JPH0622441U - Connection structure of handrail members - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the tightening work of the nut and eliminate the risk of loosening the nut. [Structure] A base end side of a connecting bolt 3 is fixed to an end surface of a first handrail member 1, and an end surface of a second handrail member 6 and a working hole 7 having a circular cross section provided on an end peripheral surface of the handrail member. Penetrating the bolt insertion hole 8 between the peripheral surfaces, inserting the tip of the connecting bolt 3 into the bolt inserting hole 8 and projecting into the working hole 7, and screwing the nut 13 onto the end of the connecting bolt 3 for tightening. Both handrail members 1, 6
Were connected by polymerizing their end faces. A seat member 9 having a half-moon cross section is fitted and fixed to the opening of the bolt insertion hole 8 on the peripheral surface of the work hole 7, and a bolt insertion hole 11 penetrating between the cylindrical surface of the seat member 9 and the plane 10 is inserted. The flat surface 10 of the seat member 9 was made into the seat surface of the nut 13 by communicating with the bolt insertion hole 8 opened on the peripheral surface of the working hole 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for connecting handrail members provided on stairs or passages.

[0002]

[Prior art]

 This kind of handrail member connection structure is disclosed in Japanese Utility Model Laid-Open No. 1-61333, in which the base end side of a connecting bolt is screwed and fixed to the end face of one handrail member and the other handrail member. Between the end surface of the handrail and the peripheral surface of the work hole with a circular cross section provided on the peripheral surface of the end of the handrail, and the tip of the connecting bolt that penetrates the bolt insertion hole of the fool hole and protrudes from the end of one handrail. Through the bolt insertion hole of the other handrail and project into the work hole, and fit a curved washer that is curved into a cylindrical surface similar to the peripheral surface of the work hole at the tip of the connecting bolt in the work hole. And then screw the nut into place, insert a wrench into the work hole, tighten the nut, fit the convex outer surface of the curved washer to the concave peripheral surface of the work hole, and insert the nut into the concave inner surface of the curved washer. , And both handrail members are connected by superimposing their end faces.

[0003]

[Problems to be solved by the device]

 However, in the connection structure of the handrail members described above, when tightening the nut screwed to the connecting bolt in the working hole with a spanner, the curved washer rotates together with the nut, and the curved washer does not work. The nut may be tightened without fitting to the peripheral surface of. Therefore, when the nut is rotated, the curved washer must be pressed with fingers into the fitted state on the peripheral surface of the working hole. Also, the nut is tightened on the narrow side of the working hole rather than the wide center of the working hole. Therefore, tightening the nut requires a lot of trouble and is difficult.

Further, the nut and the curved washer do not come into surface contact with each other, but both side portions of the peripheral edge of the nut merely come into contact with the concave inner surface of the curved washer. Therefore, the nut may not be sufficiently tightened and may loosen.

An object of the present invention is to solve the above conventional problems.

[0006]

[Means for Solving the Problems]

 According to the present invention, the base end side of the connecting bolt is fixed to the end surface of one handrail member, and the end surface of the other handrail member and the peripheral surface of the working hole having a circular cross section provided on the end peripheral surface of the handrail member. Through the bolt insertion hole, and the tip of the connecting bolt that protrudes from the end surface of one handrail member is inserted into the bolt insertion hole of the other handrail member and protrudes into the work hole. In the connection structure of the handrail members in which the nuts are screwed onto the tip and tightened, and the end faces of both handrail members are overlapped and connected, in the bolt insertion hole opening on the peripheral surface of the work hole, The seat member is fitted and fixed, and the bolt insertion hole that penetrates between the cylindrical surface and the flat surface of the seat member is connected to the bolt insertion hole that is opened on the peripheral surface of the work hole. The connection structure of the handrail member is characterized in that the opening plane is used as the seat surface of the nut.

[0007]

[Action]

 In the present invention, since the flat surface of the seat member having a half-moon cross-section fitted to the peripheral surface of the working hole having a circular cross section is used as the seat surface of the nut, the curved washer is not required, and the curved washer can be operated with fingers. There is no need to press the peripheral surface of the working hole into a fitted state. Also, the nut is tightened at the wide center of the working hole, not at the narrow side of the working hole.

Further, the nut makes face-to-face contact with the flat surface of the seat member with or without a flat plate-shaped washer.

[0009]

[Effect of device]

 In the present invention, it is not necessary to press the curved washer with the fingers to the fitting state on the peripheral surface of the work hole, and the nut is tightened to the wide central portion in the work hole, so that the nut is tightened. The tightening work is easy and does not require much labor.

Further, since the nut is in surface contact with the flat surface of the seat member, it is sufficiently tightened and there is no fear of loosening.

[0011]

【Example】

 In the connection structure of the handrail member of this example, a pilot hole of the connecting bolt is provided on the end surface of the rod-shaped first handrail member 1 along the axial direction at the center position, and the annular fitting groove 2 is provided. Are installed concentrically with the pilot hole.

As shown in FIGS. 1 and 2, the pilot hole of the first handrail member 1 is provided with a coarse screw portion on the base end side and a fine screw portion on the tip end side of the connecting bolt 3 on the base end side. Is fixed by screwing in, and the tip end side of the connecting bolt 3 is projected from the center position of the end face of the first handrail member 1 along the axial direction.

As shown in FIGS. 1, 2 and 3, the fitting groove 2 on the end face of the first handrail member 1 is made of steel and has a plurality of protrusions 4 on both sides of the circular plate. The plate 5 is fitted and the projections 4 on one side of the locking plate 5 are pierced into the end surface of the first handrail member 1 to fix the locking plate 5 to the end surface of the first handrail member 1 and the locking plate 5 Each of the protrusions 4 on the other side of the first handrail member 1 is projected from the end face of the first handrail member 1.

As shown in FIGS. 1 and 2, a rod-shaped second wooden handrail member 6 having the same cross-section as the first handrail member 1 has a circular cross-section work hole 7 on the lower surface of the end portion as an axial core. It is provided in a right angle direction, and a bolt insertion hole 8 of a fool is penetrated along the axial center direction of the second handrail member 6 between the center position of the end surface of the second handrail member 6 and the peripheral surface of the working hole 7.

As shown in FIGS. 1, 2 and 4, a wooden seat member 9 having a half-moon cross-section is fitted into the opening of the bolt insertion hole 8 on the peripheral surface of the working hole 7 with an adhesive. The bolt insertion hole 11 which is fixed and penetrates between the cylindrical surface of the seat member 9 and the flat surface 10 in a direction perpendicular to the flat surface 10 is the same as the bolt insertion hole 8 opened on the peripheral surface of the working hole 7. The bolt insertion hole opening flat surface 10 of the seat member 9 is used as the seat surface of the nut so as to communicate with the core.

As shown in FIGS. 1 and 2, the tips of the connecting bolts 3 protruding from the end surface of the first handrail member 1 are inserted into the bolt insertion holes 8 of the second handrail member 6 and the bolt insertion holes 11 of the seat member 9, respectively. It is sequentially inserted and projected into the work hole 7, and the flat washer 12 is fitted to the tip of the connecting bolt 3 in the work hole 7 and the nut 13 is screwed to insert the spanner into the work hole 7. The nut 13 is tightened, and the projections 4 of the locking plate 5 projecting from the end surface of the first handrail member 1 are pierced into the end surface of the second handrail member 6 so that the first handrail member 1 and the second handrail member 6 The end faces are overlapped and the first and second handrail members 1 and 6 are concentrically connected.

When the nut 13 screwed to the tip of the connecting bolt 3 is tightened, the washer 12 comes into surface contact with the seat surface of the seat member 9, and the nut 13 comes into surface contact with the washer 12. As shown in FIGS. 1 and 2, the nut 13 is tightened in the central portion of the working hole 7.

After tightening the nut 13, a disc-shaped wooden plug 14 is fitted into the opening of the work hole 7 to close the work hole 7, as shown in FIGS. 1 and 2.

The first and second handrail members 1 and 6 connected in this manner are fixed on the pillars 15 on the side portions of the stairs, as shown in FIG.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a handrail member connection structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a perspective view of a seat member in the handrail member connection structure of the same example.

FIG. 5 is a side view showing a state where the handrail member of the same example is attached to stairs.

[Explanation of symbols]

 1 1st handrail member 3 Connection bolt 6 2nd handrail member 7 Work hole 8 Bolt insertion hole 9 Seat member 10 Plane, nut seat surface 11 Bolt insertion hole 13 Nut

Claims (1)

[Scope of utility model registration request] 1. A base end side of a connecting bolt is fixed to an end surface of one handrail member, and an end surface of the other handrail member and a peripheral surface of a working hole having a circular cross section provided on an end peripheral surface of the handrail member. Through the bolt insertion hole, and the tip of the connecting bolt protruding from the end surface of one handrail member is inserted into the bolt insertion hole of the other handrail member and protrudes into the work hole. In the connection structure of the handrail members in which the nuts are screwed together and tightened, and the end faces of both handrail members are overlapped and connected, in the bolt insertion hole opening on the peripheral surface of the work hole, a seat with a half-moon cross section is formed. The member is fitted and fixed, and the bolt insertion hole penetrating between the cylindrical surface of the seat member and the flat surface is communicated with the bolt insertion hole opened on the peripheral surface of the working hole, and the bolt insertion hole opening plane of the seat member is opened. The connection structure of the handrail member is characterized in that the nut is a seat surface of the nut.