JP2008061918A - Cross bar member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cross bar member by which seat width of a wheelchair provided in a hospital etc. may be easily adjusted matching a patient and seat width of a wheelchair in use is easily adjusted matching growth, fatness, or slimness. <P>SOLUTION: The cross bar member 100 is composed of an inner pipe 18 and an outer pipe 19 of the cross bar 17 and a connection member 22 to connect the cross par 17 and a connection support member 23. Bolt holes 21 are bored respectively in a first fixing part 24, a second fixing part 25, and a third fixing part 26 in the inner and outer pipes 18, 19. On one end of the outer pipe 19, an axially attaching part 20 by which the outer pipe 19 is pivotally attached on a lower frame of a wheel chair 10 is set. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crossbar member that is attached between the left and right main wheels of a wheelchair to enable the wheelchair to be folded. More specifically, the present invention relates to a crossbar member that not only allows the wheelchair to be folded but also adjusts the seating width of the wheelchair.

  As wheelchair users grow, wheelchair seats may become unsuitable. In addition, wheelchairs provided in hospitals or the like need to adjust the seat width according to the patient. If the seat width does not match, you will not be able to sit down in a wheelchair, and it will be difficult and difficult to operate. Therefore, a wheelchair that can easily adjust the seating width of the wheelchair is desirable, and various attempts have been made for that purpose.

  The seat width variable wheelchair of Patent Literature 1 relates to a wheelchair including a crossbar assembly including a pair of crossbars rotatably connected to a main frame at a lower side. A sliding guide member provided at the cross connecting portion of the cross bar, an upper and lower cross bar portion guided by the sliding guide member, a cam shaft serving as a cross bar cross rotation center axis, and the cam shaft integrated with each other And a cam plate for determining the amount of advancement of the upper and lower crossbar portions. The transmission fixing means connects the cam plate and the upper and lower crossbar portions, transmits the rotation amount of the cam plate to the upper and lower crossbar portions, and adjusts to fix the cam and the crossbar.

  To change the seat width of Patent Document 1, a cam plate is attached to the center of the cross bar, and the width of the cross bar is adjusted along a groove formed in the cam plate. The range for changing the seat width is limited to the radius of rotation of the cam plate.

  The wheelchair of Patent Document 2 includes a main frame and a seat frame. The seat frame includes a cross member. Each cross member varies in distance between its ends. The cross member is connected by the rotation center in the center part. Both rotate relatively. Each cross member has a cylindrical member and a slide member, and the slide member slides relative to the cylindrical member. This slide is regulated and allowed by attaching and detaching the fixed shaft. A link member is connected to the cross member.

  The adjustment of the seat width by the cross member of Patent Document 2 employs a method in which a long groove adjusting hole is provided in the middle of the cross member and the length of the cross bar is adjusted while shifting the long groove. In this method, when the weight is applied to the seat portion, there is a possibility that the seat portion is shifted between the long grooves of the adjustment holes. In order to prevent this, a link member is essential.

  The foldable wheelchair of Patent Document 3 includes a pair of foldable front and rear crossbars that are rotatably connected via a central cross connecting portion, and is urged to apply tension to the crossbar in the folding direction. Means. The biasing means shall be a pair of coil ridges stretched in a crossing manner between the crossbars below the crossbar connecting portion of the crossbar, and the biasing means shall be provided above the crossbar crossing connecting portion. At least a pair of links that can be rotated at the position of the central knob hung between the crossbars so as to maintain the expanded state of the crossbar against the tension in the folding direction by the biasing means A rotating lever type locking mechanism is provided.

  In order to apply tension in the folding direction, the crossbar of Patent Document 3 is provided with length changing means on the cross connecting portion. Therefore, when the width is changed, the height of the seat portion changes.

As described above, various shapes of crossbars for changing the seat width of a wheelchair have been disclosed. However, there is a demand for an easy-to-handle crossbar that can easily change the seat width and can be firmly maintained.
JP 2002-85467 A JP 2004-49679 A JP 2004-159969 A

  The present invention easily adjusts the seat width of a wheelchair installed in a hospital or the like according to the patient, adjusts the seat width according to the growth of the wheelchair being used, or according to obesity or slimming A crossbar member is provided.

  The crossbar member capable of easily adjusting the seat width of the wheelchair of the present invention is a crossbar whose inner bar and outer pipe are crossbars, and the length can be adjusted by sliding the inner pipe within the outer pipe. A bar. When adjusting the length (seat width) of the crossbar and fixing it, align the bolt hole drilled at any position with the fixed part of the inner pipe and outer pipe, and fix it with bolts, It was set as the structure which can be adjusted to a desired seat width.

  The present invention includes an outer pipe of a crossbar having a pivoting portion pivotally attached to a lower frame of a wheelchair, an inner pipe inserted into the outer pipe, and the inner pipe being slid within the outer pipe. A crossbar member comprising: a crossbar capable of adjusting the length; a connection auxiliary member having a shaft attachment portion rotatably attached to the upper frame; and a connection member connecting the connection auxiliary member and the crossbar. A first fixing part having a plurality of holes in the crossbar; a second fixing part having a plurality of holes apart from the first fixing part; and a third fixing part, wherein the first fixing part is bolted By fixing, the position of the hole of the said 2nd fixing | fixed part which has a some hole, and the said 3rd fixing | fixed part is determined, It is a crossbar member characterized by the above-mentioned.

  Adjust the length by sliding the inner pipe inside the outer pipe of the crossbar, and fix it with bolts at the position of any hole of the first fixing part, the bolt holes of the second fixing part and the third fixing part are determined By fixing the bolts in the bolt holes of the second fixing part and the third fixing part with bolts, the length of the crossbar can be adjusted to easily adjust the seat width of the wheelchair.

  According to another aspect of the present invention, the number of the plurality of holes formed in the first fixing portion, the second fixing portion, and the third fixing portion is at least two to five. It is a crossbar member of description.

  The number of bolt holes drilled in the fixing portion of the crossbar is not particularly limited, but if the number of bolt holes is too large, the strength of the pipe is impaired. Considering the time and effort for adjusting the length of the crossbar, it is preferable that 2 to 5 holes of bolts to be drilled for adjusting the seat width are drilled at an appropriate interval.

  By fixing the bolt hole of the first fixing portion at an arbitrary position, the positions of the holes of the second fixing portion and the third fixing portion in which the plurality of bolt holes are drilled are naturally determined, and the bolt is passed through the bolt hole. Can be fixed easily. By adjusting the length of the crossbar, the seat width of the wheelchair can be easily adjusted.

  FIG. 1 shows a wheelchair 10 equipped with a crossbar member 100 of the present invention. The wheelchair 10 is provided with a caster 13 that can be rotated to the left and right at the front, and a main wheel 14 on the left and right. Between them, a seat portion 15 and a backrest portion 16 are attached, and a user can sit on the seat. Under this seat part 15, the cross bar 17 is mounted so as to connect both sides of the upper frame 11 and the lower frame. The cross bar 17 is composed of an outer pipe and an inner pipe, and is installed for easily folding or expanding the wheelchair 10, but also has an effect of maintaining the strength of the wheelchair. .

  FIG. 2 shows a lower back portion of the wheelchair 10 equipped with the crossbar member 100 of the present invention. A pivoting portion 20 at one end of the cross bar 17 is pivotally mounted on the lower frame 12, and the other end of the cross bar 17 is pivotable by using the connection member 22 and the connection auxiliary member 23 on the upper frame 11. It is attached to.

  FIG. 3 shows the respective parts of the crossbar member 100 of the present invention. The crossbar member 100 of the present invention includes an inner pipe 18 and an outer pipe 19 of the crossbar 17, a connection member 22 that connects the crossbar 17, and a connection auxiliary member 23. One bolt hole 21 for the first fixing portion 24 is formed in the inner pipe 18 of the cross bar 17, and five bolt holes 21 are formed in the second fixing portion 25 and the third fixing portion 26, respectively. At one end of the outer pipe 19 of the cross bar 17, a shaft mounting portion 20 that is rotatably mounted on the lower frame 12 of the wheelchair 10 is mounted. The first fixing portion 24 is closer to the shaft mounting portion 20, and five bolt holes 21 are formed in the first fixing portion 24 at intervals, and the second fixing portion 25 and the third fixing hole 24 are formed toward the other end. A fixing portion 26 was provided, and five bolt holes 21 were formed in the same manner as the inner pipe 18. The method of fixing the cross bar to the upper frame 11 of the wheelchair 10 is to connect the bolt hole 21a of the connection auxiliary member 23 pivotally mounted on the upper frame 11 to the bolt hole 21b of the connection member 22, The bolt holes 21c of 22 and the bolt holes 21 of the third fixing portion 26 of the crossbar are fixed with bolts.

  FIG. 4 shows the second fixing portion 25 and the second fixing portion 25 when the inner pipe 18 of the cross bar 17 is inserted into the outer pipe 19 of the cross bar 17 and fixed to the bolt hole 21 of the first fixing portion 24 with a bolt (●). 3 shows the position of the bolt hole 21 (●) of the fixing portion 26. As shown in FIGS. 4A, 4 </ b> B, 4 </ b> C, 4 </ b> D, and 4 </ b> E, the fixing positions of the first fixing portion 24 determine the fixing positions of the second fixing portion 25 and the third fixing portion 26. When the bolt holes 21 are fixed with bolts, the length of the cross bar 17 is adjusted and fixed, and it is not necessary to search for the bolt holes 21 of the second fixing portion 25 and the third fixing portion 26, and the seat width of the wheelchair 10 is increased. Easy to adjust.

  As shown in FIGS. 5A to 5B, the width of the cross bar 17, the cross bar 17 can be adjusted to various lengths as shown in FIGS. FIG. 5A shows an example in which the cross bar 17 is fixed at the lowest bolt hole 21 of the first fixing portion 24 formed in the cross bar 17 and the cross bar 17 is in the shortest state. Next, an example in which the fixing position of the first fixing portion 24 is raised to FIGS. 5B, 5C, and 5D is shown. When the fixing position of the first fixing portion 24 is raised, the crossbar 17 becomes longer sequentially. It shows a state of becoming. The crossbar member 100 is pivotally attached to the upper frame 11 and the lower frame 12 of the wheelchair 10, and the position where the inner pipe 18 of the crossbar 17 is slid and fixed in the outer pipe 19 as described above is changed. Thus, the width of the wheelchair can be easily adjusted by adjusting the length of the crossbar 17.

It is a perspective view of the wheelchair which installed the crossbar member. It is a perspective view of the back surface part which installed the crossbar member in the wheelchair. It is a front view of each component of a crossbar member. It is the front view which changed and combined the length of the crossbar member. It is a front view of the crossbar member assembled by changing the length.

Explanation of symbols

100: Crossbar member 10: Wheelchair 11: Upper frame 12: Lower frame 13: Caster 14: Main wheel 15: Seat part 16: Backrest part 17: Crossbar 18: Inner pipe 19: Outer pipe 20: Axis part 21: Bolt hole 22: connecting member 23: connection auxiliary member 24: first fixing portion 25: second fixing portion 26: third fixing portion

Claims (2)

Adjusting the length by inserting an outer pipe of a crossbar having a shaft mounting portion pivotably mounted on a lower frame of a wheelchair, and inserting the inner pipe into the outer pipe and sliding the inner pipe within the outer pipe A crossbar member comprising: a crossbar capable of rotating, a connection auxiliary member having a pivot attachment portion pivotally attached to the upper frame, and a connection member connecting the connection auxiliary member and the crossbar. A first fixing portion having a plurality of holes, a second fixing portion having a plurality of holes apart from the first fixing portion, and a third fixing portion, and fixing the first fixing portion with a bolt The crossbar member is characterized in that the positions of the holes of the second fixing portion and the third fixing portion having a plurality of holes are determined. The crossbar member according to claim 1, wherein the number of the plurality of holes formed in the first fixing portion, the second fixing portion, and the third fixing portion is at least two to five.

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