Member fastening structure and attachment tool

Abstract

To provide a member fastening structure which can maintain rigidity while enabling reduction of an adjustment pitch of a leg length.SOLUTION: A member fastening structure includes: a columnar member in which a plurality of recessed parts are continuously formed along a longitudinal direction on an outer peripheral surface; a hollow cylindrical member in which the columnar member is inserted and a through hole is formed at one end; a tight-holding member which is formed so as to enclose an outer peripheral surface of the one end of the cylindrical member into which the columnar member is inserted; a fastening member which is screwed into the tight-holding member to press an outer peripheral surface of the cylindrical member to hold the column member and the one end of the cylindrical member tightly with the tight-holding member; and a fitting member which is swingably provided at the tight-holding member and penetrates through the through hole of the cylindrical member at a protruding part formed at a tip to be fitted in the recessed part of the column member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a member fastening structure and a mounting tool for fastening members. [Background technology]

[0002] A fastening structure is known in which two frames attached to the legs of a trainee are fastened with bolts and nuts, and the leg length can be adjusted by adjusting the fastening position of the two frames according to the length of the legs (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-35220 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above fastening structure, when the leg length adjustment pitch is made finer, the bolts and nuts must be made smaller, which may result in a decrease in rigidity.

[0005] The present invention has been made in consideration of such problems, and its main object is to provide a member fastening structure and a wearing device that can maintain rigidity while allowing fine adjustment pitch of leg length. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present invention is to a columnar member having a plurality of recesses continuously formed on an outer circumferential surface thereof along a longitudinal direction; a hollow tubular member into which the columnar member is inserted and having a through hole formed at one end; a clamping member formed to surround an outer circumferential surface of one end of the tubular member into which the columnar member is inserted; A fastening member that is screwed into the clamping member and presses the outer peripheral surface of the tubular member to clamp the columnar member and one end of the tubular member with the clamping member; a fitting member that is swingably provided on the clamping member, a protruding portion formed at a tip thereof that passes through a through hole of the tubular member and fits into a concave portion of the columnar member; A member fastening structure comprising: It is. In one aspect of this embodiment, the device may further include a pressing member that is sandwiched between the outer peripheral surface of one end of the tubular member and the inner peripheral surface of the clamping member, and is pressed against the outer peripheral surface of one end of the tubular member by twisting the fastening member into the clamping member and pressing the fastening member toward the tubular member with the tip end of the fastening member. In this aspect, an elastic member may be interposed between the pressing member and the fastening member. In this aspect, the device may further include at least one fastening member that is screwed into the clamping member and presses the pressing member toward the tubular member. In order to achieve the above object, one aspect of the present invention is to An upper leg frame that is attached to a user's upper leg; A lower leg frame attached to the lower leg of the user and connected to the upper leg frame via a knee joint; A foot frame connected to the lower leg frame via an ankle joint, The member fastening structure described in any one of the above is provided on at least one of the upper leg frame and the lower leg frame. Wearing equipment may be also possible. In this one aspect, the upper leg frame and the lower leg frame may be configured as a one-sided support frame, and the cross sections of the tubular member and the columnar member may be formed in an elliptical shape. Effect of the Invention

[0007] According to the present invention, it is possible to provide a member fastening structure and a wearing tool that can maintain rigidity while allowing fine adjustment pitch of leg length. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing a configuration of the wearing tool according to the embodiment. [Diagram 2] 1 is a perspective view showing a configuration of a member fastening structure according to an embodiment; [Diagram 3] 3 is a cross-sectional view of the member fastening structure shown in FIG. 2 cut in the horizontal direction. [Figure 4] 3 is a cross-sectional view of the member fastening structure shown in FIG. 2 cut in the vertical direction. [Diagram 5] FIG. 4 is a diagram showing slits formed in a cylindrical member. [Figure 6] 13A and 13B are diagrams illustrating rotation of a knob portion. [Figure 7] 13A and 13B are diagrams showing rotation restriction grooves of a knob portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will be described below through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Furthermore, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems.

[0010] The member fastening structure 1 according to this embodiment is, for example, a fastening structure capable of adjusting the leg length of the wearing tool 10 shown in FIG.

[0011] The wearing device 10 is worn, for example, on the affected leg of a user undergoing walking training, to assist the user in walking. The wearing device 10 has an upper leg frame 11 attached to the upper leg of the user, a lower leg frame 13 attached to the lower leg of the user and connected to the upper leg frame 11 via a knee joint 12, and a foot frame 15 connected to the lower leg frame 13 via an ankle joint 14.

[0012] The upper leg frame 11 is provided with an upper leg fixing part 16 for fixing the upper leg of the user. The lower leg frame 13 is provided with a lower leg fixing part 17 for fixing the lower leg of the user. The upper leg fixing part 16 and the lower leg fixing part 17 are formed of resin or the like. The knee joint part 12 is driven to rotate by a motor unit or the like. The ankle joint part 14 may have an adjustment mechanism for adjusting the movable range of the ankle joint part 14. Note that the configuration of the wearing tool 10 described above is an example and is not limited thereto.

[0013] The member fastening structure 1 according to this embodiment is provided on a lower leg frame 13, and is a fastening structure for adjusting the leg length of the lower leg frame 13. The lower leg frame 13 has a tubular member 2 the upper end of which is connected to a knee joint 12, and a columnar member 3 the lower end of which is connected to an ankle joint 14. The member fastening structure 1 fastens the lower end of the tubular member 2 to the upper end of the columnar member 3.

[0014] In addition, the member fastening structure 1 in this embodiment may be a fastening structure provided on at least one of the upper leg frame 11 and the lower leg frame 13 for adjusting the leg length of at least one of the upper leg frame 11 and the lower leg frame 13.

[0015] The cylindrical member 2 and the columnar member 3 are made of resin or the like for the purpose of weight reduction. In addition, since the wearing device 10 according to this embodiment is configured with a frame with a column on one side, high rigidity is required especially in the torsional direction of the frame. For this reason, the cross sections of the cylindrical member 2 and the columnar member 3 are preferably formed into a substantially elliptical shape in order to improve the torsional rigidity.

[0016] Fig. 2 is a perspective view showing the configuration of a member fastening structure according to this embodiment. As shown in Fig. 2, the member fastening structure 1 fastens a tubular member 2 and a columnar member 3. A plurality of recesses 31 are formed continuously along the longitudinal direction (vertical direction) on the outer peripheral surface of the columnar member 3. The recesses 31 are formed at equal intervals, for example, at a pitch of 5 mm.

[0017] Fig. 3 is a cross-sectional view of the member fastening structure shown in Fig. 2 cut in the horizontal direction, and Fig. 4 is a cross-sectional view of the member fastening structure shown in Fig. 2 cut in the vertical direction.

[0018] In this embodiment, the member fastening structure 1 comprises a columnar member 3, a hollow tubular member 2 into which the columnar member 3 is inserted, a clamping member 4 formed to surround the outer peripheral surface of one end of the tubular member 2, a fastening member 5 screwed into the clamping member 4, and an engaging member 6 that fits into the concave portion 31 of the columnar member 3.

[0019] The upper end of the columnar member 3 is inserted into one end, which is the lower end of the cylindrical member 2. A through hole 21 is formed in the lower end of the cylindrical member 2. As shown in Fig. 5, a slit 22 is formed in the cylindrical member 2 along the longitudinal direction. This slit 22 is formed so that when the cylindrical member 2 is held by the holding member 4, the cylindrical diameter is reduced.

[0020] The clamping member 4 is formed of, for example, an aluminum alloy casting (AC4C-T6). As shown in FIG. 3, the clamping member 4 is a substantially annular member formed to surround the outer circumferential surface of the lower end of the tubular member 2 into which the columnar member 3 is inserted. For example, a hole is formed in the clamping member 4. Meanwhile, a protrusion is formed on the outer circumferential surface of the lower end of the tubular member 2. The protrusion of the tubular member 2 fits into the hole of the clamping member 4, so that the clamping member 4 is positioned at the lower end of the tubular member 2.

[0021] The pillar-shaped member 3 is inserted into the tubular member 2 until the lower leg frame 13 reaches the desired leg length. Then, at the inserted position, the tubular member 2 and the pillar-shaped member 3 are clamped and fixed by the clamping member 4. The fastening member 5 is screwed into the clamping member 4 and presses the outer circumferential surface of the tubular member 2, thereby clamping the pillar-shaped member 3 and one end of the tubular member 2 with the clamping member 4. The fastening member 5 is made of stainless steel (SUS303) or the like.

[0022] It is preferable that a pressing member 7 is provided between the outer peripheral surface of one end of the tubular member 2 and the inner peripheral surface of the clamping member 4. The pressing member 7 is formed of an aluminum alloy (A50502) or the like. The pressing member 7 is sandwiched between the outer peripheral surface of one end of the tubular member 2 and the inner peripheral surface of the clamping member 4. When the fastening member 5 is screwed into the clamping member 4, the pressing member 7 is pressed toward the tubular member 2 by the tip of the fastening member 5.

[0023] In this way, the pressing member 7 is pressed against the outer circumferential surface of one end of the tubular member 2 by the fastening member 5. This pressing force allows the columnar member 3 and one end of the tubular member 2 to be held together by the clamping member 4. As described above, instead of directly pressing the tubular member 2 with the tip of the fastening member 5, by interposing the pressing member 7 between the outer circumferential surface of the tubular member 2 and the inner circumferential surface of the clamping member 4 and pressing the tubular member 2 with the surface of the pressing member 7, creep of the tubular member 2 can be suppressed.

[0024] Furthermore, it is preferable that an elastic member 8 such as a disc spring, urethane rubber, or the like is interposed between the pressing member 7 and the fastening member 5. This makes it possible to reduce the pressing force when the pressing member 7 is pressed against the cylindrical member 2, and to more effectively suppress creep of the cylindrical member 2.

[0025] A knob portion 51 that can be held by a user is fixed to the rear end of the fastening member 5 by a screw or the like. The user can rotate the fastening member 5 by rotating the knob portion 51, thereby screwing the fastening member 5 into the hugging member 4.

[0026] For example, as shown in FIG. 2, when the knob 51 is rotated to a vertical position, the columnar member 3 and the tubular member 2 are clamped with an appropriate clamping force, and as shown in FIG. 6, when the knob 51 is rotated to a position of approximately 150°, the clamping force between the columnar member 3 and the tubular member 2 is reduced, and the position of the knob 51 is set so that the leg length can be adjusted.

[0027] 7, the knob 51 is formed with a rotation restriction groove 52 that restricts the amount of rotation of the knob 51. Meanwhile, a rotation restriction pin 41 is provided on the end face of the hugging member 4. The rotation restriction pin 41 of the hugging member 4 fits into the rotation restriction groove 52 of the knob 51, and the user can rotate the knob 51 within the range of the rotation restriction groove 52. In this way, the user can easily hug the columnar member 3 and the tubular member 2 with the hugging member 4 by simply rotating the knob 51 without using a special tool.

[0028] However, when the columnar member 3 is inserted into the tubular member 2, a gap (backlash) may occur in the fit. In order to eliminate this backlash, as shown in Fig. 4, the clamping member 4 may be provided with an upper fastening member 18 and a lower fastening member 19 that are screwed into the clamping member 4 to press the pressing member 7 toward the tubular member 2.

[0029] The upper fastening member 18 is screwed into the clamping member 4 above the fastening member 5. The lower fastening member 19 is screwed into the clamping member 4 below the fastening member 5. The upper fastening member 18 and the lower fastening member 19 are screwed in beforehand, and the pressing member 7 is pressed evenly against the tubular member 2, thereby eliminating the backlash. With the backlash eliminated, the fastening member 5 is screwed into the clamping member 4, and the pressing member 7 is pressed against the tubular member 2 with a final pressing force, thereby enabling the tubular member 2 and the columnar member 3 to be securely clamped by the clamping member 4.

[0030] For example, the above-mentioned fastening member 5, upper fastening member 18 and lower fastening member 19 are assembled to the embracing member 4 as follows.

[0031] (1) The upper fastening member 18 and the lower fastening member 19 are screwed into the clamping member 4 with a torque of about 1 Nm. This makes it possible to remove any play in the fit that occurs when the columnar member 3 is inserted into the tubular member 2. (2) Loosen the upper fasteners 18 and the lower fasteners 19 by approximately 1 / 4 turn. (3) Repeat the above (2) by sliding the columnar member 3 relative to the tubular member 2 with a force of 3 N or less until the leg length of the lower leg frame 13 can be adjusted. (4) The fastening member 5 is screwed into the clamping member 4 with a torque of approximately 0.5 Nm, and then further tightened until the knob portion 51 is oriented vertically for the first time. (5) The knob portion 51 is fixed to the rear end of the fastening member 5 with a screw.

[0032] An elastic member such as a disc spring may be interposed between the pressing member 7 and the upper fastening member 18 and the lower fastening member 19. This makes it possible to suppress creep of the cylindrical member 2 when the pressing member 7 is pressed against the cylindrical member 2.

[0033] The fitting member 6 is provided on the holding member 4 as shown in Fig. 3. The fitting member 6 is provided so as to be able to swing about a support shaft 61. The fitting member 6 is a lever-like member having a convex portion 62 formed at its tip. An elastic member 63 such as a spring is provided between the rear end of the fitting member 6 and the holding member 4.

[0034] The elastic member 63 biases the convex portion 62 at the tip of the fitting member 6 against the tubular member 2, with the support shaft 61 as a fulcrum. When the columnar member 3 and the tubular member 2 are fixed to each other by the clamping member 4, the convex portion 62 at the tip of the fitting member 6 passes through the through hole 21 of the tubular member 2 and fits into the concave portion 31 of the columnar member 3.

[0035] This allows the embracing member 4, the tubular member 2, and the columnar member 3 to be integrated, and improves strength and rigidity in the front-rear and left-right directions while reliably preventing misalignment in the leg length direction between the columnar member 3 and the tubular member 2. Also, as described above, the leg length can be easily adjusted without the need for a dedicated tool.

[0036] Furthermore, the columnar member 3 is inserted into the tubular member 2 in accordance with the pitch of the recessed portions 31 of the columnar member 3, thereby making the lower leg frame 13 have a desired leg length. Therefore, the leg length adjustment pitch can be easily fined by simply setting a small pitch for the recessed portions 31 of the columnar member 3. In other words, according to the member fastening structure 1 of this embodiment, the leg length adjustment pitch can be fined while maintaining rigidity.

[0037] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0038] 1 member fastening structure, 2 tubular member, 3 columnar member, 4 embracing member, 5 fastening member, 6 fitting member, 7 pressing member, 8 elastic member, 10 wearing device, 11 upper leg frame, 12 knee joint portion, 13 lower leg frame, 14 ankle joint portion, 15 foot frame, 16 upper leg fixing portion, 17 lower leg fixing portion, 18 upper fastening member, 19 lower fastening member, 21 through hole, 22 slit, 31 concave portion, 41 rotation restriction pin, 51 knob portion, 52 rotation restriction groove, 61 support shaft, 62 convex portion, 63 elastic member

Claims

1. a columnar member having a plurality of recesses continuously formed on an outer circumferential surface thereof along a longitudinal direction; a hollow tubular member into which the columnar member is inserted and having a through hole formed at one end; a clamping member formed to surround an outer circumferential surface of one end of the tubular member into which the columnar member is inserted; A fastening member that is screwed into the clamping member and presses the outer peripheral surface of the tubular member to clamp the columnar member and one end of the tubular member with the clamping member; a fitting member that is swingably provided on the clamping member, a protruding portion formed at a tip thereof that passes through a through hole of the tubular member and fits into a concave portion of the columnar member; A component fastening structure comprising:

2. The member fastening structure according to claim 1, The fastening member is further provided with a pressing member that is sandwiched between an outer peripheral surface of one end of the tubular member and an inner peripheral surface of the clamping member, and is pressed against the outer peripheral surface of one end of the tubular member by twisting the fastening member into the clamping member and pressing the fastening member toward the tubular member by the tip of the fastening member. Component fastening structure.

3. The member fastening structure according to claim 2, An elastic member is interposed between the pressing member and the fastening member. Component fastening structure.

4. The member fastening structure according to claim 2, At least one fastening member is further provided which is screwed into the clamping member and presses the pressing member toward the tubular member. Component fastening structure.

5. An upper leg frame that is attached to a user's upper leg; A lower leg frame attached to the lower leg of the user and connected to the upper leg frame via a knee joint; A foot frame connected to the lower leg frame via an ankle joint, The member fastening structure according to any one of claims 1 to 4 is provided on at least one of the upper leg frame and the lower leg frame. Wearing equipment.

6. The wearing device according to claim 5, The upper leg frame and the lower leg frame are each formed of a one-sided support frame, The cross sections of the cylindrical member and the columnar member are formed in an elliptical shape. Wearing equipment.

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