JPH0583191U - Joint pin retainer - Google Patents

Abstract

(57) [Abstract] [Purpose] The retaining device for fixing the joint pin inserted in the scaffolding platform is inefficient in the conventional mounting work, and the end of the retaining device projects from the scaffolding platform. , There was a problem in safety management and it was difficult to clean the scaffold. The present invention aims to solve such problems. [Structure] An elastic stainless steel plate material is formed in the vicinity of both ends 17c of a U-shaped plate 17 which is bent and formed into a substantially U-shape.
Engagement protrusions 18 that protrude from the outer surface of the U-shaped plate 17 and are inserted into the lateral holes 8 and the through holes 5 are provided by swelling.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retaining device that locks a joint pin that connects upper and lower scaffolding pedestals to a scaffolding pedestal when assembling a plurality of assembled scaffolding pedestals in the vertical direction.

[0002]

[Prior Art]

 FIG. 6 is a front view showing an assembled scaffolding pedestal A and a joint pin B, and FIG. 7 is a perspective view of a temporary scaffolding pedestal in which two pieces are horizontally arranged and vertically assembled in two stages. The assembled scaffolding pedestal A has a tubular cross beam 1 and tubular hollow columns 2 and 2 fixed to both ends of the cross beam 1, and a reinforcing member fixed to the horizontal beam 1 and the hollow column 2. 3 and brace connecting projections 4 fixed to the upper and lower portions of each hollow column 2 are provided. From the shape thereof, it is usually called a torii frame.

A through hole 5 is formed in the upper portion of the hollow column 2 at a position having a dimension L ₁ from the upper end of the hollow column 2. The joint pin B to be inserted into the hollow support column 2 has a flange portion 7 which is provided substantially at the center of the outer peripheral surface of the tubular body 6, and a lateral hole 8 is formed in the lower half portion 6a below the flange portion 7 in FIG. Is drilled.

Since the lateral hole 8 is located at the position of the dimension L ₁ from the flange portion 7, the lower half portions 6a of the two joint pins B are inserted into the upper ends of the hollow support columns 2 and the lower end edge of the flange portion 7 is inserted. When contacting the upper end of the hollow support 2, the height of the through hole 5 and the height of the lateral hole 8 are the same, so turn the joint pin B so that the through hole 5 and the lateral hole 8 are superposed, and use the retaining device. Insert a certain engagement pin 9 (see FIG. 8), insert the straight leg 11a of the spring pin 11 through the hole 10 provided in the engagement pin 9, and make it straight with the bent leg 11b of the spring pin 11. The legs 11a prevent the engagement pin 9 from falling off (see FIG. 9).

A split pin 12 shown in FIG. 10 may be used to prevent the engagement pin 9 from falling off. The split pin 12 is inserted into the hole 10 of the engaging pin 9 inserted into the through hole 5 and the lateral hole 8, and then the distal end portion 12a is expanded to lock the split pin 12 to the engaging pin 9.

The joint pin B inserted into the hollow column 2 and the hollow column 2 are connected by the engagement pin 9, and the engagement pin 9 is prevented from falling off by the spring pin 11 (or the split pin 12). The lower end of the hollow pillar 2 of another scaffolding pedestal A is fitted to the upper half 6b of B, and the assembled scaffolding pedestals A are stacked vertically. In FIG. 7, two assembly-type scaffolding pedestals A are arranged in the horizontal direction and are vertically stacked in two stages. The scaffolding pedestals A arranged in the horizontal direction connect the braces connecting protrusions 4 to each other. Reinforced by the braces 13, the hooks 15 of the scaffolding plate 14 are fitted on the cross beams 1, 1.

[0007]

[Problems to be solved by the device]

 As described above, the attachment of the engagement pin 9 for connecting the assembled scaffolding pedestal A and the joint pin B and preventing them from being pulled out has the following problems. (1) The attachment of the engagement pin 9 must be performed when the joint pin B is inserted into the hollow column of the scaffolding stand A, which is troublesome. Further, after the engagement pin 9 is inserted, it is necessary to prevent the spring pin 11 (or the split pin 12) from coming off, so the work contents are complicated and inefficient, and it is desirable to facilitate this work. It was rare.

(2) Since the tip of the engaging pin 9 projects from the outer surface of the hollow column 2 of the scaffolding stand A, and the spring pin 11 is attached to this projecting tip, there is a drawback that the appearance of the assembled scaffolding is deteriorated. , There is a risk that a construction worker working at height may get injured or get caught on his clothes and lose his balance on the scaffolding 10. (3) Also, since paint and concrete adhere to the scaffolding stand A due to painting work and concrete placing work, the paint and concrete adhered to the scaffolding base A are cleaned and removed with a barrel or the like. The tip end of the engagement pin 9 protruding from the outer surface and the spring pin 11 are obstacles to cleaning and removal. (4) Since the tip of the engaging pin 9 and the spring pin 11 are exposed to wind and rain, there are drawbacks such as rusting and shortening of life. The present invention is intended to solve such problems.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the retainer for a joint pin of the present invention has a through hole in the upper part of a cylindrical support of an assembled scaffolding pedestal, and a substantially central portion of a cylindrical body that can be inserted into the through hole. A lateral hole is provided on one side of the joint pin that surrounds the collar, and when one side of the joint pin is inserted into the upper end of the cylindrical strut, the lateral hole and the through hole can be inserted. A stopper, which is bent into a substantially U shape from an elastic stainless steel plate, is formed into a columnar shape on the outer surface near both ends, and is fitted into the lateral hole of the joint pin and the through hole of the hollow strut. It is characterized in that an engaging projection having a diameter that can be inserted is bulged.

[0010]

[Action]

 To attach the joint pin retainer configured as described above, elastically reduce the distance between both ends of the U-shaped retainer, and then attach both ends of the retainer to the joint pin. Insert the engaging projection into the lateral hole of the joint pin. Next, insert one side of the joint pin into the upper part of the cylindrical column of the scaffolding stand, align the through hole with the horizontal hole, and insert the tip of the engaging protrusion protruding to the outer surface of the joint pin into the through hole of the hollow column. The joint pin retaining work is completed.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. As shown in the perspective view of FIG. 1, the front view of FIG. 2 and the side view of FIG. A U-shaped plate 17 that is bent into a U-shape and has concave portions 17b that are bent inwardly on both sides of the bent portion 17a, and U-shaped plates 17 near both ends 17c and 17c by a U-shaped press. Engaging projections 18 that are bulged toward the outer surface of the plate 17 (see FIG. 4).

The shape of the outer surface of the engaging projection 18 is substantially columnar, and the peripheral edge of the tip surface is rounded. The diameter d of the engaging protrusion 18 has a diameter that can be inserted into the lateral hole 8 of the joint pin B and the through hole 5 of the hollow strut 2, and the height h of the engaging protrusion 18 is the thickness of the joint pin B. The engaging protrusion 18 has a length larger than that of the through hole 5 and is inserted into the through hole 5 via the lateral hole 8. The distance b between the roots of the two engaging protrusions 18 (the boundary line between the engaging protrusions 18 and the U-shaped plate 17) is larger than the inner diameter of the joint pin B.

The bending portion 17 a of the U-shaped plate 17 is provided with a bulging reinforcing portion 19 on the inner side surface of the U-shaped plate 17, and elastic recovery when the U-shaped plate 17 is elastically deformed. I am increasing my strength. The edge portions of the lower half portion 6a and the upper half portion 6b of the joint pin B have a small diameter as shown in FIG. 5 in order to facilitate insertion into the hollow column 2, but a recess 17 is formed in the U-shaped plate 17. Since b is provided, the joint pin B and the retainer 16 do not interfere with each other when the retainer 16 and the lower half 6a are inserted.

The operation of the retainer 16 configured as described above will be described. First, the width of the U-shaped plate 17 is elastically compressed, and the two tip portions 17c and the engaging projections 18 are joint pin-jointed. When it is inserted into the lower half portion 6a of B and the engaging projection 18 is aligned with the lateral hole 8 of the lower half portion 6a, the engaging projection 18 is inserted into the lateral hole 8 by the elastic force of the U-shaped plate 17. The tip of the engaging protrusion 18 projects from the outer peripheral surface of the lower half portion 6a.

Next, the lower half 6a of the joint pin B to which the retainer 16 is attached is inserted into the upper portion of the tubular support 2 of the scaffolding pedestal A, and the collar portion 7 contacts the tubular support 2. When the joint pin B is rotated in this state, the tip of the engaging protrusion 18 is inserted into the through hole 5 of the hollow support 2, and the joint pin B is prevented from coming off the hollow support 2. The upper half 6b of the joint pin B attached to the hollow pillar 2 is fitted with the hollow pillar 2'of another scaffolding base A assembled on the scaffolding base A.

As described above, since the retainer 16 can be attached to the joint pin B before the joint pin B is inserted into the hollow column 2, the retainer 16 can be easily attached. . The joint pin B can be connected to the scaffolding base A by a simple operation of inserting and rotating the joint pin B with the retaining device 16. The engagement protrusion 18 inserted into the through hole 5 does not protrude to the outer surface of the hollow column 2.

[0017]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. (1) It is possible to prevent the joint pin from coming off simply by attaching a retaining device to the joint pin alone, inserting the joint pin into the scaffolding base, and rotating it. Therefore, the work of attaching the retainer is also facilitated. (2) In the conventional retaining device, the end portion of the retaining device protrudes from the surface of the scaffolding cradle, which is not preferable for safety management, but the retaining device of the present invention solved the problem. Also, cleaning of the scaffolding base has become easier. (4) Since the retainer is composed of only stainless steel plate material that is bent and bulged, the processing cost is low, and since it does not rust, the product life is extended.

[Brief description of drawings]

FIG. 1 is a perspective view of a retainer for a joint pin.

FIG. 2 is a front view of a retainer for a joint pin.

FIG. 3 is a side view of a retainer for a joint pin.

FIG. 4 is a vertical cross-sectional view of an engagement protrusion.

FIG. 5 is a vertical cross-sectional view of a joint pin with a retainer and an assembled scaffolding stand.

FIG. 6 is a front view for explaining the assembly of the assembled scaffolding stand.

FIG. 7 is a perspective view of the assembled scaffold.

FIG. 8 is a cross-sectional view of a conventional retaining device that connects a scaffolding stand and a joint pin.

FIG. 9 is a front view showing a conventional example of preventing engagement pins from falling off.

FIG. 10 is a front view showing another conventional example for preventing the engagement pin from falling off.

[Explanation of symbols]

 A Assembled scaffolding base B Joint pin 1 Horizontal beam 2 Hollow column 5 Through hole 6 Cylindrical body 6a Lower half 6b Upper half 7 Collar part 8 Horizontal hole 16 Stopper 17 U-shaped plate 17a Bend 17c Both ends 18 Engagement protrusion

Claims (1)

[Scope of utility model registration request] 1. A through hole is provided in an upper portion of a cylindrical column of an assembly type scaffolding pedestal, and a lateral side is provided on one side of a joint pin in which a flange portion is provided around a substantially central portion of a cylindrical body insertable into the through hole. Make a hole,
A retainer that can be inserted into the lateral hole and the through hole when one side of the joint pin is inserted into the upper end of the cylindrical column, and is bent into a substantially U-shape from an elastic stainless plate material. It is characterized in that it is formed into a cylindrical shape on the outer surface in the vicinity of both end portions, which is processed, and swells out an engaging projection having a diameter that can be inserted into the lateral hole of the joint pin and the through hole of the hollow strut. Joint pin retaining device.