JPH051466A - Connecting device for temporary single pipe - Google Patents

Abstract

PURPOSE:To assemble single pipes for temporary provision as easily and firmly as possible. CONSTITUTION:In a hollow connecting pin 2 provided with single pipe inserting parts 2b, 2c on both sides of the pin center part 2a, engaging projections 3a, 3b capable of projecting and retreating are provided on both the single pipe inserting parts 2b, 2c. A spring 4 energizing both the engaging projections 3a. 3b in the projecting direction is provided inside the connecting pin 2, and sliding faces 5a, 5b for loading retreating force on the engaging projections 3a, 3b to the interior of the connecting pin 2 against the energizing force of the spring 4 are provided on both the projections 3a, 3b. Meanwhile, on single pipes 1, 1 to be inserted with the above-mentioned both single pipe inserting parts 2b, 2c, engaging holes 6, 6 to be engaged with both the engaging projections 3a, 3b are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single pipe connecting device for assembling a temporary single pipe scaffold.

[0002]

2. Description of the Related Art In order to sequentially assemble temporary single pipe scaffolds at a construction site of a building, naturally, a connecting means for connecting the single pipes to each other is required.

Conventionally, as this connecting means, as shown in, for example, Japanese Utility Model Laid-Open No. 58-83550 in FIG. 11, the single pipe insertion portions 2 on both sides of the central portion 20a of the connecting pin 20 are used.
0b, 20c are provided with substantially L-shaped cutouts 21a, 21b, while a piercing rivet 23 is provided inside the single pipe 22, and after inserting the piercing rivet into the notches of both insertion portions of the connecting pin, There has been proposed a connecting device of a type in which a connecting pin is rotated as shown by an arrow so as to prevent the connecting pin from coming off.

[0004]

In the above prior art, the operation of rotating the connecting pin between the two is necessary separately from the operation of inserting the single pipe into both the inserting portions of the connecting pin. There is a problem that at least two workers are required to perform the work, and the connecting work is 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, in the hollow connecting pin 2 having the single-tube inserting portions 2b and 2c on both sides of the pin central portion 2a, the hollow connecting pin 2 protrudes from both side surfaces of the single-tube inserting portions 2b and 2c. Retractable engaging projections 3a and 3b are provided from the side surface into the connecting pin 2, and the engaging projections 3a and 3b are biased inside the connecting pin 2 in the protruding direction from the side surface of the connecting pin 2. A spring 4 is provided, and both engaging protrusions 3a,
The engaging projections 3a, 3b are provided on the 3b against the biasing force of the spring 4.
b is provided with sliding surfaces 5a, 5b for loading the retraction force into the connecting pin 2, while the single tube inserting portions 2b, 2 are provided.
The engaging projections 3a, 3b on the single pipes 1, 1 inserted into
Is used to provide the engaging holes 6 and 6 which are engaged with each other.

In the second aspect, the pin central portion 2a
With the hollow connecting pin 2 having the single tube insertion portions 2b and 2c on both sides of the single tube insertion portion, the single tube insertion portions 2b and 2c
Is provided with engaging projections 3a, 3b projecting from the side surface and retractable from the side surface into the inside of the connecting pin 2, and inside the connecting pin 2, both engaging projections 3a, 3b are provided. A spring 4 for urging from a side surface in a projecting direction is provided, and a lever rod 7 integrally formed with both the engaging projections 3a, 3b and projecting from a side wall of the central portion 2a is provided at the pin central portion 2a, while both the single pipes are provided. Engagement holes 6, in which the engagement projections 3a, 3b engage with the single pipes 1, 1 inserted into the insertion portions 2b, 2c.
6 is adopted.

In the third aspect of the present invention, the engaging projection 3 is resisted against the biasing force of the spring 4 by the engaging projections 3a and 3b.
The sliding surface 5a, 5b for loading the retraction force into the inside of the connecting pin 2 of a, 3b is provided.

Further, in the fourth aspect, the pin central portion 2a
With the hollow connecting pin 2 having the single tube insertion portions 2b and 2c on both sides of the single tube insertion portion, the single tube insertion portions 2b and 2c
Is provided with engaging projections 3a, 3b projecting from the side surface and retractable from the side surface into the inside of the connecting pin 2, and inside the connecting pin 2, both engaging projections 3a, 3b are provided. A spring 4 is provided to bias the side surface in a protruding direction, and a pair of lever rods 7a, which are integrally formed with the pin central portion 2a separately from the engaging protrusions 3a and 3b, respectively, and protrude from the side wall of the central portion 2a, respectively. 7b is provided, and on the other hand, the single pipes 1 and 1 inserted into both the single pipe insertion portions 2b and 2c are provided with engagement holes 6 and 6 for engaging the engagement protrusions 3a and 3b. is there.

In the fifth aspect, the pin central portion 2a
With the hollow connecting pin 2 having the single tube insertion portions 2b and 2c on both sides of the single tube insertion portion, the single tube insertion portions 2b and 2c
Is provided with engaging projections 3a, 3b projecting from the side surface and retractable from the side surface into the inside of the connecting pin 2, and the engaging projections 3a, 3b are separately provided inside the connecting pin 2 respectively. A pair of springs 4a, 4b for urging the tube inserting portions 2b, 2c from the side surfaces in a projecting direction are provided, and the pin central portion 2a is formed integrally with the engaging protrusions 3a, 3b separately from the central portion 2a. A pair of lever rods 7a and 7b projecting from the side walls are provided, while the engagement projections 3a and 3b engage with the single tubes 1 and 1 inserted into the single tube insertion portions 2b and 2c. 6 is adopted.

According to the sixth aspect of the invention, the engaging projections 3a and 3b are loaded on the engaging projections 3a and 3b against the urging force of the springs 4a and 4b by retreating the engaging projections 3a and 3b into the connecting pin 2. 6. A sliding surface 5a, 5b is provided for the purpose of
The configuration described is adopted.

According to a seventh aspect, the lever rod 7
And the engaging projections 3a, 3b on both sides thereof are the connecting rods 13a, 1
The structure according to any one of claims 1 to 3 is adopted, which comprises an integrated structure 9 integrally formed by 3b in a substantially E-shaped cross section.

Further, in the present invention, each of the engaging projections 3a and 3b and the pair of lever rods 7a and 7b are also included.
Is a pair of integrated structures 9a, which are integrally formed by a pair of connecting rods 8a and 8b, respectively, each having a substantially U-shaped cross section.
9b is adopted.

Further, according to a ninth aspect, the upper surfaces of the lever rods 7, 7a, 7b and. Alternatively, the configuration according to any one of claims 1 to 8 is provided on the lower surface, which is provided with engagement step portions 10a and 10b for engaging the lever rod with the retracted position of the connecting pin 2 in the inward direction. Is.

Further, in the tenth aspect, the engaging projection 3
The hole wall 1 of the lever hole 11 of the connecting pin 2 through which the lever rods 7, 7a, 7b and the lever rod pass the external force applied to a and 3b.
The structure according to any one of claims 1 to 9 is formed so as to be received by 1a.

According to the eleventh aspect of the present invention, a temporary single pipe is used, which is equidistant from both ends and has the engaging holes penetrating through the respective parts having the same phase in the circumferential direction. There is.

[0017]

According to the first, third or sixth aspect of the present invention, one single tube 1 is inserted into one single tube insertion portion 2b of the connecting pin 2 and the other single tube is inserted into the other single tube insertion portion 2c. When inserting 1, the engaging projections 3a, 3b
When the single pipes 1 and 1 come into contact with the sliding surfaces 5a and 5b, the engaging projections 3a and 3b are loaded into the connecting pin 2 against the urging force of the springs 4, 4a and 4b. In response to this withdrawal urging force, the engaging projections 3a and 3b withdraw into the inside of the connecting pin 2 and the ends of the single pipes 1 and 1 are connected to the connecting pin 2.
When the engaging projections 3a and 3b of the connecting pin 2 are inserted into the engaging holes 6 of the single pipes 1 and 1 to the positions facing the engaging projections 3a and 3b of the connecting pins 2, Since the retracting biasing force of the single pipes 1 and 1 is released, the engaging projections 3a and 3b are biased by the springs 4 or 4a and 4b to project and engage with the engaging holes 6, and both single pipes 1 and 1 will be connected to each other via the connecting pin 2. That is, by simply inserting the single pipes 1 and 1 into the single pipe inserting portions 2b and 2c of the connecting pin 2, the single pipes 1 and 1 are automatically connected.

According to the second aspect of the present invention, when inserting one single tube 1 into one single tube insertion portion 2b of the connecting pin 2 and inserting the other single tube 1 into the other single tube insertion portion 2c, During the insertion, the lever rod 7 integrated with the engaging protrusions 3a and 3b is pushed in the retreating direction by the operator's foot or hand so that the engaging protrusions 3a and 3b retract into the connecting pin 2. Therefore, the end of each single pipe 1, 1 is a connecting pin 2.
When it is inserted to the position where the engaging projections 3a, 3b of the connecting pin 2 face the engaging holes 6 of the individual pipes 1, 1, respectively. Engagement protrusion 3
Since the a and 3b are released from the retracting urging force of the single pipes 1 and 1, the engaging protrusions 3a and 3b are urged by the springs 4 or 4a and 4b to project and engage with the engaging holes 6. , Both single tubes 1, 1
Will be connected to each other via the connecting pin 2. That is, the single pipes 1 and 1 are inserted into both the single pipe insertion portions 2b and 2c of the connecting pin 2, and the lever rod 7 is lightly pressed on the way of the insertion, so that the single pipes 1 and 1 are automatically connected. Will be.

Further, according to the present invention, when one single pipe 1 is inserted into one single pipe insertion portion 2b of the connecting pin 2 and the other single pipe 1 is inserted into the other single pipe insertion portion 2c, On the way of the insertion, the lever rods 7a, 7b integrally formed with the engaging protrusions 3a, 3b are pressed in the retracting direction by the operator's toes, whereby the engaging protrusions 3a, 3b are pushed.
Since b independently retreats into the inside of the connecting pin 2 and protrudes from the side surface of the connecting pin 2, the single pipes 1, 1 can be surely connected in order.

In the fifth aspect of the present invention, a pair of springs are provided inside the connecting pin 2 to bias the engaging projections 3a and 3b separately from the side surfaces of the single pipe inserting portions 2b and 2c in the projecting direction. 4a and 4b are provided, so that the reciprocating and projecting operations of the one engaging projection 3a do not affect the other engaging projection 3b, so that the two single pipes 1 and 1 can be connected more reliably. You can

According to the present invention, the lever rods 7 or 7a, 7b and the engaging projections 3a on both sides thereof are provided.
3b is an integral structure 9 or 9a, 9b integrally formed by the connecting rod portions 13a, 13b in a substantially E-shaped cross section or a substantially U-shaped cross section, so that the external force from both single pipes 1, 1 is strengthened. Exerts the action of receiving.

In the ninth aspect, the lever rod 7
Or the upper surfaces of 7a and 7b and. Further, since the lower surface is provided with engaging step portions 10a and 10b for engaging the lever rod with the retracted position of the connecting pin 2 in the inner direction, the lever is used when disassembling each single pipe 1,1. Rod 7 or 7a, 7b
The engaging projections 3a, 3b integral with the can be maintained in a state of retracting into the inside of the connecting pin 2, and the disassembling work of both the single pipes 1, 1 is easy.

In the tenth aspect, the engaging projection 3
The hole wall 1 of the lever hole 11 of the connecting pin 2 through which the lever rods 7, 7a, 7b and the lever rod pass the external force applied to a and 3b.
Since it is formed so that it can be received by 1a,
The external load from 1 can be distributed and received by the engaging projections 3a and 3b and the lever rods 7 or 7a and 7b, and harmful local load can be avoided as much as possible.

Further, in the eleventh aspect of the present invention, engaging holes for engaging the engaging projections 3a, 3b are provided at both ends of the single pipe 1 at the same distance from the both ends and in the same phase in the circumferential direction. Since 6 and 6 are provided so that when the single pipes 1 and 1 are sequentially connected, if the engagement position in the circumferential direction on the one end side of the single pipe 1 is determined, the subsequent circumferential engagement The position will be the same. Single tube 1
Since the engaging positions of the engagement holes 6 and 6 at both ends of the are the same,
The single pipe 1 can be connected from both front and rear ends without any trouble.

[0025]

EXAMPLE FIG. 1 shows a temporary single pipe scaffold assembled by clamping a vertical single pipe 1 and a horizontal single pipe 1 with a well-known clamp metal fitting 12. The order of this assembly is as follows.
First, the horizontal single pipe 1 is clamped to the vertical single pipe 1 on the lower side by the clamp metal fitting 12, and then the single pipe insertion portion 2c on the lower side of the connecting pin 2 is inserted into the vertical single pipe 1 on the lower side. The vertical single pipe 1 on the side, the single pipe insertion portion 2b on the upper side of the connecting pin 2
Then, the vertical single tubes 1 and 1 are connected to each other by inserting into the vertical single tube 1, and the horizontal single tube 1 is clamped to the upper vertical single tube 1 in the same manner. Of course, in the horizontal direction as well, the horizontal single pipes 1 are sequentially connected by the connecting pins 2.

FIG. 2 shows the appearance of the upper and lower single tubes 1, 1 inserted into the connecting pin 2, and FIG. 3 shows the internal structure of the connecting pin 2. The connecting pin 2 is entirely made of a tubular material that penetrates up and down, and the pin central portion 2a is formed to have a wall pressure so that the outer circumference is between the upper single tube inserting portion 2b and the lower single tube inserting portion 2c. Upper and lower single pipes 1 and 1 which are formed with stepped portions 2d and 2e and are inserted into the respective single pipe insertion portions 2b and 2c.
Are positioned by abutting the respective end faces of the outer peripheral stepped portions 2d and 2e, and the engaging projections 3a and 3b of the connecting pin 2 engage with the engaging holes 6 of the single pipes 1 and 1 at that position. The single tubes 1 and 1 are connected via a connecting pin 2.

The engagement projections 3a, 3b are sliding surfaces formed by a flat or slightly rounded inclined surface on the upper surface of one tip and the lower surface of the other tip as shown in FIG. 5a, 5b, both engaging projections 3
A lever rod 7 extending in the same direction as the engaging protrusions 3a, 3b and longer than the engaging protrusions 3a, 3b is integrally formed through the connecting rod portions 8a, 8b at the intermediate portion of the engaging protrusions 3a, 3b. The connecting rod portions 8a and 8b and the lever rod 7 are formed into a thick metal integral structure 9 having a substantially E shape in a side view. As shown in FIG. 3, the metal integrated structure 9 has one engaging projection 3
a is projected from the insertion hole 13a of the upper single tube insertion portion 2b, the other engagement protrusion 3b is projected from the insertion hole 13b of the lower single tube insertion portion 2c, and the lever rod 7 in the middle is projected from the lever hole 11 to form an integrated body. The central portion of the substantially W-shaped leaf spring 4 is fixed to the rear side of the structure 9 by caulking or spot welding, or a small hole provided in the leaf spring 14 is engaged with a protrusion provided on the rear side. And the like, the both ends of the leaf spring 4 are brought into contact with the inner peripheral surface 14 of the connecting pin 2 without being fixed, and thereby the engaging protrusions 3a and 3b constituting the metal integrated structure 9 are formed. The lever rod 7 is a leaf spring 4
The single-tube insertion portions 2b, 2c and the thick pin central portion 2a are respectively biased to project from the side surfaces.

In use, as shown in FIG. 5, first, by inserting the lower single tube inserting portion 2c of the connecting pin 2 into the upper end of the lower single tube 1, the engaging projection 3b of the engaging projection 3b is inserted in the middle of the insertion. The upper end of the single tube 1 comes into contact with the sliding surface 5b, which is the inclined surface of the distal end portion, so that the engaging protrusion 3b resists the biasing force of the leaf spring 4 and causes a load such that the engaging pin 3b withdraws into the inside of the connecting pin 2. The engaging projection 3b is received by this retracting biasing force.
Allows the single pipe 1 to be inserted into the connecting pin 2 until the upper end of the single pipe 1 comes into contact with the outer peripheral step 2e of the single pipe inserting portion 2c of the connecting pin 2 as shown in FIG. Then, the upper end of the single tube 1 is brought into contact with the step portion 2e so that the single tube 1
The engaging projection 3b of the connecting pin 2 faces the engaging hole 6 on the side surface, and the engaging projection 3b is released from the retracting biasing force of the single tube 1, so that the engaging projection 3b is attached to the leaf spring 4. The connecting pin 2 and the lower single pipe 1 are urged and projected to engage with the engaging hole 6.
And are connected. Next, by simply inserting the lower end of the upper single pipe 1 into the upper single pipe inserting portion 2b of the connecting pin 2 in the same manner, the upper and lower single pipes 1 and 1 are automatically connected by the connecting pin 2. Will be done. The engagement protrusions 3a,
3b is formed by the thick metal integral body 9 as described above, and has a rectangular shape in front view as shown in FIG. It is preferable to form the rectangular shape 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, but in the embodiment of the present invention, this retaining force is coupled. It is not the engagement protrusions 3a and 3b that maintain on the pin 2 side,
It is characterized in that the lever rod 7 which is an integral part of this is carried. That is, when a force that the single pipe 1 or 1 tries to come out of the connecting pin 2 is applied to the engagement protrusions 3a, 3b under the influence of wind force, vibration, or other external force, the retaining force for preventing this is the engagement protrusion 3a. , 3b are transmitted to the side of the connecting pin 2 that supports the connecting pins 2 and 3b, and this retaining force is received by the hole wall 11a of the lever hole 11 of the connecting pin 2 through which the lever rod 7 is inserted, as shown in FIG. It is characterized by being. The engaging projections 3a, 3b and the lever rod 7 are connected to each other by a connecting rod portion 8a,
The lever rod 7 is formed of a rigid metal integral structure 9 via 8b.
Since a extends from the lever hole 11 longer than the engaging protrusions 3a and 3b and protrudes, and the contact area of the lever rod 7 with respect to the connecting pin 2 can be made wider than the engaging protrusions 3a and 3b, the single pipe 1 The lever rod 7 tries to receive the external force applied to the engaging projections 3a, 3b from the side by the lever rod 7 abutting against the hole wall 11a of the lever hole 11, thereby maintaining a more stable retaining force. it can.

Although the above-mentioned embodiment of the present invention has the above-mentioned characteristics, the above-mentioned retaining force is applied to the engaging projections 3a, 3
Of course, the holes may be directly received by the hole walls of the insertion holes 13a and 13b of the connecting pin 2 through which b is inserted.

When disassembling the single pipes 1 and 1, as is clear from the above description, the lever rod 7 as shown in FIG. 6 is moved toward the inside of the connecting pin 2 at the tip of the operator, for example. By lightly pressing against the urging force of the leaf spring 4, the engaging projections 3a, 3b integral therewith retract into the connecting pin 2 and disengage from the engaging holes 6, 6 of the single tubes 1, 1. In this state, the connecting pin 2 and both single tubes 1, 1 can be easily disassembled. In order to disassemble the upper single pipe 1 in order, for example, the lower engaging protrusion 3b of the two engaging protrusions 3a and 3b is used.
The projecting length of may be formed longer than the upper side.

FIG. 7 shows another embodiment of the present invention.
In addition to the above-described embodiment, the engaging step portion 10 is provided on the lower surface side of the lever rod 7.
Is provided. According to this embodiment, when disassembling the single pipes 1, 1 from the connecting pin 2, the disassembling work can be performed very easily. That is, if the lever rod 7 is pressed downward and in the retracting direction as shown by the arrow against the biasing force of the leaf spring 4 by the tip of the operator's foot, the engaging projections 3a and 3b together with the lever rod 7 are pushed. The engaging stepped portion 10 of the lever rod 7 is moved in and out of the connecting pin 2.
Engages with the inner peripheral surface 14 of the connecting pin 2, and then the lever rod 7
Even if the pressing force to the lever is released, the lever rod 7 is
With the engaging action of 0, the engaging protrusions 3a and 3b are maintained at the retracted position together with the engaging protrusions 3a and 3b.

In this way, since the engagement holes 6 of the single pipes 1 and 1 are released from the engagement of the engagement protrusions 3a and 3b, the single pipes 1 can be pulled out from the connecting pin 2. After pulling out, the operator lightly kicks up the lever rod 7 with his toes, and the engaging stepped portion 10 of the lever rod 7 is connected to the connecting pin 2.
The lever rod 7 and the engaging projections 3a and 3b are returned to the initial protruding state by the urging force of the leaf spring 4, and are ready for the subsequent use. Thus, the disassembly work of the single pipe can be easily performed by one operator.

FIG. 8 shows still another embodiment of the present invention, in which the lever rods 7a and 7b are separately provided on the engaging projections 3a and 3b, respectively, and the lever rods 7a and 7b are separately provided by connecting rod portions 8a and 8b. In addition, it is formed by forming a thick metal integral structure 9a, 9b having a substantially U shape in a side view. Further, leaf springs 4a and 4b having a substantially U-shaped cross section are linked to the respective integrated structures 9a and 9b in the same manner as in the above-mentioned embodiment. According to this embodiment, at the time of connecting work or disassembling work. Since the respective engagement protrusions 3a or 3b can be projected and retracted without being influenced by each other, the connection can be achieved more reliably. Disassembly work can be performed. In this embodiment, each integrated structure 9
Although springs 4a and 4b are provided on a and 9b, respectively, one spring 4 may be provided on both integrated structures 9a and 9b. Furthermore, the structure of the spring is not limited to that described above, and for example, a spiral spring may be attached to each of the integral structures 9a and 9b.

FIG. 9 shows still another embodiment of the present invention, in which the engagement steps having the same functions as those of the above-mentioned embodiment are provided on the lower surface or the upper surface of each lever rod 7a, 7b of the embodiment shown in FIG. Part 1
0a and 10b are provided. According to this embodiment, when the operator lightly presses the lever rods 7a, 7b downward or upward and in the retreat direction, the engaging protrusions 3a, 3b are maintained in the retracted position. As described above, the work can be carried out smoothly and easily.

In each of the above-described embodiments, in order to house the integrated structures 9, 9a, 9b inside the connecting pin 2 at the manufacturing stage thereof, the above-mentioned structure is previously provided on the back side of the integrated structures 9, 9a, 9b. A unit in which the springs 4, 4a and 4b are linked is manufactured as a unit, and this unit is inserted into the inside of the connecting pin 2 from the opening at one end thereof, and the engagement projection is biased by the springs 4, 4a and 4b. 3a, 3b and lever rods 7, 7a, 7
It is only necessary to project b from the insertion holes 13a and 13b and the lever hole 11, respectively, and the manufacturing thereof is extremely easy.

FIG. 10 shows the structure of the single pipe 1 used in the present invention. The engagement holes 6 and 6 are located at equal distances L and L from both ends thereof, and are the same in the circumferential direction. They are provided on the phase portion θ, that is, on the same straight line O, so that at the beginning of the connecting work of the single pipes 1 and 1, the engaging protrusions 3a and 3b of the connecting pin 2 or the lever rods 7 and 7 are formed.
The engagement holes 6 of the single pipes 1 and 1 are so arranged that the a and 7b project at appropriate projecting positions around the single pipes 1, for example, positions where they do not interfere with the scaffolding plate installed on the single pipes 1 and 1. If the optimal position of the direction is determined, then the circumferential positions of the engaging holes 6 automatically become the same, and the engaging holes 6 and 6 are continuous in a straight line in the longitudinal direction of the single pipes 1 and 1. Therefore, the work on the temporary scaffold after that can be smoothly performed. Further, since the circumferential position of the engagement hole 6 is initially determined when the connecting pin 2 is engaged with the single pipe 1, it is not necessary to perform a troublesome alignment. Since the connection can be made freely from either side, there is an effect that the efficiency of the connection work is extremely good.

[0038]

According to claim 1, 3 or 6 of the present invention, both single pipes are automatically connected by simply inserting each single pipe into both single pipe insertion portions of the connecting pin. Workers can efficiently assemble temporary single pipe scaffolds.

According to the second aspect, when inserting the connecting pin into the single pipe, the worker only presses the lever rod lightly with his toes or hands to connect both single pipes through the connecting pin. In addition to being able to disassemble, the disassembling work is very simple because it can be disassembled, and also from this aspect, it is possible to efficiently assemble and disassemble the temporary single pipe scaffold with a minimum number of workers.

According to the fourth aspect of the present invention, since each engaging projection is provided with a lever rod separately, each engaging projection is independently retracted into the inside of the connecting pin, and at the same time, connected. It can be projected from the side surface of the pin, so that each single pipe can be assembled and disassembled in order and reliably.

Further, according to the fifth aspect of the present invention, since the respective engaging projections are urged to project by respective separate springs, the engaging projections are mutually separated at the time of connecting work or disassembling work. Can be infested without being affected,
The connection and disassembly work can be performed more reliably.

According to the seventh or eighth aspect of the invention, since the engaging projection and the lever rod are formed as an integral structure with the connecting rod portion sandwiched therebetween, a kind of rigid structure is used to prevent external force from both single pipes. Demonstrate the effect of strong reception.

In the ninth aspect, when the worker disassembles the upper and lower single pipes, the engaging projection is retracted into the connecting pin by merely pressing the lever rod with the tip of the foot. Therefore, the operator can easily disassemble both single tubes without losing the posture such as bending over as in the past, and the workability is extremely good. .

According to the tenth aspect of the present invention, the external force applied to the engaging projection is formed to be received by the lever rod and the hole wall of the lever hole of the connecting pin through which the lever rod is inserted. Can be received by the engaging projection and the lever rod in a distributed manner, and harmful local load can be avoided as much as possible, and the lever hole portion of the connecting pin through which the lever rod is inserted can be formed thick. Therefore, it can more strongly receive the external load applied to the single pipe scaffold,
It can be used stably over a long period of time.

Further, according to the eleventh aspect, the protruding portion of the connecting pin from the single pipe can be automatically arranged in the aligned state at a position where it does not hinder the work on the temporary scaffold thereafter. The connection work is extremely easy and can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of an embodiment of the present invention.

FIG. 2 is a front view of the relevant part.

FIG. 3 is a vertical sectional front view of the same.

FIG. 4 is a perspective view of the relevant part.

FIG. 5 is a vertical sectional front view showing an operating state of the main 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 a main part of the other embodiment.

FIG. 8 is a vertical sectional front view showing the other embodiment.

FIG. 9 is a vertical cross-sectional front view showing an operating state of a main part of the other embodiment.

FIG. 10 is a perspective view showing an embodiment of a single tube used in the present invention.

FIG. 11 is an operation explanatory diagram of a conventional technique.

[Explanation of symbols]

1 single tube 2 connecting pins 2a pin center 2b, 2c Single tube insertion part 3a, 3b Engagement protrusion 4,4a, 4b spring 5a, 5b sliding surface 6 engagement holes 7,7a, 7b lever rod 8a, 8b connecting rod 9,9a, 9b integrated structure 10, 10a, 10b engagement step 11 Lever hole 11a hole wall 14 Inner peripheral surface of connecting pin 2

Claims (11)

[Claims] 1. A hollow connecting pin having a single-tube inserting portion on both sides of a pin center portion, the hollow connecting pin projecting from both side surfaces of the single-tube inserting portion and retractable from the side surface into the connecting pin. Engaging protrusions are provided, and springs are provided inside the connecting pins to urge the engaging protrusions in the protruding direction from the side surfaces of the connecting pins, and both engaging protrusions are engaged against the urging force of the springs. Temporary installation in which the mating protrusion is provided with a sliding surface for loading the retraction force into the connecting pin, and on the other hand, the single pipe inserted into both the single pipe insertion portions is provided with the engaging hole for engaging the engaging protrusion. Single pipe connecting device. 2. A hollow connecting pin having a single-tube inserting portion on both sides of a pin center portion, wherein both single-tube inserting portions project from the side surfaces and can retract into the connecting pin from the side surfaces. An engagement protrusion is provided, and a spring for urging the both engagement protrusions in the projecting direction from the side surface of the single pipe insertion portion is provided inside the connecting pin, and the center portion of the pin is integrally formed with the both engagement protrusions. A connecting device for a temporary single pipe, comprising a lever rod projecting from the side wall of the central portion, and an engaging hole for engaging the engaging protrusion with the single pipe inserted into both the single pipe inserting portions. 3. The temporary unit for temporary installation according to claim 2, wherein each of the engagement projections is provided with a sliding surface for applying a repulsive force to the inside of the connecting pin against the engagement projection against the biasing force of the spring. Pipe connecting device. 4. A hollow connecting pin having a single-tube inserting portion on both sides of a pin center portion, the hollow connecting pin projecting from both side surfaces of the single-tube inserting portion and retractable from the side surface into the connecting pin. An engagement protrusion is provided, and a spring for urging the both engagement protrusions in the protruding direction from the side surface of the single pipe insertion portion is provided inside the connecting pin, and the both engagement protrusions are provided at the center of the pin. A pair of lever rods, which are separately formed integrally and protrude from the side wall of the central portion, respectively, and on the other hand, a single pipe inserted into both of the single pipe insertion portions is provided with an engagement hole for engaging the engagement protrusion. Pipe connecting device. 5. A hollow connecting pin having a single-tube inserting portion on both sides of a pin center portion, the hollow connecting pin projecting from both side surfaces of the single-tube inserting portion and retractable from the side surface into the connecting pin. An engaging protrusion is provided, and a pair of springs for separately urging the engaging protrusions in the projecting direction from the side surface of the single pipe inserting portion are provided inside the connecting pin, and the engaging portion is provided at the central portion. A pair of lever rods, which are formed separately from each of the projections and project from the side wall of the central portion, are provided. On the other hand, engagement holes for engaging the engagement projections are provided in the single pipes inserted into the single pipe insertion portions. A single pipe connection device for temporary installation. 6. The temporary installation according to claim 4 or 5, wherein each of the engagement protrusions is provided with a sliding surface for applying a retraction force to the inside of the connecting pin against the engagement protrusion against the biasing force of the spring. Single pipe connecting device. 7. The single pipe for temporary installation according to claim 1, wherein the lever rod and the engaging projections on both sides thereof are an integral structure integrally formed by a connecting rod portion in a substantially E-shaped cross section. Connecting device. 8. The pair of integral protrusions and the pair of lever rods are formed of a pair of integral structures integrally formed by a pair of connecting rods, each having a substantially U-shaped cross section. The temporary single pipe connecting device described. 9. The upper surface of the lever rod and. 9. The connecting device for a temporary single pipe according to claim 1, wherein an engaging step portion for engaging the lever rod with an inward retracting position of the connecting pin is provided on the lower surface. 10. The temporary installation according to claim 1, wherein the external force applied to the engaging projection is formed to be received by the lever rod and the hole wall of the lever hole of the connecting pin through which the lever rod is inserted. Single pipe connecting device. 11. A temporary single pipe, which is equidistant from both ends and has the engaging holes penetrating at portions having the same phase in the circumferential direction.