JP2001040871A - Coupling device for scaffold building frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling device for scaffold building frame capable of restricting a decrease in the strength in the whole of a framework scaffold by decreasing the oscillation of a coupling pin caused by a load acting to the scaffold building frame or fitting gap between the coupling pin and the scaffold building frame. SOLUTION: This coupling device for scaffold building frame is a coupling device for coupling scaffold building frames a, b up and down and also for increasing a height of the scaffold building frame b to be coupled to the upper side, an upper coupling pin 7b to be inserted to a vertical pipe 1 of the upper side scaffold building frame b is formed at the upper end portion, and a lower end portion comprises a coupling rod 7 forming a bottom coupling pin 7a to be inserted to a vertical pipe 1 of the lower side scaffold building frame a, and this coupling rod 7 is provided with a securing portion 10 for securing the end portion of reinforcing braces 8 for reinforcing the coupling rod 7 by erecting and crossing between the scaffold building frames a to d arranged by facing the coupling rod 7 from the front and rear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting tool used to connect scaffolding frames vertically to each other when a framed scaffold is temporarily provided by the scaffolding frames.

[0002]

2. Description of the Related Art A scaffold building frame is composed of a pair of left and right vertical tubes, a horizontal tube connecting both vertical tubes, and a reinforcing rod attached to both the vertical and horizontal tubes. For temporary installation, connecting means for connecting the vertically opposed scaffolding frames is required. As this connection means,
Conventionally, connecting pins in which upper and lower pin portions are inserted into a vertical pipe of an upper scaffolding frame and a vertical pipe of a lower scaffolding frame have been used.

[0003]

By the way, since the above scaffolding frame uses a considerably old standard product,
The height of the scaffolding frame is considerably lower than the height of recent workers whose average height has been increased, so that when the worker wears a helmet and passes through the framework scaffold, the helmet is attached to the scaffolding frame. The problem is that it hits the horizontal tube. If it is attempted to rebuild all tall scaffolding frames to eliminate such inconveniences, the production of such scaffolding would be enormous, and the scaffolding frames currently in use would be wasted. It will be very troublesome for disposal.

Therefore, the present inventor has proposed that each of the scaffolds in the frame scaffold is constructed by using the long connecting pins for connecting the scaffolding frames vertically, which are longer than those used up to now. An attempt was made to increase the height of the frame, but when such a long connecting pin was used, a new problem that the buckling strength of the pillar as a scaffold was reduced due to the increase in the length of the connecting pin. Has occurred. This is because the connection pin swings due to a load acting on the scaffolding frame and a gap required for fitting between the connection pin and the scaffolding frame, and buckling is likely to occur.

According to the present invention, the above-described long connecting pin (connecting rod) is used alone so that the height of each scaffolding frame in the framed scaffold is increased. However, a load acting on the scaffolding frame is used. To provide a connecting device for a scaffolding frame capable of reducing the swing of the connecting pin caused by the fitting gap between the connecting pin and the vertical pipe of the scaffolding frame, and suppressing a decrease in the strength of the entire framework scaffold. And

[0006]

According to a first aspect of the present invention, there is provided a connecting device for a scaffolding frame, comprising: a pair of right and left vertical tubes;
The scaffolding frames a to d, which are composed of a horizontal pipe 2 connecting the first and second reinforcing pipes 3 attached to the vertical and horizontal pipes 1 and 2, are vertically connected, and each of the scaffolding frames b to d connected to the upper side is connected. A connecting tool for increasing the height to a required length, wherein an upper connecting pin 7b is formed at the upper end to be inserted into the vertical pipe 1 of the upper scaffolding frame b, and the lower end of the lower scaffolding frame a is formed at the lower end. It comprises a connecting rod 7 having a lower connecting pin 7a inserted into the pipe 1. The connecting rod 7 is connected between the connecting rod 7 and scaffolding frames a to d arranged to face each other. It is characterized in that a fastening portion for fastening an end of a reinforcing brace 8 for extending the connecting rod 7 and reinforcing the connecting rod 7 is provided.

According to a second aspect of the present invention, in the connecting device for a scaffolding frame according to the first aspect, the fastening portion has a lock claw 10a for inserting a pin hole 9 provided at an end of a reinforcing brace 8. It is characterized by comprising a pin 10.

[0008]

FIG. 1 is a front view showing a state in which scaffolding frames a to d are connected in a plurality of upper and lower stages by a scaffolding frame connecting tool 4 according to the present invention. FIG. Is a side view showing a state in which scaffolding frames a to d are arranged at predetermined intervals in the front-rear direction, and FIG. 3 shows a scaffolding frame connecting device 4 according to the present invention. As shown in FIGS. 1 and 2, each of the scaffolding frames a to d includes a pair of left and right vertical tubes 1, 1 and both vertical tubes 1, 1.
1 and a reinforcing rod 3 attached to the vertical pipe 1 and the horizontal pipe 2.

As shown in FIGS. 3 and 4, the scaffolding frame connecting member 4 has an upper connecting pin 7b formed at the upper end thereof to be inserted into the vertical pipe 1 of the upper scaffolding frame b, and a lower side formed at the lower end. A connecting rod 7 having a lower connecting pin 7a inserted into the vertical tube 1 of the scaffolding frame a is provided at an upper end portion of the connecting rod 7 with the connecting rod 7 and a scaffolding structure disposed to face the front and rear. A pin 10 with a locking claw 10a for fastening by inserting a pin hole 9 at an end of a reinforcing bracing 8 that extends between the frames a to d and reinforces the connecting rod 7 (fastening portion). Are projected at right angles to the longitudinal direction of the connecting rod 7.

Referring to FIGS. 3 and 4, the connecting member 4 for a scaffolding frame will be described in detail. The connecting rod 7 has a tubular body 5 entirely penetrating vertically.
A short pipe member 6 is fitted to the central portion in the length direction and is integrally fixed to the tubular main body 5 by welding, and an upper portion of the tubular main body 5 extending upward from an upper end of the short pipe member 6 has an upper portion. The connecting pin 7b is formed, and the lower part of the tubular body 5 extending downward from the lower end of the short pipe member 6 forms the lower connecting pin 7a.

The short pipe member 6 and the upper and lower connecting pins 7
As shown in FIG. 4, the vertical pipe 1 of the upper scaffolding frame a into which the upper connecting pin 7b is inserted has an outer peripheral step having an upper end on the upper side. 11 and the lower connecting pin 6
The vertical pipe 1 of the lower scaffolding frame “b” into which “b” is to be inserted is positioned by its upper end surface being in contact with the lower outer peripheral step portion 12.

As shown in FIG. 4, each connecting rod 7 has
An engagement protrusion 12 protruding from the side surface of the upper connecting pin 7b and capable of retracting into the inside from the side surface;
And a lever rod 14 formed integrally with and protruding from the lever hole 13 of the connecting rod 7, and
U for urging an integrated structure 15 integrally formed with the lever rod 14 in the engaging projection 12 and the lever rod 14 projecting direction.
A letter-shaped leaf spring 16 is incorporated.

The lower end of the connecting rod 7 is provided with a connecting projection 18 protruding from the side surface of the lower connecting pin 7a, and the upper end of the vertical tube 1 of the lower scaffolding frame b is provided with a connecting projection 18 at the upper end. A connecting hole 19 for engaging is provided, and the connecting projection 18 is
They are connected to each other by a U-shaped leaf spring 20 and are urged by the leaf spring 20 to project from the side surface of the lower connecting pin 7a.

A pin 10 projecting from the upper end of the connecting rod 7
The (fixing portion) has a spring-biased lock claw 10a. To fix one end of the reinforcing brace 8 to the pin 10, a pin hole 9 at the end of the reinforcing brace 8 is used. Figure 3
When the pin is inserted into the pin 10 of the connecting rod 7 from the position shown by the solid line, the lock claw 1 is inserted when the pin hole 9 is inserted.
0a is retracted, and the pin hole 9 is shown by a virtual line in FIG.
When the lock claw 10a enters the root of the pin 10 as shown by the solid line in FIG. The other end of the reinforcing brace 8 is connected to the scaffolding frame connecting member 4 on the side to which one end of the reinforcing brace 8 is fastened by the scaffolding frame connecting member 4 on the side facing the front and rear. The upper scaffolding frame b is fastened to a similar pin 10 with a lock claw 10a provided at the upper end of the vertical pipe 1 (see FIG. 5).

An example of the dimensions of the scaffolding frame connecting member 4 is as shown in FIG. 3, where the total length L of the connecting rod 7 is 350 m.
m, the length n of each of the upper connecting pin 7b and the lower connecting pin 7a formed at the upper and lower ends of the connecting rod 7 is 85m.
m, the length (length of the short tube member 6) m excluding the upper and lower connecting pins 7a and 7b from the total length of the connecting rod 7 is 180 mm. Incidentally, in the conventional connecting pin, the total length is, for example, 200 mm, and the length of each of the upper and lower pin portions is 85 mm.
Since the length between the upper pin portion and the lower pin portion is 30 mm, the height of the scaffolding frame is higher when the connecting rod 7 according to the present invention is used than when the conventional connecting pin is used. About 150m
m higher.

In order to vertically connect the scaffolding frames a to d using the scaffolding frame connecting tool 4 constructed as described above, first, as shown in FIGS. Is inserted into the upper end of the vertical pipe 1 of the lower scaffolding frame a. At this time, when the lower connecting pin 7a is inserted into the upper end of the vertical pipe 1 in a state where the connecting projection 18 protruding from the side surface of the lower connecting pin 7a of the connecting rod 7 is pushed inward against the leaf spring 20, At a position where the lower outer peripheral step portion 12 of the connecting rod 7 is in contact with the upper end surface of the vertical pipe 1, the connecting projection 18 is connected to the connecting hole 1 at the upper end of the vertical pipe 1.
9, whereby the lower connecting pin 7 a of the connecting rod 7 is locked to the vertical pipe 1 of the lower scaffolding frame a, and the scaffolding frame connecting tool 4 is fixed to the lower scaffolding frame a. . When the lower connecting pin 7a is pulled out of the vertical pipe 1, the connecting projection 18 is immersed in the vertical pipe 1 by a finger against the urging force of the leaf spring 20, and the connecting projection 18 and the vertical pipe 1 are connected to each other. May be released.

Next, the upper connecting pin 7 of the connecting rod 7 of the connecting tool 4 for the scaffolding frame fixed to the lower scaffolding frame a as described above.
b, the vertical pipe 1 of the upper scaffolding frame b is inserted. At this time, when the lever rod 14 integrated with the engaging projection 12 is pressed downward and in the retreating direction by the operator's toe during the insertion, the engaging projection 12 retreats into the connecting rod 7. Therefore, the lower end of the vertical tube 1 of the upper scaffolding frame b is allowed to be inserted into the connecting rod 7, so that the lower end of the vertical tube 1 is inserted into the engaging hole 17 at the position where the engaging projection 12 faces. Then, the engaging projection 12 is urged and projected by the leaf spring 16 to engage with the engaging hole 17, and the upper connecting pin 7b of the connecting rod 7 is
, Thereby connecting the upper and lower scaffolding frames a and b to each other. Although the connection of the scaffolding frames a and b has been described above, the scaffolding frames b to d
The mutual connection is performed in the same manner as described above.

In this way, the scaffolding frames ad are connected in a plurality of upper and lower stages by the scaffolding frame connecting tool 4, and the scaffolding frames ad connected in the upper and lower stages are framed in a plurality of sets in the front-rear direction. As shown in FIG. 5, the reinforcing bracing 8 is stretched in an X-shape between the scaffolding frames a to d of the respective steps facing each other in the front and rear directions. In this case, one end of the reinforcing bracing 8 (pin hole 9)
Is fastened to a fastening portion (pin 10) provided on the connecting rod 7 of the scaffolding frame connecting tool 4, and the other end (pin hole) is fastened to one end of the reinforcing bracing 8 A similar fastening portion provided at the upper end portion of the vertical pipe 1 of the scaffolding frames a to d connected by the scaffolding frame connecting device 4 on the side to be connected and the scaffolding frame connecting device 4 on the front and rear sides. (Pin).

After the reinforcing braces 8 are stretched in an X-shape between the scaffolding frames a to d of the respective steps opposing each other as described above, the scaffolding frames a of the respective steps opposing each other in the front and rear directions The scaffold plate 21 is bridged via the hooks 22 between the horizontal pipes 2 and 2 between. In FIGS. 1 and 2, reference numerals 23 and 24 denote single pipes for rooting, which are attached to the vertical pipes 1 of the scaffolding frame a by pipe clamps.

As described above, the upper end of the vertical tube 1 of the lower scaffolding frame a and the lower end of the vertical tube 1 of the upper scaffolding frame b are connected by the scaffolding frame connecting member 5 (another scaffold). Frame c,
d), and the height of the upper scaffolding frame b is
Is increased by the length of the short pipe member 6. In this case, the length of the short pipe member 6 is about 180 mm, and the total length of the connecting rod 7 is 350 m.
m, which is considerably longer than the conventional connecting pin. However, in the use of the connecting tool 4 for a scaffolding frame, the connecting rod 7 of the connecting tool 4 for a scaffolding frame is opposed to the connecting rod 7 in the front-rear direction. Since the connecting rods 7 are reinforced by bridging the reinforcing braces 8 between the scaffolding frames to be arranged, the loads acting on the scaffolding frames b to d and the connecting rods 7 and the scaffolding members are strengthened. The swing of the connecting rod 7 caused by the fitting gap between the frames a to d and the vertical pipe 1 is reduced, whereby the buckling of the connecting rod 7 can be prevented, and the reduction in the strength of the entire frame scaffold can be suppressed. This also ensures that the entire framework scaffold is structurally very stable and safe to use.

A connecting rod 7 of the scaffolding frame connecting tool 4;
A pin 10 with a lock claw 10a as a fastening portion is protrudingly provided on the upper end side of the connecting rod 7 when the reinforcing bracing 8 is bridged between the scaffolding frame arranged opposite to the front and rear. A pin hole 9 provided at one end of the reinforcing brace 8 is inserted into the pin 10, and the other end of the reinforcing brace 8 is inserted through the pin hole 9 at the upper end of the vertical pipe 1 of the scaffolding frame ad. Since it is made to pass through a similar pin with a locking claw provided in the portion, the work of bridging the reinforcing brace 8 can be performed easily and easily, and the end of the reinforcing brace 8 can be stopped. The safety can be ensured without easily coming off the attachment part.

Further, in the above embodiment, the locking means for locking the upper and lower connecting pins 7a and 7b of the connecting tool 4 for a scaffolding frame while inserting the pins 7a and 7b into the vertical pipes 1 of the scaffolding frames a to d will be described. However, this locking means is merely an example, and any other locking means may be used.

[0023]

According to the first aspect of the present invention, a connecting tool for a scaffolding frame has an upper connecting pin formed at an upper end thereof and inserted into a vertical pipe of an upper scaffolding frame, and a lower end of the lower scaffolding frame. It consists of a connecting rod that forms a lower connecting pin inserted into the tube,
A fastening portion for fastening the end of a reinforcing bracing that extends between the connecting rod and a scaffolding frame that is disposed to face the front and rear to reinforce the connecting rod. Since the height of the scaffolding frame in the framework scaffold can be increased, the reinforcing brace is bridged between the connecting rod and the scaffolding frame arranged opposite to each other. By
Reduce the swing of the connecting rod caused by the load acting on the scaffolding frame or the fitting gap between the connecting rod and the vertical pipe of the scaffolding frame,
As a result, buckling of the connecting rod can be prevented, and a decrease in the strength of the entire framework scaffold can be suppressed, whereby the entire framework scaffold becomes structurally extremely stable, and safety in use can be ensured.

According to a second aspect of the present invention, since the fastening portion is formed of a pin with a lock claw for inserting a pin hole provided at an end of the reinforcing brace, the reinforcing brace for the connecting rod is provided. The fastening operation can be performed easily and easily, and the end of the reinforcing braid does not easily come off from the fastening portion, so that safety can be secured.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a scaffolding frame is connected in a plurality of upper and lower stages by a scaffolding frame connecting tool according to the present invention.

FIG. 2 is a side view showing a state where scaffolding frames connected in a plurality of upper and lower stages are arranged at predetermined intervals in the front-rear direction.

FIG. 3 is an enlarged front view showing a scaffolding frame connecting tool.

FIG. 4 is an enlarged front view, partially in section, of the scaffolding frame coupling device in a portion surrounded by an arrow A in FIG. 1;

FIG. 5 is a rear view showing a state in which a reinforcing bracing is spanned over a connecting rod of the connecting device for a scaffolding frame and a vertical pipe of the scaffolding frame.

[Explanation of symbols]

 a, b, c, d Scaffolding frame 1 Vertical tube of scaffolding frame 2 Horizontal tube of scaffolding frame 3 Reinforcement rod 4 Connecting tool for scaffolding frame 7 Connecting rod 7a Lower connecting pin 7b Upper connecting pin 8 Reinforcement bracing 9 Pin hole 10 Pin with locking claw (fastening part) 10a Lock claw

Claims (2)

[Claims] 1. A scaffolding frame composed of a pair of left and right vertical tubes, a horizontal tube connecting the vertical tubes, and a reinforcing rod attached to both the vertical and horizontal tubes, is vertically connected, and each of the scaffold buildings connected upward is connected. A connector for increasing the height of the frame to the required length,
At the upper end, an upper connecting pin is formed to be inserted into the vertical pipe of the upper scaffolding frame, and at the lower end, a lower connecting pin is formed to be inserted into the vertical pipe of the lower scaffolding frame. And a fastening portion for fastening an end of a reinforcing strut for reinforcing the connecting rod by bridging between the connecting rod and a scaffolding frame arranged front and rear. A connector for scaffolding frames. 2. The scaffolding frame connecting device according to claim 1, wherein the fastening portion comprises a pin with a locking claw for inserting a pin hole provided at an end of the reinforcing bracing.