JP5676296B2 - Folding table device - Google Patents

Description

  The present invention is mounted on the back of a backrest of a chair installed in a lecture hall of a school, a public facility, a theater, or the like, or on a wall surface in front of a front row chair, etc. The present invention relates to a folding table device that is supported so as to be movable between a use state and a substantially horizontal use state.

  After lifting the table in the table device mounted on the back of the chair back to the upper limit position from the non-use state facing up and down, the rear seat down to the horizontal use state where the seated person in the back seat can perform writing work etc. What is supported so that it can be rotated is described in, for example, Patent Documents 1 to 3, and is well known.

Japanese Patent No. 3459219 JP 2006-181093 A JP 2009-112461 A (FIG. 16)

  In any of the above-described Patent Documents 1 and 2, a table storage box for storing the table in an unused state or a box-shaped table frame is attached to the back of the backrest. As a result, the back of the backrest protrudes greatly rearward, and the space in front of the lower limbs of the seated occupant in the rear seat may become narrow, or may obstruct the passage between the front and rear chairs. In order to prevent this, it is only necessary to install the front and rear chairs with a wider interval. However, in this case, there is a problem that the number of chairs to be installed is reduced.

In the thing of patent document 3, there is no table storage box etc., and a pair of table support parts attached to the back of the backrest can slide both sides of the table up and down and turn back and forth. Since it supports, there is little possibility that the above problems will occur.
However, the left and right table support parts are fitted to a support base having a stopper pin that regulates the rotation range of the table, and to the guide bases on both sides of the table. A pivot case having a pair of upper and lower guide pins, and a pair of spacers housed between the support base and the pivot case and restricting the pivot range of the stopper pins. The number of parts is large, resulting in high costs and a large number of assembly steps for the table device.
In addition, since both sides of the table are supported by guide pins of a rotating case that is rotatable with respect to the support base, the table cannot be lifted stably, and the table swings back and forth while being pulled up. Or turn backwards.

  The present invention has been made in view of the above problems, and supports a table so that it can be moved up and down stably by a pair of left and right table support members having a small number of parts and a simple structure. It is an object of the present invention to provide an inexpensive folding table device that can be kept in a used state by turning the table rearward and downward at an upper limit position.

According to the present invention, the above-mentioned problems are solved as follows.
(1) By using a pair of left and right table support members attached to the back of the chair back or the front wall of the chair, the both sides of the table are lifted up from the unused state and the unused state. In the folding table device that is supported so that it can move to a substantially horizontal use state by rotating rearward and downward at the upper limit pulling position, the folding table device is provided so as to protrude from the opposing surfaces of the left and right table support members. A table directed up and down is raised and lowered between the rear inward projecting wall and the rear inward projecting wall in front and above and below the rear inward projecting wall on the opposing surface of the table support member. And a pair of upper and lower front inward projecting walls projecting at an interval as far as possible, and in a rotating space surrounded by the rear inward projecting wall and the upper and lower front inward projecting walls Ma When the lower end of the raised table is rotated forward and upward, the upper surface of the front end of the table is on the lower surface of the upper inward protruding wall, and the lower surface of the table is also rearwardly protruded from the front end. By making contact with the upper surface of the wall, the table can be kept in a substantially horizontal state of use.

With this configuration, the table does not swing in the front-rear direction between the rear inward projecting wall projecting on the opposing surfaces of the pair of left and right table support members and the upper and lower front inward projecting walls. It is possible to move up and down stably between the unused state and the upper limit pulling position.
Further, when the table pulled up to the pulling position is rotated rearward and downward, the lower end of the table is rotated forward and upward in the rotation space, and the upper surface and the lower surface of the front side of the table are respectively moved to the upper front. The table can be held in a substantially horizontal use state by contacting the lower surface of the inner inward protruding wall and the upper surface of the rear inward protruding wall.
Therefore, the structure of the table support member is simplified, and the number of parts and the number of assembling steps can be reduced, so that a small and inexpensive folding table device can be provided.
Moreover, the front and rear inward protruding walls can be easily integrally formed when the table support member is formed of synthetic resin or the like, so that the number of parts is greatly reduced.

(2) In the above item (1), inward support protrusions are provided on the opposing surfaces of the left and right table support members between the front and rear inward protrusion walls, and both support protrusions are provided on both side surfaces of the table. The provided guide groove facing the longitudinal direction is slidably fitted up and down, and the table is substantially horizontally centered on the support protrusion at the pulling position where the support protrusion contacts the lower end of the guide groove. It can be rotated to the use state.

  With such a configuration, the table can be stably lifted by preventing the table from wobbling in the front-rear direction, and the left and right support protrusions are provided with guide means for lifting the table, and the table at the upper pulling position. Since it has the two functions of a support shaft that rotates rearward and downward, the number of parts can be reduced.

(3) In the above item (1) or (2), a rearward guide projection is provided on the rear surface of the upper and lower front inward projection walls, and the upper and lower guide projections are arranged on both sides of the table when not in use. The table is fitted in a guide groove provided on the front surface of the end portion and directed in the vertical direction so that the table is slidable in the vertical direction.

  With such a configuration, the table can be prevented from wobbling in the left-right direction, so that the table can be raised and lowered more stably.

(4) In any one of the above items (1) to (3), guide ridges are provided on the front and upper surfaces of the left and right rear inward protruding walls, and the guide ridges are arranged on both sides of the table in the unused state. It is slidably fitted in a guide groove that is provided on the rear surface and faces in the vertical direction.

With this configuration, when the table is oriented vertically, the guide grooves provided on both sides of the table are fitted to the front guide ridges to prevent the table from wobbling in the left-right direction. And can be raised and lowered stably.
In addition, when the table is rotated to the use state, the guide groove located on the lower surface of the table is fitted to the guide protrusion on the upper surface, thereby preventing the table from wobbling in the left-right direction in the use state. The

(5) In any one of the above items (1) to (4), when the table pulled up to the upper limit position is rotated between the upper and lower front inward protruding walls to the use state, the lower end of the table is touched. A rotation resistance applying means for applying a resistance force to the rearward downward rotation of the table by contacting and elastically deforming forward is provided.

With such a configuration, a resistance force is applied to the rotation of the table, and the table can be rotated rearward and downward at a slow speed. Therefore, the table is positioned on the upper surface of the rear inward protruding wall or the upper front inward protruding wall. The impact at the time of abutting against the lower surface of the surface is alleviated and no loud abutment sound is generated.
Further, since the rotational resistance applying means is provided between the upper and lower front inward projecting walls, it is not necessary to make the table support member in a special shape or increase in size.

  According to the present invention, the structure of the table support member is simplified, and the number of parts and the number of assembling steps can be reduced. Therefore, a small and inexpensive folding table device can be provided.

It is the perspective view which looked at the connection chair provided with one Embodiment of the folding table apparatus of this invention from back. Similarly, it is a top view of a folding table device when the table is put into use. Similarly, it is a front view. Similarly, it is a side view. Similarly, it is a perspective view. Similarly, it is an enlarged perspective view of the state which removed the table and the cover. Similarly, it is a top view of a folding table device when the table is not used. Similarly, it is a front view. Similarly, it is a side view. Similarly, it is a perspective view. It is the XI-XI line enlarged longitudinal cross-sectional view of FIG. Similarly, it is an XII-XII line enlarged vertical sectional view. Similarly, it is an XIII-XIII enlarged vertical side view. Similarly, it is an enlarged vertical side view of the same portion as FIG. 13 when the table is not used. FIG. 5 is an enlarged vertical sectional view taken along line XV-XV in FIG. 2. FIG. 14 is an enlarged cross-sectional plan view taken along line XVI-XVI in FIG. 13. FIG. 15 is an enlarged cross-sectional plan view taken along line XVII-XVII in FIG. 14.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a connecting chair installed in a school auditorium or the like, and a folding table device (hereinafter abbreviated as a table device) 3 of the present invention is attached to the back of a backrest 2 of each chair 1. ing.
2 to 5 show the table 4 described later in the table device 3 in a use state, and FIGS. 7 to 10 show the table 4 in a non-use state.

  As shown in FIGS. 2 to 5, the table device 3 includes a rectangular table 4 and a pair of table support members 5 and 5 that support both left and right side portions thereof. On both side surfaces of the table 4, guide rails 6, 6 having substantially the same length are attached by set screws 7, 7.

FIGS. 11 and 12 are enlarged vertical sectional views when the table 4 is in a use state, and the left and right guide rails 6 and 6 have an inward U that opens outward on the outer surface, the upper surface, and the lower surface, respectively. A guide groove 8 having a U-shaped cross section, a guide groove 9 having a downward arc-shaped cross section that opens upward, and a guide groove 10 having a downward U-shaped cross section that opens downward are formed in the front-rear direction. The guide grooves 8 and 10 on the outer surface and the lower surface are formed in a portion excluding the front portion and the rear portion of the guide rail 7, and the guide groove 9 on the upper surface is formed in the entire length excluding the rear portion of the guide rail 7.
Further, the depths of the guide groove 8 on the outer side surface and the guide groove 9 on the upper side are gradually made shallower toward the rear part of the guide rail 6.

  The left and right guide grooves 8 and 8 are provided on the support pins 34 provided on the left and right table support members 5 to be described later, and the left and right upper guide grooves 9 and 9 are provided on the guide pins 30 described later on the left and right lower guide grooves. 10 and 10 are respectively slidably fitted to guide ridges 15 projecting from upper portions of left and right rear inward projecting walls 12 which will be described later. These guide grooves 8, 9, and 10 may be provided directly at both end portions of the table 4 with the guide rail 7 omitted and widened accordingly.

  As shown in FIG. 13, the front end portion of the guide groove 9 on the upper surface is gradually deepened in an arc shape toward the front end. This is because the lower end of the guide groove 9 is smoothly fitted to the lower guide pin 30 described later when the table 4 is lowered to a non-use state facing the up-down direction.

  The table support members 5 and 5 are bilaterally symmetric, and as shown in FIGS. 2 to 6 (FIG. 6 is shown with the table 4 and a cover 19 to be described later removed), the side surface shape is a vertically-vertical trapezoidal shape. In addition, the thick substrate 11, the rear inward projecting wall 12 projecting from the middle portion in the vertical direction of the inner surface of the rear end portion, and the upper and lower portions of the inner surface of the front end portion of the substrate 11 face each other vertically. A pair of front inward protruding walls 13, 13 projecting in this way, and screws on the backrest 2 projecting inward so as to face each other vertically on the inner side surfaces of both front inward protruding walls 13 A pair of mounting projections 14 and 14 for stopping are provided, and the entire table support member 5 is integrally formed of synthetic resin.

  The inward projecting dimensions of the rear inward projecting wall 12 and the upper and lower front inward projecting walls 13 are substantially equal, and between the upper surface of the rear inward projecting wall 12 and the lower surface of the upper front inward projecting wall 13. A space substantially equal to the thickness of the table 4 is formed (see FIG. 13).

  Further, a space equivalent to the thickness of the table 4 is formed between the rear inward projecting wall 12, the upper and lower front inward projecting walls 13 and the upper and lower mounting projecting portions 14, and the space therebetween is directed in the vertical direction. The table 4 can be moved up and down (see FIG. 14).

  Furthermore, when the table 4 which has lifted the space surrounded by the rear inward projecting wall 12, the upper and lower front inward projecting walls 13 and the upper and lower mounting projecting portions 14 to the upper limit lifting position is rotated rearward and downward to the use state. Further, a rotation space S that allows the lower end portion (front end portion) to rotate upward and forward is provided (see FIGS. 13 to 15).

  At the front upper part of the left and right rear inward projecting walls 12, a guide ridge 15 projecting forward and upward and having a front corner portion having an arcuate curved surface is projected. Guide grooves 10 on the back surfaces of the left and right guide rails 7 are slidably fitted (see FIG. 13).

  As shown in FIGS. 6 and 15, the left and right table support members 5 and 5 are connected to each other by a left and right connecting plate 16 screwed to the front surface thereof, and are positioned in the left and right directions so that the backrest 2 is positioned. It can be attached to the back.

As shown in FIGS. 6 and 15, bolt insertion holes 17, 17 facing the front-rear direction provided on the upper piece 14 a erected from the upper surface of the front end portion of the upper mounting projection 14 and the lower mounting projection 14. The left and right table support members 5 are fixed to the back surface of the backrest 2 by inserting the inserted bolts 18 and 18 through the connecting plate 16 and screwing them into the back surface of the backrest 2.
After the table support member 5 is mounted, a cover 19 is detachably mounted between the left and right upper mounting projections 14, and the upper and rear surfaces of the left and right mounting projections 14 and the left and right front inward projections. The space between the walls 13 and 13 is nicely covered.

As shown in FIGS. 6 and 15, the left and right lower mounting protrusions 14 are attached with rotation resistance applying means 20 for applying a resistance force to the rotation of the table 4 when the table 4 is in use. ing.
The rotation resistance applying means 20 includes a base portion 21 having an inverted L-shaped cross section that is rearward in a side view, and an elastic bending piece 22 that rises obliquely forward and upward from a rear end portion of the rear piece 21a of the base portion 21. The downwardly facing piece 21b of the base 21 is fitted in a vertical groove 23 opened forward and upward provided on the front surface of the mounting projection 14, and a bolt 18 for fixing the lower mounting projection 14 is provided. Is fixed to the lower front inward projecting wall 13 by being inserted into a through hole 24 formed in the downward piece 21b and fastened together.

In the rotation space S, the elastic bending piece 22 is positioned at the middle portion in the front-rear direction between the upper and lower front inward projecting walls 13 and 13.
The rear surface of the elastic bending piece 22 forms a concave curved surface that gently curves toward the front upper side, and the thickness is gradually reduced toward the upper end, so that the upper portion is easily bent forward. Further, by providing a concave portion 25 having a circular cross-section that opens frontward and upward at the corner where the rearward piece 20 a and the elastic bending piece 22 are connected, the entire elastic bending piece 22 is moved forward with the concave portion 25 as the center. It can be elastically deformed.

  As shown in FIG. 15, the lower end of the female screw hole 26 formed in the upper mounting projection 14 facing in the vertical direction comes into contact with the upper surface of the front end portion of the table 4 in the use state, thereby An adjusting bolt 27 for adjusting the angle is screwed. A lock nut 28 for preventing loosening is screwed to the downward projecting end portion of the adjustment bolt 27.

  As shown in FIG. 13, the upper and lower front inward projecting walls 13 and 13 of the left and right table support members 5 have stepped holes 29 and 29 having openings in both the front and rear directions and a small diameter hole 29a at the rear end. The bottomed cylindrical plunger 31 that is formed in the stepped hole 29 and that is shorter than that and has a rearward-facing guide pin 30 integrally connected to the rear end surface thereof and that opens to the front, The guide pin 30 protrudes rearward from the small diameter hole 29a and is fitted so as to be slidable in the front-rear direction. The tip of the guide pin 30 is slidably fitted in a guide groove 9 provided on the upper surface of the table 4 when the table 4 is not in use.

A compression coil spring 32 is accommodated in the plunger 31, and the front end of the compression coil spring 32 is brought into contact with the rear surfaces of the connecting plates 16 fixed to the rear surfaces of the left and right table support members 5. The retaining hole 29 and the plunger 31 are prevented from being removed.
Further, when the connecting plate 16 is attached, the compression coil spring 32 is slightly compressed, so that the guide pin 30 and the plunger 31 are always urged backward, and the tip of the guide pin 30 is provided on the upper surface of the guide rail 6. The inner surface of the groove 9 is pressed.

  As shown in FIG. 16, the thick portion 11a formed slightly closer to the rear of the substrate 11 of the left and right table support members 5 has a stepped hole that opens in both the left and right directions and has a small diameter hole 33a at the inner end. 33 is formed, and the stepped hole 33 has a bottomed cylindrical shape that is shorter than the stepped hole 33 and that is integrally provided with a support pin 34 that is directed inward toward the inner end face. The plunger 35 is slidably fitted in the left-right direction.

The support pin 34 protrudes inward from the small-diameter hole 33a at an obliquely front upper side of the rear inward projecting wall 12, that is, at a central portion between opposed surfaces of the rear inward projecting wall 12 and the upper front inward projecting wall 13. It is like that. The distal end portions of the left and right support pins 34 are slidably fitted into the guide grooves 8 on the side surfaces of the left and right guide rails 6 so as to support both side surfaces of the table 4 (see FIG. 11).
Further, when the table 4 is directed in the vertical direction, the support pins 34 come into contact with the upper and lower ends of the guide groove 8 so that the table 4 stops at the lower limit position and the upper limit position. The means for stopping the table 4 at the lower limit position and the upper limit position may be, for example, a stopper or the like protruding from at least one of the left and right table support members 5 and the upper and lower ends of the table 4. .

A compression coil spring 36 is accommodated in the plunger 35, and the compression coil spring 36 has a female screw 37 formed on the inner peripheral surface of the side end portion of the stepped hole 33 and a male screw 39 on the outer peripheral surface of the presser plate 38. By screwing, the stepped hole 33 and the plunger 35 are prevented from being pulled out. At this time, the compression coil spring 36 is compressed by the pressing plate 38 so that the support pin 34 and the plunger 35 are always urged inward, and the tip of the support pin 34 is provided in the guide groove 8 provided on the side surface of the guide rail 6. It is designed to be in pressure contact with the back of the.
A hexagonal hole 40 is provided on the outer surface of the pressing plate 38 so that it can be attached and detached with a tool.

  In the table device 3 of the above embodiment, in order to change the table 4 from a non-use state facing up and down to a substantially horizontal use state, a concave hand-holding portion 41 provided at the center of the upper rear surface of the table 4 is provided. The left and right table support members that are slidably fitted to the lower ends of the guide grooves 8 and 8 provided to the upper limit pulling position, that is, on the outer surfaces of the left and right guide rails 6 and 6, 5 is pulled up until it comes into contact with the support pins 34 and 34 and stops. At this time, as shown in FIG. 7, the guide grooves 8, 9, and 10 provided in the left and right guide rails 6 have a pair of left and right support pins 34 provided in the left and right table support members 5, respectively. Since the pair of guide pins 30 and the pair of left and right guide protrusions 15 are slidably fitted, the table 4 can be stably lifted by preventing wobbling in the front-rear and left-right directions.

Next, as shown in FIGS. 13 and 15, when the table 4 pulled up to the upper limit position is rotated rearward and downward about the left and right support pins 34, the lower end portion (front end portion) of the table 4 is rotated. By rotating forward in the space S, the lower surface of the front end portion behind the support pin 34 in the table 4 is adjusted to the upper surface of the rear inward protruding wall 12, and the upper surface of the front end portion in front of the support pin 34 is also adjusted bolts. The table 4 comes into contact with the lower end of each 27 and is in a substantially horizontal use state. At this time, the guide groove 10 on the lower surface of the guide rail 6 is fitted to the upper portion of the guide protrusion 15, so that it is prevented from wobbling in the left-right direction when the table 4 is in use. Further, as shown in FIG. 16, the head of the front set screw 7 for attaching the guide rail 6 abuts or approaches the front surface of the thick portion 11 a of the substrate 11 in the table support member 5. It is reliably prevented that 4 is pulled out rearward.
When the adjustment bolt 27 does not need to protrude downward, the upper surface of the front end portion of the table 4 abuts the lower surface of the upper front inward protruding wall 13.

When the table 4 is rotated downward, its lower end (front end) abuts against the rear surface of the elastic bending piece 22 in the rotation resistance applying means 20 and elastically deforms it forward, thereby resisting the rotation of the table 4. A force is applied, and the table 4 can be rotated downward at a slow speed. Therefore, since the impact when the table 4 abuts against the rear inward projecting wall 12 and the adjusting bolt 27 is reduced, no loud abutment sound is generated.
The angle of the table 4 can be adjusted by rotating the adjustment bolt 27.

  In order to make the table 4 in a use state not to be used in the up-down direction, first, as shown in FIG. The rear surface of the upper front inward projecting wall 13 is raised up and forward until the rear surface contacts the front surface of the rear inward projecting wall 12. Then, the guide grooves 9 on the upper surfaces of both guide rails 6 are fitted into the guide pins 30 of the upper rear inward projection 13.

  When the table 4 is lowered in this state, the guide groove 9 is also fitted to the guide pins 30 of the lower rear inward projecting wall 13, and the table 4 is guided by the left and right upper and lower guide pins 30. Thus, the space between the rear inward projecting wall 12 and the upper and lower front inward projecting walls 13 is smoothly lowered. At this time, as described above, the front end portion (lower end portion when not in use) of the guide groove 9 is gradually deepened in a circular arc shape toward the front end (lower end), and is indicated by a two-dot chain line in FIG. Thus, the lower guide pin 30 fits smoothly into the guide groove 9.

  Since guide ribs 15 provided on the left and right rear inward protruding walls 12 are slidably fitted in the guide grooves 10 provided on the lower surfaces of the left and right guide rails 6, the table 4 can be moved in the left-right direction. The wobble is prevented and the descent is more stable.

  When the table 4 is lowered by its own weight to the lower limit position, that is, the position where the upper ends of the left and right guide grooves 8 come into contact with the left and right support pins 34, the table 4 is not used. In this state, the table 4 is held by the rear inward projecting wall 12 and the upper and lower front inward projecting walls 13, so there is no fear of swinging in the forward and backward directions.

  When the table 4 is lowered to the unused state, as described above, the depths of the guide groove 8 and the guide groove 9 are gradually made shallower toward the rear end (the upper end when not in use). Therefore, as shown in FIGS. 16 and 17, as the table 4 is lowered to the lower limit position, the guide pin 30 is moved forward and the support pin 34 is moved outward by compressing the compression coil springs 32 and 36, respectively. Be made.

As a result, due to the elastic repulsive force of the compression coil springs 32, 36, the tips of the guide pins 30 and the support pins 34 gradually press strongly against the back surfaces of the guide grooves 8, 9 as they go upward. The lowering speed of the table 4 can be gradually reduced by the sliding frictional resistance.
As a result, it is possible to reduce the collision sound when the table 4 stops at the lower limit position, and to prevent the lower end of the table 4 from strikingly hitting the seated person's knee in the rear seat.

  As described above, in the table device 3 of the above embodiment, the table 4 includes the rear inward projecting wall 12 projecting from the opposing surfaces of the pair of left and right table support members 5 and the upper and lower front inward projecting walls 13. , 13 can be moved up and down stably from the unused state to the upper limit position without swinging back and forth.

  In addition, when the table 4 is rotated rearward and downward at the upper limit position, the lower end portion (front end portion) of the table 4 is rotated forward and upward in the rotation space S of the opposing surface of the table support member 5. The upper and lower surfaces of the front end portion of the front end 4 abut on the lower end of the adjustment bolt 27 or the lower surface of the front inward protruding wall 13 and the upper surface of the rear inward protruding wall 12, respectively. Can be kept in a state.

  In this way, the table 4 can be raised and lowered stably only by projecting the rear inward projecting wall 12 and the upper and lower front inward projecting walls 13 and 13 on the opposing surfaces of the pair of left and right table support members 5. At the same time, the table support member 5 can be turned to a substantially horizontal state by being rotated rearward and downward, so that the structure of the table support member 5 is simplified, and the number of parts and the number of assembling steps can be reduced, thereby providing a small and inexpensive table device 3. can do.

Further, the upper and lower guide pins 30 and 30 provided on the left and right table support members 5 and the support pins 34 are provided on the upper and outer surfaces of the guide rails 6 and 6 on both side surfaces of the table 4, respectively. Are fitted into guide grooves 8 and 9 that gradually become shallower as they go upward, and are pressed against their inner surfaces, and both guide pins 30 and 34 are constantly urged by compression coil springs 32 and 36, By increasing the sliding frictional resistance when the table 4 is lowered to the non-use state facing the up and down direction, the descending speed can be reduced, so that the structure is complicated and an expensive oil damper is attached. There is no need to use a deceleration means such as a balance spring or a rotary damper.
Therefore, there is no problem such as an increase in the size of the support of the table 4 and the rotation mechanism, and the table device 3 can be reduced in size and weight, and the cost can be reduced.

  In the above-described embodiment, the table device 3 is described as being attached to the back surface of the backrest 2 of the chair 1. However, the front row of chairs can be used by the occupants of the front row of chairs. A table device 3 similar to the above can be attached to the wall surface in front of the chair.

DESCRIPTION OF SYMBOLS 1 Chair 2 Backrest 3 Table apparatus 4 Table 5 Table support member 6 Guide rail 7 Set screw 8 Guide groove 9 Guide groove 10 Guide groove 11 Board | substrate 11a thick wall part 12 Inward protruding wall 13 Front inward protruding wall 14 Mounting protrusion 14a upward piece 15 guide protrusion 16 connecting plate 17 bolt insertion hole 18 bolt 19 cover 20 rotation resistance applying means 21 base 21a backward piece 21b downward piece 22 elastic bending piece 23 concave groove 24 through hole 25 concave part 26 Screw hole 27 Adjustment bolt 28 Lock nut 29 Stepped hole 29a Small diameter hole 30 Guide pin (guide protrusion)
31 Plunger 32 Compression coil spring 33 Stepped hole 33a Small diameter hole 34 Support pin (support protrusion)
35 Plunger 36 Compression coil spring 37 Female screw 38 Presser plate 39 Male screw 40 Hexagonal hole 41 Handle portion S Rotating space

Claims (5)

With a pair of left and right table support members attached to the back of the chair back or the wall in front of the chair, the both sides of the table are lifted up from the unused state facing up and down, and the upper limit In the folding table device that is supported so that it can move to a substantially horizontal use state by rotating rearward and downward in the pulling position,
Rear inward projecting walls projecting from the opposing surfaces of the left and right table support members;
The front surface of the opposing surface of the table support member is positioned forward and above and below the rear inward projecting wall so that the table can be moved up and down between the rear inward projecting wall and the rear inward projecting wall. A pair of upper and lower front inward projecting walls projecting from each other, and in a rotating space surrounded by the rear inward projecting wall and the upper and lower front inward projecting walls, By rotating the lower end forward and upward, the upper surface of the front end of the table is on the lower surface of the upper front inward protruding wall, and the lower surface behind the front end is also on the upper surface of the rear inward protruding wall, respectively. A folding table device characterized in that the table can be held in a substantially horizontal use state by contact.   Between the front and rear inward projecting walls, on the opposite surfaces of the left and right table support members, inward support projections are provided, and on both support projections, guide grooves facing the longitudinal direction provided on both side surfaces of the table, The table is slidably fitted up and down so that the table can be rotated to a substantially horizontal use state with the support protrusion as a center at the pull-up position where the support protrusion contacts the lower end of the guide groove. The folding table device according to claim 1.   A rearward guide projection is provided on the rear surface of the upper and lower front inward projection walls, and the upper and lower guide projections are provided in the guide grooves facing the vertical direction provided on the front surfaces of both side end portions of the table when not in use. The folding table device according to claim 1 or 2, wherein the table is slidably fitted up and down in a state in which the table is oriented in the up and down direction.   Guide ridges are provided on the front and top surfaces of the left and right rear inward projection walls, and these guide ridges are slidably fitted into the guide grooves facing the vertical direction provided on the rear surfaces of both sides of the table when not in use. The folding table device according to any one of claims 1 to 3, wherein the folding table device is combined.   When the table pulled up to the pulling position is rotated between the upper and lower front inward projecting walls until it is in use, the lower end of the table abuts and elastically deforms forward, thereby moving the table downward and downward. The folding table device according to any one of claims 1 to 4, further comprising a rotation resistance applying means for applying a resistance force to the rotation.

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