JP3586986B2 - Chair Seat Slide Device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat-plate sliding device for a chair, and more particularly, to a seat-plate sliding device capable of sliding a seat plate forward against an elastic urging force in accordance with a movement of a seated person to a reclining position and allowing the seated person to move to a standing position. The present invention relates to a seat plate sliding device for a chair which can be slid rearward by an elastic urging force with the movement.
[0002]
[Prior art]
Conventionally, a tubular casing provided on both sides of a seat plate is externally slidably inserted and retracted outwardly into seat support portions of both side frames attached to legs, and elastically attached rearward into the seat support portions of the frame. The front end of the slide rod that protrudes from the front end of the seat support portion is engaged with the seat plate, and the seat plate is moved against the elastic urging force as the occupant moves to the reclining position. A chair seat plate sliding device which is slidable forward and slidable backward by an elastic urging force in accordance with the movement of a seated person to an upright posture is provided by the present applicant under the trade name "vertebra". This mechanism is common to all chairs and is known.
[0003]
In a conventional seat plate slide device, as disclosed in Japanese Patent Publication No. 61-2364, a slide rod and a spring for elastically urging the slide rod rearward into a seat support portion of a frame made of a metal pipe. With the slide restoring mechanism such as a tension coil spring installed inside, after the casing of the seat plate is externally inserted into the seat support from the front (the insertion direction matches the slide direction), the tip of the slide rod is removed. It was made to appear in front of the casing, and the tip and the seat plate were fixed in place.
[0004]
However, the conventional fixing of the distal end portion of the slide rod and the seat plate has the following problem because the knock pin is directly driven into the distal end portion from the back surface side of the seat plate. That is, the workability is poor because it is assembled from below, the gravity acts in the direction in which the pin comes off, the pin fixing force depends on the fitting force, so there is concern about detachment due to dimensional variations, etc. The fact that they cannot be visually confirmed, the necessity of a tool for tapping into the mounting of the pin, and the necessity of a screw and pliers for removing the pin are required.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of the above situation, the present invention is to solve the problem that the assembling work between the distal end portion of the slide rod and the seat plate can be easily performed with one touch from above, and the assembling process can be simplified. Another object of the present invention is to provide a seat plate sliding device for a chair having a high binding strength.
[0006]
[Means for Solving the Problems]
The present invention provides, in order to solve the above-mentioned problem, a method in which a tubular casing provided on both sides of a seat plate is externally slidably forward and backward slidably mounted on seat support portions of both side frames attached to legs. A slide rod elastically urged rearward is mounted inside the seat support portion of the frame, and the tip end of the slide rod projecting from the front end of the seat support portion is engaged with the seat plate, and as the occupant moves to the reclining posture. A seat plate sliding device for a chair in which a seat plate can slide forward against an elastic urging force and can be slid rearward by an elastic urging force in accordance with the movement of a seated person to an upright posture, outer seat plate was formed the casing - a structure fitted to the inner shell in the polymerised state on the shell, thereby forming an engagement portion on the distal end of said slide rod, against the engagement portion In a state in which the locking portion is formed in the outer shell, the coefficient in the engagement portion of the engaging member from above perpendicular to the sliding direction engage and engagement swing fittings and locking with the locking portion of the the engaging member is configured to seat plate sliding device of this stop was formed by chair pressing rib projecting from the lower surface of the inner shell.
[0007]
Here, the engaging portion of the slide rod has a through hole formed at the distal end portion of a substantially rectangular parallelepiped, the locking portion is an insertion hole having substantially the same shape as the through hole, and the engaging member is a central portion. A locking bar that can be simultaneously inserted into the through-hole and the insertion hole, and a resilient piece that is fitted on both sides of the locking bar and that has a distal end portion of the slide rod to prevent the slide rod from slipping out. Most preferably.
[0008]
The seat plate has a structure in which an inner shell having a cushion body mounted on an upper surface thereof is fitted on an outer shell in a superposed state, and the locking portion is provided at a front open end of the casing on the upper surface side of the outer shell. It is a box-type which is integrally formed on the front side, has a rear standing wall and a front wall standing at a predetermined interval and has a front standing wall standing upright, and engages an engaging member from above with an engaging portion of the slide rod. Further, it is also preferable to be locked by a locking portion below the same.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a more detailed description will be given based on the embodiment of the present invention shown in the accompanying drawings. FIG. 1 is an overall perspective view of a chair according to the present invention, FIG. 2 shows a structure of a seat plate portion of the chair according to the present invention, FIG. 3 shows a state during assembly, and FIG. 4 shows a main part of the present invention. In the drawings, 1 is a seat plate, 2 is a mounting body, 3 is a frame, and 4 is a slide restoring mechanism.
[0010]
In the chair according to the present invention, as shown in FIG. 1, a backrest is supported on a seat B supported by a leg A via backrest support rods C1 and C1 which are covered with bellows rising upward from both sides thereof. The backrest C is attached, and the seat B can be slid forward and backward, and the backrest C can be tilted back and forth.
[0011]
More specifically, the chair according to the present invention supports the seat plate 1 so as to be slidable back and forth on a frame 3 mounted on both sides of a mounting body 2 connected to the leg A in the front-rear direction. A slide restoring mechanism 4 for elastically urging the seat plate 1 rearward is provided in the frame 3 made of a pipe. Here, the seat portion B is a concept including the seat plate 1 and the mounting body 2. A backrest portion C is provided on the rear rising portion of the frame, that is, on the backrest supporting rods C1 and C1 which are covered with bellows, so that the backrest portion C can be tilted back and forth and vertically slidable.
[0012]
According to the present invention, tubular casings 6, 6 provided on both sides of a seat plate 1 and penetrating in the front-rear direction are externally slidably inserted into seat support portions 5, 5 of both side frames 3, 3 attached to legs. A slide rod 7 elastically urged rearward is housed in the seat support portion 5 of the frame 3 and a distal end portion 8 of the slide rod 7 protruding from the front end of the seat support portion 5 is engaged with the seat plate 1 to seat the seat. As the occupant moves to the reclining position, the seat plate 1 can be slid forward against the elastic urging force, and can be slid backward by the elastic urging force as the occupant moves to the upright posture. A seat plate sliding device for a chair, wherein an engaging portion 9 is formed on a distal end portion 8 of the slide rod 7 and a locking portion 10 is formed on a seat plate 1 corresponding to the engaging portion 9. A direction perpendicular to the sliding direction of the joint 9 The engage and engagement swing fittings 11 et engagement Chakugu 11 are summarized as to become engaged with the locking portion 10.
[0013]
The seat plate 1 in the present embodiment has a structure in which an inner shell 13 with a cushion body 12 attached to the front surface side is fitted in an outer shell 14 that covers the inner shell 13 in a superposed state. Here, the inner shell 13 and the outer shell 14 are both integrally formed of synthetic resin, and the casing 6 is formed so as to protrude from both upper surfaces of the outer shell 14.
[0014]
More specifically, the main parts of the present invention will be described with reference to FIGS. The engaging portion 9 of the slide rod 7 has a through hole 15 formed at the distal end portion 8 of a substantially rectangular parallelepiped, and the locking portion 10 is an insertion hole 16 having substantially the same shape as the through hole 15. The tool 11 has a locking rod 17 at the center thereof which can be simultaneously inserted into the through hole 15 and the insertion hole 16, and withdraws the distal end 8 of the slide rod 7 at intervals on both sides of the locking rod 17. It is a chevron shape having elastic pieces 18 and 18 to be fitted to the stopper.
[0015]
Here, the locking portion 10 is integrally formed on the upper surface side of the outer shell 14, and the rear standing wall 19 and the rear standing wall 19 are positioned at a position slightly forward of the front open end of the casing 6. A front wall 20 is erected at a predetermined interval in front of the front wall 20, and furthermore, a side wall 21, 21 between the rear wall 19 and the front wall 20 is continuously opened by the side vertical walls 21, thereby forming a box-shaped upper opening. A notch opening 22 through which the tip 8 of the slide rod 7 passes is formed at a central upper portion higher than the upright wall 20, and a pair of partition walls 23, between the rear upright wall 19 and the front upright wall 20 facing the notch opening 22. 23 is formed, and the space between the two partition walls 23 is formed as the insertion hole 16. Further, the upper ends of the partition walls 23, 23 are formed as guide edges 23A inclined from the rear to the front, and when the seat support portion 5 of the frame 3 is inserted from the rear of the casing 6 to a predetermined position, the seat support portion is formed. The distal end 8 of the slide rod 7 protruding from the distal end of the slide rod 5 passes through the cutout opening 22 and slides on the guide edge 23A, thereby reliably guiding the through hole 15 to a position where it matches the insertion hole 16. Eventually, the distal end 8 of the slide rod 7 is located at a position higher than the front wall 20. As described above, the insertion hole 16 as the locking portion 10 is firmly formed by the upright wall.
[0016]
Further, a flange portion 24 protrudes from the distal end portion 8 of the slide rod 7 on the base end side thereof, and the flange portion 24 comes into contact with the peripheral portion of the cutout opening 22 of the rear standing wall 19. I have. Further, both ends of the distal end portion 8 are chamfered so that the operation of inserting the distal end portion 8 into the notch opening 22 can be performed smoothly.
[0017]
As described above, the engaging member 11 has the locking bar 17 at the center and the elastic pieces 18 and 18 on both sides thereof extending in the same direction from the connecting plate 25, and has a chevron shape as a whole. . Further, a claw portion 26 is provided at a position on the distal end of the elastic piece 18 facing the locking rod 17 so as to prevent the slide rod 7 from slipping out when the distal end portion 8 of the slide rod 7 is fitted. ing.
[0018]
Next, the slide restoration mechanism 4 will be described. The slide restoring mechanism 4 is provided with the slide rod 7 slidably provided in the front half of a tubular supporter 27 provided inside the seat support 5 of the frame 3, and one end of the slide rod 7 is provided in the rear half of the supporter 27. 7 and a tension coil spring 28 having the other end locked to the rear end of the supporter 27. The supporter 27 is disposed in contact with a cap 29 screwed and fixed to the front end of the seat support portion 5 in a threaded state. The cap 29 has a through hole 30 through which the slide rod 7 is inserted. Have been. A circular slider 31 that slides inside the front half of the tubular supporter 27 is fitted to the front-rear intermediate portion of the slide rod 7, and a rubber washer 32 that is externally fitted to the front portion of the slide rod 7 is attached to the slide rod 7. The cap 29 is provided along the rear surface side. Further, a rubber washer 33 externally fitted to the slide rod 7 is interposed between the flange portion 24 of the slide rod 7 protruding forward of the cap 29 and the cap 29.
[0019]
As in the present embodiment, the seat plate 1 has a structure in which an inner shell 13 having a cushion body 12 mounted on an upper surface thereof is fitted on an outer shell 14 in a superposed state, and the casing 6 and the locking portion 10 are connected to the outer shell 14. When formed on the shell 14 and set so that the locking portion 10 is located below the tip 8 of the slide rod 7, the slide restoring mechanism 4 is first incorporated into the casings 6, 6 of the outer shell 14 in the assembling process. After the seat support portions 5 and 5 of the frames 3 and 3 are inserted from behind, the engaging member 11 is engaged with the engaging portion 9 of the slide rod 7 from above, and is locked by the locking portion 10 below the engaging portion 9. The seat plate 1 can be assembled by fitting and attaching the inner shell 13 to the upper surface side of the outer shell 14. In particular, the engaging device 11 can be fitted from above the outer shell 14 where the work is easy, and the engaging state of the distal end portion 8 of the slide rod 7 can be visually confirmed. Further, when the fastening tool 11 is abutted by the holding ribs 34 protruding from the lower surface of the inner shell 13 in a state where the inner shell 13 is fitted to the outer shell 14, the removal of the fastening tool 11 is more reliably prevented. it can.
[0020]
Next, a second embodiment will be described with reference to FIGS. In this embodiment, the basic structure is the same as that of the above-described embodiment, and the description of the common parts will be omitted. The distal end portion 8 of the slide rod 7 has a T-shape in a plan view in which both sides are cut off to the flange portion 24 except for the distal end. Similarly, the locking portion 10 is formed in a box shape by the rear wall 19, the front wall 20 and the both side walls 21 and 21, and a single partition wall 23 is provided at the center thereof, and both sides of the partition wall 23 are provided. Are the insertion holes 36, 36 formed in the holes. Of course, the locking portion 10 includes the rear wall 19. The fastening tool 11 has engagement legs 38, 38 formed on both sides of the lower surface of the connecting plate 37, and a slit 39 between which the constricted portion 35 of the locking portion 10 can be fitted.
[0021]
Also in this case, when the seat support portion 5 is inserted into the casing 6 of the outer shell 14, the front end 8 of the slide rod 7 is positioned above the partition wall 23 from the notch opening 22, and is engaged from above. The engagement legs 38 of the attachment 11 are fitted to a constricted portion 35 serving as the engagement portion 9 to clamp the constricted portion 35 in the slit 39, and the engagement legs 38, 38 are inserted into the respective insertion holes 36. , 36 and locked to the rear standing wall 19. In this case as well, the inner shell 13 is fitted to the outer shell 14, and a retaining rib 34 protruding from the inner shell 13 prevents the fastening tool 11 from being removed.
[0022]
A third embodiment will be described with reference to FIGS. In this embodiment, the basic structure is the same as that of the above-described embodiment, and the description of the common parts will be omitted. The shape of the distal end portion 8 of the slide rod 7 is such that a pair of engaging claws 40 are formed at a predetermined interval from the flange portion 24, and each engaging claw 40 has an outwardly protruding engaging step. A portion 41 is formed, and protruding edges 42, 42 are formed inside the tips of the engaging claws 40, 40 in a direction approaching each other. The locking portion 10 is formed in a box shape on the upper surface of the outer shell 14 by the rear wall 19, the front wall 20, and both side walls 21, 21, and a single partition wall 23 is provided at the center thereof. The rear wall 19 and the front wall 20 are lower than the side wall 21 and the rear wall 19 is set slightly lower than the front wall 20, and the upper edge of the partition wall 23 extends from the upper end of the rear wall 19 to the upper end of the front wall 20. A continuous guide edge 23A is formed, and front portions of both side standing walls 21 and 21 are bulging portions 21A and 21A in a direction approaching each other. The fastening tool 11 has a main body portion having a smaller cross-sectional shape than the substrate 43 on the lower surface of the substrate 43 so as to be fitted between the two engagement claws 40 constituting the engagement portion 9 in a retaining state. The claw portions 45, 45 protruding outward from both sides of the lower end of the main body portion 44 are integrally formed.
[0023]
When assembling, first, the seat support portion 5 is inserted into the casing 6 of the outer shell 14 with the orientation of the slide rod 7 set so that the engagement claws 40, 40 are positioned vertically, and Only the engaging claw 40 is elastically deformed upward while sliding on the guide edge 23A of the partition wall 23, and the engaging step portion 41 is located in front of the front wall 20 and is restored to the original shape. 41 is locked to the front wall 20. In this state, the seat support 5 is inserted at a predetermined position in the casing 6. Then, by rotating the slide rod 7 by 90 degrees, the engaging step portions 41, 41 of the both engaging claws 40, 40 are locked to the front surfaces of the bulging portions 21A, 21A of the side standing walls 21, 21 on both sides. Then, from above, the claws 45, 45 of the fastening tool 11 are fitted into the rearward positions of the protruding edges 42, 42 between the engaging claws 40, 40 while deforming the claws 45, 45, and are completely fitted to the main body 44. Then, the claw portions 45, 45 are retained and locked to the lower ends of the engagement claws 40, 40. In this state, the engaging claws 40, 40 can no longer be deformed inward, and do not fall out of the bulging portions 21A, 21A. Finally, the inner shell 13 is fitted to the outer shell 14, and a retaining rib 34 protruding from the inner shell 13 prevents the fastening tool 11 from being removed.
[0024]
Although not shown, as another structure for engaging the distal end portion 8 of the slide rod 7 and the seat plate 1, in the third embodiment, instead of the engaging device 11, a projection is provided on the lower surface of the inner shell 13 in the third embodiment. A structure in which the insertion rod is fitted between the two engagement claws 40, 40 is also considered. Further, support portions are erected on both sides of the upper surface of the outer shell 14 at predetermined intervals, and a constriction portion to be fitted between the support columns at the distal end portion 8 of the slide rod 7 and a protruding portion at the distal end thereof are formed. When the portion 5 is inserted into the casing 6, the distal end portion 8 of the slide rod 7 that emerges forward from the casing 6 is bent upward and deformed, and when the seat support portion 5 is inserted into a predetermined position of the casing 6, the distal end portion is bent. It is also possible to adopt a structure in which the constricted portion of the distal end portion 8 is fitted between the two posts by returning the original 8 to the original position, and at the same time, the protruding portions are locked on the front surfaces of the two posts. In this case, it is assumed that the slide rod 7 is made of a synthetic resin that is relatively easily deformable.
[0025]
【The invention's effect】
According to the chair seat plate sliding device of the present invention configured as described above, since the fastening device is assembled from above the outer shell , the workability is good, and gravity is opposite to the direction in which the fastening device comes off. Because it works, it is difficult to pull out, the fixing force of the fastening device is due to the claw portion provided on the fastening device, so there is no worry about removal, the fixation state of the fastening device can be visually observed, and tools for assembling the fastening device It is unnecessary, and the attachment can be removed with a single flathead screwdriver. Furthermore, the attachment is stopped by the holding rib protruding from the lower surface of the inner shell. This has a remarkable effect that it can be more reliably prevented .
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a chair according to the present invention.
FIG. 2 is a partial vertical sectional side view of a seat plate showing the entire seat plate sliding device of the chair of the present invention.
FIG. 3 is a partial vertical cross-sectional side view showing a state during the assembly.
FIG. 4 is an exploded perspective view showing a main part of the present invention.
FIG. 5 is a partial vertical sectional front view showing an assembled state.
FIG. 6 is an omitted partial cross-sectional view showing a relationship between an engagement portion of a slide rod and a locking portion of an outer shell.
FIG. 7 is an exploded perspective view of a main part showing a second embodiment.
FIG. 8 is an omitted vertical sectional side view showing the assembled state.
FIG. 9 is an omitted vertical sectional front view showing the assembled state.
FIG. 10 is an exploded perspective view of a main part showing a third embodiment.
FIG. 11 is an omitted vertical sectional front view showing the assembled state.
FIG. 12 is an omitted plan view showing the assembled state.
[Explanation of symbols]
Reference Signs List A Leg B Seat C Backrest C1 Backrest support rod 1 Seat plate 2 Mounting body 3 Frame 4 Slide restoration mechanism 5 Seat support 6 Casing 7 Slide rod 8 Tip 9 Engaging part 10 Locking part 11 Engagement Tool 12 Cushion body 13 Inner shell 14 Outer shell 15 Through hole 16 Insertion hole 17 Locking bar 18 Elastic piece 19 Rear standing wall 20 Front standing wall 21 Side standing wall 22 Notch opening 23 Partition wall 24 Flange part 25 Connecting plate 26 Claw part 27 Supporter 28 Tension coil spring 29 Cap 30 Through hole 31 Slider 32 Rubber washer 33 Rubber washer 34 Pressing rib 35 Constriction portion 36 Insertion hole 37 Connecting plate 38 Engagement leg 39 Slit 40 Engagement claw 41 Engagement step portion 42 Ridge 43 Substrate 44 Body 45 claw

Claims (3)

Tubular casings provided on both sides of the seat plate were externally slidable back and forth, and were elastically urged rearward into the seat support portions of the frame, on the seat support portions of both side frames attached to the leg portions. The slide rod is mounted inside and the tip of the slide rod protruding from the front end of the seat support is engaged with the seat plate, and the seat plate is moved forward against the elastic urging force as the occupant moves to the reclining position. What is claimed is: 1. A chair seat plate sliding device which is slidable and slidable rearward by an elastic urging force in accordance with a movement of a seated person to an upright posture, wherein said seat plate is an outer shell of an outer shell forming said casing. a structure fitted to the inner shell polymerization conditions above, thereby forming an engaging portion on the tip portion of the sliding rod, forming the locking portion to the outer shell corresponding to the engagement portion , Butt and engage and engaging swing fittings for fastening tool from above perpendicular to the sliding direction in the engaging portion in a state of being engaged with the engaging portion, the engaging Chakugu the lower surface of the inner shell seat plate sliding device of the chair, characterized in that in setting the pressing rib formed by abutting-stop. The engaging portion of the slide rod has a through hole formed at a distal end portion of a substantially rectangular parallelepiped, the locking portion is an insertion hole having substantially the same shape as the through hole, and the engaging device has the through hole at the center thereof. It has a locking bar that can be simultaneously inserted into the hole and the insertion hole, and has a resilient piece on both sides of the locking bar that has a resilient piece for preventing the distal end of the slide rod from coming off and externally fitting. The chair seat slide device according to claim 1. The seat plate has a structure in which an inner shell in which a cushion body is mounted on an upper surface is fitted on an outer shell in an overlapping state, and the locking portion is a front side of a front open end of the casing on an upper surface side of the outer shell. It is a box-type which is integrally formed with a rear standing wall and a front standing wall provided at a predetermined interval on the front side thereof, and has a front opening wall. 3. The chair seat plate sliding device according to claim 1, wherein the seat plate sliding device is engaged with a lower engaging portion.

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