JP3016453U - Chair - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a new chair that has been devised so as to prevent the deterioration of the smoothness of the rotation of the seat body and the generation of unpleasant noise, and other measures. A seat body 16 that can be turned sideways and can be moved back and forth, and a device that automatically returns the seat body 16 to the front position and the front position at the moment of removing external force are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chair that automatically returns to the front (forward) and front positions when there are no seated occupants.

[0002]

[Prior art]

 Conventionally, according to Japanese Utility Model Laid-Open No. 60-145844, an upward cam having an inclined cam surface on the upper surface is fixed in a cylindrical supporting pipe standing on a underframe, while an axial rod vertically hung on the lower surface of a seat plate. A downward cam having a cam surface that slides in contact with the cam surface of the upward cam is vertically slidably mounted, the downward cam is superposed on the upper surface of the upward cam, and the downward cam is pressed by a spring provided in the support leg pipe. A chair characterized in that it is configured to be pressed against the upward cam is disclosed. The chair is provided with a pair of upper and lower inclined cams as shown in the drawings of the publication. It uses a restoration device.

[0003] Since this chair has a component of a direction restoring device by a pair of upper and lower inclined cams, when the movable-side downward cam rotates due to the rotation of the seat plate, the movable-side downward cam with respect to the fixed-side upward cam. The contact point is located on one side of the rod, and the load is concentrated on the contact point.In this way, when the load is applied on the one-sided portion, the axle is not supported. The contact pressure (braking force) generated between the shaft and the surface contacting the coaxial rod is increased, and the smoothness of rotation of the shaft rod is easily deteriorated, and an unpleasant sound (a metallic sound due to Masatsu) is easily generated.

Also, in this type of chair, the legs are immovably erected on the floor due to the space in the store and the positional relationship with the installed equipment such as a pachinko machine, and the seat does not move to the upper end of the legs. It may be fixed like this. For this reason, there is a problem that particularly tall and young people must endure sitting and devise a posture suitable for operation of equipment such as a pachinko machine.

[0005]

[Problems to be solved by the device]

 The present invention has an object to provide a new chair that is devised to eliminate the above-mentioned deterioration in smoothness of rotation and the generation of unpleasant noises and a solution to the above problems.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a chair according to the present invention is a seat body 16 that can be turned sideways and can be moved back and forth, a device for automatically returning the seat body 16 to the front at the moment of removing external force, and a front position. And a pedestal pipe 3 which is vertically installed on the floor surface 1 or the like with screws 2 and a pedestal, and is rotatable in the pedestal pipe 3. The shaft 12 having the seat body 16 at the upper end thereof, the fixed-side bush 19 fitted in a non-rotatable manner around the shaft 12 in the pedestal pipe 3, and the shaft 12 around the shaft 12 in the pedestal pipe 3 are provided. A movable side which is fitted above the fixed side bush 19 such that the pedestal pipe 3 can rotate and can move up and down and the shaft 12 cannot rotate and can move up and down. bush 1 and a slanted outer upward cam 33 and outer downward facing provided on the outer peripheral half part of the upper end edge surface of the fixed side bush 19 and the outer peripheral half part of the lower end edge surface of the movable side bush 21 so as to slide in contact with each other. The cam 43 and the above-mentioned outer upward / downward cams provided so as to slide in contact with the inner peripheral half of the upper end surface of the fixed bush 19 and the inner peripheral half of the lower end of the movable bush 21. 33, 43, and an inner upward cam 28 and an inner downward cam 38 inclined at the same angle as the opposite direction, and a spring 45 provided in the pedestal pipe in a state in which the movable side bush 21 is pushed down, The front-rear position returning device includes a bed member 55 fixed to the upper end of the shaft 12 and a saddle member 5 mounted on the bed member 55 so as to be slidable in the front-rear direction. When, those having a return spring 67 and 68 to return the same member 52 KakariSo the saddle member 52 forward, the seat body 16 fixed on the saddle member 52.

[0007]

[Action]

 According to the present invention, when the seated person turns his or her body sideways, the seat body 16, the shaft 12, and the movable side bush 21 rotate to the same angle as the turning angle of the body according to the sideways movement, and The inner downward cam 38, the outer downward cam 43, and the inner upward cam 28 and the outer upward cam 33 in the fixed side bush 19 are displaced by the above angle, and the displacement causes the movable side bush 21 to move upward and the spring 45 to contract. When the occupant stands up after leaving the sideways position and leaves the seat, the movable side bush 21 moves downward due to the extension force of the spring 45 contracted in the above, and the inside downward cam 38 and the outside side of the movable side bush 21. The downward cam 43 and the upward upward cam 28 and the outward upward cam 33 of the fixed side bush 19 When the movable side bush 21 rotates when the displacement disappears and the displacement disappears, the shaft 12 and the seat body 16 rotate in a direction opposite to the direction in which the shaft 12 and the seat body 16 are in the horizontal direction and return to the original direction (front direction). When the seated person moves his / her body backward while seated, the seat body 16 and the saddle member 52 do not move backwards against the operating force of the return springs 67, 68 due to the moving force of the body. When the user leaves the seat, the seat body 16 and the saddle member 52 are automatically returned to the front end by the operating force of the return springs 67 and 68.

[0008]

[Effect of device]

 In the chair according to the present invention, as can be understood from the above-mentioned action, the seated person can make the body sideways while seated, and when standing up in the sideways position, the seat body 16 is When the seated person moves forward and backward while seated, the seat body 16 also freely moves back and forth together with the seated person, and is tall or It is of course very convenient for a low person to have a position suitable for operating the equipment installed such as a pachinko machine without putting up with sitting pains, which is of course very convenient. Since the inclination directions of the cam 33 and the outer downward cam 43 are the same as the inclination directions of the inner upward cam 28 and the inner downward cam 38, the outer upward cam 3 in the above-mentioned misalignment state is set. The contact point between the outer downward cam 43 and the outer downward cam 43 is located on one side of the shaft 12, and the contact point between the inner upward cam 28 and the inner downward cam 38 is located on the other side of the coaxial shaft 12, respectively. Since the load is applied in a well-balanced manner, the increase in contact pressure (braking force) generated between the shaft 12 and the surface where the shaft 12 and the shaft 12 contact each other can be reduced to a small amount, and the shaft 12 can rotate smoothly. It is possible to eliminate the deterioration of sex and the generation of unpleasant sound.

[0009]

【Example】

 In the embodiment shown in the figure, a pedestal pipe 3 which is erected by a screw 2 on a floor surface 1 is constructed, and a thrust bearing 5 is provided in the upper end portion of the pedestal pipe 3 with a C-shaped stop ring 4, and the same leg. When the seats 6 of the gas cylinder device 9 described later are fixed in the lower end of the pillar pipe 3, respectively, and when the self-resetting push pin 7 is opened in the pillar pipe 3 of the same leg, the upper end 8 has a built-in spring. Insert a gas cylinder device 9 that rises upward by (not shown) and pushes down the upper end 8 of the cylinder 8 when an external force is applied, and inserts the upper end 8 of the cylinder device 9 into the thrust. The lower end 11 of the cylinder device 9 is fixed to the receiving seat 6 so as not to be vertically movable and rotatably in a state of penetrating upward through the inner diameter hole 10 of the bearing 5, and is vertically operated outside the cylinder device 9. Pipe shaft 12 It is slidably attached in the vertical direction along the outer periphery of the cylinder device 9, and the upper end portion 13 of the vertical operation pipe shaft 12 is fixedly integrated with the upper end portion 8 of the cylinder device 9 by means of a spring pin 14, and the vertical operation pipe is further installed. An upper end of the upper end portion 13 of the shaft 12 is extended upward so that a seat body 16 described later is attached to the male tapered extension portion 15.

Further, a fixed side bush 19 having a diameter of the inner diameter hole 18 larger than that of the vertical operation pipe shaft 12 is fitted around the vertical operation pipe shaft 12 in the pedestal pipe 3, and the fixed side bush 19 is fitted. Is fixed to the seat 6 via a short tubular auxiliary member 20 so as not to be rotatable and vertically movable, and a movable bush 21 is installed at a position above the fixed bush 19 around the vertical operation pipe shaft 12 above the fixed bush 19. The pipe 3 is fitted so as to be rotatable and vertically movable. Spline teeth 22 are provided on the inner peripheral surface of the movable side bush 21 and spline grooves 23 are provided on the outer peripheral surface of the vertical operation pipe shaft 12, respectively. The spline teeth 22 and the spline grooves 23 are fitted to each other, and the upper and lower edge surfaces of the stationary bush 19 are composed of low and high places 24 and 25 and inclined surfaces 26 and 27. An inward upward cam 28 and low / high places 29, 30 and an outward upward cam 33 composed of inclined surfaces 31, 32 are provided, and a low place 24 of the inner upward cam 28 is connected to a low place 29 of the outer upward cam 33. The height 25 of the upward cam 28 is the same as the height 30 of the outer upward cam 33, and the inclined surfaces 26, 27 of the inner upward cam 28 are opposite to the inclined surfaces 31, 32 of the outer upward cam 33. Along with the lower end edge surface of the movable side bush 21, an inner downward cam 38 composed of low and high places 34 and 35 and inclined surfaces 36 and 37, and an outer downward cam 43 composed of low and high places 39 and 40 and inclined surfaces 41 and 42. The lower part 34 of the inner downward cam 38, the lower part 39 of the outer downward cam 43, and the higher part 35 of the inner downward cam 38 are the same height as the higher part 40 of the outer downward cam 43, and A coil spring that sets the inclined surfaces 36 and 37 of the downward cam 38 in the opposite direction to the inclined surfaces 41 and 42 of the outer downward cam 43 and further presses the movable bush 21 between the upper surface of the movable bush 21 and the thrust bearing 5. The legs 46 are formed by sandwiching 45.

The inner upward cam 28, the downward cam 38, the outer upward cam 33, and the outer downward cam 43 are provided when the low portion 34 of the inner downward cam 38 is in contact with the high portion 25 of the inner upward cam 28. The high point 35 of the inner downward cam 38 is at the low point 24 of the inner upward cam 28, the low point 39 of the outer downward cam 43 is at the high point 30 of the outer upward cam 32, and the high point 40 of the outer downward cam 43 is the outer upward cam. 33 of the inner downward cam 38 are in contact with the inclined surfaces 26, 27 of the inner upward cam 28, and the upper 40 of the outer downward cam 43 is in contact with the outer upward cam 33. The upper slope 25 of the inner upward cam 28 is on the slopes 31 and 32 of the inner sloped cam 36, and the upper slope 30 of the outer upward cam 33 is the slope 30 on the outer downward cam 43. 41 and 42 are in contact with each other.

A seat 49 is fixed to the upper surface of a horizontal portion 48 of a frame 47 which is L-shaped when viewed from the side separately from the leg body 46, and a backrest board 51 is fixed to the front surface of the vertical portion 50, so that the seat body 16 is fixed. A saddle member 52 is fixed to the lower surface of the horizontal portion 48 of the frame 47, and a pair of left and right U-shaped guide groove portions 53, 54 are formed on the lower surface of the saddle member 52 and open inward in the longitudinal direction. The bed member 55 is arranged on the lower surface of the saddle member 52, and the outwardly projecting edges 56 and 57 are provided at both left and right edges of the bed member 55. Synthetic resin sliding members 58 and 59, which are configured to be slidably fitted in the U-shaped guide groove portions 53 and 54, are non-detachably attached, and the attaching portions of these sliding members 58 and 59 are described above. By fitting the U-shaped guide groove portions 53 and 54, The saddle member 52 and the seat body 16 are supported on the saddle member 55 so as to be movable back and forth, and a boss 60 is fixed to a substantially central portion of the lower surface of the bed member 55. The tapered extension 15 is made non-rotatable by locking the engaging concave / convex portions 62, 63 and cannot be removed by tightening a screw (not shown), and the rear end of the saddle member 52 and the bed member 55. Two pairs of front and rear spring hooking holes 65 and 66 are provided at the front end of each of the two springs to return the saddle member 52 to the front and rear spring hooking holes 65 and 66. A dogleg-shaped leaf spring 70 is arranged on the inner surface of the rear end wall 69 of the saddle member 52, and an intermediate portion thereof is fixed to the same wall 69 by a rivet 71, and both end portions 72 and 73 of the leaf spring 70 are fixed. Left and right sides of the rear end of the bed member 55 So as to mute the collision sound abuts.

Further, a horizontal shaft 74 is provided in the position near the front end of the bed member 55 in the left-right direction and in a rotationally independent manner, and the intermediate point of the lever-shaped operation lever 75 is provided on the horizontal shaft 74 at the inner end of the operation lever 75. The push pin 7 is fixed on the upper end of the push pin 7 via a slide pin 78 and the outer end 77 of the lever 75 is positioned below the front left portion of the seat 49.

When the user is seated frontward on the seat body 16 of the above-described embodiment and the user turns to the side and turns sideways while trying to leave the seat body 16, the seat body 16 moves up and down. The working pipe shaft 12, the cylinder device 9 and the movable side bush 21 rotate to the same angle (about 90 degrees) as the turning angle of the body, and the inner downward cam 38 and the outer downward cam 43 of the movable side bush 21 and the fixed side bush 19 of the movable side bush 21 rotate. The inner upward cam 28 and the outer upward cam 33 are displaced by the above angle, and due to this displacement, the movable bush 21 is moved upward and the coil spring 45 is contracted. When the user stands up after moving sideways and leaves the seat, the movable bush 21 moves downward due to the expansion force of the coil spring 45 contracted in the above, and the inner downward cam 38 and the outer downward cam of the movable bush 21 are moved downward. 43 and the inner side upward cam 28 and the outer side upward cam 33 in the fixed side bush 19 are not displaced, and the movable bush 21 is rotated when the displacement is eliminated, so that the cylinder device 9, the vertically operating pipe shaft 12 and the seat body are rotated. 16 is rotated in the opposite direction to the case where it is in the lateral direction, and returns to the original direction (front direction).

In the above embodiment, the lower part 34 of the inner downward cam 38 and the upper part of the inner upper cam 28, the higher part 35 of the inner lower cam 38 and the lower part 24 of the inner upper cam 28, and the lower outer cam 28. The seat body 16 faces forward at a position where the low point 39 of 43, the high point 30 of the outer upward cam 32, and the high point 40 of the outer downward cam 43 contact the low point 29 of the outer upward cam 33. .

Further, when the seated user moves the upper body backward while seated, the seat body 16 and the saddle member 52 are acted by the return springs 67 and 68 by the moving force of the upper body. When the user moves backwards against the seat and leaves the seat, the acting force of the return springs 67 and 68 returns the seat body 16 and the saddle member 52 to the front end. The strength of the acting force of the return springs 67 and 68 is set so that the seat body 16 and the saddle member 52 are returned when there is no seated person.

When the outer end 77 of the operating lever 75 is pulled up with a finger, the inner end of the operating lever 75 pushes the push pin 7 through the slide pin 78 to open the push lever 7. When the weight of the seated person and the external force in the downward direction are not applied to the seat body 16 when the push pin 7 is in the open state, the force of the built-in spring of the cylinder device 9 causes the upper end portion 8 of the cylinder device 9. Rises and the seat body 16 rises, and when the seat body 16 rises, the upper end 8 lowers and falls. When the raising operation of the operating lever 75 by the fingers is interrupted while the seat body 16 is being raised or lowered, the push pin 7 returns to the closed state and the upper end 8 of the cylinder device 9 is stopped from moving up and down. The seat body 16 stops at a height midway.

That is, the chair according to the above-described embodiment is capable of automatically returning to the front when the seated person disappears, returning to the fixed position in front, and adjusting the height by operating the lever.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a vertical sectional view showing a state in which a seat body is rotated.

FIG. 4 is a vertical cross-sectional view showing the seat body in a retracted state.

FIG. 5 is an exploded perspective view showing the relationship between the vertical operation pipe axis and the boss.

FIG. 6 is an exploded perspective view showing a relationship between a fixed side bush, a movable side bush, and an auxiliary member.

FIG. 7 is a cross-sectional view of a fixed side bush.

FIG. 8 is a sectional view of a movable bush.

FIG. 9 is an enlarged cross-sectional view showing a mounting portion of the seat body to the leg body.

FIG. 10 is a perspective view showing an assembly of a base member and a saddle member.

FIG. 11 is an exploded perspective view showing the assembly.

[Explanation of symbols] 1 floor 2 screw 3 pedestal pipe 4 C-type stop ring 5 thrust bearing 6 seat 7 push pin 8 upper end 9 cylinder device 10 inner diameter hole 11 lower end 12 vertical operation pipe shaft 13 upper end 14 spring pin 15 Extension part 16 Seat body 18 Inner diameter hole 19 Fixed side bush 20 Auxiliary member 21 Movable side bush 22 Spline teeth 23 Spline groove 24, 25 Low / high places 26, 27 Inclined surface 28 Inner upward cam 29, 30 Low / high places 31 , 32 inclined surface 33 outer upward cam 34, 35 low / high place 36, 37 inclined surface 38 inner downward cam 39, 40 low / high place 41, 42 inclined surface 43 outer downward cam 45 coil spring 46 leg 47 frame 48 horizontal part 49 Seat Board 50 Vertical Section 51 Back Support Board 52 Saddle Members 53, 54 Guide Groove Section 55 Bed Member 56, 57 Outward protruding edge 58, 59 Sliding member 60 Boss 61 Female taper hole 62, 63 Engagement concave / convex portion 65, 66 Spring engaging hole 67, 68 Return spring 69 Rear end wall 70 Leaf spring 71 Rivet 72, 73 End 74 Horizontal Axis 75 Control Lever 76 Inner End 77 Outer End 78 Slide Pin

Claims (3)

[Scope of utility model registration request] 1. A seat body 16 which can be turned sideways and can be moved back and forth, and a device for automatically returning the seat body 16 to the front and the front position at the moment of removing external force. A characteristic chair. 2. The front-facing returning device includes a screw 2 on the floor surface 1 and the like.
And a pedestal to stand the pedestal pipe 3, a shaft 12 having a seat body 16 at the upper end provided rotatably in the pedestal pipe 3, and non-rotatable around the shaft 12 in the pedestal pipe 3. Fixed side bush 19 that is fitted and provided as
In a position above the fixed side bush 19 around the shaft 12 in the pedestal pipe 3, the pedestal pipe 3 is rotatable and vertically movable, and the shaft 12 is not rotatable and vertically movable. The movable bush 21 fitted to the movable bush 21 in a movable state, and the outer bush half of the upper end edge surface of the fixed bush 19 and the outer half half of the lower edge surface of the movable bush 21 are in contact with each other and slide. The slanted outer upward cam 33 and outer downward cam 43 are in contact with the inner peripheral half portion of the upper end edge surface of the fixed side bush 19 and the inner peripheral side half portion of the lower end edge surface of the movable side bush 21 and slide against each other. The inner upward cam 28 and the inner downward cam 38 which are inclined in the same angle as the outer upward / downward cams 33 and 43, which are provided as a state, and the pedestal pie. Claim 1 chair according to the spring 45 provided in a state of pressing the movable bush 21, comprising the within. 3. A front-back position returning device, a bed member 55 fixed to the upper end of the shaft 12, a saddle member 52 slidably mounted on the bed member 55 in the front-back direction, and a saddle member mounted on the saddle member 52. Return springs 67 and 68 for returning the member 52 to the front, and the seat body 1 fixed on the saddle member 52
The chair according to claim 1, further comprising: