JPH0454905A - Securing mechanism for leg of table, raised of laid - Google Patents

Abstract

PURPOSE:To accomplish erecting or lowering hold of table leggs while inhibiting the breakage of the mechanism with a swaying member by engaging one end of an engaging member with a connecting rod when erecting and raising a table leg and by relieving the erection holding state with the swaying member when lowering down the table leg to attain the lowering hold of the table leg with an energizing means to energize to the rear side of the surface plane of the chair. CONSTITUTION:When erecting a leg 6, the end of a swaying member 14 is energized in the direction of contacting the rear surface 4a of a plane member 4 to firmly hold a engaging state of an engaging fixture 18 at the end of the swaying member 14 toward a connecting rod 10. When lowering the leg 6, a relieve operating part 26 is pressurized to the rear side 4 of the plane member 4 against the energizing force of a coil spring 22-1, 22-2. Then the end of the swaying member 14 is pulled to the direction of separating from the rear side 4a of a plane member at the end of swaying member 14 to relieve the engagement of the engaging fixture 18 having a cross section of reverse U-configuration and the connecting rod 10 n the erecting and lowering hold mechanism 12. Then, at the time of relieving the engagement, the connecting rod 10 can easily be relieved with a slanting part 24. At this point, the swaying angle of the swaying member 14 is inhibited with a breakage inhibiting part.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a mechanism for maintaining the table legs in the upright position, and in particular, a mechanism for maintaining the table legs in the down position when the table is lifted up with the face plate facing up when the table is down. This invention relates to a mechanism for holding table legs up and down, which firmly holds the table legs upright when standing up.

[Prior Art] In general, a so-called desk, such as a table, is composed of a face plate and a plurality of legs attached to the back side of the face plate. There are various types of tables that have legs that can be folded for convenience when not in use. In a table with foldable legs, the legs are attached to the back of the face plate by hinges or spring-loaded hinges, and are further equipped with a mechanism for raising and lowering the legs, a locking mechanism, etc. to maintain the legs in the upright and laid down states. It is something.

[Problems to be Solved by the Invention] By the way, in the conventional mechanism for raising and lowering table legs, a connection bar that connects the legs in an H-shape has an inverted U-shaped cross section at one end of the swinging member. Some devices maintain the erect state of the legs by engaging the engaging portions.

That is, when raising the leg, the leg is manually raised and the connecting bar is engaged with the engaging portion at the tip of the swinging member to lock the leg.

In addition, when lowering the legs from the standing position, manually lift the distal end of the swinging member, disengage the engagement part from the connecting bar, and release the locked state of the legs. It enables lodging motion.

However, since the rocking rotation of the swinging member tip is not suppressed when disengaging the locking mechanism, when the swinging member tip is manually lifted directly, the elastic deformation limit of the biasing mechanism is There is a danger that it will be lifted by an amount that exceeds that amount.

As a result, the biasing mechanism is plastically deformed, and the locking mechanism that maintains the legs in the erected and fallen states is damaged, resulting in the inconvenience that the table legs cannot be reliably maintained in the erected or fallen state.

[Purpose of the Invention] Therefore, in order to eliminate the above-mentioned inconvenience, an object of the present invention is to provide a connecting bar between the legs, so that the engaging portion at one end engages with the connecting bar to maintain the standing state of the leg, and the other end A swing member is provided that has a damage prevention function that prevents damage by abutting against the back of the table's face plate, and one end of the swing member is urged against the back of the table's face plate to control the legs in the upright and fallen states. The mechanism is prevented from being damaged by the swinging member by providing a biasing means for firmly holding the device and providing a release operation portion for releasing the fixed state by the swinging member against the biasing force of the biasing member on the swinging member. To realize a table leg raising/holding mechanism which can securely maintain the table legs standing up or falling down.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a mechanism for maintaining the table legs raised and lowered, which are pivotally supported on the back surface of the table face plate so that they can be raised and lowered. In the mechanism, a connecting bar is provided between the legs, and the engaging part at one end engages with the connecting bar to maintain the standing state of the leg, and the other end portion comes into contact with the back surface of the table face plate to prevent damage. A swinging member having a damage prevention function is provided, and a biasing means is provided for urging one end of the swinging member toward the back side of the face plate of the table to maintain the legs in an upright state and a collapsed state, and the swinging member The present invention is characterized in that a release operation section is provided that releases the state held firmly by the swinging member against the urging force of the urging means. In addition, in the table leg raising/holding mechanism that maintains the standing and falling states of the legs that are pivotably supported on the back surface of the table face plate, connecting bars are provided between the legs, and connecting bars are provided at one end of the legs. Each swing member is provided with a damage prevention function in which the engaging portion engages to maintain the standing state of the leg and the other end portion contacts the back surface of the face plate of the table to prevent damage, and one end side of the swing member is provided. is provided with a biasing means for biasing the leg toward the back side of the face plate of the table to firmly maintain the legs in an upright state and a collapsed state, and the swinging member is released from the fixed state held by the swinging member against the biasing force of the biasing means. The present invention is characterized in that it is provided with a release operation section that connects the connecting bars, a motion transmitting means that connects the connecting bars, and an operating rod that connects the rear end portions of the swinging member.

[Operation] By having the structure as described above, when the table legs are raised up, the engaging portion at one end is engaged with the connecting crosspiece, thereby ensuring that the table legs are maintained in the upright position, and when the table legs are brought down,
The release operation part is pressed to release the standing state maintained by the swinging member, and the legs are maintained in the down position by the urging means that urges the back side of the face plate of the table.

[Examples] Examples of the present invention will be described in detail below based on the drawings.

1 to 5 show a first embodiment of the invention.

In Figure 2.3, 2 is a table.

This table 2 is composed of a face plate 4 and table legs (hereinafter simply referred to as "legs") 6.

That is, on the back surface 4a of the face plate 4, there are four legs 6-1.
．． 6-2 (in Fig. 2.3, the left leg portion of the face plate 4 is formed symmetrically with the right leg portion, and the explanation is omitted) is attached to the face plate 4 by the hinge 8-1.8-2. They are attached so that they can be folded inward toward the center.

Between the legs 6-1 and 6-2, that is, between the legs 6-1 and 6-2
A connecting beam 10 is provided to connect the bases of the two in a figure-eight shape.

The connecting beam 10 is provided with a lifting/lowering holding mechanism 12. In other words, one end of the leg 6-1 is engaged with the connecting bar 10.
．． A linear swinging member 14 is provided to maintain the upright state of 6-2. This swinging member 14 has its swing center at a position moved toward the center by about 1/3 of the length of the swinging member 14 from the other end, and has a holding portion 16 attached to the back surface 4a of the face plate 4. held by.

Further, the leg 6 is engaged with the connecting bar 10 at the tip of the swinging member 14.
-1.6-2 is provided with an engaging fitting part 18 which is an engaging part having an inverted U-shaped cross section to maintain the upright state, and the swinging member 1
A damage prevention part 20 is formed at the other end of the rear end of the locking mechanism 4, which comes into contact with the back surface 4a of the face plate 4 when the engagement of the engagement fitting part 18 is released, and prevents damage to the tilting and holding mechanism 12. The holding portion 16 includes a biasing means for biasing the tip of the swinging member 14 in a direction to approach the back surface 4a of the face plate 4 to maintain the upright and fallen states of the legs 6-1, 6-2, for example. Two coil springs 22-1 and 22-2 are stretched.

More specifically, as shown in FIGS. 1 to 5, the raising/lowering holding mechanism 12 includes the swinging member 14, an engaging metal part 18 having an inverted U-shaped cross section, a damage prevention part 20, and a coil spring 22-1. .22-
2, and the legs 6-
Maintains L 6-2's standing and lying states.

In addition, in order to securely maintain the raising leg through the connecting bar 10 at the tip of the swinging member 14, a locking operation to the engaging fitting part 18 and a disengaging operation from the engaging fitting part 18 are performed. A sloped portion 24 is formed to make the process smooth.

Furthermore, two coil springs 22 are provided at the rear end of the swinging member 14.
A release operation section 26 is provided that releases the fixed state held by the swinging member 14 against the biasing force of -L 22-2.

Next, the effect will be explained.

When the legs 6 are erected, as shown in FIG. 1, the tip of the swinging member 14 is urged in the direction of approaching the back surface 4a of the face plate 4 by the urging force of the coil spring 22-L 22-2, and the connecting frame is The engagement state of the engagement fitting part 18 at the tip of the swinging member 14 to the swing member 10 is made firm.

When the legs 6 in the standing state are to be laid down, the third
As shown in the figure, the release operation section 26 is connected to the coil spring 22-L.
22-2 against the back surface 4a of the face plate 4, and pull the tip end of the swinging member 14 away from the back surface 4a of the face plate 4, so that the cross section of the tilting and holding mechanism 12 is inverted U-shaped. The state of engagement between the shaped engagement fitting part 18 and the connecting bar 10 is released. Further, when the connection is released, the connecting bar 10 is easily released by the slope portion 24.

At this time, the swinging angle of the swinging member 14 is suppressed by the damage prevention part 20, and the distance that the tip side of the swinging member 14 is separated from the back surface 4a of the face plate 4 is set by the coil spring 22-1.22.
-2 elastic deformation limit.

After the locking of the engaging fitting part 18 is released, the leg 6 is manually rotated in the direction of collapse, that is, in the direction A in FIG. The swinging member 14 is urged in a direction toward the back surface 4a of the leg 4, and as shown in FIG. In other words, even if the table shown in Fig. 5 is turned upside down and the legs are bent under the face plate, and the table is lifted to move the table, the tips of the legs will not move away from the back of the face plate due to the weight of the legs and will not wobble. There is.

Furthermore, when raising the legs 6 from the collapsed state, if the legs 6 are grasped and rotated in the standing direction, that is, in the direction B in Fig. 4,
Coil spring 22-L presses the connecting bar 10 or the swinging member 14 in the direction of separating it from the back surface 4a of the face plate 4 against the biasing force of the coil spring 22-2, and the connecting bar 10 moves the inside of the swinging member 14 toward the tip side. When the connecting bar 10 passes through the slope part 24 and the leg 6 stands up, the engagement fitting part 18 at the tip of the swinging member 14 engages with the connecting bar 10, and the raising and holding mechanism 12 functions to raise the leg. 6. Maintaining a standing position is accomplished.

As a result, the swinging range of the tip of the swinging member 14 is suppressed by the damage prevention part 20 at the rear end of the swinging member 14 when the locking release operation of the engagement fitting part 18 of the tilting and holding mechanism 12 is performed.
Even if the tip of the swinging member 14 is manually lifted directly, it cannot be lifted by an amount exceeding the elastic deformation limit of the coil spring 22-L 22-2, and the coil spring 22
- 1.22-2 plastic deformation can be reliably prevented, and the table legs can be surely maintained in the standing or falling position without damage to the lifting and holding mechanism 12 that maintains the standing and falling states of the legs 6. .

Further, since the damage prevention portion 20 does not unnecessarily hinder the operation of raising or lowering the table legs, operability can be maintained well, which is advantageous in practice.

Furthermore, since the coil spring 22-L 22-2 biases the tip of the swinging member 14 in the direction of approaching the back surface 4a of the face plate 4, the leg 6 is not supported when the tilting and holding mechanism 12 is released. Note: Once the lodging operation is performed, the subsequent lodging operation can be performed by the urging force, and a rounded bulge portion 25 is formed slightly toward the holding portion 16 side from the slope portion of the swinging member 14 toward the face plate side. If provided, the connecting bar will be connected to the bulge 2 when the leg is raised.
If you move it to a position slightly beyond the apex of 5, connecting bar 1
The leg can be automatically raised by being pushed by the above-mentioned urging force, and the engagement fitting 18 can be engaged to complete the leg raising, and the leg can be easily lowered and raised with a light operation. This can improve usability.

Furthermore, by forming the release operation section 26 at the rear end of the swinging member 14, the release operation can be easily performed using the lever principle using the holding section 16 as a fulcrum, and the operation for lowering the leg can be quickly accomplished. , which is advantageous in practice.

6 to 8 show a second embodiment of the invention.

In this second embodiment, parts that perform the same functions as those in the first embodiment described above will be described with the same reference numerals.

The feature of this second embodiment is that the rear end side of the swinging member 30 is bent so as to be separated from the back surface 4a of the marking plate 4.

That is, as shown in FIG.
The length of the release operation part 34 formed on the rear end side is increased.

Further, as shown in FIG. 8, the rear end side and the distal end side of the swinging member 30 do not protrude from the leg 6 when the leg 6 is collapsed, and when stacking It is bent to the extent that it can be conveniently transported.

In this way, when the leg 6 is to be lowered, the rear end side of the swinging member 30 having a large length can be operated, and even women and girls can easily perform the lowering operation without using any force. ,
Usability can be improved.

Further, similarly to the first embodiment, the swinging member 3 when performing the disengagement operation of the mechanism by the rear end side of the swinging member 30
By suppressing the swinging range of the tip of the swinging member 30, even if you manually lift the tip of the swinging member 30 directly, it can be lifted by an amount that exceeds the elastic deformation limit of the coil spring. Deformation can be reliably prevented, the mechanism for maintaining the erected and fallen states of the legs will not be damaged, and the table legs can be reliably maintained in the erected or fallen state.

Furthermore, by biasing the tip of the swinging member 30 in the direction of approaching the back surface 4a of the face plate 4 by the coil spring and by providing the bulging portion 25, the mechanism for holding the leg upright can be released. If the legs are allowed to fall down or raise the legs, the subsequent act of lodging or raising the legs can be performed using a biasing force, and the lowering of the legs or the eight-leg operation can be performed reliably and easily with a light force. , which can improve usability.

Furthermore, as in the first embodiment, since the release operation section is formed at the rear end of the swinging member 30, the release operation can be easily performed using the lever principle, and the lowering operation of the legs can be quickly accomplished. Therefore, it is practically advantageous.

9 to 11 show a third embodiment of the invention.

The feature of this third embodiment is that a first coil spring 44 is stretched between the swinging member 40 and the holding part 42, and a second coil spring 48 is stretched between the connecting bar 46 and the holding part 42. It is in the point set.

That is, one end of the second coil spring 48 is connected to the connecting bar 46 in order to bias the leg 6 inward of the back surface 4a of the face plate 4.

Then, when the rear end of the swinging member 40 is pressed to release the engagement when the leg 6 is operated to fall down, the leg 6 is automatically moved down by the biasing force of the second coil spring 48, and the leg 6 is allowed to fall down. Operations can be performed with one touch.

Further, as in the first and second embodiments described above, the swinging member 4
Since the swinging range of the tip of the swinging member 40 is suppressed by the rear end of the mechanism when releasing the mechanism, even if the tip of the swinging member 40 is directly lifted manually,
The first coil spring 44 cannot be lifted by an amount that exceeds its elastic deformation limit, and plastic deformation of the first coil spring 44 can be reliably prevented, and the mechanism for maintaining the erected and fallen states of the legs will not be damaged. , can reliably stand up or fall down on the table leg.

Furthermore, since the first coil spring 44 biases the tip of the swinging member 40 in the direction of approaching the back surface 4a of the face plate 4, if the leg is moved to fall down when the mechanism is released, then The first coil spring 44 and the second
This can be done by the biasing force of the coil spring 48, and the leg can be easily lowered with a single touch, improving usability.

Furthermore, as in the first and second embodiments described above, by forming the release operation section at the rear end of the swinging member 40, the release operation can be easily performed using the principle of lever, and the lowering operation of the leg can be quickly performed. This is a practical advantage.

Note that this invention is not limited to the first to third embodiments described above, and various applications and modifications are possible.

For example, in the first to third embodiments of the present invention, only the two legs on the right side or the two legs on the left side of the back of the face plate are configured to be raised and lowered at the same time, but as shown in FIGS. -1.50-2, the first and second arm members 54-1, 54-2 forming the motion transmission means 52 and the rotating member 56
and the swinging member 58-L.
It is also possible to configure the rear end portions of each of 58-2 to be connected by an operating rod 60. Further, at the connection site between the first and second arm members 54-1, 54-2 and the rotating member 56,
Operation handles 62-L and 62-2 are provided, respectively.

If one of the two legs on the right side or the two legs on the left side of the back of the face plate is raised, the two legs on the other end will also be raised via the motion transmission rod 52.

Also, if the operating rod 60 of the four standing legs is pressed against the back side of the face plate, the release operating parts 59-1.59-2 of the left and right swinging members 58-1.58-2 are simultaneously pressed, and the gold side Make your legs fall at the same time.

In addition, in FIG. 14, the operation handle 62-1 or 62
- If you hold either one of 2 and move it in the direction of the 8 legs,
It is possible to perform a quick and reliable standing operation such as raising the metal side simultaneously via the motion transmitting means 52, which is advantageous in practice.

Note that the second coil spring 48 is not spaced apart from the connecting bar 46 and the holding part 42, and instead of the holding part, the second coil spring 48 is connected to the back surface of the face plate 4a and the connecting bar 46.
It may be between the legs 6 and the back surface 4a of the face plate. The point is that it is sufficient if it is biased in the direction of falling the leg.

In addition, although the damage prevention part 20 at the other end of the swinging member 14 comes into contact with the back surface of the face plate and fulfills the damage prevention function, for example, it is related to the holding part 16 that supports the swing member 14 instead of the back surface of the face plate. A contact portion may also be provided.

In addition, in the first to third embodiments of the present invention, a release operation portion is provided at the rear end of the swinging member to release the firmly held state by the swinging member against the biasing force of the coil spring.
It is also possible to provide a release operation part on the front end side of the swinging member to an extent that does not protrude more than necessary from the back surface of the face plate, and to release the fixed state by the release operation part on the front end side of the swing member.

[Effects of the Invention] As described in detail above, according to the present invention, a connecting bar is provided between the legs, and the engaging portion at one end engages with the connecting bar to maintain the standing state of the leg, and the other end portion is connected to the table. A swinging member having a damage prevention function that comes into contact with the back side of the table's face plate to prevent damage is provided, and one end of the swinging member is urged against the back side of the table's face plate to maintain the legs in the upright and fallen states. Since the rocking member is provided with a release operation portion for releasing the holding state by the rocking member against the urging force of the urging means, the lifting and holding mechanism is prevented from being engaged by the damage prevention portion of the rocking member. The swinging range of the tip of the swinging member when performing an operation to release the joint is suppressed, and even if the tip of the swinging member is manually lifted directly, it cannot be lifted by an amount that exceeds the elastic deformation limit of the biasing means. The table leg can be reliably prevented from being plastically deformed, and the tilting and holding mechanism that maintains the legs in the standing and falling states will not be damaged, and the table legs can be maintained in the standing or falling position reliably. . In addition, since the damage prevention portion does not unnecessarily hinder the operation of raising or lowering the table legs,
Operability can be maintained well, which is advantageous in practice. Furthermore,
Since the biasing means biases the tip of the swinging member in the direction of approaching the back surface of the face plate, if the legs are caused to fall down when the raising and holding mechanism is released, the subsequent fall down movement is controlled by the urging force. This can be done by , and if you make 8 legs against the biasing force at the time of standing up, and go beyond the point where this biasing force turns the standing leg green, the other leg will automatically move to 8 legs from then on. When you raise it up, the gold side will automatically stand up and maintain its standing position, and if you press the operating rod, you can easily operate the eight legs and lower the legs with a single touch without the metal side falling down at the same time, improving usability. obtain.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, FIG. 1 is an enlarged cross-sectional view of the main part of the mechanism for holding the table leg in the upright state, FIG. 2 is a schematic plan view of the table leg in the upright state, Fig. 3 is a schematic plan view of the table leg in the collapsed state, Fig. 4 is an enlarged cross-sectional view of the main part of the mechanism for holding the table leg in the collapsed state, and Fig. 5 is a main part of the mechanism for holding the table leg in the fallen state. FIG. 6 to 8 show a second embodiment of the present invention, FIG. 6 is an enlarged cross-sectional view of the main part of the mechanism for holding the table leg in the upright state, and FIG. An enlarged cross-sectional view of the main parts of
FIG. 8 is an enlarged cross-sectional view of the main part of the tilting and holding mechanism when the table legs are in a collapsed state. 9 to 11 show a third embodiment of the present invention.
FIG. 0 is an enlarged plan view of a main part of the mechanism for holding the table leg in an upright state, and FIG. Figures 12 to 14 show other embodiments of the invention;
13 is a schematic sectional front view of the table leg in an upright state, FIG. 13 is a schematic sectional plan view of the table leg in an upright state, and FIG. 14 is a schematic sectional plan view of the table leg in a collapsed state. In the figure, 2 is a table, 4 is a face plate, 4a is a back surface, 6 is a table leg (hereinafter simply referred to as "leg"), 8 is a hinge, 10 is a connecting bar, 12 is a tilting/holding mechanism, 14 is a swinging member, 16 is a holding part, 18 is an engagement alloy elevation part, 20 is a damage prevention part, 22 is a coil spring, 24 is a slope part, and 26 is a release operation part.

Claims (1)

[Scope of Claims] 1. In a table leg raising/holding mechanism for maintaining the standing and falling states of the legs that are pivotably supported on the back of the face plate of the table so that they can be raised and lowered, a connecting crosspiece is provided between the legs, and this A swinging member is provided which has a damage prevention function in which an engaging part at one end engages with the connecting bar to maintain the standing state of the leg, and the other end part contacts the back surface of the face plate of the table to prevent damage. A biasing means is provided for biasing one end of the member toward the back side of the face plate of the table to maintain the legs in an upright state and a collapsed state; A mechanism for raising and lowering a table leg, characterized in that it is provided with a release operation part for releasing the fixed state of the table leg. 2. In a table leg raising/holding mechanism that maintains the standing and falling states of the legs that are pivotably supported on the back of the table face plate so that they can be raised and lowered, connecting bars are provided between the legs, and connecting bars are provided at one end of the legs. Each swing member is provided with a damage prevention function in which the engaging portion engages to maintain the standing state of the leg and the other end portion contacts the back surface of the face plate of the table to prevent damage, and one end side of the swing member is provided. is provided with a biasing means for biasing the leg toward the back side of the face plate of the table to firmly maintain the legs in an upright state and a collapsed state, and the swinging member is released from the fixed state held by the swinging member against the biasing force of the biasing means. 1. A mechanism for raising and lowering a table leg, characterized in that a release operation section is provided, a motion transmission means is provided for connecting the connecting bars, and an operating rod is provided for connecting the rear end portions of the swinging members.