JP5641896B2 - Swingable storage chair and shock absorber case - Google Patents

Description

  The present invention relates to a swing-accommodating chair provided with a shock absorber and capable of swinging a seating portion from a use position to a retracted position, and a shock absorber case for housing the shock absorber.

  Conventionally, a base portion fixed to a fixed object such as a floor, a seat portion having a back and a seat coupled to each other, a lower end portion connected to the base portion so as to be swingable in the front-rear direction and an upper end portion in the front-rear direction There has been known a swing-and-hold type chair including a front leg portion and a rear leg portion that are swingably connected (Patent Document 1).

  In such a swing-storing chair, a configuration in which a shock absorber such as a damper is attached between the front leg portion and the rear leg portion in order to adjust the swing speed is conceivable. For example, Patent Document 2 describes that a buffer means such as a damper may be attached between the upper end portions of the front leg column and the rear leg column.

JP 2002-028043 A JP 2009-172086 A

  The following configuration is conceivable as a configuration for attaching the shock absorber. That is, one end of the shock absorber is fixed to the front leg, and the other end of the shock absorber is fixed to the rear leg. In this case, it is necessary to dispose the shock absorber between the upper end portion of the front leg portion and the upper end portion of the rear leg portion. Therefore, a large and expensive shock absorber is required.

  Furthermore, in this case, it is necessary to attach a fixing member for fixing the shock absorber to the front leg portion and the rear leg portion. For this reason, the manufacturing cost of the swingable storage chair is increased. Moreover, since it is necessary to use a tool in order to attach or remove the shock absorber, the replacement of the shock absorber becomes complicated. In addition, foreign matter may adhere to the cylinder of the shock absorber and damage the shock absorber.

  The shock absorber attached in this manner functions over a period in which the seating portion is swung from the use position to the storage position or from the storage position to the use position. Therefore, when the seating portion is swung from the use position to the storage position, the seating portion is always swung at a low speed. Further, when the user swings the seating portion from the storage position to the use position, a large force is required.

  In order to solve the above-described problems, the swing-storable chair of the present invention includes a seating part and a base part, and swings between a use position for sitting on the seating part and a storage position for storing the seating part. A swingable and retractable chair, the first leg and the second leg connected to the seat and the base, and a buffer disposed between the first leg and the second leg An apparatus; a first shaft inserted into a first shaft hole provided in a lower portion of the first leg portion; and a second shaft inserted into a second shaft hole provided in a lower portion of the second leg portion. A third shaft inserted into a third shaft hole provided in the upper part of the first leg, and a fourth shaft inserted into a fourth shaft hole provided in the upper part of the second leg. A distance between the first shaft and the second shaft is greater than a distance between the third shaft and the fourth shaft. By shortening, the first to fourth shafts constitute a non-parallel four-bar link, and the end of the shock absorber is separated from the first leg in the use position, and is stored from the use position. A contact with the first leg is made at an intermediate position of the swinging motion in the position direction.

  According to the swingable storage chair of the present invention, when the seating portion is swung from the use position to the storage position, it can be swung quickly at a high speed from the use position to before the intermediate position. Then, it can be slowly swung from the intermediate position to the storage position at a low speed. Thereby, when it is desired to secure a space for a person who passes the back side of the swinging and storing chair, the seating portion can be quickly swung. In addition, this makes it possible to provide an oscillating and retractable chair that eliminates impact noise and is excellent in quietness.

  The shock absorber case according to the present invention is a shock absorber case for housing a shock absorber disposed between the first leg portion and the second leg portion of the swinging and retractable chair. An accommodating portion for accommodating the device, a first fitting groove for fitting the first shaft of the first leg portion, and a second fitting for fitting the second shaft of the second leg portion. A groove is provided.

  According to the shock absorber case of the present invention, the first shaft of the first leg can be fitted into the first fitting groove, and the second shaft of the second leg can be fitted into the second fitting groove. Therefore, attachment and removal can be easily performed. The shock absorber housed in the shock absorber case is disposed at a position straddling the first shaft of the first leg and the second shaft of the second leg. Therefore, it is possible to use a small shock absorber that is inexpensive and has a long life. Thereby, the manufacturing cost of a rocking and storing type chair can be lowered.

It is a schematic side view which shows the state which has a seating part in a storage position. It is a schematic side view which shows the state which has a seating part in a use position. It is the schematic explaining the operation | movement which rock | fluctuates from a use position to a storage position. It is the schematic side view and schematic sectional drawing explaining the leg part located in a rear side. It is the schematic side view and schematic sectional drawing explaining the leg part located in the front side. It is a schematic sectional drawing explaining the structure of a buffer device. It is a schematic plan view which shows a mode that the buffering device was seen from upper direction. It is the schematic sectional drawing and schematic side view of the case for shock absorbers. It is a schematic rear view and a schematic front view of the shock absorber case. It is a schematic sectional drawing of the case for shock absorbers.

  FIG. 1 shows a rocking and storing chair 1 in a storage position for storing a seating portion. In this storage position, the seat portion 21 of the seating portion 2 of the swingable storage chair 1 is stored under a desk or the like (not shown). FIG. 2 also shows the swing-and-storable chair 1 in a use position for sitting on the seat. In this use position, the user can sit on the seating portion 2 of the swingable storage chair 1.

  As shown in FIGS. 1 and 2, the swinging and retractable chair 1 includes a seat 2 having a seat 21 and a back 22, a base 5, and a first leg 3 connected to the seat 2 and the base 5. And a second leg 4. Further, the swinging and retractable chair 1 includes a first shaft 31 inserted in a first shaft hole provided in the lower portion of the first leg portion 3 and a second shaft hole provided in the lower portion of the second leg portion 4. The second shaft 41 inserted into the first leg portion 3, the third shaft 32 inserted into the third shaft hole provided in the upper portion of the first leg portion 3, and the fourth shaft hole provided in the upper portion of the second leg portion 4. And a fourth shaft 42 inserted into the. Then, by making the distance between the first shaft 31 and the second shaft 41 shorter than the distance between the third shaft 32 and the fourth shaft 42, the first shaft 31, the second shaft 41, the first shaft The three shaft 32 and the fourth shaft 42 constitute a non-parallel four-bar link.

  The seat part 21 and the back part 22 of the seat part 2 indicated by dotted lines in FIGS. 1 and 2 are connected to each other. And the seating part 2 is integrally formed using materials, such as a plywood or a fiber reinforced plastic. Such a seating portion 2 can be formed by a method such as blow molding or injection molding. In addition, you may connect the seat part 21 and the back part 22 which were formed independently by a connection member.

  Moreover, the seating part 2 has the bracket 6 attached via connection members, such as a volt | bolt. The bracket 6 is attached to the lower surface of the seat 2, that is, the surface on the base 5 side of the seat 21. Such a bracket 6 can be formed by a method such as press working or casting using a material such as a steel plate or an aluminum alloy.

  A first leg portion 3 located on the rear side of the swingable retractable chair 1 is connected to the bracket 6 so as to be swingable. That is, the upper end portion of the first leg 3 is connected to the bracket 6 via the upper third shaft 32 (third shaft). The upper third shaft 32 passes through a pair of shaft holes provided in the bracket 6 and a pair of shaft holes provided in the first leg 3. Further, the second leg portion 4 located on the front side of the swingable storage chair 1 is also connected to the bracket 6 so as to be swingable. That is, the upper end of the second leg 4 is connected to the bracket 6 via the upper fourth shaft 42 (fourth shaft). The upper fourth shaft 42 passes through a pair of shaft holes provided in the bracket 6 and a pair of shaft holes provided in the second leg portion 4. In addition, the 1st leg part 3 and the 2nd leg part 4 can be formed by methods, such as press work or casting, using materials, such as a steel plate or an aluminum alloy.

  The lower end of the first leg 3 is connected to the base 5 via a lower first shaft 31 (first shaft) so as to be swingable. The lower first shaft 31 passes through a pair of shaft holes provided in the base portion 5 and a pair of shaft holes provided in the first leg portion 3. Further, the lower end portion of the second leg portion 4 is connected to the base portion 5 via a lower second shaft 41 (second shaft) so as to be swingable. The lower second shaft 41 passes through a pair of shaft holes provided in the base portion 5 and a pair of shaft holes provided in the second leg portion 4. The base 5 is fixed to a fixed object such as a floor, a desk, or a wall by a fixing member such as a bolt. Note that the base 5 can be formed by a method such as press working or casting using a material such as a steel plate or an aluminum alloy.

  FIG. 3 shows a state in which the swingable storage chair 1 is swung from the use position on the right side of the drawing to the storage position on the left side of the drawing through the middle position in the center of the drawing. Note that the intermediate position is an arbitrary position that passes in the middle of the operation of swinging the swingable storage chair 1 from the use position toward the storage position.

  When storing the seating portion 2, the user swings the swingable storage chair 1 from the use position through the intermediate position in the storage position direction indicated by the arrow 100. On the other hand, when the user sits on the seat portion 2, the user swings the swingable storage chair 1 from the storage position through the intermediate position in the direction of the use position indicated by the arrow 200. In the present specification, the direction indicated by the arrow 100 is referred to as the front of the swingable retractable chair 1, and the direction indicated by the arrow 200 is referred to as the rear of the swingable retractable chair 1.

  A central axis 330 of the upper third shaft 32 is a swing axis of the first leg 3 with respect to the bracket 6. Further, the central axis 430 of the upper fourth shaft 42 becomes the swing axis of the second leg 4 with respect to the bracket 6. The upper third shaft 32 is disposed at a position behind the upper fourth shaft 42, that is, at a position closer to the back portion 22. On the other hand, the central axis 310 of the lower first shaft 31 is the swing axis of the first leg 3 with respect to the base 5. Further, the central axis 410 of the lower second shaft 41 becomes the swing axis of the second leg 4 with respect to the base 5. The lower first shaft 31 is disposed at a position behind the lower second shaft 41, that is, at a position closer to the back portion 22. Further, the lower first shaft 31 is disposed at a position closer to the seat portion 21 than the lower second shaft 41, that is, at a position farther from the ground 500, which is the placement surface of the swingable retractable chair 1. Therefore, the lower first shaft 31 is disposed at a position higher than the lower second shaft 41 with respect to the ground 500.

  The distance between the central axis 310 of the lower first shaft 31 and the central axis 410 of the lower second shaft 41 is between the central axis 330 of the upper third shaft 32 and the central axis 430 of the upper fourth shaft 42. Shorter than the distance. Furthermore, the distance between the center axis 310 of the lower first shaft 31 of the first leg 3 and the center axis 330 of the upper third shaft 32 is the center axis of the lower second shaft 41 of the second leg 4. It is substantially equal to the distance between 410 and the central axis 430 of the upper fourth shaft 42. For convenience of explanation, FIG. 3 virtually shows the non-parallel four-bar link 600 by a solid line.

  The seat portion 21 of the seat portion 2 is in a posture substantially parallel to the ground surface 500 at the use position. Moreover, the back part 22 of the seating part 2 becomes a posture slightly inclined backward in the use position. Thereby, it is possible to provide the user with a good sitting comfort. On the other hand, the seat part 21 and the back part 22 of the seat part 2 are inclined forward in the storage position. And since the back part 22 of the seating part 2 inclines forward, when a person passes the back of the rocking | swiveling accommodation type chair 1, the back part 22 does not prevent passage. Moreover, the seat part 21 inclined forward is stored under a desk (not shown) or the like. In addition, if the back part 22 inclines forward, you may comprise so that the seat part 21 in a storage position may become a substantially parallel attitude | position with the ground 500. FIG. In this case, the seat portion 21 is only slightly inclined forward.

  FIG. 4A is a schematic side view of the first leg portion 3, and FIG. 4B shows an AA cross section thereof. FIG. 5A is a schematic side view of the second leg portion 4, and FIG. 5B shows a BB cross section thereof. As shown in FIGS. 4B and 5B, the first leg 3 and the second leg 4 both have a U-shaped cross-sectional shape. And in the state which assembled the rocking | swiveling storage type chair 1, the 1st leg part 3 and the 2nd leg part 4 face each other, and the U-shaped opening parts face each other loosely.

  As shown in FIG. 4A, a pair of shaft holes 320 (first shaft holes) through which the lower first shaft 31 passes are provided in the lower portion of the first leg portion 3. A pair of shaft holes 340 (third shaft holes) through which the upper third shaft 32 penetrates are provided at the top of the first leg 3. A plate-like first restricting member 34 that abuts on the second restricting member 44 of the second leg 4 at the storage position and the use position is provided on the upper portion of the first leg 3. The first regulating member 34 is formed using a material such as a steel plate or an aluminum alloy. The first restricting member 34 is fixed to the inner surface of the first leg 3 by welding so as to straddle both sides of the first leg 3. In addition, a hole 35 is formed substantially at the center of the first restricting member 34. The first restricting member 34 can also be formed integrally with the first leg 3. Moreover, the 1st control member 34 formed independently can also be fixed to the inner surface of the 1st leg part 3 by methods, such as screwing.

  As shown in FIG. 5A, a pair of shaft holes 420 (second shaft holes) through which the lower second shaft 41 passes are provided in the lower portion of the second leg portion 4. A pair of shaft holes 440 (fourth shaft holes) through which the upper fourth shaft 42 penetrates are provided in the upper part of the second leg portion 4. Further, a pair of holding portions 45 for holding the second restricting member 44 shown in FIG. 5C is provided on the upper portion of the second leg portion 4. The holding part 45 is provided up and down so as to sandwich the second regulating member 44. Moreover, the holding | maintenance part 45 is provided in the both sides of the 2nd leg part 4 so that the space inside the 2nd leg part 4 which has a U-shaped cross-sectional shape may be pinched | interposed. Therefore, in the present embodiment, the holding portions 45 are provided at four locations on the inner surface of the second leg portion 4. Further, the holding portion 45 extends toward the space inside the second leg portion 4, and an engagement hole 451 is formed in any holding portion 45.

  The second regulating member 44 shown in FIG. 5C has a U-shaped cross-sectional shape. An engagement protrusion 443 is provided on the upper surface 441 and the lower surface 442 of the second restricting member 44. The engagement protrusion 443 is inserted into the engagement hole 451 of the holding portion 45. Thereby, the 2nd control member 44 is hold | maintained so that it may be pinched | interposed by the holding part 45 provided in the upper side of the 2nd leg part 4, and the holding part 45 provided in the lower side. Although only one second restricting member 44 is shown in FIG. 5C, in the present embodiment, two second restricting members 44 are used.

  As shown in FIG. 1, the lower surface of the first restricting member 34 contacts the lower inner surface 444 of the second restricting member 44 at the storage position. And the rocking | fluctuation to the front of the rocking | swiveling accommodation type chair 1 is controlled. On the other hand, in the use position, as shown in FIG. 2, the upper surface of the first restricting member 34 abuts on the upper inner surface 445 of the second restricting member 44. And the rocking | fluctuation to the back of the rocking | swiveling accommodation type chair 1 is controlled. Note that the second restricting member 44 is not limited to a configuration having a U-shaped cross-sectional shape, and a pair of restricting members having a plate shape can also be used. Such a pair of regulating members can be provided on the upper side and the lower side so as to face each other. In the storage position, the lower surface of the first regulating member 34 abuts on the upper surface of the lower regulating member. On the other hand, in the use position, the upper surface of the first regulating member 34 abuts on the lower surface of the upper regulating member.

  As described above, the first leg member 3 is provided with the first restricting member 34, and the second leg part 4 is provided with the second restricting member 44. The first restricting member 34 and the second restricting member 44 restrict the forward swinging operation from the use position toward the storage position and the backward swinging operation from the storage position toward the use position. To do. Therefore, the swinging of the swinging and retractable chair 1 can be restricted without forming the restricting part on the base part 5 and the bracket 6. Thereby, while being able to provide the rocking | swiveling accommodation type chair 1 of a simple structure, manufacturing cost can be made low.

[First Embodiment]
FIG. 6 is a schematic cross-sectional view showing a state in which a part of the first leg portion 3, the second leg portion 4, and the base portion 5 is cut in order to explain the shock absorber 7. FIG. 6 shows the first leg 3 and the second leg 4 as the first leg 3A and the second leg 4A, respectively, in the storage position, and the first leg 3C and the second leg in the use position. Shown as 4C. FIG. 6 shows the first leg 3 at the intermediate position as the first leg 3B.

  As the shock absorber 7 of the present invention, a gas damper, an oil damper, a coil damper, a rubber damper, a coil spring, rubber, or the like can be used. The shock absorber 7 is disposed between the first leg portion 3 and the second leg portion 4 while being accommodated in the shock absorber case 8. That is, the shock absorber 7 is fixed so as to straddle the lower first shaft 31 and the lower second shaft 41. In this example, two oil dampers are accommodated as the shock absorber 7. Thereby, even when one of the shock absorbers 7 does not function due to a failure, it is possible to absorb an impact when the seat portion 21 is accommodated by the other shock absorber 7. In addition, it is good also as a structure which accommodates the 1 or 3 or more buffering device 7. FIG.

Here, how the shock absorber 7 which is the oil damper of the present embodiment functions will be described with reference to FIG. The shock absorber 7 includes a rod 71, a tube 72 in which the rod 71 is inserted and a return spring (not shown) and oil are accommodated, and a piston (not shown) connected to the rod 71. An orifice is provided in the tube 72. When swinging from the use position toward the storage position, a force is applied to the rear end of the tube 72 and the rod 71 is pushed into the tube 72. When the rod 71 is pushed in this way, the oil moves in the tube 72 through the orifice, and at the same time, the return spring is deformed. In this way, the shock applied to the shock absorber 7 is absorbed, and the swing speed can be adjusted. On the other hand, when swinging from the storage position toward the use position, the tube 72 returns to the original position by the elastic force of the return spring.

  When the user stores the seating section 2, the swingable storage chair 1 in the use position is moved to the storage position toward the front indicated by the arrow 100. In this use position, the end of the shock absorber 7, that is, the end of the tube 72 is separated from the first leg 3C. Further, the end portion of the tube 72 is separated from the first leg portion 3C from the use position to the middle position. For this reason, the shock absorber 7 does not function, and the swingable chair 1 swings at a relatively high speed. Then, when the swingable storage chair 1 reaches the intermediate position of the swinging operation from the use position toward the storage position, the end of the tube 72 comes into contact with the first leg 3B. Thereafter, when the swingable chair 1 swings further forward, the rod 71 is pushed into the tube 72. Then, the shock absorber 7 functions, and the swingable storage chair 1 swings at a relatively slow speed. That is, while the swingable storage chair 1 swings from the intermediate position to the storage position, it swings at a relatively slow speed because force is applied to the end of the tube 72. Then, when the above-described first restriction member 34 comes into contact with the second restriction member 44, the forward swing of the swingable retractable chair 1 ends.

  On the other hand, when the user sits on the seating portion 2, the swingable retractable chair 1 in the storage position is moved rearward as indicated by an arrow 200 to the use position. At this time, the first leg 3 </ b> A moves in a direction away from the end of the tube 72 from the storage position to the use position through the intermediate position. Therefore, no force acts in the direction in which the end portion of the tube 72 is pushed in, and the shock absorber 7 does not function. Then, when the above-described first restriction member 34 comes into contact with the second restriction member 44, the backward swinging of the swingable retractable chair 1 ends.

  Thus, when the seating part 2 is swung from the use position to the storage position, it can be swung quickly at a high speed from the use position to the intermediate position. Thereby, when it is desired to secure a passage space for a person who passes through the rear side of the swingable storage chair 1, the seating portion 2 can be quickly swung. On the other hand, when the user stores the swinging and storing chair 1, the shock absorber 7 functions, so that the seat 2 can be swung slowly at a low speed from the intermediate position to the storing position. Therefore, the user can safely leave the seat 2. Moreover, thereby, the rocking and retractable chair 1 that eliminates the impact noise and is excellent in quietness can be provided. Furthermore, when the user swings the swingable storage chair 1 to the use position so that the user can sit on the seating portion 2, the shock absorber 7 does not function. As a result, the user can swing the swingable storage chair 1 with a small force, and can provide the swingable storage chair 1 with higher convenience.

  In order to explain the intermediate position of the present embodiment, FIG. 6 shows a line extending from the first leg portion 3B toward the placement surface by a dotted line. In the intermediate position, an angle 300 formed by the extended line and the mounting surface is 80 degrees to 100 degrees. More preferably, the angle 300 is 85 degrees to 95 degrees. In the present embodiment, the angle 400 between the second leg portion 4A in the storage position and the second leg portion 4C in the use position is 40 degrees.

  As shown in FIG. 6, the shock absorber 7 is accommodated in a shock absorber case 8. The shock absorber case 8 includes a front fitting groove 81 (first fitting groove) and a rear fitting groove 82 (second fitting groove). The shock absorber case 8 is attached to a position where the end of the shock absorber 7 is separated from the first leg 3C in the use position. The front fitting groove 81 has a substantially circular cross section and an inner diameter that substantially matches the diameter of the lower first shaft 31. The cross section of the rear fitting groove 82 is also substantially circular and has an inner diameter that substantially matches the diameter of the lower second shaft 41. When the shock absorber case 8 is attached, the lower first shaft 31 of the first leg 3 is fitted into the front fitting groove 81, and the lower second shaft 41 of the second leg 4 is placed on the rear side. It is fitted in the fitting groove 82. As a result, the shock absorber 7 is fixed so as to straddle the lower first shaft 31 of the first leg 3 and the lower second shaft 41 of the second leg 4.

  In this way, the shock absorber case 8 can be swung only by fitting the lower first shaft 31 into the front fitting groove 81 and fitting the lower second shaft 41 into the rear fitting groove 82. Attached to the retractable chair 1. Therefore, the shock absorber case 8 of the present invention can be easily attached and removed by hand without using a tool. As a result, the shock absorber 7 can be easily attached and the shock absorber 7 can be easily replaced. Furthermore, the first leg 3 and the second leg 4 do not need to be provided with a fixing member for fixing the shock absorber 7. Thereby, the structure of the swing-and-retractable chair 1 is simplified and can be manufactured at a lower cost. Further, as the shock absorber 7, a small shock absorber having a length that spans the lower first shaft 31 and the lower second shaft 41 can be used.

  FIG. 7 shows a state in which the shock absorber 7 of FIG. 6 is viewed from above. In FIG. 7, the shock absorber 7 is disposed inside a storage space 55 formed inside the base portion 5. The shock absorber 7 is fixed to the lower first shaft 31 of the first leg 3 and the lower second shaft 41 of the second leg 4. The base 5 is provided with three holes 50, and the base 5 is fixed to the placement surface by a fixing member such as a bolt inserted into the hole 50. The first leg 3 is connected to the rib 53 of the base 5 via the lower first shaft 31 that passes through the shaft hole 51 of the base 5. The second leg 4 is connected to the rib 53 of the base 5 via the lower second shaft 41 that passes through the shaft hole 52 of the base 5. The alternate long and short dash line indicates the center axis 310 of the lower first shaft 31 and the center axis 410 of the lower second shaft 41.

  A spring 9 is disposed as a biasing member between the shock absorber 7 and the second leg 4. The spring 9 biases the second leg portion 4 when swinging from the use position toward the storage position. Further, the lower second shaft 41 of the second leg portion 4 penetrates the inside of the spring 9. The shock absorber 7 accommodated in the shock absorber case 8 is disposed between the spring 9 and the inner surface of the second leg portion 4. Therefore, the shock absorber 7 can be positioned by the spring 9. Thereby, when rocking | swiveling accommodation type chair 1 is rock | fluctuated, it can prevent that the buffer device 7 moves to the extension direction of the lower side 2nd shaft 41. FIG. In addition to the spring, an elastic member such as rubber can be used as the biasing member.

  One end of the spring 9 is in contact with the lower first shaft 31 of the first leg 3. Further, the other end of the spring 9 is in contact with the inner surface of the second leg portion 4. Therefore, the user swings the swingable storage chair 1 against the biasing force of the spring 9 when swinging the swingable storage chair 1 from the storage position to the use position. On the other hand, when the swingable retractable chair 1 swings from the use position to the retracted position, the swingable retractable chair 1 swings due to the biasing force of the spring 9 and the weight of the swingable retractable chair 1. Then, between the intermediate position and the storage position, the end of the shock absorber 7 comes into contact with the inner surface of the first leg 3 and the shock absorber 7 functions. Therefore, the swinging and retractable chair 1 swings relatively quickly by the biasing force of the spring 9 from the use position to the front of the intermediate position. Thereby, the space behind the rocking and storing chair 1 can be secured quickly. Note that the other end of the spring 9 may be in contact with the inner surface of the first leg 3.

  FIG. 8 is a schematic view showing the shock absorber case 8. FIG. 8A is a schematic cross-sectional view of the shock absorber case 8 and shows a cross-section CC of FIG. 8B. FIG. 8B is a schematic side view of the shock absorber case 8. The shock absorber case 8 of the first embodiment has a symmetrical shape. FIG. 9A is a schematic rear view of the shock absorber case 8, and FIG. 9B is a schematic front view of the shock absorber case 8. In FIG. 8A, the shock absorber 7 to be inserted is virtually shown. Also, the alternate long and short dash line in the figure indicates the central axis 410 of the lower second shaft 41 and the central axis 310 of the lower first shaft 31.

  A front opening 83 and a front fitting groove 81 are provided in the front portion of the shock absorber case 8. The shock absorber 7 is inserted into the housing portion 86 of the shock absorber case 8 through the front opening 83. Further, a rear fitting groove 82 and a rear opening 85 are provided in the rear portion of the shock absorber case 8, and a rear rib 84 extending from the rear end portion of the accommodating portion 86 to the rear fitting groove 82. (First rib) is provided. The rear rib 84 is bifurcated in the vicinity of the rear end portion of the accommodating portion 86, and the respective leading ends are connected to the rear end portion of the accommodating portion 86.

  The lower first shaft 31 of the first leg 3 is fitted in the front fitting groove 81. Further, the lower first shaft 41 of the second leg portion 4 is fitted into the rear fitting groove 82. A groove 87 is formed in the rear fitting groove 82. The rear rib 84 is continuously formed from the rear end portion of the accommodating portion 86 to the upper end portion of the rear fitting groove 82. Thus, when the swingable chair 1 swings from the intermediate position to the storage position, the force applied to the shock absorber case 8 via the first leg 3 and the shock absorber 7 can be supported by the rear rib 84. it can. Therefore, damage to the shock absorber case 8 can be prevented, and the shock absorber case 8 having high durability can be provided.

  10 is a schematic cross-sectional view of the shock absorber case 8, FIG. 10A shows the DD cross section of FIG. 8, FIG. 10B shows the EE cross section of FIG. 8, and FIG. 10C shows the F cross section of FIG. -F shows a cross section.

  The shock absorber case 8 has side ribs 80 (second ribs) extending from the front fitting groove 81 to the rear fitting groove 82. As a result, when the swingable storage chair 1 swings from the intermediate position to the storage position, the force applied to the shock absorber case 8 via the first leg 3 and the shock absorber 7 is applied to the rear rib 84 and the side rib 80. Can be supported by. Therefore, damage to the shock absorber case 8 can be prevented, and the shock absorber case 8 having high durability can be provided. In the present embodiment, the side rib 80 extends from the front end portion of the housing portion 86 to the front fitting groove 81 and also extends to the rear end portion of the rear fitting groove 82. In addition, although the lower surface of the side rib 80 of a present Example has the curved shape, you may have a flat shape.

  As shown in FIG. 8A, the shock absorber 7 is inserted into the accommodating portion 86 from the front opening 83. The rod 71 of the shock absorber 7 is located on the back side of the accommodating portion 86. Further, the end portion of the tube 72 is exposed to the outside from the front opening 83. Thus, by arranging the rod 71 in the accommodating portion 86, foreign matter can be prevented from entering between the rod 71 and the tube 72. Therefore, it is possible to prevent the seal in the tube 72 from being broken by a foreign substance, and to prevent the occurrence of liquid leakage.

  As shown in FIGS. 9B, 10B, and 10C, an inner surface rib 89 is provided in the accommodating portion 86 of the shock absorber case 8. The inner rib 89 has a shape along the outer shape of the shock absorber 7 and has a curved surface in this embodiment. Thereby, the inner rib 89 functions as a guide part for guiding the shock absorber 7 and positions the shock absorber 7.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. For example, in the embodiment described above, the spring 9 is disposed between the first leg 3 and the second leg 4, but only the shock absorber 7 may be disposed. When arranged in this way, the shock absorber 7 cannot be positioned by the spring 9. However, even in this case, the shock absorber 7 functions only when the swingable storage chair 1 swings from the intermediate position to the storage position. For this reason, the swingable and retractable chair 1 deformed in this way also has the same effect as the above embodiment.

  In the above embodiment, the shock absorber 7 is fixed to the lower first shaft 31 of the first leg 3 and the lower second shaft 41 of the second leg 4. However, in the present invention, the shock absorber 7 may function between the intermediate position and the storage position, and the shock absorber 7 may not function before the use position and before the intermediate position. Therefore, the shock absorber 7 is fixed to the base 5, the first leg 3, the second leg 4, the upper third shaft 32 of the first leg 3, the upper fourth shaft 42 of the second leg 4, or the like. Also good.

  For example, the shock absorber 7 may be fixed to the inner surface of the swinging and retractable chair 1 with the rear leg portion as the second leg portion. In this case, the front leg portion of the swingable and retractable chair 1 becomes the first leg portion, and the end portion of the shock absorber 7 is separated from the inner surface of the front leg portion in the use position. Then, between the intermediate position and the storage position, the end of the shock absorber 7 contacts the inner surface of the front leg. Note that when the swinging and retractable chair 1 swings from the use position to the storage position, the distance between the front leg and the rear leg changes so as to gradually decrease. Therefore, the end portion of the shock absorber 7 that is separated from the front leg portion in the use position comes into contact with the front leg portion from the intermediate position to the storage position. The swingable and retractable chair 1 thus deformed also has the same effect as the above embodiment.

  Further, the shock absorber 7 may be fixed to the inner surface of the base portion 5. In this case, for example, the shock absorber 7 is disposed between the inner surface of the base 5 and the rear outer surface of the first leg 3. In the use position, the end of the shock absorber 7 is separated from the rear outer surface of the first leg 3, and the end of the shock absorber 7 is behind the first leg 3 between the intermediate position and the front of the storage position. Abuts the side outer surface. The swingable and retractable chair 1 thus deformed also has the same effect as the above embodiment.

  The present invention includes inventions that have been modified within the scope not departing from the present invention and inventions equivalent to the present invention. Moreover, each above-mentioned embodiment and modification can be suitably combined in the range which is not contrary to this invention.

  DESCRIPTION OF SYMBOLS 1: Swing storage type chair, 2: Seating part, 3: 1st leg part, 4: 2nd leg part, 5: Base part, 6: Bracket, 7: Shock absorber, 8: Shock absorber case, 9: Spring , 21: seat part, 22: back part, 31: first shaft, 32: third shaft, 34: first restriction member, 35: hole, 41: second shaft, 42: fourth shaft, 44: second restriction Member, 45: holding portion, 50: hole, 51: shaft hole, 52: shaft hole, 53: rib, 55: housing space, 71: rod, 72: tube, 80: second rib, 81: first fitting Groove, 82: second fitting groove, 83: front opening, 84: first rib, 85: rear opening, 86: housing portion, 87: groove, 89: inner rib, 100: front, 200: rear, 300: Angle, 310: center axis, 320: shaft hole, 330: center axis, 340: shaft hole, 400: angle, 410: center axis , 420: axial hole, 430: central axis, 440: axial hole, 441: upper surface, 442: lower surface, 443: engagement protrusion, 444: lower inner surface, 445: upper inner surface, 451: engagement hole, 500: ground , 600: Non-parallel four-bar link

Claims (15)

A swing-and-retractable chair comprising a seating portion and a base, and swingable between a use position for sitting on the seating portion and a storage position for storing the seating portion,
A first leg and a second leg connected to the seat and the base;
A shock absorber disposed between the first leg and the second leg;
A first shaft inserted into a first shaft hole provided at a lower portion of the first leg,
A second shaft inserted into a second shaft hole provided at a lower portion of the second leg,
A third shaft inserted into a third shaft hole provided in the upper part of the first leg,
A fourth shaft inserted into a fourth shaft hole provided in the upper part of the second leg, and
By making the distance between the first shaft and the second shaft shorter than the distance between the third shaft and the fourth shaft, the first to fourth shafts are non-parallel four-nodes. Configure the link
The end of the shock absorber is separated from the first leg at the use position, and abuts on the first leg at an intermediate position of the swinging operation from the use position toward the storage position. Swinging storage type chair.   The first leg portion is disposed on the rear side of the swinging and storing chair, the second leg portion is disposed on the front side of the swinging and storing chair, and the shock absorber includes the first shaft and the second shaft. The rocking and retractable chair according to claim 1, wherein the swingable and retractable chair is fixed so as to straddle.   3. The swingable storage chair according to claim 1, wherein an angle formed by a line extending from the first leg and the ground at the intermediate position is 80 degrees to 100 degrees.   A first restricting member is provided on the first leg portion to restrict a swinging operation from the use position toward the storage position and a swinging operation from the storage position toward the use position. The swing-retractable chair according to any one of claims 1 to 3, wherein a second restricting member is provided on the second leg portion. The first restricting member is provided on an upper portion of the first leg;
The second restricting member is provided on an upper portion of the second leg portion, and has a U-shaped cross-sectional shape,
In the storage position, the lower surface of the first restricting member abuts on the lower inner surface of the second restricting member,
5. The swingable retractable chair according to claim 4, wherein an upper surface of the first restricting member is in contact with an upper inner surface of the second restricting member at the use position. The end portion of the shock absorber is pushed in when swinging from the use position toward the storage position, and returns to the original position when swinging from the storage position toward the use position. The rocking and retractable chair according to any one of claims 1 to 5, characterized in that An urging member for urging the second leg portion when swinging from the use position toward the storage position;
The rocking and retractable chair according to any one of claims 1 to 6, wherein the urging member is provided between the shock absorber and the second leg portion.   The rocking and retractable chair according to any one of claims 1 to 7, wherein the shock absorber is housed in a shock absorber case.   9. The shock absorber case has a first fitting groove for fitting the first shaft and a second fitting groove for fitting the second shaft. The swing storage type chair described in 1.   10. The shock absorber case includes a housing portion for housing the shock absorber, and a first rib extending from an end portion of the housing portion to the second fitting groove. The swing storage type chair described in 1.   11. The swingable storage chair according to claim 9, wherein the shock absorber case includes a second rib extending from the first fitting groove to the second fitting groove. The shock absorber is a damper having a rod and a tube into which the rod is inserted,
12. The swing according to claim 8, wherein an end portion of the tube is exposed from the shock absorber case and abuts on the first leg portion at the intermediate position. Dynamic storage chair. A shock absorber case for housing a shock absorber disposed between the first leg portion and the second leg portion of the swing-housing chair,
An accommodating portion for accommodating the shock absorber;
A first fitting groove for fitting the first shaft of the first leg portion and a second fitting groove for fitting the second shaft of the second leg portion are provided. Case for shock absorber.   The shock absorber case according to claim 13, further comprising a first rib extending from an end of the housing portion to the second fitting groove.   The shock absorber case according to claim 13 or 14, further comprising a second rib extending from the first fitting groove to the second fitting groove.

Images