JPH0739706Y2 - Bending support mechanism of folding table - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bending support mechanism for a folding table.

2. Description of the Related Art At present, for example, in passenger railroad cars and large-sized sightseeing cars, underneath the window frame on the side wall of the vehicle body, between the seats adjacent to the front and rear, the side wall of the vehicle body, or the back of the front seat, etc. In addition, the folding table is placed so that it can be bent at its upper end or lower end so that it is always perpendicular to the side wall of the vehicle body, the back of the seat, or the like, or flush with the back of the seat. The table is kept in the stored state, but if necessary, the passenger can unfold the table horizontally, place various items on the table, and again, when unnecessary, place the table vertically or in a seat. Bending it in the same state as the back side to allow passengers to have a large free space in front of themselves,
It is widely practiced.

For this reason, a support mechanism for holding such a folding table in a stored state such as vertical and, if necessary, surely holding it in a horizontal use state is required. Of course.

It is well known that various types of support mechanisms for this purpose have already been developed and put into practical use.

Now, an example of such a folding table, for a passenger railcar, is shown in schematic form,
As shown in Figure 12. That is, FIG. 3A shows the case where the table T is attached to the side wall W of the vehicle body, but the table T has a drawback that it is small.
Further, in the case of FIG. 2B, since the table T is attached to the back of the seat S, the table T can be used when the front and rear seats are faced to each other. There is the inconvenience of not having it.

Further, in particular, as shown in FIG. 12 (A), an example of a supporting mechanism for removably mounting a folding table T on a side wall W of a vehicle body is shown in schematic form in FIG. 12 (C). As indicated by the number C. Although a detailed description of the structure is omitted, the mechanism C causes a large impact when the table T in a horizontal use state is bent into a vertically stored state, but the impact is buffered. Since the supporting mechanism C has no effect, and the supporting mechanism C has a complicated structure and a relatively large weight, there is a problem that a back seat is required at a mounting portion on the side wall of the vehicle body and the price also rises. .

SUMMARY OF THE INVENTION Therefore, the present invention solves various problems in a conventionally known one as a supporting mechanism for a folding table installed on, for example, a side wall of a passenger railway vehicle. It is an object of the present invention to obtain an improved folding table supporting mechanism which has a simple structure, is lightweight, and can support a large weight.

Means for Solving the Problems In order to solve this problem, the bending support mechanism of the folding table according to the present invention has one edge fixed as shown in FIG. The table (T) is attached to the portion (W) via the hinge (H) so as to be bendable, and is arranged on the back surface of the table (T). A bending support mechanism for a folding table, comprising a first connecting member (11) and a second connecting member (21) pivotally connected to the table (T) and a fixed portion (W) at the other end, First and second tubular members (11,
21) are provided inside the bar member (15, 25) movably in the longitudinal direction under the action of elastic force, and on one end side adjacent to the first tubular member (11). And a large diameter inner hole (19) having a large inner diameter and a large diameter portion (19) provided in the rod member (25) inside the second tubular member (21) and capable of being housed in the large diameter inner hole (19) ( 25 ₀₎ and a, when the table (T) is in the horizontal support state, the second tubular member (21) inside the bar large-diameter portion of the member (25) (25 ₀₎ of said first tubular member (11 2) is housed in the large-diameter inner hole (19) and the end of the rod member (15) projects from the other end of the first tubular member (11).

Embodiments of the present invention will now be described with reference to the accompanying drawings showing the first embodiment thereof.
A detailed description will be given based on FIG.

First, FIG. 1 shows a support mechanism 50 according to the present invention, in the lower part of the window frame, between the seats S facing front and back.
1 is a schematic view showing a folding table T which is foldably supported on a side wall of a vehicle body. As can be easily understood from this figure, the support mechanism 50 according to the present invention foldably supports a relatively long table T which can be used together by, for example, four passengers. Moreover, when the table T is used horizontally, consideration is given so that a relatively large weight can be safely supported on the table T.

FIG. 2 is a perspective view showing the support mechanism 50 of FIG. 1 taken out together with the table T and enlarged.

Further, FIG. 3 is a perspective view of the support mechanism 50 and the table T shown in FIG.

As can be seen from these drawings, the table T is attached to the fixed portion, that is, the side wall W of the vehicle body via a hinge H at one edge in the longitudinal direction thereof, and the hinge H allows the table T to be stored vertically. It is designed to be freely bendable between the
50 is the lower surface of the table T, the longitudinal center line A-
A central line A- is formed between the substantially central portion of A and the side wall W of the vehicle body.
The folding link 10 comprises a folding link 10 arranged in a vertical plane containing A, the folding link 10 having two tubular members having substantially the same outer shape and length, that is, the first tubular portion on the side of the table T. It comprises a member 11 and a second tubular member 21 on the side wall W of the vehicle body. Then, the second tubular member 11 is rotatably attached to the substantially central portion 0 of the back surface of the table T by an appropriate means at the other end, and the second tubular member 21 is attached to the other end at the other end.
The first tubular member 11 and the second tubular member 21 are attached to the side wall W of the vehicle body by a suitable means so that the first tubular member 11 and the second tubular member 21 are adjacent to each other by a hinge 40.
They are connected to each other so that they can rotate freely. In this case, the lengths of the first tubular member 11 and the second tubular member 21 are the center of the longitudinal direction of the table T when the table T is installed horizontally as shown in FIGS. 2 and 3. In the vertical plane including the line A-A, a slightly inclined "He" is formed with respect to a straight line L-L that connects the swingable mounting points on the respective table T side and the swingable mounting points on the side wall W side of the vehicle body. It is assumed that the shape and size are selected so as to take the shape of the character "" (see FIG. 4).

Next, FIG. 4 is an enlarged front view of a supporting mechanism 50 according to the present invention. As shown in FIG. As described above, it is composed of the first tubular member 11 and the second tubular member 21 that are freely connected, but in addition, as described above, the respective center lines X-X and Y-Y are formed.
Is intersected at an obtuse angle θ smaller than 180 ° at about the hinge 40, and is almost “heavy” with respect to the straight line L-L connecting the centers of the hinges formed at the other ends. It is also clear that they are designed to form letters.

Therefore, the details of the first tubular member 11 and the second tubular member 21 will be described below.

First, as shown in FIG. 4, the first tubular member 11 is composed of a tubular main body 12 and a rod member 15 slidably inserted therein. That is, in particular, as shown in FIG. 5, the body 12 is has a hollow bore 12 ₀ inside diameter d, the inside of the hollow bore 12 _0, approximately in the middle of the longitudinal direction in part, and the small through section 12 ₁ of a certain length is formed,
Further, rod member 15, as shown in FIG. 6, has an outer diameter corresponding to the inner diameter d of the hollow bore 12 ₀ of the main body 12, a large diameter portion 15 ₀ of a certain length, the small diameter portion of the main body 12 It consists of a small diameter part 15 ₁ having an outer diameter corresponding to the inner diameter of 12 ₁ , and this small diameter part 1
After 5 ₁ is slidably inserted into the small-diameter portion 12 ₁ of the main body 12 from the side of the pivotable connecting end of the main body 12 to the table T, the small-diameter member 15 _{1 has} an end portion shown in FIG. First, as shown in
Cylindrical having an outer diameter corresponding to the inner diameter d of the hollow bore 12 ₀ of the body 12 of the tubular member 11 to secure the stop member 16 having a length. Incidentally, in this case, the hollow bore 12 ₀ of the body 12,
A coil spring 30 is interposed in the annular space formed between the large diameter portion 15 ₀ of the rod member 15 and the small diameter portion 15 ₁ adjacent to it (see FIG. 4). the large diameter portion 15 ₀ of the rod member 15, from the other end side of the table T of the body 12 of the first tubular member 11, at all times, Yes so as to protrude (see FIG. 4), also, the state In the above, it is assumed that the stopper member 16 is retracted inside the main body 12. In addition, at the other end of the main body 12 of the first tubular member 11, that is, at the end on the table T side, the table T of the main body 12 is provided.
A hinge part 17 for pivotable attachment to the second tubular member 21 is formed at one end, and a hinge part 18 for pivotable connection with the second tubular member 21 is formed. the end large diameter end portion having a center line X-X in the hollow bore 12 ₀ of the body 12 of the first tubular member 11, the center line Y-Y which intersects than 180 ° at small obtuse θ The inner hole 19 is formed only for a short length, and the end face 12 ₂ on this side of the main body 12 is
Are cut substantially at right angles to the center line Y-Y. The end portions and the stop member 16 of the large-diameter portion 15 ₀ of the rod member 15
Hemispherical portions 15 ₂ and 16 ₁ are formed at the end portions of each.

Next, the structure of the second tubular member 21 will be described. This has a structure similar to that of the first tubular member 11 just described, and the second tubular member 21 also It comprises a tubular main body 22 as shown in FIG. 8 and a rod member 25 as shown in FIG. 9 slidably inserted therein. That is, in detail, as shown in FIG.
Has a hollow inner hole 22 ₀ with an inner diameter d. Inside this hollow inner hole 22 ₀ , a small diameter portion 22 ₁ of a certain length is formed in the substantially central portion in the longitudinal direction. Cage and bar member 25
As shown in FIG. 9, a large-diameter portion 25 ₀ having a certain length and an outer diameter corresponding to the inner diameter d of the hollow inner hole 22 ₀ of the main body 22,
It is composed of a small diameter portion 25 ₁ having an outer diameter corresponding to the inner diameter of the small diameter portion 22 ₁ of the main body 22, and this small diameter portion 25 ₁ is
After being slidably inserted into the small-diameter portion 22 ₁ of the first tubular member 11 from the side of the pivotable connecting end to the body 12, the end of the small-diameter portion 25 ₁ is shown in FIG. Such a second tubular member 2
Cylindrical having an outer diameter corresponding to the hollow bore 22 ₀ of the inner diameter d of the first body 22 to secure the stop member 26 having a length.
In this case, in the annular space formed between the hollow inner hole 22 ₀ of the main body 22 and the small diameter portion 25 ₁ adjacent to the large diameter portion 25 ₀ of the rod member 25, the coil spring 31 is interposed. However, due to the tension of this coil spring 31, the large diameter portion 25 of the rod member 25
_0, from one end side of the first tubular member 11 of the body 22 of the second tubular member 21, toward the end face 12 ₂ of the side of the first tubular member 11, at all times, Yes so as to project, also In this state, the stopper member 26 is deeply retracted inside the main body 22 at the other end of the main body 22 on the vehicle body side.

A hinge member as shown in FIG. 11 is attached to the other end portion of the main body 22 of the second tubular member 21 on the side wall W side of the vehicle body so that the main body 22 can be pivotally attached to the side wall W of the vehicle body. 27 is attached by fixing its cylindrical base portion 27 ₀ to the hollow inner hole 22 ₀ of the main body 22, and at one end, the first
Outside the hinge portion 28 for the pivotable connection between the main body 12 of the tubular member 11 is formed, the end portion has a center line into the hollow bore 22 ₀ of the body 22 of the second tubular member 21 Y-Y It is cut at right angles to the end face 22 ₂ is formed.

First tubular members each having the above structure
The bodies 12 and 22 of the 11 and second tubular member 21 are hinged portions 18 and 28 formed adjacent the respective end faces 12 ₂ and 22 _2.
Are rotatably connected to each other via a hinge 40, and the body of the first tubular member 11 is assembled.
12 and the body 22 of the second tubular member 21, as shown in FIG. 4, is pivoted about the hinge 40 connecting them pivotally, the end faces 12 ₂ and 22 ₂ for their opposing, mutually contacting the case is in a state such that, as shown in Figure 4, from the end face 22 ₂ of the main body 22 of the second tubular member 21, the end portion of the large diameter portion 25 ₀ of the rod member 25, the first tubular member 11 It is in a state protruding to the large diameter inner hole portion 19 formed by connecting the end face 12 ₂ of the main body 12. Therefore, the body of the first tubular member 11 and the second tubular member 21.
12 and 22 are received from the body 22 of the second tubular member 21 into the large diameter bore 19 of the body 12 of the first tubular member 11;
Large diameter portion 25 of rod member 25 protruding from main body 22 of tubular member 21
_{By 0,} it will be firmly held together.

In this way, the first tubular member 11 and the second tubular member 11 shown in FIG.
The tubular member 21 is in a state of supporting the table T in a horizontal state (see FIGS. 1 and 2). Further, in this state, the main bodies 12 and 22 of the first tubular member 11 and the second tubular member 21 are
The end face 12 ₂ and 22 ₂ facing is because the state of being in contact with each other, the horizontal holding table T, the second tubular member 21
Of the large diameter portion 25 ₀ of the rod member 25, coupled with the protruding into the large-diameter inner hole portion 19 of the body 12 of the first tubular member 11, it is possible to further strengthen.

On the contrary, in order to bring the table T in this state into the vertically stored state, as shown in FIG. 4, the rod member 15 of the rod member 15 protruding from the other end portion of the first tubular member 11 on the table T side. the semi-spherical portion 15 ₂ of the large-diameter portion 15 _0, the direction of the arrow P, is pressed against the force of the coil spring 30, stop member 16 secured to the other end of the rod member 15, this A hemispherical portion 16 ₁ formed along the free end of the rod member 15 moving in the direction of arrow P and moving in that direction is placed in the body 22 of the second tubular member 21. the large diameter portion 15 ₀ of 25, via its free end 25 _2, against the force of the coil spring 31, is pressed in the direction of the center line Y-Y of the main body 22. In this way, the rod member 25, which is placed inside the body 22 of the second tubular member 21, moves toward the other end along its center line Y-Y while its large diameter portion 25 _0. the free end 25 _2, when the substantially passes through the contact portion of the end face 12 ₂ and 22 ₂ facing the body 12 and 22 of the first tubular member 11 and the second tubular member 21, a first tubular member 11, the 2 tubular members
Between the 21 and the large diameter inner hole portion 19 of the former, since connection by engagement between the large diameter portion 25 ₀ of the latter rod member 25 is released, the first tubular member 11 and the second tubular member 21 A free swivel motion between the and becomes possible. Therefore, due to the weight of the table T applied to the hinge portion 17 at the pivotable connection point of the first tubular member 11 on the table T side, the main body of the first tubular member 11 is
From the hinge portion 18 at one end of 12 through the hinge 40 to the second
A rotational moment is applied to the hinge portion 28 at one end of the main body 22 of the tubular member 21, and as a result, the second tubular member 21 moves around the hinge member 27, which is a pivotable connection point on the side wall W side of the vehicle. The first tubular member 11 and the second tubular member 21 are turned,
The table T is rotated around the hinge 40 and vertically overlaps with each other, so that the table T comes to have a vertically stored state.

Further, conversely, in order to install the table T from the vertically stored state to the horizontally used state, the table T is placed around the hinge H at a pivotable connection point to the side wall W of the vehicle. When you turn until it becomes horizontal, along with this,
The first tubular member 11 and the second tubular member 21 also pivot about a hinge 40 that pivotally connects them to each other and try to assume a substantially linear state, but immediately before that, the second tubular member 11
The free end portion of the large diameter portion 25 ₀ of 21 bar members 25 25 _2, a coil spring
Due to the tension of 31, the large-diameter inner hole portion of the main body 12 of the first tubular member 11
Both first tubular members 11 as they are forcedly inserted into 19
And the second tubular member 21 is again firmly and integrally connected,
In this state, the table T will be held securely.

Further, when the bending mechanism according to the present invention is attached to the bending table T, in order to perform the bending operation, as shown in FIG. 3, the back surface of the table T is attached to the side wall W of the vehicle. Hinge H at a pivotable connection point
On the free side wall of the table T on the opposite side of the table T, a metal rod or a tubular push rod 45 extending along the center line AA in the longitudinal direction of the table T to approximately the center thereof is moved by an appropriate means. freely disposed, the ends of the central portion of the table T is, the other end portion as well as into contact with the semi-spherical portion 15 ₂ of the large diameter portion 15 ₀ of the rod member 15 of the first tubular member 11 , The inner end of a push button 46, which is installed on the side wall of the table T so as to be freely pressed along the longitudinal center line AA, is brought into contact with the side wall.

In this way, the bending operation of the table, push bar 45 by pressing the push button 46 presses the semi-spherical portion 15 ₂ of the large diameter portion 15 ₀ of the rod member 15 of the first tubular member 11 This can be done by doing so.

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned configuration and operation, its structure is relatively simple and light in weight and bears a large load as compared with the conventionally known ones. In addition, even if the table is comparatively long, it can be safely and reliably held in the used state, and many excellent effects are exhibited.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a table held horizontally in a passenger railway vehicle by a mechanism according to the present invention, and FIG. 2 is an enlarged perspective view showing the table and an indicating mechanism. 3 is a perspective view showing the back surface of the table together with its indicating mechanism, FIG. 4 is an assembled front view showing one embodiment of the mechanism according to the present invention in a horizontal state of the table, and FIG. A longitudinal sectional front view showing a main body which is one member constituting the first tubular member which is one constituent member, FIG. 6 is a front view showing a rod-shaped member which is another member, and FIG. FIG. 8 is a front view showing the stopper member, and FIG. 8 is a second structural member of the mechanism according to the present invention.
FIG. 9 is a front view showing a main body which is one member constituting the tubular member, FIG. 9 is a front view showing a rod-shaped member which is another member, and FIG. 10 is a front view showing the stopper member. 11 is a front view showing a hinge member, and FIGS. 12A, 12B and 12C are schematic views showing a folding table and an indicating mechanism thereof in a conventional passenger rail vehicle. 10 …… Bending link, 11 …… First tubular member, 12,22…
… Main body, 12 ₀ , 22 ₀ …… Hollow inner hole, 12 ₁ , 15 ₁ , 22 ₁ , 25 ₁ …
… Small diameter part, 12 ₂ , 22 ₂ …… End face, 15,25 …… Bar member, 15 ₀ ,
25 ₀ …… Large-diameter part, 16,26 …… Stopping member, 15 ₂ , 16 ₁ …… Semi-spherical part, 17,18,28 …… Hinge part, 19 …… Large-diameter inner hole part, 21
...... Second tubular member, 27 ...... Hinge member, 30,31 ...... Coil spring, 40 ...... Hinge, 50 ...... Support mechanism, H ...... Hinge, T ...... Table, W ...... Fixed part (side wall) .

Claims (2)

[Scope of utility model registration request] 1. One edge is fixed to a fixed part (W) by a hinge (H).
The hinge (40) is arranged on the back surface of the table (T) that is freely bendable via
A first connecting member (11) and a second connecting member (21) which are rotatably connected to each other via a table and are rotatably connected to the table (T) and the fixed portion (W) at each end. A bending support mechanism for a folding table, which comprises: inside the first and second tubular members (11, 21),
A bar member (15, 25) housed movably in the longitudinal direction under the action of elastic force, and a large diameter with a large inner diameter provided on one end side adjacent to the first tubular member (11). lumen (19) and, provided on the second tubular member (21) inside the rod member (25), said can accommodate large diameter portion to the large diameter inner hole portion (19) (25 ₀₎
With bets, large tables when (T) is in the horizontal support state, the second tubular member (21) inside the bar large-diameter portion of the member (25) (25 ₀₎ of said first tubular member (11) A bending support mechanism for a folding table, which is housed in a radially inner hole (19) and has an end of a rod member (15) protruding from the other end of the first tubular member (11). 2. A center line (XX) of the first tubular member (11) and a second line when the table (T) is in a horizontally supported state.
The bending support mechanism for a folding table according to claim 1, wherein the center line (Y-Y) of the tubular member (21) intersects at an obtuse angle (θ) smaller than 180 °.