JPH09287245A - Connection fixing device for pillar material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection fixing device for pillar materials of strong fastening force by vertically moving a collar following to vertical movement of a screw fastener, and pressure-contacting the collar with the inner face side of a pillar material so as to connect together and fix a pair of pillar materials. SOLUTION: A conical connection part 2 is fitted to one end of a pillar material 1 so that the diameter is small on the opposite side to the pillar material 1. The other pillar material 3 is larger than the pillar material 1 in diameter, and fitted outside it. A screw fastener 4 is formed into divided bodies along the connection part 2. For connecting together both pillar materials 1, 3, the pillar materials 1, 3 are relatively rotated, the screw fastener 4 is threadedly engaged with the threadely engaging part of the connection part 2, i.e., the screw part and moved on the large diameter side or the small diameter side of the connection part, but a collar is simultaneously moved. When the screw fastener 4 and the collar 5 are moved on the large diameter side, the collar 5 is pressure-contacted with the inner face of the pillar material 3 in the lengthwise direction, the axial direction, and hence both pillar materials 1, 3 can be firmly connected together and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a column member connecting and fixing device. The column member referred to here is a pair of column members that are connected and fixed so as to be capable of expanding and contracting in the longitudinal direction, and when both pairs are long, when one is long and the other is short, both are short. In either case, either is acceptable. For example, it can be used for a tripod of a camera, a clothesline, a pillar standing between a ceiling and a floor, a chair, a leg of a desk, and the like.

[0002]

2. Description of the Related Art A conventional pillar material, for example, a pair of pillars standing upright between a ceiling and a floor, is composed of a hollow cylindrical pipe, and at least the elliptical connector is provided at the tip of one pipe. Mount an elliptical peripheral surface on the inner surface of the tip of the other pipe, make the diameter of this peripheral surface larger than the diameter of the ellipse of the connector, and fit the elliptical comrades to each other By adjusting and rotating at a desired position, the large diameter part of the ellipse of the connector is pressed against the small diameter part of the elliptical peripheral surface of the other pipe to connect and fix both pipes. .

[0003]

Since the above-mentioned conventional connecting and fixing device is formed in an elliptical shape with respect to each other, two pipes or struts are connected to each other in two places of the large diameter portion of the ellipse of the connecting device in the other pipe. Only the two parts of the small diameter part of the ellipse of the circumference are pressed and fastened, and the connecting and fixing strength is weak, and the fastening can be released even if it is loosened a little, so it is not possible to suspend a heavy object on a pipe, There was a concern that the fastening would loosen due to vibration. Further, forming the pipe or the connecting member into an elliptical shape is special compared with the case of forming the circular shape, which results in an increase in production cost. Further, if the outer peripheral surface is elliptical, the use is further restricted. The present invention solves all the above problems.

[0004]

One of them is "when a pair of pillars are connected in a longitudinal direction, one end of one pillar has a small diameter on the side opposite to the pillar, Moreover, a conical connecting portion having a threaded portion formed on the peripheral surface is formed, and a threaded portion for screwing and coupling to the above threaded portion is provided on the inner surface side at the end of the other column member. The screw fittings are formed in a divided manner in the circumferential direction of the connecting portion, and a collar is provided between the outer surface side of the screw fitting and the inner surface side of the column member so as to connect with the rotation of one of the column members. When the screw part is rotated, the screw fitting is screwed into the connecting part and moves up and down along the axial direction of the connecting part, and the collar moves up and down in accordance with the vertical movement of the screw fixing device. When the diameter is substantially large or small and the outer diameter of the collar is large, the collar is pressed against the inner surface of the other pillar to connect the pair of pillars. Connecting and fixing apparatus pillar, characterized in that it is a constant. "A. Two of them are characterized in that "the screw fastener is made of a soft material with respect to the collar, and the screw fastener and the collar are provided with concave and convex engaging portions so that they are loosely engaged with each other. The column fixing and fixing device according to claim 1. "
It is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the apparatus of the present invention, when a pair of pillars are connected in the longitudinal direction, one end of one pillar has a small diameter on the side opposite to the pillar. Moreover, a conical connecting portion having a threaded portion formed on the peripheral surface is formed. A synthetic resin material is preferable as the material for forming the screw.
Then, at the end of the other column member, a screwing tool having a screwing portion for screwing and coupling to the screwing portion is formed on the inner surface side is formed in two to four divisions in the circumferential direction of the connecting portion. , And are formed so as to have a gap therebetween. In this way, the screw fitting and the connecting portion can be easily screwed together. Since the mutually screwed portions are formed on the conical peripheral surface, the sizes of the grooves and the crests may be set as desired, and may be loosened slightly.

Therefore, a collar is provided between the outer surface side of each of the screw fasteners and the inner surface side of the column member. The screw fastener is made of a synthetic resin material, the collar is also made of a synthetic resin material, and the screw fastener is a soft material with respect to the collar. Further, the collar is made of a material having a larger friction coefficient than that of the screw fastener. By doing this, the connection part rotates with the rotation of one of the pillars,
The screw fastener and the collar move up and down along the axial direction of the connecting portion, and the outer diameter of the collar becomes substantially large or small,
When the outer diameter of the collar is large, the collar is press-contacted to the inner peripheral surface side of the other pillar material in the length direction and the width direction so that the pair of pillar materials are connected and fixed. When the size becomes smaller, the connection between the pair of pillars becomes loose and the fixing is released. The face-to-face contact between the collar and the pillar material includes a wrinkle-like unevenness on the outer surface of the collar and a plurality of rib-like unevenness.

[0007]

1 to 5 show one embodiment of the present invention, and FIG. 6 shows another embodiment. In FIGS. 1 to 5, reference numeral 1 denotes a column member, which is a hollow cylindrical pipe member. A conical connecting part 2 is attached to one end of the conical part 2 so that the side opposite to the column member has a small diameter. The connecting portion 2 is made of a synthetic resin material, and a screw 2a is engraved on the peripheral surface. Reference numeral 2c is a mounting portion, which is fitted on the inner surface 1a of the column member and fixed via a stopper if necessary. 2b serves as a receiving portion for the screw fastener 4. This pillar is long,
A rectangular shape or the like may be used as long as a short or mating column member can be fitted outside the connecting portion.

Reference numeral 3 is the other pillar material, which in this embodiment is a hollow cylindrical pipe material. The pillar material is fitted over the pillar material with a larger diameter. Reference numeral 3a is an inner peripheral surface, and 4 is a screwing tool, which is shaped to fit along the connecting portion and is a divided body. 3 here
Divided. 4a is a threaded portion provided on the inner peripheral surface,
Reference numeral b denotes an engaging concave portion or a convex portion provided on the outer surface, which is a concave portion in the drawing.

Reference numeral 5 denotes a collar, the inner surface 5a of which is superposed on the outer surface of the screw fastener. Reference numeral 5b is an engaging convex portion which is loosely fitted in and engaged with the engaging concave portion. Reference numeral 5c is an engaging groove vertically provided in the central portion of the outer surface of the collar, and engages with an engaging protrusion 3b provided on the outer column member.

FIG. 3 is a sectional view taken along the line AA of FIG. 1 in a state where the respective members shown in FIG. 2 are assembled. As is clear from the drawing, a screwing tool 4 which is divided into three via a gap X is screwed into the connecting portion 2, and a collar 5 is in contact with the outer surface thereof. The engagement protrusion 5b of the collar 5 is loosely engaged with the engagement recess of the screw fitting 4. Further, the engagement protrusions 3b of the pillar material of the pipe are engaged with the engagement grooves 5c of the collar.

When connecting and fixing both pillars,
As shown in FIG. 4 and FIG. 5, when the column members 1 and 3 are relatively rotated, the screw fastener is screwed along the screwing portion of the connecting portion, that is, the screw portion, so that the large diameter side or the small diameter of the connecting portion is obtained. It moves to the side, but the color moves at the same time. FIG. 4 shows a state in which the screw fitting and the collar move to the large diameter side and the collar 5 is pressed against the inner surface of the column member 3 in the lengthwise and width directions with the collar 5 in contact with each other. The fixed state is shown.

FIG. 5 shows a state in which the screwing tool 4 moves toward the small diameter side of the connecting portion 2 and the collar 5 moves at the same time, so that the collar and the inner surface of the column member 3 are not in pressure contact with each other, that is, there is a gap 6. . Therefore, the pillar members are disconnected from each other.

FIG. 6 shows another embodiment of the screw fitting and the collar. In A, the collar has the same thickness in the longitudinal direction, and the screw fitting 4 has a taper. B has a taper on both the fastener and the collar. Although not shown, the pair of pillars according to the present invention means, as is clear from the above description of the configuration, a conical connecting portion on one pillar and a cone on the other pillar by screwing it into the conical connecting portion. It suffices to provide a screw fastener and a collar that move up and down in the axial direction of the shape, and it is not always necessary that both column members are long cylindrical hollow members. It will be appreciated that each may be a short piece or a pair of long and short pieces.

[0014]

According to the present invention, by organically providing the above-described structure, a connecting portion fixed to a pillar material, for example, a cylindrical pipe, a screw fitting, a collar, and an outer pillar material, for example, a cylindrical pipe are integrated. Be correct. In particular, since the screw fitting and the collar are formed as a divided body, and since the gap X is formed, the threaded portion fits well. In addition, since the screw fastener and the collar are made of a material having a large friction coefficient, the contact pressure between the outer surface of the collar and the inner surface of the column member becomes large, resulting in a strong connection. Further, since the screw fastener and the connecting portion are made of soft synthetic resin and are screwed together while having a cushioning property, the collar and the screw fastener are integrally connected by forming the concave and convex engaging portion. As a result, the pair of pillar members can be firmly connected and fixed, and conversely the connection can be released.

[Brief description of drawings]

FIG. 1 is a schematic front view of a column fixing and connecting device of the present invention.

FIG. 2 is a front view for explaining the same apparatus, which is disassembled.

FIG. 3 is an end view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of an essential part showing a state of the same device during press contact.

FIG. 5 is a cross-sectional view of an essential part showing the state of the same device when not in pressure contact.

6A and 6B are schematic end views showing another embodiment of the screw fastener and the collar.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 pillar material 2 connecting part 2a screwing part 3 pillar material 3a inner surface side 4 screwing tool 4a screwing part 4b concave-convex engaging part 5 collar 5b concave-convex engaging part

Claims (2)

[Claims] 1. When a pair of pillars are connected in the longitudinal direction, a threaded portion is formed on the peripheral surface at the end of one pillar so that the opposite side to the pillar has a small diameter. Is formed with a conical connecting portion, and a screw fitting for screwing and connecting to the screw portion is provided at the end of the other column member on the inner surface side in the circumferential direction of the connecting portion. And a collar is provided between the outer surface side of the screw-fastening tool and the inner surface side of the pillar material, and the screw-fastening tool is rotated by the rotation of one of the pillar materials. Is screwed to the connecting portion and moves up and down along the axial direction of the connecting portion, and the collar also moves up and down in accordance with the vertical movement of the screw fitting, so that the outer diameter of the collar is substantially large or small. The column is characterized in that when the outer diameter of the collar is large, the collar is pressed against the inner surface side of the other column member to connect and fix the pair of column members. Connecting and fixing device. 2. The screw fastener is made of a soft material with respect to the collar, and the screw fastener and the collar are respectively provided with concave and convex engaging portions so that they are loosely engaged with each other. Claim 1
Device for connecting and fixing the described pillar material.