JP5955179B2 - Frame and shaft member mounting structure and seat structure - Google Patents

Description

  The present invention relates to a frame and shaft member mounting structure and a seat structure.

  Conventionally, in a seat structure of a vehicle or the like, link members such as a reclining mechanism and a seat surface position adjusting mechanism are rotatably attached to a metal frame (see, for example, Patent Document 1). The shaft member that rotatably supports the link member and the frame are integrated by crimping each other.

International Publication No. 2012/049725

In recent years, development of a seat structure using a resin frame has been advanced. If the shaft member is attached to the resin frame by caulking similarly to the metal frame, the resin frame may be deformed. Since the resin frame has a lower rigidity than the metal frame, if the resin frame is deformed, the strength is significantly reduced.
Accordingly, an object of the present invention is to enable the attachment of a shaft member to a resin frame while suppressing deformation of the resin.

In order to solve the above problems, the frame and shaft member mounting structure according to the invention described in claim 1 includes:
A resin frame having a through hole;
A pin member that fits into the through hole of the frame;
A shaft member that is coaxially attached to the pin member;
A movable member pivotally supported by the shaft member along the frame,
The pin member is provided with a convex portion protruding along the axial direction,
In the shaft member, a recess into which the projection is inserted is recessed along the axial direction,
A welding mark by laser welding is formed along the periphery of the convex portion at a boundary between the convex portion of the pin member and the concave portion of the shaft member.

The invention according to claim 2 is the attachment structure of the frame and shaft member according to claim 1,
A concave portion surrounding the welding mark is formed on the opposite side of the pin member from the side on which the convex portion is provided.

The invention according to claim 3 is the attachment structure of the frame and the shaft member according to claim 1 or 2,
The concave portion of the shaft member extends to a position passing through the movable member, and the convex portion of the pin member fitted in the concave portion extends to a position facing the movable member,
The welding mark is formed up to a position facing the movable member.

Invention of Claim 4 is the attachment structure of the flame | frame and shaft member as described in any one of Claims 1-3,
The pin member is characterized in that a step portion for accommodating the frame is formed in order to sandwich the frame together with the shaft member.

The invention according to claim 5 is the attachment structure of the frame and shaft member according to claim 4,
The step portion, the frame, and the welding trace are present on the same plane.

The invention according to claim 6 is the frame and shaft member mounting structure according to any one of claims 1 to 5,
The weld mark is formed in a zigzag manner along the boundary.

The invention described in claim 7
It is a seat structure having resin left and right cushion frames having through holes and pipe-shaped connecting members assembled to the left and right cushion frames through the through holes,
A pin member that fits into the through hole;
A shaft member that is coaxially attached to the pin member and fits into the connecting member;
A movable member supported by the shaft member along the cushion frame,
The pin member is provided with a convex portion protruding along the axial direction,
In the shaft member, a recess into which the projection is inserted is recessed along the axial direction,
A welding mark by laser welding is formed along the periphery of the convex portion at a boundary between the convex portion of the pin member and the concave portion of the shaft member.

The invention according to claim 8 is the seat structure according to claim 7,
The connecting member, the shaft member, and the pin member are arranged coaxially.

The invention according to claim 9 is the seat structure according to claim 7 or 8,
An outer diameter of a shaft portion that pivotally supports the movable member in the shaft member is smaller than an outer diameter of the connecting member.

The invention according to claim 10 is the sheet structure according to any one of claims 7 to 9,
The concave portion of the shaft member is provided to the inner side of the end portion of the connecting member.

The invention according to claim 11 is the seat structure according to any one of claims 7 to 10,
The convex part of the pin member is provided to the inner side of the end part of the connecting member.

  According to the first aspect of the present invention, the pin member that fits into the frame and the shaft member that pivotally supports the movable member are integrated with a welding mark formed by laser welding at the boundary between each convex portion and the concave portion. Therefore, it is possible to attach the shaft member to the frame without caulking. Therefore, even when the frame is made of resin, deformation when attaching the shaft member can be suppressed.

  Here, laser welding is performed by irradiating a laser beam from the side opposite to the side where the convex portion is provided on the pin member, thereby along the periphery of the boundary between the convex portion of the pin member and the concave portion of the shaft member. Forming weld marks. That is, as in the invention described in claim 2, when the concave portion surrounding the welding mark is formed on the opposite side of the pin member from the side where the convex portion is provided, the penetration depth of the laser beam is increased. It is possible to make it easier to form the welding marks on the back side.

  According to invention of Claim 3, the convex part of the pin member fitted to the recessed part of the shaft member extends to the position facing the movable member, and the weld mark is formed to the position facing the movable member. Therefore, the part which supports a movable member will be buried with a shaft member, a pin member, and a welding trace. Therefore, the movable member can be stably supported.

  According to the fourth aspect of the present invention, since the step portion that accommodates the frame is formed in the pin member, the frame is positioned if the frame is stored in the step portion and sandwiched between the shaft member and the pin member. Is possible.

  According to the fifth aspect of the present invention, since the stepped portion, the frame, and the welding mark are present on the same plane, the frame is configured so that the weight of the shaft member, the movable member, and the connecting member acting on the pin member is vertical. As a result, the mounting rigidity of the pin member to the frame can be increased.

  According to invention of Claim 6, since the welding trace is zigzag formed along the said boundary, the full length of a welding trace can be lengthened, and a shaft member and a pin member are integrated more firmly. be able to.

According to invention of Claim 7, the pin member fitted to a cushion frame and the shaft member which pivotally supports a movable member are the welding traces formed by laser welding in the boundary of each convex part and a recessed part. Since they are integrated, the shaft member can be attached to the cushion frame without caulking. Therefore, even when the cushion frame is made of resin, deformation when attaching the shaft member can be suppressed.
If the deformation can be suppressed, the rigidity of the cushion frame itself can be ensured.

  According to invention of Claim 8, since a connection member, a shaft member, and a pin member are arrange | positioned on the same axis | shaft, it can be assembled compactly compared with the case where each is arrange | positioned on a different axis | shaft. It becomes.

  According to invention of Claim 9, since the outer diameter of the axial part which pivotally supports the movable member in a shaft member is formed smaller than the outer diameter of a connection member, the enlargement of a shaft member can be suppressed. .

  According to the tenth aspect of the present invention, since the concave portion of the shaft member is provided to the inside of the end portion of the connecting member, the weight can be reduced while maintaining the strength of the shaft member to some extent.

  According to invention of Claim 11, since the convex part of a pin member is provided inward rather than the edge part of a connection member, the support rigidity of a shaft member and a pin member by supporting a connection member can be improved. it can.

It is a side view showing the schematic structure of the sheet structure concerning this embodiment. It is sectional drawing which shows schematic structure of the attachment structure of the flame | frame and shaft member which concerns on this embodiment. It is a perspective view which shows schematic structure of the attachment structure of the flame | frame and shaft member of FIG. It is a front view which shows schematic structure of the welding trace which concerns on this embodiment. It is a front view which shows the modification of a welding mark.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a side view showing a schematic configuration of a sheet structure according to the present embodiment. The seat structure according to the present embodiment is a seat structure such as a vehicle seat. As shown in FIG. 1, the seat structure 100 includes a slide rail 102, a bottom seat 103, a backrest 104, a reclining mechanism 105, and the like. The lower end portion of the backrest 104 is connected to the rear end portion of the bottom seat 103 by the reclining mechanism 105, and the backrest 104 is erected at the rear end portion of the bottom seat 103. The backrest 104 can be tilted in the front-rear direction with respect to the bottom seat 103 by the reclining mechanism 105. The reclining mechanism 105 locks the backrest 104 to the bottom seat 103 to stop the tilting of the backrest 104, releases the lock, and biases the backrest 4 in a direction to tilt the backrest 104 forward.

  The bottom sheet 103 includes a pair of left and right frames 2 and a pipe-like connecting member 6 that connects the pair of left and right frames 2. The frame 2 and the connecting member 6 are connected via a pin member 3 and a shaft member 4 which will be described later.

  FIG. 2 is a cross-sectional view showing a schematic configuration of the frame and shaft member mounting structure according to the present embodiment, and FIG. 3 is a perspective view showing a schematic configuration of the frame and shaft member mounting structure. As shown in FIGS. 2 and 3, the mounting structure 1 of the frame 2 and the shaft member 4 includes a frame 2, a pin member 3 that engages with the frame 2, and a shaft member that is coaxially attached to the pin member 3. 4 and a link member 5 as a movable member that is pivotally supported by the shaft member 4 along the frame 2.

The frame 2 is a cushion frame or the like of the seat structure 100, and is molded from resin. A through hole 21 into which the pin member 3 is fitted is formed in the frame 2.
The pin member 3 includes a pin head 31 and a columnar convex portion 32 protruding in the axial direction from the pin head 31. The pin head 31 is provided with a fitting portion 33 that fits into the through hole 21 of the frame 2 and a step portion 34 that accommodates the frame 2. The width H of the stepped portion 34 is set to the same length as the thickness of the frame 2. A concave portion 35 having an inner diameter larger than the outer diameter of the convex portion 32 is formed on the opposite side of the pin head 31 from the side where the convex portion 32 is provided.

The shaft member 4 is attached to a pipe-shaped connecting member 6 that is bridged between the left and right frames 2. The connecting member 6 is assembled to the left and right frames 2 through the through holes 21.
The shaft member 4 includes a fitting portion 41 that is fitted to the end portion of the connecting member 6, a shaft portion 42 that pivotally supports the link member 5, and a concave portion 43 into which the convex portion 32 of the pin member 3 is inserted. ing.
The fitting part 41 is formed in a columnar shape, and a first protrusion 44 is provided on a part of the outer periphery thereof. The first protrusion 44 is engaged with a notch 61 provided at the end of the connecting member 6 to restrict the rotation of the shaft member 4 in the circumferential direction. A rib 45 extending in the circumferential direction is provided at the proximal end portion of the fitting portion 41. Since the rib 45 engages with the end of the connecting member 6, the shaft member 4 is positioned. Further, a second protrusion 46 protruding in an arc shape is provided on the surface of the rib 45 opposite to the connecting member 6.
The shaft portion 42 is formed in a cylindrical shape on the same axis as the fitting portion 41. The outer diameter of the shaft portion 42 is smaller than the outer diameter of the connecting member 6 and larger than the inner diameter of the through hole 21 of the frame 2. Thereby, the end surface of the shaft portion 42 comes into contact with the fitting portion 33 of the pin member 3 and the frame 2.

The concave portion 43 is recessed in a cylindrical shape from one end surface of the shaft member 4 along the axial direction of the fitting portion 41 and the shaft portion 42. The recess 43 passes through the link member 5 and extends to the inside of the end of the connecting member 6. When the convex portion 32 of the pin member 3 is fitted into the concave portion 43, the convex portion 32 faces the link member 5 and extends to the inside of the end portion of the connecting member 6. A welding mark 7 by laser welding is formed at a boundary L between the concave portion 43 and the convex portion 32 of the pin member 3. The welding mark 7 has a wedge shape in which the outer side is thicker and tapered toward the inner side in order to irradiate laser light from the outer side of the frame 2 during welding. The weld mark 7 is formed up to a position facing the link member 5. Thereby, the welding mark 7, the step part 34, and the frame 2 exist on the same vertical plane (plane).
FIG. 4 is a front view showing a schematic configuration of the welding mark 7. As shown in FIG. 4, the welding mark 7 is disposed in the concave portion 35 and is formed in a circular shape around the convex portion 32, that is, along the boundary L.

  The link member 5 is a link member that forms part of, for example, a reclining mechanism 105 of the seat structure 100 or a seating surface position adjusting mechanism. The link member 5 is pivotally supported by the shaft portion 42 of the shaft member 4 and rotates with the shaft portion 42 as a rotation axis. One surface of the link member 5 is in contact with the second protrusion 46 of the shaft member 4. A gap is formed between the link member 5 and the rib 45 by the second protrusion 46. By filling the gap with the adhesive, the amount of the adhesive that bonds the link member 5 and the shaft member 4 can be secured, and the adhesive strength between the link member 5 and the shaft member 4 is increased. .

As described above, according to the present embodiment, the pin member 3 fitted to the frame 2 and the shaft member 4 that pivotally supports the link member 5 are lasers at the boundary L between the convex portions 32 and the concave portions 43. Since it is integrated with the welding mark 7 formed by welding, the shaft member 4 can be attached to the frame 2 without caulking. Therefore, even when the frame 2 is made of resin, deformation when the shaft member 4 is attached can be suppressed.
Moreover, since the pin member 3 and the shaft member 4 are integrated by welding, the attachment rigidity of both can also be improved.

Moreover, since the recessed part 35 surrounding the welding mark 7 is formed on the side opposite to the side where the convex part 32 is provided in the pin member 3, the penetration depth of the laser beam can be increased, and the welding mark can be increased. 7 can be formed more easily on the back side.
Moreover, since the convex part 32 of the pin member 3 fitted to the concave part 43 of the shaft member 4 extends to a position facing the link member 5, and the weld mark 7 is formed to a position facing the link member 5. The portion that supports the link member 5 is filled with the shaft member 4, the pin member 3, and the welding mark 7. Therefore, the link member 5 can be supported stably.

Further, since the step portion 34 that accommodates the frame 2 is formed in the pin member 3, the frame 2 is positioned if the frame 2 is stored in the step portion 34 and sandwiched between the shaft member 4 and the pin member 3. Is possible.
Further, since the step portion 34, the frame 2, and the welding mark 7 are present on the same vertical plane, the frame 2 is perpendicular to the weight of the shaft member 4, the link member 5, and the connecting member 6 acting on the pin member 3. Therefore, the mounting rigidity of the pin member 3 with respect to the frame 2 can be increased.

Moreover, since the connection member 6, the shaft member 4, and the pin member 3 are arrange | positioned coaxially, it becomes possible to assemble compactly compared with the case where each is arrange | positioned on a different axis | shaft.
In addition, since the outer diameter of the shaft portion 42 of the shaft member 4 is formed smaller than the outer diameter of the connecting member 6, an increase in the size of the shaft member 4 can be suppressed.
Further, since the concave portion 43 of the shaft member 4 is provided to the inner side of the end portion of the connecting member 6, it is possible to reduce the weight while maintaining the strength of the shaft member 4 to some extent.
Moreover, since the convex part 32 of the pin member 3 is provided inward rather than the edge part of the connection member 6, the support rigidity of the shaft member 4 and the pin member 3 by supporting the connection member 6 can be improved.

The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. In the following description, the same portions as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In the said embodiment, although the case where the welding trace 7 was formed circularly by the front view was illustrated and demonstrated, the welding trace 7a may be formed in zigzag along the boundary L, as shown in FIG. . Thus, when the welding trace 7a is formed in a zigzag along the boundary L, the entire length of the welding trace 7 can be lengthened, and the shaft member 4 and the pin member 3 can be integrated more firmly.

1 Frame and shaft member mounting structure 2 Frame (cushion frame)
3 Pin member 4 Shaft member 5 Link member 6 Connecting member 7 Weld mark 21 Through hole 31 Pin head 32 Protruding portion 33 Fitting portion 34 Stepped portion 35 Recessed portion 41 Fitting portion 42 Shaft portion 43 Recessed portion 44 First protrusion 45 Rib 46 Second protrusion 61 Notch 100 Seat structure 102 Slide rail 103 Bottom seat 104 Backrest 105 Reclining mechanism L Boundary

Claims (11)

A resin frame having a through hole;
A pin member that fits into the through hole of the frame;
A shaft member that is coaxially attached to the pin member;
A movable member pivotally supported by the shaft member along the frame,
The pin member is provided with a convex portion protruding along the axial direction,
In the shaft member, a recess into which the projection is inserted is recessed along the axial direction,
Mounting of a frame and a shaft member, wherein a welding mark by laser welding is formed along the periphery of the convex portion at a boundary between the convex portion of the pin member and the concave portion of the shaft member Construction. In the mounting structure of the frame and the shaft member according to claim 1,
A structure for attaching a frame and a shaft member, wherein a concave portion surrounding the welding mark is formed on a side of the pin member opposite to the side on which the convex portion is provided. In the attachment structure of the frame and shaft member according to claim 1 or 2,
The concave portion of the shaft member extends to a position passing through the movable member, and the convex portion of the pin member fitted in the concave portion extends to a position facing the movable member,
The attachment structure of the frame and the shaft member, wherein the welding mark is formed up to a position facing the movable member. In the frame and shaft member mounting structure according to any one of claims 1 to 3,
The pin member is provided with a step portion for accommodating the frame so as to sandwich the frame together with the shaft member. The frame and shaft member mounting structure according to claim 4,
The frame and shaft member mounting structure, wherein the stepped portion, the frame, and the welding trace are present on the same plane. In the mounting structure of the frame and the shaft member according to any one of claims 1 to 5,
The attachment structure of the frame and the shaft member, wherein the welding mark is formed in a zigzag manner along the boundary. It is a seat structure having resin left and right cushion frames having through holes and pipe-shaped connecting members assembled to the left and right cushion frames through the through holes,
A pin member that fits into the through hole;
A shaft member that is coaxially attached to the pin member and fits into the connecting member;
A movable member supported by the shaft member along the cushion frame,
The pin member is provided with a convex portion protruding along the axial direction,
In the shaft member, a recess into which the projection is inserted is recessed along the axial direction,
A sheet structure in which welding marks by laser welding are formed along the periphery of the convex portion at a boundary between the convex portion of the pin member and the concave portion of the shaft member. The sheet structure according to claim 7,
The seat structure, wherein the connecting member, the shaft member, and the pin member are arranged coaxially. In the sheet structure according to claim 7 or 8,
The seat structure according to claim 1, wherein an outer diameter of a shaft portion that pivotally supports the movable member in the shaft member is smaller than an outer diameter of the connecting member. In the sheet structure according to any one of claims 7 to 9,
The recessed part of the said shaft member is provided to the inner side rather than the edge part of the said connection member, The sheet | seat structure characterized by the above-mentioned. In the sheet structure according to any one of claims 7 to 10,
The convex part of the said pin member is provided in the inner side rather than the edge part of the said connection member, The sheet | seat structure characterized by the above-mentioned.

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