JPH0720855U - Restraint control device for leg members on a desk - Google Patents

Abstract

(57) [Abstract] [Purpose] In a table in which leg members are foldable, the leg members are securely fixed in a folded state and a standing state in which the leg members are folded. [Structure] Leg members 3 are foldably provided at both ends of a lower surface of a top plate 2. The leg member 3 includes left and right leg pieces 16,
16 are connected by a connecting piece 17. The pressing piece 31 of the L-shaped plate spring 6 fixed to the central portion of the end portion of the top plate presses the lower surface of the connecting piece 17 in the standing state of the leg member, thereby fixing the leg member in the standing state. Further presser piece 31
However, the leg member is fixed in the lying state by pressing the lower surface portion of the leg member in the lying state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for restricting ups and downs of a leg member in a desk in which the leg member is foldable.

[0002]

[Prior art]

 A table shown in FIG. 11 has been proposed as a table for restricting the ups and downs of the leg member in a table in which the leg member is foldable by using a wing member having a spring property.

The table has leg members d formed by connecting left and right leg pieces b, b to each other by connecting pieces c along the edge of the top board at both ends in the length direction of the lower surface of the top board a. The connecting piece c is provided so as to rotate around its axis and undulate. A pedestal f for fixing the wing member e that restricts the ups and downs of the leg members is provided at the center of the lower surface of the top plate. The blade member e is formed by connecting the blades i, i to both ends of a central piece h fixed to the pedestal f using a large number of screws g, and is integrally manufactured by using a synthetic resin having elasticity. Has been done. The wing piece i extends obliquely upward toward the connecting piece c, and its tip portion elastically presses a flat pressing surface j formed on the lower surface of the connecting piece of the leg in the upright state. In addition, an engaging step portion n is provided at the inner end of the pressing portion k so as to be able to engage with a substantially vertical inner surface m continuous with the pressing surface j.

However, when the leg member d is in the upright state, the pressing portion k of the wing piece i elastically presses the pressing surface j and the engagement step portion n engages with the inner side surface m, so that both leg members d, The standing state of d was maintained. When the leg members are to be laid down in the folded state, for example, the table is turned upside down and a hand is inserted into the narrow gap portion o between the winglet and the lower surface of the top plate, and the inside of the pressing portion of the winglet is inserted. The side portion p is lifted to release the engagement between the engagement step portion n and the inner side surface m.

[0005]

[Problems to be Solved by the Invention] However, in such a table in which the wing members are used to regulate the ups and downs of the legs, there are various problems as described below.

Since the blade member of the blade member has a long length, the pressing force of the connecting piece by the pressing portion forming the tip end portion of the blade member is weak, and the standing state of the leg member tends to be unstable. It was

In order to lay down the leg member, a hand is inserted into a narrow gap formed between the wing piece and the lower surface of the top plate, and the inner side portion of the pressing portion of the wing piece is lifted. Since it was necessary to release the engagement between the engagement step portion and the inner side surface, there was a problem that it was difficult to fall the leg member down.

Since the leg member is fixed to the pedestal using a screw, the wing member may become unstable due to the loosening of the screw. In addition, when the blade member is damaged, even if the screw is removed and the blade member is replaced, loosening is likely to occur due to the large screw hole, and the repair can be performed reliably. There wasn't. Moreover, since repairing required skill, it was often impossible for an unskilled person, and thus the entire table was usually unusable.

When the legs get tired at a banquet, sitting work, etc., even if an attempt is made to extend the legs into the lower space of the table, the legs are freely projected because the wing members and the pedestal project into the lower space. I could not extend and relax.

An object of the present invention is to provide an undulation regulating device that can solve all of these problems at once.

[0011]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention adopts the following means.

That is, in the undulation restricting device according to the present invention, the left and right leg pieces 16, 16 are connected to both ends of the lower surface of the top plate 2 in the length direction by connecting pieces 17 along the edge of the top plate. The present invention relates to a desk provided with the leg member 3 so that the connecting piece 17 is rotated around the axis of the leg member 3 to be undulated. The table includes a general table including folding leg members, such as a table, a table, a table, and a sewing table. In the table, an L-shaped plate in which an insertion piece 30 and a pressing piece 31 are integrally connected at a base end thereof at a substantially right angle and an engaging opening 32 is provided in a base end side portion of the pressing piece 31. The insertion piece 30 of the spring 6 is inserted into the downwardly opened insertion recess 20 provided at the end of the lower surface of the top plate in a state where the pressing piece 31 projects inward in the length direction of the top plate. At the same time, the engaging projection 21 that is bulged on the lower end of the stopper piece 22 that projects downward at the end of the lower surface of the top plate is engaged with the edge 33 of the engaging opening 32. Then, the pressing piece 31 is provided on the first pressing surface 26 provided on the lower surface portion 25 of the connecting piece of the leg member in the upright state and the first pressing surface 26 provided on the lower surface portion 27 of the connecting piece of the leg member in the lying state. The second pressing surface 28 is elastically pressed, whereby the leg member is fixed in the upright state and the fallen state.

In the up-and-down regulating device, the engaging projection 21 is bulged inward in the length direction of the top plate at the lower end of the stopper piece 22 projecting downward at the end of the lower surface of the top plate. It is preferable that the engagement protrusion 21 is engaged with the inner edge portion 33 of the engagement opening 32 in the top plate length direction.

In the up-and-down regulating device, the front side portion of the pressing piece 31 is in contact with a substantially vertical inner side surface 33 of the connecting piece of the leg member in the upright state which is continuous with the first pressing surface 26. It is preferable to provide the contact portion 36. When the contact protrusion 36 is provided in this manner, the first pressing surface 26 is provided on the inner side in the top plate length direction of the lower surface portion 25 of the connecting piece, and the second pressing surface 28 is the connecting piece. It is preferable that the first pressing surface 26 and the second pressing surface 28 are provided on the outer side of the lower surface portion 27 in the length direction of the top plate, and are continuous with each other through a connecting surface 29 that is substantially flat. Further, it is preferable that the pressing piece 31 has a grip portion 37 that protrudes inward from the contact protrusion 36 in the length direction of the top plate.

In such an up-and-down regulating device, it is preferable to use, as the L-shaped leaf spring, one in which the insertion piece 30 and the pressing piece 31 are connected at an angle slightly smaller than a right angle.

[0016]

[Action]

 In the L-shaped leaf spring 6, the insertion piece 30 is inserted into the insertion recess 20 and the engagement projection 21 at the lower end of the stop piece 22 is engaged with the edge portion (inner edge portion, side edge portion, etc.) 40 of the engagement opening 32. Since they are in the combined state, the pressing piece 31 can elastically expand with the engaging portion 41 of the engaging opening and the engaging projection as the fulcrum. Therefore, when the leg member 3 in the lying state (folded state) is raised, the pressing piece 31 elastically presses the first pressing surface 26 of the connecting piece 17, and the leg member 3 is in the standing state. Fixed in. In particular, when the pressing piece 31 is provided with an abutting protrusion 36 that can abut against the inner side surface 33 that is continuous with the first pressing surface 26, the connecting member and the engaging protrusion are engaged with each other, so that the leg member is engaged. The standing and fixed state of is extremely stable. When engaging the engaging projection of the stopper with the inner edge of the engaging opening, the engaging portion effectively resists elastic expansion of the pressing piece. Therefore, a reliable and stable elastic pressing force can be obtained.

In the case where the pressing piece 31 is provided with the contact projection 36, when the first pressing surface 26 and the second pressing surface 28 are continuous via the connecting surface 29 which is a substantially flat surface, the pressing state is in a laid state. When a leg member 5 is erected, the abutment protrusion 36 relatively moves the connecting surface 29 in a state where the pressing piece 31 does not spread so much, so that the leg member can be naturally erected. .

When the leg member 3 in the upright state is brought to the lying state, the pressing piece 31 elastically presses the second pressing surface 28 of the connecting piece 17, and the leg member 3 is in the lying state. Fixed. When the pressing piece 31 is provided with the abutting projection 36 and the pressing piece 31 has the grip portion 37, for example, the table 5 is turned upside down and the grip portion 37 is lifted to make the pressing piece 31 elastic. By unfolding it, the connection between the connecting piece 17 and the contact projection 36 can be easily released, and the leg member can be laid down.

[0019]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, the undulation restricting device 1 according to the present invention is a table 5 in which leg members 3 and 3 are provided at both ends in a longitudinal direction of a lower surface portion of a top plate 2 having a rectangular plate shape. The leg member 3 is held by the L-shaped leaf spring 6 in the upright state and the fallen state (folded state).

The table 5 is provided at both end portions of a lower surface recess 11 of a top plate body 10 which is provided with a hanging wall 9 on the lower peripheral edge of the mounting plate 7, and at a short side edge of the top plate body 10. U-shaped holding frames 15 and 15 formed by bending and forming bent pieces 13 and 13 that are bent along the long side edges at both ends of a central piece 12 extending along the lower side are provided.

In the leg member 3, the base end portions of the left and right leg pieces 16, 16 are connected to each other by a connecting piece 17 having a rectangular tube shape, and the base end portions 19, 19 of the leg pieces 16, 16 are connected to each other. It is pivotally attached to the bending pieces 13, 13. The leg member 3 is folded up on the lower surface of the placing plate 7 in a standing state (FIG. 2) in which the connecting piece 17 of the leg member 3 rotates about the axis line and stands upright at a right angle to the placing plate 7. It is possible to take a fallen state (Fig. 3).

Further, as shown in FIGS. 4 to 5, the dovetail-shaped insertion is formed in the central outer surface portion of the central piece 12 of the holding frame 15 such that the groove width is opened downward and the groove width becomes smaller toward the upper side. The recess 20 is provided, and the inner surface of the central piece facing the central portion in the width direction of the insertion recess 20 protrudes slightly downward from the lower end of the central piece and engages with the engaging projection 21 on the inner side of the lower end. A stop piece 22 provided with is projected. The engaging projection 21 is formed in a saw-tooth shape in which a horizontal step portion 24 is continuously provided on an upper end of a slope portion 23 that is inclined upward inward (inward in the top plate length direction). .

Further, a first pressing surface 26 is provided on the inner side of the central portion of the lower surface portion 25 of the connecting piece 17 of the standing leg member 3, and the lower surface portion 27 of the connecting piece 17 of the lying leg member 3 is provided. A flat second pressing surface 28 is provided on the outer side of the central portion, and the first pressing surface 26 and the second pressing surface 28 are continuous via a connecting surface 29 which is a substantially flat surface. is doing. In FIG. 5, the connecting piece 17 shown by the solid line is the standing leg member, and the connecting piece 17 shown by the alternate long and short dash line is the lying leg member.

The L-shaped leaf spring 6 is formed such that its width becomes narrower toward the upper side, and the insertion piece 30 to be inserted into the dovetail-shaped insertion recess 20 and the retainer capable of engaging with the connection piece 17 are provided. The piece 31 is connected to the base end thereof at a substantially right angle (in the present embodiment, an angle slightly smaller than the right angle, for example, an angle smaller than about 1 degree), and is formed as an L-shaped plate body having a spring property. , Which are integrally formed of, for example, ABS resin. At the center of the base end side portion of the pressing piece 31, there is provided a rectangular engaging opening 32 through which the engaging projection 21 at the lower end of the stopper piece is inserted. In addition, as shown in FIGS. 4 and 6, the upper surface of the pressing piece 31 near the tip end is connected to the above-mentioned first pressing surface 26 of the connecting piece 17 of the leg member 3 in the upright state. A contact protrusion 35 that can contact the inner side surface 33 is provided, and a portion that protrudes inward from the corresponding contact protrusion 35 is a handle portion 37. In addition, a plurality of stiffening ribs 39 are provided on the lower surface of the pressing piece 31 so as to be located on both sides of the engagement opening 32 and extend in the length direction of the pressing piece.

Then, the insertion piece 30 of the L-shaped leaf spring 6 is inserted into the insertion recess 20, and the engaging projection 21 of the stop piece 22 is placed at the entrance of the engaging opening 32. As shown in FIG. 6, when the inner edge portion of the engaging opening 32 is guided by the inclined surface portion 23 of the engaging protrusion 21 of the stopper 22, the engaging protrusion 21 is pressed toward the upper surface side of the engaging protrusion 21. Is inserted through the engagement opening 32, and finally the horizontal step portion 24 of the engagement projection 21 is engaged with the lower surface of the inner edge portion 40 of the engagement opening 32, as shown by the chain line in FIG. The L-shaped leaf spring 6 is firmly fixed to the lower surface portion of the top plate 2. Then, the pressing piece 31 can elastically expand in the table-lower direction with the engaging portion 41 between the engaging opening and the engaging protrusion as a fulcrum.

When the leg member 3 is in the laid-down state shown in FIG. 3, as shown in FIG. 8, the abutting protrusion 35 of the pressing piece 31 has an outer edge portion of the connecting surface 29 provided in the central portion of the connecting piece. And is in a close condition. In this state, when the leg member 3 is rotated in the upright direction as shown by the arrow F in FIG. 9, the contact projection 35 relatively moves the connecting surface 29, and the aforesaid outer edge portion of the connecting surface causes the contact protrusion 35 to move. After riding on the first pressing surface 26, it abuts against the inner side surface 33 as shown in FIG. 7, and the abutting projection 35 and the connecting piece 17 are brought into an engaged state. The standing state of is fixed.

After that, in order to lay down the leg members 5, for example, the table 3 is turned upside down, and the handhold portion 37 is lifted as shown by a chain line in FIG. This is performed by releasing the engagement between the portion 35 and the inner surface portion 33. When the leg member 3 is in the laid state, the pressing piece 31 elastically presses the second pressing surface 27 via the contact protrusion 35 as shown in FIG. Fixed.

When the spring action of the L-shaped leaf spring is deteriorated, the replacement is performed by elastically bending the lower end portion of the stop piece 22 outward as shown by the alternate long and short dash line in FIG. After releasing the engagement between 21 and the inner edge portion 40, the insertion piece 30 is pulled out from the insertion recess 20. As described above, the engagement opening 32 is formed to have a narrower width toward the upper end, and the insertion piece 30 is also formed narrower toward the upper end as described above, so that the insertion piece can be easily removed. It

FIG. 10 shows that the insertion piece 30 of the L-shaped leaf spring 6 is inserted into the insertion recess 20 formed as a downwardly opened hole, and the engagement projection of the stop piece 22 is inserted in the same manner as in the above embodiment. The state where the portion 21 is engaged with the inner edge portion 40 of the engagement opening 32 is shown. In this embodiment, the pressing piece 31 elastically presses the second engaging surface 28 of the connecting piece 17 in a surface contact state, so that the leg member 3 is fixed in a lying state.

In the present invention, the L-shaped leaf spring may be formed by bending a metal plate. Also, by changing the width of the L-shaped leaf spring, the spring resistance can be set as required according to the type of table.

[0031]

EFFECTS OF THE INVENTION The present invention has the following excellent effects. The undulation regulating device according to the present invention regulates the undulation of the leg member by using an L-shaped leaf spring fixed to the end of the lower surface of the top plate by engaging with the stopper. Therefore, unlike the conventional device in which the pressing force is weak due to the long length of the wing pieces, the leg member is securely placed in the collapsed state and the standing state in which it is folded by the strong elastic pressing force of the L-shaped leaf spring. Can be fixed. Particularly, it is preferable to connect the insertion piece and the pressing piece at an angle slightly smaller than a right angle because the spring action of the L-shaped leaf spring can be further improved.

The L-shaped leaf spring can be easily removed by releasing the engagement between the engaging projection of the stopper and the edge of the engaging opening. Further, after inserting the insertion piece into the insertion concave portion, the L-shaped leaf spring can be easily mounted by hitting the pressing piece toward the table top surface with a hand or the like. For this reason, no special technique is required to replace the L-shaped leaf spring, and therefore even an amateur can easily replace it. Further, unlike the conventional device in which the blade member after replacement is likely to become unstable due to the loosening of the screw, the L-shaped leaf spring after replacement also continues to exert a reliable elastic pressing force. Therefore, it is possible to avoid the uneconomical situation in which the entire table becomes unusable due to damage to the undulation limiting device.

When engaging the engaging projection of the stopper with the inner edge of the engaging opening, the engaging portion effectively resists elastic expansion of the pressing piece. Therefore, a reliable and stable elastic pressing force can be obtained.

When the pressing piece is provided with an abutting protrusion capable of abutting the inner side surface connected to the first pressing surface, the leg member is erected because the engaging action of the connecting piece and the engaging protrusion is added. The fixed state becomes extremely stable.

Since the mounting structure of the L-shaped leaf spring that constitutes the up-and-down regulating device is simple, the work of assembling the table can be made efficient, and the manufacturing cost can be reduced.

The space under the table is in a completely open state, unlike a conventional table including a wing member and a pedestal. Therefore, when a leg gets tired at a banquet, sitting work, etc., the leg can be freely extended to the lower space to relax.

[Brief description of drawings]

FIG. 1 is a perspective view showing a desk to which the present invention is applied.

FIG. 2 is a perspective view showing a desk to which the present invention is applied in a state where leg members are upright.

FIG. 3 is a perspective view showing a desk to which the present invention is applied in a state in which the leg members are lying down.

FIG. 4 is a perspective view illustrating an L-shaped leaf spring, an insertion concave portion of a leg member connecting piece to which the L-shaped leaf spring is attached, and a stopper.

FIG. 5 is a perspective view illustrating a configuration of a stop piece and a connecting piece.

FIG. 6 is a cross-sectional view illustrating a mounting procedure of an L-shaped leaf spring.

FIG. 7 is a cross-sectional view showing a state in which the leg member is fixed in a standing state by an L-shaped leaf spring.

FIG. 8 is a cross-sectional view showing a state in which the leg member is fixed in a lying state by an L-shaped leaf spring.

FIG. 9 is a cross-sectional view showing a state in which the leg member is being rotated in the standing direction.

FIG. 10 is a cross-sectional view showing another example of a configuration of an L-shaped leaf spring and a mounting mode thereof.

FIG. 11 is a perspective view illustrating a conventional desk having a configuration in which a wing member having a spring property is used to regulate the ups and downs of the leg members.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ups and downs regulating device 2 Top plate 4 Table 5 Leg member 6 L-shaped leaf spring 16 Leg piece 17 Connecting piece 20 Insertion recess 21 Engagement protrusion 22 Stop piece 26 First engagement surface 28 Second engagement surface 30 Insertion Piece 31 Presser piece 32 Engagement opening 33 Inner side surface 36 Abutting projection piece 37 Hand-holding part

Claims (6)

[Scope of utility model registration request] 1. The left and right leg pieces (16, 16) are connected to each other at both ends in the longitudinal direction of the lower surface of the top plate (2) by connecting pieces (17) along the edge of the top plate. In a table provided with the leg member (3) so that the connecting piece (17) is rotated around its axis to rise and fall, the inserting piece (30) and the pressing piece (31) are substantially perpendicular at their base ends. The insertion piece (30) of the L-shaped leaf spring (6), which is integrally connected to the pressing piece (31) and is provided with an engaging opening (32) at the base end side portion of the pressing piece (31). ) Projecting inward in the lengthwise direction of the top plate, insert it into a downwardly opened insertion recess (20) provided at the end of the bottom face part of the top plate, and at the end of the bottom face part of the top plate. Engagement protrusion (21) bulged at the lower end of a stopper (22) protruding downward
To the edge portion (33) of the engagement opening (32), and the pressing piece (31) is provided on the lower surface portion (25) of the connecting piece of the leg member in the upright state. Pressing surface (2
6) and the lower surface portion (2) of the connecting piece of the leg member in the lying state.
An apparatus for restricting ups and downs of a leg member in a table, characterized in that the second pressing surface (28) provided in 7) is elastically pressed to thereby fix the leg member in an upright state and a fallen state. . 2. The undulation restricting device for a leg member of a table according to claim 1, wherein the lower end of the stopper (22) projecting downward at the end of the lower surface of the top plate is in the length direction of the top plate. The engagement protrusion (21) bulged inward is engaged with the inner edge (33) of the engagement opening (32) in the top plate length direction, and the pressing piece (31) is The first pressing surface (2) provided on the lower surface (25) of the connecting piece of the leg member in the upright state.
6) and the lower surface portion (2) of the connecting piece of the leg member in the lying state.
An apparatus for restricting ups and downs of a leg member in a table, characterized in that the second pressing surface (28) provided in 7) is elastically pressed to thereby fix the leg member in an upright state and a fallen state. . 3. The front side portion of the pressing piece (31) is in contact with a substantially vertical inner side surface (33) of the connecting piece of the leg member in the upright state, which is continuous with the first pressing surface (26). The leg restraint device for a desk member according to claim 1, further comprising an abutting protrusion (36). 4. The first pressing surface (26) is provided on an inner side of the lower surface portion (25) of the connecting piece in the top plate length direction, and the second pressing surface (28) is provided on the connecting piece. The first pressing surface (26) and the second pressing surface (28) are provided on the outer side in the length direction of the top plate of the lower surface part (27), and the connecting surface (29) is a substantially flat surface. The undulation restricting device for a leg member in a desk according to claim 3, wherein the undulating restricting device is continuous through the. 5. The leg member for a desk according to claim 3, wherein the pressing piece (31) has a handle portion (37) protruding inward in the length direction of the top plate from the abutting protrusion (36). Ups and downs control device. 6. The insertion piece (30) and the pressing piece (31) are
The connection is made at an angle slightly smaller than a right angle,
The undulation restricting device for a leg member in a table according to 2, 3, 4 or 5.