JP2008062015A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair allowing a user to perform manual works with significantly reduced burdens on the user's body (especially arms). <P>SOLUTION: The chair includes a leg device 1 with casters, a saddle-shaped seat 3, a front support 4 for supporting the chest or the abdomen or both of the seated person, and left and right arm supports 5. Each arm support 5 is attached to the front ends of a branch frame 17 branching from the branch frame 17 in such a way as slidable and horizontally rotatable. Since the position and the posture of the arm support 5 is changeable following the movement of the arm of the user, the user can perform various works with the arms rested on the arm supports 5. Further, as the upper half body of the user is supported by the front support 4 and the arms are supported by the arm supports 5, the user can perform the works while holding an object in hand, feeling significantly reduced fatigue. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chair suitable for use when a person performs manual work.

  The chair is a seat on which a person sits. Therefore, the seat is an essential component, and other components are added depending on the application. Representatives of elements added to the seat in a normal chair are a backrest and an elbow rest (armrest). The backrest supports the upper body of the person, and a comfortable state is ensured by tilting backward against the elasticity. The elbow pads are placed on the left and right sides of the seat and are generally used to hold the arm in a comfortable state, as can be inferred from the word “armrest”.

  Chairs may be used for special purposes. For example, Patent Document 1 discloses that an abdomen and an elbow support are provided on a chair for the purpose of using the chair for a health appliance. Patent Document 2 includes an upper body support that supports a person's chest as a surgical chair used for medical or similar acts, and an elbow support that allows the person to place an elbow with the chest applied to the upper body support. And providing a headrest for supporting a person's head. Patent Document 3 also discloses a chair having a structure similar to that of Patent Document 2.

Further, in Patent Document 4, an elbow support is formed integrally with a backrest that also serves as a front support so that the elbow can be placed on the elbow support both in a state where the back is applied to the backrest and a state where the chest or abdomen is applied. A kind of posture correcting chair is disclosed.
JP 2002-125803 A Japanese Patent Laid-Open No. 2002-336311 Japanese Patent Publication No. 6-69469 Japanese Patent Publication No. 3-42086

  Humans often perform manual work while sitting on a chair, and there are various types of manual work performed on this chair. For example, desk work such as general office work and personal computer operation (keyboard operation, mouse operation), manual work such as assembly work and inspection work in the factory, taking care of the food and body of people sleeping in the bed There are assistance (nursing) work and work to process and process the work placed on the table.

  When working with a person sitting on a chair, the person often takes a forward leaning posture. Then, the burden on the lower back may cause back pain, or the internal organs may be compressed, causing gastrointestinal disturbances. It can cause problems such as stiff shoulders and dullness. In particular, in the case of work involving lifting and movement of objects, such as assistance work and assembly work, the burden on the upper body becomes stronger, and thus diseases and obstacles appear remarkably.

  Therefore, if the burden on the human body when working in the sitting state can be reduced, not only can the health of the person who performs the work be ensured, but the medical expenses can be reduced by preventing illness / disability, and the work speed can be reduced. It can be said that productivity can also be improved by raising and lowering the absenteeism rate.

  The present invention has been made in view of such a situation, and it is an object of the present invention to provide a chair that allows a person to work in a state where the burden on the body (for example, the waist, arms, and shoulders) is reduced.

  In many cases, it is unavoidable that the upper body of the person who sits down becomes a forward leaning posture, but if the upper body of the forward leaning posture is supported from the front, the burden on the body is remarkably reduced. There is also the fact that the weight of the arm is a burden on the body because the human arm has a certain weight. The inventors of the present application have completed the invention of each claim by repeating research and trial production based on such knowledge.

  The chair according to the invention of claim 1 includes a seat on which a person sits, a front support on which a seated person can put his chest, and an elbow support on which the seated person can put his elbow in a state where his chest is placed on the front support. The front support is arranged so as to spread on both upper and lower sides of the elbow support. In the first aspect of the present invention, a person's stomach may hit the front support (that is, it is sufficient that at least the chest can be supported).

  The chair according to the invention of claim 2 is a seat on which a person sits, a front support on which a seated person can hit the chest or the abdomen, or both, and a seated person can put an elbow in a state where the upper body is applied to the front support A pair of left and right elbow supports, wherein the elbow support is capable of changing at least one of a posture in plan view, a position in plan view, and a posture in side view. Is attached.

  The chair according to the invention of claim 3 is a seat on which a person sits, a front support on which a seated person can hit his chest, and a pair of left and right elbows on which the seated person can put his elbows with his upper body in contact with the front support The front support is formed in a state of spreading on both the upper and lower sides of the elbow support, while the left and right elbow supports are in a plan view position, a plan view position, and a side view posture. Are attached to the support member so that at least one of them can be changed.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the seat support base for supporting the seat is further provided, and the front support is attached to a column fixed to the seat support base. On the other hand, the elbow support is attached to a branch frame branched from the support column, and the elbow support is separated into left and right and is flat so that a human elbow can be placed in a stable state. The elbow support is attached to the branch frame so as to be movable in the longitudinal direction and horizontally rotatable.

  For example, when the work is performed with the chair of Patent Document 1, there is a high possibility that the abdomen is excessively compressed and the health is impaired. On the other hand, according to the invention of claim 1, since the front support extends above and below the elbow support, the upper body of the person is supported over a wide range by the front support. Even in a drowned state, there is no or almost no pressure. As a result, the burden on the upper body when performing work can be significantly reduced.

  In addition, since the person can work with the elbows on the elbow support, the weight of the arm is not burdened on the upper body, and the upper body is supported by the left and right arms. In this aspect as well, the burden on the person is significantly reduced. Furthermore, if there is nothing to support the upper body, people tend to be stupid due to the burden on the arm, etc., which was a distant cause of various disorders and diseases, but in the present invention the upper body of the person is front support Because it is supported and the left and right elbows are supported by the elbow support, it can be used for processing and processing using objects and removing and placing objects without becoming stooped, so the burden on the body is reduced. Work can be done in a significantly reduced state.

  When a person performs a manual operation in a sitting state, the position and posture of the arm (particularly the lower arm) have a suitable state depending on the operation. Also, the arm (especially the lower arm) is often moved during work. According to the second aspect of the present invention, the elbow support is movable, so that the position and posture of the person's arm are maintained in a state suitable for work, or the elbow support moves following the movement of the arm. It becomes possible to do. For this reason, the burden on the operator can be reduced also in claim 2.

  The configuration of claim 3 is more suitable because it combines the configurations of claims 1 and 2. Furthermore, if comprised like Claim 4, since a front support and an elbow support are supported by one support | pillar, it becomes a simple structure and it is refreshing also in an external appearance. Further, when the elbow support is elongated, the arm can be supported stably, and the elbow support can be supported in any posture and position by combining the longitudinal slide and horizontal rotation. Since the support follows and moves, various operations can be performed without burden, which is particularly suitable.

  In addition, when the elbow support is elongated in plan view as in claim 4, if the left and right elbow supports can be changed in posture to a horizontally long posture that extends in a straight line, the elbow support can be attached to the body of the user. Since the dimension which protrudes ahead can be suppressed, it is an advantage that the elbow support can be prevented from getting in the way of work, and the entire chair can be made compact when not in use.

  In addition, for example, when used for assistance (eg caring for a body or caring for a meal) at a nursing home, etc., the elbow support is assisted by placing the elbow on the left and right elbow supports in a straight posture. The caregiver can perform the work as close as possible to the person being assisted, so that the caregiver can easily carry out the work, while the caregiver seems to touch the elbow support. It is suitable without feeling uneasy.

  In addition, even in an operation for handling an object, such as an assembly operation in a factory line, the operation can be performed by bringing the body close to the work object, so that there is an advantage that the operation can be easily performed. In addition, when the front support and the elbow support are lifted and lowered independently as in the first embodiment, there is an advantage that a difference in human physique (especially height) and a difference in work conditions can be accurately handled. Of course, the structure which can raise / lower a front support and an elbow support together like 2nd Embodiment is also employable.

  Next, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment will be described with reference to FIGS.

(1). Outline of First Embodiment FIG. 1A is a perspective view of a chair, FIG. 1B is a front view, FIG. 2A is a plan view of the whole, and FIG. FIG. 3 is a side plan view showing another example. As shown in these drawings, the chair is supported by the leg 1, the seat base 2 fixed to the upper end of the leg 1, and the seat base 2. A seat support 3, a front support 4 on which a seated person can hit the chest and abdomen, and a pair of left and right elbow supports 5 on which the seated person can put an elbow while the chest and abdomen are applied to the front support 4 Yes. The front support 4 is tilted backward at a slight angle with respect to the vertical in a side view. Therefore, the person can lean on the front support 4 with a slight forward inclination.

  The leg 1 has a structure in which a radial strut 7 is provided on a leg strut (gas cylinder) 6 that can be adjusted in height, and a caster 8 is attached to the leg 7. Although the detailed structure is omitted, the caster 8 uses a brake (locked) that cannot be rotated when a person sits down (to prevent movement during work).

  The seat base 2 is substantially rectangular and is formed in a rectangular box shape in plan view, and a leg column 6 is fitted to the upper end of a portion near one end in the longitudinal direction. The elevating member constituting the leg column 6 is fitted to the fixed member so as to be horizontally rotatable, and therefore the seat receiving base 2 is horizontally rotatable.

  The seat 3 has an elliptical (or rounded rectangular) wide portion 3a and a tapered portion 3b in a plan view and is close to a bicycle saddle (or close to a baseball base or a ginkgo leaf). Shape). The left and right side surfaces of the tapered portion 3b are concave surfaces 3c that are concave outward in plan view. The seat 3 has a structure in which a cushion is stretched on the upper surface of a hard substrate such as a plywood, but it is also possible to adopt a configuration of only a substrate not provided with a cushion.

  The tapered portion 3b is provided to make it easier for a person to stand and sit while facing the front support 4. Moreover, as shown in FIG. 3, the wide part 3a of the seat 3 is inclined gently so that the end part on the opposite side to the tapered part 3b becomes higher. This is to prevent the buttocks from slipping back while a person puts his / her body on the front support 4.

  The portion of the seat 3 that is close to the wide width portion 3 a is rotatably attached to a portion of the seat receiving base 2 near the other end on the opposite side of the support column 10 via a bearing member 9. Therefore, the turning center of the seat 3 is eccentric by a certain distance L from the turning center of the seat receiving base 2.

  The seat 3 can be used both in a state in which the tip portion of the tapered portion 3b is located below the front support 4 and in a state in which the tapered portion 3b is located on the side opposite to the front support 4. In this state, the person sits facing away from the front support 4, and in this case, the front support 4 can function as a backrest (the seated person can put an elbow on the elbow support 5 even in this state). , Work purpose can not be done.)

  Since the center of rotation (rotation center) of the seat 3 is eccentric with respect to the center of rotation of the seat support base 2, the seat 3 is entirely in front of the front support 4 in a plan view in a use state in which the front support 4 functions as a backrest. It sticks out, so people can sit in a stable state.

  The front support 4 is vertically long and has an upper portion and a lower portion formed in an arc shape when viewed from the front, and has an oval shape as a whole, and is attached to a cylindrical column 10 as an example of a support member. An arm 11 extending horizontally extends from the seat receiving base 2, and the column 10 is supported by a first receiving cylinder 12 in a vertical posture fixed to the tip of the arm 11. Moreover, the support | pillar 10 is provided with the 1st clamp body 13 for supporting the support | pillar 10 with the 1st receiving cylinder 12 in the state which can adjust height.

  In addition, as shown with a dashed-dotted line in FIG.1 (B), the part located below the thigh upper surface of the person who seated among the support | pillars 10 is brought close to the one (right) elbow support 5 side of the person. Is possible (the significance of which will be described later). In this case, the first receiving cylinder 12 is shifted to the side of the one elbow support 5 by bending the arm 11 as shown by a one-dot chain line in FIG.

  The front support 4 is in a slightly inclined posture in a side view. Further, the left and right lateral width of the front support 4 is set to such a size that a general adult's breast can hit. That is, the dimension is such that the second arm (upper arm) of the person who is seated is not touched. Specifically, it may be about 15 to 20 cm. The vertical length of the front support 4 is set to such a size as to straddle the chest and abdomen of a general adult. Specifically, it can be said that it may be about 25 to 35 cm.

  The elbow support 5 has an elongated shape having a longitudinal direction and a width direction in plan view. Then, the second receiving tube 14 is fitted into the support column 10 from the outside, and the elbow support 5 is attached to the front end of the branch frame 15 fixed to the second receiving tube 14 so as to be horizontally swivelable and slidable in the longitudinal direction. ing. The branch frame 15 is inclined at a slight angle so as to increase in height as it goes forward. A second clamp body 16 is fastened and fixed to the support column 10 to support the second receiving cylinder 14 so that the height thereof can be adjusted.

  The gas cylinder constituting the leg 1 freely expands and contracts, but in this embodiment, when adjusting the height of the seat 3 and the like, a pair of left and right levers 17 for releasing the lock of the gas cylinder are provided on the seat receiving seat receiving base 2. ing. This is for the convenience of the user by enabling the unlocking operation with either the left or right hand.

(2) Details Next, the details of the main part will be described based on FIG. 4 and FIG. 4A is a rear view, FIG. 4B is a sectional view taken along the line BB of FIG. 4A, FIG. 4C is a sectional view taken along the line CC of FIG. 4A, and FIGS. 5A is a plan view of the elbow support 5, and FIG. 5B is a cross-sectional view taken along line BB of FIG.

  As shown in FIG. 4B, the front support 4 has a structure in which a cushion 21 is stretched on an inner shell 20 made of resin or the like (a cross is also stretched). A support plate 22 such as a plywood is fixed to the inner shell 20, and the support plate 22 is fixed to the upper end of the support column 10 via a flanged joint 23. In this embodiment, the upper end of the column 10 is bent and the joint 23 is fitted and fixed thereto. However, the front support 4 is attached to the column 10 by a substantially L-shaped joint without bending the upper end of the column 10. Also good.

  Further, the front support 4 can be attached to the support column 10 in a state in which the angle in the side view can be freely changed. An example of this structure is shown as a modified example in FIGS. That is, (D) is a longitudinal side view, and (E) is a plan view. In this example, the joint 23 is formed of an oval pipe material and arranged in a vertically long posture, and the front side is placed on the wide side plate of the joint 23. By forming a bearing portion 23 a projecting to the opposite side of the support 4 and connecting the bearing portion 23 a to the support column 10 with a horizontal pin 24, the side view posture of the front support 4 can be changed.

  In the case of this modification, a stopper portion 10a that enters the inside of the joint 23 is provided at the upper end of the support column 10 by bending or welding, and when the front support 4 is in a vertical posture in side view, the upper inner surface of the joint 23 is the upper surface of the stopper portion 10a. When the front support 4 is tilted backward, the lower inner surface of the joint 23 is set to contact the lower surface of the tip of the stopper portion 10a. This restricts the tilting range of the front support 4. ing. Of course, the structure which enables tilting of the front support 4 and the structure which regulates the tilting range can be variously embodied.

  The first and second clamp bodies 13 and 16 have the same structure, and as shown in FIG. 4 (C), are provided with a non-annular clamping body 25 that holds the column 10, and at the tip of the clamping body 25. By changing the width of the gap with the handle 26 with bolts, it is possible to change between a locked state in which the column 10 cannot be dropped and a free state in which the column 10 can freely move up and down. Reference numeral 26a denotes a nut. The height of the support column 10 and the second receiving cylinder 14 can be adjusted by other configurations. In the present embodiment, the height of the front support 4 and the elbow support 5 can be adjusted individually.

  As shown in FIG. 5, the elbow support 5 has a structure in which a cushion 28 is stretched on a resin base material (inner shell) 27 (including a cloth), and extends downward on the lower surface of the base material 27 in the longitudinal direction. The convex portion 27a is integrally formed, and the upper long groove 29 and the lower long groove 30 of the downward opening are formed in the convex portion 27a so as to extend in the longitudinal direction of the base material 27. Further, the lower long groove A reinforcing plate 31 is fitted into 30. A long hole 32 extending in the longitudinal direction of the long grooves 29 and 30 is formed in the portion between the upper and lower long grooves 29 and 30 and the reinforcing plate 31.

  On the other hand, the distal end portion of the branch frame 15 is bent in a vertical posture, and a bush 33 is fixed to the distal end of the branch frame 15 so as not to rotate. The bush 33 is attached to the convex portion 27 a of the base material 27 in the elbow support 5. A flange 33a that overlaps from below is integrally formed (the bush 33 and the flange 33a can be separated). Further, a flanged bolt 35 is screwed into the bush 33 through a collar 34 fitted into the base 27 in the elbow support 5 and the elongated hole 32 of the reinforcing plate 31.

  The elbow support 5 is set so that a slight gap is left between the flange 35a of the bolt 35 and the bottom surface of the upper long groove 29 in the base material 27 with the bolt 35 firmly screwed. Can be slid horizontally, and can be freely rotated horizontally (turned) around the bolt 35 to take an arbitrary posture.

  Therefore, as shown in FIG. 2A, the left and right elbow supports 5 are formed in a C shape in plan view, and the left and right elbow supports 5 extend in a straight line in plan view as shown in FIG. The left and right elbow supports 5 can freely select a horizontal posture and a position as needed.

  A washer may be used instead of providing the flange 35a at the head of the bolt 35. Further, a member corresponding to the collar 34 may be formed integrally with the bolt 35. Furthermore, it is possible to interpose a resistance applying means (for example, a spring washer) that gives a slight resistance to the slide of the elbow support 5 between the bolt 35 and the base material 27. Support 5 can support a person's elbow stably. It is also possible to extend the flange 33a of the bush 33 long in the longitudinal direction of the elbow support 5 (the support strength of the elbow support 5 is improved).

(3). Summary As can be understood from the above description, a seated person can perform manual work with both elbows touching the elbow support 5 in a forward leaning posture with the chest on the front support 4. By supporting the chest and the elbow, the burden on the upper body of the person (especially the burden on the lower back) is significantly reduced, and the occurrence of disorders such as back pain can be prevented or significantly suppressed.

  In this case, since the front support 4 extends over the elbow support 5 and is vertically long, a specific part of the body does not receive a feeling of pressure, and a long work can be easily performed. In addition, since the elbow support 5 is slidable and horizontally rotatable, the posture and position of the elbow support 5 can be changed according to the difference in the physique and work contents of the person. Even if there is, it can be performed without burdening the person.

  As shown in FIG. 2 (A), the tip of the branch frame 15 is located slightly inside the line connecting adjacent casters 8. For this reason, the load applied to the elbow support 5 is always supported in the region inside the line connecting the adjacent casters 9, and as a result, the chair falls over even if a large downward load is applied to the elbow support 5. Such a problem does not occur (this is the same in the second embodiment).

(4). Outline of Second Embodiment FIGS. 6 to 13 show a second embodiment. 6 to 7 show the appearance of the whole chair, in which (A) is a rear perspective view, (B) is a side view, (C) is a rear view, and FIG. 7 is a plan view. As can be understood from FIGS. 6 and 7, the second embodiment is basically the same as the first embodiment. Hereinafter, the difference from the first embodiment will be mainly described. The same components as those in the first embodiment are denoted by the same reference numerals.

  In the present embodiment, a ring body 37 on which a person puts his / her foot is fixed to the branch foot 7 of the leg device 1. The caster 8 uses a brake that is braked (locked) when a person is seated as in the first embodiment. Further, as the leg column 6, a gas cylinder in which a lever 17 for unlocking is incorporated is used. Although only one lever 17 is provided, two left and right levers may be provided as in the first embodiment.

  Further, in this embodiment, the front support 4 is fixed to the upper end of the support column 10 as in the first embodiment, but as a difference from the first embodiment, in this embodiment, the branch frame 15 is It is fixed to the column 10 by welding. Therefore, the second receiving tube 14 and the upper clamp body 16 of the first embodiment are not provided.

  By the way, when the user is generally a man, there is no resistance to sitting on the seat 3, but when the user is a woman, there is psychological resistance to sitting on the seat 3 or wearing a skirt. In some cases, it may be difficult to sit down (whether male or female, it may be difficult to straddle the seat 3 due to obstacles such as difficulty in opening legs).

  In this regard, as shown by the one-dot chain line in FIG. 1 (B), when the part below the upper surface of the thigh of the person sitting on the column 10 is brought closer to the elbow support 5 on one side, the person aligns his feet. There is an advantage that the front support 4 and the elbow support 5 can be used while sitting down. In the example shown by the alternate long and short dash line in FIG. 1B, the upper portion of the support column 10 is bent into a crank shape, and the branch frame 15 and the front support 4 are fixed to the upper standing portion. It is also possible to fix the first receiving cylinder 12 to the leg device 1 (for example, the branch foot 7) of the support column 10. In addition, such a disposition of the column 10 can be applied to the second embodiment.

(5). Peripheral structure of seat receiving base In this embodiment, the support structure of the seat 3 and the mounting structure of the support arm 11 are different from those of the first embodiment. This point will be described with reference to FIG. 8A is a cross-sectional view taken along the line III-III of only the seat 3 in FIG. 7, and FIG. 8B is a cross-sectional view taken along the line VIII-VIII in FIG. 7 in which other members are also displayed.

  The seat support base 2 is formed in a box shape that opens upward as in the first embodiment, and the upper end of the leg support 6 is fitted to the seat support base 2. On the other hand, the seat 3 has a structure in which a cushion 39 is stretched on the upper surface of a substrate 38 such as a plywood (this is the same as in the first embodiment), and the plan view shape is a saddle shape similar to that in the first embodiment. (However, the portion opposite to the tapered portion 3a is rounder than in the first embodiment.) The peripheral edge portion of the cushion 39 of the seat 3 is a bank portion 39a having a high height at the wide width portion 3a. For this reason, the seated person can firmly attach the elbow to the elbow support 5 in a state where the buttocks are supported so as not to be able to shift backward. The height of the portions near the left and right ends of the bank 39a gradually decreases as the ends go. Due to the presence of the bank portion 39a, the user can stretch the elbow firmly to the elbow support 5 even in a state where the upper body is raised, for example.

  The upper end portion of the leg support 6 constituting the leg device 1 is fixed to the seat receiving base 2. The seat receiving base 2 is fixed to the substrate 38 of the seat 3 with screws (not shown). Therefore, in this embodiment, the planar postures of the seat 3 and the seat receiving base 2 are always constant, and the tapered portion 3b of the seat 3 always faces the support column 10.

  As shown in FIG. 8B, the support arm 11 is fixed to a hook-shaped (U-shaped) receiving member 40 that opens upward, and the base end of the receiving member 40 is located inside the seat receiving base 2. It is connected to the arranged bearing bracket 41 by a pin 42. Further, a spring receiver 43 projects downward from a portion of the seat receiving base 2 that is shifted from the leg column 6 toward the column 10, and the support arm 11 is moved from below by a spring 44 housed in the spring receiver 43. (A soft elastic body such as rubber can be used instead of the spring 44). Accordingly, the support arm 13 (and the column 10) can tilt backward within a range in which the support arm 13 (and the column 10) moves within the notch groove 45 formed in the rear end edge of the seat receiving base 2.

  In this embodiment, since the posture of the seat 3 is fixed so that the tapered portion 3b faces the column 10, the person can generally work while straddling the seat 3. It can be said that there are many. However, it is also possible to perform the work while sitting with the left and right feet aligned and brought to one side of the column 10. This is a kind of choi and a person twists his / her body and attaches both elbows to the elbow support 5. However, if the sitting time is short and the person gets in and out of the chair frequently, such use mode It is also possible. Of course, the use aspect which uses the front support 4 as a backrest similarly to 1st Embodiment can also be taken.

(6). Mounting structure of elbow support Next, the mounting structure of the elbow support 5 will be described mainly with reference to FIGS. 9 is a partial front view drawn with the left elbow support 5 as the center, FIG. 10 is a sectional view taken along the line XX of FIGS. 9 and 12A, and FIG. 11A is a structure for mounting the elbow support 5. 12A is a plan view, FIG. 12A is a cross-sectional view taken along line XII-XII of FIG. 10, and FIG. 12B is a cross-sectional view taken along line BB of FIG.

  For example, as shown in FIGS. 11 and 12A, a cylindrical body 47 opened vertically is fixed to the tip of the branch frame 15 by welding, and a rectangular and box-shaped rail bracket 48 is attached to the cylindrical body 47. Is attached through a base bracket 49 so as to be horizontally rotatable. The rail bracket 48 is made of a metal plate, and a resin cap 50 is attached to the opening end of the front end and the rear end in the longitudinal direction.

  On the other hand, the base bracket 49 has an L-shaped flat cross section having a back plate 49a and a side plate 49b, and a horizontal upper plate 49c and a lower plate 49d are integrally formed on the back plate 49a. The side plate 49b is formed in a trapezoidal shape in which the lateral width increases as it goes upward, and the overhanging dimension of the upper plate 49c is larger than the overhanging dimension of the lower plate 49d (of course, in other forms) good.).

  The rail bracket 48 and the base bracket 49 are integrated by welding so as to overlap each other in the vertical direction, and are rotatably connected to the cylinder body 47 by bolts 51 and nuts 52. The bolt 51 penetrates the lower surface plate 48a of the rail bracket 48 and the upper and lower plates 49c, 49d of the base bracket 49, and the upper surface plate 48b of the rail bracket 48 has a watermark hole 53 through which the head of the bolt 41 passes. Vacant. As shown in FIG. 9, a protective cap 54 is attached to the nut 52. However, if a cap nut is used, the cap 54 becomes unnecessary.

  The cylindrical body 47 is fitted with a flanged metal bush 51 a into which the bolt 51 is fitted. The metal bush 51a is made of a metal and has a resin layer coated on the surface thereof, and the presence of the resin layer can prevent the generation of metal sound when the elbow support 5 rotates. Also, if the entire bush is made of resin, the flange needs to have a certain thickness to ensure strength. However, since the metal bush 51 of the present embodiment is made of metal, the thickness of the flange must be reduced. There is an advantage that the strength can be secured even if the thickness is reduced.

  The rail bracket 48 is connected to the cylindrical body 47 at a portion of the rail bracket 48 that is inclined toward the longitudinal direction, and is flat between the open hole 53 and the other end surface of the upper surface plate 48b of the rail bracket 48. A long and narrow guide hole 55 is formed to extend along the longitudinal center line. It is also possible to dispose the nut 52 inside the rail bracket 48 and screw the bolt 51 into the rail bracket 48 from below. Needless to say, another connecting member (for example, a pin with a snap ring) may be employed instead of the bolt 51.

  The elbow support 5 is provided with a resin base material 27 as in the first embodiment, and the upper surface of the cushion 28 is loosely recessed in a state of opening upward in a cross sectional view (the cushion 28 is insert-molded on the base material). Or may be bonded or fitted). The base member 27 is formed with a pair of holding portions 56 that are in close contact with the longitudinal side surface of the rail bracket 48 so as to extend in the longitudinal direction. The lower end of the holding portion 56 is integrally formed with a collar portion 56a that is held so as not to be able to be lifted upward. Therefore, the elbow support 5 can slide along its longitudinal direction. Further, a stopper projection 57 that fits into the guide hole 55 of the rail bracket 48 is provided on the bottom surface portion of the base material 27.

  The stopper projection 57 is formed at the tip of an elongated beam-shaped portion 59 formed by providing a U-shaped slit 58 on the bottom surface portion of the base material 27, and the beam shape is the lower end of the stopper projection 57. An inclined surface 57a is formed on the side of the portion 59 opposite to the base. For this reason, the stopper projection 57 can be fitted into the guide hole 55 of the rail bracket 48 by utilizing the fact that the beam-like portion 59 is bent upward and deformed. Therefore, the elbow support 5 is attached to the rail bracket 48 by a one-touch operation in which the elbow support 5 is pushed in a state of being overlapped with the rail bracket 48.

  In addition, an auxiliary hole 60 that overlaps with the end of the guide hole 55 in a plan view is vacated in a portion of the lower surface plate 48a of the rail bracket 48 opposite to the cylindrical body 47. Then, by pushing up the stopper projection 57 from the auxiliary hole 60 with a screwdriver or the like, the stopper projection 57 can be removed from the guide hole 55 and the elbow support 5 can be removed from the rail bracket 48. The stopper projection 57 is an example of a stroke regulating means, and the stroke by which the elbow support 5 slides in the longitudinal direction by the stopper projection 57 is described.

  Note that the stopper protrusion 57 can be configured separately from the base material 27. For example, a screw may be used as the stopper protrusion 57 and screwed into the bottom surface of the base material 27 from the auxiliary hole 60 and fixed. It is also possible to form a long groove on the bottom surface of the substrate 27 and fit a projection (for example, a screw) provided on the rail bracket 48 into the long groove.

(7). Front Support Mounting Structure Next, the front support 4 mounting structure will be described with reference to FIG. 13A is a rear view, FIG. 13B is a sectional view taken along line B-B in FIG. 13A, and FIG. 13C is a rear view showing the arrangement of screw holes in the front support 4.

  In the present embodiment, the front support 4 has a structure in which a cushion 21 is stretched on a support plate (substrate) 22 such as a plywood, and a bracket plate 63 fixed to the upper end of the support column 10 via a contact plate 62 with a screw 64. It is fixed to the support plate 22. Accordingly, the front support 4 is fixed.

  The support plate 22 is fixed to the bracket plate 63 with six screws 64, but the vertically long screw holes 65 for fixing the bracket plate 63 to the support plate 22 with the front support 4 in the vertically long posture. And six horizontally oriented screw holes 66 that can fix the bracket plate 63 with the front support 4 in the landscape orientation. Therefore, the user can change the mounting posture of the front support 4 to a vertically long landscape according to his / her preference.

  As the screw hole 65, a wood screw type screw 64 may be screwed into it as a mere pilot hole, or a screw hole 65 may be formed with a demon nut and screw with no self-piercing property may be screwed into it. .

(8) Summary of Second Embodiment The elbow support 5 according to the present embodiment is not necessarily rotated, but as can be understood from FIG. 10, when the left elbow support 5 is taken as an example, the side plate of the base bracket 49 is used. When 49b hits the back surface of the branch frame 15, the clockwise rotation is restricted, and the elbow support 5 cannot be rotated further clockwise from the reference posture extending substantially parallel to the branch frame 15 in plan view. On the other hand, when the back plate 49a of the base bracket 49 hits the front surface of the branch frame 15, rotation in the counterclockwise direction is restricted. In other words, the left and right elbow supports 5 can only be rotated outward only up to a reverse C-shaped posture in plan view with reference to a posture extending linearly in plan view.

  As described above, there is a limit to the posture in which a normal person can turn his arm horizontally with his elbows bent, and he can only turn about 100 degrees. The elbow support 5 according to the present embodiment conforms to the movable range of the human arm, and therefore, the elbow support 5 does not rotate outwardly due to some kind of bounce and hurts the elbow. It can be said that the range in which the elbow support 5 can be rotated horizontally is preferably about 90 to 110 ° from the reference state.

  In addition, for example, when a person who is sleeping on a bed is approaching a caregiver, if the elbow support 5 is in a forward posture, the caregiver is difficult to bring the body (face) close to the cared person, but if the elbow support 5 is in a sideways posture, the caregiver Can greatly expand the elbow left and right and bend forward to bring the face closer to the cared person, thus contributing to improved communication between the carer and the cared person. In addition, when the elbow support 5 is facing forward and backward, the elbow support 5 may approach the cared person's face, which may cause anxiety to the cared person. There is also an advantage that the caregiver's anxiety can be eliminated.

  In addition, when the elbow support 5 is in a horizontally long posture substantially parallel to the branch frame 15, the elbow is often placed on the middle of the left and right sides of the elbow support 5. In this case, depending on the work content, the elbow support 5 is on the front side. In this embodiment, the side plate 49b of the base bracket 49 hits the branch frame 15 to prevent the elbow support 5 from rotating. You can apply your strength to your arms with confidence.

  Also in this embodiment, the end of the branch frame 15 is located slightly inside the line connecting the adjacent casters 8. For this reason, similarly to the first embodiment, even if a large downward load is applied to the elbow support 5, there is no problem that the chair falls.

  In addition, when the form which hold | maintains the rail bracket 48 with the base material 27 of the elbow support 5 like this embodiment is employ | adopted as a slide permission means of the elbow support 5, the width dimension in which the base material 27 and the rail bracket 48 fit, Since the length dimension can be increased, the elbow support 5 has an advantage of ensuring high stability while ensuring a large slide stroke (support strength for the elbow support 5 can be improved). In addition, it is preferable to employ a configuration in which the support column 4 can be tilted backward at a slight angle as in the present embodiment, since a locking function with respect to the upper body is exhibited, so that the burden on the body can be reduced.

(9). Third to sixth embodiments (FIGS. 13 to 14)
14 and 15 show another example for changing the front support 4 between a vertically long posture and a horizontally long posture. Among these, in the third embodiment shown in FIG. 14, the bracket plate 63 is formed in a square shape, and the screws 64 and the screw holes 67 are arranged at equal intervals in the vertical and horizontal directions and symmetrically in the vertical and horizontal directions. In this embodiment, the posture of the front support 4 can be changed vertically and horizontally using the common screw hole 67. Three or more screw holes 67 may be arranged vertically and horizontally at equal intervals and vertically and horizontally.

  In the fourth embodiment shown in FIG. 15, three arc-shaped elongated holes 68 extending concentrically at an angle of 90 ° around the axis of the support column 4 are formed in the bracket plate 63 at equal intervals. Two screw holes 67 communicating with the ends of the long holes 68 are formed. In this embodiment, the screw 64 is screwed into only one of the two screw holes 67, so that the screw 64 is loosened and then the front support 4 is rotated to retighten the screw 64. 4 postures can be changed.

  One of the pair of screws 64 is screwed into the screw hole 67 and only the other is removed or re-screwed so that the front support 4 is always fixed to the bracket plate 63 with the three pairs of screws 64. Is also possible.

  In the fifth embodiment shown in FIG. 14, the left and right side surfaces of the tapered portion 3 b in the seat 3 are formed linearly in plan view. Accordingly, the seat 3 has a shape closer to the base seat receiving base for baseball.

  In the sixth embodiment shown in FIG. 15, the left and right elbow supports 5 are formed in a circular shape in plan view. FIG. 15B is a cross-sectional view taken along the line B-B of FIG. 15A, and as shown in FIG. 15, the elbow support 5 is recessed upward with a gentle curvature. And while fixing the spherical bearing 70 to the front-end | tip of the branch frame 15, the semicircular recess 71 which fits only half of the spherical bearing 70 is formed in the base material 27 in the elbow support 5, and furthermore, the spherical bearing 70 is applied to the spherical bearing 70 from below. A ring-shaped stopper body 72 that is partially fitted is fixed to the base material 27 with screws.

  Therefore, in the sixth embodiment, the elbow support 5 can be swiveled horizontally around its central portion and can be freely tilted (the tilting range is regulated by the stopper body 72 hitting the root of the spherical bearing 70). .) It can be said that it is preferable to configure as in the present embodiment as in the case where the operator moves the lower eyelid up and down greatly during the work.

(Ten). Others The present invention can be embodied in various ways other than the above embodiment. For example, the seat may be formed in a circular shape in plan view, an elliptical shape in plan view, or a substantially triangular shape in plan view. Further, the shape of the front support is not limited, and for example, it may be formed in a circular or triangular shape, or an inverted convex shape in which an upward projection that hits the chest protrudes from a horizontally long portion that hits the belly. Similarly, the planar shape of the elbow support can be designed in any form as required.

  Further, the chair according to the present invention does not need to be movable, and can be applied to, for example, a fixed type installed in an assembly line. It is also possible to use a gas cylinder as a support member for attaching the front support and the elbow support. Similarly, the support member for the front support is not limited to using a support made of a pipe material or a bar material, and various members (frame material) such as a channel material can also be used. It can also be said that the front support and the elbow support are attached to different struts, and the left and right elbow supports are attached to separate elbow supports.

  Although not deviated from the claims, it is possible to provide only a front support or only an elbow support for a chair for manual work.

It is the perspective view and front view of 1st Embodiment. It is a top view of a 1st embodiment. It is a side view of 2nd Embodiment. It is a figure which shows the detail of a front support. It is a figure which shows the detail of an elbow support. It is a figure which shows 2nd Embodiment, (A) is a perspective view from back, (B) is a side view, (C) is a rear view. It is a top view. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7. It is the partial front view drawn focusing on the left elbow support. FIG. 13 is a cross-sectional view taken along line XX in FIGS. 9 and 12A. (A) is the isolation | separation perspective view which shows the structure of attachment of an elbow support, (B) is a top view. (A) is a sectional view taken along line XII-XII in FIG. 10, and (B) is a sectional view taken along line BB in (A). (A) The rear view of a front support, (B) is a BB sectional view of (A), (C) is a rear view which shows arrangement | positioning of the screw hole in a front support. It is a figure which shows 3rd Embodiment. It is a figure which shows 4th Embodiment. It is a figure which shows 5th Embodiment. It is a figure which shows 6th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leg 2 Seat receiving base 3 Seat 4 Front support 5 Elbow support 10 Post as an example of a support member 11 Support arm 15 Branch frame

Claims (4)

A seat on which a person sits, a front support on which a person who sits down can touch the chest, and an elbow support on which the seated person can put an elbow in a state where the chest is placed on the front support, the front support is an elbow support It is arranged in a state spreading on both the upper and lower sides of the
Chair. A seat on which a person sits, a front support on which a seated person can touch the chest or the abdomen, or both, and a pair of left and right elbow supports on which the seated person can put an elbow with the chest or the stomach on the front support The elbow support is attached to the support member in a state where at least one of the posture in plan view, the position in plan view and the posture in side view can be changed,
Chair. The front support includes a seat on which a person sits, a front support on which a seated person can hit the chest, and a pair of left and right elbow supports on which the seated person can put an elbow with the upper body in contact with the front support. While the elbow support is formed to spread on both the upper and lower sides,
The left and right elbow supports are attached to the support member in a state where at least one of a posture in plan view, a position in plan view, and a posture in side view can be changed,
Chair. The seat support base further supports the seat, and the front support is attached to a support post fixed to the seat support base, while the elbow support is attached to a branch frame branched from the support post. In addition, the elbow support is separated into right and left and has an elongated shape in plan view so that the human elbow can be placed in a stable state. The elbow support is moved in the longitudinal direction. It is attached to the branch frame in a freely and horizontally rotatable state.
The chair as described in any one of Claims 1-3.

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