JPH0568733U - Coupling structure of connecting rod and link piece in front pull-out seat - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a connecting structure of a connecting rod and a link piece in a front pull-out type seat which can improve productivity by reducing the number of parts and the number of assembling steps. [Structure] An annular groove 14 formed on the outer peripheral surfaces of both ends of the connecting rod 8 and a protrusion 15 formed on the inner peripheral surface of a bush 15.
Since the axial movement of the bush 15 is restricted only by elastically engaging with c, it is not necessary to use a special locking member such as an E-shaped ring, thus reducing the number of parts and the number of assembly steps. can do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, for example, a rear seat of a one-box car or the like has a two-seat structure of a fixed seat and a movable seat that can be folded upward and can be pulled out forward. The present invention relates to improvement of a connecting structure for connecting one end of a link piece to the left and right ends of a connecting rod provided.

[0002]

[Prior Art]

 In one-box cars and so-called recreational vehicles, it is possible to reduce the fatigue of the occupants and use the rear seat as a bed by changing the seating area from a normal seating area to a rear seating area. There are things I did.

FIG. 4 shows a rear seat having such a structure. Reference numeral 1 denotes a fixed seat attached to a floor surface (not shown) or a guide rail fixed to the floor. A seat back 3 having a movable armrest 2 is provided with a reclining hinge 4 so as to be tiltable rearward.

A movable seat 5 having a size capable of covering the fixed seat 1 from the upper portion is provided. One end of a pair of left and right (in the traveling direction of the vehicle) link pieces 6 is provided on both sides of an intermediate portion of the fixed seat 1. By pivotally attaching the other end of the movable seat 5 to the rear surface of the movable seat 5, the folding position shown by the solid line and the drawn position shown by the imaginary line can be moved in parallel. ..

In the pulling-out position, the upper surfaces of the fixed sheet 1 and the movable sheet 5 are substantially flush with each other, and the front portion of the movable sheet 5 is rotated downward by a stopper device (not shown). Have been blocked.

The connecting portions of the link pieces 6 and the fixed sheet 1 have a coupling structure as shown in FIG. 5 (only one of the left and right configurations is shown).

That is, a connecting rod 8 extends in the left-right direction through a pair of left and right seat (cushion) frames 7 provided in the lower portion of the fixed seat 1 and facing the front-rear direction. It is rotatably supported by the seat frame 7 via a bush 9 made of a hard synthetic resin fitted over the shaft end portion.

The bush 9 is restricted from moving in the axial direction by fitting an E-shaped ring (snap ring) 11 in an annular groove 10 formed in the axial end portion of the connecting rod 8.

The end portion of the link piece 6 is fitted into the angular shaft portion 12 continuous with the shaft end of the connecting rod 8 so as to be incapable of relative rotation, and is then formed at the shaft end so that a bolt hole is formed in a screw hole (not shown). It is prevented from coming off by screwing 13 on. As a result, both link pieces 6 are linked together with the connecting rod 8.

The bush 9 prevents the seat frame 7 and the connecting rod 8 from slidingly contacting each other with metal, prevents the sliding contact portion from being prematurely worn and rattling noise, and can be smoothly rotated. It acts to move.

[00011]

[Problems to be solved by the device]

 When the E-shaped ring 11 is used to restrict the axial movement of the bush 9 as in the conventional structure described above, not only the number of parts increases and the supply and management thereof become complicated, but also However, the work using the dedicated tool is troublesome, and the assembly man-hour increases, which causes the productivity to decrease.

The present invention has been made in order to solve the above-mentioned problems, and by reducing the number of parts, the number of assembling steps can be reduced and the productivity can be improved. The purpose is to provide a connecting structure between the connecting rod and the link piece.

[0013]

[Means for Solving the Problems]

 To achieve the above object, the present invention includes a fixed seat and a movable seat that is foldable and can be pulled out forward, and at least one end of a pair of left and right link pieces is provided with a seat frame of the fixed seat. The connecting rod and the link piece are connected to each other when the two sheets are connected to each other by pivotally attaching the other ends to the left and right ends of the connecting rod that penetrates the movable seat. An annular groove is formed on one of the outer peripheral surfaces of both ends of the connecting rod and the inner peripheral surface of the bush that can be fitted onto the outer peripheral surface of the connecting rod. By elastically deforming and fitting at both ends of the connecting rod, the protrusions and the annular groove are elastically engaged with each other, and the ends of each link piece are connected to both ends of the connecting rod by appropriate fixing means. To Is characterized in that the binding.

[0014]

[Action]

 The axial movement of the bush is restricted only by elastically engaging the annular groove formed on either one of the connecting rod and the bush fitted on the connecting rod and the projection formed on the other. Since it is not necessary to use a special locking member such as an E-shaped ring, the number of parts and the number of assembly steps can be reduced.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The same members as those of the conventional example shown in FIGS. 4 and 5 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1 and FIG. 2, as in the conventional case, the connecting rod 8 penetrates through the substantially intermediate portion of the fixed seat 1 in the left-right direction, and both left and right ends thereof are inside the fixed seat 1. It penetrates through the inward U-shaped seat frames 7, 7 that are long on the left and right sides and that extend forward and backward.

An annular groove 14 having a required width is formed on the outer peripheral surfaces of both end portions of the connecting rod 8 slightly inward of the penetrating portion with the seat frame 7.

As shown in FIG. 3, each end of the connecting rod 8 has a cylindrical bearing portion 15a having an inner diameter substantially equal to the outer diameter of the connecting rod 8, and the outer peripheral surface of the bearing portion 15a is 18 A long groove 15b is formed by notching the position facing 0 ° from the base end portion to the tip end portion in the axial direction, and further, at the tip end of the bearing portion 15a, an arc-shaped projection 15c directed in the radial direction (inward). , 15c, which are made of hard synthetic resin, are externally fitted so as to pass through the gap between the outer peripheral surface of the connecting rod 8 and the through hole of the seat frame 7.

At the time of this external fitting, the bush 15 has an annular groove formed by the projection 15 c formed on the connecting rod 8 when the flange 15 d continuously provided at one end of the bush 15 is brought into contact with the outer surface of the seat frame 7. By elastically engaging with 14, the axial movement is restricted.

As in the conventional case, one end of the link piece 6 is fixed to the square shaft portions 12 formed at both ends of the connecting rod 8 and is in proximity to or in contact with the outer surface of the flange portion 15d of the bush 15. Are fitted together. Reference numeral 13 is a bolt for fixing the link piece 6 screwed into female screw holes (not shown) at both ends of the connecting rod 8.

As described above, in the above-described embodiment, since the bearing portion 15a of the bush 15 is formed with the pair of long grooves 15b that are oriented in the axial direction, the bush 15 is easily elastically deformed in the radial direction. When fitting the both ends of the connecting rod 8, the bushes 15 are previously fitted into the through holes of the left and right seat frames 7 and the connecting rod 8 is forcibly inserted into the bush 15 from the side. If one of the left and right bushes 15 is fitted to one end of the connecting rod 8 in advance, and the other end of the connecting rod 8 is forcibly inserted into the other bush 15 fitted in the seat frame 7 in advance, The bearing portion 15a is elastically deformed in the radial direction by the amount of the protrusion 15c formed, and when the annular groove 14 of the connecting rod 8 reaches the position of the protrusion 15c, the bearing portion 15a automatically elastically engages. , Axial movement is restricted. Therefore, the conventional E-shaped ring and the step of fitting it are omitted.

In the above embodiment, the annular groove 14 is formed on the connecting rod 8 side and the projection 15c is formed on the bush 15 side, but it is of course possible to form them on the opposite side. is there.

[0023]

[Effect of the device]

 According to the present invention, since the bush is prevented from moving in the axial direction without using the E-shaped ring as in the conventional art, the number of parts and the number of assembling steps are reduced, and the link piece and the connecting rod are connected. The connection work of will be efficient and productivity will be improved.

[Brief description of drawings]

FIG. 1 is an external view of a front drawer type seat according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part taken along the line AA in FIG.

FIG. 3 is a perspective view of a bush used in the present invention.

FIG. 4 is a side view of a front pull-out seat having a conventional structure.

5 is an enlarged vertical sectional front view of the main part on the left side along the line BB in FIG.

[Explanation of symbols]

 1 Fixed Seat 2 Arm Rest 3 Seat Back 4 Reclining Hinge 5 Movable Seat 6 Link Piece 7 Seat Frame 8 Connecting Rod 12 Square Shaft 13 Bolt (Fixing Means) 14 Annular Groove 15 Bushing 15a Bearing 15b Long Groove 15c Projection 15d Collar 15d

Claims (1)

[Scope of utility model registration request] 1. A left and right end of a connecting rod that includes a fixed seat and a movable seat that is foldable above the fixed seat and that can be pulled out forward, and at least one end of a pair of left and right link pieces penetrates a seat frame of the fixed seat. Similarly, the other end is pivotally attached to both left and right side portions of the movable seat to thereby connect the two seats to each other. A ring-shaped groove is formed on either one of the surface and the inner peripheral surface of the bush that can be externally fitted to this surface, and a protrusion is formed on the other surface, and both ends of the connecting rod are elastically deformed in the radial expansion direction. By engaging the projections with the annular recessed groove elastically, and connecting the ends of the link pieces to both ends of the connecting rod with appropriate fixing means. Coupling structure of the connecting rod and the link piece in can-out seat.