JP5550499B2 - Spring pressure adjusting mechanism of link spring device and exercise assisting chair provided with the same - Google Patents

Description

  The present invention relates to a spring pressure adjusting mechanism for a link spring device and an exercise assisting chair provided with the same, and more specifically, a link spring device having a link mechanism configured by connecting a plurality of link members combined in an X shape. The present invention relates to a spring pressure adjusting mechanism and an exercise assisting chair including the same.

  Japan's aging is rapidly progressing, and the ratio of elderly people to the population has risen significantly. Many elderly people are suffering from weakness of their legs and joint pain, and many people are sitting on a chair, but the operation of sitting on a chair or standing up is still a heavy burden. Therefore, in order to reduce the burden when standing up from a chair and to eliminate the burden on the elderly, for example, JP-A-8-670 (Patent Document 1), JP-A-8-112314 (Patent Document 2), JP Various proposals have been made in Japanese Patent Laid-Open No. 2004-267410 (Patent Document 3).

  Under such circumstances, the inventors of the present invention have developed a patent application for a link spring device in which the entire link mechanism works like a single spring (Japanese Patent Laid-Open No. 2007-107678 (Patent Document 4)). ) By using the link spring device, it can be used as a chair, and it is possible to perform an appropriate exercise by repeating it while assisting the user to sit on or stand up on the chair. A chair having an exercise assisting device function was developed and proposed (Japanese Patent No. 3795057 (Patent Document 5)).

  In the above-described link spring device invented by the inventors of the present invention, as shown in Patent Documents 4 and 5, when a load is applied, the link gradually lowers and becomes lower, but to a certain height. When it becomes lower, the force to support the load is weakened. In other words, this link spring device gradually contracts while supporting a strong load at a certain height, but when it is compressed to a certain extent, the link mechanism is now compressed with a force weaker than the force applied so far. It becomes like this.

  In this regard, in the case of a normal push spring, when a load is applied gradually from an unloaded state, it can be initially shrunk with a small load, but the repulsive force gradually increases as the shrunk. However, this link spring device has the property that it acts on the load in a completely opposite manner to the conventional push spring. For this reason, when the user sits on the chair and the seat part falls to some extent and the weight of the link spring device is weakened when the weight of the user is applied to the chair, the seat surface suddenly falls, which is not practically preferable. Therefore, in the chair provided with the exercise assisting tool function shown in the cited document 5, a spring pressure adjusting mechanism in which a pulling spring for adjusting the pressing force is provided in the horizontal direction is provided on the base, and the link spring device is provided by the pulling force of the pulling spring. It was configured to be able to adjust the attenuation.

  However, since the spring pressure adjusting mechanism of the cited document 5 uses a pulling spring, the length of the spring becomes long, so that the surface area of the pedestal must be increased accordingly, and there is a problem that the place of placement is restricted. Of course, if the surface area of the pedestal is large, the stability of the chair is good, but if it takes up too much space, it is not convenient.

  Therefore, the inventors of the present invention, unlike the chair having the exercise assisting device function shown in the cited document 5, in order to allow the entire chair to be compacted without taking up a large surface area of the pedestal. We devised a spring pressure adjustment mechanism for adjusting the pressing force of the link spring device arranged in the direction (height direction), and proposed a chair equipped with a bending-extension motion assisting function attached to it (Utility Model Registration No. 1) 3180771 (patent document 6)).

  According to the chair provided with the bending / extending motion assist function shown in Patent Document 6, since the elastic body is arranged so that the spring pressure adjusting mechanism expands and contracts in the expansion / contraction direction of the link spring device, that is, the vertical direction, it is necessary to increase the surface area of the base. Although it became possible to make the whole chair compact while eliminating the attenuation of the pressing force of the link spring device, this spring pressure adjusting mechanism was configured to be provided outside the link spring device. . For this reason, there is a concern that the entire chair becomes larger, the entire apparatus becomes complicated, the number of parts increases, and maintenance takes time.

  For this reason, the present inventors have made further studies and made the spring pressure adjusting mechanism for eliminating the attenuation of the pressing force of the link spring device a simpler mechanism, and the chair using the link spring device is simple and compact. We have made a great effort to develop a link spring device that incorporates a spring pressure adjustment mechanism that eliminates the damping of the link spring device. Specifically, when the link mechanism expands and contracts, the length from the intersection of the link plate to the lower end of the link plate of the link member arranged at the lowermost part of the link mechanism crosses in an X shape. A guide member that guides along an arcuate curved surface with a radius of λ is provided so that attenuation that occurs when the link mechanism is compressed downward can be suppressed (Patent Document 7). ).

JP-A-8-670 JP-A-8-112314 JP 2004-267410 A JP 2007-107678 A Japanese Patent No. 3795057 Utility Model Registration No. 3138071 Japanese Patent No. 4509214

However, although the spring pressure adjusting mechanism of Patent Document 7 can eliminate the attenuation of the pressing force of the link spring device, it is difficult to adjust the pressing force of the spring pressure adjusting mechanism itself.
Therefore, the present invention provides a spring pressure adjusting mechanism for a link spring device capable of adjusting the pressing force of the spring pressure adjusting mechanism for eliminating the damping of the link spring device, and an exercise assisting chair including the same. For the purpose.

In order to solve the above-mentioned problem, the invention according to claim 1 is arranged such that two link plates are arranged so that link members that intersect each other in an X shape are opposed to each other, and a pair of link members that are opposed to each other. The intersections are connected by the central axis and the end portions of the link plate are connected by the connection shafts to form a link unit. The upper link axis of the link unit and other links arranged on the link unit. A link mechanism that can be expanded and contracted is formed by connecting a plurality of connection shafts so as to share the connecting shaft on the lower side of the unit, and the connecting shafts positioned so as to face each other are biased in the direction in which the link mechanism is extended. In the spring pressure adjustment mechanism for eliminating the attenuation of the pressing force at the time of compression of the link spring device constructed by laying the elastic member to be The mechanism fixes the lower end portion of the link plate on one side of the pair of link members constituting the link unit arranged at the lowermost portion to the base plate, and the lower end portion of the link plate on the other side is provided on the base plate, respectively. One side or a plurality of elastic members, one end of which is movably disposed on a pair of tracks, one end of which is locked to the adjustment plate, is disposed between the pair of tracks, and the other side is movably disposed on the pair of tracks. A contact member provided with a mounting plate that moves in conjunction with the movement of the lower end of the link plate, and one or a plurality of adjustment bolts attached to the mounting plate so as to correspond to one or a plurality of elastic members It was placed, via the elastic member and the adjustment plate adjusting bolt corresponding to when the pressing force has reached the position where the attenuated contracted push linkage abutment Characterized in that it is configured to reduce the attenuation of the link mechanism by Rukoto.

In order to solve the above-mentioned problem, the invention according to claim 2 is the spring pressure adjustment mechanism of the link spring device according to claim 1 , wherein the adjustment bolt is capable of changing a position where it abuts against the elastic member. It is characterized by.

In order to solve the above-mentioned problem, the invention according to claim 3 is the spring pressure adjusting mechanism of the link spring device according to claim 1 or 2 , wherein the end of the elastic member opposite to the side on which the contact member abuts. The portion is attached to a surplus pressure adjusting plate, and the surplus pressure adjusting plate can adjust the spring force of the elastic member by changing its position.

In order to solve the above-mentioned problems, a fourth aspect of the present invention provides an exercise assisting chair provided with the spring pressure adjusting mechanism of the link spring device according to any one of the first to third aspects.

In order to solve the above-mentioned problem, the invention according to claim 5 is the exercise support chair according to claim 4 , wherein the exercise support chair is provided with armrests on both the left and right sides, and the armrest has a user at the tip. A support bar having a handle for gripping is provided so as to be extendable in the front-rear direction and the up-down direction.

  According to the spring pressure adjusting mechanism of the link spring device according to the present invention, the link mechanism is moved in conjunction with the movement of the lower end portion of the link plate on the other side when the link mechanism is compressed and reaches the position where the pressing force is attenuated. Since the abutting member that abuts against the elastic member reduces the attenuation of the link mechanism, it is possible to eliminate the attenuation of the pressing force of the link spring device with a compact configuration without arranging an extra mechanism outside. There is an effect that can be.

  In addition, by changing the elastic member to an appropriate strength or by attaching the end of the elastic member to the residual pressure adjusting plate, the spring pressure of the elastic member can be adjusted. There is an effect that the attenuation of the pressing force of the link spring device can be adjusted with an appropriate force.

  Furthermore, according to the exercise assisting chair provided with the spring pressure adjusting mechanism of the link spring device according to the present invention, the pressing force of the link spring device is adjusted by adjusting the spring pressure of the elastic member according to the weight of the user. There is an effect that the attenuation can be eliminated accurately.

  Further, according to the exercise assisting chair provided with the spring pressure adjusting mechanism of the link spring device according to the present invention, the support bar provided with the handle gripped by the user at the tip is provided to be extendable in the front-rear direction and the up-down direction. There is an effect that the user can safely perform bending and stretching exercises.

It is a perspective view which shows the structure of one Embodiment of a link spring apparatus. It is a perspective view which shows the structure of a link unit. It is a perspective view which shows the state which the link spring apparatus shrunk. It is a perspective view of the chair for exercise assistance provided with the spring pressure adjustment mechanism concerning the present invention. FIG. 5 is a schematic plan view of the spring pressure adjusting mechanism shown in FIG. 4. FIG. 6 is a partial side view of FIG. 5. It is a side view which shows the use condition of one Embodiment of the chair for exercise assistance which concerns on this invention. It is side surface sectional drawing which shows the structure of a support bar. It is a schematic plan view of the spring pressure adjustment mechanism in a state where the seat is positioned at the top. It is a schematic plan view of a spring pressure adjusting mechanism when using a main spring and a sub spring. It is a schematic plan view of a spring pressure adjusting mechanism when a main spring and one sub spring are used. It is a schematic plan view of the spring pressure adjusting mechanism when only the main spring is used. It is a schematic plan view of a spring pressure adjusting mechanism when only a subspring is used.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a spring pressure adjusting mechanism of a link spring device according to the present invention and an exercise assisting chair including the same will be described with reference to the drawings. First, the configuration of an embodiment of the link spring device will be described, and then the link spring device according to the present invention will be described. Thereafter, the spring pressure adjustment mechanism of the link spring device and the exercise assisting chair including the same are preferable. An embodiment will be described. FIG. 1 is a perspective view showing a configuration of an embodiment of a link spring device, and FIG. 2 is a perspective view showing a configuration of a link unit.

[Configuration of link spring device]
As shown in FIG. 2, the link spring device 20 is generally configured by connecting three link units 201 to 203 in the vertical direction. These link units 201 to 203 will be described by taking the link unit 201 as an example. As shown in FIG. 1, a link member 211a formed by intersecting two elongated plate-like link plates 215a and 215b in an X shape. , 211b are arranged so as to be opposed to each other, and the intersections of the link plates 215a and 215b of the link members 211a and 211b are rotatably connected by the central axis 217, and both ends of the link plates 215a and 215a facing each other The vicinity is connected by connecting shafts 219a and 219a, and the vicinity of both ends of the opposing link plates 215b and 215b is connected by connecting shafts 219b and 219b, respectively, thereby forming a link unit 201. The link units 202 and 203 are also formed with substantially the same configuration as the link unit 201. In addition, the same code | symbol is attached | subjected to the same member also about link unit 202,203, and the description is abbreviate | omitted.

  The link plates 215a and 215b are, for example, plate-like members formed by making a steel plate into an elongated and thin plate shape, and hole portions 219c and 219f are formed in the vicinity of both ends thereof, and a hole portion 217a is formed in the center portion. It is installed. Accordingly, the link plates 215a and 215b are provided with holes in at least three locations. Of course, the material and shape of the link plates 215a and 215b are not limited to this, and can be formed of an appropriate material having rigidity.

  The connecting shafts 219b and 219b arranged on the lower side of the link unit 203 are shared with the upper connecting shafts 219a and 219a of the link unit 202 arranged on the lower side as shown in FIG. Similarly, in the other link units 202 and 203, the connection shafts 219a and 219a and the connection shafts 219b and 219b are shared. In FIG. 2, the reference numerals of the common connecting shafts are shown as 219a and 219b, respectively, but they are substantially the same whether they are shown as 219a and 219b. In this way, a link mechanism that can be expanded and contracted is formed by connecting a plurality of link units 201 to 203 in the vertical direction.

  In the link mechanism thus formed, the direction in which the link mechanism is extended between the connecting shafts 219a and 219a and the connecting shafts 219b and 219b arranged in parallel so as to face each other (FIG. 2). An elastic member 220 made of, for example, a tension spring is erected in the direction of the arrow in FIG. One or a plurality of elastic members 220 can be disposed between the pair of connecting shafts 219a and 219a and the pair of connecting shafts 219b and 219b.

  The central shaft 217 that connects the hole portions 217a and 217a of the pair of link members 211a and 211b formed by the link plates 215a and 215b is formed of a round bar-like member. On the other hand, the connecting shafts 219a and 219b that connect the hole portions 219c and 219f of the link plates 215a and 215b are also formed of a round bar-like member. By appropriately adjusting the lengths of the central shaft 217 and the connecting shafts 219a and 219b and the lengths of the link plates 215a and 215b, a stable link spring device 20 having a relatively large mounting area can be obtained. The link spring device 20 can be used. In addition, by interposing a ball bearing or the like on the central shaft 217 and the connecting shafts 219a and 219b, the link plates 215a and 215b can be smoothly opened and closed, and the expansion and contraction of the link spring device 20 can be made smoother.

[Configuration of spring pressure adjustment mechanism]
The link spring device 20 described above has a property that, when a load is applied from above in the direction in which the link is pressed and contracted, the link gradually lowers and becomes lower, but when it is lowered to a certain height, the force to support the load is weakened. . Therefore, a spring pressure adjusting mechanism according to the present invention for eliminating this force attenuation will be described below based on a preferred embodiment. 4 is a perspective view of an exercise assisting chair provided with a spring pressure adjusting mechanism according to the present invention, FIG. 5 is a schematic plan view of the spring pressure adjusting mechanism shown in FIG. 4, and FIG. 6 is a partial side view of FIG. .

[Composition of exercise assisting chair]
First, the exercise assisting chair 10 shown in FIG. 4 has four legs 14, 14, armrests 13, 13, a backrest 11, and a user sitting on a flat base plate 16. The seat part 12 is provided. With the bottom surface of the seat 12 is supported on the upper side of the link unit 20 third link spring mechanism 20 described above, although the lower side of the link unit 20 1 is connected to the spring pressure adjustment mechanism 50 to be described later, the link spring The device 20 and the spring pressure adjusting mechanism 50 are covered with a cover 15 so that the inside is not exposed. This is because it is dangerous if the mechanism is exposed, and it is not preferable in appearance. Note that the cover 15 is configured to be, for example, a telescopic type or a bellows shape so that the internal mechanism is always covered even when the link spring mechanism 20 expands and contracts. The illustrated link spring mechanism 20 is configured in three stages of the link units 201 to 203, but is not limited to this, and can be configured in three or more stages. In addition, the armrests 13 and 13 are provided with a support bar 30 provided with a handle 31 gripped by the user at the tip so as to be extendable in the front-rear direction and the vertical direction.

  As shown in FIGS. 5 and 6, on the base plate 16, the lower ends of the link plates 215 b and 215 b on one side of the pair of link members constituting the lowermost link unit 201 of the link spring mechanism 20 are respectively connected to the base plate 16. Attaching portions 51 and 51 for fixing are provided, and rails 55 and 55 which are tracks that movably guide the lower end portions of the opposite side link plates 215a and 215a are arranged.

  The rail 55 is arranged so as to extend along the moving direction of the link unit 201, and the left and right edges in the longitudinal direction are wall surface portions 55a formed to rise at a predetermined height, and the wall surface portion 55a. Opening 55b is formed in (see FIG. 6). Two wheels 56 and 56 are attached to a connecting shaft 219a that connects the pair of link plates 215a and 215a. Here, if the connecting shaft 219a is a linear bar member, it interferes with an elastic member unit 60, which will be described later, disposed between the rails 55, 55, so that the middle portion of the connecting shaft 219a is cut. A pair of link plates 215 a and 215 a are connected by bolts 57 by a connecting member 58 formed in a “U” shape so as not to hit the elastic member unit 60. 5 shows a state in which the link spring mechanism 20 is pushed down most, and FIG. 9 shows a state in which the link spring mechanism 20 is extended most.

  A surface of the “U” -shaped connecting member 58 positioned in a direction orthogonal to the extending direction of the rails 55, 55 is a mounting plate 58a, and three adjustment bolts 59a, 59b, 59c are mounted on the mounting plate 58a. ing.

  On the other hand, the elastic member unit 60 includes a first adjustment plate 61, a second adjustment plate 62, and a residual pressure adjustment plate 63, and between the first adjustment plate 61 and the residual pressure adjustment plate 63. A main spring 65 a that is an elastic member is stretched, and sub-springs 65 b and 65 c that are elastic members are stretched between the second adjustment plate 62 and the residual pressure adjustment plate 63. When the link spring mechanism 20 is compressed and the wheels 56 and 56 move on the rail 55 to reach a point where the pressing force of the link spring mechanism 20 is attenuated, the tip of the adjustment bolt 59a is the first adjustment plate. The spring force of the main spring 65 a is configured to cancel the damping of the link spring mechanism 20 by abutting on 61.

  In addition, through holes are provided at positions corresponding to the positions of the adjustment bolts 59 b and 59 c of the first adjustment plate 61, and the adjustment bolts 59 b and 59 c are not obstructed by the first adjustment plate 61 and the second adjustment is performed. It is formed so as to be able to contact the plate 62. Thereby, when the force for canceling the damping of the link spring mechanism 20 is further required, the damping of the link spring mechanism 20 is surely canceled by the sub springs 65b and 65c arranged on both sides of the main spring 65a. ing.

  Further, a surplus pressure adjusting bolt 67a attached to the support plate 67 is disposed so as to abut on the surplus pressure adjusting plate 63 opposite to the side on which the main spring 65a and the sub springs 65b and 65c are attached. . The spring pressure of the main spring 65a and the sub springs 65b and 65c can be adjusted by adjusting the position where the residual pressure adjusting plate 63 and the residual pressure adjusting bolt 67a abut by turning the residual pressure adjusting bolt 67a. ing.

  On the other hand, a position adjustment plate 66 is provided in the vicinity of the mounting portions 51, 51 so that the heads of the adjustment bolts 59 a, 59 b, 59 c abut on the position adjustment plate 66. The height position when the link spring mechanism 20 is extended can be adjusted by adjusting the contact positions of the adjustment bolts 59a, 59b, 59c and the position adjustment plate 66. That is, if the position adjustment plate 66 is arranged close to the elastic member unit 60 side, the height of the uppermost portion of the link spring mechanism 20 can be lowered, and conversely, the position adjustment plate 66 is separated from the elastic member unit 60 side. If it arrange | positions, the height of the uppermost part of the link spring mechanism 20 can be made high. Thereby, the height position of the seat portion 12 can be adjusted.

[Adjustment of spring pressure]
Next, adjustment of the spring pressure of the spring pressure adjustment mechanism 50 using the adjustment bolts 59a, 59b, 59c will be described. First, FIG. 9 is a schematic plan view of a spring pressure adjusting mechanism showing a state when the link spring mechanism 20 is extended and the seat portion 12 is positioned at the uppermost portion. In this state, the “U” -shaped connecting member 58 is located on the left side of the drawing, and the adjustment bolts 59 a, 59 b, 59 c attached to the attachment plate 58 a are in contact with the position adjustment plate 66. When the link spring mechanism 20 is pushed and contracted by the user sitting on the seat 12, the wheels 56 and 56 move to the right as shown in FIG. 10 as the link unit 201 opens. Then, almost simultaneously with the adjustment bolt 59 a contacting the first adjustment plate 61, the adjustment bolts 59 b and 59 c pass through the through hole of the first adjustment plate 61 and contact the second adjustment plate 62. Thereby, the attenuation of the pressing force of the link spring mechanism 20 is canceled by the spring pressure of the main spring 65a and the sub springs 65b and 65c.

  Next, FIG. 11 shows an example in which a main spring 65a and one sub spring 65b are used. As shown in the drawing, when the link spring mechanism 20 is compressed and reaches a point where the pressing force attenuates, the adjustment bolt 59b is brought into contact with the first adjustment plate 61 almost simultaneously with the first adjustment plate 59b. The adjustment bolt 59c is in contact with the second adjustment plate 62 and is adjusted so as not to contact the second adjustment plate 62. By adjusting in this way, it is possible to adjust the attenuation of the pressing force of the link spring mechanism 20 using the spring force of the main spring 65a and one sub spring 65b.

  Next, FIG. 12 shows an example in which only the main spring 65a is used. As shown in the figure, when the link spring mechanism 20 is compressed and reaches a point where the pressing force attenuates, only the adjustment bolt 59a contacts the first adjustment plate 61, and the adjustment bolts 59b and 59c are respectively The state adjusted so that it may not contact | abut to the 2nd adjustment plate 62 is shown. By adjusting in this way, it is possible to adjust the attenuation of the pressing force of the link spring mechanism 20 using only the spring force of the main spring 65a.

  Next, FIG. 13 shows an example in which only the sub springs 65b and 65c are used and the main spring 65a is not used. As shown in the drawing, when the link spring mechanism 20 is compressed and reaches a point where the pressing force is attenuated, the adjusting bolts 59b and 59c abut against the second adjusting plate 62, respectively. The state adjusted so that it may not contact | abut to the one adjustment plate 61 is shown. By adjusting in this way, the attenuation of the pressing force of the link spring mechanism 20 can be adjusted using only the spring force of the subsprings 65b and 65c.

[Composition of support bar]
Next, the support bar 30 provided on the armrests 13 of the exercise assisting chair 10 will be described. FIG. 7 is a side view showing the use state of the exercise assisting chair, and FIG. 8 is a side sectional view showing the structure of the support bar. The inside of the armrest 13 has a hollow shape, and a push spring 35 is incorporated inside. A horizontal bar 34 is inserted into the armrest 13 so as to penetrate the inside of the push spring 35. The end on the back side of the horizontal bar 34 is connected to the end on the back side of the pressing spring 35, and the end on the outlet side of the pressing spring 35 is fixed to the armrest 13. An anti-rotation pin 34 a is attached so that the horizontal bar 34 does not rotate in the armrest 13, and the end of the push spring 35 on the outlet side is fixed to the pin 34 a.

  On the other hand, a hollow holding member 36 is attached to the tip of the horizontal bar 34, and a vertical bar 32 erected in the vertical direction so as to penetrate the holding member 36 is inserted. A handle 31 is provided on the top of the vertical bar 32 so that the user can hold it by hand. A push spring 33 is built in the vertical bar 32 between the holding member 36 and the handle 31 and urges the vertical bar 32 to be pulled upward. A pin 32 a for preventing rotation is attached to the holding member 36 so that the vertical bar 32 does not rotate, and a stone protrusion 37 is attached to the lower end portion of the vertical bar 32.

  With this structure, as shown in FIG. 7, the support bar 30 moves up and down and back and forth in accordance with the movement of the user U sitting or standing up, so that a better position can be taken when performing bending and stretching movements. In addition, since the support bar 30 may move carelessly up and down and back and forth if the push springs 33 and 35 are too weak, it is preferable to use one having appropriate elasticity. Further, by providing a stopper (not shown), the support bar 30 can be fixed so as not to move.

  As described above, according to the spring pressure adjustment mechanism of the link spring device according to the present invention and the exercise assisting chair provided with the same, the first adjustment plate can be appropriately changed by changing the positions of the plurality of adjustment bolts. And by adjusting the contact state with the second adjustment plate, the main spring and / or the sub spring is used to adjust the spring pressure to prevent the link spring device from being attenuated. Thus, it becomes possible to make appropriate adjustments. In addition, since the spring pressure adjusting mechanism is not exposed to the outside, it is possible to provide an exercise assisting chair that is neatly visible.

  The present invention is not limited to the specific embodiment described above, and it goes without saying that various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

DESCRIPTION OF SYMBOLS 10 Exercise support chair 11 Backrest 12 Seat part 13 Armrest 14 Leg 15 Cover 16 Base plate 20 Link spring apparatus 30 Support bar 31 Handle 32 Vertical bar 33 Push spring 34 Horizontal bar 35 Push spring 50 Spring pressure adjustment mechanism 51 Attachment part 55 Rail 55a Wall surface portion 55b Opening portion 56 Wheel 58 Connecting member 58a Mounting plate 59a, 59b, 59c Adjustment bolt 60 Elastic member unit 61 First adjustment plate 62 Second adjustment plate 63 Residual pressure adjustment plate 65a Main spring 65b, 65c Subspring 67a Residual pressure adjusting bolt U User

Claims (5)

The link members formed by crossing two link plates in an X shape are arranged so as to face each other, and the intersections of the pair of link members facing each other are connected by a central axis, respectively, and the end of the link plate A link unit is formed by connecting the vicinity of each part with a connecting shaft, and the upper connecting shaft of the link unit is shared with the lower connecting shaft of another link unit disposed thereon. A link mechanism that is configured by forming a link mechanism that can be expanded and contracted by connecting a plurality of links, and by laying an elastic member that urges the connecting shafts positioned so as to face each other in a direction in which the link mechanism extends. In the spring pressure adjustment mechanism for eliminating the attenuation of the pressing force during compression of the spring device,
The spring pressure adjusting mechanism is
A pair of link members that constitute the link unit disposed at the lowermost portion are fixed to the base plate at the lower ends of the link plates on one side, and the lower ends of the link plates on the other side are respectively attached to the base plate. Arranged to be movable on the orbit,
One or more elastic members, one end of which is locked to the adjustment plate, are arranged between the pair of tracks,
The mounting plate includes a mounting plate that moves in conjunction with the movement of the lower end of the other link plate that is movably disposed on the pair of tracks, and the mounting plate corresponds to one or a plurality of the elastic members. In this manner, a contact member to which one or a plurality of adjustment bolts are attached is arranged,
When the link mechanism is compressed and reaches a position where the pressing force is attenuated, the adjustment bolt makes contact with the corresponding elastic member via the adjustment plate so as to reduce the attenuation of the link mechanism. A spring pressure adjusting mechanism for a link spring device, characterized in that it is configured. In the spring pressure adjustment mechanism of the link spring device according to claim 1 ,
A spring pressure adjustment mechanism for a link spring device, wherein the adjustment bolt is capable of changing a position where it comes into contact with the elastic member. In the spring pressure adjustment mechanism of the link spring device according to claim 1 or 2 ,
The end of the elastic member opposite to the side on which the abutting member abuts is attached to a surplus pressure adjusting plate, and the surplus pressure adjusting plate changes the position of the surplus pressure adjusting plate to thereby apply the spring force of the elastic member. A spring pressure adjusting mechanism for a link spring device, wherein the spring pressure adjusting mechanism is adjustable. The exercise assistance chair provided with the spring pressure adjustment mechanism of the link spring apparatus of any one of Claim 1 to 3 . The exercise assistance chair according to claim 4 ,
The exercise support chair is provided with armrests on both the left and right sides,
The armrest is provided with a support bar having a handle gripped by a user at a tip thereof so as to be extendable in the front-rear direction and the up-down direction.

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