JP6694572B2 - Furniture with flap top plate - Google Patents

Description

  The present invention relates to a furniture with a flap top, which is used in offices, schools and the like, and in which the top can be flapped between a use posture and a flip-up posture.

  BACKGROUND ART As a furniture with a ceiling plate used for meetings in an office or the like, a furniture with a ceiling plate capable of performing a flap operation from a use posture to a flipping posture is widely known. The top plate of this type of furniture with a flap top plate is supported by a left and right top plate support mechanism having lock claws on its legs so that it can be locked in either a use position or a flip-up position. .. Then, operation levers for releasing the locked state by the lock claws are provided on the left and right, and the locked state is released by operating one of these operation levers from the non-operating position to the operating position to release the top plate. The posture can be changed (for example, see Patent Document 1).

  However, in the conventional configuration, when one of the operation levers is operated, the other operation levers are also interlocked and moved from the non-operation position to the operation position. At this time, the operating lever on the non-operated side suddenly moves, giving a feeling of strangeness to a person in the vicinity.

JP-A-2000-116440

  In view of the above points, the present invention has an object to suppress the occurrence of a problem in a furniture with a flap top plate provided with a plurality of operation levers, which is caused by an abrupt movement of an operation lever that is not operated.

In order to solve the above problems, the furniture with a flap top plate according to the present invention has a configuration as described below. That is, the furniture with the flap top plate according to the present invention supports the top plate so that it can be locked in either the use position or the flip-up position via a plurality of top plate support mechanisms having lock claws on the legs. It will, be one obtained by to change the posture of the top board to release the locked state by the locking pawl by manipulating one of the plurality of the operating lever to the operating position from the non-operation position, all of the A pawl interlocking mechanism that interlocks the lock pawls of the top plate support mechanism in both forward and reverse directions in synchronization, and an operating force applied to one of the operation levers is transmitted to the lock pawls, but the movement of the lock pawls is different. The operating force transmission mechanism configured not to be transmitted to the operating lever, and the urging mechanism for causing the operating lever to return to the non-operating position by itself , each top supporting mechanism supports the top. The operation lever is pivotally attached to the front end part of the top plate receiver, and the operation end side closes the lower surface at the front end part of the top plate receiver and the operation end side is the top plate. It can be rotated between an operation position separated from the receiver .

  With such a configuration, the operating force applied to any one of the operating levers and transmitted to the lock claw is not transmitted to the other operating lever, and the operating lever to which no operating force is applied is the biasing mechanism. Since it is urged toward the non-operating position by the other operating lever, the other operating lever does not move abruptly when an operating force is applied to one of the operating levers.

As an example of a specific configuration of each top plate support mechanism in such a furniture with a flap top plate, a shaft plate attached to the leg body and having a first locking part and a second locking part, and a shaft plate The top plate receiver rotatably supported by a plate via a support shaft to support the top plate, and the first locking part and the second locking part of the shaft plate provided on the top plate receiver. And a lock claw for selectively holding the top plate in a use posture or a flip-up posture.

  As a structure for realizing the above-described pawl interlocking mechanism with a simple mechanism, a drive shaft provided on each lock pawl and an operation interlocking beam connecting the drive shafts to each other in a synchronously rotatable manner are provided. Is mentioned.

  As an example of a specific configuration of the operating force transmission mechanism, an advancing / retreating member that moves forward / backward in response to a movement of the operating lever from a non-operating position to an operating position, and a member provided between the advancing / retreating member and the lock claw are provided. The one-way engaging portion that transmits only the one-way movement of the advancing / retreating member to the lock claw is included.

As an example of a configuration for easily realizing the above-mentioned one-way engaging portion, the end opposite to the operation lever is located at the lock claw side end of the advancing / retreating member that connects the operation lever and the lock claw. It is provided with a closed slit and a drive projection provided on the lock claw and movably engaged with the slit, and only when the advancing / retreating member is actuated in one direction by an operating force applied to the operating lever. An example is one in which the drive projection comes into contact with the end of the advancing / retreating member on the side opposite to the operation lever so that the operation force is transmitted to the lock claw.

On the other hand, as an example of the configuration of the advancing / retreating member described above, a member main body that moves forward / backward in the longitudinal direction by an operating force applied to the operating lever, and a turnback portion that is provided so as to turn back at the tip of the member main body are provided. And the slit is formed between the member body and the folded portion.

  According to the present invention, in a furniture with a flap top plate provided with a plurality of operation levers, it is possible to suppress the occurrence of a defect caused by the abrupt movement of an operation lever that is not operated.

The perspective view which shows the use attitude | position of the furniture with a flap top plate which concerns on one Embodiment of this invention. The side view which shows the use posture of the furniture with a flap top plate which concerns on the same embodiment. The perspective view which shows the flip-up posture of the furniture with the flap top plate which concerns on the same embodiment. The side view which shows the flip-up posture of the furniture with the flap top plate which concerns on the same embodiment. The front view which expands and shows the principal part at the time of taking the flip-up posture of the furniture with a flap top plate which concerns on the same embodiment. AA sectional drawing in FIG. BB sectional drawing in FIG. CC sectional drawing in FIG. The disassembled perspective view which shows the furniture with the flap top plate which concerns on the same embodiment. The disassembled perspective view which shows the top support mechanism which concerns on the same embodiment. The disassembled perspective view which shows the top support mechanism which concerns on the same embodiment. The front view which expands and shows the principal part at the time of taking the use posture of the furniture with a flap top plate which concerns on the same embodiment. FIG. 13 is a sectional view taken along line DD of FIG. 12. FIG. 13 is a sectional view taken along line EE in FIG. 12. F-F sectional drawing in FIG. FIG. 3 is an operation explanatory view of the top plate support mechanism according to the same embodiment. FIG. 3 is an operation explanatory view of the top plate support mechanism according to the same embodiment. FIG. 3 is an operation explanatory view of the top plate support mechanism according to the same embodiment.

  An embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 to 18, this embodiment is a case where the present invention is applied to a furniture with a flap top plate called a flap table.

  As shown in FIGS. 1 to 4 and 9, the furniture with a flap top plate includes a pair of left and right legs 1A and 1B, a top plate 2 arranged on the legs 1A and 1B, and the top plate. A pair of left and right top plate supporting mechanisms 3A and 3B for supporting the legs 2 on the respective legs 1A and 1B so as to be able to perform a flap operation between a use posture (U) and a flipping posture (F), and both tops. The plate support mechanisms 3A and 3B are provided with a connecting beam 4. The left and right top plate support mechanisms 3A, 3B and the connecting beam 4 for connecting the top plate support mechanisms 3A, 3B together form a mechanical unit 5 which is the core of the platform. Hereinafter, each of the components will be described in detail.

<Legs>
As shown in FIGS. 1 to 4 and 9, the left leg body 1A includes a leg base 11 extending in the front-rear direction, a column 12 standing upright from a central portion in the longitudinal direction of the leg base 11, and the leg base. The casters 14 are provided at the front and rear ends of the shaft 11, respectively.

  As shown in FIGS. 1 to 4 and 9, the right leg 1B has a bilaterally symmetrical shape with the left leg 1A described above, and the same or corresponding parts are designated by the same reference numerals. The description is omitted.

<Top plate>
As shown in FIG. 1, FIG. 3 and FIG. 9, the top plate 2 has a rectangular shape elongated in the left-right direction, and has the same configuration as a normal wooden top plate, for example. A reinforcing material 8 is attached to the lower surface 2a of the top plate 2 between the two ends of use. Then, top plate receivers 32 constituting the top plate supporting mechanism 3 are attached to the left and right ends of the lower surface 2a of the top plate 2, respectively.

<Top support mechanism>
As shown in FIGS. 5 to 15, the left top plate support mechanism 3A includes a shaft plate 31 attached to the leg 1A, and a top plate that is axially supported by the shaft plate 31 and receives the top plate 2 on its upper surface. A receiver 32 and a lock claw 33 for selectively locking the top plate receiver 32 in the use posture (U) and the flip-up posture (F) are arranged. That is, the top plate support mechanism 3A includes a shaft plate 31 attached to the leg 1A and having a head portion 312 in an upper half thereof, and a top plate receiver 32 axially supported by the head portion 312 of the shaft plate 31, The top plate receiver 32 is provided with a lock claw 33 for locking the top plate.

  As shown in FIGS. 5 to 15, the shaft plate 31 has a mounting portion 311 mounted on the inner surface of the leg body 1 using a bolt 310, and the ceiling plate receiver 32 extending upward from the mounting portion 311. And a head portion 312 for axially supporting the shaft via a support shaft 313.

  As shown in FIGS. 5 to 7 and 10 to 13, the head portion 312 of the shaft plate 31 includes a head portion main body 303, a first hook receiver 301, and a second hook receiver 302. ..

  The head portion main body 303 receives the top plate 2 that has reached the use posture (U) by the upper end surface 303a via the top plate receiver 32.

  The inner surface of the head portion body 303 of the first claw receiver 301 is integrally provided on the crocodile, and a horizontal lock portion 331 of the lock claw 33, which will be described later, is engaged with the top plate 2 in the use posture ( It has the 1st locking part 301a which locks to U). The front surface 301x of the first claw receiver 301 is flush with the front surface 303b of the head body 303. The first locking portion 301a has a concave shape that is open to the front surface 301x and the inner side surface 301y.

  The second claw receiver 302 is integrally provided on the inner side surface 301y of the first claw receiver 301, and a flip-up lock portion 332 of the lock claw 33, which will be described later, is engaged to bounce the top plate 2. It has a second locking portion 302a that locks in the raised position (F). Further, the second claw receiver 302 is provided with an eaves shape integrally projecting on the inner side surface 301y of the first claw receiver 301 with the front surface 302x being set rearward of the front surface 303b of the head portion body 303. belongs to. The second locking portion 302a has a V-shape in a side view, which is recessed in the upper end surface 302b of the second pawl receiver 302.

  Here, the shaft plate 31 including the head part 312 including the head part body 303, the first claw receiver 301 and the second claw receiver 302, and the mounting part 311 is made of aluminum die cast. It is molded integrally. The first locking portion 301a and the second locking portion 302a are offset from each other in the thickness direction (horizontal direction). More specifically, a first claw receiver 301 including the first engaging portion 301a is provided such that the inner surface of the head portion body 303 is adjacent to the crocodile, and the first claw receiver 301 is further provided. A second claw receiver 302 including the second engaging portion 302a is provided adjacent to the inner surface 301y. The upper end surfaces 301b and 302b of the claw receivers 301 and 302 are flush with the upper end surface 303a of the head body 303.

  As shown in FIGS. 5 to 8 and 10 to 15, the top plate receiver 32 is extended from the upper plate 321 attached to the lower surface 21 of the top plate 2 and both side edges of the upper plate 321. The pair of side plates 322 and 323 are provided on both sides of the head portion 312.

  As shown in FIGS. 5 to 8 and FIGS. 10 to 15, the upper plate 321 is a flat plate-shaped member that comes into close contact with the lower surface 21 of the top plate 2, and is attached to the top plate 2 using mounting screws (not shown). ing. In addition, a convex portion 321a that protrudes downward is provided at the central portion in the longitudinal direction on the lower surface of the upper plate 321. In the use posture (U), the convex portion 321a hits the upper end surface 303a of the head portion body 303 and the upper end surface 301b of the first claw receiver 301 in the head portion 312. Further, in the use posture (U), a space C3 is formed between the portion of the upper plate 321 other than the convex portion 321a and the upper end surface of the head portion 312 of the shaft plate 31.

  As shown in FIGS. 5 and 10 to 12, the side plates 322 and 323 extend from both side edges of the upper plate 321 and are located on both sides of the head portion 312. Between the both side plates 322, 323 of the top plate receiver 32 and the head part 312, gaps C1, C2 having a predetermined width are formed. The side plates 322, 323 are provided with a support shaft through hole 325 through which the support shaft 313 penetrates, and a lock claw drive shaft through hole 326 through which a lock claw drive shaft 333 supporting the lock claw 33 penetrates. ing.

  As shown in FIGS. 5 to 7 and 10 to 14, the lock claw 33 includes a horizontal lock portion 331 having a sickle shape in a side view, which engages with the first lock portion 301a, and the second lock. An arm-shaped flip-up lock portion 332 that engages with the portion 302a is integrally provided, and the lock pawl drive shaft 333 is integrally rotatably provided at the base end portion. The horizontal lock portion 331 and the flip-up lock portion 332 are deviated from each other in the thickness direction. That is, the base end portion of the flip-up lock portion 332 is formed integrally with one side surface of the base end portion of the horizontal lock portion 331 so as to be adjacent thereto. Further, the flip-up lock portion 332 is longer than the horizontal lock portion 331, and the tip portion thereof can engage with the second locking portion 302a. When the top plate 2 is in the flip-up posture (F), the lock pawl drive shaft 333 has an upper end surface 303a of the head body 303 and the pawl receiver 301, as compared with the top plate 2 in the use posture (U). The upper end surfaces 301b and 302b of 302 are arranged at a position separated upward. The lock claw 33 is urged to rotate by the coil spring 38 in the direction of the claw receivers 301 and 302 of the shaft plate 31. In the use posture (U), the horizontal lock portion 331 of the lock pawl 33 engages with the first locking portion 301a of the first pawl receiver 301. On the other hand, in the flip-up posture (F), the flip-up lock portion 332 engages with the second locking portion 302a of the second pawl receiver 302. In addition, in FIG. 5, FIG. 10, FIG. 11, etc., the tip of the flip-up lock portion 332 is located at the end of the second engaging portion 302a so that the shape of the second engaging portion 302a can be clearly seen. Although it is shown in a slightly disengaged state, in the actual flip-up posture (F), the tip end of the flip-up lock portion 332 falls into the second locking portion 302a and engages with it. Here, the thickness dimension of the horizontal lock portion 331 and the width dimension of the first claw receiver 301 are set to be substantially the same. Further, the thickness dimension of the flip-up lock portion 332 and the width dimension of the second claw receiver 302 are set to be substantially the same. A drive projection 339 is integrally provided at a position of the lock pawl 33 which is eccentric from the lock pawl drive shaft 333. The drive projection 339 is adapted to receive the transmission of the operation force from the operation lever 37 for unlocking operation via the advancing / retreating member 39. 5 to 7 and 10 to 14, the lock claw 33 is provided with a pattern.

  The operation lever 37 is a plate-like member that is installed between the side plates 322 and 323 at one longitudinal end of the top plate receiver 32, that is, at the front end, and a bearing portion that allows the shaft 370 to be rotatably inserted at the base end. In addition to having 371, a finger hook portion 372 is provided at the tip edge. Both ends of the shaft 370 are supported by the side walls 322 and 323 of the top plate receiver 32 so as not to be pulled out. The operation lever 37 is supported by the shaft 370, and a non-operation position (N) that closes the lower surface of the front end portion of the top plate receiver 32 and an operation position (M) that the operation end side is separated from the top plate receiver 32. It can rotate between and. A torsion coil spring (not shown) is attached to the shaft 370 as a biasing element for self-returning the operation lever 37 to the non-operation position (N). The operation lever 37 is connected to the drive projection 339 of the lock claw 33 via the advancing / retreating member 39.

The advancing / retreating member 39 connects the operation lever 37 and the lock claw 33, and has a linear member main body 391 and a bent portion 392 that is bent outward from the base end of the member main body 391. And a folded-back portion 393 provided so as to be folded back to the tip portion of the member body 391, that is, the end portion on the lock claw 33 side . Then, the bent portion 392 is pivotally attached to the eccentric position of the operation lever 37, and the drive protrusion 339 of the lock claw 33 is slid into a slit 394 formed between the member main body 391 and the folded portion 393. I am involved as much as possible. The bent portion 392 is axially attached to a portion near the base end of the operation lever 37 in a posture in which the bent portion 392 is parallel to the shaft 370. The relationship among the advancing / retreating member 39, the operating lever 37, and the lock claw 33 is set as follows. First, when the locking pawl 33 in a state where the operation lever 37 is held in a non-operating position (N) is in the initial position (S), the precursor drive projection 339 of the slit 394 of the reciprocating members 39 The drive protrusion 339 is located near an end opposite to the operation lever 37, that is, near the rear end 394a, and is rotated when the operation lever 37 is rotated from the non-operation position (N) to the operation position (M). Is abutted against the inner end 394a of the slit 394 and is biased, and the lock claw 33 is rotated toward the unlocked position (R). On the other hand, when the lock claw 33 is rotated from the initial position (S) toward the unlock position (R) while the operation lever 37 is held at the non-operation position (N), the lock claw 33 The dimensions of each part are set so that the drive projection 339 of 33 loosens in the slit 394 and the rotational force of the lock claw 33 is not transmitted to the operation lever 37.

  The top plate support mechanism 3A includes a first front cover 34 and a second front face provided on the top plate receiver 32 so as to close the space formed between the shaft plate 31 and the top plate receiver 32. A cover 35 and a side cover 36 are provided.

  The first front cover 34 is a plate-shaped member that is provided adjacent to the rear side of the operation lever 37 and between the side plates 322 and 323 of the top plate receiver 32. The first front cover 34 is in the form of a strip that closes the space formed between the side plates 322 and 323 of the top plate receiver 32 from the front side. A recess 34a for facilitating the operation is provided, and elastic claws 341 that are elastically engaged with the engagement recesses 327 provided on the side plates 322, 323 of the top plate receiver 32 are provided on both side edges thereof. There is. A bearing portion 342 for pivotally supporting the second front cover 35 is provided at the rear end of the first front cover 34. The first front cover 34 is omitted in FIGS. 3, 5, and 12.

  The second front cover 35 is located in the vicinity of the center of the top plate receiver 32 in the longitudinal direction, and has a strip 351 at the base end for pivotally supporting the bearing portion 342 of the first front cover 34. It is a member. The second front cover 35 is configured to close the space formed between the shaft plate 31 and the top plate receiver 32 from the front side when the top plate 2 is in the flip-up posture (F). Further, the second front cover 35 is configured to hang down from the bearing portion 342 of the first front cover 34 by its own weight when the top plate 2 is in the use posture (U). The second front cover 35 is omitted in FIGS. 3, 5, and 12.

  The side cover 36 is disposed between the both side plates 322 and 323 of the top plate receiver 32, and closes a space formed between the shaft plate 31 and the top plate receiver 32 from the side surface. More specifically, the side cover 36 is attached to the inner surfaces of the side plates 322 and 323 of the top plate receiver 32, covers the lateral sides of the space in the flip-up posture (F), and in the use posture (U). It is configured so that it can be immersed in the top plate receiver 32. The side cover 36 has a base end portion rotatably supported around the support shaft 313, and a retracted position (B) accommodated in the top plate receiver 32 and a protruding position that laterally closes the space. It can rotate with (T). Specifically, a boss portion 315 is formed on an opening end surface of a shaft hole 314 for inserting the support shaft 331 of the shaft plate 31, and a boss receiving hole 36 a formed at a base end portion of the side cover 36. Is rotatably fitted onto the boss portion 315. The side surface cover 36 has a left and right side surface cover main body 361 and a connecting piece 362 that connects the left and right side surface cover main bodies 361 to each other, and has a U-shaped cross section. It should be noted that the shaft plate 31 is provided with a pin 319 for restricting rotation of the side cover 36 in a direction away from the top plate 2 when the top plate 2 is in the flip-up posture (F). ing.

  As shown in FIGS. 2, 4, and 9 to 11, the right top plate support mechanism 3B has a left-right symmetrical shape with the left top plate support mechanism 3A described above, and is the same or corresponding. The same reference numerals are given to the parts and the description thereof will be omitted.

<Connecting beam>
As shown in FIGS. 3 and 9, the connecting beam 4 includes a beam main body 41 formed by cutting a pipe material having a circular cross section into a predetermined length, and a female screw that is rigidly connected to both ends of the beam main body 41. And a fixed nut plate (not shown) having a hole. Then, the mechanical beam 5 is configured by connecting the left and right top plate support mechanisms 3A and 3B with each other by the connecting beam 4. That is, as shown in FIGS. 6, 7, 13 and 14, the left and right shaft plates 31 are screwed into the fixed nut plates of the connecting beams 4 by screwing bolts 42 penetrating the left and right shaft plates 31 from the outside. The shaft plates 31 of the top plate support mechanisms 3A and 3B are connected to each other.

<Mechanical unit>
As shown in FIGS. 3 and 9, the mechanical unit 5 includes a pair of left and right top plate support mechanisms 3A and 3B, and the connecting beam that connects the shaft plates 31 of the top plate support mechanisms 3A and 3B to each other. 4 and an operation interlocking beam 511 for connecting the lock claw drive shafts 333, 333 of the top plate supporting mechanisms 3A, 3B.

  By operating any one of the operating levers 37 provided on the left and right top plate supporting mechanisms 3A and 3B from the non-operating position (N) to the operating position (M), the locked state by the lock claw 33 is released. The posture of the top plate 2 can be changed.

  More specifically, this mechanical unit 5 is provided to either the pawl interlocking mechanism 51 that interlocks the lock pawls 33 of the left and right top plate support mechanisms 3A and 3B in synchronization in both forward and reverse directions, and the operating lever 37. The operating force transmitted to the lock pawl 33 but the movement of the lock pawl 33 is not transmitted to the other operating lever 37, and the operating lever 37 is set to the non-operating position. The screw recoil spring (not shown) as an urging element for self-returning to.

  The pawl interlocking mechanism 51 includes the lock pawl drive shaft 333 provided on each lock pawl 33 and the operation interlocking beam 511 that connects the lock pawl drive shafts 333 to each other in a synchronously rotatable manner. ..

  The operating force transmission mechanism 52 advances and retreats in response to the movement of the operating lever 37 from the non-operating position (S) to the operating position (R), and the advancing and retracting member 39 and the lock claw 33. And a one-way engaging portion 521 for transmitting only one-directional movement of the advancing / retreating member 39 to the lock claw 33. Specifically, the one-way engaging portion 521 is provided between the member main body 391 and the folded-back portion 393 at the tip end portion of the advancing / retreating member 39, and the slit 394 having the closed rear end 394a is closed, and the lock claw 33. And a drive protrusion 339 movably engaged with the slit 394.

  Here, the operation lever 37, the advancing / retreating member 39, the lock claw 33, and the lock claw drive shaft 333 are provided on the left and right top plate support mechanisms 3A and 3B, respectively, as described above. The operation interlocking beam 51 is arranged between the left and right top plate receivers 32 so as to integrally rotatably connect the lock claw drive shafts 333 provided on the left and right top plate support mechanisms 3A, 3B.

  Next, the operation of the furniture with the flap top plate will be described.

  First, as shown in FIGS. 3 to 11, when the top plate 2 is in the flip-up posture (F), the tip of the flip-up lock portion 332 of the lock pawl 33 is the second locking portion 302a of the shaft plate 31. And the top plate 2 is prohibited from tilting forward. In addition, in the illustrated example, in order to clearly show the shape of the second engaging portion 302a and the like, the top plate 2 is shown in a state in which it is erected in a completely vertical position slightly beyond the normal flip-up posture (F). Actually, the tip of the flip-up lock portion 332 of the lock claw 33 is engaged with the second locking portion 302a in the flip-up posture (F) in which the top plate 2 is slightly tilted forward from the illustrated position. .. When the operating lever 37 provided on either the left or right top plate supporting mechanism 3A, 3B is rotated forward from this flip-up posture (F), the lock claw 33 corresponding to the operating lever 37 is moved to the initial position (S). To the unlock position (R). Then, when one of the lock claws 33 rotates, the turning power is transmitted to the other lock claw 33 via the operation interlocking beam 51, and the other lock claw 33 also moves from the initial position (S) to the unlocked position (R). Rotate to. When both lock claws 33 rotate in the unlocked position (R) direction, the flip-up lock parts 332 of these lock claws 33 are disengaged from the second locking part 302a, and the locked state of the top plate 2 is released. It Therefore, the top plate 2 can be rotated from the flip-up position (F) to the use position (U). When the top plate 2 reaches the use position (U) in a state where the operation lever 37 is stopped, the horizontal lock portion 331 of the lock claw 33, which is biased by the coil spring 38, causes the first lock portion 331 of the shaft plate 31 to move. The top plate 2 is locked in the use position (U) by fitting in the stopper 301a. Even when the operation of the operation lever 37 is stopped in the middle of reaching the use position (U) from the flip-up position (F), the flip-up lock portion 332 of the arm-like lock claw 33 has the shaft plate 31. Since it moves while being guided by the front end portion of the second pawl receiver 302, the lock pawl 33 can reach the use posture (U) in an appropriate posture without completely returning to the initial position (S). When any one of the operating levers 37 is rotated downward in the use posture (U), the horizontal lock portions 331 of both the lock claws 33 are disengaged from the first locking portions 301a, and the horizontal lock portions 331 are attached to the top plate 2. The locked state is released.

  As described above, by operating either the left or right operation lever 37, the locked state of the left and right top plate support mechanisms 3A, 3B can be controlled. In this embodiment, FIGS. As shown in FIG. 5, when the lock state is controlled by operating one of the left and right operation levers 37, the other operation lever 37 does not operate and is held at the non-operation position (N). That is, when the operating lever 37 of the left top plate supporting mechanism 3A is operated from the locked state shown in FIG. 17, the left and right lock claws 33 interlock and move to the unlock position (R) to lock. However, the operation lever 37 of the right top plate supporting mechanism 3B does not operate and is held in the non-operation position (N). More specifically, when the operation lever 37 of the left top plate support mechanism 3A is operated, both the left and right lock claws 33 rotate in the unlocked position direction. Due to the presence of the portion 521, it is not transmitted to the operation lever 37 of the right top plate supporting mechanism 3B. Further, the operating lever 37 of the right top plate supporting mechanism 3B is biased toward the non-operating position (N) by the biasing mechanism. Therefore, the operation lever 37 of the right top plate support mechanism 3B does not operate and is held at the non-operation position (N). When the operation lever 37 of the right top plate support mechanism 3B is operated from the locked state shown in FIG. 18 as shown in FIG. 18, the operation lever 37 of the left top plate support mechanism 3A does not operate by the same mechanism. It is held in the non-operating position (N).

  With such a configuration, the operation force applied to one of the operation levers 37 of the left and right top plate supporting mechanisms 3A, 3B and transmitted to the lock claw 33 is transmitted to the other operation lever 37. However, since the other operating lever 37 is held at the non-operating position (N) while being biased toward the non-operating position (N) by the biasing mechanism, the other operating lever 37 operates. There is nothing to do. That is, when an operating force is applied to one operating lever 37, the other operating lever 37 does not abruptly move and does not give a feeling of strangeness.

  Further, according to the configuration of this embodiment, the following configuration can be obtained. That is, the operation lever 37 is pivotally attached to the front end portion of the top plate receiver 32, and the non-operation position (N) that closes the lower surface of the front end portion of the top plate receiver 32 and the operation end side of the top plate receiver 32. Since it can rotate between the operation position (M) separated from 32, the operation lever 37 is moved to the space inside the top plate receiver 32 especially when the operation lever 37 is in the non-operation position (N). It can also function as a cover for covering.

  By the drive shaft 333 provided on each lock claw 33 and the operation interlocking beam 511 connecting the drive shafts 333 to each other in a synchronously rotatable manner, the lock claws 33 of the left and right top plate support mechanisms 3A and 3B can be moved in both forward and reverse directions. The pawl interlocking mechanism 51 that is interlocked with and can be realized by a simple mechanism.

  It comprises a slit 394 located at the tip of the advancing / retreating member 39 and having a closed rear end 394a, and a drive protrusion 339 provided in the lock claw 33 and movably engaged with the slit 394. Due to the operation force applied to the lever 37, the drive projection 339 contacts the back end 394a only when the advancing / retreating member 39 is actuated in the direction from the initial position (S) of the lock claw 33 to the unlock position (R). Since the operation force is transmitted to the lock claw 33, the drive projection 339 of the lock claw 33 on the side to which the operation force is not applied floats inside the slit 394, and the corresponding advancing / retreating member 39. It is possible to easily realize a configuration in which the driving force is not transmitted to.

The advancing / retreating member 39 includes a member main body 391 that advances and retreats in the longitudinal direction by an operating force applied to the operation lever 37, and a folding-back portion 392 provided so as to be folded back at the tip of the member main body 391. By forming the slit 394 between the member main body 391 and the folded-back portion 392, the advancing / retreating member 39 for obtaining the above-described configuration can be easily configured.

  The present invention is not limited to the embodiment described above.

  For example, the configuration of the top support mechanism is not limited to that according to the above-described embodiment.

  Further, like the above-described embodiment, the operation lever is pivotally attached to the front end portion of the top plate receiver and closes the lower surface of the front end portion of the top plate receiver, and the operation end side is the top plate receiver. In addition to the one that can be rotated between an operation position that is separated from the operation position, for example, between a non-operation position that closes the lower surface of the front end of the top receiver and an operation position that is separated rearward from this non-operation position. Anything that closes the lower surface of the front end of the table top in the non-operating position, such as an operation lever that can be slid, can be mounted at the front end of the table top in the non-operating position. The operating lever can function as a cover that covers the space inside the plate receiver.

  The biasing element for self-returning the operation lever to the non-operation position may be any one as long as it biases the operation lever to which the operation force is not applied toward the non-operation position. May be. For example, other than the one using the screw recoil spring like the one according to the above-described embodiment, the operation lever is self-returned to the non-operation position by using gravity when the operation lever is not acted from the outside. It is conceivable that something to do.

  Any pawl interlocking mechanism that interlocks the lock pawls of the top plate support mechanism in both forward and reverse directions in synchronization may be used. For example, in addition to the one using an operation interlocking beam that connects the lock claw drive shafts provided to the respective lock claws so as to be rotatable synchronously, one using a link mechanism or a pair of gears can be considered.

  The operation force transmission mechanism is not limited to the one having the advancing / retreating member and the one-way engaging portion like the one according to the above-described embodiment, and for example, the operation force is applied such as one using a one-way clutch. Any configuration may be adopted as long as the operation force is not transmitted to the operation lever other than the lever.

  The one-way engaging portion is not limited to the one according to the above-described embodiment, and any configuration may be adopted as long as it transmits only the one-way movement of the advancing / retreating member to the lock claw.

  Further, the advancing / retreating member is also a plate-like member having a notch that opens in one direction, in addition to the one in which a slit is formed between the folded-back portion and the member main body provided so as to be folded back at the tip of the member main body. Other configurations such as those using members may be adopted.

  In addition, various modifications may be made without departing from the spirit of the present invention.

1A, 1B ... Legs 2 ... Top plate 3A, 3B ... Top plate support mechanism 33 ... Lock claw 36 ... Side cover 37 ... Operating lever 51 ... Claw interlocking mechanism 52 ... Operating force transmission mechanism (U) ... Use posture (F) … Bouncing posture (N)… Non-operating position (M)… Operating position

Claims (6)

The top plate is supported via a plurality of top plate support mechanisms that have lock claws on the legs so that the top plate can be locked in either the use position or the flip-up position. It is a furniture with a flap top plate that is capable of changing the posture of the top plate by releasing the locked state by the lock claw by operating from the operation position to the operation position,
The claw interlocking mechanism that synchronizes the lock claws of all the top plate support mechanisms in both the forward and reverse directions and the operation force applied to any of the operation levers is transmitted to the lock claws. An operation force transmission mechanism configured to prevent movement from being transmitted to another operation lever, and a biasing element for causing the operation lever to self-return to the non-operation position ,
Each of the top support mechanisms includes a top receiver that supports the top,
The operation lever is pivotally attached to the front end portion of the top plate receiver, and a non-operation position for closing the lower surface of the front end portion of the top plate receiver and an operation position where the operation end side is separated from the top plate receiver. Furniture with a flap top that can be rotated between . Each of the top plate support mechanisms is pivotally supported by a shaft plate attached to the leg body and having a first locking portion and a second locking portion, and a pivot shaft rotatably supported by the shaft plate. and the top plate receiving for supporting the top plate, use position of the top plate with each other regardless selectively to the first engagement portion and the second engaging portion of the shaft plate is provided in the receiving the top plate or The furniture with a flap top plate according to claim 1, further comprising: the lock claw that holds the flip-up posture. Said pawl interlocking mechanism, and the lock claw drive shaft provided in each lock pawl, according to claim 1 or 2, wherein is obtained by an operation interlock beam connecting the locking pawl drive axes synchronously rotatable Furniture with flap top plate. The operating force transmission mechanism is provided with an advancing / retreating member that moves forward / backward in response to a movement of the operating lever from a non-operating position to an operating position, and a forward / backward member provided between the advancing / retreating member and the lock claw in The furniture with a flap top plate according to claim 1, 2 or 3 , further comprising a one-way engaging portion that transmits only the movement to the lock claw . The one-way engaging portion is provided on the lock claw, and a slit in which the one end of the advancing and retracting member that connects the operation lever and the lock claw is located at the lock claw side end and the end opposite to the operation lever is closed. And a drive projection engaged with the slit so as to be movable, and the drive projection is the operation lever of the advance / retreat member only when the advance / retreat member is actuated in one direction by an operation force applied to the operation lever. The furniture with a flap top plate according to claim 4, wherein the furniture comes into contact with an end on the opposite side to transmit the operation force to the lock claw . The advancing / retreating member includes a member main body that advances and retreats in the longitudinal direction by an operating force applied to the operation lever, and a folding-back portion that is provided so as to be folded back at a tip end portion of the member main body. The flap-top furniture according to claim 5 , wherein the slit is formed between the folded-back portion .

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