JPH082302A - Rear table of vehicle seat - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a back table for a vehicle seat that improves the external appearance, facilitates maintenance and inspection work, and achieves weight reduction. [Structure] A rear table 21 for a vehicle seat that is pulled out to the rear of the seat when in use and is stored in the back of the seat when not in use, and includes a table body 22 made of synthetic resin and provided on both side portions of the table body 22 The attachment member 25 is attached to the attachment member 25, the connecting member 23 includes a support shaft 26 fixed to the attachment plate 25 and having a locking groove on the outer periphery thereof, and the support shaft 26 is provided on the inner surface of the upper end portion. A fitting hole 34 to be fitted and a screw hole located in the peripheral portion of the fitting hole 34 and extending in a direction orthogonal to the fitting hole 34 are provided, and are arranged so as to face each other with a space therebetween so that the lower end portion is rotatable with respect to the frame of the seat. A pair of stays 30 supported
And a retaining screw 40 that is screwed into the screw hole of each of the stays 30 and has an outer peripheral portion protruding into the fitting hole 34 and locked in the locking groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear table for a vehicle seat which is provided on the rear surface of a vehicle seat, is pulled out to the rear of the seat when in use, and is stored in the back of the seat when not in use.

[0002]

2. Description of the Related Art A conventional rear table 1 for a vehicle seat
As shown in FIGS. 8 and 9, a pair of aluminum alloy stays 3 and 3 are arranged on the back surface of the seat 2 so as to face each other with a space therebetween, and are rotatably supported at the lower end of the seat 2. .
A table body 4 made of synthetic resin is attached to the upper ends of the pair of stays 3 and 3 so as to be rotatable by a predetermined angle. The table body 4 is pulled out to the rear of the seat 2 and held horizontally like the table body 4A shown in FIG. 8 when in use, and is stored on the back surface of the seat 2 like the table body 4B when not in use. .

The conventional connecting structure of the stay 3 and the table body 4 is constructed as shown in FIG. That is, the shaft 5 is inserted into the table body 4, and the screw hole 6 located at the center is formed on the end surface of the shaft 5 projecting on both sides of the table body 4. As shown in FIG. 9, a stopper 7 is provided on the table body 4 so as to be spaced from the shaft 5.

A non-penetrating fitting hole 8 into which the shaft 5 is fitted is formed on the inner surface of the stay 3, and the stay 3 is located at the center of the stay 3 and the mounting hole 9 for the flat machine screw is provided from the outer surface. Are formed. Further, a concave portion 10 corresponding to the stopper 7 of the table body 4 is formed on the inner side surface.

To assemble the table body 4 to the stay 3, the shaft 5 is inserted through the table body 4 and the shaft 5
Both ends of the stopper 3 are fitted into the fitting holes 8 of the stay 3, and the stopper 7 is inserted into the recess 10. And
A countersunk screw 11 for mounting is inserted into the mounting hole 9 from the side of the stay 3 and screwed into the screw hole 6. This allows the shaft 5
Is fixed to the stays 3, 3 by means of countersunk machine screws 11, and the table body 4 rotates around the shaft 5. The rotation angle is regulated within a range in which the stopper 7 contacts the side surface of the recess 10.

[0006]

However, the above-mentioned back table 1 of the vehicle seat has the following problems. 1. Since the countersunk screws 11 for mounting are tightened from the side of the stay 3, it is difficult to disassemble and assemble in a seat with a window wrinkle where the work space is narrow during maintenance and inspection. 2. Since the head of the countersunk head screw 11 connecting the stay 3 and the table body 4 is exposed to the outside, the external appearance is bad. 3. When the table body 4 is rotated during use and storage, the frictional force between the table body 4 and the shaft 5 acts in the direction of loosening the flat head screw 11 for mounting.
1 may be loosened and fall off, and the table body 4 may come off the stay 3. 4. The stay 3 requires strength, wear resistance in sliding parts, and flame retardancy. Therefore, since the stay 3 is conventionally made of a metal such as an aluminum alloy, it is heavy. This back table 1
Since it is installed in all seats, it is strongly demanded to reduce the weight when it is used for vehicles such as Shinkansen which has many connected vehicles or for aircraft. 5. Since the fitting hole 8 formed in the stay 3 is a so-called non-through hole whose tip is closed, the processing is troublesome and the processing accuracy decreases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the appearance of a vehicle, to facilitate maintenance and inspection work, and to reduce the weight of a vehicle seat. Located on the back table provided.

[0008]

The invention of claim 1 will be described with reference to the reference numerals used in the embodiments. When the invention is used, it is pulled out to the rear of the seat 2 when it is used and is stored on the back surface of the seat 2 when it is not used. A back table 21 of a vehicle seat, which is a synthetic resin table body 22, mounting plates 25 provided on both side surfaces of the table body 22 and attached to the table body 22, and the table body on the mounting plate 25. 22, a coupling member 23 provided with a support shaft 26 fixedly projecting from 22 and having a locking groove 29 on the outer peripheral portion, a fitting hole 34 into which the support shaft 26 is fitted, on the inner surface of the upper end portion, and the fitting hole 34. A pair of stays 30 each having a screw hole 35 located in the peripheral portion of the seat 2 and extending in a direction perpendicular to the periphery of the seat 2 and arranged so as to face each other with a space therebetween and rotatably supported by the frame 2a of the seat 2 at the lower end portion. And these stays 30 Having characterized in that the outer peripheral portion is screwed into the hole 35 and a stopper screw 40 engaged with the locking groove 29 and projects into the fitting hole 34.

A stay 30 according to a second aspect of the present invention includes a table arm 31 having a substrate 31a made of a synthetic resin containing carbon fiber and at least one rising portion 31b provided upright from the substrate 31a, and the table arm 31. Table stopper 32 fixed to the upper end of the base plate 31a of the seat 2 and having a fitting hole 34 and a screw hole 35, and an arm fixed to the lower end of the base plate 31a of the table arm 31 and rotatably supported on the frame 2a of the seat 2. It is characterized in that it is composed of a stopper 33.

[0010]

According to the rear table 21 for a vehicle seat of claim 1, as shown in FIG. 5, the connecting members 23 are fixed to both side surfaces of the table body 22, and the support shaft 26 projects from the table body 22. .

Each support shaft 26 is fitted with a fitting hole 3 for a pair of stays 30.
4, the table body 22 is rotatably supported by the stay 30. Then, as shown in FIGS. 1 and 2, the screw hole 35 is positioned in the vertical direction. Therefore, when the retaining screw 40 is operated in the vertical direction, for example, from above, and screwed into the screw hole 35 of each stay 30, the retaining screw 40
The outer peripheral portion of the projection protrudes into the fitting hole 34 and is locked in the locking groove 29, so that the support shaft 26, that is, the table main body 22 is held in a state in which it does not come off the stay 30 (see FIGS. 5 and 7). The head of the set screw 40 is housed in the screw hole 35. Since the tightening work of the retaining screw 40 is performed from above the wide working space, the tightening work can be easily performed even in the case of a seat by the window where the side working space is narrow.

When the table body 22 is rotated, the outer peripheral portion of the retaining screw 40 slides along the locking groove 29.
This frictional force acts in the axial direction of the retaining screw 40, but does not act in the circumferential direction in which the tightening of the retaining screw 40 is loosened, so that the retaining screw 40 does not come out. Moreover, since the head of the retaining screw 40 does not protrude from the stay 30, the design of the stay 30 is not damaged.

As shown in FIG. 6, the stay 30 of claim 2 is rotatably supported by the table stopper 32 having the fitting hole 34 and the screw hole 35 at the upper end and the frame 2a of the seat 2 at the lower end. Since the arm stopper 33 is connected by the table arm 31, the total weight is reduced. Further, the strength and flame retardancy of the rotating and sliding parts are secured. Further, even if the fitting hole 34 is formed so as to penetrate therethrough, the end face of the fitting hole 34 is closed by the table arm 31 and is not exposed to the outside, so that the fitting hole 34 can be easily machined and the machining accuracy is improved.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A back table 21 for a vehicle seat according to the present invention will be described below with reference to the drawings. First, FIGS.
In the table main body 22, the upper and lower table plates 22a and 22b made of synthetic resin are adhered to each other to have a hollow shape, and a large number of fillings are filled inside. A connecting member 23 is applied to both side surfaces of the table body 22 from the inside, and is integrally fixed by a rivet 24.

The connecting member 23, as shown in FIGS.
A mounting plate 25, a support shaft 26 erected on both ends of the mounting plate 25,
A hole 28 is formed in the center of the stopper 27, into which the rivet 24 is inserted. A locking groove 29 having a semicircular cross section is formed on the outer peripheral portion of the support shaft 26. Further, the support shaft 26 and the stopper 27 project from the table body 22 in a state where the connecting member 23 is attached to the table body 22.

As shown in FIG. 6, the stay 30 has a table arm 31, a table stopper 32 fixed to the upper end of the table arm 31 with an adhesive, and a lower end of the table arm 31 with an adhesive. And an arm stopper 33. Table arm 31
Is made of a synthetic resin containing carbon fibers, that is, carbon fiber reinforced plastics (CFRP) and has a U-shaped cross section.
A rising portion 31b is provided upright at both ends of 1a. The rising portions 31b are for increasing the strength of the table arm 31, and if the strength can be secured, the number of rising portions 31b is not limited to two, and at least one may be formed.

The table stopper 32 is made of an aluminum alloy and has a fitting hole 34 into which the support shaft 26 is fitted, and a screw hole 35 located in the peripheral portion of the fitting hole 34 and extending in a direction orthogonal to the fitting hole 34.
And a recess 36 at a position corresponding to the stopper 27 of the connecting member 23. The arm stopper 33 is made of an aluminum alloy and has a bearing 37 that serves as the center of rotation of the stay 30.
8 and nut 39 are provided. Captive screw 40
Is to be screwed into the screw hole 35 of the stay 30, and a hexagon socket head screw is used in this embodiment.

Next, the procedure for assembling the back table 21 will be described. The pair of stays 30 includes an arm stopper 33.
Bearings 37 are fitted into a rotating shaft portion (not shown) of the frame 2a of the seat 2 and are arranged at intervals (see FIG. 3). When the stay 30 rotates by a predetermined angle, the screw 38
The head of the seat abuts on the frame 2a of the seat 2 and stops. If the position of the screw 38 is adjusted, the rotation angle of the stay 30 changes, so the screw 38 is locked by the nut 39 at an appropriate position.

Next, the table body 22 is held between the pair of stays 30, the support shafts 26 of the connecting members 23 protruding from both sides are fitted into the fitting holes 34 of the stays 30, respectively, and the stopper 27 is recessed. To insert. In this case, stay 3
The 0 screw hole 35 is located on the upper surface. Therefore, stay 30
By operating the driver from above, the retaining screw 40 is screwed into the screw hole 35 and is advanced until the head sinks. Then
The outer peripheral portion of the retaining screw 40 projects into the fitting hole 34 and is locked in the locking groove 29 of the support shaft 26 (see FIGS. 5 and 7). As a result, the support shaft 26 is prevented from coming off, and the table body 22 is connected to the stay 30. When the table body 22 is rotated, the stopper 27 moves in the concave portion 36 and comes into contact with the end face to stop in a horizontal state like the table body 22A shown in FIG.

When the table body 22 is to be stored, when the tip end is lifted up, the stopper 27 comes into contact with the recess 36 and is aligned with the stay 30. Further, when the table body 22 is lifted upward, the table body 22 rotates together with the stay 30 and is stored in the back surface of the seat 2 like the table body 22B shown in FIG.

By the way, when the table body 22 is rotated, the support shaft 26 is also rotated, and the locking groove 29 slides on the side surface of the retaining screw 40. However, since the frictional force due to this sliding acts in the axial direction of the retaining screw 40 and does not act in the direction of loosening the retaining screw 40, that is, in the circumferential direction,
The retaining screw 40 will not come out. That is, the tightening force of the retaining screw 40 may be small, in other words, it may be a small screw, and even if it is a hexagon socket screw without a head, the table body 22 is prevented from coming off from the stay 30. Can be kept in a state. As a result, the head of the retaining screw 40 can be sunk from the stay 30 so as not to project.
The appearance design is improved.

In the stay 30, the table arm 31 is made of synthetic resin containing carbon fiber, that is, carbon fiber reinforced plastic (CFRP), and the rising portion 31 is provided on the substrate 31a.
Since b is provided upright, the strength can be secured, the mass can be reduced, and flame retardance can be achieved. Moreover, since the table stopper 32 and the arm stopper 33 made of aluminum alloy are used for the upper and lower sliding portions,
Wear resistance can also be secured. Further, even when the fitting hole 34 is machined through the table stopper 32, the tip end is closed by adhering it to the table arm 31, so that the fitting hole 34 is processed more than the conventional case in which the non-through hole is machined. The processing is remarkably simplified and the processing accuracy can be improved.

[0023]

The invention of claim 1 is a rear table for a vehicle seat that is pulled out to the rear of the seat when in use and is stored in the back of the seat when not in use. A connecting member provided with mounting plates provided on both side surfaces of the table body and attached to the table body, a support shaft protruding from the table body and fixed to the mounting plate, and a support shaft having a locking groove on the outer peripheral portion, and an inside of the upper end portion The side surface is provided with a fitting hole into which the support shaft is fitted, and a screw hole located in the peripheral portion of the fitting hole and extending in a direction orthogonal to the fitting hole. And a pair of stays that are rotatably supported by the frame of the seat, and retaining screws that are screwed into the screw holes of these stays and whose outer peripheral portions project into the fitting holes and are locked in the locking grooves. Since the head of the retaining screw protrudes from the stay, Since it is possible to improve the external appearance, the retaining screw can be tightened from above, maintenance and inspection work can be easily performed, and the table body can be securely connected. It has an excellent effect.

According to a second aspect of the present invention, the stay is made of a synthetic resin substrate containing carbon fibers and at least one of the substrates is erected from the substrate.
A table arm having individual rising portions, a table stopper fixed to the upper end of the base plate of the table arm and having the fitting hole and the screw hole, and a table stopper fixed to the lower end of the base plate of the table arm to the frame of the seat. Since the arm stopper is rotatably supported, the mass of the stay can be significantly reduced, the fitting hole can be easily machined, and the machining accuracy can be improved. .

[Brief description of drawings]

FIG. 1 is a front view of a back table of a vehicle seat.

FIG. 2 is a plan view.

FIG. 3 is a perspective view showing a state in which a seat is equipped with a back table.

FIG. 4 is a perspective view of a connecting member.

FIG. 5 is an enlarged plan view taken along the line VV in FIG.

FIG. 6 is a front view showing the inner surface of the stay.

FIG. 7 is an enlarged front view taken along the line VII-VII in FIG.

FIG. 8 is a perspective view showing a state in which a back table in a conventional example is installed in a seat.

FIG. 9 is a front view of a rear table of a vehicle seat.

FIG. 10 is a plan view taken along the line XX in FIG.

[Explanation of symbols]

 2 seat 21 back table 22 table body 23 connecting member 24 mounting plate 26 support shaft 29 locking groove 30 stay 31 table arm 31a substrate 31b rising part 32 table stopper 33 arm stopper 34 fitting hole 35 screw hole 40 retaining screw

Claims (2)

[Claims] 1. A rear table for a vehicle seat, which is pulled out to the rear of the seat when in use and is stored in the back of the seat when not in use, the table body being made of synthetic resin and provided on both side surfaces of the table body. And a mounting member attached to the mounting plate, and a connecting member having a supporting shaft protruding from the table body and fixed to the mounting plate and having a locking groove on the outer peripheral portion, and the supporting shaft on the inner surface of the upper end portion. Are fitted with a fitting hole and a screw hole located in the peripheral portion of the fitting hole in a direction orthogonal to the fitting hole. A pair of stays movably supported and a retaining screw screwed into the screw holes of each of the stays and having an outer peripheral portion protruding into the fitting hole and locked in the locking groove are provided. The back table of the vehicle seat. 2. The stay is a table arm made of a synthetic resin containing carbon fiber, and a table arm having at least one rising portion provided upright from the substrate, and the stay is fixed to an upper end portion of the substrate of the table arm. 7. A table stopper having a fitting hole and a screw hole, and an arm stopper fixed to the lower end of the base plate of the table arm and rotatably supported by the frame of the seat. The rear table of the vehicle seat described in 1.