JPH0730755U - table - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a table with improved stability after folding the top plate, which enables stable and safe movement during storage and withdrawal, as well as enhanced support strength. [Structure] A pair of leg struts 7, 7 for rotatably connecting the top plate 1 is provided at the upper end portion, and a pair of front and rear legs 7b, 20 for mounting casters 18, 21 are provided below the struts 7, 7. The pair of legs 7b and 20 are arranged laterally apart from each other, and the leg columns 7 and 7 are arranged obliquely with respect to the horizontal plane. An approximately central position of the top plate 1 in the front-rear direction is rotatably connected to the support columns 7 and 7 at an acute angle, and the top plate 1 is attached to the diagonal leg support columns 7 and 7.
Can be placed in parallel with and to fall. One leg 7b is coaxially connected to the lower portion of the leg columns 7 and 7, and the leg columns 7 and 7 are connected together.
The other leg 20 is connected to the middle high position in a substantially vertical downward direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a table with improved stability after folding the top plate, which enables stable and safe movement during storage and withdrawal, and also has enhanced support strength.

[0002]

[Prior art]

 For example, in Japanese Utility Model Laid-Open No. 5-11832, a pair of left and right supporting legs are provided with a pair of leg rods made of square tube members as a compact and rational storage of a table in which a top plate is foldable. The front and rear and left and right are spaced apart to prevent interference between the rods, and the width of the rods is set to be equal to or greater than the wheel width of the casters to prevent mutual interference of the casters. At the time of storage, the top plate is folded and positioned vertically behind the support leg, and it is moved to the front of the support leg so that it can be stored in parallel and closely with the adjacent table.

However, this conventional one has no problem when the table is moved forward of the supporting leg during storage, but when the table in the stored state is pulled out, that is, when the table is moved in the opposite direction to the storage state, the table is moved. Since the center of gravity of the vehicle is located in the upper front, the stability is poor and it is easy for a fall accident to occur, and since the pair of leg rods are curved inward, there is concern about support strength and buckling strength. There is.

[0004]

[Problems to be solved by the device]

 The present invention solves such a problem, improves the stability of the top plate after folding, enables stable and safe movement after folding, and enhances support strength and secures locking action. The purpose is to provide a table that

[0005]

[Means for Solving the Problems]

 For this reason, the table of the present invention is provided with a pair of leg struts for rotatably connecting the top plate at the upper end, and a pair of front and rear legs for mounting casters at the lower part of the struts. And the leg columns are arranged obliquely with respect to the horizontal plane, and a substantially central position in the front-rear direction of the top plate is rotatably connected to the column at an acute angle so that the top plate is inclined. The top plate can be set upside down and the center of gravity after folding the top plate is set to the lower side near the center between the casters to improve stability after folding and at the bottom of the leg column one leg Is coaxially connected, and the other leg is connected to the middle high position of the leg strut in a substantially vertical downward direction to enhance the support strength and buckling strength of the table. Further, the present invention is characterized in that the other leg is gently curved outward to enhance the support strength and buckling strength of the table. Further, according to the present invention, a pair of leg struts for rotatably connecting the top plate is provided at the upper end, and a pair of legs for mounting casters are arranged at the lower part of the struts, and a support frame for supporting the top plate is provided. A connecting plate in which a lock lever is rotatably connected to the lever, a link having a lock pin protruding from the lever is provided for the same movement, and an engaging groove capable of engaging with the lock pin is formed in the pivot region of the pin. In the table arranged on the upper part of the leg support, the groove width of the engaging groove is formed in a taper shape that narrows to the inner side, so that looseness at the time of engaging the engaging groove and the lock pin can be prevented. It is characterized by doing.

[0006]

[Action]

 The leg support is arranged obliquely to the horizontal plane, and the front and rear direction approximately center position of the top plate is rotatably connected to the support column at an acute angle so that the top plate can be laid down in parallel with the oblique leg support. , The center of gravity of the top plate after folding is set near the center between the casters to the lower side to ensure stability after folding. Further, one leg is connected to the lower portion of the leg column in a substantially vertical direction, and the other leg is gently curved outward to strengthen the support strength and buckling strength of the leg. The groove width of the engaging groove is tapered so that it becomes narrower toward the inner part to prevent rattling when the engaging groove and the lock pin are engaged, and even if they are worn, there is no rattling engagement. And a reliable locking action can be obtained over a long period of time.

[0007]

[Embodiment] Hereinafter, an illustrated embodiment in which the present invention is applied to a mobile conference table will be described. In FIG. 1 to FIG. 12, reference numeral 1 denotes a horizontally long rectangular top plate, which has a rectangular shape at the center of its rear surface. A rectangular tubular reinforcing frame 2 is attached along the direction, and support frames 3, 3 are connected to both ends of the frame 2 by appropriate means such as welding.

The support frame 3 is formed by bending a thick steel plate into a substantially L-shaped cross section, and an upper surface of the support frame 3 is fixed to the back surface of the top plate 2 with screws. A hole 4 is formed, and a pin 5 having a screw portion 5a is inserted into the hole 4.

On the outside of the bending pieces 3 a, 3 a, steel plate connecting plates 6 and 6 are arranged at a small interval e, and the plates 6 and 6 form the inside of the upper leg strut 7 a constituting the leg strut 7. It is fixed to the side. The connecting plates 6 and 6 are formed in a vertically long and substantially rectangular shape, and their opposing middle and high positions are connected by a rectangular tubular horizontal frame 8 and a pin hole 9 into which the pin 5 can be inserted is formed at the upper front end side thereof. Engagement grooves 10 and 11 are formed by notches at the other side end portion, that is, the vertical position on the upper rear end side.

These engagement grooves 10 and 11 are formed in a taper shape in which the groove width is gradually reduced toward the inner part, and their engagement centers are centered on the pin 5 as shown by the chain line in FIG. The engaging grooves 10 and 11 are located on the same turning radius and are formed along the turning locus of the lock pin described later.

Under the connecting plates 6 and 6, through holes 12 and 12 having counterbore surfaces are provided, and bolts 13 and 13 can be inserted therein.

The upper leg strut 7a is formed of a square tube member, and the length thereof is formed to be substantially half the length of the leg strut 7. The upper leg strut 7a is attached obliquely to the front from the substantially central position of both ends of the top plate 1. A through hole 14 into which the screw portion 5a can be inserted is formed in the upper portion on the inner side thereof, and a nut 15 into which the screw portion 5a can be screwed is fixed to an inner opening edge portion of the hole 14 by appropriate means such as welding.

An engaging piece 16 integral with the lower leg strut 7b, which is a leg, is fitted inside the lower side of the upper leg strut 7a, and the piece 16 has a substantially U-shaped cross section. Screw holes 17, 17 into which the bolt 13 can be screwed are provided at the upper and lower positions thereof.

The lower part of the engagement piece 16 is fixed to the inside of the upper end of the lower leg strut 7b by an appropriate means such as welding, and the lower leg strut 7b is a rectangular tube member having the same shape and substantially the same length as the upper leg strut 7a. The lower end portion is arranged immediately below the front end portion of the top plate 1, and the caster 18 is attached to the portion.

A mounting joint 19 is fixed to the upper portion of the outer peripheral surface of the lower leg support 7b, and the upper end of the auxiliary leg 20 is connected to the joint 19 substantially vertically, and the lower end is directly below the rear end of the top plate 1. The caster 21 similar to the caster 18 is attached to the portion.

The auxiliary leg 20 is composed of a circular pipe member, which is gently curved outward as shown in the drawing, and is arranged slightly inward from just below both ends of the top plate 1 as shown in FIG. The offset amount D is offset outward from the leg support 7, and the offset amount D is set wider than the width W of the casters 18 and 21, and the distance d is set between the casters 18 and 21. Has been done.

A tubular connecting rod 22 is rotatably supported between the longitudinal center positions of the bending pieces 3a, 3a, and one end of the rod 22 has a shaft portion 23a of a lock lever 23 having a substantially L-shape. Is inserted, and the shaft portion 23a is fixed with a screw 24. The lock lever 23 is extended to the rear end of the top plate 1 along the outside of the support frame 3, and a shaft cylinder 25a integral with the lever handle 25 is screwed to the other end.

At both ends of the connecting rod 22, one end of the link 26 is fixed to the inner surface of the bent piece 3a by an appropriate means such as welding, and the other end can be engaged with the engaging grooves 9 and 10. The lock pin 27 is projected.

A torsion spring 28 is inserted in the connecting rod 22 between the link 26 and the bending piece 3a, and the spring 28 is hooked at one end thereof to a spring receiver 29 protruding from the inner surface of the bending piece 3a. , The other end is hooked on the link 26, and the elasticity of the link 26 is used to bias the link 26 inward, that is, to the leg strut 7 side, and to rotate the lock lever 23 integral with the link 26 downward. It is urgently movable.

In the figure, 30 is a curtain plate disposed between the upper front ends of the leg columns 7 and 7, and a pair of sandwiching pieces 30 a and 30 b are provided at the upper and lower ends thereof so as to project inwardly, and these are sandwiched by the horizontal frame 8. The upper and lower surfaces and the pin 31 protruding from the engaging piece 16 are fitted and attached. In addition, 32 is a load receiving rod arranged between the support frames 3 and 3, 33 is a synthetic resin cap attached to the upper ends of the leg columns 7, and its rear end portion functions as a top plate receiver.

In the table thus configured, the top plate 1 is horizontally set right above the leg support 7 when used, and the lock lever 23 is urged downward by the elasticity of the torsion spring 28 to be at its lowest position. It has been placed. Further, the links 26, 26 integrated with the lock lever 23 are urged inward by the elasticity of the torsion spring 28, that is, toward the leg support 7 side, and the lock pins 27, 27 engage with the engagement grooves 10, 10. Then, the horizontal posture of the top plate 1 is locked.

In this case, since the engagement grooves 10, 10 are formed in a taper shape in which the groove width gradually decreases toward the inner part, the lock pins 27, 27 are engaged in the inner part by the elasticity of the torsion spring 28. Form a good locked state without backlash. Therefore, even if the lock pin 27 and the engagement groove 10 are worn away over time due to use, a good engagement state is maintained, and play is prevented during engagement like when the engagement grooves are opened in parallel. It never happens. Moreover, since both ends of the top plate 1 are locked by the links 26, 26, the posture is stable and the top plate 1 effectively functions against an eccentric load during use, as compared with the case where the top plate 1 is locked at one place. .

In such a use, the leg columns 7 and 7 are installed obliquely upward with respect to the floor surface, and the upper end portions thereof are located substantially at the center of the top plate 1 in the front-back direction. The center of gravity of the table is set at a lower position and is set closer to the center of the top plate 1 in the front-rear direction as compared with the case where the table is installed vertically at the center or offset position, and the stability is improved. Therefore, the stability during the movement of the table is increased, and in particular, the stability of the movement after folding the top plate 1 is increased as described later.

Thus, even if the leg columns 7 and 7 are installed obliquely upward, in other words, installed in the front lower direction, the lower limb space of the table increases downward, so that the user's foot space when seated is sufficient. It can be secured widely. Moreover, since the auxiliary legs 20 and 20 are made of circular pipe members, the impact force at the time of contact with the lower limbs can be buffered compared with the conventional one made of square pipe members.

Since the auxiliary legs 20 and 20 and the lock lever 23 are arranged outside the leg columns 7 and 7, the leg is arranged in a straight line and the lock lever is arranged outside the conventional one. Compared with the above, the lower limb space of the table can be secured widely, and the space can be utilized effectively.

Moreover, one leg, that is, the lower leg strut 7b is connected to the lower part of the leg columns 7, 7 substantially vertically, and the other leg, that is, the auxiliary leg 20 is gently curved outward. Therefore, these function as a brace member for the leg support 7, and enhance the support strength and buckling strength thereof.

On the other hand, when the table is to be stored after use, for example, a hand is put on the lever handle 25, and the thumb is put on the top plate 1, and the lever handle 25 is pulled up with the thumb as a fulcrum.

In this way, the lock lever 23 moves together with the lever handle 25 and is displaced as shown by the phantom line in FIGS. 4 and 9, and the shaft portion 23a at the other end is pulled counterclockwise in FIG. To be turned. Therefore, the connecting rod 22 fixed to the shaft portion 23a rotates in the same direction, and the link 26 fixed to the rod 22 rotates in the same direction against the elasticity of the torsion spring 28, and the lock pin 27 Comes out of the engaging groove 10 and releases the locked state.

In this case, since the lock lever 23 is formed to be relatively long, it can be easily operated with a little force as compared with the conventional one having a short length. Further, since the engaging groove 10 is formed along the turning locus of the lock pin 27 around the shaft portion 23a, the pin 27 moves smoothly and the unlocked state is quickly formed. .

In this way, after releasing the locked state, the rear end of the top plate 1 is held and lifted, the top plate 1 and the support frame 3, and the connecting rod 22 pivotally supported on the frame 3 and The lock lever 23 and the link 26, which are integrated therewith, rotate in unison in the counterclockwise direction in FIG. 4 about the pins 5 and 5, and when they rotate by θ (<90 °), the lock pin 27 Is engaged with the engaging groove 11 by the elasticity of the torsion spring 28, the above rotation is stopped, the top plate 1 is folded, and this folded state is locked.

This situation is as shown in phantom lines in FIG. 4 and in FIG. 10, and the top plate 1 is folded obliquely in parallel with the leg support 7, and its front end is located at the lower end and its rear end is Position by tipping over to the top. In this case, since the engaging grooves 11, 11 are formed in a taper shape in which the groove width gradually decreases toward the inner part, the lock pins 27, 27 are engaged in the inner part by the elasticity of the torsion spring 28, and there is rattling. To form a good locked state. Therefore, even if the lock pin 27 and the engaging groove 11 are worn away over time due to use, a good engaging state is maintained, and play is prevented during engagement like when the engaging grooves are opened in parallel. It never happens.

After releasing the lock, even if the lock lever 23 is released, the folding operation and the subsequent locking operation are not hindered, and after the folding, the lock pin 27 is urged to the inner part of the engaging groove 11. Therefore, the link 26 rotates by that amount, and the lock lever 23 projects rearward as shown by the solid line in FIG. In this case, the rear end portion of the lever handle 25 is located in front of the extension line of the rear end surface of the leg column 7, and the rear end portion of the cap 33 is located behind the extension line.

When the top plate 1 is folded like this, the top plate 1 is folded obliquely in parallel with the leg struts 7 and 7, so that the center of gravity of the table is higher than that of the one vertically positioned. While moving to the center side between the casters 18 and 21, it moves downward. Therefore, the stability of the table movement after this is increased, and the fall accident is prevented.

After folding the top plate 1 in this manner, the top plate 1 is moved with the top plate 1 on the front side, as shown in FIGS. 11 and 12, and overlapped behind the stored table. That is, the leg columns 7 and 7 and the casters 18 and 18 are pushed between the auxiliary legs 20 and 20 and the casters 21 and 21 of the table after storage, and the front end surface of the top plate 1 is put into the cap 33 of the table after storage. When the contact is made, the movement is stopped.

This situation is as shown in FIGS. 11 and 12, and the auxiliary legs 20 and 20 are offset to the outside of the leg columns 7 and 7, and the offset amount D is set wider than the width W of the caster 18. In addition, since the distance d is set between the front and rear casters 18, 21, the casters 18, 18 do not interfere with the casters 21, 21 of the table after storage, and the stacking state of the table as described above is It will be possible.

Moreover, since the top plate 1 is brought into contact with the caps 33, 33 of the table after storage and the storage posture thereof is regulated, the top plates 1 of the respective tables are stored in parallel and closely and are stored. Space can be made compact.

On the other hand, when using the stored table, the table may be pulled out in the stored state and moved to a predetermined position. In this case, the moving posture of the table is opposite to the posture in which the top plate 1 is located on the rear side when the table is stored, but the center of gravity of the top plate 1 after folding is smaller than that of the conventional one as described above. Since it is located closer to the center between the casters 18 and 21 and on the lower side, the stability when pulling out and moving is good and the fall accident is prevented.

After moving to a predetermined position, for example, a hand is put on the lever handle 25, and a thumb is put on the top plate 1, the lever handle 25 is pushed up with the thumb as a fulcrum, and the lock lever 23 is moved in the phantom line of FIG. To be displaced.

In this way, the shaft portion 23a of the lock lever 23 rotates counterclockwise in FIG. 10, the link 26 integral with the shaft portion 23a rotates in the same direction, and the lock pin 27 moves. It comes out of the engaging groove 11 and the locked state at the time of folding is released.

After that, when the rear end of the top plate 1 is held and pulled down, the top plate 1, the support frame 3, and the connecting rod 22 pivotally supported on the frame 3, and the lock lever integrated with this. -23 and the link 26 rotate in the clockwise direction in FIG. 10 about the pins 5 and 5 at the same time, and when these rotate by θ (<90 °), the lock pin 27 is elastic by the torsion spring 28. The table 1 is engaged with the engaging groove 10, the above rotation is stopped, the top plate 1 is set horizontally, and this horizontal state is locked.

In this case, since the engaging grooves 10 and 10 are formed along the turning locus of the lock pin 27, the locking operation is smoothly performed, and the engaging groove 10 has a groove width toward the inner part. Since the lock pin 27 is formed in a tapered shape that gradually decreases, the lock pin 27 is engaged in the inner portion by the elasticity of the torsion spring 28, and a good locked state without rattling is formed.

As described above, according to the present invention, since the center of gravity of the table after folding the tabletop is set to be lower on the center side between the casters 18 and 21, the stability of the table is maintained regardless of the moving direction after folding. The stability of the table increases when it is stored and when it is pulled out, and it is possible to prevent a fall accident during movement and ensure its safety.

[0043]

[Effect of device]

 As described above, in the table of the present invention, the leg columns are arranged obliquely with respect to the horizontal plane, and the substantially central position of the top plate in the front-rear direction is rotatably connected to the support column at an acute angle so that the top plate is inclined. Since it can be laid down in parallel with the leg support of the car, the center of gravity after folding the top plate can be set to the lower side near the center between the casters to improve stability after folding. Therefore, in general, stability can be achieved during movement of the table, both when it is stored in the table and when it is pulled out, and when the table is pulled out, a fall accident at that time can be prevented and safety can be ensured. Further, according to the present invention, since one leg is coaxially connected to the lower part of the leg column, and the other leg is connected to the middle height position of the leg column in a substantially vertical downward direction, these two legs are connected to the leg column by a bracing member. It is possible to enhance the support strength and buckling strength of the table. Moreover, in the present invention, since the other leg is gently curved outward, the support strength and buckling strength of the table can be increased as compared with the conventional one in which both legs are curved inward. . Further, according to the present invention, since the groove width of the engaging groove that can be engaged with the lock pin is formed in a taper shape that narrows inward, it prevents rattling at the time of engaging the engaging groove and the lock pin. In addition, a reliable locking action can be obtained, and even if these are worn over a long period of time, there is a practical effect of promoting a locking-free engagement and obtaining a reliable locking action for a long period of time. It

[Brief description of drawings]

FIG. 1 is a front view showing a situation in which the present invention is applied to a mobile conference table.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a cross-sectional view showing an enlarged main part of the present invention, with a part cut away.

FIG. 5 is an enlarged bottom view showing a main part of a lock mechanism applied to the present invention.

6 is a sectional view taken along the line AA of FIG.

FIG. 7 is an exploded perspective view of a main part of the present invention.

FIG. 8 is a transverse cross-sectional view showing a pivoting state of a support frame and an upper leg support applied to the present invention.

FIG. 9 is a side view showing an essential part of the present invention before folding the top plate.

FIG. 10 is a side view showing an essential part of a situation after folding the top plate of the present invention.

FIG. 11 is a side view showing a storage state after folding the top plate according to the present invention.

FIG. 12 is a plan view showing a storage state after folding the top plate according to the present invention.

[Explanation of symbols]

 1 Top Plate 3 Support Frame 7 Leg Support 7b Leg (Lower Leg Support) 10, 11 Engagement Groove 18, 21 Caster 20 Leg (Auxiliary Leg) 23 Lock Lever 26 Link 27 Lock Pin

Claims (3)

[Scope of utility model registration request] 1. A pair of leg struts for rotatably connecting a top plate is provided at an upper end portion, and a pair of front and rear legs for mounting casters are provided at a lower portion of the struts, and the pair of legs are laterally separated from each other. In addition to arranging, the leg support is obliquely arranged with respect to the horizontal plane, the front and rear direction substantially central position of the top plate is rotatably connected to the support column at an acute angle, and the top plate is parallel to the oblique leg support. In a table that can be placed upside down, one leg is coaxially connected to the lower part of the leg column, and the other leg is connected to the middle high position of the leg column in a substantially vertical downward direction. 2. The table according to claim 1, wherein the other leg is gently curved outward. 3. A pair of leg struts for rotatably connecting the top plate is provided at the upper end portion, and a pair of legs for mounting casters are arranged at the lower part of the struts, and a support frame for supporting the top plate is provided. A leg plate is formed by connecting a lock lever rotatably, a link having a lock pin projectingly provided on the lever so as to be movable, and a connecting plate having an engaging groove engageable with the lock pin in a turning region of the pin. In the table disposed on the upper part of the table, the groove width of the engaging groove is formed in a taper shape that narrows toward the inner part.