JPH029895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for manufacturing cylindrical reinforcing bars used as the foundations of bridge piers, buildings, etc.

Prior Art For reinforced concrete columns such as bridge piers, a reinforcing bar cage consisting of axial reinforcement as the main reinforcement and ribs for shear reinforcement and restraint of the concrete is used as a foundation.

In some cases, such reinforcing bar cages are assembled on-site, but in cases where it is difficult to secure scaffolding or work efficiency is reduced due to the impact on other work, the reinforcing bar cages are manufactured in advance at a separate location and assembled on-site. There is also a method of transporting the

In this case as well, when it comes to large diameter rebar cages, scaffolding has traditionally been required during the manufacturing process.

An example of manufacturing such a conventional reinforcing bar basket will be explained based on FIG. 8.

FIG. 8 shows a process of welding main reinforcing bars 02 to the outer periphery of a ring-shaped reinforcing bar 01 at predetermined intervals in the longitudinal direction.

The support base 03 has a circularly curved recess formed on its upper surface, and a plurality of longitudinally oriented grooves 04 are formed at predetermined intervals on the inner peripheral surface of the recess, and the main reinforcing bars 02 are formed in the circumferential grooves 04. A ring-shaped reinforcing bar 01 is placed on top of the ring-shaped reinforcing bar 01, and the contact portion with the main reinforcing bar 02 is welded.

Next, set up scaffolding 05 and as shown in the figure, reinforcing bar 0
The main reinforcing bars 02 are welded one by one to the remaining outer periphery of 1 to form a cylindrical assembly.

The circumferential assembly is lifted up by a crane or the like, and a ring-shaped curved rib is wrapped around the cylindrical outer periphery and welded to the main reinforcing bar 02 to form a reinforcing bar cage.

In addition, other conventional examples (Japanese Patent Publication No. 40-8033, Japanese Patent Application Laid-open No. 61-63329, Japanese Utility Model Application No. 106428-1982)
As such, systems that automate the supply, assembly, and welding of reinforcing bars in factory equipment have also been proposed.

Problems to be Solved by the Invention As described above, in the past, when a cylindrical reinforcing cage had a large diameter, it was necessary to construct a scaffold to carry out the work. It is necessary to have equipment in which the

When the work became even larger, workers had to work at heights, which meant that they had to work under equipment designed for use at heights, which inevitably led to a decrease in efficiency.

In addition, in the process of wrapping the ribs around the assembled cylindrical assembly, the assembly had to be pulled up, which required a large number of man-hours and required a large number of workers to wrap and support the ribs. .

Furthermore, in the case of other conventional examples, large-scale equipment at a factory is required to automate the supply, assembly, and welding of reinforcing bars, and reinforcing bar cages are manufactured at any time at the pier construction site or at an appropriate location nearby. It wasn't something I could do.

Moreover, it was not suitable for manufacturing various types of reinforcing bar cages with different diameters.

Means and Effects for Solving the Problems The present invention relates to an apparatus for manufacturing cylindrical reinforcing bar cages that has been devised in view of the above points. At least two rollers arranged with an interval between them, a support base provided with a support member that rotatably supports a spindle of the rollers, and rotating the at least two rollers in the same direction at the same speed. a driving means for driving the plurality of ring-shaped reinforcing bars to the at least two
In an apparatus for assembling a reinforcing bar cage on a cylinder by leaning it on a book roller, coupling a bar-shaped main reinforcing bar to the outer periphery of the ring-shaped reinforcing bar, and further coupling rib cages to the outer periphery, A plurality of reinforcing bar holding protrusions oriented in the longitudinal direction of the roller are formed circumferentially on the outer circumferential surface of the roller, and the supporting member is provided on the support base at appropriate positions perpendicular to the longitudinal direction of the roller. It is characterized by being removably attached to the position.

Further, the present invention includes at least two rollers that have a long cylindrical shape and are arranged parallel to each other and oriented in the horizontal direction with a predetermined interval, and a support shaft of the rollers that is rotatably supported. comprising a support base provided with a support member that rotates the at least two rollers in the same direction and at the same speed,
A plurality of ring-shaped reinforcing bars are placed leaning against the at least two rollers, a rod-shaped main reinforcing bar is connected to the outer periphery of the ring-shaped reinforcing bars, and a rib is further connected to the outer periphery of the ring-shaped reinforcing bars, thereby forming a cylinder. In the apparatus for assembling a reinforcing bar cage in a shape, a plurality of reinforcing bar holding protrusions oriented in the longitudinal direction are formed circumferentially on the outer peripheral surface of the roller, and the supporting member is arranged in the shape of the support base. The rollers are detachably attached to appropriate positions in a direction perpendicular to the longitudinal direction of the rollers, and the spindles of the at least two rollers are each connected to a sprocket connected to a motor and rotatable at the same speed in the same direction by a universal joint. It is characterized by being connected via.

Since the present invention is configured as described above,
The main reinforcing bar is held by the protrusions of the rollers and connected to the outer periphery of the ring reinforcing bar, and at least two rollers with adjustable spacing are used to automatically rotate and connect the two, and then the ribs are connected in the same way. By doing,
Cylindrical reinforcing bar cages can be manufactured efficiently at any appropriate location using a small and lightweight device.

Embodiment An embodiment of the present invention illustrated in FIGS. 1 to 6 will be described below.

FIG. 1 shows an example of an apparatus for manufacturing a cylindrical reinforcing bar cage according to the present invention, and is a plan view thereof.

Two long cylindrical rollers 10 and 11 are installed parallel to each other and oriented in the horizontal direction, and the center shafts 10a and 11a of the circumferential rollers 10 and 11 are connected to the support member 12 at both ends and in the center. Both rollers 10 and 11 are supported by a support shaft 10.
It is integrally and rotatably supported by a and 11a.

A plurality of reinforcing bar holding protrusions 10b, 11b oriented in the longitudinal direction are formed at six locations on the outer peripheral surfaces of the rollers 10, 11 in the circumferential direction.

These protrusions hold the main reinforcing bars during the process of joining the ring reinforcing bars and the main reinforcing bars, as will be described later.

The support member 12 is fixed with a bolt to a support base 23 arranged perpendicular to the longitudinal direction of the roller, but can be moved laterally to the roller by removing the bolt, and can be moved to a predetermined position. Support member 1
A large number of holes 24 for fixing 2 are arranged in the support base 23.

Therefore, when moving the rollers 10 and 11 laterally, the support member 12 is moved to the support stand 23 at an appropriate position.
By fixing them with bolts, the distance between both rollers can be adjusted according to the diameter of the cylindrical reinforcing bar cage.

One end of the support shafts 10a, 11a of the rollers 10, 11 passes through a support member 12 erected on a support base 23 and is connected to a connecting rod 15 via a universal joint 13, and the other end of the connecting rod 15 is connected to a connecting rod 15 via a universal joint 13. It is connected via a universal joint 14 to a rotating shaft 16 supported by a case 22 that includes a drive transmission mechanism therein.

A sprocket 17 is fitted to the other end of the rotating shaft 16, and a chain 18 is installed between the corner sprocket 17 and a sprocket 19 fitted to a drive shaft 20 of a motor 21.

The motor 21 and the sprocket 19 are located in the center of the left and right sprockets 17, and the chain 18 is slightly shifted in the direction of the rotation axis and is connected to the sprockets 17 on both sides.
It is constructed in

Therefore, when the motor 21 is driven, rotation is transmitted to the left and right rotating shafts 16 via the chains 18 on both sides, and each rotation is further transmitted to the rollers 10 and 11 via the connecting rod 15.
are rotated in the same direction and at the same speed.

Further, by rotating the motor 21 in the opposite direction, both the rollers 10 and 11 can be rotated in the opposite direction.

A method for manufacturing a reinforcing bar cage using the above-mentioned reinforcing bar cage manufacturing apparatus will be described below with reference to FIGS. 2 to 6.

First, a bar-shaped main reinforcing bar 2 is placed on one of the rollers 10, and at that time, a plurality of protrusions 10b are provided in the circumferential direction.
The main reinforcing bars 2 are fitted between adjacent protrusions.

Then, the roller 10 on which the main reinforcing bar 2 is placed is slightly rotated inward (in the direction of the arrow in FIGS. 2 and 3).

At this time, the roller 10 has a ring-shaped reinforcing bar 1 between both rollers 10 and 11 (at a predetermined position in the longitudinal direction).
The rollers 10 are rotated to a position where the outer peripheries of the main reinforcing bars 2 and reinforcing bars 1 contact each other when the main reinforcing bars 2 and the reinforcing bars 1 are placed against each other as shown in FIGS. 2 and 3.

Then, reinforcing bars 1 are placed between the rollers 10 and 11 at four locations at predetermined positions in the longitudinal direction of the rollers, and the contact portions of the outer peripheries and the main reinforcing bars 2 are successively welded.

Next, rotate the rollers 10 and 11 to remove the reinforcing bar 1.
The reinforcing bar 2 is rotated about 120 degrees, and the other main reinforcing bar 2 is placed on the roller 10 in the same manner as described above and rotated slightly so that it comes into contact with the outer periphery of the reinforcing bar 1, and the contact portions are sequentially welded.

In the same manner, the reinforcing bar 1 is rotated approximately 120 degrees and another main reinforcing bar 2 is welded.

Figure 2 shows the state where the third main reinforcing bar 2 has been welded.

The above work requires at least two workers, one to support the main reinforcing bars 2 and one to weld them, but once the basic structure of the reinforcing bar cage is formed, the work can be carried out by one worker if necessary. It becomes possible.

After the basic structure of the reinforcing bar cage is completed, the main reinforcing bars 2 are sequentially added and welded to the reinforcing bars 1 while rotating the reinforcing bars 1 by a predetermined angle as shown in Fig. 3. The main reinforcing bars 2 are placed at a predetermined interval on the outer circumference.
A cylindrical assembly is constructed with the welded together.

Next, a large number of ring-shaped ribs 3 are wound around the outer periphery of the cylindrical assembly constructed in this way, as shown in FIGS. 4 and 5.
The lower part of the rib 3 is wound around the outer periphery of the rollers 10 and 11.

The plurality of ribs 3 are arranged so that one end thereof is wound slightly downward from the right side of the cylindrical assembly as shown in FIG. 5, and the ends thereof are aligned.

In this way, the ends of the reinforcing bars 3 and their vicinity are sequentially welded to the main reinforcing bars 2 over the longitudinal direction of the main reinforcing bars 2,
When welding is completed, the rollers 10 and 11 are slightly rotated in the direction of the arrow in Fig. 5 to rotate the cylindrical assembly together with the ribs 3, and the new welded part is rotated to the position of the worker's chest, and the main reinforcing bar is again attached. Weld in the longitudinal direction of 2.

By repeating this operation, the ribs 3 are welded around the entire periphery of the cylindrical assembly, and a reinforcing bar basket is completed here.

As shown in FIG. 6, the spacers 4 can be easily attached to appropriate positions on the outer periphery of the reinforcing bar cage by welding them to the main reinforcing bars 2 while rotating the reinforcing bar cage.

As described above, according to this embodiment, a reinforcing bar cage can be manufactured in a short time by at least two workers.

Additionally, all work is done on the ground, and the position of the welding worker is comfortable, improving work efficiency and reducing work time.

Note that for cylindrical reinforcing bar cages with different diameters, the distance between the rollers 10 and 11 can be adjusted appropriately to perform the work in an optimal state.

Further, although two rollers are used in this embodiment, the number is not necessarily limited to two, and it is also possible to use three or more rollers. For example, as shown in FIG.
By supporting and rotating the rollers 30, 31, and 32, it is possible to manufacture a reinforcing bar cage with a larger diameter without distortion.

In other words, the ring-shaped reinforcing bar between the rollers 30 and 31 is supported by the roller 32 when it slackens due to its own weight, thereby preventing the ring-shaped reinforcing bar from loosening.

In all of the above embodiments, the reinforcing bars were manufactured by welding, but the reinforcing bars and the rib cages may be integrally connected to the main reinforcing bars by wrapping thin wires around them.

Effects of the Invention The present invention has a reinforcing bar holding protrusion formed on the roller, so that when connecting the main reinforcing bar to the ring-shaped reinforcing bar, the main reinforcing bar does not have to be supported manually, making it reliable and efficient. Moreover, since this is formed on the roller, there is no need to provide a member for holding the reinforcing bars separately from the rotating roller, contributing to the reduction in size and weight of the device. In addition, at least two rollers driven in the same direction at the same speed allow the manufacture of reinforcing bar cages while rotating the cylindrical reinforcing bar cage with a balanced rotational force, so workers do not need scaffolding. Able to work safely and efficiently in a comfortable posture without straining.

Furthermore, the roller spacing is adjustable, making it possible to manufacture cylindrical reinforcing cages of any diameter.

Furthermore, the diameter of the rollers used can be smaller than that of the reinforcing cages to be manufactured, and the entire device requires only at least two of these rollers, their support means, and rotation drive means. Achieved smaller size and lighter weight.
Even if it is not a dedicated factory, it can be easily transported to an appropriate location such as a construction site to perform manufacturing work.

[Brief explanation of drawings]

Fig. 1 is a plan view of a reinforcing bar cage manufacturing apparatus according to an embodiment of the present invention, Fig. 2 is a perspective view showing a step of welding main reinforcing bars to the outer periphery of reinforcing bars, and Fig. 3 is a front view of the same.
Fig. 4 is a perspective view showing the reinforcing bars wrapped around the outer circumference of the cylindrical assembly, Fig. 5 is a front view of the same, and Fig. 6 is the state in which spacers are attached to the outer circumference of the completed reinforcing bar cage. FIG. 7 is a front view of another embodiment, and FIG. 8 is an explanatory diagram for explaining a conventional method of manufacturing a reinforcing bar cage. 1... Reinforcement bar, 2... Main reinforcing bar, 3... Rib bar, 4
. . . Spacer, 10 . 13, 14... Universal joint, 15... Connecting rod, 16... Rotating shaft, 17...
Sprocket, 18... Chain, 19... Sprocket, 20... Drive shaft, 21... Motor, 2
2... Box, 23... Support stand, 24... Hole, 3
0, 31, 32... Laura.

Claims (1)

[Claims] 1. At least two rollers having a long cylindrical shape, parallel to each other, oriented in the horizontal direction, and arranged at a predetermined interval, and rotating a spindle of the rollers. a support stand provided with a support member that supports freely;
a driving means for rotating the at least two rollers in the same direction at the same speed; a plurality of ring-shaped reinforcing bars are placed leaning against the at least two rollers; and the outer periphery of the ring-shaped reinforcing bars is In an apparatus for assembling a reinforcing bar cage on a cylinder by joining bar-shaped main reinforcing bars to the outer periphery of the main reinforcing bars and further joining cost bars to the outer periphery of the main reinforcing bars, the outer periphery of the roller has protrusions for holding the reinforcing bars oriented in the longitudinal direction. A plurality of cylindrical reinforcing bars are formed in a circumferential direction, and the support member is detachably attached to the support base at an appropriate position in a direction perpendicular to the longitudinal direction of the roller. Manufacturing equipment. 2. At least two rollers having a long cylindrical shape, parallel to each other, oriented in the horizontal direction, and arranged at a predetermined interval, and a support member that rotatably supports the spindle of the rollers. a support stand provided with;
a driving means for rotating the at least two rollers in the same direction at the same speed; a plurality of ring-shaped reinforcing bars are placed leaning against the at least two rollers; and the outer periphery of the ring-shaped reinforcing bars is In an apparatus for assembling a reinforcing bar cage in a cylindrical shape by joining bar-shaped main reinforcing bars to the outer periphery of the main reinforcing bars and further joining rib cages to the outer periphery of the main reinforcing bars, the outer circumferential surface of the roller has protrusions for holding the reinforcing bars oriented in the longitudinal direction thereof. A plurality of support members are formed in the circumferential direction, and the support member is removably attached in the form of a support base at an appropriate position in a direction perpendicular to the longitudinal direction of the rollers, 1. An apparatus for manufacturing a cylindrical reinforcing bar cage, characterized in that each sprocket is connected to a motor and is rotatable in the same direction at the same speed via a universal joint.