JP4817175B2 - Member connection structure - Google Patents

Description

  The present invention relates to a member connection structure in which a moderation mechanism is interposed between two members that can move relative to each other to moderately stop the relative position between the two members at any one of a plurality of moderation stop positions.

Conventionally, between two members that can move relative to each other, a moderation element provided on one member side and the other member side to stop the relative position between the two members at any one of a plurality of moderation stop positions. And a moderation mechanism that selectively holds the moderator in any one of the moderator holding units. As such a moderation mechanism, for example, a mode is conceivable in which a moderation element provided on one member side is selectively held by any one of the moderation element holding portions provided on the other member side. (For example, see Patent Document 1.)
JP 2005-177054 A

  Incidentally, in the configuration described in Patent Document 1, a moving end defining mechanism (rotation restricting mechanism in Patent Document 1) that defines the end of relative movement between the two members is provided separately from the moderation mechanism. In order to provide the moderation mechanism and the moving end defining mechanism simultaneously with a small number of parts, the one member is provided with a protrusion as a moderation element, and the other member is provided with a long hole through which the protrusion as the moderation element passes, The structure which provides the said movement end prescription | regulation mechanism using these protrusions and a long hole is considered.

  On the other hand, when such a moderation mechanism is provided, there is a desire to reduce the interval between the moderation stop positions so as to obtain a more preferable usage mode. As an example of an embodiment for realizing such a demand, in the configuration described in the preceding stage, a plurality of holding recesses as the moderator holding portion are provided on the other member side, and the diameter of the holding recess and the interval between the holding recesses are provided. It is conceivable to reduce the distance.

  However, when the configuration described in the previous stage is adopted, it is necessary to reduce the projections to be held in the holding recesses as the diameter of the holding recesses is reduced. On the other hand, in the configuration described in Patent Document 1, since the load of the member acts on the protrusion through the elongated hole, there is a problem in that the protrusion is easily damaged when the protrusion is reduced as described above. .

  In other words, the member mounting structure according to the present invention includes two members that can move relative to each other, a moving end defining mechanism that defines the end of relative movement between the two members, and these two members. A moderation mechanism capable of locking a relative position between members at any one of a plurality of moderation stop positions, and a pin having a large-diameter portion and a small-diameter portion provided on one member, The moving end defining mechanism is formed by bringing the large-diameter portion of the pin into contact with the end of the concave portion provided in the other member, and the moderation mechanism includes a plurality of the small-diameter portion of the pin provided in the other member. It is characterized by being selectively engaged with any one of the moderator holding parts.

  By adopting such a structure, the small diameter portion of the pin is secured as a component of the moving end defining mechanism that makes the large diameter portion of the pin contact the terminal end of the recess provided in the other member, while ensuring torsional rigidity. The distance between moderation stop positions can be shortened, that is, finer position adjustment can be achieved, and the large-diameter portion and small-diameter portion of one pin can be used as components for the moving end defining mechanism and the moderation mechanism, respectively. The number of points can be reduced.

  As an example of a specific configuration for realizing such a configuration, the pin is a protrusion provided to protrude from the one member, and the base end portion of the protrusion is the large diameter portion, and What makes the front-end | tip part of the said protrusion the said small diameter part is mentioned.

  As an example of an aspect that can realize the above-described effects more easily and inexpensively, the moderation element holding portion is provided in a moderation element holding member connected to the other of the two members via an urging means, and the urging means Are energized in the direction in which the moderator holding member is brought into close contact with the moderator, and the moderator holding member can be retracted as the other of the two members moves. This is because the moderation mechanism having a configuration that has been widely used in the past, using the protrusion and the movable member, can be employed almost as it is.

  As an example of a configuration in which two members are movable with respect to each other, one in which one member is pivotally attached to the other member can be cited.

  Further, as a specific example in which such a member connection structure can be suitably used, the two members that can move relative to each other include an elbow rest provided on a chair and an elbow pad that supports the elbow rest from below. The thing which is.

  According to the connection structure of members according to the present invention, a pin having a large diameter portion and a small diameter portion is provided on one member, and the moving end is brought into contact with a terminal end of a recess provided on the other member. While securing the torsional rigidity as a component of the regulation mechanism, the distance between the moderation stop positions can be shortened, that is, a finer position adjustment can be achieved by using the small diameter portion of the pin as a component of the moderation mechanism. The number of parts can be reduced by using the diameter part and the small diameter part as components of the moving end defining mechanism and the moderation mechanism, respectively.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The chair 1 using the member connection structure according to the present embodiment is shown in FIG. 1 as a whole perspective view from the front, in FIG. 2 as a whole perspective view from the rear, in FIG. 3 as a side view, and as shown in FIG. As described above, the chair body 2, the armrest 3 connected to the chair body 2, and the armrest 4 that is supported by the armrest 3 from below and is rotatable within the upper surface of the armrest 3 are provided. To do.

  The chair body 2 includes a leg 24, a base 22 supported by the leg 24, a seat 23 disposed on the base 22, and a backrest pivotally attached to the base 22 via a horizontal support shaft (not shown). 21. Further, a synchro-rocking operation in which the seat 23 and the backrest 21 are tilted in conjunction with each other is possible. Further, the backrest 21 is obtained by stretching a tension member 212 constituting a backrest surface on the front surface of the back frame 211. Here, the back frame 211 is connected to the base body 22 so as to be rotatable around the horizontal support shaft 25, and is connected to the upper end of the lower frame portion 211a via a hinge (not shown). An upper frame portion 211b, and a reaction force frame portion 211c that connects the lower frame portion 211a and the upper frame portion 211b and supplies a reaction force when an angle between them is changed.

  As shown in FIGS. 1 to 4, the armrests 3 are provided in a pair of left and right sides extending outward from the lower frame portion 211 a. Moreover, as shown in FIG. 5 which is a longitudinal cross-sectional view of the armrest 3 and an exploded perspective view illustrating an attachment mode of the armrest 3, the left and right armrests 3 are attached to the lower frame portion 211a. A fixed support 31 that is connected, a movable support 32 that can be moved back and forth with respect to the fixed support 31, and a slide stop mechanism that defines a relative position between the fixed support 31 and the movable support 32. 33 respectively. The slide stop mechanism 33 has a plurality of recesses 31x provided at a fixed pitch on the fixed support column 31 and is pivotally attached to the movable support column 32 via a shaft 33a2 and can be engaged with the recess 31x at the tip. Arm 33a having a claw portion 33a1, an operation portion 33b for receiving an operation force for releasing the engagement between the recess portion 31x and the claw portion 33a1, and a direction in which the recess portion 31x and the claw portion 33a1 are engaged. An arm urging spring 33c that urges the arm 33a and an operation portion urging spring 33d that urges the operation portion 33b toward the side away from the arm 33a are provided. Furthermore, a transparent plate 311 is provided on one surface of the fixed support column 31 so that the engaging portions of the recess 31x and the claw portion 33a1 can be visually recognized from the outside. The upper end surface 3a of the armrest 3 is an elbow rest receiving surface on which the armrest 4 can be placed upward, and protrusions 34 are provided on the front and rear of the upper end surface 3a of the armrest 3. Yes. The protrusion 34 includes a large diameter portion 341 on the proximal end side and a small diameter portion 342 on the distal end side. In this embodiment, the concave portions 31x are provided in the front portion and the rear portion of the fixed column portion 31 so that the left and right fixed column portions 31 have the same shape, and the fixed column portion 31 is formed symmetrically in the longitudinal direction. .

  As shown in FIGS. 1 to 6, the elbow rest 4 is an exploded perspective view showing how the elbow rest 4 is attached to the armrest 3. As shown in FIG. 7, the elbow of the armrest 3 An elbow rest main body 41 placed above the rest receiving portion and an elbow rest cover 42 covering the upper surface of the elbow rest main body 41 are provided. Here, FIG. 8 shows a plan view of the elbow rest 4 attached to the armrest 3, and FIG. 9 shows an xx cross-sectional view in FIG. In FIG. 8, the elbow rest cover 42 is indicated by an imaginary line.

  The elbow rest main body 41 includes a bottom wall 411, an outer frame 412 that stands up from the outer periphery of the bottom wall 411, a rib 413 that stands up from the bottom wall 411, and a screw insertion hole provided in the bottom wall. 4x and the long hole 4y which can let the said protrusion pass, and are opened upwards.

  Therefore, in this embodiment, between the armrest 3 and the armrest 4, a pivot shaft member 5 that pivotally attaches the armrest 4 to the armrest 3, the armrest 3, and the armrest A movement end defining mechanism 6 for defining the end of relative movement between the arm 4 and the moderation mechanism 7 capable of locking the relative position of the armrest 3 and the elbow pad 4 to any one of a plurality of moderation stop positions; As described above, the elbow 3 as one member has a projection 34 as a pin having a large diameter portion 341 and a small diameter portion 342 protruding from the upper end surface 3a of the elbow 3. Provided. In addition, the moving end defining mechanism 6 functions by causing the large-diameter portion 341 of the projection 34 to abut on the terminal end 4y1 of the long hole 4y that is a recess provided in the elbow rest 4 that is the other member. The moderation mechanism 7 is made to function by selectively engaging the small diameter portion 342 of the projection 34 with one of the plurality of moderation element holding recesses 4h provided on the elbow rest 4.

  Specifically, in the present embodiment, the pivot shaft member 5 includes a male screw portion 51 that can be screwed into a female screw hole 3x provided in the elbow hook 3, and a screw insertion provided in the elbow rest main body 41. A screw head 52 that abuts the opening edge of the hole 4x, and a shaft 53 that is provided between the male screw 51 and the screw head 52 and faces the screw insertion hole 4x.

  As described above, the moving end defining mechanism 6 includes the large-diameter portion 341 of the protrusion 34 and the long hole 4y provided in the elbow pad 4. Then, the elbow rest 4 is prohibited from further movement by bringing the large diameter portion 341 of the protrusion 34 into contact with the longitudinal end of the long hole 4y.

  The moderation mechanism 7 is engaged with the moderation element provided on the side of the elbow 3, specifically, the small diameter part 342 of the projection 34 and the elbow rest 4, as described above. Each has a holding recess 4h which is a plurality of possible moderator holding portions. The holding recess 4h is provided in a movable member 71 as a moderator holding member connected to the elbow rest main body 41 through a spring 7s as biasing means. The movable member 71 is provided with the holding recesses 4h at five locations. On the other hand, the spring 7s biases the movable member 71 toward the side where the holding recess 4h of the movable member 71 is in close contact with the protrusion 34. The elbow rest main body 41 is provided with a guide portion 4g using the rib 413. The guide 4g guides the movable member 71 and the holding recess 4h provided on the movable member 71 so as to be movable only in the direction of contact with and away from the rotation center, that is, the pivot shaft member 5. And this moderation mechanism 7 is provided in the rear part of the elbow rest 4, respectively, and this elbow rest 4 can be hold | maintained in either the 1st-5th moderation stop position. In addition, the thickness dimension of the part provided with the holding recess 4h of the movable member 71 is smaller than the thickness dimension of other parts, and the protrusion is provided between the holding recess 4h and the elbow rest body 41. It is possible to form a space 4s in which the 34 large-diameter portions 341 can be accommodated. Further, when an operating force is applied to the armrest 4 to rotate along the upper end surface 3 a of the armrest 3, the movable member 71 is retracted so that the armrest 4 can be rotated with respect to the armrest 3. I have to.

  In the present embodiment, as described above, the projection 3 having the large-diameter portion 341 and the small-diameter portion 342 is provided on the armrest 3, and the moving end defining mechanism 6 causes the large-diameter portion 341 of the projection 34 to be formed. In addition to being in contact with the terminal end 4y1 of the long hole 4y provided in the elbow rest 4, the moderation mechanism 7 is one of the plurality of holding recesses 4h in which the small diameter part 342 of the projection 34 is provided in the elbow rest 4. Since these are selectively engaged, the following effects can be obtained. In other words, the small diameter portion 342 is secured as a component of the moderation mechanism 7 while the small diameter portion 342 is secured as a component of the moderation mechanism 7 while securing the torsional rigidity as a component of the moving end defining mechanism 6 that makes the large diameter portion 341 contact the terminal end 4y1 of the long hole 4y. The distance between the positions can be shortened, that is, the position can be adjusted more finely. The large-diameter portion 341 and the small-diameter portion 342 of the projection 34 are used as components of the moving end defining mechanism 6 and the moderation mechanism 7, respectively, so that the number of parts can be reduced.

  Further, the holding recess 4 h is provided in a movable member 71 connected to the elbow rest 4 via a spring 7 s, and the spring 7 s biases the movable member 71 in a direction in close contact with the small diameter portion 342 of the projection 34. In addition, since the movable member 71 can be retracted with the movement of the elbow rest 4, the moderation mechanism of the configuration widely used in the past using the protrusion and the movable member can be employed almost as it is, and it is easier. In addition, the above-described effects can be realized at low cost.

  The present invention is not limited to the embodiment described above.

  For example, the present invention may be applied between two members that can move relative to each other, not limited to a connection portion between an elbow rest provided on a chair and an elbow pad that supports the elbow rest from below. That is, a pin having a large-diameter portion and a small-diameter portion is provided on one member, and a concave portion such as a long hole formed through the large-diameter portion and a plurality of holding portions capable of holding the small-diameter portion are provided on the other member. And a moving end defining mechanism using the large-diameter portion and a concave portion such as the long hole, and a moderation mechanism using the small-diameter portion and the holding portion. In this case, the external force acting on the pin through the long hole is applied to the large diameter portion, so that the rigidity of the pin can be secured, and then the small diameter portion is engaged with the holding portion. A moderation mechanism in which the distance between the holding portions can be set short and finer adjustment is possible can be realized.

  Moreover, you may apply this invention not only to the site | part which pivotally attaches one member to the other member but to the site | part which connects two members so that sliding movement is mutually possible.

  Furthermore, the shape of the pin is not limited to that described above. For example, a cylindrical pin is provided on one member, and both ends of the pin are held by other parts of the one member. A groove is formed in the direction, the portion provided with the groove is a small-diameter portion, the other portion is a large-diameter portion, and the other member is provided with a recess capable of storing this pin over the entire height direction. It is also conceivable to provide a plurality of holding portions engageable with the small diameter portion. Even in this case, the external force acting on the pin via the edge of the recess of the other member is applied to the large diameter portion, and both ends of this pin are held by other parts of one member. Pin rigidity can be secured.

  In addition, various modifications can be made without departing from the spirit of the present invention.

The perspective view which looked at the chair which has an armrest and an armrest concerning one embodiment of the present invention from the front side. The perspective view which looked at the chair which has an armrest and an armrest concerning the embodiment from the back side. The side view of the chair which has an armrest and an armrest concerning the embodiment. The rear view of the chair which has an armrest and an armrest concerning the embodiment. The longitudinal cross-sectional view of the elbow rest and the armrest which concern on the same embodiment. The disassembled perspective view which shows the attachment aspect of the armrest which concerns on the same embodiment. The disassembled perspective view which shows the attachment aspect of the elbow pad which concerns on the same embodiment. The top view which shows the state which attached the elbow pad which concerns on the embodiment to the armrest. Xx sectional drawing in FIG.

Explanation of symbols

1 ... chair 3 ... elbow 34 ... protrusion (pin)
341 ... large diameter portion 342 ... small diameter portion 4 ... elbow rest 4h ... holding recess 4y ... long hole 6 ... moving end defining mechanism 7 ... moderation mechanism

Claims (5)

Two members that can move relative to each other, a moving end defining mechanism that defines the end of relative movement between the two members, and a plurality of moderation stop positions between the two members. A pinning mechanism having a large diameter portion and a small diameter portion on one member, wherein the moving end defining mechanism is a large diameter portion of the pin. And the moderation mechanism is selectively used as one of a plurality of moderator holding portions provided on the other member with a small diameter portion of the pin. 2. A member mounting structure characterized by being engaged with each other. The pin is a protrusion provided so as to protrude from the one member, and a base end portion of the protrusion is the large diameter portion, and a tip end portion of the protrusion is the small diameter portion. Item 1. A member mounting structure according to Item 1. The moderation element holding portion is provided in a moderation element holding member connected to the other of the two members via an urging means, and the urging means urges the moderation element holding member in close contact with the moderation element. 3. The member mounting structure according to claim 1, wherein the moderator holding member is retractable with the movement of the other of the two members. 4. 4. The member connection structure according to claim 1, wherein one member is pivotally attached to the other member. 5. The connection of members according to claim 1, wherein the two members that can move relative to each other are an elbow rest provided on a chair and an armrest supporting the elbow rest from below. Construction.

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