JPS6232441Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device that foldably connects the top plate of a foldable table such as a table tennis table, a conference table, or a dining table with a simple structure.

In general, the connecting devices for this type of folding table are often complex combinations of multiple link means, making the opening and closing operations heavy and forceful, resulting in unbalanced left and right movement, and when folding, the left and right top plates interfere with each other. They may rub against each other or collide with each other, damaging the board surface.

This idea was devised to solve the above-mentioned problems.It is strongly connected with a small number of parts, and can be opened and closed easily, does not damage the top plate when folded, has a simple structure, and is easy to operate. A connecting device is provided in which a right-facing triangular connecting plate and a left-facing triangular connecting plate are arranged to intersect with each other, and a protruding piece that approaches each other is provided at the top of each connecting plate on the crossing side, and a connecting plate that approaches the intersection at the bottom of each connecting plate is provided. A through hole is bored in the side end, and above the hole, the center is the center of the through hole, and in the case of a right-facing connecting plate, the left end semicircular part is on the vertical center line of the through hole, and the required distance is made to the right from there. On the other hand, in the left-facing connecting plate, arcuate long holes are provided whose right end semicircular part is on the vertical center line of the through hole and extend to the left by the same angle, and these arcuate long holes The upper screw rod is inserted into the through hole, and the lower screw rod is inserted into the through hole to rotatably connect the two connecting plates, and the left and right links are rotatably attached to the bottom outer ends of both connecting plates. Installation: The top protruding piece of each of the connecting plates is pivotally connected to the left or right frame crosspiece, the upper end of the link is pivotally connected to the inner end of the right or left side frame crosspiece, and the lower end of the link is pivotally connected to the right or left side frame crosspiece. It is characterized by being rotatably connected to the inner ends of the horizontal support rods connected to the support legs.

Examples thereof will be described below with reference to the drawings.

Fig. 1 shows an exploded view of the connecting member of this invention. Reference numerals 1 and 1' denote a pair of left and right connecting plates that are approximately triangular in shape, the upper oblique sides of which are inclined in opposite directions, and the bottom sides of which are inclined in opposite directions. are arranged so as to intersect so that they are almost horizontal, and protruding pieces 1a and 1a' are provided at the top of the intersecting side to extend diagonally upward so as to approach each other, and at the intersecting end of the bottom side, a pivot Through holes 2, 2' are drilled to serve as fulcrums, and these through holes 2, 2'
Above the through holes 2', arcuate elongated holes 3, 3' having a required angle range centered on the center of the through holes 2, 2' are bored in the following manner.

That is, in one (rightward facing) connecting plate 1, the center of the left end semicircular part of the elongated hole 3 is on the vertical center line of the through hole 2, and from there the elongated hole 3 is oriented rightward within the required angular range (described later). In addition, in the other (left facing) connecting plate 1', the center of the right end semicircular part of the long hole 3' is aligned with the through hole 2'. It lies on the vertical center line, from which the elongated hole 3' extends symmetrically to the left over the same angular range as the other elongated holes 3.

Each connecting plate 1, 1' is cross-polymerized with the through holes 2, 2' aligned and interposed by a washer 7, and the through holes 2, 2' and arcuate long holes 3, 3' are made of metal or synthetic resin The sleeve 6 is inserted as shown in FIG. The washer 7 and spring ring 8 are fitted,
By screwing together the nut 9, both connecting plates 1, 1'
are rotatably connected, and left and right links 4 or 4' are attached to the bottom outer ends 1b, 1b' of both connecting plates 1, 1' in a slightly lower position as shown in Fig. 3 (b). It is rotatably attached by a pin 10 with a washer 7 interposed therebetween, and assembled as one connecting member as shown in FIG.

Figure 4 shows the left and right top plates 1 connected by the above connecting members.
1 and 11' are connected to form a table tennis table, and the top protruding piece 1a of the right-facing connecting plate 1 is located at the butting inner end of the frame crosspiece 12' provided on the lower surface of the left top plate 11'. This connecting plate 1 is rotatably supported on the
The upper end of the link 4 attached to the top plate 11 is rotatably supported at the inner end of the frame crosspiece 12 provided on the lower surface of the right top plate 11, and the top protruding piece 1a' of the left-facing connecting plate 1' is The upper end of the link 4', which is rotatably supported on the abutting inner end of the frame crosspiece 12 on the lower surface of the right side top plate 11 and connected to this connecting plate 1', is connected to the upper end of the frame crosspiece 12' on the lower surface of the left side top plate 11'. It is rotatably supported at the inner end.

On the other hand, the lower ends of the left and right links 4, 4' are rotatably connected to the inner ends of horizontal support rods 13, 13', respectively, and the outer ends of each horizontal support rod 13, 13' are connected to the left and right frame bars 12, The upper end is rotatably attached to the center of the frame 12', and the lower end is rotatably connected to the upper parts of the left and right support legs 14, 14', which have casters 14a, 14a', and are links to the frame crosspieces 12, 12'. 4,
4', and the lines connecting the pivot points of the support legs 14, 14' and the pivot points at both ends of the horizontal support rods 13, 13' each form a parallelogram.

Further, the abutting ends on the rear side of the left and right top plates 11, 11' are also connected in the same manner by the above-mentioned connecting member.

When the top plates 11, 11' are unfolded as shown in FIG.
The left end semicircular part of the left end is engaged with the upper threaded rod 5a of the stopper member 5 via the sleeve 6, and the right end semicircular part of the arcuate long hole 3 of the left-facing connecting plate 1' is similarly engaged with the left and right top threads. The horizontal state of the plates 11, 11' is maintained; in other words, the upper threaded rod 5a is held by the semicircular portion at the left or right end of the arcuate long holes 3, 3' of the left and right connecting plates 1, 1'. , the vertical piece of the U-shaped stopper member 5 is held in a vertical position.

In this unfolded state, the top plates 11,1
When the outer ends of the connecting plates 1' are lifted, the top plates 11 and 11' rotate upward about the pivot points of the top protruding pieces 1a and 1a' of the connecting plates 1 and 1', respectively, and at the same time both connecting plates 1 , 1' is the lower threaded rod 5b of the stopper member 5.
The right-facing connecting plate 1 rotates counterclockwise, and the left-facing connecting plate 1' rotates clockwise about the axis.
a' rotates away from each other, and the top plates 11 and 1
1′, and lower the bottom outer end 1b, 1
The links 4, 4' connected to b' are the top plates 11, 1
1' is pushed up, the top plates 11 and 11' rotate smoothly as shown in Figure 5 without their butt ends interfering with each other, and are erected and folded as shown in Figure 6. .

At this time, the right end semicircular part of the arcuate long hole 3 of the right-facing connecting plate 1 is engaged with the upper screw rod 5a of the stopper member 5, and the left end semicircular part of the arcuate long hole 3' of the left-facing connecting plate 1' The top plates 11, 11' are held in an upright state so that they do not fall inward. Also in this case, the upper screw rod 5a is the lower screw rod 5.
b, that is, located on the vertical center line of the through holes 2, 2', and the vertical piece of the stopper member 5 is held in a vertical state.

Therefore, if the vertical piece of the stopper member 5 is bent and stretched as shown in FIG. 7A to form a net pole for latching the end of the net, the top plates 11 and 11' can be fixed as shown in FIG. 8A. When unfolded, the upper screw rod 5a is inserted into the arcuate elongated hole 3 of the right-facing connecting plate 1 as described above.
The pole (stopping member 5) is held by the left end semicircular part of the left end semicircular part and the right end semicircular part of the arcuate long hole 3' of the left-facing connecting plate 1'.
maintains the vertical position, and as shown in Figure B, the top plate 11,
11', the upper screw rod 5a is no longer held by the arcuate long holes 3, 3', so the pole tilts as shown by the dotted line, but the top plate 1
1 and 11' are erected, the upper screw rod 5a is now held by the right-end semicircular part of the arcuate long hole 3 of the right-facing connecting plate 1 and the left-end semicircular part of the arcuate long hole 3' of the left-facing connecting plate 1'. The pole is held vertically.

By configuring the stopper member 5 as a net pole in this manner, it is possible to save the trouble of tensioning the net each time using a separate clamping member during use, and to eliminate problems with the tensioning state.

Note that the stopper member 5 does not necessarily have to be U-shaped, and the upper threaded rod 5a serves as a stopper.
There is no problem even if the lower screw rod 5b, which plays the role of a pivot, is separated. Similarly, the stop member 5
Even when using a net pole, the upper screw rod 5a and the lower screw rod 5b may be separated as shown in FIG. 7B.

As described above, this invention consists of a pair of right-facing and left-facing connecting plates that are rotatably connected by a lower screw rod, and left and right links that are rotatably attached to the bottom outer ends of each connecting plate. Therefore, the number of parts is small and the configuration is extremely simple, and when the top plate is raised, the inwardly diagonal protruding pieces provided on each connecting plate pull down to separate the butting inner ends of the top plate, and the links push up. As a result, the inner edges of the top plate can be rotated smoothly from side to side without colliding with each other, and when the top plate is unfolded or stood up, the right or left end of the arcuate slots provided symmetrically on each connecting plate can be rotated smoothly. Since the semicircular portion of the top plate is engaged with the upper screw rod, the horizontal state and folded state of the top plate can be reliably maintained without requiring any special fixing means.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a connecting member according to this invention. FIG. 2 is a front view of the assembled state. FIG. 3A is a sectional view taken along the line XX in FIG. 2. Figure B is a side view of Figure 2. Figure 4 is a front view of the table tennis table with its top plate connected. Figure 5 is a front view of the top plate in the middle of rotation. FIG. 6 is a front view of the folded state. FIGS. 7A and 7B are perspective views when the stopper member is a net pole. FIGS. 8A, 8B, and 8C are explanatory diagrams showing the posture of the net pole when the top plate is unfolded, rotated, and stood up. In the figure, 1, 1'...Connecting plate, 1a, 1a'...Protruding piece, 1b, 1b'...Outer end, 2, 2'...Through hole, 3, 3'...Elongated arc hole, 4,4'...link,
5... Stopping member, 5a... Upper screw rod, 5b...
Lower screw rod, 6...Sleeve, 7...Washer, 9...
...nut, 11,11'...top plate, 12,12'...
...Frame beam, 13,13'...Horizontal support rod, 14,1
4'... Supporting leg.

Claims (1)

[Scope of utility model registration request] A right-facing triangular connecting plate 1 and a left-facing triangular connecting plate 1' are arranged to cross each other, and protruding pieces 1a, 1a' that approach each other are provided at the top of each connecting plate 1, 1' on the crossing side, and the bottom side There are through holes 2,
2' is bored, and above it, the left end semicircular part of the right-facing connecting plate 1 is on the vertical center line of the through hole 2, and from there to the right. An arcuate elongated hole 3 extending at a required angle is provided, and in the left-facing connecting plate 1', the right end semicircular portion is on the vertical center line of the through hole 2', and an arcuate elongated hole 3' extends to the left by the same angle from there. are provided, and the upper screw rod 5a is inserted into these arcuate long holes 3, 3', and the lower screw rod 5b is inserted into the through holes 2, 2', so that both the connecting plates 1, 1' can be rotated. The left and right links 4, 4' are rotatably attached to the bottom outer ends 1b, 1b' of both connecting plates 1, 1', respectively, and the top protruding pieces 1a, 1a' is pivotally connected to the left or right frame crosspiece 12, 12', and the upper end of the link 4, 4' is connected to the right or left frame crosspiece 12,
The lower ends of the links 4, 4' are connected to the inner ends of the right or left support legs 14, 12', respectively.
A connecting device for a folding table, characterized in that the connecting device is rotatably connected to the inner ends of horizontal support rods 13, 13' connected to 4'.