JPS6239744Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a chair used in the front seats of automobiles, and in particular to a chair in which the seat body is divided into two parts, front and back, and the depth dimension of the seating surface can be adjusted by moving the front seat part back and forth.

Conventionally, in this type of chair, as shown in FIGS. 1a, b, and c, a seat body 2 is disposed approximately horizontally on the lower front side of a backrest 1, and guide portions 3 on both sides are positioned between the seat body 2 and the seat body 2. It is composed of front and rear seat parts 4 and 5 which are divided into front and rear parts, and the front seat part 4 can be moved back and forth by an appropriate means (not shown) so as to move toward and away from the rear seat part 5. The depth of the seating surface can be adjusted so that the seated person can sit shallowly or deeply.

By the way, in such a chair, the front and rear seat parts 4 and 5 of the seat body 2 are conventionally sewn independently.
It is covered with skin materials 6 and 7. For this reason, when the front seat part 4 is moved forward to increase the depth dimension of the seat body 2, the front seat part 4 and the rear seat part 5
A large vertical gap was created between the seat and the seat, which caused problems such as poor appearance and seating comfort, and small items etc. falling to the bottom.

Therefore, the applicant proposed the second chair in the above-mentioned chair.
As shown in Figures a, b, and c, we thought of covering both the front and rear seat parts 4 and 5, which are divided into parts, with a series of skin materials 8 to eliminate the gap, but, however, the front seat part 4 It is fine if the front seat part 4 is moved forward to the maximum distance to move it away from the rear seat part 5, but if the front seat part 4 is moved backward to approach the rear seat part 5, the skin material 8 will become loose. The appearance of the seating surface was very poor, and there were problems with the seating comfort.

This idea was created in view of the above circumstances, and it is possible to adjust the front seat of the seat body by moving it back and forth relative to the rear seat, and even when the front seat is moved forward, it does not penetrate vertically between the front seat and the rear seat. It has an excellent appearance, with no gaps occurring, and even when the front seat is moved backwards to approach the rear seat, the skin material does not loosen or loosen, and the skin material always maintains a constant tension. To provide an excellent chair that has a good appearance and is comfortable to sit on.

In other words, this invention provides a chair in which the depth of the seating surface of the seat body can be adjusted by allowing the front seat to move forward and backward within a predetermined range using a link device that can be operated by an external handle relative to the back seat. A series of skin materials whose depth dimension has been increased in anticipation of the forward movement of the front seat portion is stretched over both the front and rear seat portions, and a tensioning mechanism is provided to prevent the skin materials from loosening. The mechanism includes a pair of vertical links that are pivotally connected in an inverted V shape by connecting their upper ends with pins, and are arranged between the front and rear seat parts, and the top sides of the upper ends of both vertical links are connected to the back surface of the skin material. The lower end of one of the vertical links is pivotally connected to a support rod that is erected and fixed from the lower frame of the seat body, and the lower end of the other vertical link is connected to the movable part of the link device. When the front seat is moved backwards, both vertical links open wide to allow the front and rear seats to move forward.
Pulling in the slack part of the skin material between the rear seat parts,
The present invention is characterized in that, when the front seat portion moves forward, both vertical links are mutually contracted and raised to release the retraction of the skin material. With this, regardless of the adjustment of the front and back movement of the front seat, a series of skin materials are stretched over both the front and rear seats, so there is no vertical gap between the front and rear seats. The tension mechanism ensures that the upholstery is always maintained at a constant tension without loosening, making the chair extremely stylish and comfortable to sit on.

An embodiment of this invention will be described below with reference to FIGS. 3 to 6. The overall external configuration is the same as that shown in FIG. 2, so the drawing is omitted. In other words, a series of skin materials 8 are stretched over both the front and rear seat parts 4 and 5, which are divided into two parts,
The front seat part 4 is movable back and forth so as to approach and separate from the rear seat part 5.

As shown in FIGS. 3 to 5, a link device 9 that can be operated by an external handle is provided at the bottom of the seat body as a means for moving the front seat portion 4 back and forth. That is, fixing pins 10 and 10' are provided on the rear seat portion 5, respectively.
A pair of left and right guide plates 11, 11' are provided by fixing the rear end portions with
The front seat part 4 is inserted into each front end side long hole 12, 12' of 1, 11'.
More protruding slide pins 13, 13' are slidably fitted, and the front seat portion 4 is guided so as to be movable back and forth within the range of the elongated holes 12, 12'. Further, a pair of left and right horizontal links 14, 14' are attached to the lower sides of the left and right guide plates 11, 11' by slidingly fitting the base end long holes 14a into the rear end side fixing pins 10, 10'. on the other hand, the front end side slide pins 13, 13'
A pair of left and right horizontal links 15, 15' are attached by pivoting their respective base ends to the left and right front and rear horizontal links 14, 15 and 14', 1.
5' are pivotally connected at their tips by pins 16, 16'. Further, on the right side of the lower frame 17, a screw rod 19 having a dial-type handle 18 at the outer end is installed with the tip facing leftward, and a nut 20 is screwed into the screw portion 19a on the tip side of the screw rod 19. The nut 20 is fixed at its lower central portion to the pin 16, and a long interlocking rod 22 is arranged from side to side with one end connected to a pin 21 protruding from the upper central portion of the nut 20. The other end of the rod 22 is connected to the pin 16'.

To describe the operation of the link device 9 having such a configuration, when the seated person manually rotates the dial lever 18, the screw rod 19 rotates, and the nut 20 is moved to the right or left by the screw feeding action. The horizontal links 14 and 15 are opened and closed by the pin 16, which moves together with the nut 20, and at the same time, the pin 16' is moved via the interlocking rod 22, and the horizontal links 14' and 15' are opened and closed. With this, the front seat portion 4 can be moved back and forth in a stepless manner.

Next, in addition to the link device 9 described above, tension mechanisms 23 and 23' are provided as shown in FIGS. 5 and 6. These left and right tension mechanisms 23, 23' are made of a skin material 8 stretched over both the front and rear seat parts 4, 5.
A pair of left and right support rods 24 and 24' are arranged near the rear side of the link device 9 and are respectively fixed upright from the lower frame 17, while the left and right support rods 22 of the link device 9 Brackets 25, 25' are provided protruding from both ends, and the upper ends of these support rods 24, 24' are connected to the brackets 25, 25'.
5', a pair of left and right vertical links 26, 26' and 27, 27' are connected to the pins 28, 2 at their base ends.
8', 29, 29', and the left and right vertical links 25, 26 and 2
The tips of 5' and 26' are pivotally connected by pins 30 and 30', and the left and right pins 30 and 30'
A lower end portion of a puller 8a hanging down from the back surface of the skin material 8 is connected to the lower end portion of the puller 8a.

When the link device 9 is operated by operating the handle and the front seat portion 4 is moved backward in order to reduce the depth of the seat body from the state shown in FIG. By Natsu 20
is moved toward the tip of the threaded rod 19, and this moves the left and right links 14, 15 and 14', 15' backward to draw the front seat part 4 toward the rear seat part 5. As a result, the skin material 8 becomes slack due to the excess front and rear dimensions, but as the interlocking rod 22 moves to the left side together with the nut 20 of the link device 9, the brackets 25, 2
Left and right tension mechanisms 23, 2 connected via 5'
The pins 30, 30' are lowered so that the vertical links 26, 27 and 26', 27' at 3' are expanded, respectively, and the puller 8a is thereby pulled down to release the skin material 8 as shown in FIG. 6b. A portion of the skin material 8 is pulled in between the front and rear seat parts 4 and 5 by an amount corresponding to the amount of slack, and the skin material 8 remains constant without any slack on the upper surfaces of the front and rear seat parts 4 and 5. It will be kept under tension. Conversely, when the front seat portion 4 is moved forward by operating the link device 9 in order to increase the depth of the seat body, the left and right tension mechanism 23 is moved in conjunction with the rightward movement of the interlocking rod 22 of the link device 9. ，
23' each vertical link 26, 27 and 26', 2
Stand up so that 7' is shortened, and pin 30,
30', and as a result, the skin material 8 that had been partially drawn in between the front and rear seat parts 4 and 5 is removed from the front seat part 4.
As it moves forward, it will be pulled out while maintaining a constant tension. It should be noted that when the front seat part 4 moves forward to the maximum, the skin material 8 comes to cover the mutual space between the front and rear seat parts 4 and 5 in a substantially flat shape.

Since this invention has been developed as detailed above, the depth dimension of the seating surface can be adjusted by moving the front seat of the seat body back and forth with respect to the rear seat by a simple external operation via the link device. In addition, even when the front seat is moved forward, the entire surface is covered with the skin material, and no vertical gap is created between the front seat and the rear seat. There is no loosening of the skin material even if the surface is
The skin material can always be kept in a constant state of tension, resulting in an excellent product that has a very good appearance and is comfortable to sit on.

[Brief explanation of the drawing]

Figures 1 a, b, and c are perspective views and cross-sectional views of the conventional chair in the open and closed states, and Figures 2 a, b, and c are perspective views of the chair in the open and closed states to explain the technical issues of this invention. 3 to 6 show an embodiment of this invention, FIG. 3 is a plan view of the link device, FIG. 4 is a partially enlarged plan view of the link device,
FIG. 5 is a front view of the link device and the tension mechanism interlocked therewith, and FIGS. 6 a and 6 b are partially enlarged cross-sectional views showing the front and rear seats in the open and closed states. 2...Seat body, 4...Front seat part, 5...Rear seat part, 8
... Skin material, 8a ... Puller, 9 ... Ring device, 10, 10', 13, 13', 16, 16',
21... Pin, 11, 11'... Guide plate, 1
2, 12'...Long hole, 14, 14', 15, 15'
...Horizontal link, 17...Lower frame, 18...
...Dial lever, 19...Screw rod, 20...
Nut, 22... Interlocking rod, 23, 23'... Tension mechanism, 24, 24'... Supporting rod, 25, 25'...
...Bracket, 26, 26', 27, 27'... Vertical link, 28, 28', 29, 29', 30, 3
0'...Pin.

Claims (1)

[Scope of utility model registration request] The seat body is made up of a front seat part and a rear seat part which are separated from each other, and the front seat part can be adjusted back and forth within a predetermined range by a link device that can be operated by an external handle with respect to the rear seat part, and the seat body is seated. In a chair in which the depth dimension of the surface can be adjusted, a series of skin materials whose depth dimension is increased in anticipation of the amount of forward movement of the front seat part is stretched over both the front and rear seat parts, and the skin material is A tensioning mechanism is provided to prevent the material from loosening, and the tensioning mechanism connects a pair of vertical links, which are pivotally connected in an inverted V shape by connecting their upper ends with pins, between the front and rear seat parts. The upper ends of both vertical links are connected to a puller provided on the back surface of the skin material, and the lower end of one of the vertical links is pivotally connected to a support rod that is erected and fixed from the lower frame of the seat body. , the lower end side of the other vertical link is pivotally connected to the movable part of the link device, and when the front seat moves backward in conjunction with the operation of the link device, both vertical links are wide open to each other and the front and rear seats lie down. A chair characterized in that the slack portion of the skin material is drawn in between them, and when the front seat moves forward, both vertical links are mutually contracted and raised to release the skin material from being drawn in.