JP2016220866A - Memo table attachment structure of chair and chair using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a memo table attachment structure of a chair which enables attachment/detachment to be performed even with a simple structure and allows a memo table to be attached easily without wobbling, and further has excellent load resistance.SOLUTION: The memo table attachment structure of a chair includes a memo table 27, a memo table support arm 1 supporting the memo table 27, and a bearing part attached on the chair side and detachably/attachably inserted with the memo table support arm 1. While a memo table attachment pipe 10 as the bearing part is arranged on a chair body side, a shaft part 4 inserted into the memo table attachment pipe 10 and a contact part 2 pressed against a leg 6 and stopping rotation of the memo table support arm 1 in a front/rear direction of the chair with the shaft part 4 as a center are arranged on the memo table support arm 1 side. The shaft part 4 is inserted into the memo table attachment pipe 10 and the memo table support arm 1 is supported rotatably, the contact part 2 of the inclined memo table support arm 1 is pressed against the leg 6 and thereby the memo table support arm is inhibited from being rotated, and the memo table 27 is fixed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a memo stand mounting structure for a chair. More specifically, the present invention relates to a memo stand mounting structure for a chair for detachably mounting a memo stand side component on the chair body side, and a chair using the same.

  Conventionally, there is a memo stand mounting structure for detachably attaching a memo stand. For example, there are chairs that are detachably attached to one side of a chair seat by attaching and removing a memo stand in the horizontal direction (for example, Patent Documents 1 and 2).

  The memo stand mounting structure described in Patent Document 1 is a flat stacking chair having a slit-like gap that allows a flat support plate provided at the lower end of the memo stand frame to be inserted horizontally in the lower portion of the seat. The memo stand is detachably attached to the chair by inserting and removing the support plate at the lower end of the memo stand in the horizontal direction. A flat box-shaped mounting bracket that can be mounted under the seat is open on both left and right sides, and a synthetic resin slide member that connects the upper and lower guide plates at the ends in the interior cavity (guide groove). The memo stand is inserted from the inside to the outside and the support plate at the lower end of the memo stand frame is inserted into the slit formed between the upper and lower guide plates of the slide member from the outside to the inside of the chair. The structure is such that the frame is detachably held.

  Further, in the memo stand mounting structure described in Patent Document 2, the lower end of the non-circular cross-section mounting arm that supports the memo stand is bent inward into an L shape, and the bent portions are arranged parallel to each other under the seat. The memo stand is mounted by inserting it into the non-circular holes of the two fixing brackets. The mounting portion of the support arm that supports the memo stand to the chair and the shape of the hole that receives the mounting portion are made into a non-circular shape such as a quadrangle, an ellipse, or a D shape, for example, so that force is applied to the memo stand and the attachment portion Even if the rotating force works, the rotation is blocked and the memo stand posture is maintained. Also, the mounting arm that supports the memo stand can be removed by releasing the contact of the retaining spring.

Japanese Patent Laid-Open No. 08-24081 JP 08-182578 A

  However, in the memo stand support structure described in Patent Document 1, a structure that receives and supports all of the load applied to the memo stand between the support plate at the lower end of the memo stand support arm and the synthetic resin slide member / mounting bracket for inserting the support plate. Since it has a (cantilever structure), a load applied to the note pad is applied as a torque between them, so that the torsional strength needs to be considerably increased. Moreover, since the vertical bending in addition to the torque is simultaneously applied to the support plate, there is a risk of damage when a large load is applied. Therefore, the support plate and the synthetic resin slide member and mounting bracket for inserting the support plate are included. Both of them must be large rigid members, resulting in a large structure. For this reason, a large structure is provided under the seat, which causes a decrease in stacking efficiency.

  In addition, since the support plate at the lower end of the memo stand support arm is inserted into the slit so as not to rotate, a design clearance is required for attachment and detachment, and rattling cannot be completely eliminated. Therefore, rattling is likely to occur, noise is likely to be generated, and play makes the memo stand less stable when used.

  Moreover, it has a complicated structure combining a flat box-shaped mounting bracket, a synthetic resin slide member inserted into the mounting bracket, and a support plate at the lower end of the note frame sandwiched between the slide members. Since the number of parts increases, the cost becomes high.

  In addition, according to the memo stand mounting structure of Patent Document 2, one end of a support arm obtained by bending a square pipe into an L shape is inserted into the square hole so as to be non-rotatable. If a sufficient gap is not formed between them, the arm may not be easily inserted, and may be twisted and cannot be inserted into the square hole, or may be stopped during the insertion. In other words, since the non-circular shaft portion is fitted into the non-circular hole so as to be unrotatable, a design clearance is required for attachment and detachment, and rattling cannot be completely eliminated. Therefore, rattling is likely to occur. When the backlash increases, there is a problem that noise is likely to be generated. Furthermore, when the play is increased, the memo stand becomes unstable and the feeling of use becomes worse.

  Further, since it has a cantilever structure with an L-shaped support arm, the load applied to the memo stand is applied as a torque to the shaft portion as a rotation around the shaft, so that it is necessary to increase the strength against twisting. For this reason, in order to make the support arm high in rigidity, it is necessary to increase the strength by increasing the thickness of the square pipe, and there is a problem that the weight increases, and the bias of the center of gravity eventually causes a problem.

  In any case, according to the memo stand mounting structure described in Patent Documents 1 and 2, it is easy to attach and detach, and it is not easy to attach the memo stand without wobbling.

  The present invention provides a mounting structure for a memo stand of a chair that is detachable while having a simple structure, can be easily attached without wobbling, and has excellent load resistance. Objective.

  In order to achieve such an object, the invention described in claim 1 includes a memo stand, a memo stand support arm that supports the memo stand, and a bearing portion that is attached to a chair and detachably inserts the memo stand support arm. In the memo stand mounting structure of the chair, the bearing portion has a round hole in which the shaft center is arranged in the width direction of the chair, and the memo stand support arm includes a shaft portion inserted into the round hole of the bearing portion, and A memo stand support arm having an abutting portion for pressing the memo stand support arm about the shaft portion in the front-rear direction of the chair against the leg and stopping the pedestal, and the shaft portion is inserted into the shaft support portion. Is supported rotatably, and the contact portion of the inclined memo stand support arm is pressed against the leg of the chair so that the rotation is prevented and the memo stand is fixed.

  Moreover, in the memo stand mounting structure of the chair according to the invention of claim 2, the contact portion is not limited to a specific shape arrangement structure, but protrudes in parallel with the shaft portion from the side surface of the memo stand support arm. It is preferable that it is a rod-shaped object addressed to the front surface or the rear surface of the leg.

  In the memo stand mounting structure for a chair according to the invention described in claim 3, it is preferable that the abutting portion has a retaining portion that abuts against a side surface portion on the inner side of the leg. Here, the retaining portion is not limited to a specific shape arrangement structure, but it spreads toward the tip and generates a force that pulls the support arm toward the leg when the contact portion is applied to the leg. It is more preferable that the

  Moreover, in the memo stand mounting structure of the chair according to the invention of claim 5, the bearing part is not limited to a specific shape arrangement structure, but is a pipe straddling between the left and right leg frames of the chair. It is preferable.

  Further, in the memo stand mounting structure for the chair according to the invention of claim 6, the projection protruding in the radial direction is formed in the shaft portion, and the shaft portion and the protrusion are passed through the loading side of the shaft support portion. When a mooring member having a receiving opening and a notch is provided, and the position of the projection and the notch coincides, the shaft portion passes through the receiving opening and is inserted into or removed from the shaft receiving portion. If they do not match, the projection abuts the anchoring member so that the shaft portion and the projection receiving port cannot pass through.

  Moreover, the invention of Claim 7 is a chair provided with the memo stand attachment structure in any one of Claim 1 to 6.

  According to the memo stand mounting structure of the chair according to claim 1, the memo stand support arm can be moved in the front-rear direction of the chair around the shaft portion by simply inserting the shaft portion of the memo stand support arm horizontally into the chair bearing portion. The memo stand can be fixed by pressing the abutting portion against the chair leg while rotating to stop rotation of the memo stand support arm. And since the hole shape of the axial part of a memo stand support arm and the bearing part by the side of a chair is round, there is no restriction | limiting in the direction of the axial part at the time of insertion. In addition, the memo stand can be removed simply by pulling the shaft portion of the memo stand support arm horizontally from the chair bearing portion. That is, the detachability workability is good. Further, since the movement of the memo stand is prevented by constantly pressing the contact portion toward the leg by the load applied to the memo stand, it is possible to prevent the memo stand from rattling during use.

  Moreover, the force applied to the shaft portion can be reduced by providing the load applied to the memo stand not only to the shaft portion but also to the locking portion. That is, since the load applied to the memo stand is distributed and applied to the legs via the shaft portion and the contact portion of the memo stand support arm, the force applied to each of them is reduced, and the shaft portion, the shaft support portion and the memo stand support arm are reduced. Even if the rigidity of the part is lowered, it is hard to break. In particular, if the distance from the shaft part to the contact part hits the leg is increased, the force applied to the leg can be reduced, so that the memo stand support arm is not easily broken even if a thin and thin pipe is used. For this reason, since the memo stand support arm is thin and thin pipes are sufficient, it can be lightened, and the bias of the center of gravity when the memo stand is attached to the chair is reduced, so the state with the memo stand attached It is possible to improve the deterioration of stability.

Therefore, according to the memo stand mounting structure of the chair according to claim 1, the load resistance is excellent while being detachable with a simple structure. Furthermore, the insertion part of the memo stand support arm only has a round bar inserted into the round hole, so that the design can be satisfactorily fit.

  Moreover, according to the memo stand mounting structure of the chair according to the invention of claim 2, the abutment portion protrudes in parallel with the shaft portion from the side surface of the memo stand support arm and is directed to the front or rear surface of the leg. Therefore, the abutment portion is reliably pressed against the front surface or the rear surface of the leg, so that the memo stand support arm can be fixed.

  According to the memo stand mounting structure of the chair according to the third aspect of the invention, since the contact portion has the retaining portion that contacts the side surface portion on the inner side of the leg, the contact portion is pressed against the leg. At the same time as being put in use, the retaining portion abuts against the side surface portion on the inner side of the leg so that the movement of the memo stand supporting arm to the outside in the width direction of the chair is not hindered.

  According to the memo stand mounting structure of the chair according to the invention described in claim 4, the retaining portion extends toward the tip, and the support arm is pulled toward the leg when the contact portion is applied to the leg. Since the force is caused, the memo stand support arm is pulled inward in the width direction of the chair at the same time as it is in use, and it can be prevented from coming out and rattling can be prevented by tightening in the width direction.

  According to the memo stand mounting structure for a chair according to the invention described in claim 5, since the bearing portion is formed by a pipe straddling between the left and right leg frames of the chair, one pipe is welded. As a result, the bearing portion can be configured, the structure is simple, and the leg joint rigidity between the left and right legs is increased. Further, since the additional equipment on the chair body side only welds one pipe, the additional manufacturing cost can be reduced. In addition, the structure is simple and the number of assembly steps is reduced.

  In addition, according to the memo stand mounting structure for a chair according to the invention described in claim 6, since the memo stand can be attached and detached only at a predetermined position, the memo stand is retracted at that position when the memo stand is used or when the user leaves the seat. By setting the position to a position other than the position, it is possible to prevent an unexpected situation such as the memo stand support arm falling or dropping when the memo stand is used or the memo stand is moved to the retracted position. For this reason, it becomes easy to rotate the memo stand backward and to enter and exit.

[BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view of the chair with a memo stand to which one Embodiment of the memo stand attachment structure of the chair of this invention is applied. It is the perspective view seen from the back lower part of the chair with the memo stand. 1A and 1B are diagrams showing an embodiment of a memo stand support arm, wherein FIG. 1A is a left side view, FIG. 1B is a front view, and FIG. 3C is a heel member and a memo stand that are configured integrally with a contact portion and a retaining portion. It is a bottom view which shows the relationship with a support arm. It is the perspective view seen from the bottom which shows one Embodiment of the bearing member by the side of a chair, and shows the relationship between the bearing part in an assembly | attachment state and a leg. It is a perspective view which shows the relationship between the bearing part by the side of a chair, and a leg, and shows the state which decomposed | disassembled the mooring member. It is a perspective view which shows the relationship between the bearing part by the side of a chair, and a memo stand support arm, and shows the state before inserting a protrusion in a mooring member. It is a perspective view which shows the relationship between the bearing part by the side of a chair, and a memo stand support arm, and shows the relationship between the protrusion in the use state of the memo stand after inserting a protrusion in a mooring member, and the receiving port of a mooring member.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

  1 and 2 show an example of a chair with a memo stand to which one embodiment of a memo stand mounting structure for a chair according to the present invention is applied. This chair with a memo stand is composed of a memo stand side constituent member and a chair body side receiving member that detachably supports the memo stand side constituent member, and the memo stand side constituent member is a chair as required. It can be removed from the main body.

  In the case of the present embodiment, the bearing portion provided as the receiving member provided on the chair body side includes one pipe (hereinafter referred to as a memo stand mounting pipe) 10 fixedly connected to the leg connecting bracket 12 and the mooring member 8. It consists of and. Here, the memo stand mounting pipe 10 mainly supports the memo stand support arm 1 in terms of strength. Therefore, in this specification, the bearing part on the chair body side mainly refers to the memo stand mounting pipe 10.

  The front leg 7 and the rear leg 6 are connected to each other in the front-rear direction via a leg connecting bracket 12. Further, the left and right front legs 7 and the rear legs 6 are connected to each other via a leg joint pipe 11. Here, the connection by the leg connecting bracket 12 and the leg joint pipe 11 is generally performed by automatic welding such as TIG welding, but is not particularly limited thereto, and is also performed by other fastening means as necessary. .

  For example, as shown in FIGS. 4 and 5, the leg connecting bracket 12 includes a side plate portion 13 having a trapezoidal shape, a top seat receiving portion 14 bent so as to be orthogonal to the side plate portion 13, and a seat receiving portion 14. Leg portions 15 bent vertically downward at both ends in the front-rear direction and straddling the leg joint pipe. The peripheral surfaces near the upper ends of the front legs 7 and the rear legs 6 are applied to the slopes of the trapezoidal side plate 13 and are welded. A leg joint pipe 11 is welded between the left and right front legs and the rear legs. Further, the front and rear leg joint pipes 11 are connected to each other by being welded to the leg portions 15 of the leg connecting bracket 12 straddling them. Thus, a pair of left and right leg frames are formed that open in a trapezoidal shape in the front-rear direction and are arranged in parallel between the left and right.

  At the inside of the side plate portion 13 of the leg connecting bracket 12, a memo stand is attached as a bearing member for supporting the shaft portion 4 of the memo stand support arm 1 between the front leg joint pipe 11 and the rear leg joint pipe 11. A pipe 10 is provided. In the case of this embodiment, while forming the through-hole 16 which the axial part 4 of the memo stand support arm 1 penetrates in the center part (near the intermediate point of a front leg and a rear leg) of the side-plate part 13 of the left and right leg coupling metal fittings 12. The memo stand mounting pipe 10 is arranged over the left and right leg coupling fittings 12 coaxially with the through-hole 16 and both ends are welded to the left and right leg coupling fittings 12, respectively. . The memo stand mounting pipe 10 is installed between the left and right leg frames in terms of strength, center of gravity, and the right and left mounting of the memo stand can be selected. preferable. However, this is not particularly important, and in some cases, it may be configured to exist only in one side region of the chair. For example, although not shown, a member straddling between the front and rear leg joint pipes 11 and a member having a round hole for inserting the shaft portion 4 of the memo stand support arm 1 are orthogonally arranged and welded. A structure such as a T-shaped bearing member, that is, a structure in which the memo stand mounting pipe 10 is installed halfway between the left and right leg frames may be employed. Furthermore, such a T-shaped bearing member may be provided independently for each of the right leg frame and the left leg frame. In this case, since the three points are supported between the leg connecting bracket and the front and rear leg joint pipes, the rigidity as the bearing member is not significantly deteriorated. In addition, since the bearing member can be constructed near the leg connecting bracket while avoiding the center part where the seat plate is the lowest, it is further under the seat than when one note stand mounting pipe is bridged between the left and right leg connecting brackets. Therefore, the stacking efficiency is rarely reduced.

  On the outside of the side plate portion 13 of the leg connecting metal 12, the anchoring member 8 is disposed in parallel with the leg connecting metal 12 spaced apart. The mooring member 8 is provided with a receiving port 17 composed of a circular hole concentric with the memo stand mounting pipe 1, and a notch 18 through which a radial projection 5 provided on the shaft portion 4 passes at a part of the periphery. It has been. Only when the positions of the notch 18 and the protrusion 5 match, the protrusion 5 passes through the receiving port 17 and is inserted into the space between the leg connecting bracket 12 and the mooring member 8 and the shaft portion of the note support arm 1. 4 can be inserted further into the memo stand mounting pipe 10 to complete the attachment of the memo stand support arm 1 (see FIGS. 6 and 7). In this state, the protrusion 5 can freely rotate together with the shaft portion 4 to enable the memo stand support arm 1 to be freely rotatable.

  In the present embodiment, the protrusion 5 provided near the base of the shaft portion 4 is formed by inserting a spring pin into a radial hole formed in the shaft portion 4. The spring pin is inserted so as to pass through the hole of the shaft portion 4 and the collar 9 fitted around the hole, and fixes the collar 9 at the same time. The collar 9 regulates the insertion depth of the shaft portion 4 into the memo stand attachment pipe 1 and keeps the attachment position (approach distance) of the memo stand support arm 1 with respect to the leg frame constant. That is, the position of the memo stand support arm 4 inserted into the memo stand mounting pipe 10 is kept constant by the collar 9 and the mooring member 8. For example, the collar 9 is sized to abut on the end face of the memo stand mounting pipe 10 that is fitted into the through hole 16 of the side plate portion 13 of the leg connecting member 12.

  The mooring member 8 is made of, for example, a plate material, and is arranged in parallel by being fixed to the side plate portion 13 of the leg connecting bracket 12 by screwing, and the projection of the shaft portion 4 of the note support arm 1 between the leg connecting bracket 12. The space | interval and space which accommodates 5 are comprised. For example, the anchor member 8 and the leg connecting member 12 are connected to the female member 20 provided on the side plate 13 of the leg connecting member 12 with a collar 19 interposed between the anchor member 8 and the side plate 13 of the leg connecting member 12. This is performed by screwing a screw (not shown) from the outside. In the figure, reference numeral 21 denotes a countersink hole through which a screw passes, and 26 denotes a cover that covers the leg connecting metal 12.

  Here, the protrusion 5 of the shaft portion 4 and the anchoring member 8 are not necessarily provided. The moment that the memo stand support arm 1 rotates about the shaft portion 4 acts and the abutment portion 2 is always pressed against the rear leg 6 or the front leg 7, so that the memo stand support arm 1 is pulled out sideways. It will not fall off the chair unless external force is applied. In addition, the retaining effect of the memo stand support arm 1 can be obtained to some extent by the presence of the retaining portion 3. That is, the mooring member 8 may have a simple round hole / receiving port 17 that allows the shaft portion 4 of the memo stand support arm 1 to be inserted. Or may be unnecessary depending on circumstances.

  The seat receiving portion 14 of the leg connecting bracket 12 is provided with a screw through hole 23 for fixing a backrest support rod (back support rod) 22 bent into, for example, an L shape. The back support rod 22 is placed on the seat receiving portion 14 of the leg connecting bracket 12 and is fixed to the seat receiving portion 14 with screws or the like. In the case of the present embodiment, a seat 25 is further placed and fixed to the back support rod 22 on the seat receiving portion 14 via a metal fitting or the like. Of course, in the practice of the present invention, the structure of the chair, particularly the structure of the legs, is not limited to that described above, and it goes without saying that it can be applied to any type of chair to which a memo stand is attached. In the figure, reference numeral 24 denotes a spine.

  The memo stand support arm 1 includes a shaft portion 4 inserted into a chair side memo stand mounting pipe (round hole shaft support portion) 10, and the memo stand support arm 1 centered on the shaft portion 4. There is at least a contact portion 2 that is pressed against the rear leg 6 or the front leg 7 to stop the rotation of the chair in the front-rear direction. In the case of the memo stand support arm 1 of the embodiment shown in FIG. 1 and FIG. 2, L on the inner side surface of the lower end portion 1 b located on the opposite side to the upper end portion 1 a on which the memo stand 27 is supported across the shaft portion 4. The abutting portion 2 and the retaining portion 3 are integrally formed by fixing the shaped eaves member 28 by, for example, welding. The retaining portion 3 is disposed so as to intersect the inner surface of the leg 6 or 7 when the abutting portion 2 is pressed against the leg, and the note support arm 1 moves to the outside in the width direction of the chair. To stop doing. That is, the contact part 2 and the retaining part 3 in the present embodiment are directed from the area of the lower end part 1b of the note stand support arm slightly bent so as to be addressed along the rear leg 6 toward the inside of the chair. It forms a bowl shape that protrudes and bends toward the rear, and is addressed to the front side of the rear leg 6, and the rear leg 6 has a lower end of the memo stand supporting arm (the end opposite to the end supporting the memo stand) ) The area 1b is received.

  As shown in FIG. 3C, the retaining portion 3 has a slight inclination (inclination angle θ) so that the distance increases toward the tip and the distance decreases toward the base side. It is preferable. In this case, when the retaining portion 3 hits the inner side surface of the rear leg 6 first, the memo stand support arm 1 rotates and tilts around the shaft portion 4 and at the same time, the lower end portion 1b of the memo stand support arm 1 When the abutting portion 2 abuts against the front surface of the rear leg 6 while being relatively pulled toward the rear leg 6 side, the rear leg 6 and the retaining portion 3 are fitted with no rattling. To be accepted. Further, the hook member 28 is prevented from being caught by clothes or the like because the retaining portion 3 is disposed inside the rear legs 6 (between the left and right rear legs). Although not shown, it is preferable to cover the flange member 28 with a resin sleeve (not shown) to improve the function as an anti-slip and cushioning material. In this case, it not only functions as a receiver but also serves as a backlash stop.

  When the memo stand 27 is raised to the back side, the abutment portion 2 abuts against the back side of the front leg 7 so that the memo stand 27 does not tilt further, and at the same time the memo stand 27 is fixed. can do. Moreover, as long as the notch 18 is provided around the receiving port 17 of the anchoring member 8 that accommodates the shaft part 4 and the position of the protrusion 5 of the shaft part 4 does not match, the protrusion 5 is caught by the anchoring member 8 and the shaft part 4 is The memo stand 27 does not fall because it is prevented from falling off the pipe 10.

  Here, the memo stand support arm 1 according to the present embodiment is inclined with respect to the rear legs 6 and the front legs 7 spreading in the front-rear direction in a trapezoidal shape when viewed from the side when used on a chair. Therefore, the upper end 1a is bent upward from the middle, and the memo stand is disposed in front of the abdomen of the seated person above the front end of the seat and is kept horizontal. On the other hand, the lower end 1b of the memo stand support arm 1 is slightly bent downward so as to be disposed along the rear leg 6 when the memo stand is used, so that it does not protrude rearward from the rear leg 6. It is also considered mechanically. The fixing force is increased by the line contact rather than the point contact.

  Here, the memo stand support arm 1 shown in FIGS. 1 to 3 is provided so as to receive a reaction force on the rear leg 6 side in the direction opposite to the load applied to the memo stand 27 around the shaft portion 4 ( The first type lever structure) may be configured to receive a reaction force on the front leg 7 side in some cases. For example, although not shown, the memo stand support arm 1 is bent into a substantially U shape, and includes a shaft portion 4 at the bending point and a retaining portion 3 and a contact portion 2 that extend rearward on the lower end side. The member 28 may be provided, and the memo stand support arm 1 may be fixed by pressing the front leg 7 from the front side at the contact portion 2 (first type lever structure). In addition, the memo stand support arm 1 has a memo stand 27 attached to one end and the contact portion 2 provided to the other end side. However, the present invention is not limited to this. The contact portion 2 may be provided between the contact portion 2 and the contact portion 4. That is, the memo stand support arm 1 is branched between the shaft portion 4 and the portion supporting the memo stand 27, and the retaining portion 3 and the contact portion 2 that extend forward to the lower end of the branched arm are provided. You may make it provide the eaves member 28 to comprise, and it may be made to address to the rear surface side of the front leg 7 (2nd type lever structure). In either case, the shaft 4 of the memo stand support arm 1 is inserted into the memo stand mounting pipe 10 on the chair side, and the memo stand support arm 1 is rotated so that the memo stand support arm 1 tilts forward. Since the abutting portion 2 at the lower end of 1 is pressed against the front leg 7 and fixed, it can be easily mounted.

  Since the contact portion 2 only needs to function as a lever action point, the contact portion 2 has a portion in contact with the front surface or the rear surface of the rear leg 6 or the front leg 7 in the direction of rotation about the shaft portion (fulcrum) 4. If you do. Moreover, even if there is no retaining portion 3 that is caught on the inner side surface of the leg, the moment that the memo stand support arm 1 tries to rotate around the shaft portion 4 due to the weight of the memo stand 27 or the load applied to the memo stand 27 is always constant. Since the contact part 2 is always pressed against the leg part 6 or 7 by acting, it does not fall off the chair unless an external force that pulls the memo stand support arm 1 to the side works. Therefore, it may not be a saddle type with the retaining portion 3 but may be a simple linear bar that crosses the front side or the rear side of the legs 6 or 7 in the width direction of the chair. That is, the retaining portion 3 is not always necessary. Further, in some cases, the abutting portion 2 bends the lower end portion 1b of the memo stand supporting arm 1 inward toward the rear leg 6 or the front leg 7 and directly presses against the rear leg 6 or the front leg 7. A part of the memo stand support arm 1 may function as the contact portion 2. In this case, the lower end portion 1b of the memo stand support arm 1 preferably has a large contact area in order to reduce the surface pressure. It is preferable that it bend | folds so that it may become substantially equal to the angle of this, and it may arrange | position along a leg.

  The top plate 29 provided at the upper end of the memo stand support arm 1 may be fixed. However, it is preferable to make the chair user easy to stand up or to avoid getting in the way when trying to stand up unexpectedly. It is preferably supported so as to be freely rollable. Therefore, for example, as shown in FIG. 2, the memo stand 27 includes a top plate 29, a memo stand support arm 1, a top plate receiver 30 that supports the top plate, a memo stand support arm 1, and a top plate receiver 30. It is comprised from the hinge coupling tool 31 which connects so that rotation is possible. The hinge connector 31 includes, for example, an elliptical support portion 32 at the upper end of the memo stand support arm, the bearing pipe 33 and the other bearing pipe 34 provided on the top plate receiver 30 side, and a connection pin (not shown). And is provided so as to be rotatable in the left-right direction around a hinge shaft arranged in the front-rear direction. In this case, when the chair user tries to stand up, the memo stand 27 is pushed up by the body of the chair user to open the front of the chair.

  According to the memo stand mounting structure according to the present embodiment, the memo stand support arm 1 can be attached to the chair simply by inserting the shaft portion 5 into the memo stand mounting pipe 10 and rotating it. At the same time as being pressed against the front surface of the rear leg 6, the memo stand 27 is set at a predetermined use position. At this time, since the cross-sectional shapes of the shaft portion 4 and the memo stand mounting pipe 10 are round, the angle at the time of insertion is not limited, and for example, it can be inserted at an angle that the user can easily hold. Then, when passing the projection 5 at the base of the shaft portion 4 through the receiving port 17 of the anchoring member 8, the angle is adjusted, that is, the position is adjusted so that the positions of the projection 5 and the notch 18 coincide with each other, and the projection is further inserted. (See FIGS. 6 and 7). Then, the memo stand support arm 1 once inserted into the chair side bearing portion, that is, the mooring member 8 and the memo stand mounting pipe 10 is prevented from being detached by the mooring member 8 and the retaining member 3. Therefore, the memo stand can be stably used at the same time as the memo stand is set to the use state.

  On the other hand, when the memo stand 27 is removed from the chair, the memo stand support arm 1 is slightly raised (pulled up), the retaining portion 3 is removed from the leg 6, and then the memo stand support arm 1 is pulled horizontally to mooring members. The notch 18 of 8 and the protrusion 5 of the shaft 4 are aligned or rotated while pulling the memo stand support arm until they match, and the shaft 4 of the memo stand support arm 1 is pulled out and removed. Incidentally, when the protrusion 5 on the memo stand support arm 1 side and the notch 18 of the mooring member 8 are not provided, the contact portion 2 is further away from the leg or when the retaining portion 3 is provided. If the retaining part 3 is not caught on the leg, it can be removed at any angle.

  According to the memo stand mounting structure configured as described above, the shaft portion 4 is inserted into the chair-side memo stand mounting pipe 10 and the lower end contact portion 2 is received by the rear leg 6 and fixed. Therefore, since the force applied to the memo stand 27 is distributed and received by the legs via the shaft portion 4 and the contact portion 2, the load on the supporting structure of the shaft portion 4, that is, the memo stand mounting pipe 10 is reduced. The In other words, it can withstand much lower rigidity than the case where only the shaft portion 4 supports all the force applied to the memo stand 27. For this reason, the shaft portion 4 itself can be made thin, the pipe constituting the memo stand support arm 1 can be made thin, and the diameter can be made thin.

  Moreover, since the memo stand support arm 1 can be made thin and thin, the weight is reduced and the center of gravity of the chair is less biased, so that the stability of the chair is increased. Until now, the weight related to the memo stand was large, and it was easy to fall over when the chair was tilted to the side where the memo stand was mounted. However, in the case of this embodiment, it was difficult to fall over. In addition, since the memo stand mounting pipe is inserted so as to cross the center of the seat, the center of gravity moves closer to the center of the seat and the stability is further increased.

  Moreover, the shaft portion 4 of the memo stand support arm 1 can be easily mounted by simply inserting the shaft portion 4 into the memo stand mounting pipe 10 on the chair side and rotating it.

  Further, when the memo stand support arm 1 is set up vertically, if the projection 5 of the shaft portion 4 and the notch 18 of the mooring member 8 are provided so as to coincide with each other, the memo stand is lifted up. If the support arm is rotated in the reverse direction and the shaft of the memo stand support arm is positioned vertically (the central portion excluding both ends of the upper and lower ends) and pulled to the near side (by pulling the shaft from the pipe), it is easy Can be removed.

  Furthermore, if the anchoring member which can insert the axial part of a memo stand support arm is provided in the right and left of a chair, a memo stand can be mounted | worn as needed in the right side or the left side of a chair. Moreover, it is preferable that a blindfold cover that closes the receiving port of the mooring member when the memo stand is not used can be detachably mounted.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the chair-side bearing portion is configured by the memo stand mounting pipe 10 arranged in parallel between the front and rear leg joint pipes 11 connecting the left and right leg frames. However, the present invention is not particularly limited to this, and depending on circumstances, either the front or rear leg joint pipe 11 itself may be configured as a bearing portion. In this case, the additional manufacturing cost can be further reduced by further reducing the additional equipment on the chair body side.

  Further, in this embodiment, the note mounting pipe 10 constituting the bearing portion is welded to the central portion of the leg connecting bracket 12 that connects the front leg 7 and the rear leg 6, but the curvature of the seat is large. For example, the memo stand mounting pipe 10 may be provided directly on the front leg 7 or the rear leg 6. For example, a memo stand mounting pipe may be arranged and welded between the left and right front legs or between the rear legs.

  Moreover, although the above-mentioned embodiment mainly demonstrated the case where it applied to the chair provided with the trapezoid leg frame which connected the front leg 7 and the rear leg 6 with the leg connection metal fitting 12, it is especially limited to this. Instead, for example, it is also possible to apply to a chair of a leg frame of a type in which all parts supporting the front leg, the rear leg and the seat are bent by pipes or welded. In this case, it is sufficient to provide a memo stand mounting pipe on either the frame portion supporting the seat or the front and rear legs.

  Further, in the above-described embodiment, the memo stand is mainly described by giving an example in which the memo stand is set to be tilted forward with the shaft portion as a center, and the memo stand support frame is vertically raised and removed. However, the present invention is not particularly limited to this, and in some cases, it may be set so that it is tilted backward with the shaft portion as the center, and may be removed after being raised forward. At this time, when the so-called first-type lever structure is configured, the memo stand support arm is configured to apply a force toward the front of the chair with the contact portion of the locking portion being assigned to the rear leg or the rear leg surface of the front leg. When the so-called second-type lever structure is configured, the contact portion of the locking portion is assigned to the front surface of the rear leg, and the force toward the rear of the chair is received.

DESCRIPTION OF SYMBOLS 1 Memo stand support arm 2 Contact part 3 Detachment part 4 Shaft part of memo stand support arm 5 Protrusion of shaft part 6, 7 Leg 8 Mooring member 10 Pipe for attaching memo stand which constitutes shaft support part 17 Acceptance of anchoring member口 18 Notch at the periphery of the receiving port of the mooring member

Claims (7)

In a memo stand mounting structure of a chair comprising a memo stand, a memo stand support arm that supports the memo stand, and a shaft support portion that is attached to the chair side and removably inserts the memo stand support arm,
The shaft support portion has a round hole having an axis arranged in the width direction of the chair,
The memo stand support arm is pressed against a leg by a shaft portion inserted in a round hole of the shaft support portion and rotation of the memo stand support arm in the front-rear direction around the shaft portion. A contact portion to stop,
The shaft portion is inserted into the shaft support portion so that the memo stand support arm is rotatably supported, and the contact portion of the inclined memo stand support arm is pressed against the chair leg to prevent rotation. The memo stand mounting structure of the chair, wherein the memo stand is fixed. 2. The chair memo according to claim 1, wherein the abutment portion is a bar-like object that protrudes in parallel with the shaft portion from a side surface of the memo stand support arm and is addressed to a front surface or a rear surface of the leg. Base mounting structure. 3. The memo stand mounting structure for a chair according to claim 1, wherein the abutting portion has a retaining portion that abuts against a side portion on the inner side of the leg. The chair according to claim 3, wherein the retaining portion extends toward a tip, and causes a force to draw the support arm toward the leg when the contact portion is applied to the leg. Memo stand mounting structure. 5. The memo stand mounting structure for a chair according to claim 1, wherein the shaft support portion is a pipe straddling between the left and right leg frames of the chair. A protrusion projecting in the radial direction is provided on the shaft portion, and a mooring member having a receiving opening and a cutout of a size through which the shaft portion and the protrusion pass is provided on the loading side of the shaft support portion, When the positions of the protrusion and the notch coincide with each other, the shaft portion passes through the receiving port and can be inserted into or withdrawn from the shaft bearing portion. 6. The chair memo stand according to claim 1, wherein the protrusion makes contact with the mooring member so that the shaft portion and the protrusion cannot pass through the receiving port. 6. Mounting structure. A chair provided with the memo stand attachment structure in any one of Claim 1 to 6.