JPH051468A - Building frame for scaffold - Google Patents

Abstract

PURPOSE:To connect an upper and a lower building frames for a scaffold at one touch. CONSTITUTION:Connecting pins 2 are projectingly provided on the right and left upper end parts of a building frame main body 1, and the connecting pin 2 is provided with an engaging projection 3 which is projected from the side of the pin 2 and retreatingly movable inside the pin 2. The engaging projection 3 is provided with a spring 4 to energize the projection 3 to project from the side of the pin 2, and a sliding face 5 for loading retreating force on the projection 3 to the interior of the connecting pin 2 against the energizing force of the spring 4. Meanwhile, on the same part positions as the projecting direction of the engaging projections 3 on the side of the right and left lower end parts of a building frame main body 1, engaging holes 6 to be engaged with the engaging projections 3 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction frame for temporary scaffolding, which is suitable for sequentially assembling upwards.

[0002]

2. Description of the Related Art In a construction site of a building, in order to sequentially assemble the scaffolding frames upward, it is naturally necessary to provide a connecting means for connecting the scaffolding frames which oppose each other vertically.

Conventionally, as the connecting means, connecting pins are provided at the upper and lower ends of the scaffolding building frame on the lower side, and the left and right lower end parts of the upper scaffolding frame are inserted into the connecting pins. A type that locks a substantially arcuate locking lock arm from its side surface to connect both,
For example, as shown in Japanese Utility Model Laid-Open No. 1-131753, a connecting pin is loosely fitted between upper and lower scaffolding building frames, and the connecting pin is rotated by a required angle to thereby form an uneven portion on the scaffolding building frame and the connecting pin. There has been proposed a type in which the upper and lower scaffolding frames are connected to each other by engaging with each other.

[0004]

In each of the above-mentioned prior arts, in addition to the work of inserting the upper scaffolding frame into the connecting pins of the lower scaffolding frame, these upper and lower scaffolds are separated. It is necessary to lock the left and right lock arms between the two while holding the building frame, and to rotate the left and right connecting pins between the two, and at least two workers must perform the connecting work. However, there was a problem that the connection work was troublesome and inefficient.

The present invention has an object to solve these problems.

[0006]

In order to solve the above-mentioned problems, the present invention is provided with the reference numerals shown in the embodiments,
According to the first aspect of the present invention, the connecting pin 2 is projectingly provided on the left and right upper end portions of the building frame main body 1, the connecting pin 2 projects from the side surface thereof, and is retractable from the side surface into the connecting pin 2 An engaging projection 3 is provided, and the engaging projection 3 is provided with a spring 4 for biasing the projection 3 from the side surface of the connecting pin 2;
And a sliding surface 5 for loading a retraction force inside the connecting pin 2 against the biasing force of the A structure is provided in which an engagement hole 6 with which the engagement protrusion engages is provided.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the connecting pin 2 is located below the installation position of the engaging projection 3, and the spring 7 extends from the side surface of the connecting pin 2.
The connecting projection 8 is provided in the inside of the connecting pin 2 against the urging force of the spring 7 while being protruded by the connecting projection 8 on the upper side of the building frame body 1. A structure provided with a connecting hole 9 to be engaged is adopted.

[0008]

Operation: By inserting the lower end of the building frame body 1 of the upper scaffolding frame into the connecting pin 2 of the building frame body 1 of the lower scaffolding frame, the engaging projection 3 is inserted in the middle of the insertion.
When the lower end of the upper building frame body 1 comes into contact with the sliding surface 5 of the above, the engaging projection 3 receives a load that resists the urging force of the spring 4 and retracts inside the connecting pin 2. The engaging projection 3 is retracted into the inside of the connecting pin 2 by the retracting biasing force to allow the lower end of the building frame body 1 to be inserted into the connecting pin 2 on the lower side. When the engaging projection 3 of the lower building frame body 1 is inserted into the engaging hole 6 on the side surface of the lower end of the building, the engaging projection 3 is released from the retracting biasing force of the upper building frame body 1. Therefore, the engagement protrusion 3 is biased by the spring 4 and protrudes to engage with the engagement hole 6, so that the upper and lower scaffolding frames a and b are connected to each other. That is, simply inserting the lower end of the upper building frame body 1 into the connecting pin 2 of the lower building frame body 1 will automatically connect the two.

According to the second aspect, in addition to the function of the first aspect, when the connecting pin 2 is attached to the upper end portion of the building frame body 1, the connecting pin 2 is simply inserted into the upper end portion of the building frame body 1. The connecting projection 8 projecting from the connecting pin 2 engages with the connecting hole 9 provided in the building frame body 1, and the two are automatically connected and fixed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state before a lower scaffolding building frame a and an upper scaffolding building frame b are connected, and the scaffolding building frame is attached to the building frame body 1 and the left and right upper end portions thereof. It consists of a connecting pin 2. The building frame main body 1 includes the left and right vertical pipes 10, 10 and a horizontal pipe 11 and a vertical and horizontal pipes 1 that connect the both pipes 10, 10.
Reinforcing bars 12, 12 mounted between 0 and 11
The vertical pipes 10, 10 are provided with engaging holes 6 on the side surfaces of the lower ends thereof, and the connecting pins 2 are provided with engaging protrusions 3 that engage with the engaging holes 6.

As shown in FIG. 2, a connecting projection 8 is provided near the lower end of the connecting pin 2 so as to project from the side surface thereof.
Near the upper ends of the vertical pipes 10 and 10 of the building frame body 1, there are provided connection holes 9 with which the connection projections 8 engage.

In FIG. 3, the upper and lower building frame bodies 1, 1 are connected to the connecting pin 2.
1 shows the external appearance of the vertical pipes 10, 10 inserted, and FIG. 4 shows the internal structure of the connecting pin 2. Connecting pin 2
Is entirely made of a tubular material that penetrates vertically, and the pin center portion 2a is formed by the meat pressure so that the pin upper portion 2b and the pin lower portion 2c are formed.
Outer peripheral stepped portions 2d and 2e are formed between
Vertical pipe 10 of the upper building frame body 1 inserted into the lower building frame body 1 and the vertical pipe 1 of the lower building frame body 1 inserted into the pin lower portion 2c
0 means that the respective end faces are brought into contact with the outer peripheral stepped portions 2d and 2e to be positioned, and at that position, the engaging projections 3 of the connecting pins 2 are engaged with the engaging holes 6 at the lower end portion of the vertical pipe 10, and the vertical pipe is The connecting projection 8 of the connecting pin 2 engages with the connecting hole 9 at the upper end of the connecting pin 10.

The engagement projection 3 has a sliding surface 5 having a flat upper surface or a slightly rounded inclined surface at its tip as shown in FIG. The projection 3 has a connecting rod portion 13 extending downward from a base end portion thereof, and a lower end portion of the connecting rod portion 13 extending in the same direction as the engaging projection 3 from the lower end portion thereof.
A lever rod 14 that extends longer is integrally formed and is composed of a substantially U-shaped thick metal integral structure 15. As shown in FIG. 4, a substantially U-shaped leaf spring 4 is formed on the back side thereof. One end is fixed by caulking or spot welding, or a protrusion provided on the back side is engaged with a small hole provided in the leaf spring 14 to cooperate with each other, and the other end of the leaf spring 14 is fixed. The pin upper portion 2b is brought into contact with the inner peripheral surface of the pin upper portion 2b without being fixed, whereby the engaging projection 3 and the lever rod 14 constituting the metal integrated structure 15 are urged by the leaf spring 4 to respectively reach the pin upper portion 2b or It is adapted to project from the side surface of the thick portion 2a.

Furthermore, on the lower surface side of the lever rod 14,
An engagement step portion 16 having an important function is provided as described later.

A pair of connecting protrusions 8 on the lower side 2c of the connecting pin 2 are provided on the left and right. As shown in FIG. 4, both connecting protrusions 8 are formed by a leaf spring 7 having a substantially U-shaped cross section. Are linked to each other by fixing or engaging as described above, and the connecting projections 8 are connected to each other by the leaf springs 7 and
It is urged to project from the side surface of c.

In use, first, as shown in FIG. 4, the pin lower portion 2c of the connecting pin 2 is retracted into the connecting pin 2 against the biasing force of the leaf spring 7 by the connecting projection 8 protruding from the side surface thereof. In the state of being squeezed, it is inserted into the upper end of the vertical pipe 10 of the lower building frame body 1, and the connecting projection 8 is engaged with the connecting hole 9 of the vertical pipe 10. As a result, the connecting pin 2 becomes the vertical pipe 1
It is attached to the upper end of 0 and does not need to be removed even when it is not used.

Next, as shown in FIG. 6, the upper building frame body 1
By inserting the vertical pipe 10 into the pin upper portion 2b of the connecting pin 2, the lower end portion of the vertical pipe 10 comes into contact with the sliding surface 5 that is the tip end inclined surface of the engaging projection 3 during the insertion, thereby engaging. The protrusion 3 receives a load that causes it to retract into the inside of the connecting pin 2 against the biasing force of the leaf spring 4, and the engaging protrusion 3 retracts into the inside of the connecting pin 2 by this retracting biasing force. The lower end of the pipe 10 is allowed to be inserted into the pin upper portion 2b of the connecting pin 2 until it comes into contact with the step 2d, so that as shown in FIG.
The contact hole 6 on the side surface of the vertical pipe 10
Since the engaging projection 3 of the connecting pin 2 faces the engaging projection 3 and the engaging projection 3 is released from the retracting biasing force of the vertical pipe 10,
The engagement protrusion 3 is biased by the leaf spring 4 and protrudes to engage with the engagement hole 6, so that the upper and lower scaffolding frames a and b are connected to each other. That is, the vertical pipe 10 of the upper building frame body 1
By simply inserting the lower end into the connecting pin 2 of the lower building frame body 1, the two are automatically connected. Since the engagement projection 3 is formed by the thick metal integrated body 15 as described above and has a rectangular shape in a front view as shown in FIG. 3, the engagement hole of the vertical pipe 10 with which the engagement projection 3 engages. As shown in FIG. 3, 6 is preferably formed in a similar rectangular shape with some allowance in the upper and lower sides in order to prevent rattling.

As described above, the upper and lower building frame bodies 1 and 1 are engaged with the engaging projections 3 and are prevented from coming off from each other. In the embodiment of the present invention, the coming-off preventing force is connected. What is maintained on the pin 2 side is not the engaging projection 3 but the lever rod 14 which is integral with the engaging projection 3 and bears it. That is, the upper building frame main body 1 receives wind force, vibration, or other external force.
When the force for the vertical pipe 10 to come out of the connecting pin 2 is applied to the engaging protrusion 3, the retaining force for preventing the vertical pipe 10 is transmitted to the connecting pin 2 side supporting the engaging protrusion 3. The retaining force is received by the hole wall 17a of the lever hole 17 of the connecting pin 2 through which the lever rod 14 is inserted. The engaging projection 3 and the lever rod 14 are formed in a metal integrated structure 15 which is a rigid body via a connecting rod portion 13, and the lever rod 14 has a thick central portion 2a of the connecting pin 2 at a lever hole 17 thereof. From the vertical pipe 10 side, the contact area of the lever rod 14 with respect to the connecting pin 2 can be made wider than that of the engaging projection 3 so that the engaging projection 3 is loaded from the vertical pipe 10 side. The lever rod 14 tries to receive the external force by contacting the hole wall 17a of the lever hole 17, and thereby a more stable retaining force can be maintained.
Therefore, as shown in FIG. 7, when the engagement protrusion 3 is engaged with the engagement hole 6 of the vertical pipe 10, the engagement protrusion 3 has a vertical margin with respect to the insertion hole 18 on the side of the connecting pin 2. On the other hand, the lever rod 14 is inserted such that its upper surface 14a is in contact with the hole wall 17a of the lever hole 17.

Although the above-described embodiment of the present invention has the above-mentioned characteristics, the retaining force is directly received by the hole wall of the insertion hole 18 of the connecting pin 2 through which the engaging projection 3 is inserted. Of course, it is also good.

Further, the embodiment of the present invention is characterized in that when the upper side scaffolding building frame a is detached from the lower side scaffolding building frame b, the detaching work can be performed very easily. That is, as shown in FIG. 8, the engaging step portion 16 is formed on the lower surface side of the lever rod 14 as described above, and the lever rod 14 is resisted from the biasing force of the leaf spring 4 by, for example, the tip of an operator. Then, as shown by the arrow, by pushing downward and in the retracting direction, the engaging projection 3 retracts into the connecting pin 2 together with the lever rod 14, and the engaging step portion 16 of the lever rod 14 moves into the connecting pin 16. Two
Even if the lever rod 14 is engaged with the inner peripheral surface 19 of the lever and then the pressing force on the lever rod 14 is released, the lever rod 14 is maintained at the retracted position together with the engaging protrusion 3 by the engaging action of the engaging step portion 16. It will be.

In this way, the upper vertical pipe 10 has its engagement hole 6 released from the engagement of the engagement projection 3, so that the pipe 10 can be pulled out from the connecting pin 2.
After pulling out, the worker uses his toes to
When the lever rod 14 is lightly lifted, the engaging step portion 16 of the lever rod 14 is disengaged from the inner peripheral surface 19 of the connecting pin 2, and the lever rod 14 and the engaging protrusion 3 are brought into the initial protruding state by the biasing force of the leaf spring 4. It will be restored and ready for future use. Thus, the disassembling work of the upper and lower scaffolding frames a and b can be easily performed by one operator.

FIG. 9 shows another embodiment of the present invention, in which a leaf spring 4 having a substantially W-shaped cross section is attached to the back side of the metal integrated structure 15 in the same manner as in the above embodiment. Therefore, according to this embodiment, there is an effect that the engaging projection 3 and the lever rod 14 which are the integrated structure 15 are supported more stably. The structure of the spring 4 is not limited to these embodiments, and for example, a spiral spring may be used as the integrated structure 15.
It may be attached to the back side of.

In order to house the integrated structure 15 inside the connecting pin 2, a unit in which the spring 4 is made to cooperate with the back side of the integrated structure 15 is manufactured in advance, and this unit is connected. It is only necessary to insert the engaging projection 3 and the lever rod 14 which are biased by the spring 4 into the inside of 2 from the opening of the one end thereof and project from the insertion hole 18 and the lever hole 17, respectively, which is extremely easy to manufacture. Is.

[0024]

According to the first aspect of the present invention, the upper and lower scaffolding building frames are automatically inserted only by inserting the lower end portion of the upper scaffolding building frame into the connecting pin of the lower scaffolding building frame. The scaffolding frame can be assembled efficiently with a minimum number of workers because the connection work is extremely simple.

According to claim 2 of the present invention, claim 1
In addition to the effect of the above, when attaching the connecting pin to the upper end of the building frame main body, simply inserting the connecting pin into the building frame main body will automatically connect and fix both, and the connecting work is extremely easy. The manufacturing cost of the frame can be reduced.

If the connecting pin according to claims 1 and 2 is used, it is only necessary to provide the connecting pipe for the connecting pin and the engaging hole for the engaging projection in the vertical pipe of the existing existing frame body. It can be manufactured at a lower cost.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a front view of the relevant part.

FIG. 4 is a vertical sectional front view of the same.

FIG. 5 is a perspective view of the relevant part.

FIG. 6 is a vertical sectional front view showing an operating state of the main part.

FIG. 7 is a vertical sectional front view showing an operating state of the main part.

FIG. 8 is a vertical sectional front view showing an operating state of the main part.

FIG. 9 is a vertical sectional front view showing another embodiment.

[Explanation of symbols]

a, b scaffolding frame 1 Building frame body 2 connecting pins 3 engagement protrusion 4 springs 5 sliding surface 6 engagement holes 7 spring 8 Connection projection 9 connection holes 10 vertical pipes 13 Link 14 lever rod 15 Integrated structure 16 Engagement step 17 Lever hole 18 insertion holes 19 Inner peripheral surface of connecting pin

Claims (2)

[Claims] 1. A connecting pin is projectingly provided on the left and right upper end portions of a building frame main body, and the connecting pin is provided with an engaging projection projecting from a side surface thereof and retractable from the side surface into the connecting pin.
The engaging projection is provided with a spring for biasing the projection to project from the side surface of the connecting pin, and a sliding surface for loading the retraction force inside the connecting pin against the biasing force of the spring. On the other hand, a scaffolding construction frame in which engaging holes for engaging the engaging projections are provided in the same portions of the left and right lower end side surfaces of the building frame main body in the protruding direction of the engaging projections. 2. The connecting pin is located below the installation position of the engaging protrusion, is urged by a spring from a side surface of the connecting pin, and is projected against the urging force of the spring. 2. The scaffolding construction frame according to claim 1, wherein a retractable coupling projection is provided inside, and a coupling hole with which the coupling projection engages is provided on an upper portion of the building frame body.