JP2020103708A - Folding table - Google Patents

Abstract

To improve convenience of a folding table at the time of stacking storage.SOLUTION: A folding table 100 is formed to be turnable between an almost horizontal use attitude 1C, and a standing first or second storage attitude 1A or 1B by supporting a top plate 1 on a leg body 3 via a turning shaft 2 extending horizontally left and right. The top plate 1 in the use attitude 1C is turnably supported between the first storage attitude 1A of turning in a forward or backward first turning direction RA, and the second storage attitude 1B of turning in a second turning direction RB reverse to the first turning direction RA. The folding table 100 includes a first lock mechanism 4A of regulating turn of the top plate 1 in the use attitude 1C in the first turning direction RA, and a second lock mechanism 4B of regulating turn in the second turning direction RB.SELECTED DRAWING: Figure 3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding table in which a top plate is supported by legs through a horizontally extending rotary shaft and is rotatable between a substantially horizontal use posture and a standing storage posture.

Conventionally, various types of folding tables have been proposed in which a top plate is configured to be rotatable between a substantially horizontal use posture and a standing storage posture (see, for example, Patent Document 1). This type of folding table is used, for example, in meetings in offices and schools, and a plurality of tables are arranged during use, while at the time of storage, the tabletop of each table is flipped up to a storage posture, By stacking (fitting) multiple tables back and forth, the table storage space can be reduced. In addition, a technique has been proposed in which a large table used in a conference or a dining room is configured to be foldable (see, for example, Patent Document 2).

JP, 2009-39456, A JP, 2017-80226, A

When stacking a plurality of folding tables back and forth, usually, the top surfaces of the tops of the tables in the storage positions are oriented in the same direction in the front and back. However, in the conventional folding table, since the direction in which the tabletop can be flipped up and rotated is determined, one of the tables is rotated 180 degrees horizontally in order to align the tabletops of a plurality of tables. Sometimes there was a need.

For example, if the space around the storage position for stacking multiple tables is narrow and it is difficult to rotate the table horizontally near the storage position, the tabletop was moved to the storage position in the wrong orientation. It is necessary to move the table to a place where it can be horizontally rotated, and then horizontally rotate the table so that the top plate of the table is aligned with another table.

As described above, the conventional folding table has room for improvement in that it requires a large amount of labor and time to align the direction of the top plate when stacking. Such a problem is particularly remarkable in a folding table having a large top plate.

The present invention has been made to improve the present situation.

The present invention is a foldable table in which a top plate is supported by legs through a horizontally extending rotary shaft and is rotatable between a substantially horizontal use posture and a standing storage posture. A first storage posture in which the top plate in the use posture is rotated in a first rotation direction that is forward or rearward, and a first rotation posture that is rotated in a second rotation direction that is opposite to the first rotation direction. A first lock mechanism that rotatably supports between two storage postures, and that regulates rotation of the top plate in the use posture in the first rotation direction; and a first lock mechanism in the second rotation direction. And a second lock mechanism for restricting the rotation of the.

According to the folding table of the present invention, the top plate is rotated in the first storage position in which the top plate is rotated in the first rotation direction from the use position, and in the second rotation direction opposite to the first rotation direction. Since it is rotatably supported between the second storage posture and the second storage posture, the direction of the top plate in the storage posture can be changed by rotating the top plate without horizontally rotating the table itself. For example, even if the top of the table moved near the stacking storage position is in the opposite direction in the front and rear, the top can be rotated by rotating the top without horizontally rotating the table itself. Can be adapted to other tables. As a result, the labor of the user and the working time at the time of stacking and storing can be reduced, and the convenience of the table is improved. The table can be moved to the stacking storage position near the stacking storage position without worrying about the orientation of the storage table, and the table can be turned upside down while moving the table to the stacking storage position. Since it does not need to be rotated horizontally, accidents such as the table falling can be reduced. INDUSTRIAL APPLICABILITY The folding table of the present invention is particularly effective for a folding table provided with a large top plate that requires a large space and labor when horizontally rotating.

In the folding table of the present invention, when the first lock mechanism is released, the second lock mechanism in the locked state causes the rotatable range of the top plate to fall between the use posture and the first storage posture. When the second lock mechanism is released, while the first lock mechanism in the locked state limits the rotatable range of the top plate between the use posture and the second storage posture. You may make it limit to the range.

According to such an aspect, the rotatable range of the top plate when the first or second lock mechanism is released is limited, so that the user releases the first or second lock mechanism. Rotation of the top plate in an unintended direction at the time (for example, when the first lock mechanism is released while the top plate is in the use posture, the top plate rotates in the second rotation direction (second storage posture side)). (Movement etc.) can be prevented, and safety and operability can be improved when the posture of the top is changed.

Further, in the folding table of the present invention, the top plate in the first or second storage posture may be restricted from being rotated by the first and second lock mechanisms in a locked state.

According to such an aspect, it is not necessary to separately provide a dedicated lock mechanism for holding the top plate in the first and second storage postures, and therefore an increase in manufacturing cost due to the provision of the dedicated lock mechanism can be suppressed. At the same time, it is possible to prevent the unlocking operation from becoming complicated due to an increase in the number of lock mechanisms.

Another aspect of the present invention is a foldable table in which a top plate is supported by legs via a horizontally extending rotary shaft and is rotatable between a substantially horizontal use posture and a standing storage posture. In addition, a first storage posture in which the top plate in the use posture is rotated in a forward or backward first rotation direction and a second rotation direction in a direction opposite to the first rotation direction. A lock mechanism that rotatably supports the top plate in the rotated second storage position and that holds the top plate in the use position, the first storage position, and the second storage position is provided. The operation tools of the lock mechanism are provided on the lower surface with the axis of the rotating shaft interposed therebetween.

According to the folding table of another aspect of the present invention, since the operation tools of the lock mechanism are provided on the lower surface of the top plate so as to sandwich the axis line of the rotary shaft extending horizontally in the left and right, respectively. The lock mechanism can be released from either one side edge or the other side edge of the top plate sandwiching the lock mechanism. With this, when the posture of the top plate in the use posture is changed to the first or second storage posture, the user turns from one side edge side or the other side edge side of the top plate to the other side edge side. The time and effort of moving around can be omitted, and the convenience of the table is improved.

INDUSTRIAL APPLICABILITY The folding table according to the present invention can improve convenience during stacking storage.

It is a perspective view which shows the schematic structure of the whole folding table, (A) is a use posture, (B) shows a 1st accommodation posture. It is a front view of the table in a first storage posture. It is a side view which shows the use posture of a top plate by a solid line, and shows a storage posture by a virtual line. It is a side view which shows an example of the stacking state of the table. FIG. 6 is a plan view showing a top plate support part partially broken away. It is a perspective view showing a lock mechanism inside the top board support part. It is an exploded perspective view of the same top plate support part. FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5, where (A) shows a locked state and (B) shows a state where the first locking mechanism is released. It is sectional drawing corresponding to the AA position of FIG. 5, (A) shows an intermediate posture, (B) shows a 1st accommodation posture.

Next, an embodiment of the present invention will be described with reference to the drawings. In this specification, for the sake of convenience, front and rear and left and right words are used to specify a direction, but in the front and rear and left and right directions, the direction in which the pair of legs 3 and 3 is arranged is the left and right direction, and in the horizontal plane. The direction orthogonal to the left-right direction is the front-back direction.

FIG. 1 is a perspective view showing a schematic configuration of the entire folding table, where (A) shows a use posture and (B) shows a first storage posture. FIG. 2 is a front view of the folding table in the first storage posture. FIG. 3 is a side view showing the use posture of the top plate by a solid line and the storage posture by an imaginary line.

As shown in FIGS. 1 to 3, in the folding table 100 of the present embodiment, the top plate 1 is supported by the legs 3 and 3 via a rotary shaft 2 that extends horizontally in the left and right directions. The top plate 1 has a substantially horizontal use posture 1C (see solid line positions in FIGS. 1A and 3) and storage postures 1A and 1B standing substantially vertically (see FIGS. 1B, 2 and 3). It is configured to be rotatable with respect to a virtual line position).

As shown in FIG. 3, in the table 100, the first storage posture 1A in which the top plate 1 in the use posture 1C is rotated in the forward or backward first rotation direction RA and the first rotation direction RA are shown. It is rotatably supported with respect to the second storage posture 1B which is rotated in the opposite second rotation direction RB.

Further, the table 100 includes a first lock mechanism 4A for restricting rotation of the top plate 1 in the use posture 1C in the first rotation direction RA and a second lock mechanism 4A for restricting rotation in the second rotation direction RB. And a lock mechanism 4B. The lock mechanism 4 including the first and second lock mechanisms 4A and 4B is configured to hold the top plate 1 in the use posture 1C, the first storage posture 1A, or the second storage posture 1B.

As shown in FIG. 1, the top plate 1 has a substantially rectangular shape in a plan view having a longitudinal direction in the left-right direction. Of the one side edge portion 1a and the other side edge portion 1b sandwiching the axis 2X of the rotating shaft 2, the edge portion located below when the top plate 1 is in the first storage posture 1A is one side edge. The portion 1a is formed, and the edge portion located above is formed as the other side edge portion 1b.

As shown in FIG. 4, the table 100 is stackable in the front and rear directions with the top surface of the top plate 1 oriented in the same direction in the first storage posture 1A or the second storage posture 1B. Note that, in FIG. 4, the two tables 100, 100 in the first storage posture 1A and the one table 100 in the second storage posture 1B are stacked, but the stacking state shown in FIG. 4 is an example. The storage attitude of the table 100 during stacking can be changed to the first storage attitude 1A or the second storage attitude 1B as appropriate.

Further, as will be described later in detail, the top plate 1 has left and right top plate supporting portions 5 and 5 each provided with a lock mechanism 4, on the lower surface thereof. Then, as shown in FIGS. 2 and 7, the table 100 is stacked and housed on the outer surface of the lower cover member 61 of each top plate support portion 5 (a part of the top plate support portion 5 that is farthest from the top plate 1). A cushioning member 62 such as a plate rubber is provided to prevent the top plate supporting portion 5 from damaging the top plate 1 of the other table 100 when the above is performed.

Next, each part of the table 100 will be described with reference to FIGS. FIG. 5 is a plan view showing the top plate supporting portion 5 partially broken away. FIG. 6 is a perspective view showing a lock mechanism inside the top support portion. FIG. 7 is an exploded perspective view of the top plate support portion. FIG. 8 is a cross-sectional view taken along the line AA of FIG. 5, where (A) shows a locked state and (B) shows a state in which the first locking mechanism is released.

As shown in FIGS. 1 to 5, the leg body 3 has a substantially inverted T-shape having a cylindrical leg column 7 extending upward from a longitudinal center portion of a leg base 6 extending in the front-rear direction. Casters 8 are provided at both front and rear ends of the lower surface of the leg base 6. At the front and rear ends of the upper surface of the leg base 6, caster operating portions 8a, 8a for operating locking and unlocking of the casters 8 are provided, respectively. Each caster operating unit 8a is, for example, a push button type or a switch lever type. The leg base 6 is provided with an interlocking mechanism (not shown) that switches both front and rear casters 8 and 8 to a locked state or an unlocked state by operating one of the front and rear caster operating portions 8a. Accordingly, when switching the lock state of the casters 8, the user can perform the lock state switching operation of both the front and rear casters 8 from either the front side or the rear side of the top plate 1. Therefore, the user can save the trouble of moving around the top plate 1 from the front side to the rear side of the top plate 1 or from the rear side to the front side in order to switch the lock state of both the front and rear casters 8, 8. The convenience of is improved.

Leg connecting fittings 9 that are substantially U-shaped in a plan view and that extend in the up-down direction are fixed to left and right inward portions of the upper ends of the leg columns 7. Then, the leg connecting fittings 9, 9 of the left and right leg bodies 3, 3 are connected by a cylindrical connecting pipe 11 via the left and right leg connecting members 10 to be integrated. Although the details will be described later, the leg connecting member 10 and the connecting pipe 11 also serve as the rotating shaft 2 of the top plate 1.

The left and right top plate support portions 5 are rotatably supported by both ends of the rotary shaft 2 and fixed to the lower surface of the top plate 1 near the left and right end portions. The left and right top plate support portions 5 have a bilaterally symmetrical shape. A metal upper arm 12 that constitutes the main body of the top plate supporting portion 5 is attached to the lower surface of the top plate 1 with a mounting screw (not shown).

As shown in FIG. 7, the upper arm 12 includes a plate-shaped top surface portion 13 that is attached to the bottom surface of the top plate 1 and is long in the front-rear direction, and side surface portions 14 and 14 that extend downward from both left and right edges of the top surface portion 13. Has a substantially U-shaped cross section and has a hollow interior. The side surface portion 14 has a substantially convex shape in a side view in which the central portion in the longitudinal direction projects in the opposite direction to the top surface portion 13. A lock mechanism 4 having first and second lock mechanisms 4A and 4B, and operating tools 15 and 15 for operating the lock mechanism 4 are arranged between both side surface portions 14 of the upper arm 12.

As shown in FIG. 3, the first lock mechanism 4A and the second lock mechanism 4B are arranged so as to sandwich the axis line 2X of the rotary shaft 2. In the present embodiment, the first lock mechanism 4A is arranged on the other side edge 1b side of the top plate 1 with respect to the axis 2X, and the second lock mechanism 4B is arranged on the one side edge 1a side with respect to the axis 2X. ing.

As shown in FIGS. 5 to 8, the first lock mechanism 4</b>A and the second lock mechanism 4</b>B are configured substantially in line symmetry with the axis line 2</b>X of the rotary shaft 2 interposed therebetween. The first and second lock mechanisms 4A and 4B share the top plate fixing metal fitting 16 fixed to the end portion of the connecting pipe 11, while being provided with a lock metal fitting 17, a support shaft 18, a lock pin 19, and the like, respectively.

The rotating shaft 2 (the leg connecting member 10 and the connecting pipe 11) is non-rotatably attached to the leg body 3, and the top plate fixing member 16 is non-rotatably fixed to the rotating shaft 2. That is, the top plate fixing member 16 is provided so as not to rotate with respect to the leg body 3. The top plate fixing member 16 has a lower engaging portion 21, an intermediate engaging portion 22, and an upper engaging portion 23 on each of the front and rear sides, and has a front-rear symmetrical shape in a side view. ..

With respect to each of the first lock mechanism 4A and the second lock mechanism 4B, the middle portion of the lock fitting 17 is rotated up and down by the support shaft 18 provided in the support holes 30, 30 provided in the both side surface portions 14, 14 of the upper arm 12. While being movably provided, the top plate 1 is engaged with the lower engaging portion 21, the intermediate engaging portion 22 or the upper engaging portion 23 of the top plate fixing member 16 to use the top plate 1 in the use posture 1C, the intermediate posture or the storage posture 1A, The lock pin 19 maintained at 1B is loosely inserted into the long holes 24, 24 formed in both side surface portions 14, 14 of the upper arm 12 so as to be guided to the engaging position, and the length formed at the tip of the lock fitting 17 is also increased. The lock pin 19 is inserted into the locking portion 29 formed of a hole, and the lock fitting 17 is biased by the elastic biasing member 25 in the direction in which the lock pin 19 is engaged with the lower engaging portion 21 or the upper engaging portion 23. Then, based on the operation of the operation tool 15, the lock fitting 17 is rotated around the support shaft 18 to retract the lock pin 19 along the elongated holes 24, 24, and the lower side engaging portion 21 and the intermediate engaging portion 22. Alternatively, the engagement with the upper engagement portion 23 can be released. That is, in the use posture 1C and the storage postures 1A and 1B, the lock pin 19 is automatically guided by the elongated holes 24 and 24 by the urging force of the elastic urging member 25, and the lower engaging portion of the top plate fixing bracket 16 is automatically operated. 21, the intermediate engaging portion 22 or the upper engaging portion 23 is engaged and locked.

As shown in FIG. 8A, when the top plate 1 is in the use posture 1C, the lock pin 19 of the first lock mechanism 4A is engaged with one of the lower engaging portions 21 of the top plate fixing bracket 16. The rotation of the top plate 1 in the first rotation direction RA is restricted by and the lock pin 19 of the second lock mechanism 4B is engaged with the other lower engaging part 21 of the top plate 1. The rotation in the rotation direction RB is restricted. As a result, the top plate 1 is restricted from rotating in both the first and second rotation directions RA and RB, and the use posture 1C is maintained.

As shown in FIG. 8B, in order to bring the top plate 1 in the use posture 1C into the first storage posture 1A (see FIG. 9B), the first lock mechanism 4A side (the other side of the top plate 1) When the operation tool 15 on the edge portion 1b side) is operated downward, the lock pin 19 of the first lock mechanism 4A is displaced in the direction away from the top plate fixing bracket 16, and is disengaged from the lower engagement portion 21. The lock mechanism 4A is released. The front and rear lower engaging portions 21 and 21 of the top plate fixing member 16 are connected in the circumferential direction of the rotary shaft 2, and the second lock mechanism 4B in the locked state is the second rotary direction of the top plate 1. The rotation in the RB is regulated, but the rotation in the first rotation direction RA is not regulated. Therefore, when the first lock mechanism 4A is released while the top plate 1 is in the use posture 1C, the top plate 1 is in a state of being rotatable in the first rotation direction RA.

As shown in FIG. 9(A), when the top plate 1 is rotated in the first rotation direction RA, both lock pins 19 of the first and second lock mechanisms 4A and 4B are also moved around the rotation shaft 2. It is displaced in one rotation direction RA, the lock pin 19 of the first lock mechanism 4A is fitted into the intermediate engaging portion 22, and the top plate 1 is maintained in the intermediate posture 1D inclined by about 45 degrees. At this time, the lock pin 19 of the second lock mechanism 4B is located at the intermediate position between the front and rear lower engagement portions 21 and 21, and the second lock mechanism 4B does not regulate the rotation of the top plate 1. .. As described above, when the top plate 1 is rotated from the use posture 1C to the first storage posture 1A, the rotation of the top plate 1 is temporarily stopped in the intermediate posture 1D, so that the top plate 1 is rapidly rotated. The movement is suppressed and the safety of the user is secured.

As shown in FIG. 9B, the first lock mechanism 4A is released to rotate the top plate 1 in the intermediate posture 1D in the first rotation direction RA, and the top plate 1 is erected substantially vertically. In the first storage attitude 1A, the lock pin 19 of the first lock mechanism 4A engages with the upper engagement portion 23, and the first lock mechanism 4A restricts the rotation of the top plate 1 in the second rotation direction RB. On the other hand, the lock pin 19 of the second lock mechanism 4B is engaged with the lower engagement portion 21 below the lock pin 19 of the first lock mechanism 4A, and the second lock mechanism 4B moves the top plate 1 in the first rotation direction. Restrict the rotation to RA. As a result, the rotation of the top plate 1 is restricted, and the first storage posture 1A is maintained.

When the posture of the top plate 1 is changed between the use posture 1C (see FIG. 8A) and the first storage posture 1A (see FIG. 9B), the user is required to use the other side edge portion 1b of the top plate 1. The first lock mechanism 4A is released by operating the operation tool 15 located on the side, and then the other side edge portion 1b of the top plate 1 is rotated upward or downward. At this time, the second lock mechanism 4B in the locked state limits the rotatable range of the top plate 1 to a range between the use posture 1C and the first storage posture 1A. Thereby, when the user releases the first lock mechanism 4A, the other side edge portion 1b of the top plate 1 in the use posture 1C is rotated downward or the other side of the top plate 1 in the first storage posture 1A. It is possible to prevent the edge portion 1b from rotating inward as viewed by the user, and improve safety and operability.

Further, the user operates the operation tool 15 on the second lock mechanism 4B side (the one side edge portion 1a side of the top plate 1) to release the second lock mechanism 4B and then the one side edge portion of the top plate 1. By rotating 1a upward or downward, the posture of the top plate 1 can be changed between the use posture 1C and the second storage posture 1B (see FIG. 3). At this time, since the first lock mechanism 4A in the locked state limits the rotatable range of the top plate 1 to the range between the use posture 1C and the second storage posture 1B, when the first lock mechanism 4A is released. In addition, the safety and operability are ensured as well as the second lock mechanism 4B limits the rotatable range of the top plate 1.

Further, in the present embodiment, the top plate 1 in the first or second storage posture 1A or 1B is restricted from rotating by the first and second lock mechanisms 4A and 4B in the locked state (maintained in the storage posture. Therefore, it is not necessary to separately provide a dedicated lock mechanism for holding the top plate 1 in the first and second storage postures 1A and 1B. As a result, it is possible to suppress an increase in manufacturing cost due to the provision of the dedicated lock mechanism, and it is possible to suppress the complexity of the unlocking operation due to the increase of the lock mechanism other than the first and second lock mechanisms 4A and 4B. ..

Details of the lock mechanism 4 will be described with reference to FIGS. 5 to 9. Each of the lock fittings 17 of the first and second lock mechanisms 4A, 4B has a pair of parallel lock pieces 26, 26 that are continuous at an intermediate portion, and each of the lock pieces 26, 26 has a long hole at the tip thereof. The locking portions 29, 29 are formed, and the top plate fixing member 16 is arranged between the lock pieces 26, 26 in a state of being mounted between the both side surface portions 14, 14 of the upper arm 12. Further, operating pieces 28, 28 for rotating the operating tool 15 are provided on the base end side of the shaft holes 27, 27 through which the support shafts 18 formed in the lock pieces 26, 26 of the lock fitting 17 are inserted. ing. The elastic biasing member 25 is composed of a kick spring, the coil portion 25a of the kick spring is inserted into the support shaft 18 on one side of the lock fitting 17, and one elastic piece 25b is brought into contact with the top surface portion 13 of the upper arm 12. The other elastic piece 25c bent like a crank is locked so as to straddle both lock pieces 26, 26 of the lock fitting 17.

Further, when the top plate 1 is in the use posture 1C, the intermediate posture 1D, or the storage postures 1A and 1B, the lower engaging portion 21, the intermediate engaging portion 22, or the upper engaging portion 23 of the top fixing member 16 is engaged. The elongated holes 24, 24 are formed in the direction along the edge so that the lock pin 19 can smoothly move to the engagement position during the lock operation and the lock release operation.

A circular bearing hole 31 is formed in the outer side surface portion 14 of the upper arm 12, and a U-shaped opening 32 is formed in the inner side surface portion 14 so as to be continuous with the upper portion of the U-shaped opening 32. The surface portion 13 is formed with a notch 33 through which the top plate fixing member 16 can be inserted. The lower semicircular portion of the U-shaped opening 32 is coaxial with the bearing hole 31. Then, a synthetic resin sliding ring 34 is fitted into the bearing hole 31 from the outside, and a synthetic resin sliding ring 34 is slidably fitted onto the lower portion of the U-shaped opening 32 and the notch 33. The closing member 35 is fitted from the outside, and the leg connecting member 10 rotatably fitted to the sliding ring 34 from the outside is connected to the end of the connecting pipe 11 in the upper arm 12 so as not to rotate. ing. Here, the U-shaped opening 32 can be opened downward. In that case, the notch 33 becomes unnecessary.

Here, the leg connecting member 10 is made of aluminum die casting and has a substantially L-shape in a front view, and the connecting portion 36 extending downward is bolted to the leg connecting metal fitting 9 on the upper portion of the leg body 3 so as to extend horizontally. A cylindrical shaft portion 38 has a stepped shape in 37, and the shaft portion 38 can be rotatably fitted to the sliding ring 34.

Further, the closing member 35 is made of synthetic resin divided into upper and lower halves, and the upper and lower closing members 35a and 35b are located in the U-shaped opening 32 of the upper arm 12, and the connecting pipe 11 is sandwiched from above and below. It is rotatably fitted to the U-shaped opening 32 and the notch 33.

As described above, the top plate 1 is rotatably provided around the rotary shaft 2 configured by the shaft portion 38 of the leg connecting member 10 and the connecting pipe 11. The rotation shaft 2 of the top plate 1 is not limited to the configuration in which the left and right legs 3 and 3 are connected to each other, and the rotation shaft 2 is provided to each of the left and right legs 3 and 3. Thus, the left and right rotating shafts 2 may be provided separately. In addition, in the present invention, any configuration may be used as long as the top plate is supported by the legs via a rotation shaft that extends horizontally in the horizontal direction.

As described above, the sliding ring 34 is fitted into the bearing hole 31 formed in the outer side surface portion 14 of the upper arm 12, and the shaft portion 38 of the leg connecting member 10 is rotatably fitted into the sliding ring 34. With such a structure, the accuracy can be easily increased, and thus the vertical movement of the top plate 1 can be smoothly performed. Further, since the connecting pipe 11 is also slidably received by the closing member 35, it is possible to prevent bending and displacement. It should be noted that the top plate fixing bracket 16 is welded and fixed to both ends of the connecting pipe 11, but since the side surface of the top plate fixing bracket 16 can be welded in contact with the end face of the connecting pipe 11, the accuracy can be easily improved. Can be issued.

Next, a structure for connecting the support portion 37 of the leg connecting member 10 and the end portion of the connecting pipe 11 in a non-rotatable manner will be described. As shown in FIGS. 5 to 8, a fitting portion 42 having an oval cross section is provided at the end of the supporting portion 37 of the leg connecting member 10 so as to project inward in the left and right direction, and is fitted at the end surface of the supporting portion 37. Protrusions 43, 43 are provided on both sides of the part 42 so as to sandwich the part from above and below, and a through hole 44 extending in the left-right direction is formed in the support part 37. Further, screw holes 45, 45 opening in the front-rear direction are formed on the front and rear arc surfaces of the fitting portion 42.

On the other hand, a substantially cross-shaped fitting hole 46 into which the fitting portion 42 and the protrusions 43, 43 are fitted is formed in the central portion of the top plate fixing member 16, and is further connected to the inside from the end portion of the connecting pipe 11. The plate 48 is welded, a screw hole 49 is formed in the center of the connecting plate 48, and through holes 50 are formed in the outer peripheral surface of the end of the connecting pipe 11.

Then, as described above, the support portion 37 of the leg connecting member 10 and the end portion of the connecting pipe 11 are rotatably attached to both side surface portions 14 and 14 of the upper arm 12, so that the leg connecting member is provided inside the upper arm 12. With the fitting portion 42 and the projections 43, 43 of the connector 10 fitted in the fitting holes 46 of the top plate fixing member 16, screws (not shown) from the through holes 50, 50 on the side surface of the connecting pipe 11 to the screw holes 45, 45. Screw 51), and a bolt 51 inserted through the through hole 44 of the support portion 37 from the side is screwed into a screw hole 49 of the connecting plate 48, so that the support portion 37 of the leg connecting member 10 and the end of the connecting pipe 11 are connected. Parts are attracted to each other and firmly connected.

In the leg connecting member 10, the upper protrusion 43 is formed to have a front-rear width larger than that of the lower protrusion 43, and each fitting hole of the top plate fixing fittings 16 and 16 fixed to both left and right ends of the connecting pipe 11. In each of 46 and 46, the opening corresponding to the upper protrusion 43 has a front-rear width larger than that of the opening corresponding to the lower protrusion 43. Thereby, when the leg connecting members 10 and 10 are connected to the left and right ends of the connecting pipe 11, the upper and lower protrusions 43 and 43 of the leg connecting member 10 are inserted according to the opening shape of the fitting hole 46. The left and right leg connecting members 10, 10 can be made to have the same vertical direction, and the assembling property can be improved.

Next, a drive mechanism for operating the operation tool 15 and the lock fitting 17 will be described with reference to FIGS. In the description of the drive mechanism, the front-back direction is based on the direction when the top plate 1 is in the use posture 1C.

For each of the first and second lock mechanisms 4A and 4B, an operation tool 15 (operation lever) that is long in the front-rear direction is arranged at a position near the front-rear end in the upper arm 12. A pair of bushes 52 provided at the front and rear inner end portions (the end portions on the side of the rotating shaft 2) of the operation tool 15 on both side surface portions 14, 14 of the upper arm 12 at positions on the front and rear outer sides of the support holes 30, 30. It is rotatably provided by an interlocking shaft 53 made of a square pipe for interlocking with the left and right.

More specifically, the bush 52 is made of synthetic resin, and has a sleeve portion rotatably fitted in circular holes 55, 55 formed in both side surface portions 14, 14 of the upper arm 12 on the outer side and at the center thereof. A square hole into which the interlocking shaft 53 is non-rotatably fitted is formed. The operating tool 15 is made of synthetic resin, and has a square hole 58 into which the interlocking shaft 53 is non-rotatably fitted at the front and rear inner ends thereof, and the locking metal fitting 17 is provided at a position closer to the rotating shaft 2 than the square hole 58. A pressing portion 59 for contacting the operating pieces 28, 28 from below to rotate the lock fitting 17 against the elastic biasing force is formed, and a pressing portion 59 is provided between the operating pieces 28, 28 at the center of the upper surface of the pressing portion 59. A matching spacer portion 60 is provided so as to project.

Then, the bushes 52 are inserted into the circular holes 55, 55 of the both side surface portions 14, 14 of the upper arm 12 respectively from the inner side to rotatably hold the bushes 52, and the operation tool 15 is dropped inside the upper arm 12 so that both bushes are inserted. With the square hole 58 of the operating tool 15 positioned between the two 52, 52, the end of the interlocking shaft 53 is inserted in order of the left and right inner bush 52, the square hole 58 of the operating tool 15, and the left and right outer bush 52. To do. In this state, the operation tool 15 can be rotated by the bushes 52, 52 via the interlocking shaft 53. Further, since the spacer portion 60 of the operation tool 15 is positioned by being fitted between the operation pieces 28, 28 of the lock fitting 17, the lock fitting 17 is positioned in the direction of the support shaft 18.

In the present embodiment, front and rear operating tools 15, 15 are provided on the left and right top plate supporting portions 5, 5, respectively, and a total of four operating tools 15 are provided. When any one of the operation tools 15 is pushed down and rotated, the operation tool 15 connected to the operation tool 15 via the interlocking shaft 53 is rotated downward, and the left and right lock mechanisms 4 and 4 of the left and right lock mechanisms 4 and 4 are rotated. The lock state of the first lock mechanism 4A, 4A or the left and right second lock mechanisms 4B, 4B is released, and the top plate 1 is used between the use posture 1C and the first storage posture 1A, or the use posture 1C and the second storage posture. 1B can be rotationally displaced.

When the use posture 1C and the first or second storage posture 1A or 1B are reached, the lock mechanism 4 (both the first and second lock mechanisms 4A and 4B) is automatically locked. .. In the present embodiment, since the operating tool 15 is pushed down to release the locked state of the lock mechanism 4, the locked state is not released even if a foot or another object abruptly hits the operating tool 15. In addition, the knee of the user sitting at the position close to the side of the top plate 1 may hit the operating tool 15, and the locked state is not released even in such a case.

Further, a lower cover member 61, which is substantially concave in a side view, is attached to the lower central portions of the side surface portions 14, 14 of the upper arm 12. The lower cover member 61 is disposed between the front and rear operation tools 15 and 15 and is disposed below the top plate fixing metal fittings 16 and the lock metal fittings 17 and 17 of the first and second lock mechanisms 4A and 4B and the support shafts 18 and 18. Covering. At the center of the lower surface of the lower cover member 61 (at a position farthest from the top plate 1 in the top plate support portion 5), a cushioning member 62 such as a plate rubber is provided. The cushioning member 62 prevents the top plate support portion 5 from contacting and damaging the top plate 1 of another table 100 when the table 100 is stacked and stored.

Further, as described above, the upper ends of the legs 3 and 3 are connected by the connecting pipe 11 via the leg connecting members 10 and 10 to be integrated so as to have strength. However, no connecting beam is provided in the lower part of the leg support 7 of the leg 3 in order to widen the foot putting space. Further, when the top plate 1 has a wide width, the central portion may bend downward. Therefore, the spacer member 63 (see FIGS. 1 and 2) is interposed between the top plate 1 and the connecting pipe 11. To prevent bending. It should be noted that the spacer member 63 may be provided at any position such as the central portion, and an appropriate number of spacer members 63 may be provided according to the lateral width of the top plate 1.

As described above, in the folding table 100 of the present embodiment, the top plate 1 is supported on the legs 3 via the pivot shafts 2 extending horizontally in the left and right directions, and the substantially horizontal use posture 1C and the standing posture 1A, It is configured to be rotatable with respect to 1B. Then, the top plate 1 in the use posture 1C has a first storage posture 1A rotated in a first rotation direction RA that is forward or backward, and a second rotation direction RB that is opposite to the first rotation direction RA. It is rotatably supported with respect to the second storage posture 1B which has been rotated. Further, the table 100 includes a first lock mechanism 4A for restricting rotation of the top plate 1 in the use posture 1C in the first rotation direction RA and a second lock mechanism 4A for restricting rotation in the second rotation direction RB. And a locking mechanism.

According to the table 100, the top plate 1 is between the first storage posture 1A rotated in the first rotation direction RA from the use posture 1C and the second storage posture 1B rotated in the second rotation direction RB. Since the table 100 is rotatably supported, the direction of the table 1 in the stored posture can be changed by rotating the table 1 without horizontally rotating the table 100 itself. As a result, the labor of the user and the working time at the time of stacking and storing can be reduced, and the convenience of the table 100 is improved.

Further, in the table 100, when the first lock mechanism 4A is released, the second lock mechanism 4B in the locked state moves the rotatable range of the top plate 1 between the use posture 1C and the first storage posture 1A. Limit to range. On the other hand, when the second lock mechanism 4B is released, the first lock mechanism 4A in the locked state limits the rotatable range of the top plate 1 to the range between the use posture 1C and the second storage posture 1B. .. As a result, the top plate 1 can be prevented from rotating in an unintended direction when the user releases the first or second lock mechanism 4A or 4B, and the safety and operability when the posture of the top plate 1 is changed. Can be improved.

Further, in the table 100, the rotation of the top plate 1 in the first or second storage posture 1A or 1B is restricted by the first and second lock mechanisms 4A and 4B in the locked state. Thereby, it is not necessary to separately provide a dedicated lock mechanism for holding the top plate 1 in the first and second storage postures 1A and 1B, and thus it is possible to suppress an increase in manufacturing cost due to the provision of the dedicated lock mechanism. It is possible to prevent the lock release operation from becoming complicated due to an increase in the number of lock mechanisms.

In addition, in the table 100 according to the present embodiment, the first and second lock mechanisms 4A and 4B in the top plate support portion 5 are provided in the upper arm 12 that extends in the depth direction of the top plate 1 (direction orthogonal to the rotation axis 2). The first and second locking mechanisms 4A and 4B share the top plate fixing member 16 so that the locking mechanism 4 including the first and second locking mechanisms 4A and 4B can be disposed. With a compact structure, the space occupied by the lock mechanism 4 on the lower surface of the top plate 1 is saved, and the appearance and usability of the table 100 are improved.

In the lock mechanism 4, the first lock mechanism 4A and the second lock mechanism are arranged at positions shifted in the left-right direction, and the top plate fixing metal fitting 16 is provided for each lock mechanism 4A, 4B. 4A and the second lock mechanism 4B may be independently configured. For example, regarding the lock mechanism for positioning the posture of the top plate 1, only one of the left and right top plate support portions 5 and 5 may be provided with only the first lock mechanism 4A, and the other may be provided with only the second lock mechanism 4B.

Further, as shown in FIG. 8, in the present embodiment, the top plate fixing metal fittings 16 of the first lock mechanism 4A and the second lock mechanism 4B are pivoted with the lower engagement portion 21 of the front and rear sides in a side view. An angle formed by a straight line connecting the axis 2X of the shaft 2 and a straight line connecting the other lower front and rear lower engaging portions 21 and the axis 2X is approximately 90 degrees. Further, a straight line connecting one of the front and rear lower engaging portions 21 and the axis line 2X of the rotating shaft 2 and one of the front and rear upper engaging portions 23 (the upper engaging portion located above the front and rear lower engaging portions 21). The angle formed by the joining portion 23) and the straight line connecting the axis 2X is also approximately 90 degrees. The angle formed by the straight line connecting the lower engaging portion 21 of the other front and rear and the axis 2X of the rotary shaft 2 and the straight line connecting the upper engaging portion 23 of the other front and rear and the axis 2X is also approximately 90 degrees. .. The angle formed by the straight line connecting the lock pin 19 of the first lock mechanism 4A in the locked state and the axis 2X and the straight line connecting the lock pin 19 of the second lock mechanism 4B in the locked state and the axis 2X is also approximately 90 degrees. Is.

As a result, when the lock pins 19, 19 of the first and second lock mechanisms 4A, 4B are located at the front and rear lower engaging portions 21, 21 of the top plate fixing member 16, the top plate 1 is in a substantially horizontal use posture. On the other hand, when the lock pins 19, 19 are positioned at the upper and lower lower engaging portions 21 and the upper engaging portions 23 while being maintained at 1C, the top plate 1 is in a substantially vertical first or second storage posture 1A or 1B. Maintained at.

Further, an angle formed by two straight lines connecting the front and rear lower engaging portions 21, 21 and the axis 2X, an angle formed by two straight lines connecting the upper and lower lower engaging portions 21 and the upper engaging portion 23 with the axis 2X, In addition, the angles formed by the two straight lines connecting the lock pins 19 and the axis 2X are set to the same angle, and the top plate 1 is used in a substantially horizontal use posture by setting the angles to be less than 90 degrees or greater than 90 degrees. On the other hand, it is possible to maintain the top plate inclining with respect to the vertical direction in the first or second storage posture 1A or 1B while maintaining it at 1C.

In the present embodiment, the angle formed by the two straight lines connecting the upper and lower lower engaging portions 21 and the intermediate engaging portions 22 and the axis 2X is set to 45 degrees, so the intermediate posture 1D (see FIG. 9(A )) is held in a state of being inclined approximately 45 degrees with respect to the horizontal. However, by changing the angle, the angle of the top plate 1 in the intermediate posture 1D may be appropriately changed. It is possible.

Further, the first lock mechanism 4A and the second lock mechanism 4B are configured to be able to switch between a locked state and a released state by rotating the lock pin 19 with the support shaft 18 extending in the left-right direction as a fulcrum. For example, the lock pin 19 is provided so as to be displaceable in the left-right direction by the operation of the operation tool 15, and when unlocking, the lock pin 19 is disengaged from the rotation locus of the engaging portions 21, 22, 23 of the top plate fixing bracket 16. Alternatively, it may be displaced in the left-right direction.

In addition, the folding table 100 has a first storage posture 1A in which the top plate 1 in a use posture 1C is rotated in a forward or backward first rotation direction RA, and a direction opposite to the first rotation direction RA. A lock that rotatably supports between the second storage posture 1B rotated in the second rotation direction RB and holds the top plate 1 in the use posture 1C, the first storage posture 1A, and the second storage posture 1B. The lock mechanism 4 is provided with the mechanism 4, and the operation tools 15 and 15 of the lock mechanism 4 are provided on the lower surface of the top plate 1 with the axis line 2X of the rotating shaft 2 extending horizontally in the left and right direction interposed therebetween. Accordingly, the lock mechanism 4 can be released from either the one side edge portion 1a or the other side edge portion 1b of the top plate 1 with the axis line 2X of the rotating shaft 2 interposed therebetween. Then, when changing the posture of the top plate 1 in the use posture 1C to the first or second storage posture 1A or 1B, the user moves from one side edge portion 1a side or the other side edge portion 1b side of the top plate 1 to the other side. It is possible to omit the trouble of moving around to the side edge portion 1b or 1a side, and the convenience of the table 100 is improved.

As described above, in the table 100, two interlocking left and right operation tools 15 are provided respectively in front and back with the axis 2X interposed therebetween, so that a total of four operation tools 15 are provided. Therefore, the user can perform the unlocking operation of the lock mechanism 4 and the posture change of the top plate 1 at either the rightward position or the leftward position of the one side edge portion 1a or the other side edge portion 1b of the top plate 1.

The number of operation tools 15 provided on the lower surface of the top plate 1 for releasing the lock mechanism 4 may be at least two, with the axis 2X of the rotating shaft 2 interposed therebetween. For example, one operation tool 15 may be provided in the vicinity of each diagonal of the top plate 1, and two operation tools 15 may be provided on the lower surface of the top plate 1.

Although the embodiment has been described above, the present invention is not limited to the above-described embodiment and can be embodied in various aspects. The configuration of each unit is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 Top plate 1a One side edge portion 1b Other side edge portion 1A First storage posture 1B Second storage posture 1C Use posture 2 Rotation axis 2X Axis 3 Leg 4 Lock mechanism 4A First lock mechanism 4B Second lock mechanism 15 Operation Tool 100 Foldable table RA First rotation direction RB Second rotation direction

Claims (4)

A folding table in which a top plate is supported by legs via a horizontally extending pivot shaft and is configured to be rotatable between a substantially horizontal use posture and a standing storage posture,
A first storage posture in which the top plate in the use posture is rotated in a first rotation direction that is forward or rearward, and a first rotation posture that is rotated in a second rotation direction that is opposite to the first rotation direction. 2 Supports rotatably between two storage positions,
A first lock mechanism that restricts rotation of the top plate in the use posture in the first rotation direction and a second lock mechanism that restricts rotation of the top plate in the second rotation direction are provided. , Folding table. When the first lock mechanism is released, the second lock mechanism in the locked state limits the rotatable range of the top plate to a range between the use posture and the first storage posture,
When the second lock mechanism is released, the first lock mechanism in the locked state limits the rotatable range of the top plate to a range between the use posture and the second storage posture. The folding table according to item 1. The folding table according to claim 1 or 2, wherein the top plate in the first or second storage posture is restricted from rotating by the first and second locking mechanisms in a locked state. A folding table in which a top plate is supported by legs via a horizontally extending pivot shaft and is configured to be rotatable between a substantially horizontal use posture and a standing storage posture,
A first storage posture in which the top plate in the use posture is rotated in a first rotation direction that is forward or rearward, and a first rotation posture that is rotated in a second rotation direction that is opposite to the first rotation direction. 2 Supports rotatably between two storage positions,
A lock mechanism for holding the top plate in the use posture, the first storage posture and the second storage posture;
A foldable table in which the operation tools of the lock mechanism are provided on the lower surface of the top plate with the axis of the rotating shaft interposed therebetween.