JP4943248B2 - Folding table - Google Patents

Description

  The present invention relates to a folding table, and more particularly to a structure of a locking device that locks a top plate in a horizontal position and a standing position.

  In this type of folding table, the operation lever provided on the lower surface of the top plate is provided at different parts of the leg rod when the top plate is positioned in a horizontal position and when it is positioned in a standing position. There is one in which the top plate can be locked at each position by engaging with a provided locking portion (see, for example, Patent Documents 1 and 2).

Among them, a locking portion that engages with the operation lever when the top plate is positioned at the horizontal position, and a locking portion that engages with the operation lever when the top plate is positioned at the standing position. However, there are ones that are equidistant from the center of rotation of the top plate (Patent Document 1) and ones that are separated by a different distance (Patent Document 2).
Japanese Patent Laid-Open No. 11-276255 JP 2004-113584 A

  However, in the one described in Patent Document 1, if the distance from the center of rotation of the top plate to both locking portions is increased in order to enhance the restraining action at the time of locking, the mutual interval between both locking portions is also increased. Along with this, the member (receiving member) provided with both locking portions must be enlarged, and the appearance is deteriorated.

  In what is described in Patent Document 2, a dimensional error is likely to occur between the engaging portion far from the center of rotation of the top plate and the engaging portion of the operating lever provided on the top plate. There is a problem that rattling tends to occur between the locking portion and the operation lever is difficult to be locked to the locking portion accurately.

  The present invention has been made in view of the above-mentioned problems of the conventional technology, and the top plate can be reliably and without rattling between the horizontal position and the standing position without increasing the dimensions of the constituent members. An object of the present invention is to provide a folding table that can be strongly locked and has a good appearance.

According to the present invention, the above problem is solved as follows.
(1) The lower surface of the top plate is pivotally attached to the upper end of the leg with a pivot that faces in the left-right direction, and the top plate can be rotated between a horizontal position and a standing position with the pivot as a fulcrum. In a folding table that can be locked at a position, a locking portion is provided at two positions away from the pivot in the leg, and when the top is in a horizontal position on the top, the one far from the pivot A first locking lever that can be engaged with and disengaged from the locking portion, a second locking lever that can be engaged and disengaged with the locking portion closer to the pivot when the top plate is in the upright position, And operating means for operating the lever.

  (2) In the above item (1), a pivot is provided at the rear portion of the upper end portion of the leg rod, and two locking portions are provided in front of the shaft so as to be separated in the front-rear direction.

  (3) In the above item (1) or (2), the first locking lever and the second locking lever are linked by the first linkage means, and the first locking lever and the second locking lever are linked. Any one of the stop levers is linked to the operating means by the second linkage means.

  (4) In the above item (3), the first linkage means is a flexible cable, and the second linkage means is a Bowden cable.

  (5) In the above item (3) or (4), a required play is provided in the first linkage means, and the operation timing of the first locking lever and the second locking lever is shifted.

  (6) In any one of the above items (1) to (5), the height of the stopper that abuts the lower surface of the top plate when the top plate is in a horizontal position can be adjusted on the leg. A horizontal position adjusting means capable of adjusting the horizontal position of the plate is provided, and the first locking lever is provided at any position within the horizontal position adjusting range of the top plate adjusted by the horizontal position adjusting means. It is assumed that the distant locking portion can be locked without rattling.

  (7) In the above item (6), the first locking lever is an eccentric cam or a spiral cam that engages with a pin serving as a locking portion.

According to the present invention, the following effects can be achieved.
According to the first aspect of the invention, when the top plate is set to the horizontal position and to the standing position, the different locking portions and the locking lever can be engaged and disengaged. The dimensions of the members supporting the head and the structural members such as the locking levers can be reduced, the appearance can be improved, and the top plate can be rattled between the horizontal position and the standing position. It is possible to securely and strongly lock without generating.

  According to the second aspect of the present invention, the pivot is provided at the rear portion of the upper end portion of the leg pad, and the two locking portions are provided in the front-rear direction so as to be separated from each other in the front-rear direction. The mating first and second locking levers can be provided on the top plate with a margin by separating them from each other in the front-rear direction.

  According to the third aspect of the present invention, two locking levers can be operated by one operating means, and the number of parts can be reduced.

  According to the fourth aspect of the present invention, the operating means and the two locking levers can be linked with a simple structure.

  According to the fifth aspect of the present invention, the two locking levers can be individually operated by one operating means.

  According to the sixth aspect of the present invention, the horizontal position of the top board can be finely adjusted, and even if a slight deviation occurs between the top board and the leg by the adjustment, The stop lever can be securely locked to the locking portion without causing rattling.

  According to the seventh aspect of the present invention, even if a slight deviation occurs in the position of the locking portion when the top plate is located in the horizontal position, the eccentric cam or the spiral cam is equivalent to the deviation. The first locking lever engages with the locking portion deeply or shallowly to absorb the above-described deviation, and the first locking lever can be moved to the locking portion without rattling. It can be surely locked.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view of an embodiment of a folding table of the present invention, and FIG. 2 is a side view of the same.

  This folding table has the lower surface of the top plate 4 on the upper ends of a pair of left and right leg rods 3 and 3 erected from the center of a horizontal leg 2 facing in the front-rear direction provided with casters 1 at the front and rear ends. It pivots with the pivot 5 (refer FIG.7, FIG.8, 19-25) facing the left-right direction, and the top plate 4 makes this pivot 5 the fulcrum, and the horizontal position shown in FIG. 2, and the standing position shown in FIG. As shown in FIG. 3, a plurality of folding tables can be accommodated by being overlapped in the front-rear direction in the state of being in the standing position.

As shown in FIGS. 4 to 8, a support 6 that supports the pivot 5 is fixed to the inner surface of the upper end of each leg rod 3.
As shown in FIGS. 7 and 8, each support 6 is connected to a laterally-bottomed rectangular tube-shaped base portion 7 whose outer end is open and whose inner end is closed, and an outer upper portion of the base portion 7. , A short horizontal cylindrical portion 8 whose outer end is open and whose inner end is closed, a hanging portion 9 depending from the lower end of the outer portion of the base portion 7, and obliquely forward and upward from the inner end portion of the base portion 7. A first arm portion 10 that extends, a second arm portion 11 that extends obliquely rearward and upward from the inner end portion of the base portion 7, and a short insertion portion that projects inwardly on the inner end surface of the base portion 7. 12.

  As shown in FIGS. 4 to 6, a pair of left and right support tools is provided such that each end of a vertically long tubular connecting rod 13 facing the left and right direction is fitted to the insertion part 12 of each support tool 6. 6 and 6 are opposed to each other by the two upper and lower bolts 14 and 14 penetrating the base 7 of the support 6 including the insertion portion 12 in the left-right direction. By fixing 6 to each end of the connecting rod 13, the left and right supports 6, 6 are connected to each other via the connecting rod 13.

  The heads 14 a, 14 a of the upper and lower bolts 14, 14 are accommodated in a recess 15 formed in the base portion 7 so as to open outward, and the opening of the recess 15 is formed inside the leg rod 3. Since it is obstruct | occluded by the side surface, it does not expose outside.

  Each support tool 6 is configured such that the heads 14 a, 14 a of the bolts 14, 14 are covered with the inner surface of the leg rod 3, and the upper end of the leg rod 3 is placed on the horizontal cylindrical portion 8 at the upper end portion of each support tool 6. Bolts 16, 17 are provided at two upper and lower positions sandwiching the bolts 14, 14 so as to be fitted with circular projections 3 a facing inwardly provided on the inner surface of the member, so as to be in contact with the upper inner surface of the leg rod 3. And is fixed to the inner surface of the upper end of the leg rod 3.

  The upper bolt 16 passes through the center of the protrusion 3 a, penetrates the upper end of the leg rod 3 in the left-right direction, and has a screw hole provided at the center of the inner end surface of the horizontal cylindrical portion 8 of the support 6. 18 is screwed and fastened. The head 16 a of the bolt 16 is covered with a circular cap 19 that is detachably attached to the outer surface of the upper end of the leg 3.

  The lower bolt 17 passes through the hanging portion 9 of the support 6 in the left-right direction, and is fastened by screwing the tip portion into a screw hole 20 provided on the inner surface of the leg 3.

  4, 5, 9, 10, and 20 to 25, the lower surface of the top plate 4 has a U-shape in a front view with an opening at the lower end, and left and right 1 facing in the front-rear direction. The pair of brackets 21 and 21 and the front and rear reinforcing rods 22 and 23 facing the left and right direction connecting the front portions and the lower portions thereof are fixed to each other.

  The bracket 21 includes a horizontal attachment piece 21a screwed to the lower surface of the top plate 4, an inner piece 21b and an outer piece 21c depending on the inner and outer side edges, and the front of the inner piece 21b and the outer piece 21c. It consists of upward U-shaped reinforcing pieces 24 and 25 installed between the parts and between the rear parts.

  Between the intermediate part of the inner piece 21b and the outer piece 21c in the bracket 21, a shaft hole 26 facing the left and right direction provided in the second arm part 11 of the support 6 shown in FIGS. 7 and 8 is fitted. And both ends of the pivot 5 fixed to the support 6 with a set screw 27 are supported.

Next, the locking device A provided in the bracket 21 and locking the top plate 4 in the horizontal position and the standing position, and the operation means B will be described.
As shown in FIGS. 7 and 8 and FIGS. 20 to 25, a lock pin 28 is provided on the inner surface of the upper end portion of the first arm portion 10 of the support 6 so as to project inward. Yes. The tip of the lock pin 28 is fixed to the upper end of a crank-shaped support plate 29 whose lower end is screwed to the inner surface of the support 6. The lock pin 28 is supported by the support 6 and the support plate 29. Both ends are supported. The lock pin 28 forms a locking portion far from the pivot 5.
Further, a lock pin 30 facing in the left-right direction is also provided inwardly on the inner surface of the upper end portion of the second arm portion 11 of the support 6, and this lock pin 30 is connected to the side closer to the pivot 5. It has a stop.

  A screw hole (not shown) is provided in the upper end surface of the first arm portion 10 of the support 6, and a height adjustment bolt 33 with a lock nut 32 is screwed into the screw hole. The height adjustment bolt 33 serves as a stopper that contacts the lower surface of the top plate 4 when the top plate 4 is in the horizontal position, and the height of the top plate 4 can be adjusted. Horizontal position adjustment means that can be finely adjusted.

  As shown in FIG. 19, a horizontal attachment piece 34 a of the lever support plate 34 is fixed to the lower surface of the attachment piece 21 a of the bracket 21. The lever support plate 34 has a hanging piece 34b that hangs down from the inner edge of the mounting piece 34a and an inward side from the lower end of the hanging piece 34b at the intermediate position of the mounting piece 34a and the mounting piece 21a of the bracket 21 in the left-right direction. The horizontal piece 34c is bent at right angles to the horizontal piece 34c, and the upright piece 34d is erected from the inner edge of the horizontal piece 34c.

  The horizontal piece 34c and the hanging piece 34b of the lever support plate 34 have an entry groove 35 that allows the lock pin 28 and the support plate 29 to enter when the top plate 4 rotates from the standing position to the horizontal position. Is provided. The entry groove 35 in the hanging piece 34b has an arc shape with the pivot 5 as the center. However, if the lock pin 28 enters, the entry groove 35 may have an inverted U shape or other shapes.

  As shown in FIGS. 19 to 25, the hanging piece 34 b of the lever support plate 34 has a lock pin 28 that is a locking portion far from the pivot 5 when the top plate 4 is in the horizontal position (FIG. 20). The first locking lever 36 that can be engaged and disengaged has a shaft 37 that faces in the left-right direction, and when the top plate 4 is in the upright position (FIG. 23), a lock pin that is a locking portion closer to the pivot 5 Second locking levers 38 that can be engaged with and disengaged from each other 30 are pivotally attached to each other with a shaft 39 that faces in the left-right direction.

  The first locking lever 36 has a fan shape that expands upward from the shaft 37, and the cam surface 36 a that is in sliding contact with the lower surface of the lock pin 28 when the top plate 4 is in the horizontal position is formed by the lock pin 28. In contrast, it is a spiral cam or an eccentric cam having a spiral shape in which the distance to the shaft 37 gradually increases as it enters the lower side of the lock pin 28.

  Accordingly, the horizontal position of the top plate 4 is finely adjusted by the height adjusting bolt 33 which is a horizontal position adjusting means, and the amount of the lock pin 28 entering the entrance groove 35 when the top plate 4 reaches the horizontal position is determined. Even if the first locking lever 36 slightly fluctuates, the depth of the first locking lever 36 below the lock pin 28 slightly varies, so that the first locking lever 36 can be moved to the lock pin without rattling. 28 can be reliably locked.

  This first locking lever 36 is wound around a shaft 37 by a spring 40 which is a torsion coil spring having one end locked to the first locking lever 36 and the other end locked to the lever support plate 34. It is always urged in a direction to engage with the lock pin 28.

The first locking lever 36 and the second locking lever 38 are provided with a required play with the flexible cable 41 as the first linking means, that is, the second locking lever 38 is In a state where the first locking lever 36 is engaged with the lock pin 30 in a state where it can be engaged with the lock pin 30, the first engagement lever 36 is completely separated from the lock pin 28. A play that can move freely is provided at the release position, and they are connected to each other.
Therefore, as shown in FIG. 20, when both the first locking lever 36 and the second locking lever 38 are located at the locking position, the middle portion of the cable 41 hangs down. Until the cable 41 is tensioned, the operation timing of the first locking lever 36 and the second locking lever 38 is shifted.

The first locking lever 36 is linked to the operating means B with a Bowden cable 42 as second linkage means.
The Bowden cable 42 includes a flexible outer tube 42 a and an inner cable 42 b inserted therein so as to be slidable in the axial direction. The end portion of the outer tube 42 a on the bracket 21 side is the front of the bracket 21. The reinforcing piece 24 is fixed so as to open rearward. The rear end of the inner cable 42b drawn rearward from the end portion of the outer tube 42a is fastened to the front end portion of the arm piece 36b extending upward from the front upper end of the first locking lever 36. Yes.

  In this example, the locking device A is formed by the first locking lever 36 that engages and disengages with the lock pin 28 and the second locking lever 38 that engages and disengages with the lock pin 30.

Next, the operation of the locking device A will be described.
As shown in FIG. 20, the inner cable 42b is operated by the operation means B described later in a state where the top plate 4 is positioned in the horizontal position and the first locking lever 36 is engaged with the lock pin 28. As shown in FIG. 21, the first locking lever 36 is rotated to the disengagement position, whereby the top 4 is moved through the inclined position shown in FIG. It can be rotated to the standing position shown in FIG.

  When the top plate 4 is rotated to the upright position, the lower surface of the top plate 4 is brought into contact with a stopper 43 made of a cushioning material provided on the rear end surface of each support 6 and stopped. The lever 38 engages with the lock pin 30 by its own weight (if necessary, the second locking lever 38 may be biased toward the locking position with a spring similar to the spring 40). The top plate 4 is prevented from rotating in the horizontal position direction.

  From this state, if the operating means B is operated again and the inner cable 42b is pulled with a stroke larger than that described above, the first locking lever 36 is rotated to the release position as shown in FIG. After that, the cable 41 is tensioned and the second locking lever 38 is rotated to the release position where the second locking lever 38 is completely detached from the lock pin 30, so that the top plate 4 is free from the standing position to the horizontal position. Can be rotated.

  As shown in FIG. 25, the side of the first locking lever 36 is in sliding contact with the lock pin 28 while the top plate 4 is rotated from the standing position to the horizontal position, and resists the biasing force of the spring 40. 20 is temporarily rotated to the release position, and passes through the lock pin 28 almost simultaneously with or just before the top plate 4 reaches the horizontal position, and is locked as shown in FIG. The return to the position is made to turn, and the top plate 4 is prevented from turning in the standing position direction.

Next, the operation means B will be described with reference to FIGS.
The operation means B includes a case 44 fixed to the center of the front surface of the lower surface of the top plate 4, a rotary operation handle 46 pivotally attached to the lower surface of the case with a pivot 45 orthogonal to the lower surface of the top plate 4, A rotating plate 47 is provided on the upper and lower ends of the pivot 45 so as to be fixed to the upper end of the pivot 45 and rotated together with the rotary operation handle 46 via the pivot 45, and is incorporated in the left and right brackets 21 and 21. However, the end of the outer tube 42a, 42a on the operating means B side of the two Bowden cables 42, 42 linked to each locking device A is opened toward the pivot 45 side on a straight line orthogonal to the pivot 45. Thus, the inner cable 42 is attached to the case 44 so as to overlap each other in the vertical direction, and is pulled out from the end of the outer tube 42a, 42a on the operating means B side. , 42b are vertically overlapped on the upper surface of the eccentric portion of the rotating plate 47 on the straight line, and fixed with a pin 48, and the rotation operation handle 46 together with the rotating plate 47 is centered on the pivot 45, Regardless of the direction of rotation, both the inner cables 42b and 42b are pulled, and the left and right locking devices A and A can be operated simultaneously.

  The rotary operation handle 46 is formed in a disk shape having a pair of substantially semicircular arc-shaped concave portions 49, 49 opposed to each other on the lower surface, but can also be formed in a lever shape facing forward or other shapes. Further, the rotary plate 47 may be omitted, and the end of the inner cables 42b and 42b may be directly attached to the eccentric portion of the rotation operation handle 46.

  A circular concave portion 50 and a concave groove 51 following the circular concave portion 50 are provided above the rotating plate 47 on the lower surface of the top plate 4 and above the fixing portion of the outer tubes 42 a and 42 a with respect to the case 44. The rotating plate 47 and the pin 48 are rotatable, and the recessed portions 51 are fitted with the fixing portions of the outer tubes 42a and 42a with respect to the case 44, respectively.

  The two outer tubes 42a and 42a are guided from the fastening portion of the case 44 through the recessed groove 51 into the front reinforcing rod 22, branched into the left and right within the reinforcing rod 22, and left and right respectively. It is guided to the locking device A in the bracket 21.

According to this operation means B, the locking device A can be operated in the same manner by pulling the inner cable 42b regardless of which direction the rotation operation handle 46 is rotated about the pivot 45. A person with different dominant arms can easily operate with the same feeling, has a simple structure, can be reduced in size and thickness, and can be improved in appearance.
Further, even if another object comes into contact with the rotation operation handle 46, the rotation operation handle 46 is not rotated thereby, so there is no risk of erroneous operation.

  The case 44 is also provided with an operation lever 70 for locking and unlocking the lock device (not shown) of the caster 1, but since it is not directly related to the present invention, detailed description thereof is omitted.

Next, the cover 52 that covers the bracket 21 will be described with reference to FIGS.
The cover 52 includes a mounting piece 53 fixed to the lower surface of the top plate 4 with a pair of front and rear fixing screws (not shown), a side piece 54 and a lower piece 55 that cover the inner surface, the lower surface, and the front and rear surfaces of the bracket 21. And the front and rear pieces 56 and 57, the upper surface and the outer surface are open, and the lower arm 55 has a first arm portion 10 and a second arm portion 11 in the support provided on the upper part of the leg rod 3. A cover main body 59 provided with a notch 58 into which a top plate receiving portion formed by the cover is fitted, and a cover lid body 60 fitted into the opening on the outer side surface of the cover main body 59 and covering the outer side surface of the bracket 21. It has.

  The cover 52 as a whole has a symmetrical shape so that it can be attached to both the left and right brackets 21, 21. Therefore, the lower piece 55 of the cover body 59 has notches 58. In addition, two rectangular cutouts 58a and 58a are provided for allowing the lock pin 28 and the support plate 29 attached to the support 6 to pass therethrough, one of which is attached to the bracket 21 which is not right. For the time.

  An inward piece 61 is provided at the opening edge of the outer surface of the cover body 59 so that the inner edge of the inward piece 61 and the outer edge of the cover lid 60 are overlapped with each other. In addition, in the overlapping portion between the inwardly facing piece 61 of the cover main body 59 and the cover lid body 60, concave stepped portions 62 and 63 each having a depth of one half of the plate thickness are provided. The inner and outer surfaces of the inwardly facing piece 61 of the cover main body 59 and the cover lid body 60 are flush with each other by superimposing 63.

  On the front and rear portions of the inner surface of the cover lid 60, hook-shaped engagement claws 64, 64 projecting inward and backward inward (or outward) in a plan view are provided so as to project from the outer piece 21c of the bracket 21 and the cover lid 60. The front and rear engagement holes 65, 65 provided on the outer piece 21c of the bracket with the two engagement claws 64, 64 sandwiching the inner edge portion of the inward piece 61 of the cover main body 59 between the edge portions of the cover body 59. By engaging with the inner (or outer) edge in the front-rear direction, the edge portion of the inwardly facing piece 61 of the cover main body 59 is securely fixed to the outer piece 21c of the bracket 21 together with the edge portion of the cover lid body 60. The cover main body 59 is not likely to be peeled off from the edge.

  At this time, as described above, indented step portions 62 and 63 each having a depth of one half of the plate thickness are provided in the overlapping portion of the inward piece 61 of the cover body 59 and the cover lid body 60, By superimposing them, the inner and outer surfaces of the inward piece 61 of the cover body 59 and the cover lid body 60 are flush with each other, so that the inner surface of the inward piece 61 of the cover body 59 and the cover lid body 60 However, both are closely attached to the outer piece 21c of the bracket 21 and their support is stabilized, and the outer faces thereof are flush with each other, and there is no step, so the appearance of the cover itself is improved.

  As shown in FIG. 11 and FIG. 14, positioning projections 66, 66 are provided on the front and rear ends of the inner surface of the inward piece 61 of the cover main body 59. By fitting into positioning holes 67, 67 provided in the front and rear portions of 21 c, the inwardly facing piece 61 of the cover main body 59 is easily positioned with respect to the outer surface of the bracket 21, and is formed on the inner surface of the cover lid body 60. When the protruding engaging claws 64, 64 are locked to the edges of the engaging holes 65, 65 provided in the outer piece 21c of the bracket 21, it becomes a convenience.

  In addition, an inwardly bent piece 68 and two front and rear edges thereof stand up on the lower edge of the cover lid 60, and an upward L-shaped engagement claw is formed in cooperation with the inwardly bent piece 68. As shown in FIGS. 13 and 14, upward projecting pieces 69, 69 are provided, which are brought into contact with the lower edge of the outer piece 21 c of the bracket 21 or locked to the inner side surface of the lower edge portion. By doing so, in cooperation with the locking by the two engaging claws 64, 64, the cover lid body 60 is securely attached to the bracket without being distracted.

  As shown in FIG. 9, the front and rear reinforcement rods 22 and 23 that connect the front portions and the lower portions of the left and right brackets 21 and 21 are fitted to the front and rear portions of the attachment piece 53 of the cover main body 59. Concave portions 53a and 53a are provided.

  As is clear from the above, according to the above-described embodiment, the locking portions (lock pins 28, 30) and the locking lever 36 which are different from each other when the top plate 4 is in the horizontal position and in the standing position. , 38 can be engaged with and disengaged from each other, so that the dimensions of the members supporting both the locking portions and the structural members such as the both locking levers can be reduced, and the appearance can be improved. The top plate 4 can be securely and strongly locked without rattling between the horizontal position and the standing position.

The present invention is not limited to the above-described embodiment, and can be implemented in a modified form without departing from the scope of the claims.
For example, in the above embodiment, the first link means for linking the first lock lever 36 and the second lock lever 38 is the flexible cable 41. A link lever having both ends connected to a pin protruding from the side surface of the lever 36 or 36 may be used, or one of the pins may be engaged with a long hole provided at one end of the link lever.

It is a front view of the use condition of one Embodiment of the folding table of this invention. Similarly, it is a side view. Similarly, it is a side view when it overlaps with other folding tables as a folded state back and forth. Similarly, it is the partially exploded perspective view which looked at one side part from the diagonally forward lower side of the outside. Similarly, it is the partial exploded perspective view which looked at one side part from the diagonally forward lower side inside. Similarly, it is a center longitudinal cross-sectional front view of the connection part of a leg rod, a support tool, and a connection rod. Similarly, it is the disassembled perspective view which looked at the connection part of FIG. 6 from the diagonally forward upper part of the outer side. Similarly, it is the disassembled perspective view which looked at the connection part of FIG. 6 from the diagonally forward front inside. Similarly, it is the disassembled perspective view which looked at the bracket and the cover from the diagonally forward lower side. Similarly, it is the disassembled perspective view which looked at the bracket and the cover from the diagonally forward lower side of the outside. Similarly, it is the side view which looked at the bracket and the cover from the outer side. FIG. 12 is an enlarged longitudinal sectional front view taken along line XII-XII in FIG. 11. FIG. 12 is an enlarged longitudinal front view taken along line XIII-XIII in FIG. 11. It is an enlarged vertical front view along the XIV-XIV line in FIG. It is the bottom view which looked at the operation means from the lower part. It is the top view which looked at the operation means from upper direction. FIG. 17 is an enlarged longitudinal sectional view taken along line XVII-XVII in FIG. 16. FIG. 17 is an enlarged longitudinal sectional view taken along line XVIII-XVIII in FIG. 16. It is the perspective view which notched the center part of the bracket and looked at the internal structure from the front upper inside. 20 to 25 show the action of the locking device, and FIG. 20 is a schematic longitudinal side view of the locked state when the top plate is in the horizontal position. It is a schematic vertical side view of the unlocking state when a top plate is made into a horizontal position. It is a schematic longitudinal cross-sectional side view which shows the state in the middle of rotating a top plate to an upright position. It is a general | schematic vertical side view when a top plate is made into a standing position. It is a schematic vertical side view when unlocking in the state which made the top plate into the standing position. It is a schematic longitudinal side view which shows the state in the middle of rotating a top plate downward to a horizontal position.

Explanation of symbols

A lock device B operation means 1 caster 2 horizontal leg 3 leg rod 3a protrusion 4 top plate 5 pivot 6 support 7 base 8 horizontal cylindrical portion 9 hanging portion 10 first arm portion 11 second arm portion 12 insertion portion 13 connecting rod 14 Bolt 14a Head 15 Recess 16, 17 Bolt 16a Head 18 Screw hole 19 Cap 20 Screw hole 21 Bracket 21a Mounting piece 21b Inner piece 21c Outer piece 22, 23 Reinforcement piece 24, 25 Reinforcement piece 26 Shaft hole 27 Set screw 28 Lock pin (locking part)
29 Support plate 30 Lock pin (locking part)
32 Lock nut 33 Height adjustment bolt (horizontal position adjustment means)
34 lever support plate 34a mounting piece 34b hanging piece 34c horizontal piece 34d standing piece 35 entry groove 36 first locking lever 36a cam surface 36b arm piece 37 shaft 38 second locking lever 39 shaft 40 spring 41 cable (first Linking means)
42 Bowden cable (second linking means)
42a outer tube 42b inner cable 43 stopper 44 case 45 pivot 46 rotating operation handle 47 rotating plate 48 pin 49 recessed portion 50 recessed portion 51 recessed groove 52 cover 53 mounting piece 53a recessed portion 54 side piece 55 lower piece 56 front piece 57 rear piece 58, 58a Notch 59 Cover body 60 Cover lid 61 Inwardly facing piece 62, 63 Recessed stepped portion 64 Engaging claw 65 Engaging hole 66 Positioning protrusion 67 Positioning hole 68 Inwardly bent piece 69 Upward protruding piece 70 Operation lever

Claims (7)

The lower surface of the top plate is pivotally attached to the upper end portion of the leg rod with a pivot that faces in the left-right direction, and the top plate can be rotated between the horizontal position and the standing position with the pivot as a fulcrum, and is locked at both positions. In the folding table that can be
Locking portions are provided at two positions in the leg pad away from the pivot, and when the top plate is in a horizontal position on the top plate, a first engagement that can be engaged with and disengaged from the locking portion far from the pivot. A stop lever, a second locking lever that can be engaged with and disengaged from the locking portion closer to the pivot when the top plate is in the upright position, and an operating means for operating the both locking levers. Features folding table.   The folding table according to claim 1, wherein a pivot is provided at a rear portion of the upper end portion of the leg rod, and two locking portions are provided in front of the pivot shaft so as to be separated in the front-rear direction.   The first locking lever and the second locking lever are linked by the first linkage means, and either the first locking lever or the second locking lever is linked by the second linkage means. The folding table according to claim 1 or 2, wherein the folding table is linked to the operating means.   4. The folding table according to claim 3, wherein the first linkage means is a flexible cable, and the second linkage means is a Bowden cable.   The folding table according to claim 3 or 4, wherein the first linkage means is provided with a required play, and the operation timing of the first locking lever and the second locking lever is shifted.   A horizontal position adjustment means is provided on the leg rod so that the horizontal position of the top plate can be adjusted by adjusting the height of a stopper that contacts the lower surface of the top plate when the top plate is in the horizontal position. In addition, the first locking lever can be locked to the distant locking portion without rattling at any position within the horizontal position adjustment range of the top plate adjusted by the horizontal position adjusting means. The folding table according to any one of claims 1 to 5.   The folding table according to claim 6, wherein the first locking lever is an eccentric cam or a spiral cam that engages with a pin serving as a locking portion.

Images