JP2530101B2 - Scaffolding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding device used when working on a utility pole or the like.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a conventional scaffolding device 80. The scaffolding device 80 comprises a holding and fixing device 8
1, a tread plate portion 82, and a tension leg portion 83. 90
Is a suspension chain for suspending and holding the lower end portion of the projecting leg portion 83. The holding and fixing device 81 has a forked base portion 84 having a holding chain 85 connected at one end and a hook portion 86 provided at the other end. A bracket member 87, into which a tightening bolt 88 is inserted, is connected to the tip of the holding chain 85. A head 88a for preventing rotation is provided at one end of the tightening bolt 88,
A lock nut member 89 is screwed on the other end side of the bracket member 87.

In order to attach the scaffolding device 80 to the utility pole 100, it is necessary to hold the scaffolding device 81 while holding the projecting end of the base portion 84 and the lower end of the projecting leg portion 83 of the embracing fixing device 81 against the side surface of the utility pole 100. The chain 85 is wound around the electric pole 100, and the head 88a of the tightening bolt 88 is
Is clamped in the hook portion 86 of the base portion 84, and the lock nut member 89 is tightened.

[0004]

The holding chain 85 is
The scaffolding device often twists when it is wound around the telephone pole 100. However, if the screw is tightened while it is twisted, the lock nut member 89 may not be sufficiently tightened due to the entanglement between the chain links and the like. 80 rattling or dropping off is dangerous. Therefore, while fixing the twist of the holding chain 85, the lock nut 89
It was extremely troublesome to carry out the tightening work of No. 3, and even a person skilled in this kind of work needed a long time. It should be noted that it was preferable to use a tool in order to obtain the certainty of tightening, but in this case, the worker is in an unstable posture relying only on the foot bolt 101 of the electric pole 100. However, the work was made more difficult and difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a scaffolding device which can be easily and surely attached to a utility pole or the like.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a holding and fixing device that is attachable to and detachable from a utility pole, a step plate portion projecting from the holding and fixing device, and a lower portion of the step plate portion that is pivotally attached and swings up and down within a predetermined angle. In a scaffolding device composed of freely stretchable leg portions, the holding and fixing device includes a base portion having a contact portion with respect to a utility pole, and a belt holding portion and a hook engaging member provided on the base portion. The belt holding portion, a winding belt, a winding operation tool that holds the winding belt so that the winding belt can be wound or unwound by one pitch, and an unwinding end of the winding belt. A hook lever provided on the side, and the hook tool engaging portion has a horizontally swingable swing lever having an engaging portion for engaging with the hook tool on a protruding end side, and the swing lever is wound. It has a tightening bolt that forcibly swings in the direction of increasing the tension of the rotating belt. It is set to.

[0007]

The present invention uses a winding belt which is hard to twist and can be easily wound around a utility pole. The winding belt is unwound from the winding operation section to some extent, and then the base section is hit. Put the contact part in contact with the utility pole, wind the winding belt around the utility pole, engage the hook on the unwinding end side with the engaging part of the swing lever, and then operate the winding operation tool. To do so. Each time the winding operation tool is operated once, the winding belt is wound up by one pitch to several pitches, and eventually the winding belt is firmly fastened to the utility pole. If the winding amount of one pitch of the winding operation tool is too large than the adjustment amount required for the final tightening on the utility pole and the winding operation tool cannot be operated, retighten it. By tightening the bolt, the rocking lever is rocked by a necessary amount to increase the tension of the winding belt (that is, the tightening of the electric pole).

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a scaffolding device according to the present invention, 2 is a holding and fixing device, 3 is a tread plate portion, 4 is a strut leg portion, and the basic configuration thereof is substantially the same as the conventional one. It is the same.

The holding and fixing device 2 has a base portion 10 having two abutting portions 19 which can abut along the side surface of the electric pole 100 at the end portion on the side opposite to the step board portion 3, and the base portion 10. Part 1
Belt holding portion 11 provided on the right side of 0 (the upper side in FIG. 1)
And a hook tool engaging portion 15 provided on the left side (lower side) of the base portion 10. The belt holding portion 11
Is a belt-shaped winding belt 12 made of cloth, a winding operation tool 13 for holding the winding belt 12, and a winding belt 12
And a hook tool 14 (see FIG. 9) provided on the unwinding end side of the. As shown in FIGS. 3 and 4, the winding operation tool 13
Is a base frame 23 that is horizontally swingably attached by a pivot 22 to a hinge piece 21 fixed to the base portion 10.
An operation frame 25 attached to the swinging end side of the base frame 23 so as to be openable and closable by a winding shaft 24, and an outer surface of the base frame 23 and an inner surface of the operation frame 25 at both ends of the winding shaft 24. And a ratchet wheel 26 that is provided so as to be sandwiched therebetween. The ratchet wheel 26 is fixed to the winding shaft 24 in a non-rotatable state (that is, so as to rotate integrally with the winding shaft 24). The base frame 23 and the operation frame 25 are respectively provided with slide pieces 27 and 29 that are pressed and biased so as to mesh with the tooth tips of the ratchet wheel 26, and can be retracted when tracing in the direction opposite to the tooth tips. ing.

27a and 29a are slide pieces 27 and 29, respectively.
Is a slide guide groove. Reference numeral 28 denotes a spring for pressing and urging the slide piece 29 of the operation frame 25. Although not shown, the slide piece 27 of the base frame 23 also has a spring for pressing urging. The winding belt 12
Is wound around the winding shaft 24, and is wound around the winding shaft 24 when the ratchet wheel 26 rotates counterclockwise in FIG.

Therefore, when the operation frame 25 is opened to the half open state from the state where the operation frame 25 is closed with respect to the base frame 23 (the state shown by the solid line in FIG. 3), the ratchet wheel 26 is pushed by the slide piece 29. 1 pitch to several pitches (note that 1 pitch means the base frame 23
It means that the ratchet wheel 26 is rotated by the amount corresponding to the passage of one tooth tip with respect to the slide piece 27 of 1.) and the winding belt 12 is wound by a corresponding amount. Further, when closing the operation frame 25 so as to return it to the original state, the slide piece 27 of the base frame 23 blocks the reverse rotation of the ratchet wheel 26 and realizes the returning movement of only the operation frame 25. The non-rotatable state is maintained, and then the operation frame 25 again.
The winding belt 12 is wound again by the operation of opening the half-opened state. By repeating the swing of the operation frame 25 in this manner, the winding belt 12 can be wound up by a desired amount.

On the other hand, when the operation frame 25 is opened with respect to the base frame 23 by a predetermined angle or more, the slide piece 29 of the operation frame 25 causes the cam 31 provided on the peripheral portion of the winding shaft 24 in the base frame 23. As you start riding on the operation frame 2
The cam 30 provided around the winding shaft 24 in FIG.
The slide piece 27 of the base frame 23 can be pushed away. Therefore, in this state, the winding belt 12 can be unwound from the winding operation tool 13.

As shown in FIGS. 1, 5 and 6, the hook tool engaging portion 15 includes a swing lever 16 and a tightening bolt 17.
It consists of and. The swing lever 16 is on the left side (left side in FIG. 5).
An engaging portion 35 having a hole shape that penetrates vertically is formed at the projecting end portion of, and the right side portion of the engaging portion 35 is formed so as to be vertically bifurcated. The front and back surfaces of the base portion 10 are sandwiched by the bifurcated portions and are held by a pivot 36 so as to be horizontally swingable. The engaging portion 3
5 is for engaging the above-mentioned hook tool 14. The right end (right side in FIG. 5) of the swing lever 16 projects into the central opening 40 formed in the base portion 10, and at this portion, the bolt receiving piece 37 facing the step board portion 3 side.
Is attached.

Reference numeral 38 is a pivot for allowing the bolt receiving piece 37 to swing freely, and 39 is a collar for holding the bifurcated space of the swing lever 16. On the other hand, the base portion 10 is provided with a bolt base 41 so as to cross the central opening 40, and the tightening bolt 17 described above has its bolt end attached to the bolt receiving piece 37 with respect to the bolt base 41. It is screwed to face. Therefore, when the additional tightening bolt 17 is tightened, the bolt receiving piece 37 is pressed by the bolt end, and the swing lever 16 can be swung so that the engaging portion 25 tilts toward the step board portion 3 side. it can.

As shown in FIGS. 2 and 6, a suspension receiver 44 is attached to the upper portion of the bolt base 41, and a suspension belt 45 is connected to the suspension receiver 44. 48
Is a buckle for adjusting the length. Therefore, this scaffolding device 1
In the case of lifting the electric pole 100 to a predetermined height, a rope member (not shown) is hooked on a foot bolt 101 (see FIG. 9) higher than the electric pole 100 so that the hanging belt 45 is tied to the hung end. The scaffolding device 1 can be easily lifted by pulling the other end of the rope member.

The projecting leg portion 4 is provided so as to be vertically swingable via a lower hinge portion 5 of the step board portion 3, and a projecting piece 6 (see FIG. 7) provided at the lower end portion thereof is It is suspended by a suspending belt 47 that is suspended from a suspending tool 46 attached to the lower portion of the bolt base 41. In addition, a holder tool 50 (see FIG. 8) is provided on the lower surface of the step board portion 3.
The scaffolding device 1 is attached to the scaffolding device 1 so that when the scaffolding device 1 is not used, the projecting leg portion 4 can be fitted into the holder tool 50 so as not to swing, which is convenient for carrying the scaffolding device 1 or the like. There is.

In this scaffolding device 1, each part is made of aluminum or the like in order to reduce the overall weight, and in order to secure the safety from electric shock, the holding and fixing device 2 and the struts are secured. Necessary portions or the whole of the leg portions 3 and the like are covered with zinc plating, rubber lining or the like. To attach the scaffolding device 1 thus configured to the utility pole 100,
In the unwinding operation tool 13, the operation belt 25 is opened to a predetermined angle or more, and the winding belt 12 is unwound to some extent, and the contact portion 19 of the base portion 10 and the protruding piece 6 of the protruding leg portion 4 are removed. The winding belt 12 is wound around the electric pole 100 while being abutted against the side surface of the electric pole 100, and the hook tool 14 is engaged with the engaging portion 35 of the swing lever 16. These operations are simple and safe when the hanging belt 45 is hooked on the upper foot bolt 101 (see FIG. 9). Next, the unwinding operation tool 13 is swung several times as described above (until it cannot be swung) to wind the winding belt 12 by a predetermined amount, so that a strong tightening force for the electric pole 100 is obtained. To do. if,
In this state, if the winding belt 12 is still loose, the tightening bolt 17 is tightened to incline the swing lever 16 toward the tread plate portion 3 to increase the tension of the winding belt 12.

[0018]

The present invention has the above-mentioned structure and uses the winding belt which is hard to twist and can be easily wound around a utility pole or the like. Therefore, the scaffolding device is attached to the utility pole or the like. Work can be done easily and quickly, and it can be firmly attached. Moreover, since the winding belt is used, the winding operation tool having a simple structure and a light weight can be used, and the cost can be reduced, the weight can be reduced, and the mounting work can be further facilitated. . In addition, the winding belt can be wound by this winding operation tool 1
Fine adjustments less than the pitch can be supplemented by adjustment with tightening bolts, so the winding belt can always be wound with a strong tightening force according to the type of utility pole or various diameters that differ in the height direction. .

[Brief description of drawings]

FIG. 1 is a plan view (same as the enlarged view taken along the line AA of FIG. 2) showing a main part of a scaffolding device according to the present invention.

FIG. 2 is a side view showing a usage state of the scaffolding device according to the present invention.

FIG. 3 is an enlarged plan view of a winding operation tool.

FIG. 4 is a view taken in the direction of arrows BB in FIG. 3;

5 is an enlarged cross-sectional view taken along line CC of FIG.

FIG. 6 is an enlarged cross-sectional view taken along line DD of FIG.

FIG. 7 is an enlarged cross-sectional view taken along line EE of FIG.

FIG. 8 is an enlarged sectional view taken along line FF of FIG.

FIG. 9 is a perspective view showing a conventional scaffolding device.

FIG. 10 is an enlarged side view showing the hook device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scaffolding device 2 Holding / holding device 3 Footboard part 4 Stretching leg part 10 Base part 11 Belt holding part 12 Winding belt 13 Winding operation tool 14 Hook tool 15 Hook tool engaging part 16 Swing lever 17 Additional tightening bolt 19 Contact part 35 Engagement part

Claims (1)

(57) [Claims] 1. A holding and fixing device that can be attached to and detached from a utility pole, a step plate portion projecting from the holding and fixing device, and a foot plate portion that is pivotally attached to a lower portion of the step plate portion and is vertically swingable within a predetermined angle. In the scaffolding device including the stretched leg portion, the holding and fixing device includes a base portion having a contact portion with a utility pole, and a belt holding portion and a hook tool engaging portion provided on the base portion. The belt holding unit includes a winding belt, a winding operation tool that holds the winding belt so that the winding belt can be wound or unwound by one pitch, and the unwinding end side of the winding belt. And a hook member provided at the hook member, and the hook member engaging portion has a horizontally swingable swing lever having an engaging portion for engaging with the hook tool on a projecting end side, and the swing lever is wound. It has a tightening bolt that forcibly swings in the direction in which the tension of the belt increases. Scaffolding equipment.