JP3602733B2 - Structural material fixing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structural material fixing device used when a nut is inserted into a groove provided in a long structural material to connect another member.
[0002]
[Prior art]
Conventionally, in order to form a framework of a machine or a structure by arbitrarily combining structural materials formed according to a predetermined standard, a nut is attached to a T-slot provided in a central portion of the structure, and this nut is used for other purposes. Was fixed to the structural material with bolts. A structural material fixing device for holding a nut inserted in a T-groove at a predetermined position is disclosed in, for example, Japanese Utility Model Publication No. 6-39137 by the present applicant.
[0003]
This structural material fixing device comprises a nut holder made of synthetic resin and having a through hole corresponding to a female screw of a nut formed in a central portion of a plate-like body. The width of the side edges substantially perpendicular to the engaging projections is slightly larger than the width of the T groove. As a result, both side edges of the plate-like portion of the nut holder are pressed against the inner surface of the T-shaped groove of the structural material as elastically deformable portions to hold the nut.
[0004]
The method of using the nut holder is to insert a nut between the engaging projections of the nut holder, integrate the nut and the nut holder, and press the side edge of the nut holder against the inner surface of the T groove, Hold the nut in place.
[0005]
[Problems to be solved by the invention]
In the case of the above-mentioned conventional technology, two opposing points of a curved apex portion of a planar side edge portion between the engaging projections of the nut holder abut against the inner surface of the T-groove, and are slightly compressed. Since the nut is held by the resilient force, the amount of elastic deformation of the nut holder is so small that a sufficient holding force cannot be obtained. In addition, the contact state in the T-groove is almost point contact, and the contact area is small. Therefore, the amount of elastic deformation of the side edge portion of the nut holder due to the above-described compression due to wear caused by sliding of the nut holder in the T-groove. In some cases, it decreased, and the resilience also decreased. Furthermore, when a sufficient amount of elastic deformation cannot be obtained due to a dimensional error, the nut may not be able to be held in the T-groove.
[0006]
The present invention has been made in view of the above-mentioned problems of the prior art, and ensures that the nut is securely held in the T-groove by an appropriate elasticity of the nut holder, and that the sliding in the T-groove is easy and durable. It is an object of the present invention to provide a structural material fixing device having high operability.
[0007]
[Means for Solving the Problems]
The present invention is a structural material fixing device for holding a nut at a predetermined position of a groove portion such as a T-shaped groove provided on a long structural material such as an extruded aluminum material and fixing other members to the structural material. A nut holder provided with a through hole corresponding to the female screw of the nut is provided at the center of the plate made of synthetic resin, and a pair of opposite edge portions of the nut holder is provided with respect to the surface of the plate. Structural material in which an engaging protrusion protruding at a right angle is provided, and a pair of elastically deforming portions protruding laterally are provided on two opposite side edges of the pair of engaging protrusions in the long side direction. It is a fixing device. The width between the edge portions of the pair of elastically deformable portions is formed slightly larger than the width of the groove, and a nut is held between the engaging projections of the nut holder and inserted into the groove of the structural material. In this case, the pair of elastically deformable portions abut against the inner surfaces of the groove that oppose each other, and are elastically deformed. The elastic force holds the nut in the groove. Further, cuts are formed at four places on the peripheral edge of the through hole, and the peripheral edge of the through hole is provided so as to be fittable into a thread groove of a bolt with which the nut is screwed.
[0008]
Further, the nut holder is formed of a synthetic resin having an appropriate elasticity, and the elastically deforming portion of the nut holder is formed in a wing shape extending in a long side direction of the pair of engaging protrusions. Each pair of edges of the deformed portion is in line contact with the inside of the groove of the structural material, and holds the nut.
[0009]
According to the structural material fixing device of the present invention, a nut is inserted in advance between the engaging projections of the nut holder, and the elastically deforming portion of the nut holder is pressed in a line contact state in the groove of the structural material to elastically bend. , And is held in the groove by its elastic force. Then, the nut is slid and held together with the nut holder at a predetermined position in the groove, and another member is connected to the structural material by a bolt.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 5 show a nut holder 1 and a nut 5 which are structural material fixing devices according to a first embodiment of the present invention. The nut 5 is made of a regular square metal. The width of the nut 5 is the width of the inner surface of the hollow portion 18 in the T groove 16 which is the groove of the long structural member 14 such as an extruded aluminum member into which the nut is inserted. Slightly smaller than width.
[0011]
The nut holder 1 is formed by molding a synthetic resin such as polyacetal into a U-shape. The nut holder 1 has a through hole 2 formed at the center, and engaging projections 3a and 3b are provided on a pair of opposing sides. ing. Further, cuts 6 are formed at four locations in the peripheral edge of the through hole 2, and the peripheral edge 2a of the through hole 2 is formed in a slope as shown in FIG. Have been.
[0012]
The engaging projections 3a, 3b are formed such that both end portions of the nut holder 1 project at right angles to the surface on which the through hole 2 is formed. The sides 3c, 3d of the nut holder 1 that are orthogonal to the engaging projections 3a, 3b are formed in a shape slightly bulging outward, and the edges of the sides 3c, 3d are also formed in an inclined shape.
[0013]
Elastic deformation portions 4a and 4b formed in a wing shape are provided on two opposite side edges of the pair of engagement projections 3a and 3b in the long side direction. The width between the tip edges of the elastically deforming portions 4a and 4b is formed slightly larger than the width of the hollow portion 18 of the structural member 14. Further, the thickness of the elastically deforming portions 4a and 4b is formed to be substantially uniform and thin so as to be easily elastically deformed with a small force.
[0014]
Next, a method of using the nut holder 1 and the nut 5 will be described with reference to FIG. In the nut holder 1 of this embodiment, the nut 5 is sandwiched between the engaging projections 3a and 3b, and inserted into the hollow portion 18 of the T-shaped groove 16 of the structural member 14. At this time, since the elastic deformation portions 4a and 4b of the nut holder 1 are formed slightly wider than the inner surface of the hollow portion 18, the elastic deformation portions 4a and 4b are pressed against the inner surface of the hollow portion 18 by insertion and elastically deform inward. The bending and the elastic force generated by the bending generate a frictional force, so that the nut holder 1 and the nut 5 are held at arbitrary positions in the T groove 16. In this state, the elastically deforming portions 4a and 4b of the nut holder 1 are in line contact with the inner side surface of the T-shaped groove 16 in the width direction, and are in contact with a sufficient contact area.
[0015]
According to the structural material fixing device of this embodiment, the nut 5 can be easily and reliably stopped at a predetermined position of the T groove 16 by the elastic force due to the bending of the nut holder 1. The elastically deformable portions 4a and 4b of the nut holder 1 have a shape that is easy to bend, and are largely deformed by a relatively small force, and a suitable resilient force is easily obtained. Therefore, even if the sliding in the T-groove 16 is repeated, the edges of the elastically deformable portions 4a and 4b are hardly worn, the amount of elastic deformation is reduced, the elastic force is not lost, and the nut 5 is stably formed. And slidability is also good. The nut holder 1 can easily be restored to its original shape, so that it can be used repeatedly.
[0016]
Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the structural material fixing device of this embodiment, a nut holder 1 is used for holding a long nut 10. The long nut 10 is provided with two screw holes 11 at two locations, and a pair of recesses 12 is provided in parallel between the screw holes 11 in a groove shape. Then, as shown in FIG. 7, the engaging protrusions 3 a and 3 b of the nut holder 1 are fitted into the recess 12, and the long nut 10 is inserted into the hollow portion 18 of the T-shaped groove 16 of the structural member 14. On the inner surface of the hollow portion 18 of the T groove 16, similarly to the first embodiment, the elastically deforming portions 4a and 4b are pushed into the inner surface of the hollow portion 18 to press the inner wall, and the frictional force causes the long nut 10 to arbitrarily move Hold in position.
[0017]
According to this embodiment, the long nut 10 can be easily stopped at a predetermined position of the T groove 16 by the nut holder 1. Moreover, the long nut 10 disperses the force applied to the structural member 14 and reduces the pressure for fixing, so that a high-strength connection can be achieved.
[0018]
Note that the nut holder of the present invention can appropriately change the shape of the nut and the nut holder, and the shape of the elastically deformable portion of the nut holder only has to have the function.
[0019]
【The invention's effect】
ADVANTAGE OF THE INVENTION In the structural material fixing device of this invention, a nut holder is formed in the shape which is easy to bend, and a large amount of elastic deformation can be obtained with small force. For this reason, the nut is locked in the groove of the structural material with an appropriate elasticity, and the slidability of the nut is good, and the holding force does not decrease even after repeated use, and the nut is stably and securely held. Can be held.
[Brief description of the drawings]
FIG. 1 is a perspective view of a structural material fixing device according to a first embodiment of the present invention.
FIG. 2 is a plan view of the nut holder of the embodiment.
FIG. 3 is a right side view of the nut holder of the embodiment.
FIG. 4 is a front view of the nut holder of the embodiment.
FIG. 5 is a partially enlarged sectional view of a through hole of the nut holder of the embodiment.
FIG. 6 is a plan view of a long nut according to a second embodiment of the present invention.
FIG. 7 is a front view of a long nut of the second embodiment.
FIG. 8 is a perspective view of the structural material fixing device according to the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nut holder 3a, 3b Engagement convex part 4a, 4b Elastic deformation part 5 Nut 10 Long nut 12 Depression 14 Structural material 16 T groove

Claims (2)

In a structural material fixing device that holds a nut at a predetermined position of a groove provided in a long structural material and fixes another member to the structural material, the nut is attached to a central portion of a synthetic resin plate. A nut holder having a through-hole corresponding to the female screw is provided, and a pair of opposite edge portions of the nut holder are provided with engaging projections projecting at right angles to the plate-like body surface. A pair of elastically deforming portions protruding laterally is provided at two opposite side edges of the engaging convex portion in the long side direction, and the width between the edge portions of the pair of elastically deforming portions is equal to the width of the groove. When the nut is held between the engaging projections of the nut holder and inserted into the groove of the structural material, the pair of elastically deformed inner surfaces of the groove are opposed to each other. The part abuts and is elastically deformed. Holding the Tsu bets, cut into 4 places of the peripheral portion of the through hole is formed, characterized in that the periphery of the through hole is provided to be fitted into the thread groove of the bolt in which the nut is screwed Structural material fixing device. The nut holder is formed of a synthetic resin having an appropriate elasticity, and each edge of the elastically deforming portion is in line contact with the inner surface of the groove of the structural material to hold the nut. Item 2. The structural material fixing device according to Item 1.

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