JPH01190308A - Foot board device for desk - Google Patents

Abstract

PURPOSE:To hold right and left link members to constant posture and to easily assemble or adjust the height of a foot board without enforcing an unnatural posture by connecting the back end pats of the right and left link members through a linking rod and applying a hand from an upper surface side on the back end part of the foot board. CONSTITUTION:Under a state in which the foot board 4 is set on a rail member 3, the linking rod 7 for linking the back end parts 52 of the link member 5 is approached to the back end 44 of the foot board 4. Therefore, at the time of grasping the back end 44 part of the foot board 4 by the hand H from the upper surface 45 side, the grip part 71 of the linking rod 7 can is grasped together. In such a way, the foot board 4 and the linking rod 7 are grasped together, and then, the link member 5 is held at a backward rotating position, so that the operations for mounting the back end part 52 of the link member 5 on a recessed groove 35 or separating from the recessed groove 35 can be executed without extending an arm H on the lower face 41 side of the foot board 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a footboard device suitable for use in study desks and the like.

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

As one of these, a combination of a desk and a chair with adjustable seating height has been developed, in which a footboard is installed between the inner walls under the top plate so that the height can be adjusted. However, 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 may be adjusted as the child grows. It is designed to be adjusted accordingly. 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 you make this footboard just like a shelf, it will get in the way.
When using the chair under the desk, it becomes impossible to store the chair under the top board.

Therefore, in recent years, a pair of rail members have been attached to the opposing inner wall surfaces of the desk body so that their positions can be changed vertically, and a footboard has been suspended horizontally between the horizontal rail surfaces of both rail members. It has been proposed that the front end of the link member is pivotally mounted at an intermediate position on the lower surface of the rail, 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 this case, 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 backward against the biasing force. In the moved 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.

However, with this configuration, if a chair is inserted under the desk top when the footboard is not in use and the feet are not placed on it, the legs of the chair will push the front end of the footboard backwards. This will lead to pressure on 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 the link member. The front end side slides on the rail surface while the rear end side rises and stands upright. Therefore, the chair can be accommodated under the desk top without being obstructed by this footboard.

Furthermore, since this footboard does not slide backwards but stands up and retreats, it is also possible to use the space behind the footboard as a storage space.

[Problems to be Solved by the Invention] However, in the conventional type, 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.

(2) That is, with such a structure, it is difficult to touch the link members and the link members from the upper surface side of the footboard or to bias the link members in a desired direction.

Therefore, when attaching and detaching the rear end of each link member to the recessed groove, it is necessary to rotate and hold the link member in the required position by placing your hand around the underside of the footboard. There is a problem with being forced into an awkward position.

(2) Furthermore, the rear end of the conventional link member is simply the end 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 an unbalanced force is applied when the footboard is raised and retracted as described above, the rear end portion is likely to come off the recessed groove.

The invention described in claim 1.2 is aimed at solving the problem (2) above. Further, the invention according to claim 3 aims to solve the problem (2) in addition to the problem (2) above.

[Means for Solving the Problems] In order to achieve the above object, the present invention employs the following configuration.

That is, the desk footboard device according to the present invention includes a pair of rail members attached to opposing inner wall surfaces of the desk body;
A footboard is constructed between the two inner wall surfaces with both ends of the lower surfaces supported on the rail surfaces of both rail members, and the front end is pivoted to an intermediate position on the lower side of the footboard, and the rear end is attached to the rail. It is characterized by comprising a pair of left and right link members pivotally supported in concave grooves provided at the rear end of the member, and the rear ends of both link members are connected to each other via a connecting rod. In particular, in order to facilitate attachment and detachment of the footboard, it is desirable to provide a U-shaped grip portion in the middle portion of the connecting rod, which can be approached to the rear end of the footboard.

In addition, 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 wire rod is shaped like a U-shape at the rear end of each link member. The rear end should be made into a flat shape with a shape of
It is preferable to engage with an inverted keyhole-shaped recess that is provided continuously at the rear end of the rail surface and allows rotation of the rear end only at its bottom.

[Operation] 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. I will do it. Therefore, when gripping the rear end portion of the footboard from the top surface side, it becomes possible to grip 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 The work of separating the footboard from the footboard can be carried out 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, the connecting rod can be held even if the rear end of the footboard is casually gripped from the top side. You can hold it securely. 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 code] Hereinafter, one embodiment 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 laterally symmetrical shape, and the intermediate portion thereof is omitted in FIG. 2. 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 footboard 4 installed between these rail members 3, and a front end portion 51. The link member 5 is pivotally attached to an intermediate position on the lower surface side of the footboard 4 and has a rear end 52 pivotally supported on the rear end 3a of the rail member 3.

The desk body 1 has a top plate 15 between the upper ends of the left and right side plates 13 and 14.
The height of the top plate 15 cannot be adjusted. A space 17 formed between one inner wall surface 11 formed by the left side plate 13 and the other inner wall surface 12 formed by the sleeve 16 provided inside the right side plate 14 is provided with a space 17 for adjusting the sitting height. The seat and legs 61 of a possible chair 6 can be accommodated therein. A footboard device 2 according to the present invention is provided on the front side of the space 17, and a storage shelf 18 for placing books and the like is provided at the back.

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

The footboard 4 is rectangular and has a depth that is slightly less than half of the depth of the space 17, and its lower surface 41
Both end portions 41a of the rail are supported by both rail surfaces 34, and are constructed between the side inner wall surfaces 11 and 12.

The link member 5 is made of, for example, a metal wire, and has an inwardly bent front end 51 attached to the lower surface 4 of the footboard 4.
The rail member 3 is pivotally connected to bearings 42 attached to portions near both ends of the rail member 3, and its rear end portion 52 protruding outward is engaged with the recessed groove 35 of the rail member 3 for pivotal support. and,
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 and the bottom 35b.
The rear end portion 52 is engaged with the aforementioned inverted keyhole-shaped concave portion 35 that allows rotation of the rear end portion 52 only in this case. A gripping portion 71 is provided at the intermediate portion of the connecting rod 7. Gripping part 71
is formed by deforming a member into a U-shape, and can be approached to the rear end 44 of the footboard 4 when the footboard 4 is installed between the rail members 3. FIG. 3 shows the footboard 4 removed from the rail member 3. Therefore, the link member 5 is caused to converge to the neutral position shown by the solid line in FIG. , is elastically biased. The biasing force of the torsion coil spring 53 is such that when the footboard 4 is placed on the rail surface 34, the rear end 44 side of the footboard 4 is slightly lifted from the rail surfaces 3, 4. The value is selected as follows.

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

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 connected to the rear end 44 of the footboard 4. will be close to. Therefore, the rear end 44 portion of the footboard 4 is moved to the upper surface 45 by hand H.
When gripping from the side, the gripping portion 71 of the connecting rod 7 can also be gripped as shown in FIG. By gripping the footboard 4 and the connecting rod 7 together in this manner, the link member 5 is held in the rearwardly rotated position, so that the rear end 52 of the link member 5 is held in the recessed groove 3.
5 and removal from the recessed groove 35 can be performed without having to move the hand H to the lower surface 41 side of the footboard 4.

Furthermore, 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 a reverse eyelet shape as described above, the rear end portion 52 of the link member 5
If it is dropped into the bottom part 35b of the concave groove 35 through the narrow entrance part 35a, the rear end 52 will not come off from the concave 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 has been dropped into the recessed groove 35, and the imaginary line in the figure shows the state when the link member 5 has rotated upward. It shows the condition. With such a structure, if the footboard 4 is pressed by the chair 6 and starts the retracting operation, the rear end portion 52 of the link member 5 will not come off the recessed groove 35, so that the footboard Even if an unexpected unbalanced load acts on the board 4, the footboard 4 is
This will not cause problems such as separation from the device.

Although the present invention includes a connection rod having a linear shape, providing a gripping portion as described above has the advantage that the connection rod can be easily gripped from the upper surface side of the footboard.

Also, the shape of the desk body, the shape of the footboard, or
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 various modifications can be made 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-mentioned retracting operation can be performed without the need for the rear end side 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 a connecting rod, it is possible to grasp the connecting rod by placing a hand on the rear end of the footboard from the top side. This allows the left and right link members to be held in a constant position. Therefore, the rear end portion of the link member can be attached to or detached 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.

In addition, the rear ends of the left and right link members are made into flat U-shaped wire rods, and the rear ends are engaged with the inverted keyhole-shaped concave grooves, so that the link members can rotate. This can reliably prevent the rear end from coming off the recessed groove due to an unexpected unbalanced load.

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 easily manufacture these parts.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is an exploded perspective view showing the main parts, FIG. 3 is a side sectional view of the footboard, and FIG. 4 is a main part. FIG. 5 is a side sectional view for explaining the action, and FIGS. 6 and 7 are enlarged partial side sectional views for explaining the action. 1... Desk body 2... Footboard device 3... Rail member

Claims (1)

[Scope of Claims] 1. A pair of rail members attached to opposing inner wall surfaces of the desk body, and a structure constructed between the two inner wall surfaces with both ends of the lower surfaces of both rail members supported on the rail surfaces. The rail member includes a footboard, and a pair of left and right link members whose front end portions are pivotally connected to an intermediate position on the lower surface side of the footboard, and whose rear end portions are pivotally supported in a recessed groove provided at the rear end portion of the rail member. A footboard device for a desk, characterized in that the rear end portions of both link members are connected to each other via a connecting rod. 2. The footboard device for a desk according to claim 1, wherein the connecting rod is provided with a U-shaped grip portion in its intermediate portion that can be accessed at the rear end of the footboard. 3. The footboard device according to claim 1, wherein the left and right link members and the connecting rod are integrally formed of a single wire rod, and the rear end of each link member has a U-shaped flat shape. The rail is characterized by having its rear end engaged with an inverted keyhole-shaped concave groove that is provided continuously with the rear end of the rail surface and allows rotation of the rear end only at its bottom. desk footboard device.