JP4332197B1 - Table and table leg support structure - Google Patents

Abstract

A foldable leg attached to a lower surface of a table is completely fixed in a standing state or a folded state, and in particular, a space between the table and the table is not changed at all in a folded state. Thus, to provide a safe leg support structure that prevents a hand from being caught between the leg and the table.
A cam plate integrated with a leg is formed with a first cam surface and a second cam surface against which the stopper abuts, and when the leg is standing on the lower surface of the table, the contact member is When the leg comes into contact with the first contact portion and the stopper comes into contact with the first cam surface so that the leg is fixed on the lower surface of the table and the leg is folded along the lower surface of the table. A table leg support structure in which the leg is fixed in a folded state along the lower surface of the table by the contact member being in contact with the second contact portion and the stopper being in contact with the second cam surface.
[Selection] Figure 1

Description

  The present invention includes a table leg support structure and a leg support structure for supporting the leg so as to be rotatable between a state where the leg is vertically or inclined with respect to the table lower surface and a folded state along the table lower surface. Related to the table.

In the table leg support structure as described above, there is a demand to make the structure portion small and the leg space large to be easy to use. Also, when trying to swing the leg or folding it along the bottom of the table, the operator may feel painful because the hands are caught between the leg support structure and the legs and the table. It is necessary not to do it.
In this regard, in Patent Document 1, the leg can be fixed in a state where the leg is set up, but when the leg is folded, there is a possibility that a hand may be caught between the folded leg and the table.
Similarly, in Patent Document 2, when the legs are upright, the legs are fixed and safe. However, when the legs are folded, a circular engagement member simply enters a part of the legs and the legs are Only a groove for easy stopping is formed. Therefore, in this case, when the force is applied to the leg, the engaging member is easily detached from the groove, so that the leg cannot be completely fixed with the leg folded, and the leg moves unexpectedly. Or dangerous.
In addition, there is a risk of fingers touching the movable part when the leg is folded.
Japanese Patent No. 2734970 Japanese Patent No. 2846864

Accordingly, the present invention has been made in view of the above circumstances, and a first object of the present invention is to fold the foldable leg attached to the lower surface of the table while reducing the structure portion even when the leg is in an upright state. Even if it is in an unsteady state, it is completely firmly fixed, and there is no play, especially in the folded state so that the distance between the table does not change at all and hands are not caught between the leg and the table. It is to provide a safe leg support structure.
In addition, in the case of the foldable legs as described above, there is a risk that a hand may be pinched by a movable part that moves during the folding operation. For this reason, the second object of the present invention is to completely surround the movable part so that the hand is not caught by the movable part in the support mechanism during the operation of standing or folding the legs. It is to provide a safe leg support structure that keeps the hand from getting caught in the movable part.
Furthermore, in the support mechanism as described above, it is usually necessary to provide a support base for rotatably supporting the legs on the lower surface of the table, but such a support base can be adapted to various dimensional changes. Providing a support base is convenient for cost reduction.
Accordingly, a third object of the present invention is to provide a leg support structure that can be applied to a table having various dimensions and can reduce the cost.

In order to achieve the above object, the present invention provides:
A table leg support structure for rotatably supporting between a state where the legs are standing on the lower surface of the table and a folded state along the lower surface of the table,
A cam plate attached to the pivot end of the leg;
A leg support shaft parallel to the lower surface of the table for rotatably supporting the cam plate in a plane perpendicular to the lower surface of the table;
In a leg support structure comprising a leg support for supporting the leg support shaft,
A stopper support shaft that is parallel to the lower surface of the table and is rotatably attached to the leg support;
A stopper fixed to an arm fixed to the stopper support shaft and rotating integrally with the stopper support shaft;
A contact member fixed to the cam plate,
The leg support base is formed with a first contact part and a second contact part with which the contact member abuts in a state where the leg is standing on the table lower surface and a folded state along the table lower surface, and The cam plate is formed with a first cam surface and a second cam surface against which the stopper abuts in a state where the leg is standing on the lower surface of the table and in a folded state along the lower surface of the table. The contact member is in contact with the first contact portion and the stopper is in contact with the first cam surface when standing on the lower surface, and the legs are fixed on the table lower surface, and When the leg is folded along the lower surface of the table, the abutting member comes into contact with the second abutting portion and the stopper comes into contact with the second cam surface, so that the leg is fixed in a folded state along the lower surface of the table. Been It is constructed as a leg support structure of the table that.
In the above invention, the contact member is attached to the cam plate, and the first and second contact portions with which the contact member abuts are formed on the leg support base side. For example, the contact member is the leg support. First and second contact portions that are attached to the base and on which the contact member abuts may be formed on the cam plate side.

Since the present invention is configured as described above, when the leg is standing on the lower surface of the table, the contact member abuts on the first contact portion, and the stopper is the first cam. By abutting on the surface, the legs are firmly fixed in a state where they stand on the lower surface of the table.
Thus, since the cam plate contacts the first contact portion formed on the leg support via the contact member, the leg cannot rotate, and in this state, the first cam plate Since the cam surface abuts against a stopper that cannot be separated from the leg support shaft, the leg cannot be rotated. Therefore, the leg is completely fixed in a standing state, and there is no play.
Further, when the leg is folded along the lower surface of the table, the contact member comes into contact with the second contact part, and the stopper comes into contact with the second cam surface, so that the leg , Fixed in a folded state along the lower surface of the table.
Thus, when the leg is folded along the lower surface of the table, the cam plate comes into contact with the second contact portion formed on the leg support via the contact member. In this state, the second cam surface of the cam plate comes into contact with a stopper that cannot be separated from the leg support shaft, so that the leg is completely firmly fixed in the folded state. There is no backlash. Therefore, when the leg is folded along the table lower surface, the distance between the leg and the table lower surface does not vary, and there is no danger of a hand being caught between the table lower surface and the leg.

Moreover, in such a table support leg, the leg support structure is made compact and the lower the leg space is, the more convenient for the user. For this purpose, it is necessary to reduce the shape of the cam plate and to reduce the distance between the center of the leg support shaft and the point where the cam and stopper come into contact. However, the load applied to the contact surface of the cam and stopper that receives the force applied when the table is used (the force that rotates the legs in the folding direction, the force indicated by the arrow Y1 in FIG. 5) increases in inverse proportion to this distance. Therefore, for compactness, it is advantageous to distribute the load by using two cam plates and two points where the stopper contacts. Furthermore, it is not a structure in which two legs are connected as shown in Patent Document 2, but in the case of a single leg, the force for rotating the leg support shaft in the axial direction (Y2 in FIG. 4). In order to catch this load, the two cam plates should be arranged as wide as possible in the axial direction of the leg support shaft, and the distance between the contact surfaces of the two cam plates and the stopper It is advantageous to set a large value.
In that respect, in the present invention, the cam plate is composed of two parallel cam plates perpendicular to the lower surface of the table as described above, and the leg support is parallel to the two cam plates, and It has a structure in which two cam plates are sandwiched on the inside, which is advantageous for the load as described above.
In addition, a protective cover made of a curved strip is fixed to the rotating end of the leg, and both ends of the protective cover are fixed to the rotating end of the leg. When the legs are formed to have a width substantially equal to the inner space of the support plate and at least the leg support shaft, cam plate, and stopper are included in the curved space, the leg is folded. Even if the lever is rotated by the lever and the cam plate is rotated, these members are surrounded by the protective cover and are not exposed to the outside. Since it cannot be approached, the risk of human hands being caught or trapped in such moving parts is completely avoided.

  If sufficient safety is taken into consideration, the stopper support shaft may also be included in the curved inner space of the protective cover.

The legs must be completely fixed in an upright or folded state. For this purpose, it is necessary to prevent the stopper from coming off the first or second cam surface carelessly. The elastic member for urging the stopper is for this purpose, and the inconvenience of the stopper being removed without permission is avoided.
When the leg in the standing state or the leg in the folded state is folded or stood, it is necessary to rotate the stopper support shaft to release the interference between the stopper and the first or second cam surface. . It is desirable to provide a lever for rotating the stopper support shaft for releasing the stopper. In this case, by operating the lever, the stopper can be removed from the first or second cam surface, and the fixed leg can be freely rotated. In addition, when the lever operation part is located between the two leg support bases, the structure part is compactly packed, the leg space is widened, and it is easy to use.

  In the table using the leg support structure according to the above configuration, the foldable leg attached to the lower surface of the table, which is the subject of the present invention, is completely fixed in its upright or folded state, In the folded state, it is possible to provide a safe leg support structure in which the distance between the table and the table is not changed at all and the hand is not pinched between the leg and the table.

According to the present invention, the foldable legs attached to the lower surface of the table are completely fixed in the upright state or in the folded state, and in particular, in the folded state, there is no gap between the table and the table. It is possible to provide a safe leg support structure that prevents the hand from being caught between the leg and the table without changing.
Further, in the case of the foldable leg as described above, there is a risk that a hand may be pinched by a movable part that moves during the folding operation, but in the present invention, when the leg is stood or folded, To prevent the movable part in the support mechanism from being touched or pinched by completely surrounding the moving member of the support mechanism with a protective cover, the movable part is kept away from the hand and a safe leg. Support structure is provided.
Furthermore, in the support mechanism as described above, it is usually necessary to provide a support base on the lower surface of the table for rotatably supporting the legs. Such a support base can support various dimensional changes. It is convenient for cost reduction to have a stand.
In the present invention, it is possible to provide a leg support structure capable of reducing costs by being applicable to a table having various dimensions.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
1 is an overall perspective view of the leg support structure of the present embodiment, FIG. 2 is a front sectional view of the leg support structure of the present embodiment in a folded state, and FIG. 3 is the leg of the present embodiment. FIG. 4 is a sectional side view of the leg support structure of the present embodiment in which the legs are folded, FIG. 4 is a front sectional view of the leg support structure of the present embodiment in which the legs are upright, and FIG. FIG. 6 is an overall perspective view of the leg support structure of this embodiment, and FIG. 7 is an overall exploded perspective view of the leg support structure of this embodiment.

As shown in FIG. 1, the leg support structure X according to this embodiment has a state in which the leg 1 stands on the lower surface 3a of the table 3 and a folded state along the lower surface 3a of the table 3 as shown in FIG. It can be supported in a freely rotatable manner.
The leg support structure X includes a pair of cam plates 5 and 5 attached to the rotating end of the leg 1.
The cam plate 5 is rotatably supported in a plane perpendicular to the table lower surface 3a by a leg support shaft 7 parallel to the table lower surface.
The leg support shaft 7 is supported by two leg support bases 9, 9 perpendicular to the lower surface of the table.
Therefore, the leg 1 is supported by the two leg support bases 9 and 9 via the cam plate 5 so as to be rotatable about the leg support shaft 7.

  The leg support structure X is further fixed to a stopper support shaft 11 which is parallel to the table lower surface 3a and is rotatably attached to the leg support base 9, and an arm 13 fixed to the stopper support shaft 11. A stopper 15 that rotates integrally with the stopper support shaft 11 is provided.

  Further, the leg support structure X includes a round shaft-shaped contact member 17 fixed to the cam plate 5, and the leg support base 9 is formed with an arc-shaped long hole 19 into which the contact member 17 is inserted. Has been. The arc-shaped long hole 19 is formed in an arc shape centering on the leg support shaft 7. Therefore, when the leg 1 rotates about the leg support shaft 7, the contact member 17 fixed to the cam plate 5 moves along the arc-shaped elongated hole 19 as the cam plate 5 rotates. Moving.

  The end of the arc-shaped elongated hole 19 is in contact with the contact member 17 in a state where the leg 1 is standing on the table lower surface 3a as shown in FIG. 1 and in a state where the leg 1 is folded along the table lower surface as shown in FIG. Constitutes a first contact portion 19a and a second contact portion 19b.

  Further, as shown in FIG. 1, the stopper 15 abuts against the cam plate 5 in a state where the leg 1 is standing on the table lower surface 3a and in a folded state along the table lower surface 3a shown in FIG. A first cam surface 5a and a second cam surface 5b are formed.

  Therefore, when the leg 1 stands on the table lower surface 3a (FIGS. 1, 4 and 5), the contact member 17 comes into contact with the first contact portion 19a, and the stopper 15 is in the first position. By abutting on one cam surface 5a, the leg 1 is fixed in a state where it stands on the table lower surface 3a. In this way, the cam plate 5 abuts against the first contact portion 19a formed on the leg support 9 via the contact member 17, so that the leg 1 cannot rotate counterclockwise in FIG. In this state, the first cam surface 5a of the cam plate 5 contacts the stopper 15 that cannot be separated from the leg support shaft 11, so that the leg 1 cannot be rotated clockwise in FIG. The leg 1 is completely fixed in a standing state.

When the leg 1 is folded along the table lower surface 3a, as shown in FIG. 2, the contact member 17 comes into contact with the second contact portion 19b, and the stopper 15 is The leg 1 is fixed in a folded state along the table lower surface 3a by contacting the second cam surface 5b.
Thus, as shown in FIG. 2, when the leg 1 is folded along the table lower surface 3a, the cam plate 5 is formed on the leg support 9 via the contact member 17. 2 is in contact with the contact portion 19b of the two, the leg 1 cannot be rotated in the clockwise direction in FIG. 1, and in this state, the second cam surface 5b of the cam plate 5 is separated from the leg support shaft 11. The leg 1 cannot rotate in the counterclockwise direction in FIG. Therefore, the leg 1 is completely fixed in the folded state, and no play is generated.

  At this time, the stopper support shaft 11 is constantly urged to rotate counterclockwise in FIGS. 1 and 2 by a vine spring 23 which is an example of an elastic member attached around the stopper support shaft 11. When the leg 1 is in the upright or folded state as described above, the stopper 15 is urged against the first or second cam surface 5a or 5b by being urged by the vine spring 23. (And the leg 1 integral therewith) is prevented from rotating. Therefore, when the leg 1 in the standing state or the leg 1 in the folded state is folded or stood, the stopper support shaft 11 is rotated in the clockwise direction so that the first or second cam surface 5a or 5b. It is necessary to cancel the interference. For this purpose, a lever 25 is fixed to the stopper support shaft 11. By rotating the lever 25, the operator removes the stopper 15 from the first or second cam surface 5a or 5b. The leg 1 fixed as described above can be freely rotated.

The cam plate 5 is composed of two parallel cam plates 5 and 5 perpendicular to the table lower surface 3a as described above, and the leg support bases 9 and 9 are connected to the two cam plates 5 and 5, respectively. In parallel, the two cam plates 5 and 5 are sandwiched inside. In addition, a protective cover 21 made of a curved strip is fixed to the rotating end of the leg 1. The protective cover 21 is fixed to the leg 1 by fixing end portions 21 a and 21 b provided at both ends thereof to the rotating end portion (or the cam plate 5) of the leg 1. The protective cover 21 is formed to have a width substantially equal to the inner space between the two leg support plates 9, 9, and at least the leg support shaft 7, the cam plate 5, and the stopper 15 are curved. Contained in space.
As described above, the protective cover 21 is intended to prevent the hand from touching the movable part of the leg support structure, and itself may contact the movable part. It should be made of a flexible material so that it can bend flexibly.

In such a leg support structure X, as the leg 1 is folded, an operation of rotating the stopper 15 by the lever 25 and an operation of rotating the cam plate 5 occur. There is a possibility that a human hand may be caught or pinched in the turning operation. As described above, the protective cover 21 is placed in the curved internal space of the cam plate 5 and the leg support shaft 7 at the center of rotation. Further, since the stopper 15 is included, these members are not exposed to the outside, and the human hand cannot approach the part, so that the human hand is caught or pinched by such a movable part. The risk of being lost is completely avoided.
Further, as shown in FIG. 1, the operation end portion 25a of the lever 25 is provided between the two leg support bases 9 and 9 so as not to hit the two leg support bases 9 and 9. It is desirable to be in a position where it can be accommodated between the leg support bases 9, 9.

In the above example, the stopper support shaft 11 is not included in the protective cover 21. This is because, in the case of the stopper support shaft 11, it merely rotates around the axis, and the rotation operation range of the lever 25 is narrow, so that the danger due to the rotation is very small. However, if sufficient safety is taken into consideration, the stopper support shaft 11 may also be included in the curved inner space of the protective cover 21, as shown in FIG.
The leg support 9 is composed of two plate-like leg supports 9, 9 that are independently fixed to the lower surface of the table.
In this regard, for example, the leg support base used in the leg support structure disclosed in Patent Document 2 is formed in a U-shaped cross section and is constituted by a plate member integrally formed on the left and right sides. In the support table that supports the table legs, when the size of the leg 1 changes according to the size of the table, the distance between the pair of leg support tables needs to be changed. In the leg support structure described in the above-mentioned Patent Document 1, which is configured as a single body on the left and right, a large number of leg support bases are required, which is one of the causes for increasing the cost.
Further, in the case of such an integral leg support base having a U-shaped cross section, it is necessary to process a hole for mounting the leg support shaft 7 and the like after bending into a U-shape. However, it is extremely difficult to process the U-shaped leg support with high accuracy, and the problem of increased processing costs is also pointed out.
On the other hand, when the pair of leg support bases 9 and 9 are independent from each other like the leg support base 9 used in this embodiment, the distance between them can be freely adjusted. Can flexibly respond to dimensional changes. Further, since the left and right support bases 9 and 9 are independent from each other, drilling can be performed independently, and the processing accuracy of the shaft hole for supporting the leg support shaft 7 and the stopper support shaft 11 is lowered. Absent.
Moreover, in this embodiment, since the leg support bases 9 and 9 are separated into the right and left, the work of attaching the protective cover 21 is easy (before the leg support bases 9 and 9 are assembled to the top plate 3). Assembly time can be shortened and costs can be reduced. Further, when the leg support bases 9, 9 have a U-shaped cross section, in order to assemble the protective cover 21, it is necessary to pass the protective cover 21 through a gap between the U-shaped portion and the leg support shaft. For this reason, skill and time are required for the assembling work, and the shapes of both ends of the protective cover 21 are also restricted. On the other hand, if the leg support bases 9 and 9 are divided into left and right, the shape of both ends of the protective cover that covers the vicinity of the mounting portion of the leg 1 can be freely designed. For example, by making the fixing end 21b of the protective cover 21 (the part indicated by the arrow A in FIGS. 2 and 6) a soft flat surface, the top plate surface is folded when the legs are folded as shown in FIG. It is possible to use a cushion member that prevents damage, reducing the number of members and reducing the cost.
In the above embodiment, the contact member is attached to the cam plate, and the first and second contact portions with which the contact member abuts are formed on the leg support base side. First and second contact portions that are attached to the support base and that contact the contact members may be formed on the cam plate side.
In this case, on the cam plate side, the first contact portion and the second contact portion with which the contact member abuts in the state where the contact member stands on the table lower surface of the leg and the folded state along the table lower surface. And the first cam surface and the first cam surface with which the stopper abuts on the leg support base side in a state where the leg is stood on the lower surface of the table and a folded state along the lower surface of the table. 2 cam surfaces are formed. As a result, when the leg is standing on the lower surface of the table, the contact member is in contact with the first contact portion and the stopper is in contact with the first cam surface, so that the leg is standing on the lower surface of the table. When the leg is folded along the lower surface of the table, the contact member comes into contact with the second contact portion and the stopper comes into contact with the second cam surface. It will be fixed in the folded state along.

  The present invention is applicable to a table leg support structure.

The whole leg support structure perspective view of this embodiment. The front sectional view of the state which folded the leg in the leg support structure of this embodiment. The sectional side view of the state which folded the leg in the leg support structure of this embodiment. The front sectional view of the state where the leg in the leg support structure of this embodiment was stood. The sectional side view in the state where the leg in the leg support structure of this embodiment was stood. The whole leg support structure perspective view of this embodiment. FIG. 2 is an entire exploded perspective view of a leg support structure of the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Leg 3 ... Table 3a ... Table lower surface 5 ... Cam board 7 ... Leg support shaft 9 ... Leg support base 11 ... Stopper support shaft 13 ... Arm 15 ... Stopper 17 ... Contact member 19 ... Arc-shaped long hole 21 ... Protective cover 23 … Very spring (elastic member)
25 ... Lever

Claims (8)

A table leg support structure for rotatably supporting between a state where the legs are standing on the lower surface of the table and a folded state along the lower surface of the table,
A cam plate attached to the pivot end of the leg;
A leg support shaft parallel to the lower surface of the table for rotatably supporting the cam plate in a plane perpendicular to the lower surface of the table;
In a leg support structure comprising a leg support for supporting the leg support shaft,
A stopper support shaft that is parallel to the lower surface of the table and is rotatably attached to the leg support;
A stopper fixed to an arm fixed to the stopper support shaft and rotating integrally with the stopper support shaft;
A contact member fixed to the cam plate,
The leg support base is formed with a first contact part and a second contact part with which the contact member abuts in a state where the leg is standing on the table lower surface and a folded state along the table lower surface, and The cam plate is formed with a first cam surface and a second cam surface against which the stopper abuts in a state where the leg is standing on the lower surface of the table and in a folded state along the lower surface of the table. The contact member is in contact with the first contact portion and the stopper is in contact with the first cam surface when standing on the lower surface, and the legs are fixed on the table lower surface, and When the leg is folded along the lower surface of the table, the abutting member comes into contact with the second abutting portion and the stopper comes into contact with the second cam surface, so that the leg is fixed in a folded state along the lower surface of the table. Been Leg support structure of the table that. A table leg support structure for rotatably supporting between a state where the legs are standing on the lower surface of the table and a folded state along the lower surface of the table,
A cam plate attached to the pivot end of the leg;
A leg support shaft parallel to the lower surface of the table for rotatably supporting the cam plate in a plane perpendicular to the lower surface of the table;
In a leg support structure comprising a leg support for supporting the leg support shaft,
A stopper support shaft that is parallel to the lower surface of the table and is rotatably attached to the leg support;
A stopper fixed to an arm fixed to the stopper support shaft and rotating integrally with the stopper support shaft;
A contact member fixed to the leg support,
The cam plate is formed with a first contact portion and a second contact portion with which the contact member abuts in a state where the leg is standing on the lower surface of the table and a folded state along the lower surface of the table. The leg support is formed with a first cam surface and a second cam surface against which the stopper abuts in a state where the leg is standing on the lower surface of the table and in a folded state along the lower surface of the table. The contact member is in contact with the first contact portion and the stopper is in contact with the first cam surface when standing on the lower surface, and the legs are fixed on the table lower surface, and When the leg is folded along the lower surface of the table, the abutting member comes into contact with the second abutting portion and the stopper comes into contact with the second cam surface, so that the leg is fixed in a folded state along the lower surface of the table. Been Leg support structure of the table that.   The cam plate is attached to the pivot end of the leg, and is composed of two parallel cam plates perpendicular to the lower surface of the table, and the leg support is parallel to the two cam plates, and 3. The table leg support structure according to claim 1, comprising two support plates sandwiching two cam plates inside.   The leg further includes a protective cover which is fixed at both ends to the pivot end of the leg and is formed of a curved strip having a width substantially equal to the interval between the two support plates. The protective cover includes at least the leg The table leg support structure according to claim 3, wherein the support shaft, the cam plate, and the stopper are included in the curved space.   5. The table leg support structure according to claim 4, wherein the protective cover further includes the stopper support shaft in the curved space.   The table leg support structure according to any one of claims 1 to 5, wherein each of the leg support bases is formed of a plate-like member that is independently fixed to the lower surface of the table. An elastic member that elastically biases the stopper in a direction that always engages the first and second cam surfaces;
And a lever fixed to the stopper support shaft for rotating the stopper in a direction for detachment from the first or second cam surface against the urging force of the elastic member. The table leg support structure according to any one of claims 1 to 6, wherein the portion is located between the two leg support bases.   The table provided with the leg support structure of the table in any one of Claims 1-7.

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