JP3035496B2 - Multi-wire pushing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where a plurality of wires for applying prestress are inserted into a pipe in the formwork in a concrete placing work into a formwork for prestressed concrete. The present invention relates to a multi-wire pushing device and a multi-wire joining device used for such purposes.

[0002]

2. Description of the Related Art A so-called prestressed concrete in which a tensile force is reinforced by applying prestress is widely used in a wide range of construction works. And in order to give this prestress,
High-strength steel, usually PC steel wire or PC steel wire (strand
wire) (hereinafter simply referred to as a wire).

For this reason, as a specific example, for example, in a large-scale bridge construction or the like, an outer diameter of about 15 mm is inserted into a pipe having a length of about 100 m formed in a prestressed concrete formwork constituting the bridge. It is necessary to insert around 10 wires of the above.

For example, Japanese Utility Model Laid-Open Publication No. Hei 7-25009 introduces a PC steel material insertion device as a machine for performing this type of work. In this device, a wire is sandwiched between an upper motor pulley and a lower motor pulley provided vertically with a horizontal axis, and the wire is transferred by reciprocal rotation of the pulley. Compared to the previous method using a general-purpose machine such as a winch,
This device is a dedicated machine for this kind of wire insertion work,
A certain improvement in work efficiency can be expected.

[0005] However, this wire is made of a material having an extremely high elasticity made by twisting a so-called piano wire.
As the thickness of one wire increases, the number of wires used also increases, and the following problems arise accordingly.

That is, since the insertion device has a structure in which a pair of pulleys (rollers) for holding the wire with high pressure are rotated to move the wire, the thickness of the wire alone increases,
And when the number increases, it is necessary to increase the pressure between the pulleys, and together with this, a part of the wire intersects between the pulleys, and a smooth turning operation cannot be obtained, It is not possible to send out all the wires with an equal force, which interrupts the operation and increases the possibility of damage to the pulley shaft. In order to avoid this problem, it is necessary to slow down the rotation speed of the pulley and operate the pulley under sufficient monitoring of the operator. In any case, a reduction in work efficiency is unavoidable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a multi-wire system capable of always achieving a smooth operation even if the thickness or the number of wires is increased and expected to improve the work efficiency. The aim is to obtain a pushing device. A second object of the present invention is to make handling of a plurality of wires easy and simple.

[0008]

According to a first aspect of the present invention, there is provided a multi-wire pushing apparatus comprising: a pair of rollers having at least one outer periphery made of an elastic material and a pair of rollers arranged parallel to each other so that their outer peripheral surfaces can contact each other; A plurality of wires are moved in a direction perpendicular to the roller shaft by rotating the rollers in a direction opposite to each other while rotatably mounted and inserting a plurality of wires between the rollers in a direction perpendicular to the axis. In the multi-wire pushing device, the wire is disposed at one or both of the vicinity of the entrance to the roller and the vicinity of the exit from the roller, and positions the wire in a direction perpendicular to the wire moving direction. a guide mechanism for restraining each single wire, the
The guide mechanism is the base and the direction perpendicular to the wire movement direction.
Vertically installed on the base at predetermined intervals along the direction
The number of pillars and the direction of wire movement of the above guide mechanism
In the vicinity, the axial position of the wire in the column
A guide roller that is constrained inside the
One ends are joined to each other .

According to a second aspect of the present invention, at least one outer periphery is made of an elastic material.
The pair of rollers are moved so that their outer peripheral surfaces can contact each other.
Rotatably mounted on the frame in parallel
With the roller inserted between the rollers from a direction perpendicular to the shaft.
By rotating the rollers in opposite directions,
Move the wires in a direction perpendicular to the roller axis.
In the multi-wire pushing apparatus, the wire
Near the entrance to the roller or the exit from the roller
It is installed on one or both sides
The position in the direction perpendicular to the wire movement direction
A guide mechanism for restraining each single Ya, said plurality of word
One ends of the ears are joined to each other, and the pair of rollers
Attach to the top and bottom of the frame
The upper and lower parts of the frame are hinged together,
Rotating the upper part of the frame around the hinge.
Above the roller attached to the lower part of the frame
It can be opened .

[0010]

FIG. 1 is a structural view showing a multi-wire pushing apparatus according to an embodiment of the present invention. FIG. 1 (1) is a plan view and FIG. 2 (2) is a side view.
In the figure, the wires, rollers, and a guide mechanism to be described later are mainly shown, and the parts having relatively low relation with the present invention, such as a frame on which the rollers and the like are attached, should be simplified as appropriate. Omitted.

In FIG. 1, reference numeral 1 denotes a lower roller rotatably mounted on a lower portion of a frame 2 with its axial direction being horizontal, and is rotatably driven by a not-shown inverter-driven motor and a rotation transmitting mechanism. Reference numeral 3 denotes an upper roller paired with the lower roller 1 and rotatably mounted on the upper portion 4 of the frame with the axial direction also being horizontal and has a structure that is driven by the rotation of the lower roller 1 as described later. . Further, the rotating shaft of the upper roller 3 is attached to the upper frame 4 via a sliding guide so as to be able to move up and down.
Is configured to be able to be pushed down by a spring for applying a desired pressing force to the wire W held between the wire W and the wire W.

The outer circumference of the rollers 1 and 3 is pressed so that a pressing force is evenly applied to the wire W held between the rollers.
An elastic material such as urethane rubber is used. The frame lower part 2 and the frame upper part 4 are joined by a hinge 5 at the right end in the figure, and as shown by a two-dot chain line 4 'in the figure, the frame upper part 4 is rotatable upward about the hinge. It has become.

Reference numerals 6 and 7 denote guide mechanisms provided near the entrances of the wires W to the rollers 1 and 3 and the exits from the rollers 1 and 3, respectively. And a plurality of column members 9 which are vertically attached to and fixed to the base 8 at predetermined intervals along a direction perpendicular to the wire moving direction, that is, in the axial direction of the rollers 1 and 3. Therefore, the figure, especially FIG.
As can be seen from the above, the position of each wire W in the roller axial direction is restricted by the comb structure of the guide mechanisms 6 and 7.

10 and 11 are guide mechanisms 6 respectively.
Guide rollers for restraining the vertical position of the wire W within a certain range in the vicinity of the wires 7 and 7. Guide rollers 12 and 13 are guides for restraining the vertical position of the wire W and both side positions of the wire W. Roller.

Next, the operation will be described. First, wires are transported from a wire maker to a construction site in a form of a desired specification, number and length, wound on a special drum. Each wire attempts to return to a linear shape due to its high elasticity, but this is forcibly wound and accommodated in a strong drum for transport.

As shown at 4 'in FIG. 1 (2), when the frame upper part 4 is tilted upward, each end of the wire W pulled out from the drum is guided from the right to the left in the figure, and the end is moved. At a distance of several meters from the apparatus, the frame upper part 4 is tilted downward to return to a normal position, and a pin mechanism or the like (not shown) is operated to form an integral structure with the frame lower part 2. At this time, each wire W is inserted so that one wire W enters between adjacent pillar members 9.
Adjust the position of. The gap between the adjacent column members 9 has a dimension obtained by adding a margin (about 2 to 3 mm) to the outer diameter of the wire W. The tip of the wire W is integrally joined by a multi-wire joining tool described later, and the tip of this joining tool is
The position of the wire W is adjusted so as to enter the entrance of the pipe formed in the concrete formwork.

With the above, preparation for the insertion operation is completed, and then the inverter is operated to drive the motor to rotate the lower roller 1 in the direction of the arrow. On the other hand, a downward force is applied to the shaft of the upper roller 3 by a spring, and the wire W is pressed and clamped between the rollers 1 and 3, so that the upper roller 3 is driven by the rotation of the lower roller 1. Rotates in the direction of the arrow, and the wire W
In the direction of the arrow (from right to left in the figure). That is, the plurality of wires W are continuously sent out into the pipe in the concrete formwork.

During this time, guide mechanisms 6 and 7 are provided at both the entrance and exit of the rollers 1 and 3, and the roller axial position of each wire W is restrained. The wires W are reliably prevented from crossing each other between the three. Therefore, the pressing force by the rollers 1 and 3 is uniform over all the wires W, and an extremely smooth feeding operation is realized. By the way, the inventors of the present invention performed a feeding operation of a wire having a single unit outer diameter of 15.2 mm, nine simultaneous feedings, and a length of 110 m using a prototype of the multi-wire pushing device according to the present invention, and it took about 1 minute. Was completed. The speed of the roller at the time of starting and stopping is controlled by continuous control by an inverter.

FIG. 2 is a view showing the multi-wire connector mentioned earlier, and FIG. 2 (1) is a view showing a partial cross section of a distal end portion of a wire W joined by the connector, and FIG. ) Is a view of the distal end cap 14 as a connector viewed from the distal end side of the wire;
FIG. 3C is a view of the intermediate sleeve 15, which is also a connector, as viewed from the distal end side of the wire. Here, the case where the number of wires = 12 is shown as an example.

A tip cap 1 having a substantially frustoconical outer shape
Reference numeral 4 denotes a part number, here, three symmetrically arranged wires W, which are introduced into the recessed portion 14a formed therein and engaged and locked. This locking is performed by screwing a screw rod (not shown) into a screw hole 14b formed through the side wall in the radial direction. The intermediate sleeve 15 having a substantially cylindrical outer shape is formed by inserting the above three wires W and the remaining nine wires W symmetrically attached to the outer periphery of the intermediate sleeve 15 together and engaging and joining them. I have. This locking is also performed by screwing a not-shown screw rod (bolt) into a screw hole 15a formed through the side wall in the radial direction, similarly to the tip cap 14.

As described above, using the joints 14 and 15,
If a plurality of wires W are previously bonded to each other in a factory, and the wires W are wound on a drum and carried to a construction site, preparation work on the site becomes extremely simple and the work time is reduced. . Moreover, since the distal end cap 14 is finished in a tapered outer shape whose outer diameter decreases toward the distal end, the wire W proceeds smoothly in the pipe of the formwork.

When the insertion into the pipe in the formwork is completed, it is necessary to release the joining of the tip of the wire W.
Since the method of pressing and locking the wire W with a screw bar screwed into the connector 5a is adopted, each screw bar is loosened to make the joints 14, 15
, And the operation for releasing the connection is simplified, and the connectors 14 and 15 can be reused, which is more economical.

Although FIG. 2 shows the case where the number of wires = 12, when the number of wires is smaller than this, for example, 9
In the case of a book or the like, the internal shape of the intermediate sleeve 15 may be changed to that for nine wires, but the shape shown in FIG. It may be. Conversely, when the number increases, an intermediate sleeve having a larger outer diameter may be provided further rearward (opposite to the distal end) of the intermediate sleeve 15 shown in FIG. 2 to lock the entire wire.

Further, as shown in FIG. 2, when the distal end of the wire W is previously joined by a joining tool, introduction of the distal end of the wire W into the present apparatus, which is the first working step, becomes a problem. As shown in FIG. 1 (2), by introducing the structure in which the upper part of the frame 4 is turned upward and the upper part of the lower roller 1 can be opened, this introduction work can be performed without any trouble. Although the hinge 5 is provided at one end in the moving direction of the wire W in FIG. 1B, the hinge is provided at one end in the axial direction of the rollers 1 and 3 so that the lower frame portion 2 and the upper frame portion 4 are connected to each other. It is good also as a structure which combines.

In the example shown in FIG. 1, the guide mechanism is provided at both the entrance and the exit of the roller. However, the structure provided only at one of them has an effect of preventing wire crossing between the rollers. Further, the cross-sectional shape of the column member 9 of the guide mechanism does not necessarily have to be an oval shape as shown in FIG. 1A, and may be, for example, a circular shape.

In FIG. 1, the rotation direction of the rollers 1 and 3 is fixed, but the rollers 1 and 3 may be rotated in the reverse direction so that both operations of feeding and retracting the wire are possible.

[0027]

As described above, in the multi-wire pushing apparatus according to the first aspect, the wire is disposed near one or both of the vicinity of the entrance to the roller and the vicinity of the exit from the roller. A guide mechanism for restraining a position in a direction perpendicular to the wire moving direction for each of the wires, wherein the guide mechanism includes a base and a wire.
The base at predetermined intervals along the direction perpendicular to the
Consisting of a plurality of pillars vertically planted in the guide
The column shaft of the wire near the moving direction of the mechanism
Equipped with guide rollers that constrain the directional position within a certain range
The ends of the plurality of wires are joined to each other.
Makes it easier to handle the sent wire,
The position of each body can be reliably restrained, and
Wire crossing is reliably prevented, and multiple wires
The extension is always smooth.

Further, in the multi-wire pushing device according to the second aspect , the wire extends to the vicinity of the entrance to the roller.
One or both near the exit from the roller
At right angles to the wire moving direction of the wire.
Guide machine that restricts the position in the direction of
Comprising a structure, one end of the plurality of wires are joined together,
The pair of rollers were attached to the upper and lower portions of the frame, respectively, and the upper and lower portions of the frame were joined by hinges, and the upper portion of the frame was rotated about the hinges to be attached to the lower portion of the frame. Since the upper part of the roller can be opened, a plurality of wires, one ends of which are previously joined, can be introduced into the apparatus without any trouble.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a multi-wire pushing device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a multi-wire connector according to an embodiment of the present invention.

[Explanation of symbols]

1 lower roller, 2 frame lower, 3 upper roller, 4
Upper frame, 5 hinges, 6,7 guide mechanism, 8 bases, 9 pillars, 14 tip cap, 14a recess, 1
4b screw hole, 15 intermediate sleeve, 15a screw hole,
W wire.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 21/12 104 B65H 51/32

Claims (2)

(57) [Claims] 1. A pair of rollers having at least one outer periphery made of an elastic material are rotatably mounted on a frame in parallel with each other so that their outer peripheral surfaces can abut against each other, and a plurality of wires are provided between said rollers and a shaft. By rotating the rollers in opposite directions while inserted from a right angle direction,
In a multi-wire pushing device for moving the plurality of wires in a direction perpendicular to the roller axis, the wire is disposed near one of or both the entrance to the roller or the exit from the roller,
A guide mechanism for restraining a position of the wire in a direction perpendicular to the wire moving direction for each of the wires , wherein the guide mechanism includes a base, and a perpendicular to the wire moving direction.
Vertically planted on the base at predetermined intervals along the direction of
A plurality of pillars, and the wire of the wire is disposed near the wire moving direction of the guide mechanism.
Guide rods that constrain the axial position of the column within a certain range
A multi-wire pushing apparatus , comprising : a plurality of wires, wherein one ends of the plurality of wires are joined to each other . 2. At least one outer periphery is made of an elastic material.
A pair of rollers are set so that their outer peripheral surfaces can contact each other.
Rotatably mounted on the frame parallel to each other,
In the direction perpendicular to the shaft between the rollers
By rotating the rollers in opposite directions,
The wires are moved in a direction perpendicular to the roller axis.
In the multi-wire pushing device, the wire is positioned near the entrance to the roller or at the roller.
Located near one or both of these outlets,
Position of the wire in a direction perpendicular to the wire movement direction
A guide mechanism for restraining each of the wires individually , one ends of the plurality of wires are joined to each other, and the pair of rollers are respectively connected to an upper portion and a lower portion of a frame.
And attach the butterfly to the top and bottom of the frame.
And the above hinges are used as axes.
By rotating the upper part of the
A multi-wire pushing apparatus wherein the upper part of the roller is opened .