JPH085246Y2 - Bracket for temporary scaffolding frame - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper for a temporary scaffolding frame used as a work scaffold in civil engineering or a construction site.

[0002]

2. Description of the Related Art As a scaffolding frame of this type, for example, as shown in FIG. 1, a pair of portal-shaped support legs 1, 1 are connected by a plurality of braces 2, 2 which are arranged in a cross shape as connecting members. There are things I tried to assemble. In this case, the support leg 1
At a predetermined position of (1), there is provided a metal fitting (4) for removably preventing the connection hole (3) on the side of the braces (2) from being detached. Conventionally, as the fastening metal 4, a utility model number 58-165156
Some are disclosed in the official gazette .

The above-mentioned conventional stopper is as shown in FIG.
In addition, a substantially elongated hole-shaped notch 102 extending from the opening end 101a to the base end side is formed on the outer periphery of the upper portion of the cylindrical body 101 protruding from a predetermined position of the support leg 1 and into which the connecting hole 3 is inserted. The free end portion 103 faces the side opposite to the protruding direction of the cylindrical body 101.
The base end portion 103b of a locking piece 103 having a substantially inverted U-shaped cross section, in which a is set to be capable of projecting and retracting from the cutout portion 102, is rotatably supported on the cylindrical body 101 via a pin 104, On the proximal end side of the locking piece 103, the locking step portion 105 on the opening end side of the cylindrical body 101 is locked to prevent the free end portion 103a from projecting for preventing removal of the free end 103a, that is, the retaining surface 106 with respect to the connecting hole 3. A notch 107 for determining the amount of exposure is formed, and further, between the upper inner surface of the locking piece 103 and the lower inner peripheral surface of the cylindrical body 101 in a direction opposite to the protruding direction of the cylindrical body 101. The bent spring-shaped returning spring member 108 having a substantially U shape is hooked.

When assembling the scaffolding frame M as shown in FIG. 1, if the connecting hole 3 on the side of the braces 2 is inserted into the cylindrical body 101, the free end portion 103a of the locking piece 103 becomes a spring. The member 108 is recessed into the notch 102 against the spring force of the member 108, and the engaging piece 103 projects from the notch 102 at a position where the connecting hole 3 passes the engaging piece 103. Therefore, the connecting hole 3 is prevented from coming off by the retaining surface 106 of the locking piece 103.

[0005]

However, in the above-mentioned conventional metal fittings for the temporary scaffolding frame, the notch 10 on the side of the locking piece 103 is used .
7 is obtained by subjecting the open end 101a of the tubular body 101 to a shrink tube forming process.
Locking step portion 10 formed in the lower portion near the opening end 101a
By locking the 5, but defines the retaining projections amount H for bracing side coupling hole 3, the engaging step portion 105
Is formed by shrinking the open end 101a of the cylindrical body.
Since it is formed, the removal preventing protrusion amount H is greatly affected by the processing accuracy of the locking step portion 105, and if the variation is large, the slip-out preventing action may be hindered.

Further, a substantially V-shaped spring member 108 is provided.
Is located on the side of the open end 101a of the cylindrical body 101 and
The pin 104 is still located in the bend and the spring
The end 108a of the member 108 on which the cylindrical body is suspended is the self-locking piece 103.
The locking piece 1 is positioned so as to be located immediately below the free end portion 103a.
03 and the tubular body 101, the lower end of the free end portion 103a of the locking piece 103 is the spring when the connecting hole 3 on the brace 2 side is inserted into the tubular body 101. Member 1
No. 08 of the locking body 10 is struck by the end 108a on the side where the cylindrical body is hung.
There was also a risk that the 3 would be prevented from entering the proper position.

The present invention has been made in order to solve the problems of the above-mentioned conventional ones, and the temporary scaffolding frame capable of smoothly inserting the connecting hole of the connecting member and surely exhibiting the retaining effect. The purpose is to provide a fastener.

[0008]

In order to achieve the above-mentioned object, the first aspect of the present invention, when indicated by reference numerals in the drawings, is projected and connected at a predetermined position of the temporary scaffolding frame M. forming a substantially long hole shape of the cutout portion 12 of the coupling hole 3 of the member 2 extends from its open end 11a on the side on the tubular body 11 to be inserted into the proximal end side, the protruding direction of the tubular body 11 The base end portion 15b of the locking piece 15 having a substantially inverted U-shaped cross section, which faces the opposite side so that the free end portion 15a can project and retract from the cutout portion 12, is fixed by the pin 13.
Ri while pivotally to the cylindrical body 11, inner periphery of the tubular body 11
The free end portion 15a of the locking piece 15 that abuts on the lower surface side portion 11b
Is formed at the lower end of the base end portion 15b of the locking piece 15, and the locking piece 15 is
Between the cylindrical body 11 and the cylindrical body 11, a spring member 1 having a substantially V shape in a side view is provided.
8, the central bent portion 18d of the spring member 18 is the locking piece 15
Both ends of the spring member 18 located in the free end 15a of the
The portions 18a and 18b are located near the pin 13 and
The locking piece 15 is constantly urged in a direction protruding from the cutout portion 12.
And the cylindrical body of the spring member 18
A configuration is adopted in which the side end 18c is engaged in the locking piece 15 .

[0010]

According to the first aspect of the present invention, when the connecting hole 3 on the connecting member 2 side is inserted into the cylindrical body 11, the free end portion 15a of the locking piece 15 becomes the spring of the spring member 18. The connection hole 3 is inserted into the cylindrical body 11 because it is recessed into the notch 12 against the force. When the connecting hole 3 passes through the locking piece 15, the free end portion 15a of the locking piece 15 is fixed to the spring member 18.
The connecting hole 3 is prevented from coming off because it protrudes from the notch 12 by the spring force. At this time, the protrusion amount H for retaining is determined by the locking piece 15
Of it is defined by the inner peripheral surface lower portion 11b of the cylindrical body 11 which is in contact with the base end portion inclined surface 17 formed on the 15b lower end, the inner peripheral surface lower portion 11b of the cylindrical body 11 is non a machining area, deer also is the inclined surface 17 can be easily formed with good precision
Therefore , the above-mentioned stopper protrusion amount H is set with high accuracy.
Therefore, it is possible to securely prevent the locking piece 15 from coming off.
This can be done, and there is no risk of the connecting member 2 deviating.

Further , in this case, the spring member 18 is
The central bent portion 18d of the spring member 18 is the free end of the locking piece 15.
Both ends 18 of the spring member 18 located within the portion 15a
a and 18b are located in the vicinity of the locking piece pivot attachment pin 13 and
The locking piece 15 is constantly urged in the direction in which it projects from the notch 12.
So that it is hung between the locking piece 15 and the tubular body 11.
In addition, the end 18c of the spring member 18 on which the cylindrical body is suspended is raised.
Since it is engaged in the locking piece 15, the connecting member 2
When the connecting hole 3 on the side is inserted into the cylindrical body 11, the locking piece 15
The free end of the locking piece 15 when the
The portion 15a projects from the tubular body hanging side end 18c of the spring member 18.
Do not let yourself be disturbed by immersing yourself.
And can properly perform the immersive action, therefore
The operation of inserting the connection hole 3 into the cylindrical body 11 can be performed smoothly, and
The anti-crash effect can be surely exhibited.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

2 and 3 are respectively an exploded perspective view and an assembled vertical sectional view showing an example in which a stopper for a temporary scaffolding frame according to an embodiment of the present invention is applied to the temporary scaffolding frame shown in FIG. is there.

2 and 3, a cylindrical body 11 made of a rigid metal or the like is projected from a predetermined portion of the support leg 1 in the temporary scaffolding frame M, and an outer periphery of an upper portion of the cylindrical body 11 is A substantially oblong hole-shaped notch 12 extending from the open end (tip) 11a toward the base end is formed. This cylinder 11
The opening end 11a is processed to have a reduced diameter in order to facilitate the insertion of the connecting hole 3 on the side of the braces 2 as the connecting member.

In the vicinity of the open end 11a of the cylindrical body 11, the spindle pin 13 is located on both sides of the cutout 12 in between.
A through hole 14 is formed so as to be fixed therethrough. The pin 13 is formed by, for example, notching a part of a tubular steel material along the axial direction, and is press-fitted into the through hole 14 to be firmly fixed.

Reference numeral 15 denotes a locking piece having a substantially U-shaped cross section, which is formed by folding a rigid rectangular plate material such as a steel plate in two.
It is arranged in the notch 12 in a direction opposite to the projecting direction. In this locking piece 15 , the pin 13 is inserted through a shaft hole 16 formed in a base end portion 15b of the free end portion 15a so that the free end portion 15a can project and retract from the cutout portion 12. The free end of the locking piece 15 is formed as a retaining surface 15c for the connecting hole 3 on the side of the brace 2.

An inclined contact surface 17 is formed at the lower corner of the base end portion 15b of the locking piece 15. The inclined surface 17 is in contact with the lower portion 11b of the inner peripheral surface of the cylindrical body 11 so as to define the protrusion amount H of the locking piece 15, that is, the exposed length of the retaining surface 15c. Underside 1
The cutout is formed so as to have a constant angle with respect to 1b.

Numeral 18 is formed to be bent in a V shape when viewed from the side.
The dog-legged spring member 18 is a spring member for return.
The central bent portion 18d of the inside of the free end portion 15a of the locking piece 15
It is arranged, and the one end 18a thereof is the locking piece 15
Is hung along the upper inner surface of the free end 15a of
The other end 18b is attached to the lower portion 11b of the inner peripheral surface of the cylinder 11 .
The spring force is always applied to the free end portion 15a of the locking piece 15 in a direction projecting from the notch portion 12 by being hooked . Further, both ends 18a, 18b of the spring member 18 are
Is close to the pin 13 that pivotally attaches the locking piece 15 to the cylinder 11.
The free end of the pin 13 from the pin 13 at the side position
It is located near the 15a side. Further, the end 18c of the spring member 18 on which the cylindrical body is hooked is bent inward so that
I am involved .

Next, the connecting hole 3 of the brace 2 is connected to the cylindrical body 1.
The procedure for stopping at 1 will be described.

When the connecting hole 3 of the brace 2 is inserted into the cylindrical body 11, the free end 15a of the locking piece 15 is moved to the pin 13.
While rotating about the center of the spring member 18 against the spring force of the spring member 18, as shown by the chain line in FIG. Therefore, the connecting hole 3 of the brace 2 is inserted to a position where it passes through the locking piece 15.

At this time, the central bent portion 18d of the spring member 18
Is located within the free end 15a of the locking piece 15 and the spring portion
Both ends 18a and 18b of the material 18 are located near the pin 13.
Is positioned, and further, the tubular body hanging side end 18c of the spring member 18 is
It should be bent inward and engaged in the locking piece 15.
Therefore, when the locking piece 15 is immersed in the notch 12,
The free end portion 15a of the stop piece 15 is hooked on the cylindrical body of the spring member 18.
Immersion is hindered by being caught in the installation side end 18c.
There is no risk that the
Therefore, the insertion operation of the connecting hole 3 into the cylindrical body 11
It can be done smoothly.

When the connecting hole 3 is inserted into the cylindrical body 11 to a position beyond the locking piece 15, the free end portion 15a of the locking piece 15 is notched by the spring force of the spring member 18.
To the return position shown by the solid line in FIG. 3, the connection hole 3 is prevented from coming off by the retaining surface 15c of the locking piece 15, and the connection of the braces 2 is completed.

A locking piece 15 for preventing the connecting hole 3 from coming off.
The amount H of protrusion of the free end portion 15a of the stopper is determined by the slanted contact surface 17 of the locking piece 15 contacting the lower portion 11b of the inner peripheral surface of the cylindrical body 11. That is, the lower portion 11b of the inner peripheral surface of the cylindrical body 11 which determines the above-mentioned protrusion amount H for preventing slip-out is shown in FIG.
A tubular body 1 that has been subjected to a reduced-tube processing like the conventional fastener shown in FIG.
01 is the locking step portion 105 formed at the open end 101a.
On the other hand, since there is no variation in the processing accuracy, the above-mentioned retaining protrusion amount H is accurately set to an appropriate amount. Therefore, the fear of deviation of the braces is eliminated.

In the above example, the connection hole 3 of the brace 2 serving as a connecting member is described as an example in which the connecting hole 3 is retained and retained in the cylindrical body 11, but the connecting member is determined by the brace 2 described above. is not.

[0025]

As described above, according to claim 1 of the present invention, the inner peripheral surface of the cylindrical body with which the inclined surface on the base end side of the locking piece abuts
Since the lower side defines the amount of protrusion for retaining that the free end of the locking piece prevents, the amount of protrusion for retaining can be set with high accuracy, eliminating the risk of deviation of the connecting member such as braces. can do.

Further , the dogleg-shaped central bent portion of the spring member is
Located within the free end of the locking piece and both ends of the spring member
The locking member is located near the pivotally mounted pin, and this spring member
The end of the side where the cylinder is hung is bent inward and is inserted into the locking piece.
Therefore, when the locking piece is immersed in the cutout part,
The free end of the stop piece hits the end of the spring member on which the cylinder is hung.
There is no risk that the
The insertion operation can be performed properly, and
It is possible to smoothly insert the connecting hole of
The retaining effect can be surely exhibited .

[Brief description of drawings]

FIG. 1 is a perspective view showing a temporary scaffolding frame to which a stopper for a temporary scaffolding frame of the present invention is applied.

FIG. 2 is an exploded perspective view showing a stopper in the embodiment.

FIG. 3 is an assembled vertical sectional view showing a stopper in the embodiment.

FIG. 4 is an assembled vertical sectional view showing a conventional metal fitting for a temporary scaffolding frame.

[Explanation of symbols]

2 connection member 3 connection hole 11 cylinder 11a opening end 11b lower part of inner peripheral surface of cylinder 12 notch 15 locking piece 15a free end of locking piece 15b base end of locking piece 17 inclined surface 18 spring Member 18c Cylinder body hanging side end 18d of spring member Central bent portion H of spring member Projection amount for preventing M M Temporary scaffolding frame

Claims (1)

[Scope of utility model registration request] 1. A it to the side on the tubular body 11 to the coupling hole 3 is to be inserted so as to project a predetermined position of the temporary scaffolding frame M connecting member 2
Notch 1 having a substantially long hole shape extending from the open end 11a of the
2 is formed, the engaging piece 15 free end 15a facing the side opposite to the projecting direction of <br/> cross section substantially inverted U-shape that enables project and retract from the notch 12 of the tubular body 11 The base end 15b of the pin 1
While pivotally to the cylinder 11 by 3, the tubular body 11
The free end of the locking piece 15 that abuts on the lower portion 11b of the inner peripheral surface of the
An inclined surface 17 that defines the amount of protrusion H for preventing slippage at 15a is formed at the lower end of the base end portion 15b of the locking piece 15 , and the locking is performed.
Between the piece 15 and the cylindrical body 11, a substantially V-shaped spring in side view is provided.
The central bending portion 18d of the spring member 18 locks the member 18.
Located within the free end 15 a of the piece 15 and of the spring member 18.
Both ends 18a, 18b are located near the pin 13
The locking piece 15 is always attached in a direction protruding from the notch 12.
The cylindrical body of the spring member 18 is hung so as to urge
A metal fitting for a temporary scaffolding frame, characterized in that the hanging side end 18c is engaged in the locking piece 15 .