JP5960042B2 - Sheet - Google Patents

Description

  The present invention relates to a seat provided with a seat body attached to a portion to be attached.

  2. Description of the Related Art Conventionally, for example, seats installed on vehicles such as various transport machines such as automobiles, ships, and aircraft, or work machines, are firmly fixed to a mounted portion so as not to be detached from an impact. On the other hand, since various vibrations are applied to such vehicles from the outside and inside during use, so that such vibrations are not transmitted to the seats that are firmly fixed, It is required to dampen or block vibration.

  As such a sheet, for example, an elastic body such as rubber is interposed as a cushioning material between the seat main body and a mounted portion to which the seat main body is attached, so that the elastic deformation of the cushioning material causes the machine from being inside and outside. A configuration for absorbing vibration is known (see, for example, Patent Documents 1 and 2).

  Specifically, in the configuration described in Patent Document 1, the connecting body that connects the seat main body and the attached portion is formed of an elastic body. Moreover, in the structure of patent document 2, the elastic body is arrange | positioned covering the connection body which connects a sheet | seat main body and a to-be-attached part.

Japanese Utility Model Publication No. 3-34943 (page 5-6, Fig. 1) Japanese Utility Model Publication No. 2-6634 (page 2-4, FIG. 1 and FIG. 2)

  However, in the case of the configuration described in Patent Document 1 described above, it is necessary to use an elastic body that secures load resistance so that the seat body does not come off the attached portion in the event of an accident or the like. Since the damping capacity is also limited, it is not easy to obtain sufficient vibration absorption performance, and it is not easy to attenuate and absorb a certain level of vibration. Similarly, in the case of the configuration described in Patent Document 2, it is not easy to obtain sufficient vibration absorbing performance due to the limit of the damping capacity of the elastic body itself. Such a problem occurs not only for a vehicle seat but also for any seat to which vibration is transmitted from the attached portion.

  The present invention has been made in view of such points, and a seat capable of suppressing the uncomfortable feeling at the time of sitting caused by vibration from the attached portion side while securing the fixing strength between the seat body and the attached portion. The purpose is to provide.

The seat according to claim 1 is a seat body attached to the attached portion, a housing connected to one of the seat body and the attached portion side, and a ball rotatably held in the housing. And at least one ball joint provided with a ball stud having a stud portion protruding from the ball portion and connected to the other of the seat body and the attached portion side, and the seat body and the attached portion side One of them and a housing of the ball joint are connected to each other, and a leaf spring for urging the ball joint along the axial direction of the stud portion is provided.

請 Motomeko 2 sheet in that in a sheet according to claim 1, wherein the ball joint, between the bearing seat and the ball portion and the bearing seat for receiving rotatably a ball portion of the ball stud is accommodated in a housing And a lubricant interposed therebetween.

According to a third aspect of the present invention, in the seat according to the first or second aspect , the ball joint is arranged with the axial direction of the stud portion aligned along the horizontal direction.

The seat according to claim 4 is the seat according to claim 1 or 2 , wherein the ball joint is arranged with the axial direction of the stud portion along the vertical direction.

According to the seat of claim 1, the ball joint housing is connected to one of the seat body and the attached portion side, and the stud protrudes from the ball portion of the ball stud that is rotatably held by the housing. The ball joint is connected to the other of the seat body and the attached portion side, and one of the seat body and the attached portion side and the housing of the ball joint are connected by a leaf spring, and the ball joint is connected to the stud portion. By urging along the axial direction, while securing the fixing strength between the seat body and the mounted part, vibration from the mounted part side is reliably damped and transmitted to the seat body by the ball joint and leaf spring. can be reliably shifted to uncomfortably feel difficult frequency the frequency of the vibrations, suppressed uncomfortable feeling when seated due to vibration from the mounting portion It can be.

According to the seat of the 請 Motomeko 2 wherein, in addition to the effect of sheet according to claim 1, wherein, in the housing of the ball joint, it accommodates a bearing seat for receiving the ball portion of the ball stud rotatably, the bearing seat By interposing a lubricant between the ball and the ball part, by appropriately setting the characteristics of the bearing seat and the lubricant, the frequency of vibration from the mounted part side can be reduced to a frequency that makes it difficult to feel uncomfortable. It can be shifted reliably.

According to the seat of claim 3 , in addition to the effect of the seat of claim 1 or 2 , the ball joint is disposed along the horizontal direction of the axial direction of the stud portion so that the ball joint is seat body. The impact resistance can be further improved without supporting the weight.

According to the seat of the fourth aspect , in addition to the effect of the seat of the first or second aspect , the ball joint is arranged along the vertical direction of the stud portion with respect to the attached portion. Since the ball joint and the seat body can be assembled sequentially from the upper side, the productivity can be further improved.

1A and 1B show a sheet of a related technology of the present invention, in which FIG. 1A is a partially enlarged perspective view, and FIG. 2B is a perspective view showing a part of the sheet. The ball joint of a seat same as the above is shown, (a) is the sectional view, and (b) is the perspective view. It is a perspective view which shows a sheet | seat same as the above. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a seat according to an embodiment of the present invention, in which (a) is a partially enlarged perspective view and (b) is a perspective view illustrating a part of the sheet. It is a perspective view which shows the ball joint of a seat same as the above.

Hereinafter, a configuration of one related technique of the present invention will be described with reference to FIGS.

  In FIG. 3, 11 indicates a seat, and this seat 11 is a vehicle seat (transport machine (vehicle) seat) used in a vehicle such as an automobile.

Then, the sheet 11 includes a sheet body 13, and a singular or plural, the relevant the art four ball joints 15 for attaching the sheet body 13 to the mounting portion 14 of the vehicle body. In the following, directions such as front and rear, both sides, and up and down are based on, for example, the straight traveling direction of the vehicle.

  The seat body 13 includes a seat back 21 that is a backrest portion and a seat cushion 22 that is a seating portion.

  The seat back 21 supports the back, which is the rear part of the user seated on the seat cushion 22, and the back frame 24 as a back base formed by a member such as metal or resin has cushioning properties, for example. It is configured to be covered with a back pad portion (not shown) as a back covering portion made of resin or the like. Further, a headrest is attached to the upper end portion of the seat back 21 as necessary.

  The back frame 24 is integrally provided with side back frames 27 and 27 that form both sides and an upper back frame 28 that connects the upper ends of the side back frames 27 and 27, and the side back frames 27 and 27. A pipe-shaped reclining shaft 29, which is a rotating shaft that constitutes a part of a reclining device (not shown), is provided between the lower end portions of the two, and has a rectangular frame shape. Further, a reinforcing frame 30 for reinforcement is provided at the middle part in the vertical direction of the side back frames 27, 27. Furthermore, square cylinder-shaped mounting frames 31 and 31 for mounting the headrest are integrally mounted on the upper back frame 28 along the vertical direction. The seat back 21 (back frame 24) is attached to the seat cushion 22 via a reclining shaft 29 so as to be rotatable in the front-rear direction.

  The seat cushion 22 is not shown as a cushion covering portion made of, for example, a resin having a cushioning property. The cushion frame 33 is a cushion base as a seat-side mounting portion formed of a member such as metal or resin. It is configured to be covered with a cushion pad portion.

  The cushion frame 33 includes side cushion frames 36 and 36 serving as seat-side attachment portions on both sides, a front cushion frame 37 connecting the front end portions of the side cushion frames 36 and 36, and the side cushions. A rear cushion frame 38 that connects the rear ends of the frames 36 and 36 is provided, and has a quadrangular frame shape.

  The attached portion 14 includes, for example, a leg frame 41 that is fixed to a vehicle floor (not shown), for example, a leg portion 41 as four connecting and fixing portions, and a slide device 42 provided on the leg portion 41. It is. The slide device 42 includes a lower rail portion 44 that is a first rail portion provided between the leg portions 41 and 41 positioned in the front and rear directions, and a horizontal direction between the lower rail portions 44 and 44. And a pair of front and rear second rail portions, upper and lower rail portions 45 and 45, along the lower rail portions 44 and 44, with the upper rail portions 45 and 45 being parallel to each other in the front-rear direction. It is possible to slide. And the upper rail parts 45 and 45 are connected with the side cushion frames 36 and 36 of the cushion frame 33 via the ball joints 15 and 15, respectively.

  Each ball joint 15 includes a ball stud 51 made of metal, which is a ball side member as a movable member, a metal housing 52, which is a ball receiving side member, as a fixed member, and the housing 52 and the ball stud. And a ball seat 53 which is a bearing seat made of a synthetic resin or the like interposed between the side cushion frame 51 and the side cushion frame at each intersection of the side cushion frames 36 and 36 and the upper rail portions 45 and 45. 36 and 36, and the upper rail portions 45 and 45, respectively. Note that a dust cover may be attached to the ball joint 15 across the ball stud 51 and the housing 52 as necessary.

  The ball stud 51 is integrally formed of a rigid member such as iron or aluminum, for example, and has a ball portion 55 that is a substantially spherical head, and a long circular shape such as a metal that protrudes from the ball portion 55. And a stud portion 56 which is a shaft portion.

  The ball portion 55 is attached to the housing 52 while being slidably (rotatably) held inside the ball seat 53.

  The stud portion 56 protrudes from the ball portion 55 at a position where the axial center passes through the center position of the ball portion 55, for example. Further, on the outer periphery of the stud portion 56, a flange portion 56a that is a mounting seat portion protrudes at a position near the base end side that is separated from the ball portion 55. The stud portion 56 is coupled to an attachment bracket 58 that is attached and fixed to the upper rail portion 45 of the attached portion 14.

  Here, the mounting bracket 58 includes a plate-like mounting bracket main body 58a attached to the upper surface of the upper rail portion 45, and a plate-like stud portion mounting portion extending in the front-rear direction projecting substantially vertically on the upper portion of the mounting bracket main body 58a. 58b is integrated. In the mounting bracket 58, the mounting bracket main body 58a is integrally fixed to the upper rail portion 45 by a mounting member 59 such as a bolt. In addition, the stud portion 56b is inserted into the stud portion mounting portion 58b horizontally from the outer side to the inner side in both sides, that is, along the direction substantially perpendicular to the stud portion mounting portion 58b. 56 is integrally attached and fixed via a nut or the like (not shown) in a state where the flange portion 56a is in contact with the stud portion attaching portion 58b. Accordingly, each ball joint 15 is arranged with the axial direction of the stud portion 56 (ball stud 51) and the housing 52 along the horizontal direction, that is, in a horizontally placed state.

  The housing 52 is also called a socket, and is formed in a cylindrical shape by a rigid member such as iron or aluminum. The housing 52 includes an inner chamber 61 that is a ball receiving portion that holds the ball portion 55 via the ball seat 53, and openings (one and the other) that communicate with the inner chamber 61 (one and the other). . Furthermore, a bracket 64 as an attachment member is integrally provided on the outer periphery of the housing 52, and the bracket 64 is attached to the side cushion frame 36.

  The opening 62 is positioned coaxially with the housing 52. Further, the stud portion 56 of the ball stud 51 is inserted into the opening 62, and a part of the ball portion 55 and the stud portion 56 are exposed to the outside of the housing 52. The peripheral edge portion of the opening 62 is curved toward the center side by caulking deformation or the like to form a holding portion 66 for holding the ball seat 53 in the inner chamber 61.

  The opening 63 is located coaxially with the housing 52. Further, the opening 63 is covered and closed by a circular plate-like plug 68 that is a closing member. The plug 68 is formed in a circular plate shape, and its outer peripheral edge is attached to an attachment step 70 formed outside the opening 63, and the outer edge of the attachment step 70 is inward. It is fixed to the housing 52 by being held by a caulking deforming portion 71 that is a caulking deformed holding portion.

  The bracket 64 includes an annular fitting portion 64a that is fitted around the housing 52, and a rectangular plate-like frame mounting portion that projects linearly along the radial direction of the housing 52 from the fitting portion 64a. Integrated with 64b. The frame attachment portion 64b is integrally attached and fixed to a base portion 72 made of metal, for example, welded to the inside of the side cushion frame 36 by a fixing member (not shown) such as a bolt.

  Further, the ball sheet 53 is integrally formed in a substantially cylindrical shape by using, for example, a synthetic resin. That is, the ball sheet 53 has substantially circular (one and the other) end surface openings 73 and 74 at both ends in the axial direction, the opening diameter of which is smaller than the outer diameter of the ball portion 55. Inside the ball sheet 53, a slidable contact surface 75, which is a holding surface communicating with the end surface openings 73 and 74, is formed, and the slidable contact surface 75 slides on the outer peripheral surface of the ball portion 55 (rotation). It is held possible. Therefore, the ball seat 53 is accommodated in the inner chamber 61 of the housing 52 together with the ball portion 55 of the ball stud 51, and the ball portion 55 is rotatably held in the inner chamber 61 via the ball seat 53. Has been. Further, a lubricant (grease) 76 is interposed between the sliding contact surface 75 of the ball sheet 53 and the outer peripheral surface of the ball portion 55.

  Further, the sliding contact surface 75 of the ball seat 53 holds the outer peripheral surface of the ball portion 55 including at least the equator position of the ball portion 55. Here, the equator position of the ball portion 55 refers to a position where the diameter dimension of the ball portion 55 is maximized in a direction orthogonal to the axial direction of the stud portion 56. The ball seat 53 may be, for example, a so-called two-piece type that is divided into a seat main body portion that holds the ball portion 55 and a cushion portion that elastically supports the ball portion 55.

Next, the operation of the one related technique will be described.

  A user seated on the seat 11 operates the reclining device and the slide device 42 to appropriately adjust the angle of the seat back 21 with respect to the seat cushion 22 and the front-rear position of the seat body 13.

  The vibration generated by the traveling of the vehicle is integrally input from the vehicle body side to the attached portion 14 via the leg portion 41, and the mounting bracket 58 attached to the upper rail portions 45, 45 of the attached portion 14 is provided. It vibrates together.

  At this time, vibration is transmitted to the ball stud 51 via the stud portion 56 of the ball stud 51 of the ball joint 15 that is connected and fixed to the stud portion mounting portion 58b of the mounting bracket 58, and the ball portion 55 of the ball stud 51 However, by rotating while sliding the sliding contact surface 75 of the ball seat 53 through the lubricant 76, the ball is caused by the frictional resistance (sliding resistance) between the ball portion 55 and the housing 52 (ball seat 53). The rotation of the stud 51 is attenuated with respect to the housing 52 of the ball joint 15 and transmitted or blocked. Accordingly, the vibration from the vehicle body side (attached portion 14 side) is attenuated and transmitted to or blocked from the cushion frame 33, that is, the seat body 13 in which the housing 52 is fixed via the bracket 64 by each ball joint 15. .

As described above, according to the one related technique , by connecting the seat body 13 and the attached portion 14 using the ball joint 15, vibration from the vehicle body side causes the housing 52, As the vibration is transmitted to the ball seat 53, the lubricant 76, and the ball stud 51, an effect of changing the vibration region, that is, the vibration frequency, is obtained. Therefore, the housing 52, the ball seat 53, the lubricant 76, and the ball stud 51 are obtained. By appropriately setting the material and the rigidity (caulking strength, etc.) of the ball joint 15, it is possible to arbitrarily shift from a frequency at which the user sitting on the seat 11 feels uncomfortable to a frequency at which the user feels uncomfortable (does not feel uncomfortable). In addition, the seat body 13 can be prevented from unnecessarily shaking when seated on the seat 11.

  As a result, not only the vibration from the mounted portion 14 side is damped, but also the frequency of the vibration transmitted to the seat body 13 can be shifted to a frequency at which the seated user does not feel uncomfortable. Comfortable seating that can suppress the uncomfortable feeling when sitting due to vibration from the seat and that the seat body 13 does not unnecessarily shake due to the weight of the seated person without vibration from the mounted part 14 side Comfort (riding comfort) can be obtained.

  Moreover, since the ball stud 51 and the housing 52 can each be made of metal, the load resistance (impact characteristics) can be improved as compared with the case where the seat body 13 is simply connected to the mounted portion 14 by an elastic body. The fixing strength between the seat main body 13 and the attached portion 14 can be secured.

  In addition, a ball seat 53 that rotatably receives the ball portion 55 of the ball stud 51 is accommodated in the housing 52 of the ball joint 15, and a lubricant 76 is interposed between the ball seat 53 and the ball portion 55. Thus, by appropriately setting the characteristics of the ball seat 53 and the lubricant 76, the frequency of vibration from the attached portion 14 side can be more reliably shifted to a frequency at which it is difficult to feel uncomfortable.

  Furthermore, by arranging each ball joint 15 along the horizontal direction of the axial direction of the stud portion 56 of the ball stud 51, each ball joint 15 (ball stud 51) does not support the weight of the seat body 13, The load on each ball joint 15 when an impact is applied to the seat body 13 can be further suppressed, and the impact resistance can be further improved.

  The ball joint 15 is disposed at each of the four corners of the cushion frame 33 of the seat body 13, so that the seat body 13 can be securely attached to the attached portion 14 by the ball joint 15 in a balanced manner.

In the one related technique , instead of the bracket 64, for example, a leaf spring may be used to elastically fix the housing 52 of each ball joint 15 to the side cushion frame.

  Further, each ball joint 15 may be attached and fixed to the side cushion frame 36 with the stud portion 56 of the ball stud 51 and fixed to the upper rail portion.

Next, an embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said one related technique , the same code | symbol is attached | subjected and the description is abbreviate | omitted.

Form of this one embodiment, the housing 52 of the ball joint 15 of the one related art, with which is formed in a bottomed cylindrical shape, the bottom 81 of the housing 52, cylindrical in this housing 52 coaxially A connecting portion 82 is projected.

  The connecting portion 82 is inserted, fixed, and connected to the side cushion frame 36 from the lower side to the upper side along the vertical direction. In other words, each ball joint 15 is arranged with the bottom 81 of the housing 52 relatively upward.

  Further, the stud portion 56 of the ball stud of each ball joint 15 is located above the upper rail portion 45 from the upper side with respect to one end side of the leaf spring 84 formed in a longitudinal rectangular plate shape along the left-right direction. The other end side of the leaf spring 84 is connected by a fixing member (not shown) such as a bolt, which is inserted along the vertical direction to the lower side and integrally attached and fixed via a nut (not shown). The upper rail part 45 is integrally attached and fixed to, for example, a base part 85 made of metal or the like which is welded. Therefore, the ball joint 15 is elastically supported in the vertical direction with respect to the attached portion 14 (upper rail portion 45) via the leaf spring 84. In other words, each ball joint 15 is arranged in the vertical direction, that is, vertically, with the axial direction of the ball stud 51 (stud portion 56) and the housing 52 in the vertical direction.

  Then, either one of the seat body 13 and the attached portion 14 side and the housing 52 of the ball joint 15 are connected by a leaf spring 84, and the ball joint 15 is urged along the axial direction of the stud portion 56. By appropriately setting the material of the housing 52, the ball seat 53, the lubricant 76 and the ball stud 51 of the ball joint 15, the rigidity of the ball joint 15 (caulking strength, etc.), the elasticity of the leaf spring 84, etc. By the ball joint 15 and the leaf spring 84, the vibration from the mounted portion 14 side is more reliably damped and the frequency of the vibration transmitted to the seat body 13 is more reliably shifted to a frequency at which it is difficult to feel uncomfortable. Can do.

  In addition, since the ball joint 15 is supported from below by the leaf spring 84, the weight of the seated person of the seat 11 can be basically received only by the leaf spring 84, and the weight of the seated person is added to the ball joint 15. Therefore, the ball joint 15 does not rotate unnecessarily due to this weight, and the seat body 13 does not unnecessarily shake due to the weight of the seated person without vibration from the attached portion 14 side. .

  Further, by arranging the ball joint 15 with the axial direction of the stud portion 56 of the ball stud 51 along the vertical direction, the ball joint 15 is assembled to the mounted portion 14 from above, and then the seat body 13 is mounted. Furthermore, it can be assembled on the top. That is, since the ball joint 15 and the seat body 13 can be sequentially assembled with respect to the attached portion 14 from the upper side, the manufacturability (assembly performance) can be further improved.

Incidentally, in the embodiment described above, the ball joint 15, the stud portion 56 of the ball stud 51 attached and fixed to the side cushion frame 36 via a plate spring 84 connecting portion 82 to the upper rail portion of the housing 52 It may be fixed.

Et al is, in the embodiment described above, the ball joint 15 may all be set to the same characteristics, the characteristics of at least one of the ball joint 15, by varying the remaining other ball joint 15 Also good.

  The seat 11 can be used not only as a vehicle seat but also as an arbitrary seat disposed at a position where vibrations are transmitted, such as a seat for a vehicle such as an airplane, a ship, or a work machine.

  The present invention can be suitably used as a sheet for a transport machine such as an automobile.

11 seats
13 Seat body
14 Leg frame as mounting part
15 Ball joint
51 Ball stud
52 Housing
53 Ball seat as bearing seat
55 Ball
56 Stud section
76 Lubricant
84 Leaf spring

Claims (4)

A seat body attached to the attached portion;
A housing connected to one of the seat body and the attached portion side, a ball portion rotatably supported by the housing, and a protrusion projecting from the ball portion between the seat body and the attached portion side At least one ball joint comprising a ball stud having a stud portion connected to the other ;
A leaf spring for connecting either one of the seat body and the attached portion side and the housing of the ball joint to bias the ball joint along the axial direction of the stud portion ; Characteristic sheet . The ball joint
A bearing seat received in the housing and rotatably receiving the ball portion of the ball stud;
Sheet according to claim 1, characterized in that it comprises a lubricant is interposed between the bearing seat and the ball portion. 3. The seat according to claim 1, wherein the ball joint is disposed so that an axial direction of the stud portion is along a horizontal direction. The ball joint according to claim 1 or 2 , wherein the ball joint is arranged with the axial direction of the stud portion along the vertical direction.

Images