JP3631400B2 - Scaffolding frame connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a connector used to connect scaffold building frames up and down when temporarily constructing a frame scaffold with a scaffold building frame.
[0002]
[Prior art]
The scaffolding frame consists of a pair of left and right vertical pipes, a horizontal pipe that connects both vertical pipes, and a reinforcing rod that is attached across the vertical and horizontal pipes. A connecting means for connecting the scaffolding frames facing vertically is necessary. As this connection means, a connection pin in which upper and lower pin portions are inserted into the vertical pipe of the upper scaffold building frame and the vertical pipe of the lower scaffold building frame has been conventionally used.
[0003]
[Problems to be solved by the invention]
By the way, since the above-mentioned scaffold building frame uses a standard product that is quite old, the height of the scaffold building frame is considerably lower than the height of recent workers whose average height is high, Therefore, when an operator wears a helmet and passes through the framework scaffold, there is a disadvantage that the helmet hits the horizontal pipe of the scaffold building frame. In order to eliminate such inconvenience, if it is going to be rebuilt to a tall scaffolding frame, the production cost will be enormous and the scaffolding frame currently used will be wasted. Disposal is also very troublesome.
[0004]
Therefore, the present inventor uses a long connection pin that is longer than the length of the connection pin that connects the scaffold building frame up and down, thereby increasing the height of each scaffold building frame in the frame scaffold. However, when such a long connecting pin is used, the length of the connecting pin becomes longer, which causes a new problem that the buckling strength of the support pillar as a scaffold is lowered. Yes. This is because the connecting pin swings due to a load acting on the scaffold building frame and a gap necessary for fitting between the connecting pin and the scaffold building frame, and buckling is likely to occur.
[0005]
In the present invention, the long connecting pins (connecting rods) as described above are used alone so that the height of each scaffold building frame in the framework scaffold is increased. An object of the present invention is to provide a scaffold building frame connector that can reduce the swing of the connecting pin caused by the fitting gap between the scaffold building frame and the vertical pipe, and can suppress a decrease in strength of the entire framework scaffold.
[0006]
[Means for Solving the Problems]
The scaffold building frame connector according to the first aspect of the present invention is a reinforcing rod 3 attached over a pair of left and right vertical tubes 1, 1 and a horizontal tube 2 connecting both vertical tubes 1, 1 and both vertical and horizontal tubes 1, 2. Is a connecting tool for vertically increasing the height of each scaffold building frame b to d connected to the upper side, the upper scaffolding on the upper end. forming an upper connecting pin 7b to be inserted into the vertical tube 1 Kenwaku b, it consists connecting rod 7 to form a lower connecting pin 7a to be inserted into the vertical pipe 1 of the lower scaffold Kenwaku a the lower end, the connecting rod 7, which protrudes from the side surface of the upper connecting pin 7 b and can be retracted into the inside from the side surface, and is formed integrally with the engaging protrusion 12 and protrudes from the lever hole 13 of the connecting rod 7. The lever rod 14 is provided, and the engaging projection 12 and the lever rod 14 are integrally formed. A U-shaped leaf spring 16 for urging the integrated structure 15 in the protruding direction of the engaging protrusion 12 and the lever rod 14 is provided, and a connecting protrusion 18 protruding from the side surface of the lower connecting pin 7a is provided. A U-shaped leaf spring 20 for urging the connecting protrusion 18 in the protruding direction is incorporated, and the connecting rod 7 is further provided with a scaffolding frame disposed opposite to the connecting rod 7 in the front-rear direction. A fastening portion is provided to fasten the end of the reinforcing brace 8 that spans between ad and reinforces the connecting rod 7, and the other end of the reinforcing brace 8 is one end thereof. It attaches to the fastening part provided in the upper end part of the vertical pipe 1 of the upper scaffold building frame b connected by the connection tool 4 of the side which opposes the part and the connection tool 4 of the side facing front and back. It is characterized by that.
[0007]
The second aspect of the present invention is the scaffold building frame connector according to the first aspect, wherein the fastening portion is from a pin 10 with a lock claw 10a through which a pin hole 9 provided at an end of the reinforcing brace 8 is inserted. It is characterized by becoming.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view showing a state in which scaffold building frames a to d are connected to a plurality of upper and lower stages by a scaffold building frame connector 4 according to the present invention, and FIG. 2 is a scaffold building frame connected to a plurality of upper and lower stages. FIG. 3 is a side view showing a state in which a to d are arranged at predetermined intervals in the front-rear direction, and FIG. 3 shows a scaffold building frame connector 4 according to the present invention. As shown in FIGS. 1 and 2, each scaffold building frame a to d includes a pair of left and right vertical tubes 1, 1, a horizontal tube 2 connecting both vertical tubes 1, 1, a vertical tube 1 and a horizontal tube 2. It consists of the reinforcement rod 3 attached over.
[0009]
As shown in FIGS. 3 and 4, the scaffold building frame connector 4 is formed with an upper connection pin 7 b inserted into the vertical pipe 1 of the upper scaffold building frame b at the upper end portion, and with the lower scaffold building frame at the lower end portion. It consists of the connecting rod 7 which formed the lower connecting pin 7a inserted in the vertical pipe 1 of a, and the upper end part of this connecting rod 7 is opposite to this connecting rod 7, and the scaffolding building frame a- A pin 10 (fastening portion) with a locking claw 10a for fastening through a pin hole 9 at the end of a reinforcing brace 8 that reinforces the connecting rod 7 spanning between d and the connecting rod 7 is connected. It protrudes perpendicularly to the longitudinal direction of the flange 7.
[0010]
The scaffold building frame connector 4 will be described in detail with reference to FIG. 3 and FIG. 4. The connecting rod 7 has a circular tubular body 5 that vertically penetrates the entire length. The short tube member 6 is fitted to the central portion in the direction, and is integrally fixed to the tubular body 5 by welding, and the upper portion of the tubular body 5 extending upward from the upper end of the short tube member 6 is the upper connecting pin 7b. The lower portion of the tubular body 5 extending downward from the lower end of the short tube member 6 forms a lower connecting pin 7a.
[0011]
And the outer periphery step part 11 and 12 is formed between the said short pipe member 6 and the upper and lower connection pins 7a and 7b, and as shown in FIG. 4, the vertical pipe of the upper scaffold building frame a into which the upper connection pin 7b is inserted. 1 is positioned by abutting the lower end surface thereof on the outer peripheral step portion 11 on the upper side, and the vertical pipe 1 of the lower scaffold building frame b into which the lower connecting pin 6b is inserted is the outer peripheral step portion 12 having the upper end surface on the lower side. It is positioned by abutting on.
[0012]
As shown in FIG. 4, each connecting rod 7 is formed integrally with an engaging protrusion 12 that protrudes from the side surface of the upper connecting pin 7 b and is retractable into the inside from the side surface. And a lever rod 14 projecting from the lever hole 13 of the coupling rod 7, and an integral structure 15 in which the engagement projection 12 and the lever rod 14 are integrally formed is projected from the engagement projection 12 and the lever rod 14. A U-shaped leaf spring 16 for biasing in the direction is incorporated.
[0013]
Further, a connecting projection 18 protruding from the side surface of the lower connecting pin 7a is provided at the lower end portion of the connecting rod 7, and the upper end portion of the vertical pipe 1 of the lower scaffold building frame b is engaged with the connecting projection 18. A connection hole 19 is provided, and the connection protrusions 18 are connected to each other by a U-shaped plate spring 20 and are urged and projected from the side surface of the lower connection pin 7 a by the plate spring 20.
[0014]
A pin 10 (fastening portion) protruding from the upper end portion of the connecting rod 7 has a spring-biased locking claw 10a. When the end portion of the reinforcing brace 8 is fastened to the pin 10, the pin 10 is fixed. When the pin hole 9 at the end of the reinforcing brace 8 is inserted so as to be pushed into the pin 10 of the connecting rod 7 from the position indicated by the solid line in FIG. 3, the lock claw 10a is retracted when the pin hole 9 is inserted, When the hole 9 enters the base of the pin 10 as shown in the phantom line of FIG. 3 and the solid line of FIG. 4, the lock claw 10a protrudes to the lock position as shown by the spring biasing force, and the end of the reinforcing brace 8 Fasten the part. The other end portion of the reinforcing brace 8 is connected by the scaffold building frame connector 4 on the side where the one end portion of the reinforcing brace 8 is fastened to the scaffold building frame connector 4 on the opposite side. Is fixed to a similar pin 10 with a lock claw 10a provided at the upper end of the vertical pipe 1 of the upper scaffold building frame b (see FIG. 5).
[0015]
If an example of the dimension of the said scaffold building frame connector 4 is shown, as shown in FIG. 3, the total length L of the connecting rod 7 is 350 mm, and the upper connecting pin 7b and the lower portion formed at the upper and lower ends of the connecting rod 7 The length n of each of the connecting pins 7a is 85 mm, and the length of the portion excluding the upper and lower connecting pins 7a and 7b from the entire length of the connecting rod 7 (the length of the short tube member 6) m is 180 mm. Incidentally, in the conventional connecting pin, the total length is, for example, 200 mm, the length of each of the upper and lower pin portions is 85 mm, and the length between the upper pin portion and the lower pin portion is 30 mm. If the heel 7 is used, the height of the scaffold building frame can be increased by about 150 mm compared to when using the conventional connecting pin.
[0016]
In order to connect the scaffold building frames a to d up and down using the scaffold building frame connector 4 configured as described above, first, as shown in FIG. 3 and FIG. The pin 7a is inserted into the upper end of the vertical pipe 1 of the lower scaffold building frame a. At this time, when the lower connecting pin 7a is inserted into the upper end portion of the vertical tube 1 in a state where the connecting protrusion 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, The connecting projection 18 engages with the connecting hole 19 in the upper end portion of the vertical tube 1 at the position where the lower outer peripheral step portion 12 of the connecting rod 7 contacts the upper end surface of the vertical tube 1, thereby the lower connection of the connecting rod 7. The pin 7a is locked to the vertical pipe 1 of the lower scaffold building frame a, and the scaffold building frame connector 4 is fixed to the lower scaffold building frame a. When the lower connecting pin 7a is extracted from the vertical tube 1, the connecting projection 18 is immersed in the vertical tube 1 with a finger against the urging force of the leaf spring 20, and the connecting projection 18 and the vertical tube 1 The engagement state may be released.
[0017]
Next, the vertical pipe 1 of the upper scaffold building frame b is inserted into the upper coupling pin 7b of the coupling rod 7 of the scaffold building frame connector 4 fixed to the lower scaffold building frame a as described above. At this time, the engaging projection 12 is retracted into the connecting rod 7 by pressing the lever rod 14 integrated with the engaging projection 12 downward with the operator's foot in the retraction direction during insertion. Therefore, the lower end portion of the vertical pipe 1 of the upper scaffold building frame b is allowed to be inserted into the connecting rod 7, and is inserted until the engagement projection 12 faces the engagement hole 17 at the lower end portion of the vertical pipe 1. Then, the engaging protrusion 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 locked to the vertical pipe 1 of the upper scaffold building frame b, Thus, the upper and lower scaffold building frames a and b are connected to each other. The above description has been made on the mutual connection of the scaffolding frames a and b.
[0018]
In this way, the scaffold building frames a to d are connected to a plurality of upper and lower stages by the scaffold building frame connector 4, and a plurality of scaffold building frames a to d connected to the upper and lower stages are framed in the front-rear direction. As shown in Fig. 2, reinforcing braces 8 are stretched in an X shape between the scaffolding frames a to d at the respective stages facing each other in the front-rear direction. In this case, one end portion (pin hole 9) of the reinforcing brace 8 is fastened to a fastening portion (pin 10) provided in the connecting rod 7 of the scaffold building frame connector 4, and the other end portion (pin). The holes) are scaffold building frames a to d which are connected by the scaffold building frame connector 4 on the side to which one end of the reinforcing brace 8 is fastened and the scaffold building frame connector 4 on the opposite side. It fastens to the same fastening part (pin) provided at the upper end of the vertical pipe 1.
[0019]
As described above, the reinforcing brace 8 is stretched in an X-shape between the scaffolding frames a to d at each step facing the front and back, and then the scaffolding frames a to d at each step facing the front and back. The scaffolding plate 21 is bridged via the hook 22 between the horizontal tubes 2 and 2 therebetween. In FIGS. 1 and 2, reference numerals 23 and 24 denote single pipes for rooting, which are each attached to the vertical pipe 1 of the scaffold building frame a by pipe clamps.
[0020]
As described above, the upper end of the vertical pipe 1 of the lower scaffold building frame a and the lower end of the vertical pipe 1 of the upper scaffold building frame b are connected by the scaffold building frame connector 5 (other scaffold building frames c). , D), the height of the upper scaffold building frame b is increased by the length of the short pipe member 6 of the connecting rod 7. In this case, the length of the short tube member 6 is about 180 mm, and the total length of the connecting rod 7 is about 350 mm, which is considerably longer than the conventional connecting pin. Is to reinforce the connecting rod 7 by bridging the reinforcing brace 8 between the connecting rod 7 of the scaffold building frame connector 4 and the scaffold building frame arranged opposite to the front and rear. Therefore, the load acting on the scaffolding building frames b to d and the swinging of the coupling rod 7 caused by the fitting gap between the coupling rods 7 and the vertical pipes 1 of the scaffolding building frames a to d are reduced. 7 can be prevented, and a decrease in strength of the entire frame scaffold can be suppressed, which also makes the entire frame scaffold structurally extremely stable and secures safety in use.
[0021]
In addition, when the reinforcing brace 8 is bridged between the connecting rod 7 of the scaffold building frame connector 4 and the scaffold building frame arranged facing the front and rear, it is fixed to the upper end side of the connecting rod 7. A pin 10 with a lock claw 10a as a portion is protruded, and 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 the pin Since the hole 9 is inserted into a similar pin with a locking claw provided in the upper end portion of the vertical pipe 1 of the scaffold building frames a to d, the bridging work of the reinforcing brace 8 can be performed easily and easily. In addition, the end of the reinforcing brace 8 is not easily detached from the fastening portion, and safety can be ensured.
[0022]
Moreover, although the above embodiment also demonstrated the locking means which locks in the state which inserted the vertical connection pins 7a and 7b of the scaffold building frame coupling tool 4 into the vertical pipes 1 of the scaffold building frames a to d, respectively. This locking means is only an example, and any other locking means may be used.
[0023]
【The invention's effect】
The connecting device for a scaffold building frame of the invention according to claim 1 has an upper connecting pin inserted into the vertical pipe of the upper scaffold building frame at the upper end portion, and a lower portion inserted into the vertical tube of the lower scaffold building frame at the lower end portion. Reinforcing brace that reinforces the connecting rod by spanning between the connecting rod and a scaffolding frame arranged opposite to the front and rear. Since the fixing part for fixing the end part of the frame is provided, the height of the scaffolding frame in the framed scaffolding can be increased, while the scaffolding frame arranged facing the connecting rod and the front and rear By laying a reinforcing brace between and the frame, the load acting on the scaffolding frame and the swinging of the coupling rod caused by the fitting gap between the coupling rod and the vertical pipe of the scaffolding frame are reduced, thereby While preventing buckling of the connecting rod, it is possible to suppress a decrease in strength of the entire framework scaffold, Or whole framework scaffold by Les structurally becomes that highly stable, it is possible to ensure the safety of the use.
[0024]
As described in claim 2, since the fastening portion is composed of a pin with a lock claw for inserting a pin hole provided at an end of the reinforcing brace, the fastening operation of the reinforcing brace to the connecting rod is performed. Can be easily and easily performed, and the end of the reinforcing brace is not easily detached from the fastening portion, thereby ensuring safety.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a scaffold building frame is connected to a plurality of upper and lower stages by a scaffold building frame connector according to the present invention.
FIG. 2 is a side view showing a state in which scaffold building frames connected to 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 scaffold building frame connector.
4 is an enlarged front view of a part of the scaffold building frame connector in a part surrounded by an arrow A in FIG. 1. FIG.
FIG. 5 is a rear view showing a state in which a reinforcing brace is stretched over the connecting rod of the scaffold building frame connector and the vertical pipe of the scaffold building frame.
[Explanation of symbols]
a, b, c, d Scaffolding frame 1 Scaffolding frame vertical pipe 2 Scaffolding frame horizontal pipe 3 Reinforcement rod 4 Scaffolding frame connector 7 Linkage rod 7a Lower connection pin 7b Upper connection pin 8 Reinforcing brace 9 Pin hole 10 Pin with lock claw (fastening part)
10a Lock claw

Claims (2)

The scaffolding frame consisting of a pair of left and right vertical pipes, a horizontal pipe connecting the vertical pipes and a reinforcing rod attached across the vertical and horizontal pipes is connected up and down, and the height of each scaffold building frame connected to the upper side is It is a connecting tool for increasing the required length, and an upper connecting pin inserted into the vertical pipe of the upper scaffold building frame is formed at the upper end portion, and a lower connecting pin inserted into the vertical pipe of the lower scaffold building frame at the lower end portion. The connecting rod is formed with an engaging protrusion that protrudes from the side surface of the upper connecting pin and is retractable from the side surface, and is formed integrally with the engaging protrusion. A U-shaped leaf spring that is provided with a lever rod projecting from the lever hole and urges an integral structure integrally formed with the engagement projection and the lever rod in the projecting direction of the engagement projection and the lever rod. Built-in projection that protrudes from the side of the lower coupling pin Is provided, U-shaped plate spring that urges the coupling projections on its projecting direction is built, this connecting rod, further and the connecting rod, the scaffold construction are arranged to face the front and rear A fastening portion is provided for fastening the end of the reinforcing brace that spans between the frame and reinforces the connecting rod, and the other end of the reinforcing brace attaches one end thereof. A scaffold building frame connector configured to be fixed to a fixing portion provided at an upper end portion of a vertical pipe of an upper scaffold building frame that is connected to a side connector in front and back. 2. The scaffold building frame connector according to claim 1, wherein the fastening portion is a pin with a lock claw through which a pin hole provided in an end portion of a reinforcing brace is inserted.

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