JP2008247161A - Dovetail structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dovetail structure for increasing an amount of absorbing seat displacement and hardly dropping out while fitting. <P>SOLUTION: A bracket 51 of a seat leg 31 is provided with a dovetail male 61 extended toward a front wall surface 52 of a swivel upper 23. A position on the front wall surface 52 opposing to the dovetail male 61 in a storing state 41 is provided with a dovetail female 62. An upper side surface 101 of the dovetail male 61 is composed of a base end side upper side surface 102 forming a holding part 91 and a tip side upper side surface 103 forming an introduction part 92. A taper value at the holding part 91 is set to be different from a taper value at the introduction part 92 in the dovetail male 61. The taper value at the holding part 91 is set to be smaller than the taper value at the introduction part 92. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dovetail structure for suppressing rattling.

  Conventionally, as a welfare vehicle, a vehicle including a seat lifting device is known.

  The seat lifting device includes a slide mechanism provided on a floor, a rotating mechanism supported by the sliding mechanism, and a lifting mechanism supported by the rotating mechanism, and a seat leg is mounted on an arm of the lifting mechanism. It is supported.

  As a result, the seat body held by the seat leg can be lowered while moving the seat body out of the passenger compartment by operating the arm of the lift mechanism while the seat body is rotated toward the entrance / exit by the rotation mechanism. It is configured.

  As shown in FIG. 6, the seat leg holding the seat body is provided with a conical dovetail mail 801. The front wall 803 of the swivel upper 802 of the rotating mechanism is provided with the dovetail mail 801. A dovetail female 804 to be inserted is established.

  Thereby, when operating the arm of the lifting mechanism to retract the seat body, the dovetail mail 801 provided on the seat leg is fitted into the dovetail female 804 provided on the swivel upper 802, and It is configured so that rattling of the seat body with respect to the swivel upper 802 can be suppressed.

  However, in such a dovetail structure, the taper of the dovetail mail 801 must be increased in order to increase the amount of absorption when absorbing the misalignment of the stored seat body. When the external force 811 in the vertical direction is applied to the seat body with the dovetail mail 801 fitted inside the dovetail mail 804, the component force acting on the dovetail mail 801 is applied to the dovetail mail 804. It will act in the direction of exiting.

  As a result, there is a concern that the dovetail mail 801 may be inadvertently omitted from the dovetail mail 804.

  In order to prevent this, it is conceivable to reduce the taper of the dovetail mail 801. In this case, the total length of the dovetail mail 801 must be increased in order to increase the amount of sheet misalignment absorption. A malfunction will occur.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a dovetail structure that increases the amount of absorption of sheet misalignment and is difficult to come off when fitted.

  In order to solve the above problems, in the dovetail structure according to claim 1 of the present invention, in the vehicle lifting device that rotates, slides, and lifts the seat body, the seat body moved to a distant position is returned to the device body. In this case, a dovetail structure that suppresses rattling of the seat body with respect to the apparatus body by internally fitting a dovetail mail formed in a taper shape into the dovetail female, wherein the taper of the dovetail mail is arranged on the tip side. The introduction portion and the holding portion constituting the base end side are set to different values, and the taper at the introduction portion is set to a value larger than the taper at the holding portion.

  That is, the taper of the dovetail mail is set to a different value between the introduction part constituting the distal end side and the holding part constituting the proximal end side, and the taper at the introduction part is the taper at the holding part. It is set to a larger value.

  For this reason, since the taper is set to a large value in the introduction part on the tip side, it is easy to fit into the dovetail female, and even when a large deviation occurs between the dovetail female, This deviation is absorbed.

  On the other hand, the taper is set to a small value in the holding portion on the base end side. For this reason, when an external force in the vertical direction is applied to the seat body, the component force acting on the dovetail mail is reduced in the direction of coming out of the dovetail female.

  In the dovetail structure according to a second aspect of the present invention, the taper continuously changes from the introduction portion to the holding portion.

  Thereby, the change of the reaction force received when inserting the dovetail mail into the dovetail female becomes gentle.

  Further, in the dovetail structure according to claim 3, the taper center at the introduction portion is made to substantially coincide with the operation locus of the dovetail mail, while the taper center at the holding portion is made substantially perpendicular to the input direction of the external force. Set.

  This makes it easier to fit the introduction portion into the dovetail female, and even if a large deviation occurs with the dovetail female, this deviation is absorbed.

  On the other hand, when an external force is applied to the seat main body, the component force acting on the dovetail mail can be made substantially “0” in the direction of coming out of the dovetail mail.

  As described above, in the dovetail structure according to the first aspect of the present invention, by increasing the taper value of the introduction portion on the distal end side, it is easy to fit into the dovetail female, and the dovetail male and the dovetail female are arranged. Even if a large gap occurs with the mail, this gap can be absorbed.

  On the other hand, by reducing the taper value at the holding portion on the base end side, the component force in the pulling direction of the dovetail mail from the dovetail mail due to the vertical external force applied from the seat body is suppressed. Can do. Thereby, inadvertent omission of the dovetail mail from the dovetail mail can be prevented.

  Therefore, as compared with the conventional case where the taper of the dovetail mail is set to the same value from the proximal end side to the distal end side, the amount of sheet misalignment is increased without increasing the overall length, and at the time of fitting, It is possible to prevent the positional deviation of the sheet due to the preparation missing.

  Further, in the dovetail structure according to the second aspect, a smooth insertion operation can be performed by moderating a change in reaction force received when the dovetail mail is inserted into the dovetail female.

  Furthermore, in the dovetail structure according to claim 3, the insertion of the introduction portion into the dovetail female can be further facilitated, and even when a large deviation occurs between the dovetail female and the dovetail female, Misalignment can be absorbed.

  On the other hand, when an external force is applied to the seat main body, the component force acting on the dovetail mail in the direction of coming out of the dovetail mail can be made substantially “0”. As a result, it is possible to enhance the effect of preventing inadvertent removal.

  (First embodiment)

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a rotary lift sheet 1 in which the dovetail structure according to the present embodiment is adopted, and the rotary lift sheet 1 is provided in a welfare vehicle.

  The rotary elevating seat 1 includes a seat main body 11 constituting a seat, and an elevating device 12 that supports the seat main body 11, and the elevating device 12 includes a slide mechanism 14 fixed to a vehicle body floor 13. The rotating mechanism 15 supported by the slide mechanism 14 and the elevating mechanism 16 supported by the rotating mechanism 15 are provided.

  Accordingly, the seat body can be rotated and slid and moved up and down.

  The rotation mechanism 15 includes a swivel lower 21 that is slidably supported on the vehicle body floor 13 via the slide mechanism 14, and a swivel upper 23 that is rotatably supported by the swivel lower 21 via a rotation bearing 22. The swivel upper 23 is provided with the lifting mechanism 16.

  The lifting mechanism 16 includes a pair of arms (not shown), and a seat leg 31 is supported by both arms. The seat body 11 is fixed to the seat leg 31, and a parallel link is formed by the arms and the seat leg 31.

  As a result, the seat body 11 in the forward-facing state facing the front of the vehicle by the rotating mechanism 15 is rotated to a lateral state toward the entrance / exit side of the vehicle side portion, and the arm of the elevating mechanism 16 is moved in this state. By rotating and displacing the seat body 11 in the retracted state 41 disposed on the rotating mechanism 15 so as to draw an arc shape, the seat body 11 extends outside the passenger compartment through the entrance and exit and descends. It is comprised so that it can transfer to an extended state. Further, in this extended state, by rotating the arm of the elevating mechanism 16, the seat body 11 arranged outside the passenger compartment is moved into the passenger compartment through the entrance and exit, and the rotating mechanism 15 is also moved. The storage state 41 can be formed by being arranged on the swivel upper 23.

  The seat leg 31 is provided with a bracket 51 extending downward, and the bracket 51 comes close to the front wall surface 52 of the swivel upper 23 when shifting from the extended state to the retracted state 41. In the position.

  The bracket 51 is provided with a dovetail mail 61 that extends toward the front wall surface 52 of the swivel upper 23, and a portion of the front wall surface 52 that faces the dovetail mail 61 in the retracted state 41 is provided on the bracket 51. A dovetail mail 62 that is paired with the dovetail mail 61 is provided.

  At this time, as shown in FIG. 2, the seat leg 31 is displaced by the rotation of the both arms, so that when the dovetail mail 61 is moved from the extended state to the retracted state 41, the dovetail mail 61 is The dovetail female 62 is configured to be inserted into the dovetail female 62 while moving obliquely from the upper side to the lower side. A movement line 65 indicating the movement locus is oblique to the dovetail female 62. It is comprised so that it may extend.

  The dovetail female 62 includes an opening 71 formed in the front wall surface 52 and a flange 72 formed by bending an opening edge of the opening 71 inward. In the state where the dovetail mail 61 is inserted and fitted inside, the peripheral surface of the base end of the dovetail mail 61 is configured to contact the flange portion 72.

  Thus, when the seat body 11 moved outside the passenger compartment is returned to the lifting device 12, the seat body 11 is attached to the lifting device 12 by fitting the dovetail mail 61 into the dovetail female 62. And can be positioned without rattling.

  As shown in FIGS. 3 and 4, the dovetail mail 61 is formed in a tapered shape that tapers toward the distal end, and its base end surface 81 is formed in a vertically long elliptical shape. A screw hole 82 for fixing the bracket 51 to the bracket 51 with a bolt is provided in the central portion of the base end surface 81. Positioning convex portions 83 and 83 protrude from the upper and lower portions of the screw hole 82, respectively. It is installed.

  The dovetail mail 61 includes a holding portion 91 that constitutes the proximal end side and an introduction portion 92 that constitutes the distal end side, and a lower side surface 93 of the dovetail mail 61 extends from the holding portion 91 to the introduction portion 92. Are formed in a circular cross-sectional shape that is continuous and has a width that decreases toward the tip.

  The upper side surface 101 of the dovetail mail 61 includes a proximal side upper side surface 102 that forms the holding portion 91 and a distal side upper side surface 103 that forms the introduction portion 92. As shown in FIG. 3 and FIG. 4B, the base end side upper side surface 102 is formed in a cross-sectional arc shape whose width dimension does not change from the base end to the tip end. 103 is formed in the cross-section circular arc shape where a width dimension becomes narrow as it goes to a front-end | tip from a base end.

  As shown in FIG. 3 and FIG. 4A, the dovetail mail 61 includes a taper value in the introduction portion 92 constituting the distal end side, and a taper value in the holding portion 91 constituting the proximal end side. Are set to different values, and the taper value at the introduction portion 92 is set to be larger than the taper value at the holding portion 91.

  As a result, the base end side inclination angle 112 formed by the center line 111 of the dovetail mail 61 and the base end side upper side surface 102 of the holding portion 91 is the center side 111 and the front end side upper side surface of the introduction portion 92. 103 is set to a larger angle than the tip side inclination angle 113 formed with the upper end of the holding portion 91 in a state in which the dovetail mail 61 is fitted in the dovetail female 62 as shown in FIG. The bending angle of the flange portion 72 is set so that the end-side upper side surface 102 and the lower side surface 93 are in contact with the flange portion 72 constituting the dovetail female 62.

  Further, the tip side upper side surface 103 is formed so that the tip side taper center 92a in the introduction part 92 substantially coincides with the movement line 65 indicating the operation locus of the dovetail mail 61, and the holding part The proximal taper center 91a at 91 is substantially perpendicular to the input direction of the external force F applied from the seat body 11 with the dovetail mail 61 fitted inside the dovetail female 62. The base end side upper side surface 102 is formed.

  Further, the left side surface 121 and the right side surface 122 of the dovetail mail 61 are formed so that the proximal end side surface 123 and the proximal end right side surface 124 that form the holding portion 91 are formed substantially in parallel to form the introduction portion 92. The distal end side surface 125 and the proximal end right side surface 126 are configured so that the distance between them becomes narrower toward the distal end side.

  Accordingly, as shown in FIG. 4, the holding portion 91 is formed so that the vertical dimension becomes narrower toward the distal end side, and the introduction portion 92 has a vertical dimension and a width dimension toward the distal end side. Is formed in a tapered shape.

  In the present embodiment according to the above configuration, the taper of the upper side surface 101 of the dovetail mail 61 provided in the seat leg 31 is the taper value at the front end side upper surface 103 in the introduction portion 92 constituting the front end side, The taper value at the base end side upper surface 102 of the holding portion 91 constituting the base end side is set to a different value, and the taper value at the introduction portion 92 is greater than the taper value at the holding portion 91. It is set to a large value.

  For this reason, the introduction portion 92 having a large taper value can be easily fitted into the dovetail female 62 by increasing the variation absorption allowance, and the central axis 111 of the dovetail male 61 and the central axis of the dovetail female 62 Even when a large deviation occurs, the deviation 92 is absorbed and the introduction portion 92 at the tip of the dovetail mail 61 can be reliably inserted into the opening 71 of the dovetail mail 62.

  Thereby, the said sheet | seat main body 11 supported by the said sheet leg 31 can be reliably guide | induced to the correct position.

  On the other hand, the taper value of the holding portion 91 at the base end of the dovetail female 62 is set to a small value. Therefore, when the seat body 11 is disposed on the rotation mechanism 15 and the dovetail mail 61 is fitted in the dovetail female 62, the seat body 11 is subjected to an external force F in the vertical direction. Even if it exists, the component force which acts on the said dovetail mail 61 in the direction which leaves | separates from the said dovetail mail 62 can be made small. As a result, the dovetail mail 61 can be prevented from being inadvertently removed from the dovetail mail 62, and the looseness of the sheet main body 11 can be reduced by reducing the removal force.

  Therefore, compared with the conventional taper value of the dovetail mail is set to the same value from the proximal end side to the distal end side, without increasing its overall length, the amount of sheet misalignment is increased, and at the time of fitting, It is possible to prevent the positional deviation of the sheet body 11 due to inadvertent removal.

  In the present embodiment, the tip-side upper side surface 103 is formed so that the tip-side taper center 92a in the introduction portion 92 substantially coincides with the movement line 65 of the dovetail mail 61, and the holding The proximal end side taper center 91a of the portion 91 is substantially perpendicular to the input direction of the external force F applied from the seat body 11 in a state where the dovetail mail 61 is fitted in the dovetail female 62. The base end side upper side surface 102 is formed.

  For this reason, the introduction part 92 can be further easily fitted into the dovetail female 62, and even if a large deviation occurs between the introduction part 92 and the dovetail female 62, the deviation is absorbed. can do.

On the other hand, when an external force F in the vertical direction is applied to the seat main body 11, the component force acting on the dovetail mail 61 in the direction of detaching from the dovetail mail 62 can be made substantially “0”. Thereby, the careless prevention effect can be further enhanced.

  (Second embodiment)

  FIG. 5 is a diagram showing a second embodiment of the present invention. The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and different parts are shown. Only the explanation will be given.

  That is, the upper side surface 101 of the dovetail mail 201 includes the proximal-side upper side surface 102 that forms the holding portion 91 and the distal-side upper side surface 103 that forms the introduction portion 92. A continuous upper side surface 202 is formed between the side upper side surface 103 and the base end side upper side surface 102.

  The continuous upper side surface 202 includes a curved surface that is curved downward from the proximal side upper side surface 102 toward the distal side upper side surface 103. The distal side upper surface 103 and the proximal side upper side are formed. The side surface 102 is configured to be continuous with a continuous surface.

  Accordingly, the taper of the dovetail mail 201 is configured to continuously change from the introduction part 92 to the holding part 91.

  Also in the above configuration, the same effect as that of the first embodiment described above can be obtained.

  In addition, since the taper of the dovetail mail 201 is configured to continuously change from the introduction part 92 to the holding part 91, the dovetail mail 201 is inserted into the dovetail mail 62. The reaction force received from the flange portion 72 can be moderately changed.

  As a result, a smooth insertion operation of the dovetail mail 201 can be performed, and a shock to the seat body 11 during storage can be reduced.

It is sectional drawing which shows 1st embodiment of this invention. It is explanatory drawing which shows operation | movement of the dovetail structure of the embodiment. It is a perspective view which shows the dovetail mail of the embodiment. It is a figure which shows the dovetail mail of the embodiment, (a) is a side view, (b) is a top view. It is a figure which shows 2nd embodiment of this invention. It is explanatory drawing which shows the conventional dovetail structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Seat main body 12 Lifting device 23 Swivel upper 31 Seat leg 61 Dovetail mail 62 Dovetail female 65 Moving line 91 Holding part 91a Base side taper center 92 Introduction part 92a Tip side taper center 101 Upper side 102 Base end side upper side 103 Tip Side upper side surface 111 Center line 112 Base end side tilt angle 113 Front end side tilt angle 201 Dovetail female 202 Continuous surface

Claims (3)

In a vehicle lifting / lowering device that rotates and slides and lifts and lowers a seat body, when returning the seat body moved to a distant position to the body, a dovetail mail formed in a taper shape is fitted into a dovetail female. A dovetail structure that suppresses rattling of the seat body with respect to the apparatus body,
The taper of the dovetail mail is set to a different value between the introduction part constituting the distal end side and the holding part constituting the proximal end side, and the taper at the introduction part is set to a larger value than the taper at the holding part. Dovetail structure characterized by   The dovetail structure according to claim 1, wherein the taper continuously changes from the introduction portion to the holding portion.   2. The taper center at the introduction portion is made to substantially coincide with the operation locus of the dovetail mail, while the taper center at the holding portion is set to be substantially perpendicular to the input direction of external force. Or the dovetail structure of 2.

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