JP2891339B1 - table - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To firmly and stably support an upright state of a leg for a long period of time, to promote smooth folding operation and relaxation of parts accuracy, and to use bolts, nuts and screws for assembling the leg. Disclosed is a table which can be easily attached and detached, can be stably and safely stored after the legs are folded, and can prevent the unlocking operation of the legs during use, thereby obtaining a safe use state. A lower frame (2) is provided on a lower surface of a top plate (1), and a bracket (4) for attaching a leg (5) to the frame (2) is rotatably connected. The links 8, 9, 31 are bridged between the lower frame 2 and the bracket 4, and the legs 5 can be folded through the operation of the links 8, 9, 31. The bracket 4 is provided with a shaft cylinder 4a into which the legs 5 can be inserted. An opening window 18 into which an insertion tool can be inserted, facing the upper end of the leg 5 in the shaft cylinder portion 4a.
To form

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a leg standing state firmly and stably for a long period of time, promotes smooth folding operation and relaxation of parts accuracy, and uses bolts, nuts and screws for assembling the leg. By eliminating the use of such types, the legs can be easily attached and detached, and the legs can be stored stably and safely after folding, and the operation of unlocking the legs during use has been prevented to ensure a safe use condition. About the table.

[0002]

2. Description of the Related Art Conventionally, various tables have been proposed in which legs can be folded. For example, Japanese Utility Model Laid-Open No. 1-143939
In the publication, a mounting plate is fixed to the lower surface of the top plate, a leg mounting plate for mounting a leg to one end of the plate is rotatably connected, and a locking rod is movably supported at the other end, The rod is moved together with the operation of the lever, an engaging groove is formed at an end of the rising wall integral with the leg mounting plate, and the locking rod is arranged in the groove so as to be engageable. At the time of folding, the lever is pulled to release the engagement between the locking rod and the locking groove.

However, in this conventional table, the locking rod is engaged with the engaging groove to support the upright state of the legs.
There is a problem that play is likely to occur between the two due to wear of the engaging groove or the locking rod, and the standing state of the legs becomes unstable over time. In addition, screws such as bolts and nuts are required for assembling the legs, which takes time and effort to attach and detach, and the number of parts increases, and after the legs are folded, the leg mounting plate projects outside. There is a problem that the tables cannot be stacked and stored.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem, and supports the standing state of the legs firmly and stably for a long period of time, and promotes the smooth folding operation and the relaxation of the precision of parts. Eliminates the use of bolts, nuts and screws to assemble the legs, allows easy attachment and detachment of the legs, allows stable and safe storage after folding the legs, and prevents the unlocking of the legs during use. An object of the present invention is to provide a table capable of obtaining a safe use state.

[0005]

According to a first aspect of the present invention, a lower frame is provided on a lower surface of a top plate, and a bracket for mounting a leg is rotatably connected to the lower frame. In a table in which a link is hung and a leg is foldable through the operation of the link, a shaft tube portion capable of inserting a leg is provided on the bracket, and the shaft tube portion is provided at an upper end position of the leg in the shaft tube portion. By forming an opening window through which the insertion tool can be inserted and inserting the insertion tool into the opening window when removing the legs and twisting it, the removal of the legs without the need for special tools was realized. Bolts like
The complicated removal work of nuts and screws is eliminated, and this can be performed easily, so that it is possible to easily cope with the disassembly of the legs when assembling the legs or after years of use.

According to a second aspect of the present invention, the leg is press-fitted into the barrel portion, and a plurality of grooves are formed in the circumferential surface of the opening end portion of the barrel portion in the axial direction, and the circumferential surface can be displaced in the thickness direction. Along with
A ring holder is detachably fitted to the peripheral surface, and the legs can be pressed against the holder via the holder.
The use of nuts and screws is eliminated, the complicated assembly work is eliminated, and this can be performed easily, and the mounting of the legs to the bracket can be firmly performed by the press-fitting and the press-fitting by the ring holder. . According to a third aspect of the present invention, a contact wall is provided at an upper end of the bracket, the wall is arranged so as to be engageable with an end of the lower frame, and a contact wall is provided at an upper end of the bracket, and In addition to restricting the angle, the legs are prevented from turning outward, and the standing state of the legs is firmly and stably supported.

According to a fourth aspect of the present invention, a locking projection is provided on the outer peripheral surface of the shaft cylindrical portion of the bracket so that a top plate can be placed on the locking projection when the leg is folded, and the table after the leg is folded can be stabilized. It is also safe to stack and store. According to the fifth aspect of the present invention, the mounting surface of the locking projection is formed to be a flat surface, thereby improving stability and safety when the tables are stacked.

According to a sixth aspect of the present invention, one end of a pair of links is rotatably connected to the lower frame and the bracket, and the other ends of these links are rotatable from the connection position to an offset position closer to the top board. When the leg is standing, the link can be arranged obliquely between the lower frame and the bracket, and when the leg is standing, the pair of links function as braces, and the link has an external force against upward force. The strength is strengthened to prevent the legs from turning inward, and the legs are firmly and stably supported in a standing state for a long period of time.

According to a seventh aspect of the present invention, one end of one of the links is pivotably pivoted, the link is movably biased toward the other link, and the inner ends of both links are engageable. And then
In addition to strengthening the support strength of the link when the leg is standing, the standing state of the leg is firmly and stably supported over a long period of time, and the link and related parts are allowed to have some dimensional errors, and the link operates smoothly. I try to encourage you.

According to an eighth aspect of the present invention, one end of the link is rotatably connected to the lower frame, an engagement pin is provided at the other end, and the pin is engaged with and disengaged from an engagement groove formed on the peripheral surface of the bracket. It is arranged as possible, allowing easy removal of the legs, achieving the intended purpose using one link, reducing the number of parts and simplifying the configuration. The invention of claim 9 is
A handle shaft to which a handle is fixed is rotatably supported below the top plate, and a shaft holder rotatably engaged with the handle shaft is fixed to the top plate, and one end of a handle stopper is vertically attached to the holder. The other end is disposed so as to be engageable with the handle, and when the table is used, for example, even if the knee is over and touches the handle, the operation of unlocking the legs is prevented, and To improve safety.

According to a tenth aspect of the present invention, a pair of projecting arms are provided at the upper end of the bracket, and the arms are rotatably connected to both sides of the end of the lower frame, and a stopper pin projects from the lower frame. A locking portion engageable with the pin is provided on the extension arm to prevent the legs from rotating outward, thereby improving safety when using the table and improving the safety of the table. Together, the safety is enhanced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 7, reference numeral 1 denotes a horizontally long rectangular top plate, and a pair of lower frames 2 are parallel to a lower surface on a long side thereof. Mounted on

A bracket 4 is rotatably mounted on both ends of the lower frame 2 via pins 3, and legs 5 are mounted on the bracket 4 in a light press-fit state. The bracket 4 is integrally formed of synthetic resin or die-casting. A plurality of minute engaging ribs (not shown) are formed along the axial direction on the inner surface of the upper end of the hollow cylindrical shaft cylindrical portion 4a. The peripheral surface of the upper end of the leg 5 can be pressed into contact therewith.

An upper end portion of the shaft tube portion 4a is closed, and a pair of substantially disk-shaped projecting arms 6 are protruded from a peripheral surface thereof, and an end of the lower frame 2 is inserted between the arms 6 and 6. These are rotatably connected via the pins 3.

A support fitting 7 is provided on the lower surface of the top plate 1 at both ends of the lower frame 2, and the support fitting 7 and the inner extension arm 6 are provided.
One end of each of the links 8 and 9 is rotatably connected thereto. The links 8 and 9 are formed to have a substantially U-shaped cross section. Of these, the link 8 is formed to be shorter and shorter than the link 9, and an elongated pin hole 10 is formed at one end of the link 8 along the length direction thereof. Have been.

A pin 11 having a slightly smaller diameter is inserted into the pin hole 10 from the outside of the lower frame 2, and one end of the link 8 is swingably connected. In this case, the pin hole 10 is not limited to a long hole, but may be any as long as it has a diameter larger than the outer diameter of the pin 11 and can connect one end of the link 8 so as to be able to swing appropriately.

One end of the link 9 is rotatably connected to the peripheral surface of the extension arm 6 via a pin 12, and the other end is connected to the pin 1.
It is rotatably connected to the other end of the link 8 via 3 and 13. The pins 13 are arranged offset by e from the center lines of the pins 11 and 12 toward the top 1.

Both ends of the spring 14 are hooked inside the links 8 and 9, and
The link 8 is movably urged toward the link 9 through the elasticity of the above, and the substantially U-shaped end faces on the inside thereof can be engaged.

A plurality of grooves 14 are formed in the lower end portion of the shaft cylinder portion 4a, that is, in the peripheral surface on the opening end side along the axial direction.
The leg 5 can be pressed against and held through the elasticity of the shaft cylinder portion 4a partitioned by 4.

In the drawing, reference numeral 15 denotes a ring holder mounted on the peripheral surface of the lower end of the bracket 4, the inner surface of which is formed in a tapered shape gradually increasing upward, and is mounted on the peripheral surface of the lower end of the shaft cylinder 4a. At this time, the peripheral surface is pressed and shrunk so that the peripheral surface of the leg 5 can be pressed.

Also, a projecting arm 6 is provided on the peripheral surface of the bracket 4.
A projecting frame 16 projects in a direction perpendicular to the direction of the drawing, and the frame 16 is formed in a substantially U-shaped cross section. A tubular reinforcing frame 17 having a substantially same cross section is inserted into the frame 16, Are connected by

In the drawing, reference numeral 18 denotes an opening window formed on the peripheral surface of the upper end of the bracket 4 facing the upper end of the leg 5 and located between the overhanging arms 6 and 6. A tapered locking portion 18a is formed at the opening edge.

Then, an appropriate insertion tool (not shown) such as a flathead screwdriver is inserted into the locking portion 18a, and its tip is inserted between the upper end of the leg 5 and the inner surface of the shaft cylinder 4a.
The leg 5 can be detached by prying it.

A flat locking projection 19 is provided on the outer surface of the upper end of the shaft cylinder portion 4a, and the surface thereof is formed at the same height as or higher than the ring holder 15, and the projection 19 is formed when the leg 5 is folded. It is placed horizontally, and the top plate 1 of the table directly above can be placed as shown in FIG.

In the figure, reference numeral 20 denotes a support piece attached to both ends of the lower frame 2, the upper end of which is attached to the lower surface of the top plate 1.
Reference numeral 1 denotes an abutment wall extending between the overhanging arms 6 and 6. In the embodiment, a plurality of abutment walls 21 formed in a rib shape are arranged in parallel, and their abutment inner side surfaces are the same. It is arranged on a surface, and this can be engaged with the outer end surface of the support piece 20 when the leg 5 stands up, that is, when the table is used.

In addition, in the figure, reference numeral 22 denotes opposite links 9,9.
The base end of a plate-shaped handle 23 is fixed to both ends of a handle shaft having both ends fixed to the inner side surface of the handle shaft. 24
An adjuster attached to the lower end of the leg 5 is provided so that the height of the leg 5 can be adjusted, and can be brought into contact with the lower surface of the lower frame 2 when the leg 5 is folded. Reference numerals 25 and 26 denote rivets made of synthetic resin for connecting the overhanging frame 16 and the reinforcing frame 17 and their rivets, which are detachable from each other.

When assembling the table constructed as described above, a bracket assembly is connected to both ends of the lower frame 2, and a link assembly is attached to the bracket 4 and both ends of the lower frame 2. This is performed by attaching to the lower surface of the plate 1.

In the bracket assembly, the leg 5 is inserted into the shaft tube portion 4a of the bracket 4 in a light press-fit state, the ring holder 15 is fitted to the lower peripheral surface of the shaft tube portion 4a, and The reinforcing frame 17 is inserted, and these are connected by the rivet 25 and the rivet receiver 26.

That is, the leg 5 is inserted into the shaft cylinder portion 4a, and is further pushed through an appropriate pressing means such as a press machine, so that the upper end of the leg 5 is pressed into the inner surface of the engaging rib (not shown). . At this time, the ring holder 15 is inserted and placed in the leg 5 in advance, and after the leg 5 is press-fitted, the holder 15 is moved to the shaft cylinder portion 4.
It moves to the peripheral surface of the lower end portion of a, and compresses the peripheral surface against elasticity.

With this arrangement, the leg 5 is pressed against the peripheral surface, and the leg 5 is moved by the two positions of the position and the upper end.
Is firmly held by the bracket 4. In this case, the leg 5 is inserted until it comes into contact with the inner surface of the closed end of the shaft cylinder 4a, and the upper end thereof is positioned in the opening window 18 as shown in FIG.

The overhanging frames 16, 16 and the reinforcing frame 17
At the time of connection with the rivet 25, the rivet 25 and the rivet receiver 26 are fitted and assembled in advance, and the rivet receiver 26 is pushed toward the reinforcing frame 16 into a rivet hole (not shown) with arm strength.

In this manner, the rivet receiver 26 is reduced in diameter against the elasticity, recovers its original shape after passing through the rivet hole, and engages with the inner surface of the overhang frame 16, while the rivet 25 is in the reinforcing frame. The two frames 16 and 17 are connected in close contact with the surface 17.
Therefore, the connection can be easily performed without requiring a special tool.

When mounting the bracket assembly, the lower frame 2 is placed on a workbench (not shown) with the lower surface facing upward, and the extending arms 6 and 6 are inserted into the ends of the lower frame 2 and sandwiched therebetween, and the pins 3 And rotatably connected. After mounting the assembly, the leg 5 is folded around the pin 3 and the leg 5 is positioned on the lower frame 2.

Next, the pair of lower frames 2 and 2 are placed in parallel on a work table, and a link assembly is mounted inside them.
The link assembly connects the pair of links 8 and 9 to the pins 13 and
13, one end of a spring 14 is hooked on both links 8, 9, and both ends of a handle shaft 22 having a pair of left and right handles 23 attached to the inner surface of one of the links 9, 9. It is fixed by welding.

In mounting the link assembly, the pin hole 10 of the link 8 is positioned at the pivotal position of the support fitting 7, these are positioned at the connecting position of the lower frame 2, and the pins 11 are inserted from outside the lower frame 2. Then, one end of the link 8 is swingably and rotatably connected to the lower frame 2 via the support fitting 7. In addition, one end of the link 9 is inserted into the peripheral surface of the end of the inner projecting arm 6, and a pin 12 is inserted into these, so that the link 9 is rotatably connected to the projecting arm 6.

After the assembly is completed, the top plate 1 is placed on a worktable with the lower surface facing upward, and the assembly is placed on the lower surface. That is, the lower frames 2 and 2 are arranged in parallel along the long side of the top plate 1 and the temporarily fixed support members 7 and 7 are screwed to the top plate 1.
The support piece 20 is inserted into the end of the top plate 1 and this end is screwed to the top plate 1 to complete a series of assembly.

As described above, when the legs 5 are to be attached when the table is assembled, the legs 5 are pushed into the shaft cylinder portion 4a and the ring holder 15 is fitted into the peripheral surface of the lower end portion. Work can be performed simply and quickly as compared with the conventional complicated work requiring screwing of a kind.

The table assembled in this manner, that is, the table in which the legs 5 are folded down with the top plate 1 down as in the embodiment, the legs 5 are folded substantially parallel to the top plate 1 and the adjusters 24 at the lower ends thereof. Are in contact with the lower surface of the lower frame 5. This situation is as shown in FIG. Links 8, 9
Are placed in a straight line substantially parallel to the top plate 1, and the handle 23 is located inside the lower frame 2.

When using the table from such a state, the leg 5 is turned upright about the pin 3 as a fulcrum. In this way, the extension arm 6 rotates integrally with the leg 5, and the link 9 stands up there via the pin 12, and the link 8 stands up via the pin 13. This situation is as shown in FIG.

In this case, the pin hole 10 at one end of the link 8
Is formed in a long hole having a diameter larger than that of the pin 11, so that appropriate flexibility can be obtained for the operation of the link 8, the smooth operation of the link 8, 9 can be obtained, and the link 8, 9 and the pin 1 can be obtained.
Even if there are some dimensional errors in the dimensions and assembly of the pins 0, 11, 12, 13 and their pin holes, this can be tolerated and the dimensional accuracy can be relaxed. Therefore, the manufacturing costs of those parts are reduced.

When the leg 5 stands up at a substantially right angle with respect to the top plate 1, the links 8, 9 become substantially linear, and the links 8, 9
9 is positioned obliquely between the extension arm 6 and the lower frame 2, and the end of the contact wall 21 contacts the support piece 20. Thereafter, if the table is turned over and the legs 5 are erected on the floor, the intended use state can be obtained.

This situation is as shown in FIG.
The inner end face of the link 9 is firmly engaged by the elasticity of the spring 14, and the pin 13 is offset from the axis of the pins 10, 11 to the top board 1, and the links 8, 9 are located on the top board 1 side. Prevent bending to

Therefore, the links 8 and 9 function as a kind of rigid body, and act as a brace between the overhang arm 6 and the lower frame 2 to prevent the rotation of the leg 5 around the pin 3 as a fulcrum. I do. Further, the contact between the contact wall 21 and the support piece 20 prevents rotation of the leg 5 to the outside.
The locked state of the leg 5 is formed by the action of the contact wall 9 and the contact wall 21.

In this case, since the pin 11 is urged toward the link 9 by the spring 14, the pin 11 is not affected by the abrasion of the pin 11, and the top plate 1 is firmly and stably supported for a long period of time. Maintain safety.

Next, when the table 5 is not used and the legs 5 are folded for storage, the table is moved to a predetermined storage location, turned over, and the top plate 1 is placed on an appropriate table.
The handle 23 is held, and the handle 23 is erected on the handle shaft 22 as a fulcrum.

In this way, the link 9 stands on the pin 12 as a fulcrum, the inner end surface of the link 9 disengages from the inner end surface of the link 8, and the end portion initially projects upward, and the link 8, 9 bends in a substantially mountain shape.

As a result, the other end of the link 9 is pulled downward, the projecting arm 6 pivots inward with the pin 3 as a fulcrum, and the end face of the contact wall 21 is separated from the support piece 20 and the leg 5 Release the locked state of.

Thereafter, the user releases his / her hand from the handle 23, and instead holds the leg 5 and pivots inward around the pin 3 as a fulcrum. By doing so, the pin 12 moves together with the extension arm 6 and moves downward, that is, toward the top plate 1 side, and the chevron shape of the links 8 and 9 gradually becomes flat.

In this case, the pin hole 10 at one end of the link 8
Is formed in a long hole having a diameter larger than that of the pin 11, so that appropriate flexibility can be obtained for the operation of the link 8, and the smooth operation of the links 8, 9 is promoted.

Thus, when the leg 5 is folded and the adjuster 24 at the lower end thereof comes into contact with the lower frame 2, the operation is completed. This situation is shown in FIGS. 5 to 7, in which the leg 5 is folded substantially parallel to the top plate 1 and the links 8 and 9 are folded linearly.
9 are located.

Next, the legs 5 of another table are set in the same manner as described above.
Is folded, the table is moved onto the table after the folding, and the top plate 1 is placed on the locking projection 19. In this case, the four corners of the upper top plate 1 are supported by the locking projections 19, and the projections 19 are formed on a wide flat surface, so that the table is horizontally and stably supported. . Therefore, a plurality of tables can be stably and safely stacked and stored.

When disassembling the table at the time of assembling the table or after aged use, the table is placed on the work table in an inverted state, and the legs 5 are raised. Next, lightly tap the ring holder 15 in the axial direction, remove the ring holder 15 from the shaft cylinder 4a, and insert a plug-in tool such as a flathead screwdriver into the opening window 18.
, And insert the distal end thereof between the upper end of the leg 5 and the closed end of the shaft cylinder 4a, and pry it up and down to release the press-fit state between the leg 5 and the bracket 4, The leg 5
From the bracket 4.

As described above, when removing the leg 5,
This can be easily performed without the need for a special tool and the complicated work of removing screws such as screws or bolts.
Then, after the legs 5 are removed, the other portions are removed and disassembled by using appropriate tools.

For example, if the flange portion on the surface of the rivet 25 is gripped with a tool such as pliers or pliers and pulled outward, the rivet receiver 26 is reduced in diameter against the elasticity and pulled out from the rivet hole. The overhang frame 16 and the reinforcement frame 17 are easily disassembled.

FIGS. 8 to 14 show another embodiment of the present invention, in which the same reference numerals are used for components corresponding to those described above. In this embodiment, of the pair of extending arms 6 arranged inside and outside the lower frame 2, the extending arm 6 arranged inside
A cam face 27 having a substantially waveform is formed on the peripheral end face of the face a.
To form a flat end 27b.

The cam face 27 allows the protruding arm 6a to rotate around a stopper pin, which will be described later, so that the locking portion 27a can be engaged with the stopper pin. It is arranged to be engageable.

Further, the projecting arm 6b disposed on the outside is formed in a substantially semicircular shape, and a cam groove 28 having the same groove bottom as the cam face 27 is formed on the inner surface thereof at a position corresponding to the cam face 27. The locking portions 28 are provided at both ends of the cam groove 28.
a. The cam groove 28 allows a protruding arm 6b to rotate around a stopper pin, which will be described later, and arranges a locking portion 28a so as to be able to engage with the stopper pin.

An engaging groove 29 which opens obliquely downward is formed on the base side of the projecting arm 6a. A substantially curved linear cam 30 is formed at the opening edge of the groove 29. The mating pin 32 can be engaged.

The link 31 has a hollow cylindrical, strictly speaking, a base end having a substantially half-moon-shaped cross-section, into which a pin 11 having an intermediate portion having a substantially half-moon-shaped cross-section is inserted. They are movably connected.

The link 31 has a pair of link plates, an engagement pin 32 is connected to the tip of the plate, and both ends of the torsion spring 33 are hooked between the link 31 and the support fitting 7. The link 31 is urged to rotate toward the projecting arms 6a and 6b.

The stop link 34 is fixed to both ends of the tubular handle shaft 22 and has a substantially semicircular through-hole (not shown) which can be engaged with the pin 11 on its plate surface. 11, the handle shaft 22 and the link 31 are movably connected to each other, and the distal end of the handle shaft 22 can be brought into contact with the lower surface of the top plate 1. I have.

A shaft holder 35 is fixed to the center of the lower surface of the top plate 1 facing the handle shaft 22, and the holder 35 is substantially inverted U
A bearing portion 36 having a semicircular cutout is formed in the opposite bent piece, and the handle shaft 22 is rotatably engaged with the bearing portion 36.

The shaft holder 35 opposite to the bearing 36
A shaft 37 is rotatably supported at an end of the handle 37, and a base end of a handle stopper 38 is fixed to the shaft 37.
Is always disposed slightly above the handle 23 at all times.

In the drawing, reference numerals 39, 39 denote stopper pins provided at both ends of the lower frame 2, which are arranged so as to protrude in the rotation area of the locking portions 27a, 28a and abut against the locking portions 27a, 28a. Making it possible.

In the table thus constructed, one link 31 is used as a means for connecting the bracket 4 to the lower frame 2 instead of using the two links 8 and 9 as described above, and the number of parts is reduced accordingly. In addition to reducing the amount of time required for assembly and assembly, the space occupied by the link 31 is reduced, and the appearance is improved.

The assembly of the table of this embodiment is substantially the same as that described above, except that the link 3
1 is not connected, the bracket 4 can be attached separately from the attachment of the link 31, and this can be easily performed. That is, the stopper pins 39 are attached to both ends of the lower frame 2, and the pins 39 are positioned in the rotation area of the locking portions 27 a and 28 a, and the lower frame 2 and the extending arms 6 a and 6 b can be rotated by the pins 3. Connect to At this time, the shaft cylinder portion 4a of the bracket 4
And connect the leg 5 to it.

Further, bearing portions 3 are provided at the center of the lower surface at both ends of the top plate 1.
6 with the shaft holder 35 attached upward, and the bearing 3
6 is engaged with the handle shaft 22, and both ends thereof are rotatably connected to the lower frame 2 via the stop link 34 and the pin 11.

That is, the shaft tube portion of the link 31 and the stop link 34 are arranged inside the lower frame 2, and these are
And the link 31 is rotatively urged downward through a torsion spring 33 to engage the engaging pin 32 with the engaging groove 29 of the extension arm 6a. The link 31 or the handle shaft 22 and the stop link 34 are connected so as to be movable.

Such an assembling condition is as shown in FIG. 12, in which the leg 5 is folded substantially parallel to the top plate 1 and the engaging pin 32
Is urged by the torsion spring 33 and engages with the engagement groove 29 to maintain the folded state.

In this case, the stopper pin 39 is located on the side opposite to the locking portions 27a, 28a, the tip of the handle 23 is located obliquely upward, the stop link 34 is located substantially horizontally, 1 so as to be engageable with the lower surface thereof. These states are held by the pin 11 and the torsion spring 33. At this time, the handle stopper 38 is tilted substantially horizontally with the top plate 1 due to vibration during assembly and the like.

When the table is used in such a situation, the leg 5 is held and the leg 5 is turned upright about the pin 3. In this way, the bracket 4 rotates synchronously, and the locking portions 27a and 28a approach the stopper pin 39, while the engaging groove 29 retreats from the turning area of the engaging pin 32 and engages with the pin 32. When the link is released, the link 31 stands up and pivots against the elasticity of the torsion spring 33 as shown by the imaginary line in FIG. 12, and the stop link 34 moves together with the link 31 so that the distal end of the handle 23 is inclined obliquely downward. Located in.

When the bracket 4 is rotated by approximately 90 °, the leg 5 stands upright with respect to the top plate 1 and the locking portions 27a,
28a abuts against the stopper pin 39, the abutment wall 21 abuts against the outer end surface of the support piece 20, and the engagement pin 32
Slides on the peripheral end surface of the overhang arm 6a, and the cam face 27
From the front end to the engaging portion 27b and engage with the engaging portion 27b.

As a result, the link 31 rotates integrally with the pin 11 toward the projecting arm 6a, and the handle shaft 22 moves together with the link 31 so that the tip of the handle 23 is positioned obliquely upward.
Thereafter, the table is moved from the worktable to the floor, and the end of the leg 5 is set on the floor, so that the table can be used.

This situation is as shown in FIG.
28a abuts against the stopper pin 39, the abutment wall 21 abuts against the outer end surface of the support piece 20 to prevent the leg 5 from rotating outward, and the engaging pin 32 locks the extension arm 6a. Part 27b
To prevent the leg 5 from rotating inward, thereby forming a locked state of the leg 5.

The handle stopper 38 pivots downward about the shaft 37 by gravity, and its lower end is positioned directly above the handle 23 so as to be engageable. Therefore, for example, even if the user's knee touches the handle 23 when using the table, the handle 23 is engaged with the handle stopper 38 and the upward rotation is prevented. Without being released, a safe and stable use state of the table can be obtained.

When the table 5 is to be folded and stored after use of the table, the table is moved to a predetermined storage place, turned over, the top plate 1 is placed on an appropriate table, and the handle 23 , And is turned downward against the elasticity of the torsion spring 33, that is, turned toward the top 1.

In this manner, the handle shaft 22 rotates integrally with the handle 23, and the stop link 34 fixed to the end thereof rises and rotates integrally with the pin 11, and the link 31 moves together therewith. Then, the engaging pin 32 is retracted from the locking portion 27b, and the engagement with the locking portion 27b is released. That is, the locked state is released.

When the leg 5 is held and the pin 11 is pivoted downward about the fulcrum, the extending arms 6a and 6b are pivoted inward about the pin 3 and the end face of the contact wall 21 is Away from the stopper pins 39a and 28a.
Separate from.

In the meantime, the engaging pin 32 engages with the peripheral end surface of the overhang arm 6a, and the engaging groove 29 gets over the cam 30 and becomes closest, that is, the leg 5 is folded substantially parallel to the top plate 1. By the way, it engages with the groove 29. For this reason, the link 31 rotates toward the projecting arm 6a, the pin 11 and the stop link 34 move together, and the lever 23 moves further, forming the situation of FIG.

When the table is folded, the engaging pin 32 is urged to the back of the engaging groove 29 via the torsion spring 33, and the cam 30 projects from the lower opening edge of the engaging groove 29. As a result, the engagement between the pin 32 and the engagement groove 29 is strengthened, and the folded state is stabilized.

Next, in the same manner as described above, another table 5
Is folded, the table is moved onto the table after the folding, and the top plate 1 is placed on the locking projection 19. In this case, the four corners of the upper top plate 1 are supported by the locking projections 19, and the projections 19 are formed on a wide flat surface, so that the table is horizontally and stably supported. . Therefore, a plurality of tables can be stably and safely stacked and stored.

The procedure for removing the leg 5 when assembling the table or disassembling the table after use over time is as follows.
This is the same as the above embodiment.

[0083]

According to the first aspect of the present invention, a bracket is provided with a shaft tube portion into which a leg can be inserted, and an opening window through which a plug-in can be inserted is provided facing the upper end of the leg in the shaft tube portion. Because it was formed, when inserting the insertion tool into the opening window when removing the legs and twisting it, the legs can be removed without the need for special tools, and the complicated bolts, nuts and screws like the conventional ones This can be easily performed by eliminating the removal work, and can easily cope with the disassembly of the leg at the time of assembling the leg or after years of use.

According to a second aspect of the present invention, the leg is press-fitted into the shaft cylinder, and a plurality of grooves are formed in the peripheral surface of the opening end of the shaft cylinder in the axial direction, and the peripheral surface can be displaced in the thickness direction. Along with
Since the ring holder was detachably fitted to the peripheral surface and the legs were press-contactable via the holder, the use of bolts, nuts and screws for assembling the legs was eliminated, and the complicated assembly work was eliminated. This can be easily performed, and the legs can be firmly attached to the bracket by the press-fitting and the press-fitting by the ring holder. The invention according to claim 3 provides a contact wall at an upper end of the bracket,
Since the wall is arranged to be engageable with the end of the lower frame, the rotation angle of the leg is restricted, and the rotation of the leg to the outside is prevented, and the standing state of the leg is firmly and stably supported. can do.

According to a fourth aspect of the present invention, a locking projection is provided on the outer peripheral surface of the shaft cylindrical portion of the bracket so that a top plate can be placed on the locking projection when the leg is folded. Can be stably and safely stacked and stored. According to the fifth aspect of the present invention, the mounting surface of the locking projection is formed to be a flat surface, so that the stability and safety at the time of stacking the tables can be enhanced.

According to a sixth aspect of the present invention, one end of a pair of links is rotatably connected to the lower frame and the bracket, and the other ends of these links are rotatable to an offset position on the top plate side from the connection position. When the legs stand up, the links can be arranged obliquely between the lower frame and the bracket, so that when the legs stand up, the pair of links function as braces, and the links face upward. By strengthening the strength against external force, the inward rotation of the leg is prevented, and the standing state of the leg can be firmly and stably supported for a long period of time.

According to a seventh aspect of the present invention, one end of one link is pivotably pivoted, the link is movably biased toward the other link, and the inner ends of both links are engageable. As a result, the support strength of the link at the time of standing up the legs is strengthened, the standing state of the legs is supported firmly and stably for a long period of time, and furthermore, some dimensional errors of the link and related parts are allowed, Smooth operation can be promoted.

According to an eighth aspect of the present invention, one end of the link is rotatably connected to the lower frame, an engagement pin is provided at the other end, and the pin is engaged with an engagement groove formed on the peripheral surface of the bracket. Since it was placed as possible, we achieved the intended purpose using one link,
The number of parts can be reduced and the configuration can be simplified. According to a ninth aspect of the present invention, a handle shaft, to which a handle is fixed, is rotatably supported below the top plate, and a shaft holder rotatably engaged with the handle shaft is fixed to the top plate. One end of the stopper is rotatably mounted in the up and down direction, and the other end is disposed so as to be engageable with the handle. Therefore, when using the table, for example, even if the knee is over and comes into contact with the handle, the leg can be locked. Release operation can be prevented, and safety during use can be ensured.

According to a tenth aspect of the present invention, a pair of projecting arms are provided at the upper end of the bracket, the arms are rotatably connected to both sides of the end of the lower frame, and a stopper pin projects from the lower frame. Since the locking portion that can be engaged with the pin is provided on the overhang arm, the outward rotation of the leg is prevented, the safety when using the table is improved, and the above-mentioned contact wall is used. Together, the above-mentioned safety can be enhanced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of an embodiment of the present invention, showing a standing state of a leg.

FIG. 2 is a partial cross-sectional view of the bottom view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a front view showing a main part of the use state of the present invention, showing a halfway situation when the leg is standing up;

FIG. 5 is a front view showing a main part of the use state of the present invention, showing a situation when the legs are folded.

FIG. 6 is a right side view of FIG. 5, showing a situation when the legs are folded.

FIG. 7 is a front view showing a use state of the present invention, and shows a stacking state after the legs are folded.

FIG. 8 is a cross-sectional view showing a main part of another embodiment of the present invention,
This shows a standing state of the leg.

FIG. 9 is a bottom view of FIG. 8 with a partial cross section.

FIG. 10 is a right side view of FIG.

FIG. 11 is a front view showing a main part of a use state according to the other embodiment, showing a halfway situation when the leg is standing up.

FIG. 12 is a front view showing a main part in a use state according to the other embodiment, and shows a state after the legs are folded.

FIG. 13 is a bottom view showing an assembling state of a shaft holder and a handle shaft applied to the other embodiment.

FIG. 14 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Lower frame 4 Bracket 4a Shaft cylinder part 5 Legs 6, 6a, 6b Projection arm 8, 9, 31 Link 14 Groove 15 Ring holder 18 Opening window 19 Locking projection 21 Contact wall 22 Handle shaft 23 Handle 27a , 28a Locking part 29 Engagement groove 32 Engagement pin 35 Shaft holder 38 Handle stopper 39 Stopper pin

Claims (10)

(57) [Claims] 1. A lower frame is provided on a lower surface of a top plate, a bracket for attaching a leg is rotatably connected to the frame, and a link is bridged between the lower frame and the bracket. In the table in which the legs are foldable, the bracket is provided with a shaft tube portion into which the legs can be inserted, and the opening window through which the insertion tool can be inserted is formed facing the upper end position of the legs in the shaft tube portion. Table. 2. A leg is press-fitted into the shaft cylinder portion, and a plurality of grooves are formed in the peripheral surface of the opening end of the shaft cylinder portion in the axial direction so that the peripheral surface can be displaced in the thickness direction. 2. The table according to claim 1, wherein a ring holder is detachably fitted to the peripheral surface, and the legs can be pressed against the holder via the holder. 3. The table according to claim 1, wherein a contact wall is provided at an upper end of the bracket, and the wall is arranged so as to be engageable with an end of the lower frame. 4. The table according to claim 1, wherein a locking projection is provided on an outer peripheral surface of the shaft cylinder portion of the bracket, and a top plate can be placed on the locking projection when the leg is folded. 5. The table according to claim 4, wherein the mounting surface of the locking projection is formed as a flat surface. 6. An end of a pair of links is rotatably connected to the lower frame and the bracket, and the other ends of these links are rotatably connected to an offset position on the top plate side from the connection position. 2. The table according to claim 1, wherein the link can be arranged obliquely between the lower frame and the bracket when the leg stands up. 7. An end of one of the links is pivotably pivoted, the link is movably biased toward the other link, and the inner ends of both links are engageable. 1. The table according to 1. 8. An end of a link is rotatably connected to the lower frame, an engagement pin is provided at the other end, and the pin is removably disposed in an engagement groove formed on a peripheral surface of the bracket. Claim 1
The described table. 9. A handle shaft to which a handle is fixed below the top plate is rotatably supported, and a shaft holder rotatably engaged with the handle shaft is fixed to the top plate. Attach one end so that it can rotate vertically.
9. The table according to claim 1, wherein the other end is arranged to be engageable with the handle. 10. A pair of projecting arms are provided at an upper end of the bracket, and the arms are rotatably connected to both sides of an end of the lower frame, and a stopper pin is protruded from the lower frame. 4. A projecting arm provided with a locking portion engageable with a pin.
Or the table according to claim 8.