JP2000265663A - Easy-detachable connection tool and work table - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a low-cost connecting tool that is used for high-altitude work platforms that can be assembled and disassembled and that can be quickly and safely attached to and detached from structural frame materials by simple work without tools. I do. A semi-circular curved portion having a semicircular shape, a locking piece extending perpendicularly to one end thereof and having a bolt fixing protrusion protruding outward at the distal end, and a bent portion bent outward from the distal end at the other end. The engagement piece 29 and the connecting portion 30 at an appropriate position
An extruded section having a cross-sectional shape having an is cut out to an appropriate length.
A bolt locking groove 24 is formed at the center of the locking piece 23 in the pushing direction, and a bolt having a long hole extending from the position facing the bolt locking groove 24 to the bent portion 26 is formed at the center of the engaging piece 29. An undulating hole 27 is provided. The locking bolt 40 provided with the mounting pin 43 at one end is inserted into the bolt locking groove 24 from the bolt undulating hole 27. If a pair of fitting ridges 28 are provided inside the locking piece 23 and the engaging piece 29, the connection is further strengthened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector capable of connecting structural pipe materials quickly and safely, and a work table assembled using the connector.

[0002]

2. Description of the Related Art Iron and aluminum ladders, stepladders, and the like have been used in high places such as interior construction and wall construction of houses.
However, the ladder has a problem in that the worker's weight is placed on the upper part, which may scratch the walls of a newly constructed house, and the stepladder needs a wide and flat scaffold. Particularly on stairs, work was required in dangerous situations. Therefore, recently, assembly using lightweight aluminum extruded pipe material,
Worktables that can be easily disassembled have become widespread.

[0003]

The work table 1 which is easy to assemble and disassemble uses, for example, an extruded aluminum pipe material as a structural pipe material P as shown in FIG. The bar 4, the oblique bar 5, the work floor 3 and the like are assembled and assembled in a form according to the installation situation at the work site. Depending on the assembling method, it is possible to flexibly cope with a flat place F (FIG. 1a) and a middle of the stairs S (FIG. 1b). Outriggers 6 are appropriately installed below the work table 1 to prevent the bed from falling. The assembly work table 1 requires frequent responses according to the situation at the site, and requires quick assembly, disassembly, and movement. Each member such as the structural pipe material P and the work floor 3 is preferably connected and disassembled by means as simple as possible.

As shown in FIG. 2, an iron connecting member 10 having an engaging piece 11 and a locking piece 12 has conventionally been used for connecting structural members. That is, the structural pipe material P made of aluminum or the like is fitted into the recess of the engagement piece 11,
It is sandwiched by the locking pieces 12 from above. Next, the locking bolt 13 pivotally attached to the engaging piece 11 is rotatably attached to the locking piece 1.
The connecting tool 10 is fixed to the structural pipe material P by hooking the locking bolt 13 on the notch provided in 2 and tightening the nut 14. A mating member (not shown) connected to the structural pipe member P is fixed by connecting bolts 15. In this type of connector 10, the rigidity of the engagement piece 11 and the engagement piece 12 is high, and the nut 14 needs to be firmly tightened. Once loosened because the tightening is weak or the structural pipe material P is deformed, the connecting tool 10 easily slides in the longitudinal direction of the structural pipe material P, and there is a danger of being overwhelmed. Therefore, in actual use, a tool such as a wrench is required to strongly tighten the nut 14, which has been inconvenient for assembly and disassembly. Moreover, the number of parts of the connecting tool 10 itself is large,
There was a problem in manufacturing cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve such a problem, and has a connecting member which has a small number of parts, is easy to manufacture, and enables quick connection and disassembly. An object of the present invention is to provide a worktable assembled using a connecting tool. In order to achieve the object, according to the present invention, a bolt is provided at one end of a semicircular curved portion surrounding substantially a half circumference of a structural pipe material, at a center of a tip end of a locking piece extending in a tangential direction of the structural pipe material. A corner formed with a locking groove, a bent portion bent outward from a tip of an engaging piece extending in a tangential direction of the structural pipe material from the other end of the semicircular curved portion, and extending from the engaging piece to the bent portion. A bolt body is formed in the center of the connector, and one or more connecting portions are raised from one or more of one or more of a locking piece, a semicircular curved portion, and an engaging piece; A locking bolt which is inserted into the bolt locking groove from the hole, is provided with a stopper at one end protruding from the bolt undulating hole, and is screwed with a wing nut at the other end protruding from the bolt locking groove. It is characterized by having. When a projection is formed on the outer side of the tip of the locking piece, the bolt tightened with the wing nut is prevented from being removed. It is preferable that a fitting protrusion is formed inside the boundary between the locking piece and the engagement piece and the semicircular curved portion, and the semicircular curved portion is made thinner than the locking piece and the engagement piece. . The connector body is made of an extruded aluminum material or a resin molded product. In the resin-made coupling body, a spring material is fixed to the inner surface of the semicircular curved portion as necessary to provide elasticity. The workbench is configured to fit the semicircular curved portion of the connector main body to the vertical structural pipe material, and to stand up from one or more of one or more of a locking piece, a semicircular curved portion, and an engaging piece. Alternatively, it is assembled by connecting a structural pipe material in a lateral direction or an oblique direction to a plurality of connecting portions.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A connector 20 according to the present invention is, for example, a connector main body 21 obtained by cutting an extruded aluminum material or a synthetic resin molded product having a cross section shown in FIG.
Use The connecting member main body 21 has a semicircular curved portion 22 having a curvature R substantially equal to the radius of the structural pipe material P. A locking piece 23 rises from one end of the semicircular curved portion 22 in the tangential direction of the structural pipe material P. Locking piece 23
Has a bolt fixing projection 25 protruding outward at the tip end thereof, and a bolt locking groove 24 formed at the center in the width direction. An engagement piece 29 rises from the other side of the semicircular curved portion 22 in a tangential direction of the structural pipe material P.
The distal end of the engagement piece 29 is bent outward at a right angle.
It has become. Bolt undulation holes 27 are formed at the corners between the engagement pieces 29 and the bent portions 26 in a positional relationship corresponding to the bolt locking grooves 24. The semicircular curved portion 22 is provided with an engaging piece 23 and an engaging piece 29 so that the connecting member body is easily elastically deformed.
It is slightly thinner compared to. In addition, at the boundary between the semicircular curved portion 22 and the locking piece 23, the engaging piece 29, the fitting raised portion 28 is used to stabilize the position of the structural pipe material P housed in the semicircular curved portion 22. Is provided as needed. The engaging piece 29 has a mating material Q (FIG. 4B) on the structural pipe material P.
Is provided with one or more connecting pieces 30 protruding outward. The connecting piece 30 has a connecting bolt 3 inserted into a bolt hole provided at the end of the mating member Q.
A connecting bolt hole 31 into which 1a is fitted is formed.

[0007] As shown in FIG.
A screw portion 41 is formed from the end portion to the center portion, and a mounting pin 43 is formed at the other end portion so as to prevent removal from the bolt undulating hole 27.
Is inserted. The locking bolt 40 is inserted into the bolt up / down hole 27 below the bent portion 26 with the screw portion 41 leading first. The locking bolt 40 is prevented from being pulled out of the bolt undulation hole 27 by the mounting pin 43, and can swing freely around the mounting pin 43 in a plane perpendicular to the engagement piece 29. FIG. 4A shows a state in which the locking bolt 40 is upright. Bolt undulation hole 2
The washer 44 is fitted to the threaded portion 41 of the locking bolt 40 inserted through 7, and the wing nut 42 is screwed. Next, the locking bolt 40 is turned down, and the locking bolt 40 is positioned in the bolt locking groove 24 as shown in FIG.
Tighten. The washer 44 is pressed against the outer surface of the locking piece 23 by the tightening of the wing nut 42, so that the washer 44 does not come off from the bolt locking groove 24 by the bolting projection 25. When connecting the mating member Q to the structural pipe member P, the connecting member 20 is attached to the end of the mating member Q with the connecting bolt 31a, and the mounting pin 43 is locked to the shaft as shown in FIG. Rotate the bolt 40 to raise it vertically, and the structural pipe material P
Is fitted inside the semicircular curved portion 22. At this time, the distal end of the structural pipe material P may be slid along the semicircular curved portion 22 of the connecting tool 20 in the pipe axis direction (A), but the semicircular curved portion 22 is opened by elasticity, so that the engagement is limited. The space between the stop piece 23 and the engagement piece 29 can be pushed in the direction (B) perpendicular to the tube axis.

The structural pipe material P fitted into the connecting member main body 21 is sandwiched by the inner surface of the semicircular curved portion 22 in a circumferential half of the structural pipe material P and is temporarily fixed. The angle in the plane perpendicular to the pipe axis direction A and the pipe axis in the temporarily fixed state is adjusted,
The connection position is determined. Next, the locking bolt 40 is rotated about the mounting pin 43, and the washer 44 and the wing nut 42 are positioned outside the locking piece 23 as shown in FIG. Into the bolt locking groove 24. Then, when the wing nut 42 is turned by a finger and tightened, the locking bolt 40 becomes the bolt fixing projection 25 and the bent portion 2.
6, the movement in the direction perpendicular to the axis is regulated and stabilized, and the locking piece 23 and the engaging piece 29 are elastically deformed inward, so that the structural pipe material P is clamped at least half in the circumferential direction. As a result, the outer surface comes into close contact with the semicircular curved portion 22. In this respect, basically, the force for fixing and holding the structural pipe material P is significantly larger than that of the connecting tool 10 of FIG. 2 which sandwiches the structural pipe material by point contact. Further, when the fitting protrusion 28 is provided, stress is concentrated on the fitting protrusion 28 extending in the tube axis direction by the leverage of the locking piece 23 and the engagement piece 29, and It is fixed firmly. Since the connecting member main body 21 has an appropriate elasticity, the structural pipe member P is likely to be slightly deformed or subjected to excessive vibration due to the spring action of the locking piece 23 and the engaging piece 29, and is likely to shift. However, since the state in which the adhesion is ensured is maintained, deviation is prevented.

The fitting raised portion 28 provided as necessary makes the temporary fixing of the structural pipe material P more reliable, but is half as large as the locking piece 23 and the engaging piece 29 as shown in FIG. The thickness of the circular curved portion 22 may be reduced. Similarly, the step 32 formed by reducing the thickness of the semicircular curved portion 22 ensures the temporary fixing of the structural pipe material P, so that even when the locking bolt 40 is tightened, the structure pipe member P is tightly connected. In addition, since the thin semicircular curved portion 22 is more easily elastically deformed than the engaging piece 23 and the engaging piece 29, the adaptability to the structural pipe material P is also improved. The connecting part 30 is shown in FIG.
In FIG. 4, it is provided outside the engagement piece 29, but may be provided on the semicircular curved portion 22 (FIG. 6a) and the locking piece 23 (FIG. 6b). Further, the semicircular curved portion 22, the locking piece 23, the engaging piece 29
It is also possible to provide a plurality of connecting portions 30 in any of the above. In any case, it is easily manufactured by cutting out from an extruded aluminum or resin material or a resin molded product having a required cross-sectional shape. In the case of resin, it is preferable to supplement the elasticity by fixing a spring material in the direction of the inner surface bending of the semicircular curved portion 22. The locking bolt 40 is the bolt undulating hole 27
The retaining pin for preventing the bolt from coming off is not limited to the mounting pin 43, but a bolt head having a diameter approximately equal to the length of the mounting pin 43 or a projection integrated with the locking bolt 40 at one end of the locking bolt 40. May be provided.

[0010]

As described above, since the connecting device of the present invention has a semicircular curved portion which is in surface contact with almost half the circumference of the structural pipe material, it is significantly higher than the conventional connecting device. The structural pipe material can be fixed and held with strength. In addition, since the structural pipe material can be connected by simple work just by tightening the wing nut, the work table can be easily assembled and dismantled.
A worktable with high adaptability to various installation conditions depending on the work site can be obtained. Moreover, since the number of parts is small, the risk of loss is small, and the manufacture becomes easy.

[Brief description of the drawings]

[Fig. 1] Example of entire interior scaffold

FIG. 2 shows an example of a conventional connector.

FIG. 3 is a sectional view (a), a bird's-eye view of the main body (b), and a locking bolt (c) of an extruded profile used for the main body of the connecting tool according to the present invention.

FIG. 4 is a view for explaining a use state of the connector according to the present invention.

FIG. 5 is a cross-sectional view of an extruded profile used in another example of the connector according to the present invention.

FIG. 6 shows another example of the connecting portion of the connecting device according to the present invention.

[Explanation of symbols]

Reference Signs List 20: connecting tool 21: connecting tool main body 22: semicircular curved part 23: locking piece 24: bolt locking groove 25: bolt locking projection 2
6: Bending part 27: Bolt up / down hole 28: Fitting raised part 29: Engagement piece 30: Connection piece 31: Connection bolt hole 32: Step 40: Locking bolt 41: Screw part 42: Wing nut 43: Pin 44 : Washer S: Step F: Flat surface P: Structural member R: Curvature A: Pipe axis direction B: Direction to pipe axis

Claims (7)

[Claims] 1. A bolt locking groove is formed at the center of the tip of a locking piece extending in a tangential direction of a structural pipe material from one end of a semicircular curved portion surrounding substantially a half circumference of the structural pipe material, The bent portion is bent outward from the tip of the engaging piece extending in the tangential direction of the structural pipe material from the other end of the curved portion, and a bolt undulation hole is formed at the center of the corner from the engaging piece to the bent portion And a connector body having one or more connecting portions raised from outside one or more of any one or more of a locking piece, a semicircular curved portion, and an engaging piece; An easy-to-detach connection tool comprising: a stopper provided at one end protruding from a bolt undulating hole; and a locking bolt screwed with a wing nut at the other end protruding from the bolt locking groove. 2. The easy-to-detach connection tool according to claim 1, wherein a projection for retaining the bolt is formed on the outer end of the locking piece. 3. A fitting protrusion is formed inside a boundary between the locking piece and the engagement piece and the semicircular curved portion.
Easy-to-remove connector as described. 4. The easy-to-detach connection tool according to claim 1, wherein the semicircular curved portion is thinner than the locking piece and the engagement piece. 5. The easy-to-detach connection tool according to claim 1, wherein the connection tool body is made of an extruded aluminum material. 6. The easy-to-detach connection tool according to claim 1, wherein the connection tool body is made of a resin molded product, and a spring material is fixed to an inner surface of the semicircular curved portion. 7. The connecting tool according to claim 1, wherein the semi-circular curved portion is fitted to a vertical structural pipe material, and the engaging piece, the semi-circular curved portion, and the engaging piece. A workbench in which a structural pipe member in a lateral direction or an oblique direction is connected to one or a plurality of connecting portions rising from one or a plurality of outsides.