JPS6225152Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a folding table with an improved structure of the connecting part between the top support frame and the pillars.

Generally, in the case of this type of table, a pedestal is mounted on the back side of a top plate 1 as shown in FIG. 4A and 4B are connected so that they can be folded and unfolded.

However, conventionally, the top plate support frames 2A, 2B
A bracket bearing 3 is fixed to the bracket bearing 3 by means such as welding, and the upper ends of the pillars 4A and 4B are rotatably supported by pins P on the hanging end side thereof.

In order to smoothly execute the rotation, the pillar 4A,
At the unfolded position of 4B, a clearance 1 is created between the upper end of the pillar and the top support frames 2A, 2B.

As a result, when the table is used, the top plate support frames 2A, 2B are held only by the pivot pins P of the pedestals 4A, 4B, which causes play in the pedestals 4A, 4B.

The backlash places a severe load on the stay 5 for holding the pillars 4A, 4B in the normal upright position, resulting in problems in terms of the strength of the stay.

Therefore, in order to effectively eliminate the backlash, the pillar 4
A reinforcing crosspiece 6 is installed between A and 4B at a lower position far away from the upper end pivot pin P thereof.

In this case, although the above-mentioned looseness can be reliably eliminated, there is a problem in using the table that the cross-pole 6 gets in the way when the table is seated on the side where the cross-pole is installed.

The present applicant has already discovered that in the folding structure of the supporting legs of a desk in Utility Model Application No. 50-85403, the folding fittings serving as the bracket bearings have a groove-like structure in which a pair of side pieces that sandwich a horizontal mounting member are connected by end pieces. A configuration has been disclosed in which a support leg attachment piece is horizontally suspended between the lower ends of the both side pieces at the tip of the main piece, and the support leg is fixed to the support leg attachment piece.

According to the above configuration, the support leg mounting piece consists of a bottom plate that covers the lower part of both sides from the middle part to the rear, the inner surface of which abuts the horizontal mounting member when the support leg is extended, and the back surface The supporting legs are fixed by welding, etc.

Therefore, with the above configuration, in order for the support leg mounting piece to always collide with the horizontal mounting member (top support frame) when unfolded, the position of the support leg mounting piece must be at a position where it collides with the horizontal mounting member without any gaps. needs to be set accurately, and if a molding error or the like occurs in each member, it is impossible to adjust the position of the support leg mounting piece that becomes the abutting surface.

Furthermore, the supporting leg is merely welded to the back surface of the supporting leg mounting piece, which has the drawback that positioning is time-consuming and the strength of the fixed portion is weak.

This invention was made in view of the above circumstances, and its main objective was to form abutting surfaces that support the top plate support frame of the bracket bearing with a simple structure, to make the position of the abutting surfaces adjustable, and to make it possible to adjust the position of the abutting surfaces. To provide a folding table that facilitates the fixing of fixed pillars and increases the fixing force.

Another object of this invention is to provide a folding table in which reinforcing crossbars installed between the pillars do not interfere with seating.

In order to solve the above-mentioned problems, this invention is designed to sandwich and pivot both longitudinal ends of the top plate support frame that supports the top plate between a pair of bracket pieces extending outward from a bracket bearing each having a channel-shaped cross section. At the same time, the pedestal is connected in a direction perpendicular to the bracket piece, and the pedestal is connected to the top support frame so that it can be folded or expanded, and when the pedestal is expanded, it collides with the lower surface of the top support frame. In a folding table in which the bracket bearing is provided with an abutting surface that straddles a bendable stay between the top support frame and the pillar, the bracket bearing is (a) orthogonal to the bracket piece; (b) Above the socket part, the both side walls of the bracket bearing are partially cut in the middle of the bracket bearing. A technical measure has been taken in which a folding claw piece is provided at the top end of the pillar.

As a result, the folding claw pieces can be adjusted and moved in the vertical direction, so the misalignment between the top plate support frame and the abutment surface that is the inner surface of the folding claw pieces due to molding errors can be adjusted, and the top plate support frame can be folded in without any gaps. It can be brought into contact with the claw piece.

Further, simply by fitting the pedestal into the socket portion of the bracket bearing, the pedestal is positioned and fixed in a state surrounded by the back surface of the folding pawl piece and the inner circumferential surface of the socket portion.

Hereinafter, a preferred embodiment of this invention will be described based on the drawings from FIG. 3 onwards. However, the same parts as those of the conventional example shown in FIGS. 1 and 2 are given the same reference numerals, and the explanation of the structure of these parts will be omitted.

The bracket bearing 3 is fitted into the upper ends of the pillars 4A and 4B and is integrally fixed by means such as welding.

Such a bracket bearing 3 is shown in FIGS. 4 and 5.
As shown in more detail in the figure, it is comprised of a substantially horizontally L-shaped channel member having a socket portion 3C into which a pillar 4A or 4B is fitted and secured at a position orthogonal to the bracket piece portion 3B. That is, the bracket piece 3B consists of a pair of left and right protruding pieces that extend in the direction toward the center of the top support frames 2A, 2B when the pillars 4A, 4B are in the expanded and upright position. Then, make a substantially U-shaped notch in both side walls at a position corresponding to the thickness of the top plate support frames 2A, 2B at the part that intersects with the upper part of the socket part 3C, and fold the notched wall part inward to form the folding claw piece 3A. is formed.

This folding claw piece 3A can change the abutting position with the top plate support frames 2A, 2B depending on its bending angle, so each support frame 2A, 2
It is possible to finely adjust the abutting position according to B.

In addition, the socket part 3C is made up of left and right sides and a back surface, and a folding claw piece 3A is protruded from the upper part, so that positioning for fixing can be performed simply by fitting the pedestal 4A or 4B. The pedestal 4A or 4B can be fixed to the bracket bearing 3 by welding or the like.

The front end side of the bracket piece 3B is rotatably connected to the top plate support frames 2A, 2B by a pin P.

Thereby, each leg 4A, 4B can be freely folded into a position along the top support frames 2A, 2B, and unfolded into an upright position perpendicular to these frames.

Top plate support frames 2A, 2B and pillars 4A,
4B, side legs 6A and 6B are installed near the bracket bearing 3.

A diagonal stay 5 is installed between these horizontal legs 6A and 6B.
is straddled.

The stay 5 is an upper stay member 5 whose sloping upper end side is pivoted to the side beam 6A on the top plate support arm side with a pin P1.
A, and a lower stay member 5B which is bendably connected to the vicinity of this inclined lower end side by a pin P2, and whose inclined lower end side is pivotally supported to the pedestal side crosspiece 6B by a pin P3.
It is made up of.

Both of these stay members 5A, 5B are each integrally formed with a rectangular groove cross-sectional shape from a steel plate, and when they are formed, the groove width of one of the stay members, that is, the lower stay member 5B in the case of the illustrated example, is the same as that of the upper stay member 5A. The groove width is set narrow. And both stay members 5
The mutually connected end sides of A and 5B are fitted in an overlapping state by an appropriate length, and in this fitted state, both side walls of the tip end of the lower stay member 5B are bent on both side walls of the upper stay member 5A with pins P2 such as rivets. They are freely connected.

Therefore, the stay 5 configured as described above can be freely extended to a straight state and bent in two directions using the connecting pin P2 between both stay members as a bending joint point.

Therefore, when the stay 5 is deployed, the stay 5 is diagonally extended, and the inner surface of the upper wall of the upper stay member 5A and the outer surface of the upper wall of the lower stay member 5B abut each other at their overlapped portions. By exhibiting the stopper function in the above-mentioned extended state, the pillar 4A,
Hold 4B in the upright and deployed position.

This stay 5 includes both stay members 5A and 5B.
A coil-shaped toggle spring 7 is stretched across the mutual grooves and extends in the longitudinal direction of the stay.

This toggle spring 7 has both stay members 5A and 5B.
For the locking pieces 7A, 7B cut and raised toward the respective grooves, the pillars 4A, 4B and the top plate support frames 2A, 2B are connected to the pillars 4A, 4B and the top plate support frames 2A, 2B from the pin connection part P2 in the stay 5 when deployed. The frame is stretched so that the maximum tension is reached at a position that is biased towards the corner formed by the frame.

Therefore, the toggle spring 7 biases the stay 5 in the elongated and deployed direction when its spring axis passes over the pin connecting portion P2 toward the corner portion, and the toggle spring 7 biases the stay 5 in the expansion and deployment direction.
2 in the opposite direction to the corner side, the stay 5 is urged in the folding direction.

Next, the folding operation of the above embodiment will be explained. When the folded pillars 4A and 4B are unfolded as shown in FIG. 7, the bracket bearing 3 rotates clockwise around the pivot pin P in the figure.

By this rotation, the bracket bearing 3 is fitted into the top plate support frames 2A, 2B, and finally the folding claw piece 3A of the bracket bearing 3 abuts against the lower edge of the frame.

The abutting position becomes the raised and deployed position of the pillars 4A, 4B.

In this state, the stay 5 is extended and is biased in that direction by the toggle spring 7.
The pillars 4A, 4B are reliably held in the upright and deployed position.

Eventually, the table will be used, but when the stay 5 is bent when the table is not in use, the toggle spring 7 acts in the direction of the bend, causing the pillars 4A, 4B to be attached to the top support frames 2A, 2B. It can be folded along the line with a light operation force.

As described above, according to the configuration of this invention, the bracket piece of the bracket bearing fixed to the upper end of the pedestal and extending laterally is pivotally supported by the top plate support frame, and the bracket part is attached to the top plate support frame when the pedestal is deployed. Since fold-in claw pieces are provided that abut against the top plate support frame, the fold-in claw pieces can hold the top plate support frame in surface contact when the top plate is used with the pedestal expanded. can.

For this reason, there is no possibility that the pedestals will wobble when the top plate is used, and the table can always be used with good stability.

In addition, as mentioned above, the rattling of the pillars can be eliminated by the pivot position of the pillars relative to the top plate support frame and the folding claw pieces, so the reinforcing crossbars between the pillars can be placed in an upper position close to the bracket bearings. It can be erected.

For this reason, when the user is seated on the side where the cross-branch is installed, the cross-branch does not get in the way.

In particular, in this invention, since a folding claw piece is used on the abutting surface with the top plate support frame, when a gap occurs between the top plate support frame and the abutting surface, the folding claw piece Adjust by changing the
The folding claw piece can be supported in close contact with the top support frame.

Furthermore, the back surface of this folding pawl piece, together with the inner circumferential surface of the socket part, can regulate the upper and lateral (three sides) of the pedestal, and the positioning for fixing the pedestal to the bracket bearing. The present invention provides a highly reliable folding table that not only facilitates the fixation but also increases the fixation strength by surrounding the fixation part.

[Brief explanation of drawings]

FIG. 1 is a partial front view of a table according to a conventional example, FIG. 2 is a partial perspective view of the table frame, FIG. 3 is a front view of a table according to a preferred embodiment of this invention, and FIG. Fig. 5 is an enlarged front view of a part of the connecting part between the top support frame and the pedestal in the table; Fig. 5 is an enlarged front view of the bracket bearing mounting part; Fig. 6 is a cross section taken along the - line in Fig. 5. FIG. 7 is an explanatory view of the operation of the pillar in the folded state. 1 is the top plate, 2A and 2B are the top plate support frames, 3
is a bracket bearing, 3A is a folding claw piece, 3B is a bracket piece, 4A and 4B are pillars, 5 is a stay, 6
B is Yokodan.

Claims (1)

[Claims for Utility Model Registration] Both ends in the longitudinal direction of a top plate support frame that supports a top plate are held and pivoted between a pair of bracket pieces extending outwardly of a bracket bearing each having a channel-shaped cross section. The pedestal is connected in a direction perpendicular to the bracket piece, and the pedestal is connected to the top support frame so that it can be folded or expanded, and when the pedestal is expanded, it collides with the lower surface of the top support frame. In a folding table in which the surface is provided on a bracket bearing, and a bendable stay is straddled between the top support frame and the pedestal, the pedestal is fitted in a position where the bracket bearing is perpendicular to the bracket piece. It has a generally horizontal L-shape with a socket part that is firmly fixed.Above the socket part, in the middle of the bracket bearing, both side walls of the bracket bearing are partially cut and bent inward, and attached to the top end of the pedestal. A folding table characterized by being provided with a folding claw piece that is folded back.