JPS6235926Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tightening device for tightening bands used when wrapping electrical conduits, lightweight equipment, etc. around the circumferential surface of utility poles.

An underframe is constructed by erecting side plates on both sides of a central piece to which one end of the tightening band is attached, and a circular hole is provided at one end of the side plate of the underframe. A clutch plate is interposed between the side plates, and a rotating winding shaft consisting of a pair of clamping pieces is inserted through a circular hole in the tightening operation frame, a parallel elongated hole provided in the clutch plate, and a circular hole in the underframe. For example, a tightening device for a tightening band in which the other end of the tightening band is attached to a clamping piece and the tightening band is tightened by operating a tightening operation frame is disclosed by Jikosho.
It is publicly known as described in Japanese Patent No. 52-2780.

However, in this known structure, the clutch plate is disposed between the tightening operation and one side plate of the underframe, and feeding pawls are provided on both sides of the clutch plate, which are connected to the engagement plate provided on the side plate. Since the winding operation is performed using the rotary winding shaft after the winding is inserted into and taken out of the hole, the number of feed pawls and engagement holes that can be arranged is limited, and the tightening operation frame cannot be rotated 90 degrees with respect to the underframe. The winding operation can only be carried out at most by the user, and therefore, there is a drawback that delicate tightening of the tightening band cannot be performed.

The present invention was devised with the aim of eliminating such drawbacks, and includes a circular structure provided on one side plate of the underframe and one side plate of the tightening operation frame located on the opposite side to the side plate. By providing a feed pawl on the edge of the hole and providing an engagement edge into which the feed pawl fits and disengages on the edge of the parallel elongated hole in the clutch plate, it is possible to provide a larger number of feed pawls and engagement edges than before. This allows the tightening band to be tightened more reliably.

The tightening device according to the present invention has a rotating take-up shaft A that holds one end of the tightening band and winds it up, and the one end is attached to one end of the underframe C so as to be able to reciprocate by the rotating take-up shaft A. Tightening operation frame B, tightening operation frame B
and a clutch plate D which is sandwiched between the underframe C and the side plates of the tightening operation frame B and the underframe C and is rotated by the reciprocating rotation of the operation frame B. Consists of.

The rotating winding shaft A has a long U-shape, and a tightening band a is placed between a pair of clamping pieces 1, 1' and the clamping pieces 1, 1'.
It is provided with a gap 2 into which one end of the holder is inserted.

The tightening operation frame B has one end connected by a connecting piece 3 to form a pair of parallel side plates 4 and 5, and a rotary winding shaft A is passed through the center of one end of the side plates 4 and 5. A feed pawl 8 is provided with circular holes 6 and 7 that can freely rotate, and a feed pawl 8 that engages and disengages the engagement edge 6 of the clutch plate D into the hole edge of the circular hole 6 of one side plate 4;
8, 8 are provided at equal intervals.

As shown in FIG. 7, the feed pawl 8 is made by bending the edge of the circular hole 6 at right angles toward the inside of the side plate 4, and uses the vertical portion of the front side to prevent the clutch plate D from reversing or to wind it up. An engaging edge 8' for shaft rotation is provided, and a gently arched clutch plate rotation guide edge 8'' is formed at the rear of the engaging edge 8', reaching from the upper end of the engaging edge 8' to the side plate 4 surface. There is.

The underframe C has a long hole 10 in the center piece 9 which is fixed by penetrating one end of the tightening band a and bending it, and a band patch piece 1 bent in a sideways shape on one side.
8, with clamper overturn prevention support parts 19, 19 provided on both sides of the tip, and left and right side plates 11, 12 formed by bending the side edges of the center piece 9 at right angles.
A circular hole 13, 1 for passing the rotary winding shaft A is provided at one end opposite to the band patch piece 18 of 1, 12.
4, and the feed pawls 8, 8, 8, which have the same shape as the tightening operation frame B, are arranged at equal intervals, and the engaging edge 16 of the clutch plate D is fitted into and removed from the hole edge of the circular hole 13 of one side plate 11. It is set facing outward.

The clutch plate D is held between the side plates 4, 12 and 5, 11 of the tightening operation frame B and the underframe C, respectively, and the holding pieces 1, 1' of the rotary winding shaft A are located in the center.
Parallel elongated holes 14, 14 are provided which pass through the parallel elongated holes 14, 14 separately, and the engaging edges 16, 16, 16, on which the feed pawl 8 is fitted and removed, are tightened to the hole edges of the parallel elongated holes 14, 14. The same number of engagement claws 8 provided on the underframe C or a positive number multiple thereof are provided, and a protruding edge 20' is provided at the peripheral end, protruding in the direction in which the feed claws 8 protrude and forming a gap 20.
It is configured by providing.

Thus, the circular holes 13 and 14 of the underframe C and the circular holes 6 and 7 of the tightening operation frame B are aligned and combined,
The clutch plate D is sandwiched between the side plates 4, 12, 5, and 11 of these frames B and C with the bottom side facing the locking claw 8 side, and the rotating winding shaft A is inserted through the washer 15. This embodiment is made by penetrating the operation frame B from the side plate 4 side with the locking claw 8 at the tip to the side plate 5 side without the locking claw, and attaching a washer 15 to the tip protruding from the operation frame side plate 5 and bending it. This provides a tightening device.

Next, the method of using the tightening device for the tightening band of the present invention will be explained with reference to an embodiment. The orientation of the engaging edges 8', 8', 8' and the engaging edges 8' of the engaging claws 8, 8, 8 provided on the edge of the circular hole 6 provided on one side of the side plate 4 of the tightening operation frame B ,8',
8' are aligned in the same direction of rotation, one end of the band a is locked in a long hole 10 provided in the center piece of the underframe C, and the other end of the band a is held between the rotating winding shaft A. After inserting between pieces 1 and 1' and properly tightening band a, by reciprocating the tightening operation frame B, band a is wound around rotating winding shaft A, and band a is strongly tightened. It is.

That is, in the case of this embodiment, when the rotating winding shaft A is rotated rearward (in the opening direction of the operating frame B and the underframe C), the engaging edge 8' of the locking pawl 8 of the tightening operating frame B Since the locking edge 16 of the clutch plate D is engaged, the rotary winding shaft A is inevitably rotated backward, and the belt a is wound around the winding shaft A, while the side plate 1 on the other side of the underframe C is
The clutch plate D corresponding to the locking pawl 8 provided in FIG. 1 also rotates rearward along the clutch plate rotation guide edge on the rear side of the locking pawl 8 and gets over the locking pawl 8. Next, when the tightening operation frame B is turned forward (the closing direction of the operation frame B and the underframe C) and reversed, the engaging claw 8 of the tightening operation frame B that was engaged with the locking edge 16 of the clutch plate D is no longer engaged. Since the rotation direction is the 8″ side of the mating edge,
This time, only the side plate 4 rotates idly without the clutch plate D, so the rotary winding shaft A also does not rotate. On the other hand, the relationship between the clutch plate D on the opposite side and the side plate 11 of the underframe C is that, as mentioned above, since the rotary winding shaft A does not rotate, the clutch plate D also does not rotate, and therefore the tightening operation frame B on this side also does not rotate. Only the side plate 5 freely rotates forward about the rotary winding shaft A inserted through a circular hole 7 provided at one end of the side plate 5. Therefore, by repeatedly moving the tightening operation frame B back and forth, the rotating winding shaft A
is rotated in a certain direction, and the band a inserted between the pair of clamping pieces 1 and 1' of the rotary winding shaft A is wound around the winding shaft A and tightened.

In addition, the illustration 21 shows the side plates 4 and 5 of the tightening operation frame B.
This is a locking piece of the engaging protrusion 22 formed in the figure.

Since the present invention has the above-mentioned structure, the engagement edges of the clutch plate can be arranged in many positions.If the engagement edges of the clutch plate are arranged at six locations as in the embodiment, the rotation of the tightening operation frame toward the tightening side can be performed in 60° increments. This makes it possible to perform delicate tightening, so the maximum binding force can be obtained in any situation, making it practical.

Moreover, since the present invention is provided with a protruding edge protruding in the direction in which the feed pawl protrudes at the peripheral end of the clutch plate, the feed pawl protrudes into the gap formed by this protrusion. The engagement relationship between the feed pawl and the engaging edge is ensured, and there is no fear of incomplete engagement due to wear of the tip of the locking pawl due to repeated movements of the tightening operation frame. It is economical because it can be used any number of times.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an exploded perspective view of the invention, Fig. 2 is a longitudinal side view showing the installed state, Fig. 3 is a front view of the same, and Fig. 4 is a rotating winder. Axis A
FIG. 5 is a front view of the clutch plate, FIG. 6 is a partially cutaway enlarged perspective view of the clutch plate D, underframe C, and tightening operation frame assembly section, and FIG. 7 is a front view of the clutch plate. Front view of operation C, Figure 8 is the same side, Figure 9 is the 8th side.
An enlarged perspective view of part E in the figure is shown. A...Rotating winding shaft, B...Tightening operation frame, C...
...Underframe, D...Clutch plate, a...Band, 1,
1'... Holding piece, 4, 5... Side plate of tightening operation frame, 6, 7... Circular hole, 8... Feed claw, 11, 1
2...Side plate of underframe, 13, 14...Circular hole, 16
...engaged edge.

Claims (1)

[Scope of utility model registration request] An underframe is constructed by erecting side plates on both sides of the central piece on which one end of the tightening band is attached, and a circular hole provided at one end of the side plate of the tightening operation frame is inserted into a circular hole provided at one end of the side plate of the underframe. A clutch plate is interposed between the side plate of the underframe and the side plate of the tightening operation frame arranged outside the side plate, and the rotary winding shaft consisting of a pair of clamping pieces is connected to the circular side of the tightening operation frame. In a tightening band tightener that is assembled by passing through a hole, a parallel elongated hole provided in a clutch plate, and a circular hole in an underframe, and tightening the tightening band to a clamping piece, one side plate of the underframe and the side plate are assembled. A feed pawl is provided on the hole edge of each circular hole provided in one side plate of the tightening frame located on the opposite side, and the engagement edge into which the feed pawl engages and disengages is connected to the hole edge of the parallel elongated hole in the clutch plate. A tightening device for a tightening band, which is provided on a peripheral edge of a clutch plate and has a projecting edge projecting in a direction in which the feed pawl projects.