JPH058732Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a door opening/closing mechanism for a pole-type metal wheel used when re-lining, installing, or expanding cables such as communication lines and telephone lines.

(Conventional technology) Replacement and installation of communication lines such as telephone lines and electric wires,
When expanding the installation, a large number of metal wheels are fixed and suspended at regular intervals from the existing wire above or a newly drawn messenger wire, and a pulling rope is passed through the rollers inside these metal wheels, and after this pulling rope is The cable connected to the end is continued and extended.

Workers used to climb up to utility poles and do the work directly by hand, such as suspending the metal wheel from the messenger wires and pulling ropes and cables in and out of the metal wheel. Because the footing is poor and unstable when climbing to high places, there is a risk of falling.
It is desirable to avoid working at heights such as on pillars as much as possible.

Therefore, in recent years, long poles or hotstacks have been used from the ground to suspend and fix the metal wheel to messenger wires, etc., and to take pulling ropes and cables into and out of the metal wheel.

(Problem to be solved by the invention) However, these metal wheels are of the so-called cantilever type, with a roller for placing the cable on one side of a vertical frame at the bottom, and a clamping part for the messenger wire at the top. The metal wheel is suspended and fixed on the Messenger wire by clamping the Messengier wire with the above-mentioned clamping part, and the pull rope or cable is put in and taken out from one side of this metal wheel and placed on the roller. The wire is extended, but when you pull the rope, the gold wheel swings on the wire,
The pull rope or cable lifts off the roller,
There is a risk of it falling out of the opening.

Therefore, it is best to provide a door that covers this opening, but it is better to have a door that can be easily and reliably opened and closed on a metal wheel suspended from the ground using a long hot stake or pole on a messenger wire. The current situation is that there is no such thing.

(Means for Solving the Problems) Therefore, this invention provides an opening/closing door that can be opened and closed easily and reliably at the end of a long hot stay or pole.

The specific structure of this idea is to provide a roller for placing cables between the lower parts of two vertical frames that are spaced apart from each other, and to provide a clamping part for the messenger wire between the vertical frames above the rollers. In the metal wheel having an opening in one of the vertical frames, a flat shaft with a flat cross section fixed through the lower end of the opening/closing door that covers the opening is rotatably supported on the end of the vertical frame at the lower end of the opening. A latch that can be moved in and out between the side of the opening/closing door and the flat shaft is supported on one side of the vertical frame so as to be able to slide freely along the vertical frame, and a spring that constantly urges the latch upward is provided. When the opening/closing door is open, the flat surface of the flat shaft closes a part of the cross section of the latch sliding space, and the latch is provided with a suitable hook part.

(Function) To open the door of this metal wheel, hook an appropriate object onto the hook of the latch and pull the hook.The latch slides against the force of the bullet against the side of one vertical frame. , it comes off between the side of the opening/closing door and the flat shaft. There, the opening/closing door is unlocked, and when the opening/closing door is rotated, its free end comes off from the end of the vertical frame, and the opening/closing door rotates around the pivot of the flat shaft as one with the flat shaft. opens. As the flat shaft rotates with the rotation of the opening/closing door, the flat surface of the flat shaft closes a part of the cross section of the slide space of the latch, and even if the hook is released, the upper end of the latch hits the flat shaft, and the bullet Even with force, the latch does not rise and the door remains open. At this time, the flat shaft does not rotate and is maintained in this state due to the weight of the opening/closing door. To close the door from this state, lift the door, and when the free end approaches the end of the vertical frame at the top of the opening, the flat surface of the flat shaft that rotates together with the door will be approximately parallel to the vertical frame. As a result, the upper part of the latch moves between the side part of the door and the flat shaft while pushing the door with the bullet, and this force causes the free end of the door to overlap the end of the vertical frame at the top of the opening, causing it to open and close. The door is closed and locked in this state.

(Example) An embodiment of this invention will be described below with reference to the drawings.

1, 1 are two vertical frames installed with an interval between them, one of which is long and the other short,
Each frame has a channel groove shape with an outwardly opened cross section. 2 is a substantially U-shaped lower frame formed by overlapping one side plate of the long vertical frame 1, and 3 is formed between the lower end of the short frame 1 and the upper end of the other side plate of the lower frame 2. 4 is a roller shaft that extends between both sides of the lower frame 2, and one end of this roller shaft 4 passes through the long vertical frame 1, and Vertical frame 1
A nut 5 is screwed onto one end of a roller shaft 4 that protrudes to the outside, and a nut 6 is screwed to the other end of the roller shaft 4 that passes through the other side plate of the lower frame 2 and protrudes from the other side plate. The roller shaft 4 protrudes in the direction. 7 is a roller rotatably provided on the shaft 4 in the lower frame 2; 8 is a circular hole bored in the bearing plates 2a, 2a protruding outward from both side edges of the other side plate of the lower frame 2; 9 is a circular hole in the shaft 4; A semicircular shaft having a semicircular cross section approximately half of the circular hole 8, which is rotatably provided between the two bearing plates 2a, 2a by penetrating both ends of the two circular holes 8. One end of the opening/closing door 3 is fixed to the shaft 9. Reference numeral 10 denotes a locking shaft provided at the lower end of the short vertical frame 1, and a hook portion 3a provided at the free end of the opening/closing door 3 is removably locked to this locking shaft 10. 11
are the two bearing plates 2a of the lower frame 2,
A latch 12 is a long hole provided in the back plate of the latch 11, and one end of the shaft 4 is loosely inserted into the elongated hole 12. A nut 13 is screwed onto the 4 ends of the shaft protruding from the outer surface of the back plate. 14 is a spring spring with one end fixed to the lower end of this latch 11 and the other end fixed to the shaft 4. The latch 11 is lifted upward by the force of this spring spring 14, and the upper part becomes the pivot end of the opening/closing door 3. The semicircular shaft 9, which is inserted between the opening and closing door 3 and the semicircular shaft 9 and is integral with the opening/closing door 3, cannot rotate, and the opening/closing door 3 is locked. At this time, the shaft 4 is located at the lower end of the elongated hole 12 of the latch 11. 15 is latch 11
Hooks 16 and 17 project from the lower end of the back plate of the frame, and 16 and 17 are an upper shaft and a lower shaft that extend horizontally between the upper portions of the vertical frames 1 and 1, respectively, with an interval between the vertical frames 1 and 1.
Reference numeral 18 denotes a receiving metal fitting having a channel-shaped cross section provided at the center of these upper shaft 16 and lower shaft 17, and this receiving metal fitting 18 allows each of the shafts 16 and 17 to pass through holes in both side plates. Reference numerals 19 and 19 denote hanging members having a channel groove type cross section provided on the shafts 16 and 17 between this receiving metal fitting 18 and each vertical frame 1. The upper shaft 16 and the lower shaft 17 are loosely passed through the two holes, so that the shaft 1
It is slidable along lines 6 and 17. 20,2
0 is a clamping body made of rubber or the like provided at the lower end of each of these hanging members 19, and each of these clamping bodies 20
protrude from each hanging member 19 on both sides to face each other. Reference numerals 21 and 21 denote guide fittings that cover the lower surface of each clamping body 20 and are supported by each hanging member 19.These two guide fittings 21 and 21 are both arranged in a substantially "C" shape, and each Guide leg pieces 21a extending to the outside of the vertical frame 1 are protrudingly provided on both sides of the lower end of the guide fitting 21. Reference numerals 22 and 22 denote collars 23 and 2 that are crowned on the upper shaft 16 between each side plate of the receiving metal fitting 18 and each hanging member 19;
Reference numeral 3 denotes a spring spring wound around the outer periphery of the lower shaft 17 between each side plate of the receiving fitting 18 and each hanging member 19. These spring springs 23 always keep each hanging member 19 in the direction of the vertical frame 1. Being pushed. Reference numerals 24 and 24 denote disc-shaped clamps rotatably provided on the lower shaft 17 between each hanging member 19 and each vertical frame 1. It has an arcuate groove 25 into which the upper shaft 16 loosely passes. 2
6 and 26 are protrusions provided at two locations on the inner surface periphery below both ends of the arcuate groove 25 of each clamp 24;
Reference numeral 7 denotes a clamp lever 28 that protrudes from the peripheral edge of the arcuate groove 25 of each clamp 24 at a substantially central position;
is a handle attached to the tip of these two clamp levers 27, 27.

In this embodiment, when the operator holds this metal wheel and pulls the hook 15 downward against the force of the spring spring 14, the latch 11 comes off from the door 3 and the semicircular shaft 9, and the door 3 The opening/closing door 3 can be opened by turning it around the semicircular shaft 9. In that case, if the door 3 of the metal wheel is turned down and tilted slightly diagonally, the door 3 will open under its own weight when the latch 11 is released.
When the opening/closing door 3 is open, the semicircular portion of the semicircular shaft 9 touches the end of the latch 11, and the latch 11 does not move even under the force of the spring spring 14.

Then, using a hot stake (not shown), the handle 28 of the metal wheel is hung from the hook at the end of the hot stay, and the metal wheel is pulled up to the messenger wire (not shown). Then, the messenger wire is inserted into the metal wheel through the opening, the messenger wire is applied to the lower surface of the receiving metal fitting 18 between the two clamping bodies 20, 20, and the metal wheel is placed on the messenger wire. When the handle 28 is pulled down using the hook of the hot stay, each clamp lever 27 rotates around the lower shaft 17 as shown in FIG. 26 is inserted between each vertical frame 1 and each hanging member 19 as shown in FIGS. Although the upper part of each hanging member 19 is not pushed because the clamp 24 is flat, and the collar 22 is interposed between it and the receiving metal fitting 18, the upper part of each hanging member 19 hardly moves. Therefore, the lower part of each hanging member 19 is inclined obliquely close to the center, and the respective clamping bodies 20 are close to each other, and the messenger wire 29 is in contact with the lower surface of the receiving fitting 18.
Hold it so that it is pushed up from both sides slightly below.
At this time, the rotation of the clamp 24 is restricted by the length of the arcuate groove 25, and the clamp lever 27 stops at the position shown in FIG. 5 and cannot rotate any further. Hanging member 19
It is in between. Furthermore, since each clamp 24 has protrusions 26 on both sides, the clamp lever 27 may be tilted to either side as shown by the dashed line in FIG. As a result, this metal wheel is fixed on the messenger wire 29 and suspended.

In this way, a large number of metal wheels are hung and fixed in order at intervals along the length of the messenger wire (not shown), and a pull rope (not shown) is connected from one end of each of the metal wheels. Put it in each gold wheel and place it on each roller 7. Then, the worker lifts the opening/closing door 3 of each of these metal wheels with the tip of a lever holding a hot stake from the ground, and when the hook part 3a of the opening/closing door 3 approaches the locking shaft 10 of the vertical frame 1, the opening/closing door is closed. 3, the semicircular shaft 9 also rotates and the oblique plane of the semicircular shaft 9 becomes approximately parallel to the other side plate of the lower frame 2. When the end of the latch 11 comes off from the semicircular shaft 9, the force of the spring spring 14 is applied. , the latch 11 slides upward, and this force rotates the door 3 , the hook 3 a engages with the locking shaft 10 , and the latch 11 is placed between the door 3 and the semicircular shaft 9 . When the user enters, the door 3 is locked in the closed state. In this state, the pull rope is pulled from one end, and a cable (not shown) connected to the rear end of the pull rope is extended through each metal car.

After the cable has been extended, the cable is removed from each gold wheel, but in order to open the opening/closing door 3,
When a worker from the ground pulls down the hook 15 using a hot stake, the hook 15 is on the side of the metal wheel, as shown in FIG. It rotates clockwise, the hook 15 is positioned directly below and tilts, the latch 11 is removed from the opening/closing door 3 and the semicircular shaft 9, and the opening/closing door 3 rotates with the semicircular shaft 9 due to its own weight and opens. Then, take out the cable etc. from this opening.

Although the semicircular shaft 9 with a semicircular cross section is used in the above embodiment, the shape is not limited to this, and any suitable shape may be used as long as the width of one side is larger than the width of the other side substantially perpendicular to the shaft. Often, when the oblique plane is parallel to the opening/closing door, the latch can slide between them,
In addition, the shaft may act as a latch stopper when the door is open. Further, although the latch 11 is provided with a hook 15, this may also have an appropriate shape, and a hook portion provided with a hook hole in the latch 11 is also widely included as a hook portion.

(Effect of the invention) This invention has the above-mentioned structure. When opening the door, hook an appropriate object onto the hook of the latch and pull it downward. The door will rotate under its own weight and open. When closing the door, lift the door and bring it close to the vertical frame at the upper end of the opening, and it will be automatically closed by a bullet, and this closed state will be locked by a latch. Therefore, when a worker from the ground uses a long hot stake or pole to operate the opening/closing door of a metal wheel suspended from a messenger wire stretched at a high place, the operation is extremely easy, quick and reliable. The door can be opened and closed. Therefore, the metal wheel with the door opening/closing mechanism of this invention is ideal for use in cable extension methods that use long hot stays and poles from the ground.

[Brief explanation of drawings]

The figures show an embodiment of this invention, in which Fig. 1 is a partially sectional front view of a metal wheel having a door opening/closing mechanism of this invention, Fig. 2 is a side view of the same, and Fig. 3 is a line A--A of Fig. 1. A
Fig. 4 is a sectional view taken along the line B-B in Fig. 1, and Fig. 5 shows the state of the clamp when the messenger wire is held in the holding part of the metal wheel having the door opening/closing mechanism of this invention. Figure 6 is a sectional view of the clamping part showing a state in which the messenger wire is clamped by the clamping part of the metal wheel having the door opening/closing mechanism of this invention.
FIG. 7 is a partially sectional front view showing a state in which the metal wheel having the door opening/closing mechanism of this invention is fixed to a messenger wire and suspended, and the opening/closing door is opened. In the figure, 1 is the vertical frame, 2 is the lower frame,
3 is an opening/closing door, 4 is a roller shaft, 7 is a roller,
8 is a circular hole, 9 is a semicircular shaft, 11 is a latch, 1
2 is a long hole, 14 is a spring spring, 15 is a hook, 17 is a lower shaft, 18 is a receiving metal fitting, 19
20 is a clamping member, 24 is a clamp, and 29 is a messenger wire.

Claims (1)

[Scope of utility model registration request] A cable mounting roller is provided between the lower portions of two vertical frames that are spaced apart from each other, a clamping portion for the messenger wire is provided between the vertical frames above the roller, and an opening is provided in one of the vertical frames. In a metal wheel having a section, a flat shaft with a flat cross section fixed through the lower end of the opening/closing door that covers this opening is rotatably supported on the end of the vertical frame at the lower end of the opening. A latch that can be moved in and out between the flat shaft and the latch is supported on one side of the vertical frame so as to be able to slide freely along the vertical frame, and a spring is provided that constantly urges the latch upward, and the door is opened. A door opening/closing mechanism for a rod-type metal wheel, characterized in that the flat surface of the flat shaft closes a part of the cross-section of the sliding space of the latch in a closed state, and the latch is provided with an appropriate hook part.