JPH0729863Y2 - Support structure of table board support frame in folding long desk - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, a table board supporting frame attached to the upper end of an upright pedestal can be freely folded horizontally or vertically. The present invention relates to a support structure for a table board support frame in a folding long desk.

[Conventional technology]

Conventionally, there is a folding type long desk disclosed in, for example, Japanese Utility Model Laid-Open No. 59-41129. This foldable long desk is
A flexible connecting member is provided between the back side of the top plate and the pedestal,
It is used by pressing the connecting member from the side bent in a mountain shape with a compression spring to make the connecting member linear and always holding the pedestal upright.

[Problems to be solved by the device]

However, the long desk described in the above publication does not have a lock function, and therefore, if the connecting member is inadvertently pressed from below with a foot, it may be bent and the pedestal may fall down. For this reason, especially when used in elementary and junior high schools, accidents may occur due to the impact of unintentionally contacting children who are violently moving.
Further, since such a connecting member is manufactured by combining a cylindrical member into which a compression spring is loaded, there is a problem that the structure is complicated, the manufacturing cost is high, and moreover, it is easily broken.

Therefore, an object of the present invention is to provide a support structure for a table board support frame in a folding long desk that solves the above problems.

[Means for Solving the Problems]

To achieve such an object, the present invention attaches upright columns to the lower surfaces of the left and right side rods of a horizontal table board support frame in the shape of a rectangular frame, and makes the table board support frame parallel to the column. A structure for supporting a table board support frame in a foldable long desk that can be folded, in which horizontal ridges are provided on the same side of the left and right rods, while left and right are provided at the upper ends of the left and right pedestals. Each side rod is fitted with a pivot support metal fitting having a substantially cross-sectional shape, and one side wall of each pivot support metal fitting is provided with an engagement piece for releasably engaging with the ridge. It is pivotally supported by the support metal and is elastically urged so that the engaging piece always engages with the protrusion, and
A support frame is attached to the outer side surface of the one pivot support metal member, and an operation lever for disengaging the engagement between the both protrusions and the engagement piece is pivotally supported on the support frame and is interlocked with the operation lever. The lock member is pivotally supported, and the lock member engages with one of the side rods when the operation lever is not operated to lock the protrusion and the engaging piece, and when the operation lever is operated, one of the side rods is engaged. Is disengaged and the lock between the protrusion and the engaging piece can be released.

[Action]

When the table board support frame is in the horizontal position, the left and right side rods are elastically urged to one side wall of the pivot support metal fitting, each engaging piece engages each ridge, and the locking member is on one side. It is engaged with the rod. As a result, even if a shock against the elastic force is applied to the table plate support frame carelessly, the engagement between each protrusion and each engagement piece is locked without being disengaged, and the state is surely maintained. And prevent the table board support frame from being unnecessarily folded.

When folding the table board support frame, operate the operation lever. As a result, the engagement with the one side rod of the lock member that interlocks with the operation lever is released, and at the same time, the lock between each protrusion and each engagement piece is released. Then, each engaging piece is removed from each ridge, and the table board supporting frame can be freely folded.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 5, reference numeral 1 is a horizontally long rectangular table board support frame, which includes left and right side rods 2a, 2b and front and rear side rods 3a, 3b formed hollow by a square pipe material. Are assembled and integrally formed.

4a and 4b are a pair of left and right pedestals that are connected to the lower surface of the left and right side rods 2a and 2b near the rear side rod 3b via pivotal support fittings 5a and 5b. (Not shown)
It is attached and movable. In addition, 6 is an intermediate shelf which is mounted below the table board support frame 1, and the left and right of its inner end are pivotally supported by the pedestals 4a and 4b, and one end of the support rods 7 and 7 are respectively attached to the left and right of the front end. And the other end of each of the supporting rods 7 and 7 is pivotally supported inside the left and right side rods 2a and 2b, so that the table plate supporting frame body 1 can be attached without obstruction. .

Then, ridges 8 and 8 having a required length are horizontally provided on the inner surface of the left rod 2a and the outer surface of the right rod 2b at positions immediately above the pedestals 4a and 4b, respectively.

As shown in FIG. 2, the pivot support metal fitting 5a fixed to the upper end of the left pedestal 4a has a bottom plate 10 of its base body 9a formed wider than the width of the left rod 2a, and inner walls formed on both side edges of the bottom plate 10. 11 and an outer wall 12 are erected to have a substantially cross-sectional shape, and an engaging piece 13 that engages with the ridge 8 in a system-releasable manner is bent and formed at the upper end of the inner wall 11. Further, the inner wall 11 and the outer wall 12 are projected from one end of the bottom plate 10,
Both ends of a support shaft 14 which is horizontally penetrated by the left rod 2a are supported near the tip thereof, and a spring 15 is loaded on the support shaft 14 between the outer wall 12 and the left rod 2a to form a ridge 8. It is urged to engage the engagement piece 13.

Further, the pivot metal fitting 5b fixed to the upper end of the right pedestal 4b is the fourth
As shown in the figure, the base 9b has the same shape as that of the base 9a, but the roles of the inner wall and the outer wall are reversed, and the engaging piece 13 is engaged with the ridge 8 at the upper end of the outer wall 12 so as to be detachable. Is bent, a spring 15 is similarly loaded between the inner wall 11 and the right rod 2b, and the ridge 8 and the engaging piece 13 are urged to engage with each other. A support frame 16 having a U-shaped horizontal cross section is fixed to the outer surface of the outer wall 12 at right angles, and a support shaft 17 supports the operation lever 18 near the upper end thereof in the support frame 16. Reference numeral 19 denotes a T-shaped support member for supporting the upper end portion of the operation lever 18 in a resiliently biased state. The horizontal rod 20 is supported by a slot 21 provided in the support frame 16, and a vertical rod is provided. The outer wall 12 penetrates the outer wall 12 so that the tip end thereof is abutted against the outer surface of the right rod 2b. Further, a spring 23 having a smaller spring constant than the spring 15 is mounted between the vertical rod 22 and the outer wall 12.

Reference numeral 24 is a plate-shaped locking member disposed on the outer side surface of the support frame 16, and as shown in FIG. Spring between member 24
Intervene 25. The lock member 24 has an operating lever 18 at one end.
An engaging hole is formed by providing an engaging piece 26 to be engaged with the engaging claw piece 27 at the other end and projecting the engaging claw piece 27 on the lower surface of the right rod 2b.
28 is engaged. The lock member 24 is biased by the spring 25 so that the locking claw piece 27 engages with the engagement hole 28, and the locking claw piece 27 is engaged in association with the operation of the operation lever 18. To be solved.

In the present invention thus constructed, when the table board support frame 1 is in the horizontal position on the pedestals 4a, 4b as shown in FIG. 1, the left and right side rods 2a, 2b are pivoted by the springs 15, 15, respectively. Brackets 5a, 5b
The engaging piece 1 is elastically urged toward the inner wall 11 or the outer wall 12 side of the
3, 13 are engaged with the ridges 8, 8 projecting from the left and right side rods 2a, 2b, and this state is maintained by the springs 15, 15 repulsing.
Further, as shown in FIG. 6, a locking claw piece 27 protruding from the tip of the locking member 24 is engaged with an engaging hole 28 penetrating the lower surface of the right rod 2b. As a result, the protrusions 8 and 8 and the engagement pieces 13 and
13 and are locked.

Therefore, even if the table plate support frame 1 is inadvertently applied with an impact against the elastic force and the locking between the protrusions 8 and 8 and the engagement pieces 13 and 13 is attempted to be released, the engagement is achieved. Since the claw piece 27 and the engagement hole 28 are not disengaged from each other, the left and right side rods 2a and 2b are not displaced, and as a result, the protrusions 8 and 8 and the engagement pieces 13 and 13 are locked. Is maintained, and that state is reliably maintained. Therefore, the table board support frame 1 is not unnecessarily folded.

Next, attach the table board support frame 1 in the horizontal position in this way to the pedestal 4
To fold in parallel with a and 4b, pull the end of the operating lever 18 at the position shown in FIG. 3 with force in the direction of the arrow to pull the operating lever 18 into the support shaft 17 as shown in FIG. The lever 23 is compressed by the lever as a fulcrum to separate the right side rod 2b from the outer wall 12 of the base body 9b, and the engagement piece 13 is disengaged from the protrusion 8. At the same time, since the lock member 24 also moves in conjunction with the operation lever 18, the engagement claw piece 27 of the lock member 24 is disengaged from the engagement hole 28 provided in the lower surface of the right rod 2b, and the lock is released. As a result, the table board support frame 1 is folded in parallel with the pillars 4a and 4b as shown in FIGS.

[Effect of device]

As described above, when the table board support frame is supported in the folding long desk of the present invention, when the table board support frame is in the horizontal position, the locking claw piece of the lock member is engaged with the right rod. Since the engagement between each ridge and each engagement piece is locked, it can be safely used without being folded carelessly. Further, since it has a simple structure, there are no failures, and the manufacturing cost can be reduced, and the folding is simple. Therefore, all the conventional problems can be solved.

[Brief description of drawings]

FIG. 1 relates to an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which a table board support frame is horizontally supported, FIG. 2 is an enlarged plan view of a left frame side, and FIG. FIG. 4 is a perspective view, FIG. 4 is a plan view of the same, FIG. 5 is a perspective view of an essential part seen from below, FIG. 6 is a sectional view of the same, FIG. 7 is a sectional view showing the same action, and FIG. 8 is a folded state. FIG. 9 is an enlarged perspective view of a main part of FIG.
FIG. 10 is an enlarged perspective view of a main part of the same as above, and FIG. 11 is an enlarged perspective view of the left lever side of the same in a folded state. 1 ... Table board support frame, 2a, 2b ... Left and right side rods, 4a, 4b ...
Pillars, 5a, 5b ... Pivot metal fittings, 8,8 ... Ridges, 13,13 ... engaging pieces, 16 ... Support frame, 18 ... Operating lever, 24 ... Lock member.

Claims (1)

[Scope of utility model registration request] Claims: 1. A pedestal that stands upright is attached to the lower surfaces of the left and right side rods of a rectangular frame-shaped horizontal table board support frame, and the table board support frame can be folded so as to be parallel to the column. A support structure for a table board support frame in a folding long desk that is made possible, in which horizontal protrusions are provided on the same side of the left and right rods, while the left and right rods are respectively provided at the upper ends of the left and right pedestals. A pivotable metal fitting having a substantially cross-sectional shape that can be fitted is fixed, an engaging piece for releasably engaging with the ridge is provided on one side wall of each pivotal metal fitting, and each side rod is pivotally attached to each pivot metal fitting. It is supported and is elastically urged so that the engaging piece always engages with the projection, and a support frame is attached to the outer surface of the one pivotal support fitting, and the support frame and the both projections are attached. The operation lever for disengaging the engagement piece is pivotally supported, and the lock member that is interlocked with the operation lever is also pivotally supported. When not operating, one side rod is engaged to lock the protrusion and the engagement piece, and when the operating lever is operated, the engagement with one side rod is released and the protrusion and the engagement piece are released. A support structure for a table board support frame in a foldable long desk, characterized in that the lock can be released.