JPH108711A - Connection device and stopper for scaffold member - Google Patents

Abstract

(57) [Summary] [Problem] By simply fitting a fitting portion of one scaffold member into a tenon portion of the other scaffold member, the pin member can be engaged with the engaging hole and can be prevented from coming off and can be unexpectedly released. The present invention proposes a device for preventing a scaffold member from being removed, which is not likely to be removed, and which can be easily released. SOLUTION: A pin member 9 which penetrates an engagement hole 6 from the inside of a tenon portion 3 and protrudes from the outer periphery of a fitting portion 5 and a leaf spring 8 which urges and protrudes is provided. When the fitting portion 5 is fitted, the first inclined surface 13 is formed so that the tip of the fitting portion 5 engages to retreat the pin member 9 inward in the radial direction, and the outer periphery of the fitting portion 5 of the pin member 9. When the protruding portion is pressed and retracted against the urging force of the leaf spring 8 to rotate the fitting portion 5 in the circumferential direction with respect to the tenon portion, the periphery of the engagement hole 6b on the fitting portion 5 side is reduced. A second inclined surface 14 that engages with the edge in the direction and retracts the pin member 9 radially inward is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to automatically prevent the detachment of a scaffold member by a simple connecting operation and to prevent the detachment of the scaffold member from being accidentally released. The present invention relates to a connecting device and a stopper for a scaffold member.

[0002]

2. Description of the Related Art A conventional scaffolding member connecting device is provided with a tenon at the tip of one of the scaffolding members to be normally connected to each other.
At the base end of the other scaffold member, there is provided a fitting portion that fits into the tenon, and an engaging hole that penetrates the fitting portion and the tenon that are fitted to each other in the diameter direction is provided. The pin member is inserted and engaged to prevent the tenon and the fitting portion from coming off.

Therefore, at the time of connection work, it is necessary to insert a pin member into an engagement hole after fitting a fitting portion at a base end portion of the other scaffold member into a tenon portion at a distal end portion of one scaffold member. It is.

[0004]

However, in the above-described conventional scaffold member connecting device, there is no possibility that the retaining is unexpectedly released in the connected state, and a highly reliable connection state can be obtained. Not only is it necessary to perform a two-stage operation as described above, but in particular, the operation of aligning the engagement holes of the fitting portion and the tenon portion and inserting the pin member into the engagement holes is a considerably time-consuming operation. Since it is necessary to pay attention to avoid forgetting to insert the pin member, there is a problem that the working efficiency is very poor.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention can prevent a pin member from being disengaged by merely engaging a tenon portion with a fitting portion to engage with an engaging hole and accidentally releasing the pin member. It is an object of the present invention to propose a scaffold member retaining device and a retaining device which have no trouble and can be easily released.

[0006]

In order to achieve the above-mentioned object, according to the present invention, there is provided a scaffold member according to the present invention. 3 is fitted with the fitting portion 5 at the base end of the other scaffold member 2, and the pin member 9 is engaged with the engaging hole 6 formed by penetrating the peripheral wall of the tenon portion 3 and the fitting portion 5. A connecting device for a scaffold member for retaining the tenon portion 3 and the fitting portion 5, wherein the pin member 9 penetrates through the engagement hole 6 from inside the tenon portion 3 and protrudes from the outer periphery of the fitting portion 5. And springs 8 and 18 for urging the pin member 9 to project therefrom, and fitting the fitting portion 5 into the tenon portion 3 at a portion outside the vicinity of the outer periphery of the tenon portion 3 of the pin member 9. A first inclined surface 13 for engaging the tip of the portion 5 and retracting the pin member 9 radially inward is formed,
A portion of the pin member 9 protruding from the outer periphery of the fitting portion 5 is pressed and retreated against an outer portion of the vicinity of the outer periphery of the fitting portion 5 against the urging force of the springs 8 and 18 so that the tenon portion 3 is formed. A second inclined surface 14 that engages with the circumferential edge of the engaging hole 6b on the fitting portion 5 side when retracted in the circumferential direction to retreat the pin member 9 radially inward. This configuration is adopted.

According to the present invention, a pair of engagement holes 6 are formed in the mortise portion 3 and the fitting portion 5 in the diameter direction thereof, and the springs are constituted by leaf springs 8 and 18. Further, a pair of pin members 9, 9 which are engaged with the pair of engagement holes 6, 6 are fixed to both ends thereof, and the configuration according to claim 1 is adopted.

According to a third aspect, the pin member 9 is provided.
Is formed by forming a truncated conical portion 10 at the distal end of a round shaft portion, and cutting off an inclined cutting surface 11 from the outer periphery at an intermediate position in the axial center direction of the round shaft portion toward a substantially axial center position of the distal end surface. , Inclined cutting surface 11
The first inclined surface 13 is constituted by the conical surface of the truncated conical part 10, and the second inclined surface 14 is constituted by the constitution according to claim 1 or 2.

According to a fourth aspect of the present invention, the pin member 9 is engaged with the engaging hole 6 formed by penetrating the mortise portion 3 and the peripheral wall of the fitting portion 5 of the scaffold member fitted to each other. Mortise section 3
And a pin member 9 having a length protruding from the outer periphery of the fitting portion 5 through the engagement hole 6 from the inside of the tenon portion 3. Springs 8 and 18 for urging the pin member 9 to protrude therefrom, and the pin member 9 has a tip end of the fitting portion 5 when the fitting portion 5 is fitted into the tenon portion 3 from the vicinity of the outer periphery of the tenon portion 3 to the outer portion. A portion having a first inclined surface 13 for engaging and retracting the pin member 9 radially inward, and protruding from the vicinity of the outer periphery of the fitting portion 5 to the outer portion from the outer periphery of the fitting portion 5 of the pin member 9. Is pressed and retracted against the urging force of the springs 8 and 18 to rotate the fitting portion 5 in the circumferential direction with respect to the tenon portion 3.
And a second inclined surface 14 that engages with a circumferential edge of the first member to retreat the pin member 9 radially inward.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A connecting device for a scaffold member according to one embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes one scaffold member to be connected to each other, 2 denotes the other scaffold member, and a small-diameter tenon portion 3 having a small diameter and an appropriate length is provided at the tip of one scaffold member 1. I have. The tenon part 3 is formed of a small-diameter pipe material fitted and fixed in a pipe material constituting the scaffold member 1, and the tip thereof is formed into a tapered portion 4 by drawing in an arc-shaped cross section. Of course, it may be formed in a tapered shape instead of a circular arc shape. Reference numeral 5 denotes a fitting portion provided at the base end portion of the other scaffold member 2 so as to fit into the tenon portion 3. The tenon portion 3 is formed to have a diameter that the fitting portion 5 just fits, and is tapered. The part 4 is formed so that the fitting part 5 can be easily fitted outside. A pair of engaging holes 6 are formed in the diameter direction so as to penetrate the peripheral wall of the tenon 3 and the peripheral wall of the fitting 5 in a state where the fitting 5 is fitted to the lower end of the tenon 3. The engaging hole 6 is provided on the tenon portion 3 side.
a and the engaging hole 6b on the side of the fitting portion 5 are concentrically opposed to each other.

Numeral 7 denotes a stopper for preventing the two parts from coming off when the fitting part 5 is fitted to the tenon part 3, and as shown in FIGS. And a pair of engaging holes 6 formed by bending the
6 is constituted by a pair of pin members 9 fixed to the outer surfaces of both ends of the leaf spring 8 so as to engage with the pin spring 6. The leaf spring 8 is formed so that both ends are pressed against the inner periphery of the tenon 3 by being inserted from the tip of the tenon 3.

The pin member 9 is formed of a short round shaft-shaped member. A truncated cone portion 10 is formed at the front end of the pin member 9, and the front end surface is substantially cut from the outer periphery at an intermediate position of the round shaft portion in the axial center direction. It is configured by cutting off at the inclined cutting surface 11 toward the axis center position. The base end face has a different diameter portion 12a (see FIG. 3C).
A protrusion 12 having a convex shape is projected, and is fixed to the leaf spring 8 by caulking the protrusion 12.

The inclined cut surface 11 is provided with the pin member 9 in the engagement hole 6.
When the fitting portion 5 is fitted into the tenon portion 3, the tip of the fitting portion 5 is engaged with the pin member. 9 constitutes a first inclined surface 13 for retreating the inner side in the radial direction.

The truncated conical portion 10 is formed so as to be located from the vicinity of the outer periphery of the fitting portion 5 to the outside in a state where the pin member 9 is engaged with the engagement hole 6, and the fitting is performed in that state. Regardless of whether the part 5 is pulled out of the tenon part 3 or is rotated in the circumferential direction, the round shaft part of the pin member 9 has the engagement holes 6a, 6
b to prevent pulling out and rotation. On the other hand, the pin member 9 is pressed against the urging force of the leaf spring 8.
Of the frustoconical portion 10, the conical surface of the frustoconical portion 10 is positioned outside from the vicinity of the outer periphery of the tenon portion 3 so that the conical surface of the frustoconical portion 10 in the circumferential direction of the engaging hole 6b on the fitting portion 5 side. The conical surface of the truncated conical portion 10 retracts the pin member 9 radially inward when the fitting portion 5 is rotated in the circumferential direction with respect to the tenon portion 3. It constitutes a second inclined surface 14 to be moved.

In the scaffold member connecting device having the above-described structure, when the fitting portion 5 at the base end of the other scaffold member 2 is fitted into the tenon portion 3 at the tip of one scaffold member 1, the fitting portion When the tip of the pin 5 engages with the first inclined surface 13 of the pin member 9 and further pushes the fitting portion 5, the pin member 9 mortises against the urging force of the leaf spring 8 as shown in FIG. Retreat to the inside of part 3,
The tip of the pin member 9 is movably engaged with the inner peripheral surface of the fitting portion 5. Then, the fitting portion 5 is left as it is with the tenon portion 3.
And the pin member 9 is engaged with the engaging hole 6 on the fitting portion 5 side.
b, the pin member 9 is automatically fitted and engaged in the engagement hole 6b by the urging force of the leaf spring 8, as shown in FIG.
The fitting part 5 and the tenon part 3 are prevented from coming off.

At this time, a pair of engaging holes 6 are formed in the diameter direction, and a pair of pin members 9 are engaged with the pair. The action of preventing the mortise portion 3 and the fitting portion 5 from coming out is stably obtained,
Further, since the mortise section 3 and the fitting section 5 are rotated half a turn, the engagement hole 6 and the pin member 9 can be always engaged. When the pin member 9 is not completely engaged with the engagement hole 6b on the fitting portion 5 side at the time of connection,
The incomplete engagement state can be easily and immediately visually detected even from a distant position while performing the connection work because the truncated conical part 10 at the tip of the connection part does not protrude to the outer periphery of the fitting part 5. Confirmation is easy.

Further, when the tenon portion 3 and the fitting portion 5 are connected, the pin member 9 is engaged with the engagement holes 6a and 6b, and the truncated cone portion 10 is moved outward from the vicinity of the outer periphery of the fitting portion 5. Even if it tries to pull out the fitting part 5 from the tenon part 3 or to rotate it in the circumferential direction in that state, the round shaft part of the pin member 9 is inserted into the engagement holes 6a and 6b. Engagement is reliably performed to prevent the extraction and rotation, and even when a complicated extraction force that generates a component in the rotation direction is applied, the extraction can be reliably prevented, and a highly reliable connection state can be obtained.

On the other hand, when the connection between the scaffold members 1 and 2 is released, the truncated cone portion 10 at the tip end of the pin member 9 protruding from the outer periphery of the fitting portion 5 is indicated by an arrow a in FIG. The truncated conical portion 10 is positioned from the vicinity of the outer periphery of the tenon portion 3 to the outside, and the fitting portion 5 is rotated in either direction as shown by a white arrow b in this state. , The second inclined surface 14 comprising the conical surface of the truncated cone portion 10
Is engaged with the circumferential edge of the engagement hole 6b on the fitting portion 5 side, and the pin member 9 is retracted radially inward, and is engaged with the pin member 9 as shown in FIG. Since the engagement of the hole 6b is released, the fitting portion 5 can be pulled out from the tenon portion 3 as it is.

According to the present embodiment, the connection and disassembly of the scaffold members 1 and 2 can be performed by one-touch operation or substantially the same simple operation as described above, and workability is improved. A pin member 9 having an engagement hole 6a in the tenon portion 3 and an engagement hole 6b in the fitting portion 5 and having a first inclined surface 13 and a second inclined surface 14 in the arched leaf spring 8 is formed. Since it is only necessary to attach a stopper 7 having a simple structure in which the pin is fixed, it can be manufactured at a low cost. In particular, the pin member 9 has a truncated conical portion 10 formed at the tip of a round shaft-shaped member. Since one portion of the outer peripheral portion can be formed only by partially cutting off the inclined cutting surface 11, the number of processing steps can be reduced, and the device can be manufactured at low cost.

The retaining member 7 comprising the pin member 9 and the leaf spring 8 is provided with a conventional tenon portion 3, a fitting portion 5 and an engaging hole 6.
Can be applied as it is to the scaffolding member on which the connection device is formed, and the connection device can be implemented simply by attaching the stopper 7 to the conventional product.

In the above-described embodiment, an example is shown in which the retaining member 7 having the arch-shaped leaf spring 8 is inserted and fitted in the tenon portion 3 in the axial direction thereof, as shown in FIG. To
An arc-shaped leaf spring 18 fitted to the inner peripheral surface of the tenon part 3 and a pin 17 fixed to both ends of the pin member 9.
May be used, and in this case, the same operation and effect as described above can be obtained.

[0023]

According to the first aspect of the present invention, when the fitting portion of the base end portion of another scaffold member is fitted into the tenon portion of the scaffold member and pushed in, the first inclination of the pin member is reduced. The pin member is retracted to the inside of the tenon portion against the urging force of the spring due to the engagement between the surface and the front end of the fitting portion, and the fitting portion is fitted to the end of the tenon portion as it is, and the pin member is located on the fitting portion side. When the pin member is matched with the engagement hole, the pin member automatically engages with the engagement hole, preventing the fitting portion and the tenon from coming off, and furthermore, the second inclined surface of the tip end portion of the pin member is fitted in the connected state. Because it is located outside from the vicinity of the outer periphery of the joint, even if you try to pull out the fitting part from the tenon, or rotate it in the circumferential direction, the round shaft part of the pin member is securely inserted into the engagement hole. When a complicated extraction force is applied that generates a component in the direction of rotation, But certainly escape can be prevented, a highly reliable connection state is obtained.

Further, when the connection of the scaffold member is released, the tip of the pin member protruding from the outer periphery of the fitting portion is pressed so that the second inclined surface is positioned outward from the vicinity of the outer periphery of the tenon portion. By rotating the mating portion, the second inclined surface is engaged with the circumferential edge of the engaging hole on the mating portion side, and the pin member is retreated radially inward, and is fitted with the pin member. Since the engagement with the engaging hole on the side of the part is released, the fitting part can be pulled out of the tenon part as it is, so that the connection and disassembly of the scaffold member can be performed with one touch or almost the same simple operation. Yes, workability is improved.

Also, it has a simple structure comprising a tenon portion having an engagement hole, a fitting portion, and a retaining member formed by fixing a pin member to a spring. It only needs to be fitted with a stopper so
Exchange is easy.

According to a second aspect of the present invention, a pair of engaging holes are formed in the tenon portion and the fitting portion in the diametrical direction, and a pair of pins which are engaged with the pair of engaging holes at both ends of the leaf spring. Since the member is fixed and the mortise portion and the fitting portion are prevented from coming off by the engagement of the pair of diametrically engaging holes and the pin member, the removal preventing action is stably obtained, and the tenon portion and the fitting portion are prevented from coming off. Is rotated half a turn, the engagement hole and the pin member can always be engaged.

According to a third aspect of the present invention, the pin member has a truncated conical portion forming a second inclined surface at the tip of the round shaft portion, and the outer periphery of the round shaft portion at an intermediate position in the axial center direction. Since the pin member is cut away from the inclined cutting surface constituting the first inclined surface toward the substantially axial center position of the distal end surface, the pin member having the first and second inclined surfaces is processed with less processing. Man-hours can be manufactured, and the stopper can be obtained at low cost.

Further, according to the fourth aspect, the connection device can be implemented with a conventional product by applying a retaining member formed of a pin member and a leaf spring to the conventional product.

[Brief description of the drawings]

1A and 1B show a connection state of an embodiment of a scaffold member connection device of the present invention, in which FIG. 1A is a longitudinal front view, and FIG. 1B is a cross-sectional plan view.

FIG. 2 is a front view of a natural state before mounting the stopper of the embodiment.

FIG. 3 shows details of a pin member according to the embodiment;
(A) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 4 is a vertical sectional front view showing an operation at the time of a connection operation in the embodiment.

FIG. 5 is a cross-sectional plan view showing a process of a retaining release operation in the embodiment.

FIG. 6 is a cross-sectional plan view showing a state in which a retaining member is attached to a tenon in another embodiment of the present invention.

[Description of Signs] 1 One scaffolding member 2 The other scaffolding member 3 Mortice portion 5 Fitting portion 6 Engaging hole 6b Engaging hole on fitting portion side 7 Retaining stopper 8 Leaf spring 9 Pin member 10 Truncated conical portion REFERENCE SIGNS LIST 11 inclined cut surface 13 first inclined surface 14 second inclined surface 17 retaining member 18 leaf spring

Claims (4)

[Claims] An engaging hole formed by fitting a fitting portion at a base end of another scaffold member to a tenon portion at a distal end portion of the scaffold member and penetrating a peripheral wall of the tenon portion and the fitting portion. A connecting device for a scaffolding member for engaging a member to prevent the tenon and the fitting portion from coming off, wherein the pin member penetrates through the engagement hole from the inside of the tenon portion and protrudes from the outer periphery of the fitting portion. And a spring for urging and projecting the pin member is provided, and a pin is engaged with the tip of the fitting portion when the fitting portion is fitted into the tenon from the vicinity of the outer periphery of the tenon to the outside of the tenon. A first inclined surface for retreating the member radially inward is formed, and a portion protruding from the outer periphery of the fitting portion of the pin member is formed on the outer portion from the vicinity of the outer periphery of the fitting portion against the urging force of the spring. When the fitting part is pressed and retracted and rotated in the circumferential direction with respect to the tenon, the circumferential direction of the engaging hole on the fitting part side A connecting device for a scaffolding member, wherein a second inclined surface is formed for engaging the opposite edge to retreat the pin member radially inward. 2. A pair of engaging holes are formed in a tenon portion and a fitting portion in the diameter direction thereof, and a spring is constituted by a leaf spring. The scaffold member connection device according to claim 1, wherein the pin member is fixed. 3. The pin member has a frusto-conical portion formed at the distal end of the round shaft portion, and is formed with a cutting surface inclined from the outer periphery of the round shaft portion in the axial center intermediate position toward the substantially axial center position of the distal end surface. Cut and configured,
The connecting device for a scaffold member according to claim 1 or 2, wherein the first inclined surface is constituted by the inclined cut surface, and the second inclined surface is constituted by the conical surface of the truncated cone portion. 4. A scaffold for engaging a pin member in an engagement hole formed by penetrating a tenon portion of a scaffold member and a peripheral wall of a fitting portion fitted together to prevent the tenon portion and the fitting portion from coming off. A pin member having a length that penetrates through an engagement hole from the inside of a tenon portion and protrudes from an outer periphery of a fitting portion, and a spring that protrudes and biases the pin member; Has a first inclined surface that engages with a front end of the fitting portion to retreat the pin member radially inward when the fitting portion is fitted into the tenon portion, from the vicinity of the outer periphery of the tenon portion to the outer portion, The portion protruding from the outer periphery of the fitting portion of the pin member is pressed and retreated against the urging force of the leaf spring from the vicinity of the outer periphery of the fitting portion to the outer portion, and the fitting portion is rotated in the circumferential direction with respect to the tenon portion. When the pin member is engaged with the circumferential edge of the engagement hole on the fitting portion side to retract the pin member radially inward, A stopper for a scaffold member having two inclined surfaces.