JPH06326947A - Structure for connecting supporting pipe - Google Patents

Abstract

PURPOSE:To rapidly advance connection work and to prevent the generation of disengagement even when external force is applied by providing this supporting pipe connecting structure with a stepped pin which can not be pulled out when an inner through hole is disengaged from an outer through hole and a bolt for restricting the pin to a disengaging range. CONSTITUTION:In the case of connecting an inner supporting pipe 2 to an outer supporting pipe 3, the pipe 2 is inserted from the lower side of the pipe 3 into the inner periphery of the pipe 3 and a required inner through hole 21 is engaged with an outer through hole 31. In the above state, the stepped pin 6 is inserted into the holes 31, 21. Thereby the inner periphery of the hole 21 is abutted on the small diameter part 61 of the pin 6 and locked. In this state, the holes 31, 21 are mutually disengaged and the pin 6 can not be pulled out. On this stage, a screw hole 22 is arranged in the vicinity of the center of an outer through hole 32 and the bolt 7 can be screwed into the screw hole 22. In the above status, the head part 71 of the bolt 7 is abutted on the inner periphery of the hole 32 and the upward movement of the pipe 2 is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support pipe connection structure suitable for use in a hanging portion of a TV hanger.

[0002]

2. Description of the Related Art For example, as a suspension means for supporting a TV hanger on a ceiling, an outer support pipe fixed to a building structure existing in a ceiling portion and having a lower end portion hung down to a lower surface side of a ceiling plate, There is known one including an inner support pipe for suspending and supporting a hanger frame of a television hanger on which a television receiver is mounted. That is, in this structure, the inner support pipe is telescopically fitted into the inner periphery of the outer support pipe, and the inner support pipe and the outer support pipe are tightly coupled to each other by bolts at a required insertion position.

[0003]

However, in the case of only this, while supporting the weight of the entire TV hanger, the screw holes provided in the inner support pipe and the bolt insertion holes provided in the outer support pipe are aligned with each other, and It is indispensable to screw the bolt inserted into the bolt insertion hole into the screw hole while maintaining the state. However, the operation of screwing a bolt into a screw hole that is difficult to see and moves up and down delicately is unexpectedly difficult, and it is a painful and difficult task in conjunction with the work of supporting the weight of the TV hanger.

As a measure for solving such a problem, a through hole is provided in each of the outer support pipe and the inner support pipe, a bolt is passed through the through hole, and a nut is screwed to the through end of the bolt. It is also conceivable to connect both support pipes together. However, in such things, the part where the nut is fixed at the tip of the bolt is exposed to the outside,
There is no choice but to show an unfinished appearance and some concealment means is required.

In any of the conventional cases, the axial load acting on the support pipe due to the weight of the TV hanger and the TV receiver acts on the outer circumference of the bolt. Therefore, there is also a problem that the thread of the bolt is easily crushed.

An object of the present invention is to eliminate such a problem.

[0007]

The present invention takes the following means in order to achieve such an object. That is, the support pipe connection structure according to the present invention is for connecting an inner support pipe and an outer support pipe which are combined in a telescope shape and receive a load in the axial direction, and are provided in the inner support pipe. The inner through hole, the outer through hole formed in the outer support pipe corresponding to the inner through hole, and the inner through hole and the outer through hole which are matched with each other are inserted into the inner through hole and the outer through hole. It is equipped with a stepped pin that cannot be pulled out because the holes are inconsistent with each other, and a bolt that is screwed to the inner support pipe and limits the sliding of the inner support pipe with respect to the outer support pipe by the head to the extent that the stepped pin does not come off It is characterized by

[0008]

With such a structure, the outer support pipe or the inner support pipe is urged against the load so that the outer through hole and the inner through hole are aligned with each other, and at that moment, the through hole is formed. If the stepped pin is inserted in the step and then the urging force is removed, the outer through hole and the inner through hole are misaligned by the load, and the stepped pin cannot be pulled out. Then, when a bolt is screwed on the inner support pipe, the head of the bolt limits the sliding of the inner support pipe with respect to the outer support pipe, and the outer through hole and the inner through hole cannot match each other. Therefore, in this state, even if an external force is applied, the stepped pin cannot fall out, and the outer support pipe and the inner support pipe are reliably connected. In the state where the outer support pipe and the inner support pipe are connected in this way, the axial load acting on the outer support pipe and the inner support pipe acts on the outer circumference of the stepped pin, and the stepped pin Are communicated with each other through.

In this case, however, the provisional connection between the outer support pipe and the inner support pipe is completed only by inserting the stepped pin into the through hole, so that the support pipe is released. In this state, the bolt can be screwed into the screw hole and tightened. Therefore, it is possible to proceed with connection work much quicker and more safely than in the case where the inner support pipe or the outer support pipe is lifted to a certain height and supported while screwing or tightening the bolt into the screw hole. it can. Moreover,
Once connected, the head of the bolt limits relative sliding between the inner support pipe and the outer support pipe, making it impossible to pull out the stepped pin, so maintain safety even in the event of an earthquake. You can

Since the axial load acting on the outer support pipe and the inner support pipe acts on the outer circumference of the stepped pin having no thread groove, the thread groove is crushed by the load. Absent. Since the bolt for preventing sliding also locks the outer support pipe with the head, the thread groove is not deformed. In addition, since the bolt does not receive the load entirely, it may be a relatively small bolt, and for example, a bolt or the like can be easily attached.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the hanger frame 11 of the TV hanger 1 is attached to the inner support pipe 2 and the outer support pipe 3.
And is supported by the building structure 4 existing on the ceiling part.

The TV hanger 1 is a hanger frame 1
1 and an under guard 12 suspended and supported by the hanger frame 11 to mount and support the image receiver T on the bottom plate 12a.
And the upper guard 1 attached to the under guard 12 to limit the upward movement and the forward movement of the receiver T by the top plate portion 13a.
3 and 3.

The inner support pipe 2 has a circular pipe shape with its lower end attached to the center of the hanger frame 11, and has a plurality of inner through holes 21 formed at a predetermined pitch. Also,
The screw holes 22 are provided at portions above the inner through holes 21 by a predetermined distance L, respectively.

The outer support pipe 3 has a mounting flange 3 at the upper end.
3 is a circular pipe shape having a mounting flange 3
3 is fixed to a base 41 fixedly provided on the lower surface of the building structure 4 by using bolts 34. The lower end portion of the outer support pipe 3 penetrates the ceiling plate 5 and hangs down into the room.
The second outer through holes 31 and 32 are formed vertically with a predetermined space.

Then, the inner support pipe 2 is telescopically fitted to the inner circumference of the outer support pipe 3 and is connected to the outer support pipe 3 using stepped pins 6 and bolts 7.
More specifically, the stepped pin 6 is a shaft-shaped member having a large diameter portion 62 formed at both ends of a small diameter portion 61, and the outer diameter of the large diameter portion 62 is the first outer diameter of the outer support pipe 3. It is set to a value that can be inserted into the through hole 31, and the axial length of the small diameter portion 61 is made to substantially correspond to the outer diameter of the inner support pipe 2. The inner through hole 21 of the inner support pipe 2 corresponding to the first outer through hole 31
Has a diameter slightly larger than that of the outer through hole 31. The second outer through hole 32 has a larger diameter than the head portion 71 of the bolt 7, and the axial distance M between the outer through hole 32 and the first outer through hole 31 is equal to the inner through hole 21. Is set smaller than the distance L between the shaft and the screw hole 22. That is, in a state in which the axes of the first outer through hole 31 and the inner through hole 21 are aligned with each other, the screw hole 22 is located in the second outer through hole 32.
It is set to be located near the upper edge of the.

In order to connect the inner support pipe 2 to the outer support pipe 3, first, as shown in FIGS. 2 and 3, the inner support pipe 2 is urged upward and the inner support pipe 2 is lowered to the inner periphery of the outer support pipe 3. Inserted from the side, the desired inner through hole 21 is aligned with the first outer through hole 31, as shown in FIGS. 4 and 5. In that state,
As shown in FIGS. 6 and 7, the stepped pin 6 is inserted into the outer through hole 31 and the inner through hole 21, and thereafter, the upward bias of the inner support pipe 2 is released. As a result, as shown in FIGS. 8 and 9, the inner support pipe 2 is slightly lowered by gravity, and the inner periphery of the inner through hole 21 is brought into contact with and locked by the small diameter portion 61 of the stepped pin 6. In this state, the outer through hole 31
The inner through hole 21 and the inner through hole 21 disagree with each other, making it impossible to extract the stepped pin 6. That is, the inner support pipe 2 is temporarily held by the inner support pipe 2. Screw hole 2 at this stage
2 is located near the center of the second outer through hole 32, and the bolt 7 can be screwed into the screw hole 22. Then, when the bolt 7 is screwed into the screw hole 22, the head 71 of the bolt 7 is located in the second outer through hole 32 as shown in FIGS. 10 and 11. Therefore, even when an upward external force is applied to the inner support pipe 2, the head portion 71 abuts on the inner circumference of the second through hole 32 and the upward movement of the inner support pipe 2 is blocked. The inner support pipe 2 cannot slide to a position where the stepped pin 6 can be attached / detached.

When the height position of the TV hanger 1 is changed, the stepped pin 6 is once pulled out from the inner through hole 21 and the first outer through hole 31 by reversing the procedure described above.
By moving the inner support pipe 2 up and down, a new inner through hole 21 is formed first.
The outer support hole 3 may be aligned with the outer through hole 31, and then the above connecting operation may be performed again to connect the inner support pipe 2 to the outer support pipe 3.

With such a structure, the provisional connection between the outer support pipe 3 and the inner support pipe 2 is completed only by inserting the stepped pin 6 into the through holes 21 and 31, so that the support pipe is completed. With the hands released from a few points, screw the bolt 7 into the screw hole 2
It can be screwed into 2 and tightened. Therefore, the connection work can be carried out much more quickly and safely as compared with the case where the bolt hanger is screwed into the screw hole or tightened while the TV hanger and the inner support pipe are lifted to a certain height and supported. . Moreover, once connected, the head 71 of the bolt 7 causes the outer support pipe 3 of the inner support pipe 2 to move.
Since the upward movement is restricted and the stepped pin 6 cannot be pulled out, safety can be maintained even if an earthquake or the like occurs.

The outer support pipe 3 and the inner support pipe 2
Since the axial load acting on and acts on the outer circumference of the stepped pin 6 having no thread groove, the thread groove will not be crushed by the load. Since the bolt 7 for preventing slide also locks the outer support pipe 3 with the head 71, the thread groove thereof is not deformed. Moreover,
Since the bolt 7 does not receive the load entirely, it may be a relatively small one and can be easily attached by a driver (not shown). Therefore, it is possible to perform the work directly below the ceiling much more easily than when tightening a large bolt or nut on which a load is applied using a wrench or the like.

In the above embodiments, the connection between the inner support pipe and the outer support pipe for suspending the television hanger has been described, but the present invention is not necessarily limited to this and the shaft is not limited thereto. It can be applied to the connection of various support pipes that receive a load in the axial direction. In particular,
Examples thereof include a support pipe for suspending a speaker and a lighting device.

Further, the shape of the stepped pin is not limited to the above-described one, of course. For example, when the outer support pipe is relatively thick, as shown in FIG. The stepped end face 63 existing at the boundary between the diameter portion 62 and the small diameter portion 61 may be provided with a slight inclination to facilitate the guide to the regular position.

[0023]

EFFECTS OF THE INVENTION The present invention, having the above-mentioned structure, provides a support pipe connecting structure capable of promptly and safely advancing the connecting work and not being detached in the connected state even if an external force is applied. It is possible. Also,
According to the present invention, since the load in the axial direction acts not on the bolt having the thread groove but on the pin having no thread groove, there is no problem that the thread groove is crushed by the load. Therefore, it can be suitably used in a place where the connection state needs to be released many times for height adjustment.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the embodiment.

FIG. 3 is a cross-sectional view showing the main parts of the embodiment.

FIG. 4 is a perspective view showing the main part.

FIG. 5 is a cross-sectional view showing the main part.

FIG. 6 is a perspective view showing the main part.

FIG. 7 is a cross-sectional view showing the main part.

FIG. 8 is a perspective view showing the main part.

FIG. 9 is a cross-sectional view showing the main part.

FIG. 10 is a perspective view showing the main part.

FIG. 11 is a sectional view showing the main part.

FIG. 12 is a side view showing a main part of another embodiment.

[Explanation of symbols]

 2 ... Inner support pipe 21 ... Inner through hole 3 ... Outer support pipe 31 ... Outer through hole 6 ... Stepped pin 7 ... Bolt 71 ... Bolt head

Claims (1)

[Claims] 1. A connection structure for connecting an inner support pipe and an outer support pipe, which are combined in a telescope shape and receive a load in the axial direction, and an inner through hole formed in the inner support pipe. By inserting the outer through hole formed in the outer supporting pipe in correspondence with the inner through hole and the mutually matched inner through hole and outer through hole, the inner through hole and the outer through hole are misaligned with each other. A stepped pin that cannot be pulled out, and a bolt that is screwed to the inner support pipe and that limits the sliding of the inner support pipe with respect to the outer support pipe at the head within a range in which the stepped pin does not come off. Support pipe connection structure.