JP2582985Y2 - Equipment for manufacturing coiled concrete spacers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF devised Invention The present invention according to the manufacturing apparatus of the coiled concrete spacer over.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Application Laid-Open No. 63-59926, the spiral is formed as one turn of a flat spiral having an opening, the inner diameter of which is slightly larger than the outer diameter of a reinforcing bar, and the pitch of which is the outer diameter of the reinforcing bar. Concrete spacers are known which are slightly larger than the sum of their own thickness.

[0003]

[Problems to be solved by this invention ] Since this spacer is made of mortar, it is weak against tensile force and shear force.
It breaks when a little force is applied. An apparatus that can simplify the production of this spacer is expected.

[0004]

Apparatus for manufacturing a coiled concrete spacer over according to the present invention Means for Solving the Problems] has a pusher portion of the raw material, the helical delivery part, a cutting device. And
The pushing section has a raw material supply port and a vent port, and the spiral sending section has a proximal end connected to the tip of the pushing section, and the tip has a spiral section and an opening. The cutting device is of a stationary type, and its cutting blade is movable forward and backward just before the opening of the spiral feeding portion. The inside diameter of the spiral delivery portion may be large at the base end and small at the tip end.

[0005]

[Function] A raw material is put into a supply port, and a pushing section is started. This pushing section is of a screw type or a cylinder type. The raw material is evacuated of air bubbles through the air vent, becomes dense, and is pushed to the tip. Here, it enters the spiral delivery section and is spirally extruded from the opening at the tip. Here, the product is cut into appropriate dimensions by a cutting device, and a coil body as a product is obtained.

When the inner diameter of the spiral delivery portion is large at the base end and small at the tip, the spacer becomes more dense and the strength increases.

[0007] About one turn of the spacer manufactured by this apparatus is fitted into the reinforcing bar with an opening from the side thereof, and when the opening is turned slightly downward, the spacer hangs on the reinforcing bar. When the spacer is arranged at the intersection of the reinforcing bars, a spacer having an inner diameter twice or more the outer diameter of the reinforcing bar is employed. The spacer is engaged with the crossing portion by fitting it into a crossing reinforcing bar at one end of the opening and twisting the spacer. When the spacer has two or more turns, it is fitted to the reinforcing bar in advance. It hardly falls off even if the rebar vibrates.

[0008]

1 is a mortar, 2 is a fiber material, for example, glass
Fiber. The two are mixed and formed into a coil body 3 to form an opening 4. The number of turns is appropriately determined, but is preferably about one to three turns. As shown in FIG. 4, reference numeral 5 denotes a reinforcing bar, and reference numeral 6 denotes a mold frame, which is assembled by pressing the coil body 3 against the coil body 3 and the diameter of the wire section 3 'forming the coil body 3 in the cross section becomes the cover size L.

FIGS. 2 and 3 show the state of use for the reinforcing bar 5.
As shown in FIG. A single roll is suitable for the intersection of rebars. It is fitted to the intersection at an open portion 4 from an oblique direction, and it is wound around both rebars by screwing it. If the mold 6 is pressed against the coil body 3 and assembled, and concrete is cast, concrete covering corresponding to the diameter of the wire 3 ′ is obtained between the reinforcing bar 5 and the mold 6. When the rebar 5 is only a straight portion, it can be engaged from the side up to two turns, but as shown in FIG.

[0010] Figure 5 is shown a manufacturing apparatus. Reference numeral 21 denotes a raw material feeding section, into which a screw 22 is delivered. The screw 22 is rotated via a belt 24 by an electric motor 23. Reference numeral 25 denotes a raw material supply port, and reference numeral 26 denotes an air vent, which extracts bubbles scattered in the raw material. Reference numeral 27 denotes a helical sending portion whose base end is connected to the tip of the pushing portion 21. The tip is a spiral portion 28 and has an opening 29. The inner diameter of the distal end is smaller than the inner diameter of the proximal end. Numeral 30 denotes a cutting device, which is fixed, and whose cutting blade 31 can move forward and backward just before the opening 29 of the spiral feeding portion 27. In the drawing, 32 is a base, and 33 is a belt conveyor.

In the illustrated apparatus, the electric motor 23 is activated to rotate the screw 22, and the raw material obtained by mixing the mortar 1 and the fiber substance 2 is supplied to the supply port 25. The raw materials are also sent to the destination while being mixed here, and the air bubbles contained therein are removed at the air vent 26 to be dense. The raw material further proceeds into the spiral delivery section 27, and is continuously delivered from the opening 29 in a coil shape while passing through the spiral section 28. Here the cutting device 3
0 is operated intermittently and cut into a predetermined length to obtain the coil body 3.

[0012]

According to the manufacturing apparatus of the present invention, the spiral core
Concrete spacers can be molded continuously and densely,
The cost can be reduced. If the inner diameter of the spiral delivery portion is reduced toward the tip, the denseness is further increased, and a spacer having high strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a specific example of a spacer obtained by a manufacturing apparatus according to the present invention.

FIG. 2 is a side view showing a state where the spacer is arranged at an intersection of a reinforcing bar.

FIG. 3 is a side view of a state where the reinforcing member is arranged on a straight portion of the reinforcing bar.

FIG. 4 is a diagram showing a cover size of concrete.

FIG. 5 is a side view showing a specific example of the manufacturing apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mortar 2 Fiber substance 3 Coil body 4 Opening part 5 Reinforcing bar 6 Formwork 21 Pushing-in part 25 Supply port 26 Extraction port 27 Spiral sending part 28 Spiral part 29 Opening 30 Cutting device 31 Cutting blade

Claims (2)

(57) [Scope of request for utility model registration] 1. A raw material feeding section (21) and a spiral feeding section (27).
And, having a cutting device (30), the pushing section (21) is a raw material supply port (25)
And a bleeding port (26).
(21) connected to the tip, the tip of which is a spiral part (28) and has an opening (29), the cutting device (30) is a stationary type and its cutting blade (31)
Is capable of moving back and forth immediately before the opening (29) of the spiral delivery section (27). 2. The apparatus for manufacturing a coiled concrete spacer according to claim 2, wherein the inner diameter of the spiral feeding portion (27) is large at the base end and small at the front end.