JP4451549B2 - Seating table - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a table for a seat, and more particularly to a table suitable for a case where a plurality of seats are arranged in parallel at the front and rear and an angle adjustable seat back is attached to the seat back.
[0002]
[Prior art]
In the interior design of an automobile or the like, as illustrated in FIG. 2 to which the present invention is applied, a table is attached to the seat back (back portion) of the seat so that the rear seat passenger can easily use the table. Various types of tables having additional functions such as cup holders are employed. In terms of structure, for example, the table body is attached to the seat back so as to be able to turn up and down via a hinge portion, and is turned downward by a rigid shaft supported so as to be able to turn and hold through a mounting bracket. The storage position and the use position that is rotated upward from the storage position and becomes substantially horizontal are switched and held. An example of this structure is described in Japanese Patent Application No. 2000-62768 filed earlier by the present applicant.
[0003]
[Problems to be solved by the invention]
By the way, as for the seat in a vehicle interior, a seat back is normally angle-adjusted with a reclining mechanism with respect to a seat cushion (seat part). Further, in a mode in which a plurality of seats are arranged in the front-rear direction, a rear seat occupant uses a table provided on the seat back of the front seat as shown in FIG. Therefore, in FIG. 2 (a), for example, if the occupant in the front seat does not leave the table in the use position, the seat back may greatly tilt backward. In that case, as shown in FIG. 2 (b), the table in the use position hits the seat cushion or the like in the rear seat at the same time as the seat back is tilted backward, and is damaged. This is because the conventional table main body has a structure in which only the rotation is switched between the storage position and the use position, and a configuration effective for such a situation is lacking.
[0004]
The object of the present invention is to improve reliability by reliably eliminating damage to the table body without sacrificing weight reduction or usability even if the above situation occurs, and in particular, the use position and the storage position of the table body. An object of the present invention is to realize a seating table that can simultaneously improve the rotation switching operability and the stable holding performance at each position.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, as illustrated in FIGS. 1 to 9 , the table body 1 is attached to a seat back 9 whose angle of the seat 7 is adjusted so as to be rotatable up and down via a hinge portion 6. At the same time, the storage position is rotated downward by the rigid shaft 3 supported so as to be able to be rotated and held via the mounting bracket 4, and is switched to the use position that is rotated upward from the storage position and becomes substantially horizontal. In the seat table to be held, the table main body 1 is provided on the lower surface, and receives a load to rotate further upward from the use position together with the guide groove 20 for guiding the movement of the tip of the shaft 3; has a breakage preventing means 15 to permit rotation of the upward escape from the corresponding portion of the guide groove 20 of the shaft 3 when the load exceeds the set value, the breakage preventing means 15 is the Is continuously to Ido groove 20 the tip of the shaft 3 is made of a relief portion 17 for receiving through a control projection 16 from the guide groove.
[0006]
In the above table for seating, the table body 1 is held in the use position via the shaft 3 and the bracket 4. In this use position, the table main body 1 normally holds a load of an article or the like placed thereon via the shaft 3 and the bracket 4. However, for example, as shown in FIG. There may be an upward load. In that case, when the load of the table body 1 becomes larger than the set value as shown in the ellipse of FIG. 1, the shaft 3 is released from the guide groove 20 by the breakage preventing means 15 and moved upward corresponding to the load. Therefore, it is possible to prevent the situation of table breakage as in the prior art. The set value here is, for example, larger than a normal load received when the table body 1 is rotated to the use position (the breakage prevention means 15 is not activated by the rotation operation to the normal use position), and When the table is further rotated upward from the use position, the value is smaller than the load recognized as the table breakage.
[0007]
The present invention as described above is more preferably embodied as follows.
1stly, among the above invention, the control protrusion 16 can be easily attached by the convex shape etc. which are attached to the guide groove 20, and the escape part 17 can be easily attached by the groove | channel etc. similar to the guide groove 20. FIG. For this reason, the breakage prevention means 15 is realized with a simple configuration.
Secondly, the table body 1 has a rail portion 2 that protrudes from the lower surface 12 to form the guide groove 20, and the tip 31 of the shaft 3 gets over the regulation protrusion 16 from the guide groove 20. Sometimes it is accompanied by the elastic displacement of the rail part 2. As a configuration for allowing the shaft 3 to escape to the escape portion 17 via the restriction projection 16, for example, the restriction projection 16 itself may be elastically oscillated or elastically displaced. It is easy to lose quality. This configuration is significant in that such a problem is hardly caused by elastically displacing the rail portion 2 itself.
Thirdly, the rail portion 2 is provided with a slit 21 interposed between the lower surface 12 of the table main body 1. This makes it easier to ensure the elastic displacement of the rail portion 2 due to the presence of the slit 21. Here, the slits 21 need only be substantially parallel to the guide groove 20. For example, a plurality of slits 21 may be provided at intervals in the front-rear direction, or may not be continuous as in the embodiments described later. You may make it provide only in the corresponding | compatible part.
Fourth, the guide groove 20 includes first and second elastic locking portions 26 and 27 for releasably locking the tip 31 of the shaft 3 at the use position and the storage position of the table main body 1, respectively. It is the structure which has. This is because, in the use position and the storage position, the shaft 3 is locked by the corresponding elastic locking portions 26 and 27 with respect to the guide grooves 20, so that the table body 1 is stably held at each position. It is made to be done.
Fifth, the shaft 3 is bent into a substantially U-shape, and has a shaft portion 33 that is bent outward at both ends of the U-shape, while the bracket 4 rotates the shaft 3 via the shaft portion 33. It is configured to have a pair of cam portions 45 that are assembled so as to be movable and guide the shaft 3 to a rotation restricting position while being in pressure contact with the corresponding portion of the shaft 3. For example, the shaft 3 makes it possible to use an urging force expressed by bringing the U-shaped piece portions 32 closer to each other, and to ensure an appearance of appearance. The bracket 4 can easily realize the switching and holding action of the shaft 3 by the biasing force of the shaft 3 and the pressing force of the cam portion 45 against the cam surface.
[0008]
A part of the table main body 1 is used, for example, with a cup hole, a cup receiving member together with a cup hole, and an electrical connection for a portable device such as a notebook computer according to required items. Is done. The installation part is the back of the seat back whose seat angle is adjusted, but the seat itself may be installed in a room such as an automobile, train or airplane.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing the overall operation of the table. FIG. 2 shows an example of table installation, wherein (a) is a schematic diagram using the front seat table among the front and rear seats, and (b) is when the front seat back is tilted backward. It is a schematic diagram. 3 and 4 show the table in relation to FIG. 2, FIG. 3 (a) corresponds substantially when viewed from the direction of arrow A in FIG. 2 (a), and FIG. 3 (b) shows FIG. 4A corresponds substantially when viewed from the direction of arrow B in FIG. 2A, FIG. 4A corresponds substantially when viewed from the direction of arrow C in FIG. 2A, and FIG. FIG. 4C is a schematic view of each table substantially corresponding when viewed from the direction of arrow E in FIG. 2B. 5 and 6 show the table main body, FIG. 5A is a bottom view thereof, FIG. 5B is a view showing a cross section along line FF of FIG. 5A together with a hinge member, and FIG. 5C is a view of FIG. It is a figure which shows a GG line cross section with a hinge member. 6A is a cross-sectional view taken along the line HH in FIG. 5A, FIG. 6B is a cross-sectional view taken along the line JJ in FIG. 5 and FIG. 6C is a section K in FIG. An enlarged view and FIG. 6D are enlarged views of a portion L in FIG. FIG. 7 shows a single bracket, (a) is a top view thereof, (b) is a front view thereof, (c) is a sectional view taken along line MM of (a), and (d) is (a). It is a NN sectional view taken on the line. 8A and 8B show a single cover member. FIG. 8A is a top view thereof, FIG. 8B is a front view thereof, and FIG. 8C is an enlarged cross-sectional view taken along line OO in FIG. FIG. 9 is a diagram of a single shaft.
[0010]
The seat table of the embodiment is mainly composed of a table body 1 having a rail portion 2 and a breakage prevention means 15, and includes a rigid shaft 3, a mounting bracket 4, a cover member 5, and a hinge member 6. Further, this table is designed assuming a seat back 9 of the seat 7 as illustrated in FIG. The seat back 9 can be angle-adjusted in the front-rear direction with respect to the seat cushion 8 via a reclining mechanism. A table placement portion 9a is provided on the back side, and the table main body 1 overlaps the placement portion 9a. The fixing part corresponding to the bracket 4 and the hinge member 6 is also secured. These are the same as before. Hereinafter, after describing each member feature and assembly, the main operations will be mentioned.
[0011]
(Constituent member) The table main body 1 is made of a substantially rectangular plate-shaped resin molded product, the peripheral edge portion 10 has a slightly large roundness, and the upper surface 11 is edged by the peripheral edge portion 10 that is one step higher. The lower surface 12 is lowered by one step with respect to the peripheral edge portion 10, and as shown in FIGS. 5 and 6, a rail portion 2 provided substantially at the right and left of the rear edge of the lower surface 12 and a pair of attachment portions 13 into which the hinge member 6 is incorporated. It is integrally formed.
[0012]
Of these, the attachment portions 13 are provided in pairs apart from each other as shown in FIG. 5, and each of the attachment portions 13 includes two ribs 14 on which the hinge member 6 can be disposed. Each rib 14 is provided with a shaft hole 14a facing each other. The hinge member 6 is a member for attaching the table main body 1 to the arrangement portion 9a, and can be arbitrarily changed according to the configuration on the arrangement portion 9a side. In this form, the shaft portion 62 is provided on both sides of the base portion 61, and each shaft portion 62 is fitted into the corresponding shaft hole 14a, so that they are assembled between the ribs 14 so as to be relatively rotatable. The hinge member 6 has a pin 63 and an attachment hole 64, is positioned and arranged with respect to the arrangement portion 9a via the pin 63, and is fixed by a fixing member 65 such as a screw inserted through the attachment hole 64.
[0013]
As shown in FIG. 6, the rail portion 2 protrudes from the lower surface 12 through a slit 21, extends from a little before the front edge of the lower surface 12 to a substantially middle position in the front-rear direction, and has breakage prevention means 15 together with the guide groove 20. The breakage prevention means 15 includes a restriction projection 16 and a relief portion 17. That is, the rail portion 2 is connected and supported to the lower surface 12 by standing walls 22 and 23 provided before and after the slit 21, and forms a guide groove 20 and a relief portion 17 along the longitudinal direction of the rail thickness. ing. For this reason, the outline of the rail part 2 is divided by the upper piece part 24 located on the slit 21 side, the lower piece part 25 located on the outside, and the front and rear standing walls 22 and 23. The height of the slit 21 is designed to be smaller than the guide groove 20.
[0014]
The guide groove 20 is fitted with the tip 31 of the shaft 3 and has a length capable of guiding the movement of the tip 31 when the table body 1 is rotated between the storage position and the use position. In this groove | channel, it has the 1st elastic locking part 26 which locks the table main body 1 in a use position, and the 2nd elastic locking part 27 locked in a storage position. Both elastic locking portions 26 and 27 lock the tip 31 of the shaft 3 so as to be freely disengaged to prevent inadvertent rattling and inadvertent movement of the shaft 3. In this embodiment, the first elastic locking portion 26 is formed of a protrusion that is provided in front of the restricting protrusion 16 and protrudes from the inner surface of the upper piece 24 as shown in FIG. The tip 31 gets over the protrusion and is restrained and locked with the restricting protrusion 16. As shown in FIG. 6C, the second elastic locking portion 27 is formed by a relatively long rib protruding from the inner surface of the lower piece portion 25, and the tip 31 is pressed against the rib and elastically locked. These elastic locking actions have the advantage of being accompanied by elastic displacement of the upper and lower pieces 24 and 25 due to the presence of the slits 21, and are effective in the wear of the protrusions of the elastic locking portions 26 and the ribs of the elastic locking portions 27 themselves. Can be prevented.
[0015]
The restricting protrusion 16 protrudes from the inner surface of the lower piece portion 25 that faces the protrusion that is the first elastic locking portion 26. In terms of shape, it protrudes in an approximately inverted L shape, the horizontal portion at the tip protrudes into the escape portion 17, and a predetermined gap is secured between the upper piece portion 24 and the upper portion 24. This gap receives a load that the table body 1 is to rotate further upward from the use position, and when the load reaches a certain design value, the tip 31 of the shaft 3 is accompanied by the elastic displacement of the lower piece 25. Is set to a dimension that allows the guide groove 20 to escape from the guide groove 20 to the escape portion 17 side through the tip of the restriction projection 16. In other words, the breakage preventing means 15 of the embodiment has a configuration in which the restricting projection 16 allows the tip 31 to escape from the guide groove 20 to the escape portion 17 side by elastic displacement of the lower piece portion 25 or elastic displacement of the upper and lower piece portions 24 and 25. is there. However, such a breakage prevention means 15 is formed by, for example, forming the restricting protrusion 16 on the elastic protrusion and allowing the tip 31 to escape from the guide groove 20 to the escape portion 17 using the elastic displacement of the elastic protrusion. Is also possible. However, in this case, the elastic protrusion is easily worn or deteriorated. Further, the escape portion 17 is formed in a groove shape as an extension of the guide groove 20, but may be any shape such as a recess in which the tip 31 falls.
[0016]
The shaft 3 is a round metal wire satisfying a predetermined rigidity, and the whole piece is bent into a generally U shape, and an intermediate piece portion connecting the two piece portions 32 is used as the tip 31. The length is a dimension that slightly protrudes from the rear edge of the table body 1 from the first elastic locking portion 26 in a state where the table body 1 is disposed at the use position as shown in FIG. A diameter is a dimension which can move the guide groove 20 or the escape part 17. Both the pieces 32 are provided so as to gradually widen the distance toward the ends, and each end 32 is a shaft portion 33 bent outward.
[0017]
Either the bracket 4 or the cover member 5 is a resin molded body. As shown in FIG. 7, the flange portion 41 on both sides of the bracket 4 is integrated through upper and lower connecting portions 42, 43, etc., and an opening hole 44 is formed between the upper and lower connecting portions 42, 43. A pair of cam portions 45 are provided on both upper sides. Both flange portions 41 are provided with a hole 46 penetrating in the thickness direction and a recessed portion 47 having a concave portion on the lower surface side. From the standing wall 48 located on both sides of the opening hole 44, the flange portion 41 is laterally extended. The shaft hole (hole half body) 49 is provided. The cover member 5 shown in FIG. 8 is disposed in the recess 47. The shaft hole 49 pivotally supports the shaft portion 33 with the shaft hole (hole half body) 52 of the cover member 5. The interval between the standing walls 48 is narrower than the dimension between the end portions of the two pieces 32. In addition, the upper connecting portion 42 is formed with a middle portion cut out to be low, and the lower connecting portion 43 has a horizontal plate shape. As shown in FIG. 7B, the upper connecting portion 42 has a cam shape in which a portion 42a that is lowered from the top to the bottom is inclined, and when the shaft 3 receives a certain load (that is, a shaft tip 31 described later is Immediately before getting over the restricting projection 16), the corresponding piece of the shaft 3 is bent inward as shown in FIG. 7C so as to be movable from the top to the bottom of the portion 42a. The cam portion 45 protrudes in an arc shape with the shaft hole 49 as the center in the state of FIG. 7D, and the rotation of the piece portion 32 between the upper end of the arc and the corresponding portion of the upper connecting portion 42 is restricted (hereinafter referred to as “the cam portion 45”). The rotation of the table main body 1 is restricted at the use position), and the rotation of the piece 32 between the lower end of the arc and the corresponding portion of the lower connecting portion 43 is restricted (hereinafter referred to as the rotation of the table main body 1 at the storage position). Called regulation). That is, both the piece portions 32 of the shaft 3 are slid while being pressed against the cam surface of the corresponding cam portion 45, and are held by being restricted in rotation at the use position and the storage position of the table main body 1 described above. In addition, the above cover member 5 is integrally formed in the bracket 4, and can also be abbreviate | omitted.
[0018]
The table main body 1, the bracket 4, and the shaft 3 can be assembled in the following procedure. The bracket 4 is assembled to the seat back 9 by inserting a stopper 55 such as a screw through the hole 46 and the through hole 51 and fixing the bracket 5 to the arrangement portion 9a from the state in which the cover member 5 is incorporated. At the same time, the table body 1 is assembled to the arrangement portion 9a via the hinge member 6 in the manner described above. Thereafter, the shaft 3 has the one piece 32 passed through the guide groove 20 and the tip 31 is positioned in the guide groove 22, and then the interval between the two pieces 32 is reduced. It is inserted into the pivot hole formed by the holes 49 and 52. Then, the table body 1, together with Ru are gills rotated switched via the shaft 3 to be rotated held on the bracket 4 is held in a respective rotation position. This rotation range is the range of the two positions shown in FIG. The holding force is proportional to the spring pressure generated when the shaft 3 narrows both the pieces 32 and the pressure contact force generated between the cam portion 45.
[0019]
(Main operation) An example in which the above table is incorporated in the seat 7 of FIG. 2 will be described. When using the table, the occupant of the rear seat 7 performs a rotation operation via the hinge portion 6 so as to lift the table body 1 from the storage position as shown in FIG. Then, the table body 1 is rotated from the storage position {circle around (1)} in FIG. 1 to the use position {circle around (2)} with the movement of the shaft 3 along the guide groove 20 and held in the use position via the shaft 3 and the bracket 4. Is done. That is, in this process, the shaft 3 is rotated from the lower position in FIG. 7D to the upper position while pressing the cam portion 45 against the bracket 4 as described above. The distal end 31 of the shaft 3 is moved along the guide groove 20 by releasing the elastic locking state by the second elastic locking portion 27 at the storage position {circle around (1)} in FIG. Thereafter, the projection is moved over the protrusion of the first elastic locking portion 26 by the turning operation force and is locked between the protrusion and the restricting protrusion 16. This corresponds to the use position {circle around (2)} in FIG. In this use position, the table body 1 receives a load of an article or the like placed thereon by the holding force between the shaft 3 and the bracket 4 described above. The table body 1 is switched from the use position to the storage position by the reverse rotation operation as described above.
[0020]
From the above-mentioned use position, it is assumed that the occupant of the front seat 7 does not know that the table body 1 of the rear seat 7 is in the use position as shown in FIG. . In that case, the table main body 1 in the use position hits the seat cushion 8 (the same applies to the luggage on this) and receives an excessive load in the upward direction. When the load reaches a set value or more, the tip 31 of the shaft 3 is released from the guide groove 20 to the escape portion 17 via the restricting protrusion 16, and further upward movement of the table body 1 is allowed. The That is, in this process, as schematically shown in FIGS. 1 and 6 (d), first, when the table body 1 is subjected to an excessive load upward, the tip 31 causes the restricting protrusion 16 in FIG. 6 (d). Pushing to the right, the lower piece 25 (the upper piece 24 may be somewhat elastically deformed) is elastically displaced by the pushing force. The tip 3 moves from the enlarged gap between the tip of the restricting projection 16 and the upper piece 24 to the escape portion 17 (position 4 in each figure) as shown in position 3 in each figure by this elastic deformation. Will be. As a result, it is possible to prevent the situation of table breakage as in the prior art. For example, the table body 1 pushes the vicinity of the tip 31 of the shaft 3 and forcibly deforms the lower piece 25 to the position (3) in each figure with a force corresponding to the excessive load force. By returning to position (4) in the figure, it can be used normally again.
[0021]
The present invention is embodied as in the basic form described above. However, except for the technical elements described in claim 1, the details are modified, and additional functions such as a cup holder are added as appropriate. Is.
[0022]
【The invention's effect】
As described above, in the seat table according to the present invention, in addition to the fact that the rotation of the table body is favorably performed along the guide groove, the breakage prevention means even if the mode shown in FIG. Therefore, there is no possibility of damaging the conventional table body. Further, the breakage prevention means can be easily realized without sacrificing weight reduction or usability. For this reason, this invention can improve quality and reliability with respect to a conventional table.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an overall operation of a seating table according to an embodiment.
FIG. 2 is an installation example of the table of the present invention, and is a conceptual diagram showing the use position and storage position of the table body and the operation of the present invention.
3 is a state diagram seen from the directions of arrows A and B in FIG.
4 is a state diagram seen from the directions of arrows C, D, and E in FIG. 2;
FIG. 5 is a bottom view and a partial cross-sectional view of the table main body.
FIG. 6 is a cross-sectional view and an enlarged view of a main part of the table main body.
7 is a view showing the bracket of FIG. 1; FIG.
FIG. 8 is a view showing a cover member for the bracket.
FIG. 9 is a view showing the shaft of FIG. 1;
[Explanation of symbols]
1 ... Table body (11 is upper surface, 12 is lower surface, 13 is mounting part)
3 ... Shaft (31 is the tip, 32 is both pieces, 33 is the shaft)
2 ... rail part (20 is a guide groove, 21 is a slit, 26 and 27 are elastic locking parts)
4 ... Bracket (41 is a mounting part, 45 is a cam part, 49 is a shaft hole)
5 ... Cover member (52 is a shaft hole)
6 ... Hinge member (hinge part)
7 ... Seat (8 is a seat cushion, 9 is a seat back, 9a is an arrangement part)
15 ... Damage prevention means (16 is a restricting projection, 17 is a relief)

Claims (5)

The table body is attached to a seat back whose seat angle is adjusted so as to be pivotable up and down via a hinge portion, and is pivoted downward by a rigid shaft supported so as to be pivotably held via a mounting bracket. In the seating table that is switched and held in the storage position and the use position that is rotated upward from the storage position and becomes substantially horizontal,
The table body is provided on the lower surface, and receives a load to turn further upward from the use position together with a guide groove for guiding the movement of the tip of the shaft, and when the load becomes a set value or more, A breakage preventing means for allowing the shaft to escape from the corresponding portion of the guide groove and allowing upward rotation ;
The seating table according to claim 1, wherein the breakage preventing means includes an escape portion that is connected to the guide groove and receives the tip of the shaft from the guide groove via a restricting projection . It said table body has a rail portion which protrudes on the lower surface to form the guide groove, claim 1 with a resilient displacement of the rail section when the tip of the shaft goes over the regulating protrusion from the guide groove Table for seat as described in. The seat table according to claim 1 or 2 , wherein the rail portion is provided in a state where a slit is provided outside the lower surface of the table body. The guide groove, either the tip of the shaft of the first and second claims 1 to 3 which has an elastic engaging portion which respectively releasably locking use position and at the storage position of the table body Crab seat table. The shaft is bent into a substantially U shape, and has a shaft portion that is bent outward at both ends of the U shape. On the other hand, the bracket is assembled so that the shaft can be rotated and pressed against a corresponding portion of the shaft. The seat table according to any one of claims 1 to 4, further comprising a pair of cam portions for guiding the shaft to a rotation restricting position.

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