JPH0534962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a footboard device suitably used as a study desk or the like.

[Prior Art] Various improvements have been made to study desks and the like so that they can be used for long periods of time by school children who are rapidly growing.

As one of these, a desk has been developed that combines a desk with a height-adjustable footboard installed between the inner walls below the top plate and a chair whose seating height is adjustable. Therefore, if the user is a short child, the footboard of the desk and the seat of the chair should be set at a high position, and the position of the footboard and sitting height can be adjusted as the child grows. I'm starting to do that. That is, according to such a combination, it becomes possible to use a desk with a fixed top plate height without difficulty for everyone from children to adults.

Note that, due to its nature, the footboard is placed on the front side of the desk. Therefore, if this footboard is made into a mere shelf board, this footboard will get in the way, making it possible to store a chair under the top board when the desk is not in use.

Therefore, as an approximation, a pair of rail members is attached to the opposing inner wall surfaces of the desk body so that their vertical positions can be changed, and a footboard is horizontally suspended between the horizontal rail surfaces of these two rail members, and the footboard is placed between the lower surfaces of the footboard. It has been proposed that the front end of the link member is pivotally attached to the position, and the rear end of the link member is pivotally supported in a concave groove that is continuous with the rear end of the rail surface. In addition, in this device, the link member is biased by a torsion coil spring so as to converge near a position orthogonal to the footboard, and the link member is rotated rearward against the biasing force. In this state, the footboard is supported by the rail member. When no load is applied to the footboard, the rear end side of the footboard is held slightly lifted from the rail surface by the biasing force of the spring.

With this configuration, if a chair is inserted under the desk top when the footboard is not in use and the footboard is not in use, the legs of the chair will push the front end of the footboard backwards. I will do it. When the front end of the footboard is pressed rearward, the footboard is held with its rear end floating, and its intermediate position is connected to the rear end of the rail member via a link member. While the front end side slides on the rail surface, the rear end side rises and stands upright. Therefore, the chair can be accommodated under the desk top without being obstructed by the footboard.
Moreover, this footboard does not slide backwards, but instead stands up and retreats, making it possible to use the space behind the footboard as a storage space.

[Problems to be Solved by the Invention] However, in the conventional system, the front ends of the left and right link members are integrally connected, and the rear end of each link member is a free end. Similar issues remain.

That is, with such a configuration, it is difficult to touch the link member from the top side of the footboard or to bias the link member in a desired direction. Therefore, when attaching or detaching the rear end of each link member to the recessed groove, place your hand on the underside of the footboard.
It is necessary to rotate and hold the link member at a required position, which causes a problem of being forced into an extremely unreasonable posture.

Further, the rear end portion of a conventional link member is simply an end portion of a wire rod bent outward, and has a circular cross section. Then, the rear end portion is inserted into and engaged with a recessed groove having a constant width from above. Therefore, if a biased force is applied when the footboard is raised and retracted as described above, the rear end part tends to come off the recessed groove.

The invention according to claim 1 is aimed at solving the above-mentioned problem. Moreover, the invention according to claim 2 aims to solve the above-mentioned problem in addition to the above-mentioned problem.

[Means for Solving the Problems] In order to achieve such objects, the present invention has the following features:
The following configuration is adopted.

That is, the desk footboard device according to the present invention includes a pair of rail members attached to opposing inner wall surfaces of a desk main body, and both ends of the lower surface of these rail members are supported on the rail surfaces to support the two inner wall surfaces. A foot board installed between the two, and a pair of left and right link members whose front end portions are pivoted to an intermediate position on the lower surface side of the foot board, and whose rear end portions are pivoted to a recessed groove provided at the rear end portion of the rail member. The rear end portions of both link members are connected to each other via a connecting rod. In order to make attachment and detachment of the footboard particularly easy, the connecting rod is characterized in that a U-shaped grip portion that can be brought close to the rear end of the footboard is provided in the middle portion of the connecting rod.

Further, in the invention as set forth in claim 2, in order to prevent the footboard from coming off during operation, the left and right link members and the connecting rod are integrally formed with a single wire rod, and the rear end of each link member is The part is made into a flat U-shaped wire rod, and the rear end is provided continuously with the rear end of the rail surface and has an inverted keyhole shape that allows rotation of the rear end only at the bottom. It is made to engage with the part.

[Function] With this configuration, when the footboard is set on the rail member, the connecting rod that connects the rear ends of the link members is located near the bottom of the rear end of the footboard. become. Therefore, when grasping the rear end of the footboard from the top surface side, it becomes possible to grasp the connecting rod as well. By gripping the footboard and the connecting rod together in this way, the link member is held in the rearwardly rotated position, so that the rear end of the link member can be attached to the recessed groove, or removed from the recessed groove. The detachment work can be performed without having to put your hands around the underside of the footboard.

If a U-shaped grip part that can be approached to the rear end of the footboard is provided in the middle part of the connecting rod, even if the rear end of the footboard is casually gripped from the top side, the connecting rod can be held securely. You can hold it. Therefore, it becomes possible to particularly easily attach and detach the rear end portion of the link member to and from the recessed groove.

Furthermore, if the rear end of the link member is made into a U-shaped flattened shape and the concave groove is shaped like an inverted keyhole, the rear end of the link member can be passed through the narrow entrance of the concave groove to the bottom thereof. If the link member is rotated, the rear end will not come out of the recessed groove.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a desk main body 1 and a footboard device 2 attached to the desk main body 1. The footboard device 2 has a symmetrical shape, and has a second
In the figure, the intermediate portion is omitted. This footboard device 2 includes a pair of rail members 3 attached to opposing inner wall surfaces 11 and 12 of a desk body 1.
A foot board 4 is installed between both rail members 3, and a front end 51 is pivotally attached to an intermediate position on the lower surface side of the foot board 4, and a rear end 52 is pivotally supported to the rear end 3a of the rail member 3. It is equipped with link member 5.

The desk body 1 has a top plate 15 installed between the upper ends of left and right side panels 13 and 14, and the height of the top plate 15 cannot be adjusted. One inner wall surface 11 formed by the left side plate 13 and the right side plate 1
A space 17 formed between the sleeve 16 and the other inner wall surface 12 formed by the sleeve 16 provided on the inside of the chair 4 can accommodate the seat and legs 61 of the chair 6 whose seat height is adjustable. A footboard device 2 according to the present invention is provided on the front side of the space 17, and a storage shelf 1 for placing books and the like is provided at the back.
8 are installed.

As shown in FIGS. 2 and 4, the rail member 3 is made of synthetic resin and is elongated from front to back.
a base body 32 attached to the inner surfaces 11 and 12 via
3, and the upper surface of the rib 33 serves as a rail surface 344. A concave groove 35 continuous to the rail surface 34 is provided at the rear end 3a of the rail member 3. The recessed groove 35 has a narrow entrance portion 35a and a bottom portion 3 that is circular in side view.
It has an inverted keyhole shape consisting of 5b. Two screws 31 on the front and back that fix the base 32 of the rail member 3
is adapted to be screwed into an insert nut 36 embedded in the inner wall surfaces 11, 12. The insert nuts 36 are buried in multiple stages at intervals in the vertical direction. By selecting the insert nut 36 to be screwed, the mounting position of the rail member 3 can be changed in stages. The rail surfaces 34 of both rail members 3 are set to be held horizontally no matter where the rail members 3 are attached.

The footboard 4 is rectangular and has a depth that is slightly less than half the depth of the space 17. Both ends 41a of the lower surface 41 are supported by the rail surfaces 34, and the inner wall surfaces 11, It is built between 12 rooms.

The link member 5 is made of, for example, a metal wire, and has a front end 51 bent in the inner case that is pivotally connected to bearings 42 attached to portions near both ends of the lower surface 41 of the footboard 4, and protrudes outward. The rear end portion 52 of the rail member 3 is engaged with the recessed groove 35 of the rail member 3 for pivotal support. The rear end portions 52 of the left and right link members 5 are connected to each other via a connecting rod 7. Specifically, the left and right link members 5 and the connecting rod 7 are integrally formed of a single wire rod, and the rear end portion 52 of each link member 5 is made into a flat U-shaped wire rod. The rear end 52 is engaged with the aforementioned inverted keyhole-shaped concave groove 35 that allows rotation of the rear end 52 only at the bottom 35b. A gripping portion 71 is provided at the intermediate portion of the connecting rod 7. The gripping portion 71 is formed by deforming a member into a U-shape, and when the footboard 4 is installed between the rail members 3, the rear end 44 of the footboard 4 is
It is now possible to get close to FIG. 3 shows the footboard 4 removed from the rail member 3. Therefore, the link member 5 is moved to the neutral position shown by the solid line in FIG.
That is, it is elastically biased so as to converge at a position substantially perpendicular to the footboard 4. The biasing force of the torsion coil spring 53 is selected to such a value that the rear end 44 side of the footboard 4 is slightly raised from the rail surface 34 when the footboard 4 is placed on the rail surface 34. It has been done.

With such a configuration, the footboard 4 is held on the rail surface 34 at a constant angle θ with respect to the link member 5. Therefore, when storing the chair 6 in the space 17 under the top plate of the desk body 1, the legs 61 of the chair 6 can be used to hold the footboard 4.
When the front end 43 of the link member 5 is pressed rearward, the rearward pressing force F acts as a force that lifts the front end 51 of the link member 5 upward. As a result, the front end 43 of the footboard 4 moves rearward along the rail surface 34, and the intermediate portion of the footboard 4 is lifted by the tension of the link member 5 and stands upright. When the pressing force F is released by the chair 6, the footboard 4 is moved to the fourth position by the sling force and gravity that urge the link member 5 to the neutral position.
It will return to its original position as shown in the figure.

Moreover, with such a configuration, when the footboard 4 is set on the rail member 3, the connecting rod 7 that connects the rear ends 52 of the link members 5 is close to the rear end 44 of the footboard 4. I will do it. Therefore, when gripping the rear end 44 portion of the footboard 4 from the upper surface 45 side with the hand H, it becomes possible to grip the gripping portion 71 of the connecting rod 7 as well, as shown in FIG. If the footboard 4 and the connecting rod 7 are held together in this way, the link member 5 is held in the rearward rotated position, so that the rear end 52 of the link member 5 can be attached to the recessed groove 35. The work of separating the footboard from the recessed groove 35 can be performed without having to turn the hand H to the lower surface 41 side of the footboard 4.

Further, if the rear end portion 52 of the link member 5 is formed into a U-shaped flat shape and the concave groove 35 is formed into an inverted keyhole shape as described above, the rear end portion 52 of the link member 5 can be formed into the concave shape. By dropping into the bottom portion 35b of the groove 35 through the narrow entrance portion 35a, the rear end portion 52 will not come off from the recessed groove 35 when the link member 5 rotates. The solid line in FIG. 7 shows the state immediately after the rear end portion 52 of the link member 5 is dropped into the recessed groove 35, and the imaginary line in the same figure shows the state immediately after the rear end portion 52 of the link member 5 is dropped into the recessed groove 35.
shows a state in which it has rotated upward. If the footboard 4 is like this, if the footboard 4 is pressed by the chair 6 and starts the evacuation operation,
The rear end portion 53 of the link member 5 is connected to the concave groove 3.
Therefore, even if an unexpected unbalanced load is applied to the footboard 4, the footboard 4 will not come off from the rail member 3.

Incidentally, the invention as claimed in claim 2 includes a case where the connecting rod is linear, but if the gripping portion as described above is provided, the advantage is that the connecting rod can be easily gripped from the upper surface side of the footboard. occurs.

In addition, the shape of the desk body, the shape of the footboard,
Alternatively, the mounting structure of the rail member to the desk body and the structure of the link member are not limited to those of the embodiments described above, and can be modified in various ways without departing from the spirit of the present invention.

Furthermore, the rail surface of the rail member may be inclined so that the rear end side is higher than the front end side. In this way, the above-described retracting operation can be performed without the need for the rear end of the footboard to be lifted off the rail surface by a spring force.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

First, in the present invention, since the rear ends of the left and right link members are connected via the connecting rod, by placing your hand on the rear end of the footboard from the top side,
The connecting rod can also be grasped, thereby making it possible to hold the left and right link members in a constant posture. Therefore, the rear end portion of the link member can be attached to or removed from the recessed groove of the rail member without having to put one's hands around the lower surface of the footboard. Therefore, assembly and height adjustment of the footboard can be easily performed without being forced into an unreasonable posture.

By providing a U-shaped gripping portion in the middle portion of the connecting rod, it becomes possible to particularly easily grip the connecting rod.

Also, the wire rods are attached to the rear ends of the left and right link members.
The back end is made into a flat shape with a letter shape.
By engaging with the inverted keyhole-shaped concave groove, it is possible to reliably prevent the rear end from coming off the concave groove due to an unexpected unbalanced load when these link members rotate. Therefore, the retraction operation of the footboard can be performed smoothly without causing the footboard to fall off. Furthermore, by integrally constructing the left and right link members and the connecting rod using a single wire rod, it is possible to obtain the effect that these parts can be manufactured easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is an exploded perspective view showing main parts, and Fig. 3 is an exploded perspective view showing main parts.
The figure is a side sectional view of the footboard, Figure 4 is a side sectional view showing the main parts, Figure 5 is a side sectional view to explain the action, and Figures 6 and 7 are enlarged views to explain the action. It is a partial side sectional view. 1... Desk body, 2... Footboard device, 3...
...Rail member, 4...Footboard, 5...Link member, 6...Chair, 7...Connecting rod, 11,1
2...Inner wall surface, 34...Rail surface, 35...Concave groove, 35a...Inlet part, 35b...Bottom part, 51...
...front end, 52...rear end, 71...grip.

Claims (1)

[Scope of Claims] 1. A pair of rail members attached to opposing inner wall surfaces of the desk main body, and a foot board constructed between the two inner wall surfaces with both ends of the lower surface supported on the rail surfaces of both rail members. and a pair of left and right link members, the front end of which is pivotally connected to an intermediate position on the lower surface side of the footboard, and the rear end of which is pivotally supported in a recessed groove provided at the rear end of the rail member, A footboard device in which the rear ends of both link members are connected to each other via a connecting rod, wherein the connecting rod has a U-shaped gripping part in an intermediate portion thereof that can be approached to the rear end of the footboard. A desk footboard device characterized by: 2. A pair of rail members attached to opposing inner wall surfaces of the desk body, a footboard installed between the two inner wall surfaces with both ends of the lower surface supported on the rail surfaces of these rail members, and a front end of the foot board. a pair of left and right link members pivotally mounted at an intermediate position on the lower side of the footboard and having their rear ends pivotally supported in recessed grooves provided at the rear end of the rail member; In a footboard device whose ends are connected to each other via a connecting rod, the left and right link members and the connecting rod are integrally formed by a single wire rod, and the wire rod forms a U-shape at the rear end of each link member. The rear end is connected to an inverted keyhole-shaped concave groove that is provided continuously to the rear end of the rail surface and allows rotation of the rear end only at the bottom. A desk footboard device characterized by: