JP3856491B2 - Pipe lock release mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a release mechanism for a lock pin for a pipe that is suitable for use when, for example, a temporary scaffold, a gantry, a truss frame, or the like is made of a pipe material.
[0002]
[Prior art]
Conventionally, a single pipe or a unitized pipe material is frequently used for a temporary scaffold, a gantry or a truss frame (hereinafter simply referred to as “temporary scaffold or the like”) for performing civil engineering / building work.
To construct a temporary scaffold or the like with such a pipe material, it is common to assemble the pipe material into a predetermined shape using bolts and nuts, but it takes time and effort to screw the nuts into many bolts one by one. In addition, since the nut may be dropped during the operation, a lock pin that can be attached and detached with one touch has been developed in recent years.
[0003]
As shown in FIG. 3, the pipe member 1 is formed with two pairs of pin holes 2 and 3 at positions facing each other across the axis. For example, the lock pin 6 for fixing the plate material 4 to the pipe material 1 has an outer diameter substantially the same as the inner diameter of the pin holes 2 and 3, and a locking member 7 is provided on the side surface thereof. ing. The locking member 7 has a base end portion pivotally supported and a tip end portion which can be protruded and retracted outward from the outer peripheral surface of the lock pin 6, such as a spring that urges the locking member 7 outward. The biasing member 8 is provided.
The locking member 7 has a substantially triangular shape in a sectional view in which a corner portion 9 is formed at a tip portion thereof. When the locking member 7 protrudes, one surface of the corner portion 9 is a lock pin. A stopper surface 7a substantially parallel to a surface orthogonal to the axis 6 and the other surface are an inclined surface 7b in which the distance from the lock pin 6 gradually increases from the tip end side.
[0004]
In such a lock pin 6, for example, the plate member 4 is connected to the pipe member 1 by inserting the lock pin 6 into the hole 5 formed in the plate member 4 and the pin hole 2 of the pipe member 1. . At this time, when the lock pin 6 is inserted into the hole 5 of the plate member 4 and the pin hole 2 of the pipe member 1, the locking member 7 is pushed into the lock pin 6 by the inclined surface 7b. Then, when the lock pin 6 is inserted further into the back, after the locking member 7 passes through the hole 5 of the plate material 4 and the pin hole 2 of the pipe material 1, the biasing member 8 is attached inside the pipe material 1. It is designed to protrude outward by the forces. Then, since the stopper surface 7a of the locking member 7 is substantially orthogonal to the axis of the lock pin 6, the locked state is held against the force in the direction of pulling out the lock pin 6. Yes.
[0005]
Another example of the lock pin is as shown in FIG.
As shown in this figure, the lock pin 10 has an outer diameter substantially the same as the inner diameter of the pin holes 2 and 3, and a locking member 11 is provided on the side surface thereof. The locking member 11 has an axial line in a direction orthogonal to the axial direction of the lock pin 10 and has a tip portion 11a having a spherical shape, and an urging member such as a spring that urges this toward the outside. 13 is provided.
[0006]
In such a lock pin 10, for example, the plate member 4 is connected to the pipe member 1 by inserting the lock pin 10 into the hole 5 formed in the plate member 4 and the pin hole 2 of the pipe member 1. . At this time, when the lock pin 10 is inserted into the hole 5 of the plate member 4 and the pin hole 2 of the pipe member 1, the distal end portion 11 a of the locking member 11 has a spherical shape. Is pushed into the lock pin 10. When the lock pin 10 is further inserted, the locking member 11 passes through the hole 5 of the plate material 4 and the pin hole 2 of the pipe material 1, and then is removed by the urging force of the urging member 13 in the pipe material 1. The lock pin 10 is held against the force in the direction in which the lock pin 10 is pulled out.
[0007]
[Problems to be solved by the invention]
However, the conventional pipe lock pin as described above has the following problems.
First, in the lock pin 6 shown in FIG. 3, the stopper surface 7a is substantially perpendicular to the axis of the lock pin 6 in a state in which the locking member 7 protrudes. The resistance is great against the force. However, when disassembling this, it is practically impossible to push the locking member 7 into the pipe material 1, so it is difficult to pull out the lock pin 6. Is not suitable for use in the pipe material 1 for constituting a temporary scaffold or the like that needs to be disassembled.
[0008]
On the other hand, in the lock pin 10 shown in FIG. 4, the distal end portion 11a of the locking member 11 has a spherical shape, so that it can be pulled out with a small pulling force as compared with the lock pin 6. It is possible to easily perform the dismantling work. However, in other words, this means that the resistance to the force in the direction of pulling out the lock pin 10 is small, and the strength for connecting the plate member 4 and the like to the pipe member 1 is low.
[0009]
The present invention has been made in consideration of the above points, and it is an object of the present invention to provide a pipe lock pin releasing mechanism that exhibits sufficient pulling resistance and that can be easily disassembled. And
[0010]
[Means for Solving the Problems]
The invention according to claim 1 is a lock pin for connecting an object to the pipe material by inserting it into one of a pair of pin holes formed at positions facing each other across the axis of the pipe material. The lock pin is formed of a main body portion and a tip portion on a tip side of the main body portion, an outer diameter of a constant length portion of the tip portion is set smaller than the main body portion, and the tip end The portion is provided with a locking member that can be protruded and retracted to the side, and a biasing member that biases the locking member toward the side, and the locking member includes a stopper surface on the main body side. The stopper surface is substantially perpendicular to the axis of the lock pin when the locking member protrudes from the lock pin, and the inclined surface is Whether the protruding dimension from the lock pin to the side is the tip of the lock pin When the lock pin is pulled out from the pipe material, the inner diameter is substantially the same as the outer diameter of the tip end of the lock pin, and the other end of the pin hole It is characterized in that an insertable puller is configured to be fitted into the tip of the lock pin .
[0011]
The invention according to claim 2 is the pipe lock pin release mechanism according to claim 1, wherein the outer diameter of the extraction tool is substantially the same as or smaller than the main body of the lock pin, and the tip of the extraction tool is at the tip. The lock pin is pushed out by pushing a step formed between the tip and the main body .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a release mechanism for a lock pin for a pipe according to the present invention will be described with reference to FIGS.
[0013]
As shown in FIG. 1, the lock pin (pipe lock pin) 20 has a hollow structure with a circular shape in cross section, and the outer diameter dimension of the constant length portion of the tip end portion 20a is a constant dimension than the main body portion 20b. It is set small. As a result, the lock pin 20 has a stepped shape with different outer diameters at the tip 20a and the main body 20b.
[0014]
A locking member 21 is provided at the distal end portion 20 a of the lock pin 20. The locking member 21 has a base end portion that is rotatably supported by the pin 22, so that the tip end side can protrude and retract from the tip end portion 20 a of the lock pin 20. The distal end portion of the locking member 21 has a substantially triangular shape in cross section, and a corner portion 22 is formed. In the state where the locking member 21 protrudes from the lock pin 20, the surface on one side of the corner 22 is a stopper surface 23 that is substantially orthogonal to the axis of the lock pin 20, and the surface on the other side is the lock pin. The projecting dimension from 20 is an inclined surface 24 that gradually increases from the distal end side of the lock pin 20 toward the corner portion 22.
[0015]
A spring (biasing member) 25 is interposed between the distal end portion of the locking member 21 and the inner peripheral surface of the lock pin 20 in a compressed state, whereby the locking member 21 protrudes from the lock pin 20. It is energized in the direction to do.
[0016]
In order to connect the pipe member 1 and the plate member 4 with such a lock pin 20, the lock pin 20 is inserted into the hole 5 formed in the plate member 4 and the pin hole 2 formed in the pipe member 1. . At this time, when the lock pin 20 is inserted into the hole 5 of the plate member 4, the inclined surface 24 of the locking member 21 hits the inner peripheral surface of the hole 5, thereby pushing the locking member 21 into the lock pin 20. It is like that. And after the corner | angular part 22 passes the pin hole 2 of the pipe material 1, the locking member 21 protrudes outward by the urging | biasing force of the spring 25. As shown in FIG. Then, since the stopper surface 23 of the locking member 21 is substantially orthogonal to the axis of the lock pin 6 thereafter, a large resistance force is exerted against the force in the direction of pulling out the lock pin 21, and the locked state is maintained. It comes to hold.
[0017]
After assembling a temporary scaffold for a predetermined shape by connecting the pipe member 1 and the plate member 4 using the lock pin 20 in this way, the lock pin 20 is pulled out when disassembling it as follows. Do it.
As shown in FIG. 2, a puller 27 is used to pull out the lock pin 20. The extraction tool 27 has, for example, a bottomed cylindrical shape, and has an inner diameter that is substantially the same as the outer diameter of the distal end portion 20a of the lock pin 20, and an outer diameter that is the same as or larger than the outer diameter of the body portion 20b of the lock pin 20. Is set to be smaller.
Such a pulling tool 27 is inserted from the pin hole 3 side of the pipe material 1 and is fitted into the distal end portion 20 a of the lock pin 20. Then, the locking member 21 is pushed into the lock pin 20 by the extraction tool 27, and the lock by the lock pin 20 is released.
Thereafter, when the pulling tool 27 is further pushed in, the tip end portion pushes the step portion 28 of the lock pin 20, and the lock pin 20 can be pushed out from the pin hole 2 of the pipe member 1 and the hole 5 of the plate member 4. Of course, at this time, the lock pin 20 side may be pulled out without further pushing the pulling tool 27.
[0018]
By removing the lock pin 20 in this manner, the connection between the pipe material 1 and the plate material 4 can be released, and the temporary scaffolding or the like can be disassembled.
[0019]
The lock pin 20 described above has a configuration in which the outer diameter of the distal end portion 20a is set smaller than that of the main body portion 20b, and a locking member 21 that can be freely moved into and out of the distal end portion 20a is provided. Thereby, if the lock pin 20 is inserted into the pin hole 2 of the pipe member 1 and the hole 5 of the plate member 4, they can be connected together. At this time, since the stopper surface 23 of the locking member 21 is formed so as to be substantially orthogonal to the axis of the lock pin 20, a sufficient resistance force is exerted against the force in the direction in which the lock pin 20 is pulled out, and it is ensured. The locked state can be maintained.
After the pipe member 1 and the plate member 4 are connected with the lock pin 20 in this way to assemble a scaffold or the like having a predetermined shape, when the lock pin 20 is pulled out to disassemble it, the pin hole 2 of the pipe member 1 If the extraction tool 27 is inserted from the pin hole 3 on the opposite side, the locking member 21 can be pushed into the lock pin 20 to release the lock, and if the lock pin 20 is pulled out in this state, the pipe material 1 And the plate member 4 can be disconnected. Thus, since the lock of the lock pin 20 can be easily released in the pipe material 1, the lock pin 20 is suitably used for the pipe material 1 constituting a temporary scaffold or the like that needs to be disassembled. be able to.
[0020]
At this time, also in the conventional lock pin 6 shown in FIG. 3, if the diameter of the pin hole 3 of the pipe material 1 is increased, a cylindrical puller is inserted here to unlock the locking member 7. Although it is possible, the diameter must be changed between the pin hole 2 and the pin hole 3 of the pipe member 1 in order to obtain such a configuration. As a result, the pin hole 2 is dedicated to the lock pin 6 and the pin hole 3 is dedicated to the pulling tool, so that the direction of the pipe material 1 is limited and the versatility is low.
[0021]
On the other hand, according to the lock pin 20, since the distal end portion 20a has a smaller diameter than the main body portion 20b, the pipe member 1 can be obtained by using the extraction tool 27 whose outer diameter is smaller than that of the main body portion 20b. The pin hole 3 does not need to have a larger diameter than the pin hole 2. Therefore, the pin holes 2 and 3 may have the same diameter, the direction of the pipe material 1 is not limited, and versatility can be enhanced.
[0022]
In addition, since a step portion 28 is formed between the tip portion 20a of the lock pin 20 and the main body portion 20b, the step portion 28 can be pushed by the pulling material 27, whereby the lock pin 20 is It can be pulled out more easily.
[0023]
Moreover, the pulling tool 27 may have a cylindrical shape whose inner diameter is substantially the same as that of the distal end portion 20a of the lock pin 20 and whose outer diameter is the same as or smaller than that of the main body portion 20b of the lock pin 20. Can be manufactured at low cost.
[0024]
In the above embodiment, the lock pin 20 may be integrally attached to the plate member 4. If it does in this way, the board | plate material 4 can be attached to the pipe material 1 by one-touch.
Further, although the plate material 4 is used as an example of the object to be connected to the pipe material 1, it is needless to say that the object is, for example, other pipe material, angle material, H-type, T-type, or L-type steel material. In any case, the same effect as described above can be obtained by using the lock pin 20 configured as described above.
Furthermore, the pipe material 1 is not limited to a circular cross section, and may have a rectangular cross section.
In addition, the extraction tool 27 for locking the locking member 21 of the lock pin 20 has an inner diameter that is substantially the same as that of the distal end portion 20a of the lock pin 20 and an outer diameter that is the same as that of the main body portion 20b of the lock pin 20. It may be in a cylindrical shape with a smaller diameter than this, and the shape, material, etc. of other parts are not limited.
[0025]
【The invention's effect】
As described above, according to the release mechanism of the lock pin for a pipe according to the first aspect, the outer diameter of the constant length portion of the tip portion is set to be smaller than the main body portion by a certain dimension, and at the tip portion, A retractable locking member and a biasing member for biasing the locking member toward the side are provided. Further, the locking member includes a stopper surface that is substantially perpendicular to the axis of the lock pin, and a protruding dimension to the side. There possess an inclined surface that gradually expand, when pulling the locking pin from the pipe, and a configuration in which fitted the pulling tool to the tip portion of the lock pin. Thereby, if a lock pin is inserted in a pipe material and a target object, these can be connected integrally. In addition, when pulling out the lock pin, if the pipe-shaped extraction tool is inserted from the pin hole on the side facing the pin hole of the pipe into which the lock pin is inserted and inserted into the tip of the lock pin, the locking member is locked. It can be pushed into the pin and unlocked. Thereby, in this state, the lock pin can be pulled out from the pipe material, and the connection between the pipe material and the object can be removed. In this way, the lock pin can be easily unlocked in the pipe material and pulled out, so such a lock pin can be used for temporary scaffolding, gantry or truss frame that needs to be disassembled. It can use suitably for the connection of the pipe material to comprise.
Of course, in the locked state, a large resistance can be exerted against the force in the direction of pulling out the lock pin by the locking member protruding in the pipe material, and the connection between the pipe material and the object is ensured. can do.
According to the release mechanism of the lock pin for a pipe according to claim 2, the outer diameter of the extraction tool for pulling out the lock pin is the same as or smaller than the main body of the lock pin. There is no need to bother expanding the pin holes formed in the material. Further, since a step portion is formed between the tip portion of the lock pin and the main body portion, the lock pin can be pushed out by pushing the step portion with the pipe material.
[Brief description of the drawings]
FIG. 1 is an elevational sectional view showing an example of a lock pin for a pipe according to the present invention.
FIG. 2 is an elevational sectional view showing a state in which the lock by the locking member of the lock pin is released.
FIG. 3 is an elevational sectional view showing an example of a conventional pipe lock pin.
FIG. 4 is an elevational sectional view showing another example of a conventional lock pin for a pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe material 2, 3 Pin hole 20 Lock pin 20a Tip part 20b Main-body part 21 Locking member 23 Stopper surface 24 Inclined surface 25 Spring (biasing member)

Claims (2)

A lock pin for connecting an object to the pipe material by inserting it into one of a pair of two pin holes formed at opposite positions across the axis of the pipe material, the lock pin being a main body And an outer diameter of the constant length portion of the tip portion is set to be smaller than the main body portion, and the tip portion protrudes laterally. A free locking member, and a biasing member that biases the locking member toward the side,
The locking member is configured to have a stopper surface on the main body side and an inclined surface on the tip side, and when the locking member protrudes from the lock pin, the stopper surface is locked. The axis is substantially orthogonal to the axis of the pin, and the inclined surface is configured such that the protruding dimension from the lock pin to the side gradually increases from the front end side of the lock pin toward the main body side,
When the lock pin is pulled out from the pipe material, an extraction tool that has an inner diameter substantially equal to the outer diameter of the tip end of the lock pin and can be inserted into the other pin hole is provided at the tip end of the lock pin. A mechanism for releasing a lock pin for a pipe, which is configured to be fitted . The pipe lock pin releasing mechanism according to claim 1, wherein an outer diameter of the extraction tool is set to be substantially the same diameter or a small diameter as a main body portion of the lock pin, and a distal end of the extraction tool is formed between the front end portion and the main body portion. A mechanism for releasing a lock pin for a pipe, wherein the lock pin is pushed out by pushing a step portion formed therebetween .

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