JP2011000275A - Furniture with training supporting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide furniture which improves a posture by properly supporting muscle training.SOLUTION: The furniture with a training supporting function includes: a self-standing furniture body C; a foot holding member 9 which is provided at the furniture body C, wherein a gap into which the feet of a user U can be inserted is formed between a floor surface and the foot holding member, to stably hold the feet of the user U; a weight receiving member 6 which is provided at the furniture body C, and receives a part or the whole of the weight of the body of the user U, to prevent the uplift of the furniture body C and the foot retention member 9. The user U of the furniture inserts the feet of the user just under the foot retention member 9 to stably hold the feet, and in such a state, performs a hip joint bending exercise of rotating the pelvis forward. Through daily hip joint bending exercise, the group of jip joint bending muscles are enhanced and ability of keeping a right posture of sitting straight is developed.

Description

  The present invention relates to furniture with a function for assisting strength training for correcting posture.

  Learning desks and chairs used by students in schools and other educational facilities are well known (see, for example, the following patent documents). This type of furniture is assigned one by one and often has a simple structure with consideration given to safety and durability for the convenience of mass supply.

  In recent years, it has been increasingly pointed out that children's attitudes have deteriorated. One reason for this is thought to be a decrease in the amount of exercise that accompanies indoor activities including play. Deteriorating posture places an extra burden on the skeleton, muscles, and internal organs and may adversely affect the body. It can be said that there is a growing demand for children to strengthen their muscle strength on a daily basis and to acquire the ability to maintain a correct posture for a certain period of time.

JP 2006-158940 A JP 2001-095643 A

  The present invention made in view of the above problem is to provide furniture that can assist muscle strength training and improve posture.

  In the present invention, a foot retaining member that retains the user's foot by forming a gap between the furniture body having the self-supporting property and the floor provided on the furniture body so that the user's foot can be inserted. And the furniture with a training assistance function which comprises the load receiving member which is provided in the furniture main body and receives a part or all of the user's body load and prevents the furniture main body and the foot retaining member from being lifted.

  Examples of muscles necessary for correcting the posture include the hip flexor muscle group such as the iliopsoas muscle (large psoas muscle, iliac muscle), rectus femoris muscle, and femoral fascia intestinal muscle. By rotating the pelvis forward through the contraction of these hip flexor muscles, in other words, by raising the pelvis, preparation for spinal extension is completed. The present invention assists training of such a hip flexor muscle group. That is, the user inserts his / her foot directly under the foot retaining member to retain the foot and performs a hip flexion motion in which the pelvis is rotated forward in this state.

  In particular, it is furniture used by a seated user, the foot retaining member is positioned in front of the load receiving member as viewed from the user, and the user's foot in a sitting posture is the foot retaining member and the floor surface. If it inserts in the gap | interval of this, the hip flexion exercise | movement in a chair sitting posture can be assisted suitably. In addition, it is possible to strengthen the hip flexor muscle group through daily hip flexion exercises and develop the ability to maintain a correct posture while sitting straight.

  The furniture body is, for example, furniture with a top plate such as a desk, a shelf, or a personal computer rack.

  If the load receiving member is in a position where it can be stepped on the user's foot, the instep of the foot can be put on the foot retaining member, and the hip joint bending motion can be performed while taking into account the load receiving member on the sole of the foot, which is highly convenient.

  If the load receiving member can be displaced in the front-rear direction, the position of the load receiving member can be adjusted according to the physique of the user or the front-rear size of the foot, which is suitable for use by growing students. Become.

  If the load receiving member can be removed from the furniture body, the load receiving member can be removed while training is not performed, and the space for placing the user's feet can be expanded. Further, it is possible to prevent the load receiving member from interfering with the chair leg or the like.

  Alternatively, the load receiving member is supported by the furniture main body so as to be rotatable around the front end side when viewed from the user, and is placed on the floor surface, and jumps forward from the use position. The same effect can be obtained even if the retracted position can be selected selectively.

  The present invention can also be applied to a chair. In that case, the seat which supports a user's buttocks plays a role as a load receiving member.

  If the foot retaining member can be displaced in the front-rear direction, the position of the foot retaining member can be adjusted in accordance with the user's physique, which is also suitable for use by children and students who are still growing. In addition, the foot retaining member can be retracted backward while training is not performed.

  A load receiving member that is detachable from the furniture main body and that receives a part or all of a user's body load attached to the furniture main body and prevents the furniture main body and the foot retaining member from being lifted; If comprised, this can be combined with a ready-made learning desk etc. and a training assistance function can be provided.

  Such a load receiving member, for example, engages from above the tread surface portion that is stepped on by the user's foot and the member that protrudes upward from the tread surface portion and serves as the foot retaining member provided in the furniture body. And an engaging portion.

  ADVANTAGE OF THE INVENTION According to this invention, the furniture which can assist muscle strength training suitably and can implement | achieve the improvement of a posture is implemented. Through daily hip flexion exercises using this furniture, it is possible to strengthen the hip flexor muscles and, in turn, develop the ability to maintain a correct posture while sitting straight.

The perspective view which shows the furniture with a top plate of one Embodiment of this invention. The side view of the furniture with the same top plate. The principal part disassembled perspective view of furniture with the same top plate. The sectional side view which shows the usage condition of the furniture with the same top plate. The sectional side view which shows the usage condition of the furniture with the same top plate. The perspective view which shows the furniture with a top plate of one Embodiment of this invention. The sectional side view of the furniture with the same top plate. The sectional side view of the furniture with the same top plate. The perspective view which shows the furniture with a top plate of one Embodiment of this invention. The sectional side view of the furniture with the same top plate. The disassembled perspective view of the furniture with the same top plate. The perspective view which shows the chair of one Embodiment of this invention. The side view of the chair. Side sectional drawing which shows the usage condition of the chair.

  Embodiments of the present invention will be described with reference to the drawings. For the sake of simplicity, the front direction when viewed from the user U of the furniture D and C is defined as the front.

  <First Embodiment> FIGS. 1 to 5 show a furniture D with a top plate according to an embodiment of the present invention. The furniture D with a top plate of the present embodiment is a learning desk used by children in schools and other educational facilities.

  The furniture D with a top plate is formed by supporting the shelf 3 and the top plate 1 on legs 2 that are paired on the left and right. The leg 2 is a metal member whose main components are a base 21 extending in the front-rear direction, leg struts 22 rising from the base 21, and a connecting frame 23 that connects the front ends of the left and right bases 21. . The leg column 22 has a telescopic structure in which the upper part 21 moves up and down with respect to the lower part 22 and can be expanded and contracted. On the outer side surface of the upper end portion of the leg column 22, a hook 223 on which a luggage can be put is provided.

  The shelf 3 is formed by forming a bottom plate 31, a front plate 32, and left and right side plates 33 by pressing a sheet metal material or the like, and includes an internal space opened upward and rearward. The shelf 3 is disposed between the inner side surfaces of the upper end portions of the left and right leg columns 22.

  The top plate 1 is a rubber plywood member with a melamine decorative board. The top plate 1 is placed on and fixed to the upper ends of the leg posts 22 and the front plate 32 and the side plate 33 of the shelf 3. The top plate 1 closes the internal space of the shelf 3 from above.

  Thus, the foot retaining member 4 and the load receiving member 5 are attached to the furniture D with a top board, and the function of assisting the training of the hip flexor muscle group is given.

  The foot retaining member 4 plays a role of restraining the user U's foot from above during training. The foot retaining member 4 is in a state of floating from the floor surface, and forms a gap in which the user U's foot can be inserted between the foot retaining member 4 and the floor surface. The foot retaining member 4 has a round pipe shape (or a round bar shape) extending in the left-right direction, and includes mounting brackets 41 at both left and right ends thereof. The mounting bracket 41 is a thin plate body facing in the left-right direction so as to be orthogonal to the round pipe (round bar).

  The load receiving member 5 receives a part or all of the body load of the user U and plays a role of preventing the furniture body D and the foot retaining member 4 from being lifted during training. In the present embodiment, the load receiving member 5 is stepped on by the user's U foot inserted into the gap between the foot retaining member 4 and the floor surface. That is, the load receiving member 5 is disposed at a position lower than the foot retaining member 4 (particularly near the floor surface) and behind the foot retaining member 4. Similarly to the foot retaining member 4, the load receiving member 5 also has a round pipe shape extending in the left-right direction, and includes mounting brackets 51 at the left and right ends thereof.

  On the other hand, the support bracket 24 for joining and supporting the mounting brackets 41 and 51 is provided on the leg 2 of the furniture D with a top plate. The support bracket 24 is a thin plate body facing in the left-right direction, and extends back and forth along the base 21. The support bracket 24 is fixed to the inner surfaces of the left and right bases 21 by welding or the like. The distance between the left and right support brackets 24 is substantially equal to the distance between the outer surfaces of the left and right mounting brackets 41 and 51.

  In attaching the foot retaining member 4 and the load receiving member 5, the outer surfaces of the mounting brackets 41 and 51 are brought into contact with the inner surface of the support bracket 24, and the mounting brackets 41 and 51 and the support bracket 24 are tightened. Crimp with 26 and 27. The fastening material is, for example, a set of a bolt 26 and a nut (cap nut) 27.

  As shown in FIG. 3 and the like, the mounting brackets 41 and 51 are intermittently provided with a plurality of insertion holes 42 and 52 through which the bolts 26 are inserted in the front-rear direction. The insertion holes 42 and 52 of the left and right mounting brackets 41 and 51 are positioned symmetrically.

  The support bracket 24 is intermittently provided with a number of elongated holes 25 extending vertically so as to insert the bolts 26 in the front-rear direction. The long holes 25 of the left and right support brackets 24 are also positioned symmetrically. The reason why the elongated hole 25 is expanded vertically is to make it possible to adjust the mounting height positions of the foot retaining member 4 and the load receiving member 5. Further, the long hole 25 is slightly inclined forward from the vertical direction. When the long hole 25 is inclined in this manner, when the fastening between the bolt 26 and the nut 27 is slightly loosened, the foot retaining member 4 that receives the action of the external force from the user U's foot moves upward and is displaced. Can be prevented.

  The pitch in the front-rear direction of the plurality of insertion holes 42, 52 formed in the mounting brackets 41, 51 is an integral multiple of the pitch in the front-rear direction of the plurality of long holes 25 formed in the support bracket 24. Contrary to the illustrated example, the attachment brackets 41 and 51 may be provided with inclined long holes and the support bracket 24 may be provided with an insertion hole.

  The mounting brackets 41, 51 are brought into contact with the support bracket 24 so that the insertion holes 41, 51 overlap with the long holes 25 in a side view, and bolts 26 are inserted into the insertion holes 42, 52 and the long holes 25. The mounting brackets 41 and 51 and the support bracket 24 can be pressure-bonded by screwing and tightening the nut 27 to the shaft portion. Thereby, the foot retaining member 4 and the load receiving member 5 can be fixed to the leg 2. If the foot retaining member 4 or the load receiving member 5 is to be removed from the leg 2, the nut 27 may be removed from the bolt 26 and then the bolt 26 may be extracted from the insertion holes 42 and 52 and the long hole 25.

  Since the number of holes 25 on the support bracket 24 side is larger than the number of holes 42 and 52 on the mounting brackets 41 and 51, the mounting positions of the foot retaining member 4 and the load receiving member 5 can be displaced in the front-rear direction. it can. In addition, as described above, since the long hole 25 extends in the vertical direction, the fastening position of the bolt 26 can be displaced in the vertical direction. That is, the attachment positions of the foot retaining member 4 and the load receiving member 5 can be displaced in the vertical direction.

  At the time of training the hip flexor muscle group, as shown in FIG. 4, the user U inserts his / her foot directly under the foot retaining member 4 while sitting on a chair or the like and simultaneously places the foot on the load receiving member 5. . Then, a hip flexion exercise is performed to rotate the pelvis forward.

  Incidentally, as shown in FIG. 5, it is also possible to perform a body raising (sit-up) exercise that raises the upper body from a posture that is supine on the floor. If the top plate 1 or the like gets in the way of raising the body, the leg strut upper portion 221 may be detached from the leg strut lower portion 222 and the leg strut upper portion 221, the shelf 3 and the top plate 1 may be removed.

  According to the present embodiment, the gap between the furniture main body D having the self-supporting property and the floor of the furniture main body D through which the user U's feet can be inserted is formed. A foot retaining member 4 that retains the foot, and a load receiving member 5 that is provided on the furniture body D and receives part or all of the body load of the user U to prevent the furniture body D and the foot retaining member 4 from being lifted. Since the furniture with the training assist function is configured, the user U inserts his / her foot into the gap immediately below the foot retaining member 4 to retain the foot, and the pelvis rotates forward with the lower body stabilized. It can be performed.

  It is furniture used by the user U who is seated, the foot retaining member 4 is positioned forward of the load receiving member 5 as viewed from the user U, and the foot of the user U in the sitting posture is the foot retaining member 4 Therefore, it is possible to suitably assist the hip flexion movement in the chair sitting posture. In addition, it is possible to strengthen the hip flexor muscle group through daily hip flexion exercises and develop the ability to maintain a correct posture while sitting straight.

  Since the furniture main body is the furniture D with a top plate, it can be effectively used as furniture even during non-training, and it is possible to perform hip flexion exercises in a chair-sitting posture from the usual times.

  Since the load receiving member 5 is in a position where it can be stepped on the foot of the user U, the instep of the foot can be applied to the foot retaining member 4 and the hip flexion motion can be performed while taking into account the load receiving member 5 on the sole of the foot. High nature.

  The foot retaining member 4 and the load receiving member 5 can be displaced in the front-rear direction, and the positions of these members 4, 5 can be adjusted according to the physique of the user U or the front-rear size of the foot.

  In addition, the foot retaining member 4 and the load receiving member 5 can be displaced in the vertical direction, and the positions of the members 4 and 5 can be adjusted according to the vertical thickness of the foot. Therefore, it is suitable for use by growing students.

  Since it is possible to remove the load receiving member 5 from the furniture body D, it is possible to remove the load receiving member 5 while training is not performed, thereby expanding the space for placing the user's U feet. It is also possible to avoid the load receiving member 5 from interfering with a chair leg or the like.

  <Second Embodiment> In the second embodiment shown in FIGS. 6 to 8, the shape of the load receiving member 5 and the structure of assembling the load receiving member 3 to the leg 2 are changed. The following description focuses on the differences from the first embodiment.

  In the present embodiment, the foot retaining member 4 has both left and right ends connected and fixed to the inner surface of the lower end portion of the leg support 22 by welding or the like. The foot retaining member 4 is floating from the floor surface. The foot retaining member 4 also functions as a connecting frame that connects the left and right leg columns 22.

  The load receiving member 5 is a plate-like body extended in the front-rear and left-right directions. Side walls 53 stand up from the left and right side edges of the load receiving member 5, and a bearing 54 having a shaft hole opened in the left and right direction is provided at the front end of each side wall 53 so as to protrude upward. The bearings 54 are separated from each other to form a pair. The load receiving member 5 is supported by the leg support 22 via the foot retaining member 4 in such a manner that the foot retaining member 4 is inserted into the shaft hole of the bearing 54. The load receiving member 5 can be rotated back and forth around the axis of the foot retaining member 4 around the front end side where the bearing 54 is located.

  At the time of training the hip flexor muscle group, the user U rotates the load receiving member 5 backward and places it on the floor as shown in FIG. The load receiving member 5 in the use position of FIG. 7 is located at a lower position than the foot retaining member 4 and is located behind the foot retaining member 4. Then, the user U puts his / her foot directly under the foot retaining member 4 and places the foot on the load receiving member 5 to perform a hip joint bending motion for rotating the pelvis forward.

  While training is not performed, as shown in FIG. 8, the load receiving member 5 is rotated forward to retract from the lower limb space of the furniture D with the top plate. By positioning the load receiving member 5 in the retracted position of FIG. 8, it is possible to avoid the inconvenience that the load receiving member 5 interferes with the user U's foot, the chair leg 2 or the like.

  According to the present embodiment, the load receiving member 5 is supported by the furniture body D so as to be rotatable around the front end side when viewed from the user U, and is used on the floor surface, Since it is configured to be able to selectively take the retracted position flipped forward from the use position, the load receiving member 5 is retracted to the retracted position and the space for placing the user's U foot can be expanded while training is not performed. Can do. Further, the load receiving member 5 can be prevented from interfering with the leg 2 of the chair.

  In addition, it goes without saying that the effects described in the first embodiment can be achieved.

  <Third Embodiment> In the third embodiment shown in FIGS. 9 to 11, the load receiving member 5 is detachably attached to the leg 2. FIG. The following description focuses on differences from the second embodiment.

  In the present embodiment, the load receiving member 5 includes a plate-shaped tread surface portion 55 that extends in the front, rear, left, and right directions, and an engagement portion 57 that protrudes upward from the tread surface portion 55 and engages with the foot retaining member 4 from above. Prepare. The engaging portion 57 is provided at the front end portion of the side wall 56 erected from the left and right side edges of the tread surface portion 55, and forms a pair separated from the left and right. The engaging portion 57 is formed with an opening 571 that is open at the front edge and is cut away from the front to the rear.

  When training the hip flexor muscle group, as shown in FIG. 10, the user U inserts the foot retaining member 4 into the opening 571 and holds the engaging portion 57 around the outer periphery of the foot retaining member 4. Engage with. The tread surface portion 55 of the load receiving member 5 is placed on the floor, and is located at a lower position than the foot retaining member 4 and behind the foot retaining member 4. Then, the user U puts his / her foot directly under the foot retaining member 4 and places the foot on the load receiving member 5 to perform a hip joint bending motion for rotating the pelvis forward.

  While training is not performed, the foot retaining member 4 is extracted from the opening of the engaging portion 57 and the load receiving member 5 is removed. Then, the lower limb space of the furniture D with the top plate is released, and the inconvenience that the load receiving member 5 interferes with the user U's foot, the chair leg 2 and the like can be avoided.

  According to the present embodiment, the load receiving member 5 is detachable from the furniture main body, and receives a part or all of the body load of the user U while being attached to the furniture main body D. Since the foot retaining member 4 is prevented from lifting, it can be removed while training is not performed, and the space for placing the user's U foot can be expanded. Further, the load receiving member 5 can be prevented from interfering with the leg 2 of the chair.

  The load receiving member 5 is engaged from above with a tread surface portion 55 that can be stepped on by the user U's foot, and a member that protrudes upward from the tread surface portion 55 and becomes the foot retaining member 4 provided on the furniture body D. The engaging part 57 to be provided. Such a load receiving member 5 has a member 4 (typically, a frame, a pipe or the like that extends in the left-right direction and interconnects the left and right legs 2) fixed in a state of floating from the floor surface. When combined with an off-the-shelf learning desk or the like, a training assistance function can be added to the learning desk or the like later.

  In addition, it goes without saying that the effects described in the first embodiment can be achieved.

  <Fourth Embodiment> FIGS. 12 to 14 show a chair C according to an embodiment of the present invention. The chair C of this embodiment is a chair used by a student in a school or other educational facility.

  The chair C is formed by supporting a seat 6 and a backrest 8 on legs 7 that are paired on the left and right. The leg 7 is a metal member whose main components are a base 71 extending in the front-rear direction, a leg column 72 rising from the base 71, and a connecting frame 73 that connects the lower ends of the left and right leg columns 72. is there. The leg strut 72 has a telescopic structure in which the upper portion 721 moves up and down with respect to the lower portion 722 and can be expanded and contracted.

  A back support rod 81 also serving as a seat receiver 61 is fixed to the upper end of the leg support 72. The back support rod 81 is formed by bending a metal pipe material (or bar material) into a substantially square shape when viewed from the back, and is provided with a seat 61 that continuously extends forward from the lower end thereof. The left and right seat receivers 61 are connected by a horizontal member 62 extending in the left-right direction.

  The seat 6 and the backrest 8 are synthetic resin members produced by injection molding.

  In this embodiment, the seat 6 is a load receiving member that receives the body load of the user U. The chair C is separately provided with a foot retaining member 9 to provide a function of assisting training of the hip flexor muscle group.

  The foot retaining member 9 is located in front of the seat 6 and below the seated user U. The foot retaining member 9 has a round pipe shape (or a round bar shape) extending in the left-right direction, and includes support frames 91 at both left and right ends thereof. The support frame 91 extends in the front-rear direction and curves upward at the front end. The foot retaining member 9 is connected and fixed to the front end of the support frame 91. The support frame 91 supports the foot retaining member 9 in a state of floating from the floor surface.

  As shown in FIGS. 13 and 14, the foot retaining member 9 and the support frame 91 can be displaced in the front-rear direction. In the present embodiment, a telescopic structure is constructed by the support frame 91 and the base 71, and the foot retaining member 9 is moved forward by pulling out the support frame 91 from the inside of the cylindrical base 71. The foot retaining member 9 can be moved backward by pushing in the support frame 91. It is also possible to remove the foot retaining member 9 by completely extracting the support frame 91 from the base 71.

  At the time of training the hip flexor muscle group, the user U sits with the buttocks on the seat 6 as shown in FIG. 14 and inserts his / her foot directly under the foot retaining member 9. Then, a hip flexion exercise is performed to rotate the pelvis forward.

  According to the present embodiment, the gap between the furniture body C having a self-supporting property and the floor provided on the furniture body C in which the user U's feet can be inserted is formed. A foot retaining member 9 that retains the foot and a load receiving member 6 that is provided on the furniture body C and that receives part or all of the body load of the user U and prevents the furniture body C and the foot retaining member 9 from being lifted up. Since the furniture with the training assist function is configured, the user U inserts his / her foot into the gap immediately below the foot retaining member 9 to retain the foot, and the pelvis is rotated forward while the lower body is stabilized. It can be performed.

  It is furniture used by the user U who is seated, the foot retaining member 9 is positioned in front of the load receiving member 6 as viewed from the user U, and the foot of the user U in the sitting posture is the foot retaining member 9 Therefore, it is possible to suitably assist the hip flexion movement in the chair sitting posture. In addition, it is possible to strengthen the hip flexor muscle group through daily hip flexion exercises and develop the ability to maintain a correct posture while sitting straight.

  Since the furniture body C is a chair, it can be effectively used as furniture even during non-training, and it is possible to perform hip flexion exercises in a chair-sitting posture from the usual time.

  The foot retaining member 9 can be displaced in the front-rear direction, and the position of the member 9 can be adjusted according to the physique of the user U or the front-rear size of the foot.

  In addition, the load receiving member 6 can be displaced in the vertical direction, and the position of the member 6 can be adjusted according to the body of the user U. Therefore, it is suitable for use by growing students.

  Since the foot retaining member 9 can be removed from the furniture main body C, it can be removed while training is not performed, and the space for placing the user's U foot can be expanded. It is also possible to prevent the foot retaining member 9 from interfering with a desk leg or the like.

  The present invention is not limited to the embodiment described in detail above. The specific configuration of each part can be variously modified without departing from the spirit of the present invention. In particular, the function of the furniture body is not limited to a desk or chair.

  The present invention can be used, for example, as a learning desk or chair for children in schools and other educational facilities.

D ... Furniture body (furniture with top plate)
4 ... Foot retaining member 5 ... Load receiving member C ... Furniture body (chair)
6 ... Load receiving member (seat)
9 ... A foot retaining member

Claims (11)

A furniture body with independence;
A foot retaining member that retains the user's foot by forming a gap between the floor surface of the furniture body and the user's foot that can be inserted;
A furniture with a training assisting function provided with a load receiving member provided on the furniture main body and receiving a part or all of a user's physical load to prevent the furniture main body and the foot retaining member from being lifted. Used by seated users,
The furniture according to claim 1, wherein the foot retaining member is positioned in front of the load receiving member as viewed from the user, and the user's foot in a sitting posture is inserted into a gap between the foot retaining member and the floor surface. The furniture according to claim 1 or 2, wherein the furniture body is furniture with a top board. The furniture according to claim 1, 2 or 3, wherein the load receiving member is in a position to be stepped on a user's foot. The furniture according to claim 1, 2, 3, or 4, wherein the load receiving member can be displaced in the front-rear direction. The furniture according to claim 1, 2, 3, 4, or 5, wherein the load receiving member can be detached from the furniture body. The load receiving member is supported by the furniture main body so as to be rotatable about the front end side when viewed from the user, and is used to be placed on the floor surface and to be flipped forward from the use position. The furniture according to claim 1, 2, 3, 4 or 5, wherein the retracted position can be selectively taken. The furniture according to claim 1, wherein the load receiving member is a seat that supports a user's buttocks. The furniture according to claim 1, 2, 3, 4, 5, 6 or 8, wherein the foot retaining member can be displaced in the front-rear direction. It is used for constituting the furniture according to claim 6,
A load receiving member that is detachable from the furniture body and receives a part or all of a user's body load while attached to the furniture body to prevent the furniture body and the foot retaining member from being lifted. A tread part that can be stepped on by the user's foot;
The load receiving member according to claim 10, further comprising an engaging portion that protrudes upward from the tread surface portion and engages with a member that serves as the foot retaining member provided on the furniture body from above.

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