece

Claims (6)

A U-shaped leg is rotatably provided on the back surface of the top plate, a tip of a support is rotatably provided in the middle of the leg, and a passage is formed on the back surface of the top plate by an elongated plate, and the passage The leg is slid up and down in the road so that the leg can be raised and lowered, and first and second receiving parts are formed at the inner and outer ends of the passage, and the branch top is used as the second receiving part. In the folding leg for furniture which holds the leg upright while being positioned at the top and also holds the leg lying down by positioning the top of the fulcrum at the first receiving part, the U-shaped leg is the top of the top plate Each of the metal rotating pipes located on the back side is connected to both ends of a wooden raising and lowering leg, and the connecting means secures an elongated metal piece to each end of the rotating pipe. First and second screw holes are screwed at intervals on the piece, and an inwardly-shaped pin portion attached below the second screw hole has an eight-letter shape. The tip of the support rod is rotatably provided, a fitting groove is cut from the inside upper side of each raising / lowering leg, the metal piece is fitted into the fitting groove, and the first and second legs are fitted to each raising / lowering leg. The first and second bolts pass through the first and second loose insertion holes corresponding to the screw holes, and the first and second bolts are loosely inserted into the first and second loose insertion holes from the outside of each raising and lowering leg. A folding leg for furniture, which is screwed into the first and second screw holes. 2. The folding leg for furniture according to claim 1, wherein the rotating pipe is a round pipe, and the round pipe is rotatably attached by a receiving tool attached to the back surface of the top plate. 2. The folding leg for furniture according to claim 1, wherein the rotating pipe is a square pipe, and the square pipe is attached so as to be capable of revolving around a hinge shaft attached to the back surface of the top plate. The folding leg for furniture according to claim 1, wherein the first screw hole screwed to each metal piece is located above the center of the rotating pipe. The first elongated plate of the hinge is fixed to the back surface of the top plate, the second elongated plate is an L-shaped plate composed of an outer piece and an inner piece, and the inward surface of the square pipe is fixed to the outer piece, The folding leg for furniture according to claim 3, wherein the upward surface of the square pipe and the upper end plane of each standing leg are at the same height. The means for holding the leg upright and holding the leg down forms the first and second locking plates made of thin plates into arc-shaped chevron shapes each consisting of an excluded inclined edge and an engaging inclined edge connected thereto, The handle lever is integrally extended from below the plate, and the end of each handle lever bulges in the same direction as each locking plate, and is attached to the pair of front and rear rotating shafts attached below the passage. The front of each locking plate is rotatably provided, and each locking plate is always protruded into the passage by a coil spring, and when the leg is raised by the coil spring, the locking diagonal edge of the second locking plate The top end of the support is positioned on the second receiving portion side of the outer end via the boss, the bulging end portion of the handle lever is pressed toward the top plate, and the second locking plate is pulled down when the handle lever is lowered. Can be freely removed from the passage, and the coil spring When the legs are folded, the top of the support is positioned on the first receiving portion side of the inner end via the locking oblique edge of the first locking plate, and the bulging end of the handle lever is on the top plate side. 2. The furniture folding leg according to claim 1, wherein the folding leg is pressed to make the first locking plate freely removable from the passage when the handle lever is pulled down.

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