JP6532216B2 - Grip mounting structure - Google Patents

Description

  The present invention relates to a mounting structure of a grip attached to a grip mounting frame disposed on a frame of a wheelchair.

  Conventionally, it is well known that, even in a self-propelled wheelchair as well as in a nursing care wheelchair, when a helper moves the wheelchair, it holds a pair of left and right grips respectively. More specifically, the body frame of the wheelchair is made of a metal pipe, and the grips are respectively attached to a pair of left and right grip attachment frames which are projected rearward from the body frame. The grip is fixed to the grip mounting frame via an adhesive, a screw or the like, so that the grip can not be easily pulled out. In particular, in the case of the rental specification, in order to facilitate replacement of the grip for maintenance, it is generally fixed by using a screw so as to be removable.

  For example, in Patent Document 1, a compression / expansion portion is disposed at the rear end portion in the grip, and the head portion of a bolt having the shaft portion inserted through the hollow portion of the compression / expansion portion is seated. In the above, there is disclosed a grip attachment structure for a wheelchair having a collared nut which is screwed to the bolt.

Unexamined-Japanese-Patent No. 2010-5210

  However, when the assistant grips the grip, the grip may be twisted or rotated in the circumferential direction by strongly grasping the grip when changing or stopping the direction of the wheelchair. . For this reason, there has been a problem that the grip comes into play due to long-term use, and the operability of the wheelchair decreases. Here, the inventor has reached the following findings. That is, although the area around the screwed portion etc. is prevented from rattling as described above, the rear end of the grip that the assistant actually grips is very likely to be distorted, and the fixing strength Is likely to be inadequate. In particular, when the grip is formed of an elastic material that can be easily grasped, the above problem tends to be noticeable.

  In addition, in the above grip, there is also provided a structure having an uneven shape in accordance with the shape of a hand to be held, and there is a wheelchair in which such a grip is mounted symmetrically. When the grips are twisted in the circumferential direction and deviated from the fixed position, there is also a problem that the arrangement of the pair of left and right grips becomes asymmetrical to lower the operability and to deteriorate the appearance.

  Therefore, the present invention provides a grip attachment structure in which the operability of the wheelchair and the external shape are satisfactorily secured without the position of the grip rotating and shifting even if a twisting force is applied to the grip. The purpose is to

The present invention is an attachment structure of a bottomed cylindrical grip attached to an end of a grip attachment frame which is projected rearward in a pair of left and right in a body frame of a wheelchair, and the grip comprises A hole is formed in which the end of the grip attachment frame is inserted in a state of being attached to the grip attachment frame , and a recess is formed in the grip attachment frame , and the recess is entirely formed. The grip attachment frame has a hole shape that is cut forward from the edge of the grip attachment frame, while the inner surface of the hole of the grip corresponding to the grip attachment frame has a convex that fits into the recess protrusions stage shape is integrally molded, the protrusion is most far become the bottom and is formed to be continuous, convex portions in a state where the convex portion is fitted into the recess of the grip Sandwiched inner peripheral surface of the recess in the axial direction around at least the grip mounting frame, are consistent in contact with the abutment portion of the recess, and the bottom abuts the end edge of the frame for the grip mounting Further, the outer surface of the grip is provided with a collar portion for facilitating gripping, and in a state where the grip is attached to the grip mounting frame, the left and right grips have a symmetrical structure with each other. The grip mounting structure is characterized in that the left and right grips are mounted symmetrically in the left-right direction without each grip being twisted around the axis and being rotated .

  In the above configuration, since the concave portion and the convex portion are fitted to each other, the twist or rotation of the grip is suppressed even if the assistant strongly grips the grip. Here, since the convex portion is held by the inner peripheral surface of the concave portion around the axis of the grip attachment frame, the grip is prevented from being loosely rotated around the axis. Therefore, it is possible to prevent the operability of the wheelchair from being lowered due to the grip being gripped by long-term use. In addition, by preventing the rotation of the grips, the symmetrical arrangement of the left and right grips is properly secured, so that it is not difficult to grip and the appearance does not deteriorate.

  The grip attachment frame is provided with fixing means for immovably fixing the grip and the grip attachment frame in a state where the grip attachment frame is inserted into the hole of the grip. Preferably, the recess is formed at the rear end of the grip attachment frame behind the fixing means, and the protrusion is formed at the bottom of the hole of the grip corresponding to the rear end. .

  As described above, the grip is fixed by the fixing means so as not to be removed, and the concave portion and the convex portion are fitted at a position behind the fixing means. Twisting or rotation of the vicinity of the end is suppressed. Moreover, in such a configuration, for example, it is relatively easy to provide a recess by pressing, for example, on a grip attachment frame made of a pipe material. In addition, for a grip made of an elastic material such as a plastic material, for example, it is relatively easy to provide a projection during molding. Therefore, such a configuration has the advantage of facilitating the manufacture of the body frame of the wheelchair. In addition, it becomes possible to prevent the twist in the rear-end part of a grip still more effectively by providing a convex part in the bottom part of the hole of a grip.

  Furthermore, it is preferable that a guide groove portion through which the convex portion passes when the grip is attached to and detached from the grip mounting frame is formed in the concave portion.

  With this configuration, at the time of maintenance in which the grip is attached to or detached from the grip attachment frame, there is an advantage that the attaching and detaching operation is facilitated by the guiding action of the guide groove portion.

  According to the grip mounting structure of the present invention, since twisting and rotation of the grip are prevented, the excellent effect is obtained that the rattling of the grip is suppressed and the operability of the wheelchair and the appearance of the grip are favorably maintained. is there.

It is a perspective view which shows the attachment structure of the grip concerning an Example. The frame for grip attachment concerning an Example is shown, (a) is a partial notch side view, (b) is a partial bottom view. The grip concerning an Example is shown, (a) is a cross-sectional view, (b) is a front view, (c) is a longitudinal cross-sectional view. It is explanatory drawing which shows the assembly | attachment aspect of the grip concerning an Example. The state which attached the grip concerning the Example to the flame | frame for grip attachment is shown, (a) is a fragmentary sectional view, (b) is a fragmentary cross-sectional view which expands and shows a rear-end part periphery. It is a fragmentary sectional view showing other examples.

  Hereinafter, an embodiment in which the grip attachment structure in a wheelchair according to the present invention is embodied will be described in detail. In addition, this invention is not limited to the Example shown below, A design change is possible suitably.

  As shown in FIG. 1, the grip mounting structure 1 (hereinafter referred to as the grip mounting structure 1) includes a grip mounting frame 2 and a grip 3. The grip mounting structure 1 shown in FIG. 1 is a structure applied to the grip 3 for holding the left hand, and a structure applied to the grip for holding the right hand is symmetrical to each other, and therefore the detailed description is omitted.

  As shown in FIG. 2a, the grip attachment frame 2 is formed of a metal pipe, and a pair of left and right members are projected rearward in a body frame (not shown) of the wheelchair. Further, a screw hole 21 is provided in a penetrating manner in the pipe wall of the grip attachment frame 2 so that a fixing screw 41 described later can be screwed. Further, a concave portion 23 is formed on the lower side surface of the rear end portion 22 of the grip attachment frame 2 which is located rearward of the screw hole 21. More specifically, as shown in FIG. 2b, the recess 23 generally has a hole shape which is cut forward from the edge of the grip attachment frame 2, and the rear end of the recess 23 is The guide groove 24 is formed such that the width of the hole increases toward the rear end. The recess 23 can be formed, for example, by pressing.

  As shown in FIG. 3, the grip 3 is a molded processed product of an elastic plastic material, and includes a grip body 31 with a bottomed cylindrical shape. Further, a hole 34 into which the end of the grip mounting frame 2 is inserted is formed at the center of the grip body 31 along the longitudinal direction of the grip body 31. Here, on the inner surface portion 35 of the bottom portion which is the deepest in the hole portion 34, a convex portion 36 having a convex step shape is integrally formed. The dimension and shape of the projection 36 correspond to the dimension and shape of the recess 23 in the grip mounting frame 2. Further, on the inner peripheral surface of the hole 34, a plurality of ridges 37 that contact the outer peripheral surface of the grip mounting frame 2 are provided. Further, at the front end of the grip body 31, a fixing screw insertion hole 38 is provided in a penetrating manner. The convex portion 36 is integrally molded at the time of molding.

  Further, the outer circumferential surface of the grip 3 is provided with a concavo-convex portion 32 and a collar portion 33 which facilitate gripping.

  The grip 3 described above is mounted to the grip mounting frame 2 in the following manner.

  As shown in FIGS. 4 and 5a, the end of the grip mounting frame 2 is inserted into the hole 34 of the grip 3, and the fixing screw insertion holes 38 of the grip 3 and the screw holes 21 of the grip mounting frame 2 are Match. At the same time, the projection 36 of the grip 3 is fitted into the recess 23 of the grip mounting frame 2. At this time, as shown in FIG. 5 b, the convex portion 36 receives the guiding action of the guide groove portion 24 of the concave portion 23, passes through the guide groove portion 24 and abuts on the butting portion of the concave portion 23 to be matched. Then, in such a state, the convex portion 36 is held by the inner peripheral surface 23A of the concave portion 23 in the direction around the axis of the grip attachment frame 2 (see the arrow in FIG. 5b).

  Then, the fixing screw 41 as a fixing means is inserted into the fixing screw insertion hole 38 of the grip 3 and screwed into the screw hole 21 of the grip mounting frame 2 to complete the mounting operation of the grip 3. .

  In such a state, as described above, the lateral width of the convex portion 36 is determined by the inner peripheral surface 23A of the concave portion 23 so as to be held in the direction around the axis of the grip attachment frame. The rear end portion does not twist and rotate around the axis with respect to the grip mounting frame 2. Therefore, since rotation of the grip 3 is prevented at two front and back positions of the fixing screw 41 and the convex portion 36, the grip 3 is not loose and operability of the wheelchair is not deteriorated, and the left and right pair The appearance of the grips 3 and 3 does not deteriorate.

  When replacing the grip 3 at the time of maintenance work, after removing the fixing screw 41, the grip 3 may be removed from the grip mounting frame 2. At this time, the convex portion 36 of the grip 3 passes through the guide groove portion 24 of the concave portion 23 of the grip attachment frame 2 and is detached from the concave portion 23.

  In the configuration described above, the dimensions and shapes of the recess 23 and the protrusion 36 are not particularly limited. For example, the recess 23 and the protrusion 36 may have a circular shape, an elliptical shape, an elongated groove shape, or a polygonal shape. The recess 23 and the protrusion 36 may be singular or plural. For example, a plurality of concave portions 23 and convex portions 36 may be intermittently provided along the circumferential direction of the grip attachment frame 2 and the grip 3. Further, the guide groove 24 may not be formed in the recess 23. Further, the recess 23 does not necessarily have to be provided at the end of the grip attachment frame 2 in the shape of a notch, and may be provided at a required portion of the rear end of the grip attachment frame 2. Further, asperities may be formed around the fixing screw insertion holes 38 and the screw holes 21 into which the fixing screws 41 are inserted, and they may be engaged with each other when the grip 3 is mounted. The fixing means is not limited to the fixing screw 41, and may be, for example, an adhesive. Further, for example, the projection 36 may be provided on the grip attachment frame 2, and the recess 23 may be provided in the hole 34 of the grip 3.

  For example, as shown in FIG. 6a, a convex portion 36 may be provided at the tip end of the grip 3 and a hole-like concave portion 23 may be provided in the grip attachment frame 2 at a position corresponding to the convex portion 36. In this case, it is desirable to fix the grip mounting frame 2 and the grip 3 in combination with an adhesive. On the other hand, as shown in FIG. 6 b, a recess 23 may be provided at the tip of the grip 3, and a projection 36 may be provided on the grip attachment frame 2 at a position corresponding to the recess 23. Moreover, it is also possible to combine suitably the structure of the recessed part 23 shown in FIG. 6, and the convex part 36, and the structure of the recessed part 23 shown in FIG.

1 grip mounting structure 2 grip mounting frame 3 grip 22 rear end 23 recess 24 guide groove 34 hole 35 inner surface 36 protrusion 41 fixing screw (fixing means)

Claims (3)

It is a mounting structure of a bottomed cylindrical grip attached to an end of a grip mounting frame which is projected rearward in a pair of left and right in a body frame of a wheelchair,
The grip is formed with a hole into which the end of the grip attachment frame is inserted in a state of being attached to the grip attachment frame,
In addition, the the grip mounting frame, recess is formed, the recess is in the form from the edge of the grip mounting frame as a whole-away all pore shape forward,
On the other hand, on the inner surface of the hole of the grip corresponding to the grip attachment frame, a convex stepped portion fitted into the concave portion is integrally formed , and the convex portion is the bottom of the grip at the deepest end. It is formed to be continuous with the
In a state in which the convex portion is fitted into the concave portion, the convex portion is nipped by the inner peripheral surface of the concave portion at least in the circumferential direction of the grip attachment frame, and abuts against the butting portion of the concave portion And the bottom portion abuts on an edge of the grip mounting frame,
Furthermore, the outer surface of the grip is provided with a collar portion for facilitating gripping, and in a state where the grip is attached to the grip mounting frame, the left and right grips are symmetrical with each other, A grip mounting structure characterized in that a pair of left and right grips are mounted in left-right symmetry without twisting and rotating the grip around an axis . A fixing means for immovably fixing the grip and the grip mounting frame to each other when the grip mounting frame is inserted into the hole of the grip;
In the grip mounting frame, the concave portion is formed at the rear end of the grip mounting frame which is located rearward of the fixing means, and the convex portion is formed at the bottom of the hole of the grip corresponding to the rear end. The grip mounting structure according to claim 1. The grip mounting structure according to claim 1 or 2, wherein the concave portion is provided with a guide groove portion through which the convex portion passes when the grip is attached to and detached from the grip mounting frame.

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