JPH0749053Y2 - Folding connection pipe extension state holding structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding a stretched state of a foldable connecting pipe that can be used as a scaffold or a ladder at a construction site, including a pipe that is a framework of an assembled tent.

[0002]

2. Description of the Related Art As an extended state holding structure for a foldable connecting pipe used as a frame structure of an assembled tent, for example, one disclosed in Japanese Utility Model Laid-Open No. 59-128226 is known.

According to this technique, one end of the first pipe and the other end of the second pipe are pivotally supported by a rotary shaft, and a saddle-shaped cover having a U-shaped cross section is provided on the front end of the first pipe. The portion that is fixed and protrudes from the tip end surface of the first cover is used as the wrapping portion of the second pipe, and the end surfaces of both pipes are butted against each other from the folding positions where the first and second pipes are adjacent to the side portions. And the other end on the tip side of the second pipe is allowed to rotate within a range of about 180 degrees up to the extended position supported by the holding portion of the saddle-shaped cover, and the tip side of the second pipe and the saddle. A pin hole is formed in the holding portion of the shaped cover, and a cylinder is provided inside the tip end side of the second pipe in the radial direction of the second pipe, and the engagement pin, the coil spring and the stopper are fixed in the cylinder. Fit the metal fittings and insert the tip of the engaging pin that engages and disengages with the pin hole of the saddle-shaped cover into the coil spring. And a guide recess of the engaging pin is formed on the inner surface of the holding portion of the saddle-shaped cover along the path of the engaging pin. The tip of the engaging pin of the second pipe is
By fitting into the pin hole of the saddle-shaped cover, the connecting portions of the first and second pipes in the stretched state are prevented from being inadvertently bent, and the tent does not collapse and fall.

[0004]

[Problems to be solved by the invention] With such a configuration,
There are the following problems.

Since the tubular body is inserted into the second pipe while compressing the engagement pins protruding from both ends of the tubular body and the stoppers, the assembling property is poor, and there is a possibility that parts may fly and be lost during assembly. .

Positioning of the tip of the engaging pin and the pin hole of the second pipe is difficult to see, and the tubular body is prone to fall inside the second pipe, resulting in poor assembly.

Since the number of parts is large, assembly and processing are troublesome.

Therefore, the present invention aims to solve the above-mentioned problems by providing an extended state holding structure on the outside of both pipes.

[0009]

In order to achieve the above-mentioned object, the present invention rotatably supports one side portions of the first pipe and the second pipe on the tip end side by a rotary shaft, A saddle-shaped cover is fixed to the front end side of the first pipe, and the protruding portion having a U-shaped cross section protruding from the front end surface of the first pipe is used as a holding portion of the second pipe. From the folding position adjacent to each other to the extended position in which the front end surfaces of both pipes are butted against each other and the front end side of the second pipe is supported by the holding portion of the saddle-shaped cover. In the possible foldable connection pipe, a support shaft for a locking tool is provided on one end side of the second pipe, and the support shaft engages and disengages with the tip of the holding portion of the saddle-shaped cover. The tool is rotatably supported, and the locking tool is provided with a rotation connecting portion projecting from the support shaft in a direction opposite to the second pipe. Fixing a first end of the spring member to the connecting portion for the pivoting, and characterized in that the other end of the spring member attached to the distal end side of the second pipe.

[0010]

The locking device provided on the second pipe engages with both ends of the saddle-shaped cover in the extended state by abutting the two pipes so that the two pipes do not bend in the folding direction. The extended state is maintained. When the spring member is recessed toward the second pipe from this extended holding state, the locking tool rotates in the folding direction of the second pipe around the support shaft as a fulcrum, and the locking tool engages with the saddle-shaped cover. When the pipes are disengaged, both pipes can be folded about the pivot.

Further, when both pipes are rotated in the extending direction from the folded state, the locking tool comes into contact with the tip end surface of the holding portion, and the locking tool is once pushed back in the folding direction of the second pipe. When both pipes are rotated to the extended position, the locking tool engages with the tip of the wrapping portion, and the extended state of both pipes is maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on.

The first pipe 1 and the second pipe 2 have a tip end side 1
One side part of a and 2a is pivotally supported by the rotating shaft 4 of the saddle-shaped cover 3, and both pipes 1 and 2 abut the tip surfaces 1b and 2b from the folded position adjacent to the side part. It is a foldable connecting pipe that rotates within the extension position.

The saddle-shaped cover 3 includes the first and second pipes 1 and 1.
2 has a curved portion 3a having the same curvature as the outer peripheral surface, and a pair of opposing pieces 3b, 3b projecting in parallel from the curved portion 3a with the distal end side 1a of the first pipe 1 interposed therebetween. The first pipe 1 is fixed to the front end side 1a of the first pipe 1 by welding or the like, and a length of at least half of the first pipe 1 projected from the front end surface 1b is extended when the two pipes 1 and 2 are extended. , Second
The other end of the front end 2a of the pipe 2 serves as a holding portion 3c which supports the other end of the pipe 2 over a substantially half circumference.

The facing pieces 3b, 3b of the saddle-shaped cover 3 have central portions projecting toward one side of the first pipe on the side opposite to the curved portion 3a, and between the central portions of the facing pieces 3b, 3b. The above-mentioned rotating shaft 4 is installed on the above, and a bracket 5 is attached to the rotating shaft 4. The front end side 2a of the second pipe 2 is fixed to the bracket 5, and the second pipe 2 is attached to the rotating shaft 4
It is rotatably provided around the second pipe 2, and when the second pipe 2 is rotated to the extended position, the other side substantially half circumference of the tip side 2a is supported by the wrapping portion 3c of the saddle-shaped cover 3. It has become.

The tip of the bracket 5 is located at substantially the same position as the tip 3d of the holding portion 3c of the saddle-shaped cover 3, and the support shaft 6 provided parallel to the rotating shaft 4 at this tip has a saddle-shaped cover. The locking tool 7 having a U-shaped cross section, which is slightly larger than the third locking tool 3,
It surrounds the tip side of and is rotatably supported.

The locking tool 7 has a U-shaped rotation connecting portion 7a.
Is projected on the side opposite to the second pipe 2, and
One end of the spring member 8 is fixed to a so as to sandwich both surfaces, and the other end 8b of the spring member 8 is attached to the rotating shaft 4 in a wrapped manner. The spring member 8 is provided so that the spring plate 8 remains in a free state in which the elastic force does not act and the rotation connecting portion 7 of the locking member 7 is retained.
The lock 7 is held by the spring member 8 in a direction orthogonal to the front end side 2a of the second pipe 2 by being hung from the bracket 5 and the rotation shaft 4a. ,
Further, by pushing the central portion of the spring member 8 in the direction of the second pipe 2, the locking tool 7 rotates about the support shaft 6 in the same direction as the folding of the second pipe 2. .

The present embodiment is configured as described above, and is orthogonal to the tip side 2a of the second pipe 2 in the extended state where the tip surfaces 1b and 2b of the first and second pipes 1 and 2 are butted. The locking tool 7 surrounds the tip 3d of the wrapping portion 3c of the saddle-shaped cover 3, engages with the outer peripheral surface of the tip 3d, and together with the wrapping portion 3c of the saddle-shaped cover 3, both pipes 1, 2. Holds the extended state of.

Next, when the spring member 8 is dented toward the second pipe side from the extended holding state as shown by the imaginary line in FIG. 2, the locking tool 7 folds the second pipe 2 around the support shaft 6 as a fulcrum. Direction (clockwise direction indicated by imaginary line in FIG. 2), the locking tool 7 comes out from the outer periphery of the tip 3d of the holding portion 3c, and both pipes
2 becomes a state in which it can be folded around the pivot 4 as a fulcrum (FIG. 5).

When the first and second pipes 1 and 2 are rotated in the extending direction from the folded state, the saddle-shaped cover 3
The tip 3d of the holding portion 3c of the lock 7 is wider than this.
Since the spring 7 is deformed, the locking tool 7 is once pushed back in the folding direction of the second pipe 2. Then, when both the pipes 1 and 2 rotate to the extended position and the other side of the tip side 2a of the second pipe 2 comes into contact with the wrapping portion 3c of the saddle-shaped cover 3, the locking tool 7 Due to the restoring force of the spring material 8, the spring 8 returns to a position orthogonal to the tip side 2a of the second pipe 2, and the locking tool 7 wraps around the outer periphery of the tip 3d of the holding portion 3c and engages with each other. The extended state of 2 is retained.

FIGS. 6 and 7 show a second embodiment of the present invention, in which the holding portion 3c of the saddle-shaped cover 3 has a pair of slit grooves 3e, 3e on both sides of the tip 3d. The locking tool 7 is formed parallel to the axes of the second pipes 1 and 2, and the locking member 7 is divided on both sides of the second pipe 2, and the tips thereof are folded inward to form engaging pieces 7b and 7b.

The engaging pieces 7b, 7b of the locking tool 7 engage with the above-mentioned slot grooves 3e, 3e in the extended state of the first and second pipes 1, 2, and the spring member 8 is provided with the second. By denting toward the pipe side, the pipes 1 and 2 come out of the slot grooves 3e, 3e, and both pipes 1 and 2 are ready to be folded with the pivot shaft 4 as a fulcrum.

Although the other end of the spring member is attached to the rotating shaft in both of the above-described embodiments, the present invention dents the spring member toward the second pipe side so that the locking member is saddle-shaped. It suffices to rotate the spring member in a direction away from the engagement with the tip of the holding portion, and the other end of the spring material may be directly attached to the tip side of the support shaft of the second pipe. Further, a wire material having elasticity such as a piano wire may be used as the spring material.

[0024]

The effect of the present invention is that the entire extended state holding structure is
Since they are provided outside of both pipes, there are the following differences in effect compared to the conventional one incorporated in the pipes.

1) Since the assembly can be done while visually checking, the workability is excellent, the parts do not fall, and the alignment can be easily performed.

2) Since it is not necessary to apply a compressive force to the spring material at the time of assembly, there is no risk of loss and no extra effort is put on the operator.

3) The number of parts is small, and the assemblability and workability are excellent.

[Brief description of drawings]

FIG. 1 is a perspective view of a foldable connection pipe with an extension state holding structure according to a first embodiment of the present invention.

FIG. 2 is a front view showing a stretched state of a first pipe and a second pipe.

FIG. 3 is a bottom view of FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view showing an intermediate state between extension and folding of the first pipe and the second pipe.

FIG. 6 is a front view of a foldable connection pipe with an extended state holding structure according to a second embodiment of the present invention.

7 is a sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st pipe 1a ... 1st pipe front end side 1b ... 1st pipe front end surface 2 ... 2nd pipe 2a ... 2nd pipe front end side 2b ... 2nd pipe front end surface 3 ... Saddle-shaped cover 3a ... Saddle Curved portion 3b of shaped cover 3 ... Opposing piece 3c of saddle shaped cover 3 ... Holding portion 3d that projects from the tip surface 1b of the first pipe 1 and supports the other side portion of the tip side 2a of the second pipe 2 Tip 3e of holding part 3c ... Slot groove formed in tip 3d of saddle-shaped cover 3 ... Rotating shaft for rotatably supporting first pipe 1 and second pipe 2 ... For second pipe Bracket 6 that connects the tip side 2a and the rotating shaft 4 ... Support shaft of the locking device 7 ... Locking device 7a that holds the first pipe 1 and the second pipe 2 in an extended state. Rotational connecting portion 7b protruding to the opposite side of the pipe 2 ... Engaging piece of the locking tool 7 ... Spring material 8a ... Rotating connection of the locking tool 7 Spring material 8 fixed to the connecting portion 7a
One end 8b of the spring member 8 attached to the rotary shaft 4

Claims (1)

[Scope of utility model registration request] 1. A first pipe having a saddle-shaped cover fixed to the tip end side of the first pipe by pivotally supporting one side portions of the first pipe and the second pipe on the tip side of the first pipe. The protruding portion having a U-shaped cross section protruding from the tip end surface of the second pipe is used as the holding portion of the second pipe,
The first and second pipes are arranged such that the end faces of the two pipes are butted against each other from the folded positions adjacent to each other on the side.
In the foldable connection pipe in which the other end on the tip side of the pipe is rotatable within an extension position supported by the holding portion of the saddle-shaped cover, one end on the tip side of the second pipe is provided. A support shaft for a locking tool is provided, and a locking tool that engages with and disengages from the tip of the saddle-shaped cover is rotatably supported on the support shaft. A turning connecting part projecting in a direction opposite to the pipe is provided, one end of a spring member is fixed to the turning connecting part, and the other end of the spring member is attached to the tip side of the second pipe. Foldable connection pipe extension state holding structure.