JPH08260691A - Connection structure of scaffolds - Google Patents

Abstract

PURPOSE: To easily release the connection of a support and a joint, by fitting a lock mechanism connecting the vertical support and the joint at least at one of the peripheral walls of the upper and lower ends of the vertical support and moving down the unlocking lever of the lock mechanism. CONSTITUTION: When upper and lower standards provided with a vertical support 6 are connected to each other, the lower insert 17 of a joint 2 is inserted in the upper end of the vertical support 6 of the lower standard and the lower locking pin 12 is fitted in the vertical support 6 by means of the lower flat spring. The lower end of vertical support 6 is fitted on the upper insert of the joint 2 and the locking pin 31 of the lock mechanism is fitted in the fixing hole of the locking pin of the joint 2 by means of the flat spring 32 to form the scaffolds. When the scaffolds are disassembled, the pushing part 42 of the lock mechanism is pushed from the upper side to shift the locking pin 31 to the outside and remove the locking pin 31 from the insertion hole of the joint 2 and unlock it. Accordingly, the lock mechanism can be easily unlocked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold frame connection structure.

[0002]

2. Description of the Related Art A scaffolding frame A that has been conventionally used for construction work, etc.
As shown in FIG. 1, a large number of building frames 1 are configured to be three-dimensional and self-supporting by using joints, braces 3, and the like.

The building frames 1,1 are constructed by vertically erected horizontal beams 7,8 between the upper and lower ends of two round pipe-shaped vertical columns, which are arranged in parallel. A substantially rectangular building frame 1,1 with protruding ends is formed, and a scaffolding plate 9 can be installed between the upper lateral beams 7 of the facing building frames 1,1 as required.

Further, as shown in FIG. 7, engaging holes d are formed in the upper and lower ends of each vertical column a for inserting a lock pin c of a joint b described below.

The joint b is an upper and lower insertion portion e, f formed in a substantially round pipe shape so as to be inserted into the upper and lower end portions of the vertical column a.
And a flange portion g formed between the upper and lower insertion portions e and f for restricting the insertion depth of the upper and lower insertion portions e and f. A lock pin c urged outward by an unillustrated means is provided so as to be freely inserted and removed, and when the vertical insertion portions e and f are inserted into the upper and lower ends of the vertical support column a, the lock pin c is engaged with the engagement hole d. The vertical support column a and the joint b are locked by being fitted in.

A substantially rectangular lock release lever insertion hole h is formed in the peripheral wall of the flange portion g, and the outer end of the elongated plate-shaped lock release lever j is projected from the lock release lever insertion hole h. The inner end portion of the lock release lever j is interlockingly connected to the lock pin c, and the outer end of the lock release lever j is pressed inward, whereby the lock pin c
Back until it is flush with the peripheral surfaces of the upper and lower insertion parts e and f,
The lock between the vertical support column a and the joint b can be released, and further, the lock release state can be maintained by moving the lock release lever j downward while pushing the lock release lever j inward. .

In order to connect a plurality of building frames in the vertical direction, the vertical insertion portions of the joint b are attached to the upper and lower ends of the vertical columns a, a.
By simply inserting e and f respectively, the lock pin c fits into the engagement hole d, locks the vertical columns a and a of the upper and lower building frames and the joint b, and the upper and lower vertical columns a and a. Can be connected.

In order to disassemble the connected building frames, the lock release lever j projecting from the peripheral wall of the flange portion g is pressed inward, whereby the lock pin c is retracted inward and the engaging hole is formed. By releasing the engagement with d, the lock between the vertical support a and the joint b is released,
The upper and lower insertion parts e and f of the joint b can be pulled out from the end of the vertical column a.

[0009]

However, since the lock release lever j has an elongated plate shape and the shape of the protruding portion, especially the area of the pressing surface is small, the lock release lever j is disassembled when the scaffold frame A is disassembled. Is difficult to press, and when the movement of the lock pin c becomes uncomfortable due to slight deformation and rust of the ends of the vertical columns a and the vertical insertion parts e and f, or intrusion of soil, more force is required to press the lock release lever j. In combination with the fact that the pressing surface is small, it is difficult to press the scaffolding frame A.
The decomposition of was complicated.

It is possible to kick the lock release lever j with a shoe or hit it with a hammer, but since the pressing surface is small as described above, sufficient pressing force cannot be obtained due to the deformation of the shoe. When hitting with a hammer, there is a risk that the lock release lever j may be deformed or the vertical support column a or the joint b may be bent.

[0011]

According to the present invention, in a scaffolding frame constructed by vertically connecting a plurality of building frames, each having a vertical pillar, through joints inserted in the upper and lower ends of the vertical pillar, the vertical pillar is formed. On at least one peripheral wall of the upper and lower ends,
A lock mechanism that connects the vertical support and the joint is attached, and a lock release lever is provided in the lock mechanism, and the connection between the vertical support and the joint can be released by moving the lock release lever downward. It is intended to provide a joint structure for the scaffolding frame.

It also has the following features.

A substantially horizontal pressing portion is provided on the upper end of the lock release lever so as to extend outward.

In the lock mechanism, a lock pin insertion hole is formed in the peripheral wall of the vertical column, and the lock pin is slidably inserted from the outside into the lock pin insertion hole to form the lock pin in the peripheral wall of the joint. The lock pin can be inserted into the lock pin engaging hole, and the lock pin inserted into the lock pin engaging hole of the joint can be pulled out by downward movement of the lock release lever.

A small diameter portion is formed in the middle of the lock pin, and a plate spring for urging the lock pin in the locking direction is provided. The plate spring has a large hole portion slightly larger than the outer diameter of the lock pin. Form a pin locking hole consisting of a substantially rectangular small hole that is larger than the small diameter part of the lock pin connected to the large hole and smaller than the outer diameter of the lock pin. The small diameter part of the lock pin is engaged.

The free end of the leaf spring is extended obliquely upward to form an oblique sliding surface, and the lock mechanism is provided with a long hole into which a lock pin is inserted and an angled bent portion protruding outward. The lock release lever is formed so as to be slidable up and down, and the lower inclined surface of the same angled bent portion and the slanted slide surface are brought into sliding contact with each other. Pull out the lock pin.

The base cylinder is externally fitted to the end of the vertical column, and the base cylinder and the lock mechanism housing for housing the lock mechanism are integrally formed.

[0018]

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

FIG. 1 shows a scaffolding frame A having a vertical strut coupling structure according to the present invention. The scaffolding frame A is a three-dimensional structure using a large number of building frames 1 with joints 2 and braces 3. It is structured to be self-reliant.

Reference numeral 4 is a caster for moving the scaffolding frame A, and 5 is a jack for fixing the scaffolding frame A and holding the scaffolding frame A horizontally by extending the jack to bear the weight of the scaffolding frame A. It is a thing.

In the building frame 1, two vertical pipes 6 and 6 each having a circular pipe shape are erected in parallel, and upper and lower horizontal beams 7 and 8 are installed between the upper and lower ends of the vertical pipes 6 and 6 respectively. A substantially rectangular building frame 1 with protruding upper and lower ends is formed. If necessary, a plurality of scaffolding boards 9 can be installed between the upper and horizontal beams 7 of the facing building frames 1 and 1 to be used as a scaffold. I am able to

Reference numeral 10 denotes an auxiliary vertical pipe connecting the central portions of the upper and lower horizontal beams 7 and 8, and the auxiliary vertical pipe 10 and one of the vertical columns 6
A plurality of auxiliary horizontal beams 11 are installed between the and so that they can be used as a ladder.

Further, a lower lock pin engaging hole 13 for fitting a lower lock pin 12 provided at a lower portion of the joint 2 to be described below is formed at an upper end portion of each vertical strut 6 and A lock mechanism mounting portion 15 accommodating a lock mechanism 14 for locking the upper portion of the joint 2 is externally fitted to the lower end of the column 6.

As shown in FIG. 2, the joint 2 includes upper and lower insertion portions 16 and 17 formed in a substantially circular pipe shape so as to be inserted into the upper and lower end portions of the vertical column 6, and the upper and lower insertion portions 16 and 17. It is composed of a flange portion 18 for regulating the insertion depth of the upper and lower insertion portions 16 and 17 formed between them, and a lower lock pin insertion hole 19 is formed in the peripheral wall of the lower insertion portion 17 to form the lower lock pin. The vertical lock 6 is provided with a lower lock pin 12 which is urged outward by a lower plate spring 20 having a substantially U-shape through an insertion hole 19 so as to be freely inserted and removed.
When the lower insertion portion 17 of the joint 2 is inserted into the upper end portion of the lower support pin 12, the lower lock pin 12 moves into the lower lock pin engagement hole 13 of the upper end portion of the vertical column 6.
And the upper end of the vertical column 6 and the lower part of the joint 2 are locked.

In the figure, 21 is a lock pin engaging hole for inserting a lock pin 31 of a lock mechanism 14 which will be described later, 22 is a tapered portion formed in a substantially conical shape for facilitating insertion of the upper insertion portion, 23 Is a positioning hole for preventing the lower plate spring 20 from shifting, 24 is a projection formed on the lower plate spring 20 for fitting in the positioning hole 23, and 25 is a chamfered part for facilitating insertion of the lower insertion part 17. , 26 are spherical portions for facilitating sliding of the lower lock pin 12.

As shown in FIGS. 3 to 6, the lock mechanism mounting portion 15 has a round pipe-shaped base tubular body 27 fitted around the lower end of the vertical column 6 and has a substantially U-shaped cross section. Part 28
Is integrally formed by means of extrusion processing or the like, and the lock mechanism 14 is housed inside the lock mechanism housing portion 28.

In the lock mechanism mounting portion 15, a member having a substantially U-shaped cross section forming the lock mechanism accommodating portion 28 is provided on the outer periphery of the round pipe-shaped member forming the base tubular body 27 by means such as welding. The lock mechanism mounting part
15 can also be formed.

As shown in FIGS. 3 to 6, the lock mechanism 14 includes an outer wall 29 of the lock mechanism accommodating portion 28, a peripheral wall of the base cylinder 27 and the vertical support 6, and an outer wall of the lock mechanism accommodating portion 28. Lock pin insertion hole 30 and lock pin through hole 30
a and form a lock pin insertion hole 30 and a lock pin through hole.
It comprises a lock pin 31 slidably inserted in 30a, a leaf spring 32 for biasing the lock pin 31 inward, and a lock release lever 33 for moving the lock pin 31 forward and backward.

As shown in FIGS. 3 to 5, the lock pin 31 has a substantially cylindrical shape with a small diameter portion 34 formed in the middle thereof, and the inner end portion of the lock pin 31 has an upper insertion portion 16 of the joint 2. When inserting the lower end of the vertical column 6 into the taper 22 of the upper insertion portion 16.
And a circular conical portion 35 for sliding the lock pin 31 outward is formed.

The leaf spring 32 is bent into a substantially U-shape, and has a large hole portion 36, which is slightly larger than the outer diameter of the lock pin 31, and a small diameter portion 34 of the lock pin 31 therebelow, which is located in the upper middle portion. A substantially rectangular small hole portion 37 that is substantially smaller than the outer diameter of the lock pin 31 forms a substantially keyhole-shaped pin locking hole 38, and the center of the large hole portion 36 is the axis of the lock pin insertion hole 30. By aligning with the core, inserting the lock pin 31 into the lock pin insertion hole 30, and then shifting the plate spring 32 upward, the small pin portion 37 of the substantially keyhole-shaped pin locking hole 38 of the lock pin 31 Small diameter part
The upper end portion of the inner side of the leaf spring 32 extends obliquely upward and upward to form an oblique sliding surface 39.

The outer end portion of the leaf spring 32 is fixed to the inner surface of the outer wall 29 of the lock mechanism housing portion 28 by a stop screw 40.

As shown in FIGS. 3 and 6, the lock release lever 33 has a vertically long and substantially rectangular sliding cam portion 41 and a substantially elliptical pressing member which is horizontally connected to the upper end of the sliding cam portion 41. And part 42.

A vertically long slot 43 for inserting the lock pin 31 is formed in the middle of the sliding cam section 41.
The mountain-shaped refraction part is formed by refracting the part 43 in the outward direction into a substantially mountain shape.
44 is formed, the lower inclined surface 45 of the same angled bent portion 44 is brought into sliding contact with the slanted sliding surface 39 of the leaf spring 32, and the lock pin 31 is interlocked with the downward sliding of the lock release lever 33. The lock pin 31 is moved outward, and the lock pin 31 is moved inward by the bias of the plate spring 32 in conjunction with the upward movement of the lock release lever 33.

When the upper and lower building frames 1 and 1 are connected with each other by such a structure, first, the lower insertion portion 17 of the joint 2 is inserted into the upper end portion of the vertical column 6 of the lower building frame 1, and the lower plate spring 20 is inserted. By fitting the lower lock pin 12 into the lower lock pin engagement hole 13 formed in the upper end portion of the vertical column 6 by biasing, the joint 2 can be locked to the upper end portion of the vertical column 6 so that the joint 2 cannot be inserted or removed.

At this time, the chamfered portion 25 formed at the lower end of the lower insertion portion 17 and the spherical portion 26 formed at the outer end of the lower lock pin 12 can smoothly perform the insertion and the locking.

Next, the lower end portion of the vertical column 6 of the upper building frame 1 is externally fitted to the upper insertion portion 16 of the joint 2, and the upper insertion portion of the joint 2 is fitted.
By locking the lock pin 31 of the lock mechanism 14 into the lock pin engagement hole 21 formed in the peripheral wall 16 by the biasing force of the leaf spring 32, the lower end of the vertical column 6 is locked in the joint 2 so that it cannot be inserted or removed. You can

At this time, the tapered portion formed on the upper end of the upper insertion portion 16
22 and the conical portion 35 formed on the lock pin 31, the insertion and locking can be smoothly performed.

When the lock is released in order to disassemble the scaffolding frame A, when the pressing portion 42 of the lock mechanism 14 is pressed from above, the angled bending portion formed on the sliding cam portion 41 is formed.
By sliding contact between the inclined surface 45 of 44 and the slanting sliding surface 39 of the leaf spring 32, the lock pin 31 is moved outward and the lock pin 31 is pulled out from the lock pin insertion hole 21 of the joint 2. , The lock can be released, and then the upper building frame 1 is moved upward, and the upper insertion portion 16 of the joint 2 is pulled out from the lower end portion of the vertical column 6, so that the upper and lower building frames 1, 1 Can be disassembled.

Since the outer end of the lower lock pin 12 fitted into the lower lock pin engaging hole 13 formed at the upper end of the vertical column 6 of the lower building frame 1 is pushed from the outside, the lock is released. In this state, the joint 2 can be pulled out.

Since the amount of protrusion of the joint 2 from the upper end of the vertical column 6 is small, it may be left as it is depending on the case.

[0041]

According to the present invention, in a scaffolding frame constituted by vertically connecting a plurality of building frames, each having a vertical pillar, through joints inserted in the upper and lower ends of the vertical pillar, the vertical pillars A lock mechanism that connects the vertical support and the joint is attached to at least one peripheral wall of the end, and a lock release lever is provided in the lock mechanism, and the vertical support and the joint are connected by moving the lock release lever downward. Due to the releasable structure, it is easy to apply a force to the lock release lever, and since this downward force is parallel to the axis of the vertical column, there is no risk of bending the vertical column.

By extending a substantially horizontal pressing portion outwardly on the upper end of the lock release lever, the pressing surface area for applying a downward force is widened. For example, the pressing surface is stepped down by shoes. Since the lock release lever can be slid downward by applying a large force without impact,
Even if it becomes difficult to insert or remove the lock pin, the lock can be easily released.

In the above lock mechanism, the lock pin insertion hole is formed in the peripheral wall of the vertical column, and the lock pin is slidably inserted from the outside into the lock pin insertion hole to form the lock pin in the peripheral wall of the joint. The lock pin can be inserted into the lock pin engaging hole, and the lock pin inserted into the lock pin engaging hole of the joint can be pulled out by the downward movement of the lock release lever. The connection between the column and the joint can be ensured.

A small diameter portion is formed in the middle of the lock pin, and a plate spring for urging the lock pin in the lock direction is provided. The plate spring has a large hole portion slightly larger than the outer diameter of the lock pin. Form a pin locking hole consisting of a small rectangular hole that is larger than the small diameter part of the lock pin that is connected to the large hole and is smaller than the outer diameter of the lock pin. By engaging the small-diameter portion of the lock pin, the plate spring and the lock pin can be engaged with each other without requiring any other member, and further, the engagement can be easily performed in a narrow space. .

The free end of the leaf spring is extended obliquely upward to form an oblique sliding surface, and the lock mechanism has a long hole into which a lock pin is inserted and an angled bent portion protruding outward. The lock release lever is formed so as to be slidable up and down, and the lower inclined surface of the same angled bent portion and the slanted slide surface are brought into sliding contact with each other. By pulling out the lock pin, the force applied to the unlock lever for unlocking can be made downward. Further, the unlocked state can be maintained by the sliding resistance between the inclined surface and the slanting sliding surface. The base tubular body and the lock pin mounting portion main body are formed by externally fitting the base tubular body on the end of the vertical column, and integrally forming the base tubular body and the lock mechanism housing portion for housing the lock mechanism. And can be manufactured easily and inexpensively by means such as extrusion processing.

[Brief description of drawings]

FIG. 1 is a perspective view of a scaffolding frame including a coupling structure according to the present invention.

FIG. 2 is a cross-sectional explanatory view of a joint.

FIG. 3 is an exploded perspective view of a lock mechanism.

FIG. 4 is a side view of a lock mechanism.

FIG. 5 is a vertical sectional view of a lock mechanism.

FIG. 6 is a cross-sectional view of a lock mechanism.

FIG. 7 is a perspective view showing a conventional coupling structure.

[Explanation of symbols]

 A Scaffolding frame 1 Building frame 2 Joint 6 Vertical column 14 Lock mechanism 15 Lock mechanism mounting part 16 Upper insertion part 17 Lower insertion part 27 Base cylinder 28 Lock mechanism storage part 30 Lock pin insertion hole 31 Lock pin 32 Plate spring 33 Unlock Lever 34 Small diameter portion 37 Small hole portion 38 Pin locking hole 39 Diagonal sliding surface 42 Pressing portion 43 Long hole 44 Angled bending portion 45 Sloping surface

Claims (6)

[Claims] 1. A joint in which a plurality of building frames (1) each having a vertical column (6) are inserted into the upper and lower ends of the vertical column (6).
In a scaffolding frame (A) that is vertically connected via (2), a lock that connects the vertical column (6) and the joint (2) to at least one peripheral wall of the upper and lower ends of the vertical column (6). Attach the mechanism (14), provide the lock mechanism (14) with the lock release lever (33), and move the lock release lever (33) downward to connect the vertical support (6) and the joint (2). A scaffolding frame coupling structure characterized by being configured to be releasable. 2. The scaffolding frame coupling structure according to claim 1, wherein a substantially horizontal pressing portion (42) is provided at an upper end of the unlocking lever (33) so as to extend outward. 3. The lock mechanism (14) has a lock pin insertion hole (30) formed in a peripheral wall of a vertical column (6), and a lock pin (31) is slid from the outside in the lock pin insertion hole (30). The lock pin (31) can be inserted freely into the lock pin engagement hole (21) formed in the peripheral wall of the joint (2), and the lock release lever (33) can be moved downward. The scaffold frame coupling structure according to claim 1, wherein the lock pin (31) inserted into the lock pin engagement hole (21) of the joint (2) is configured to be removable. 4. A small diameter part (3) is provided in the middle of the lock pin (31).
4) and a plate spring (32) for urging the lock pin (31) in the lock direction is provided.
A large hole (36) slightly larger than the outer diameter of the lock pin (31),
Pin locking consisting of a substantially rectangular small hole portion (37) larger than the small diameter portion (34) of the lock pin (31) connected to the large hole portion (36) and smaller than the outer diameter of the lock pin (31) Forming the hole (38), the small diameter portion (34) of the lock pin (31) is formed in the small hole portion (37) of the pin locking hole (38).
The scaffold frame coupling structure according to claim 1, wherein the scaffold frame is engaged with the scaffold frame. 5. The free end portion of the leaf spring (32) is extended obliquely outward and upward to form an oblique sliding surface (39), and the lock pin (31) is inserted into the lock mechanism (14). Long hole
(43) and a lock release lever (33) formed with an outwardly projecting chevron portion (44) are provided so as to be slidable up and down, and the inclined surface (45) below the chevron portion (44). And above slanted sliding surface (39)
The lock pin (31) is pulled out from the lock pin insertion hole (30) by slidingly contacting with the lock release lever (33) and sliding down the lock release lever (33). Bond structure. 6. A lock mechanism accommodating portion (28) for accommodating the base cylinder (27) and the lock mechanism (14) by externally fitting a base cylinder (27) to an end of a vertical column (6). ) Is integrally formed with the scaffold frame according to claim 1.