JPH1181678A - Grouting device for reinforcing bar joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of grouting a joint screwed with a threaded reinforcing bar 1 at a remote position with good workability. SOLUTION: This device grouting the injection hole 2a of a joint 2 screwed with a screw reinforcing bar 1 is provided with an injection nozzle 8 inserted into the injection hole 2a, a grout feeder, and a hose 6 connecting them. The injection nozzle 8 is fixed at the center section in the peripheral direction of a C-shaped plate spring (holder) 10. The tip of the injection nozzle 8 is protruded to the inside of the plate spring 10. When the plate spring 10 is fitted to hold the outer periphery of the joint 2, the injection nozzle 8 is kept at the inserted state into the injection hole 2a. Grout is injected into the joint 2 from the grout force feeder via the hose 6 and the injection nozzle 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grouting apparatus for a reinforcing bar joint.

[0002]

2. Description of the Related Art As shown in FIG. 5, a method of connecting threaded rebars 1 to each other by screwing an end of the threaded rebar 1 to a joint 2 is well known. Further, it is also known that grout is injected from an injection hole formed in the joint 2 in order to increase the connection strength, and the gap between the inner peripheral surface of the joint 2 and the outer peripheral surface of the screw reinforcing bar 1 is filled with grout. ing. When injecting grout, an injection gun is used. A general injection gun has an injection nozzle at the tip, and the grout is injected by triggering the injection gun with the tip of the injection nozzle inserted into the injection hole of the joint.

[0003] When grouting work needs to be performed in a narrow place where rebars are crowded, it becomes difficult to perform the grouting work with the injection gun configured as described above. Therefore, as shown in FIG. 5, a device has been developed in which the main body 5 (compressor) of the injection gun and the injection nozzle 7 are separated, and the two are connected via a hose 6. In this device, one worker has the injection nozzle 7
Was inserted into the injection hole of the joint 2 and held, and grout was injected into the joint 2 by another operator operating the main body 5.

[0004]

However, in the injection apparatus having the above-mentioned structure, grout injection must be performed by two workers, and the work efficiency is poor.

[0005]

According to a first aspect of the present invention, there is provided an apparatus for injecting grout into an injection hole of a joint to which an end of a threaded bar is screwed, the injection nozzle having a tip inserted into the injection hole. , Comprising a pump for pumping grout and a hose connecting the base end of the injection nozzle and the pump.
A holder for holding the injection nozzle is provided, the holder being detachably attached to the joint, and holding a state in which a tip of the injection nozzle is inserted into an injection hole.

According to a second aspect of the present invention, in the grout injection device for a rebar joint according to the first aspect, the holder comprises
The injection nozzle is fixed to the spring, the tip of the injection nozzle protrudes inside the spring, and the spring is attached to the joint so as to hold the outer periphery of the joint. The invention of claim 3 is claim 1
In the grouting apparatus for a rebar joint according to the above, the holder includes a main body and a pressing mechanism, the main body,
A backrest portion corresponding to a portion of the joint opposite to the injection hole, a support portion for slidably supporting the injection nozzle in a direction to approach and separate from the backrest portion; A connection portion for connecting one side of the portion, and an opening for passing a joint between the other side of the backrest portion and the other side of the support portion is formed. ,
It is characterized in that it is pressed against the injection hole of the joint arranged between the backrest and the injection nozzle.

According to a fourth aspect of the present invention, in the grouting apparatus for a rebar joint according to the third aspect, the pressing mechanism includes a spring for urging the injection nozzle. According to a fifth aspect of the present invention, in the grouting apparatus for a rebar joint according to the fourth aspect, the pressing mechanism is slidably supported by the support portion in parallel with the injection nozzle, and A connection member for connecting the slide rod to the injection nozzle, a knob provided on the slide rod, and the spring for biasing the slide rod are provided.

According to a sixth aspect of the present invention, in the grouting apparatus for a rebar joint according to the third aspect, the pressing mechanism is disposed behind the supporting portion, and the pressing mechanism is connected to the first, second, and third links. One end of each of the first, second, and third links is rotatably connected to a common fulcrum, and the other end of the first link is rotatably connected to the main body. 2
The other end of the link is pivotally connected to the injection nozzle,
A third link extends in a direction intersecting the sliding direction of the injection nozzle, the urging means is connected to the third link, and the urging means slides the common fulcrum through the third link to slide the injection hole. The injection nozzle is moved toward the injection hole of the joint via the first and second links by moving the injection nozzle in a direction intersecting the direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an injection apparatus according to a first embodiment of the present invention will be described with reference to FIG. This injection device includes an injection gun main body 5 (compressor), a hose 6, and an injection nozzle 8, similarly to the device of FIG. The gun body 5 is omitted in FIG. Further, the injection device of the present embodiment has a C
A leaf spring 10 (holder) having a letter shape is provided. The leaf spring 10 has a diameter equal to or slightly smaller than the outer diameter of the joint 2. An injection nozzle 8 is fixed to a center part of the leaf spring 10 in the circumferential direction by a fixing tool 15. Injection nozzle 8
Has a distal end projecting inside the leaf spring 10 and a proximal end projecting outside the leaf spring 10 and being connected to the hose 6.
An opening 11 for passing the joint 2 is provided between both ends of the leaf spring 10.
Are formed. The circumferential dimension of the opening 11 is smaller than the outer diameter of the joint 2. Both ends of the leaf spring 10 are not caught when passing the joint 2 so that they can pass smoothly.
An outward turning portion 12 is formed.

A grouting operation using the above-described injection device will be described. After screwing the end of the threaded rebar 1 to the joint 2, the leaf spring 10 is moved closer to the joint 2 while aligning the tip of the injection nozzle 8 with the injection hole 2 a of the joint 2. Then, the leaf spring 10 expands while being elastically deformed, the joint 2 passes through the opening 11, and the leaf spring 10 returns to the original shape or a state close to the original shape, and is attached to the outer periphery of the joint 2. At the same time, the tip of the injection nozzle 8 is inserted into the injection hole 2a.

As described above, since the leaf spring 10 is mounted on the outer periphery of the joint 2, the injection nozzle 8 is connected to the injection hole 2a.
The state inserted in is maintained. Therefore, the worker
By operating the injection gun body 1 after the setting of the injection nozzle 8, the grout injection operation can be performed by one person, and the operation efficiency can be improved. In the injection device of the present embodiment, the holder of the injection nozzle 8 is a plate spring 10
Since it is only a configuration, it is small and can be easily used even in a place where a reinforcing bar is very crowded. Further, the cost is low because the configuration is simple. When the injection operation is completed, the leaf spring 10 and the injection nozzle 8 can be removed from the joint 2 by pulling the leaf spring 10 backward with the fixture 15.

FIG. 2 shows an injection device according to a second embodiment. In this apparatus, an elongated rod-shaped injection nozzle 9 is used. The holder 20 for the injection nozzle 9 includes a main body 21 and a pressing mechanism 30. Body 21
Has a relatively thick plate member 22, two blocks 23 and 24 fixed to one side of the plate member 22 at a distance back and forth, and a handle 25 fixed to the other side. The tip portion 22a of the plate member 22 is bent in a key shape and faces the block 23 (support portion), and is provided as a backrest portion. In the plate member 22, a portion between one side of the backrest portion 22a and one side of the block 23 is a connecting portion 22 for connecting the two.
b. The main body 10 has an opening 26 between the other side of the back portion 22a and the other side of the block 23, facing the connecting portion 22b.

The block 23 is formed with two guide holes 23a and 23b which are parallel to each other. The injection nozzle 9 is provided in one guide hole 23 a with the backrest 2.
It is slidably inserted in the direction approaching and separating from 2a. A U-groove 24a and a guide hole 24b are formed in another block 24 disposed behind the block 23. The hose 6 is connected to the base end of the injection nozzle 9 while being inserted into the U groove 24a.

The pressing mechanism 30 is arranged in parallel with the injection nozzle 9 to guide the guide holes 2 of the blocks 23 and 24.
A slide rod 31 slidably supported by 3b and 24b, a connecting member 32 for connecting the slide rod 31 to the injection nozzle 9, a knob 33 provided on the slide rod 31, and a coil for urging the slide rod 31 And a spring 34.

When the coil spring 34 is wound around the slide rod 31, the knob 33 and the block 24
And in a compressed state. The slide rod 31 is urged forward by the coil spring 34,
The injection nozzle 9 connected to the slide rod 31 is also urged forward, that is, toward the backrest 22a.

When the holder 20 having the above configuration is not in use, the knob 33 is in contact with the block 23 by the force of the coil spring 34, and the injection nozzle 9 is
It is at the position closest to 2a. At the time of grout injection work, the slide rod 31 is pulled rearward with the knob 33 against the coil spring 34, and the injection nozzle 9 is retreated together therewith. In this state, the joint 2 is
The joint 2 is disposed between the backrest 22a and the injection nozzle 9 by moving the holder 20 so as to pass through.

Further, the posture of the holder 20 is adjusted so that the tip of the injection nozzle 9 faces the injection hole 2a of the joint 2, and the backrest 22a is positioned on the side opposite to the injection hole 2a of the joint 2. Apply to the site. Knob 3 in this state
By releasing 3, the injection nozzle 9 is fitted into the injection hole 2 a by the force of the coil spring 34. By sandwiching the joint 2 between the backrest 22a of the holder 20 and the injection nozzle 9,
The holder 20 is attached to the joint 2 and the injection nozzle 9 is prevented from coming off. The grouting operation after setting the holder 20 is the same as that of the first embodiment, and therefore the description is omitted. After the injection operation, the holder 20 and the injection nozzle 9 are detached from the joint 2 by pulling the knob 33 and moving the holder 20 sideways.

The holder 20A of the injection device according to the third embodiment shown in FIG. 3 also includes a main body 21A and a pressing mechanism 40 as in the second embodiment. The main body 21A has a plate member 22, a block 23, and an opening 26, similarly to the main body 20 of the second embodiment. Further, the main body 21A includes a plate member 22.
And an auxiliary plate 29 which is bent integrally.

The pressing mechanism 40 of the holder 20A includes:
The first, second, and third links 41, 42, 43, the slider 44, and the cam member 4 are disposed behind the block 23.
5 (cam means, biasing means). The slider 44 is accommodated in a guide groove 29 a formed in the auxiliary plate 29 so as to be slidable in the same direction as the injection nozzle 9.
The injection nozzle 9 is fixed to the slider 44 by a fixture 46.

One end of each of the links 41, 42, 43 is rotatably connected to each other at a common fulcrum. Link 4
The other end of 1 is rotatably connected to the auxiliary plate 29.
The other end of the link 42 is rotatably connected to the slider 44 and the injection nozzle 9. The link 43 is connected to the injection nozzle 9.
, And protrudes to the opposite side through the insertion hole 22 c of the plate 22. A lever-shaped cam member 45 is rotatably connected to the other end of the link 43. The cam surface 45a of the cam member 45
Are in contact with the plate member 22.

In the above-described injection device, after the joint 2 is disposed between the back support member 22a of the holder 20A and the injection nozzle 9 in the same manner as in the second embodiment, the cam member 45 is tilted in the direction A. Then, the common fulcrum moves in the direction B (direction substantially perpendicular to the sliding direction of the injection nozzle 9) via the link 43 by the cam action, and the crossing angle of the links 41 and 42 increases with this, and the injection nozzle 9 moves forward. I do. Then, the tip of the injection nozzle 9 is fitted into the injection hole 2a of the joint 2 at the advanced position, and is held as it is pressed. Other configurations and operations are the same as those of the second embodiment.

The holder 20B of the fourth embodiment shown in FIG. 4 has a main body 21A similar to that of the third embodiment and a pressing mechanism 40A similar to that of the third embodiment. However, in this pressing mechanism 40A, the cam member 4
Instead of 5, a coil spring 49 is used as an urging means. The spring 49 is arranged in a compressed state between a spring receiver 43 a provided at the other end of the link 43 and the plate 22. In this configuration, the injection nozzle 9 is retracted by pressing the spring receiver 43a as illustrated,
By releasing the spring receiver 43a, the spring 49 is released.
Later, the injection nozzle 9 moves forward and the injection hole 2a of the joint 2 is formed.
It is designed to fit in.

[0023]

As described above, according to the first aspect of the present invention, since the injection nozzle can be held in a state of being fitted into the injection hole of the joint, the injection operation can be performed by one person. Performance can be improved. According to the second aspect of the present invention, since the holder has a configuration in which the injection nozzle is merely attached to the C-shaped spring, the holder is small, and can be easily operated particularly in a place where the reinforcing bar is complicated. Also, since the configuration is simple, the manufacturing cost can be reduced. According to the third aspect of the present invention, since the joint is sandwiched between the pressed injection nozzle and the backrest of the holder, the injection nozzle can be reliably held. According to the fourth aspect of the present invention, since the injection nozzle is pressed against the joint by the spring, the injection nozzle can be reliably prevented from coming off. According to the invention of claim 5, by moving the slide rod with the knob, the injection nozzle can be inserted into and removed from the injection hole of the joint by a simple operation. According to the invention of claim 6, the injection nozzle can be inserted into and removed from the injection hole of the joint by using the link mechanism, and the injection nozzle can be reliably held in the inserted state. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a grout injection device according to a first embodiment of the present invention.

FIGS. 2A and 2B show a main part of a grout injection apparatus according to a second embodiment of the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a side view as viewed from the right in FIG.

3A and 3B show a main part of a grout injection apparatus according to a third embodiment of the present invention, wherein FIG. 3A is a plan view and FIG. 3B is a side view as viewed from the right in FIG.

FIG. 4 is a plan view showing a main part of a grout injection device according to a fourth embodiment of the present invention.

FIG. 5 is a side view showing the entire grouting device of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Threaded reinforcing bar 2 Joint 2a Injection hole 5 Injection gun main body (compressor) 6 Hose 8, 9 Injection nozzle 10 Leaf spring (holder) 20, 20A, 20B Holder 21, 21A Main body 22a Backrest 22b Connection 23 Block (support) Part) 30 pressing mechanism 31 slide rod 32 connecting member 33 knob 34 coil spring (spring) 40, 40A pressing mechanism 41 to 43 link 44 slider 45 cam member (cam means, urging means) 49 coil spring (spring, urging means) )

Claims (6)

[Claims] An apparatus for injecting grout into an injection hole of a joint to which an end of a threaded bar is screwed, an injection nozzle having a tip inserted into the injection hole, a pressure feeder for pumping the grout, and an injection nozzle A hose that connects the base end of the pump and the pumping device, and a holder that holds the injection nozzle, the holder is detachably attached to the joint,
A grout injection device for a rebar joint, wherein a tip of the injection nozzle is kept inserted into an injection hole. 2. The joint according to claim 1, wherein the holder is formed of a C-shaped spring, the injection nozzle is fixed to the spring, and a tip of the injection nozzle protrudes inside the spring, and the spring holds the outer periphery of the joint. The grouting device for a reinforcing joint according to claim 1, wherein the grouting device is attached to a grout. 3. The holder has a main body and a pressing mechanism, and the main body moves the injection nozzle toward and away from the back support, which is a part of the joint opposite to the injection hole. A supporting portion that slidably supports in a direction in which the backing portion is connected to the other side of the backing portion and the other side of the supporting portion. An opening for passing a joint therebetween is formed, and the pressing mechanism presses the injection nozzle toward an injection hole of a joint disposed between the backrest portion and the injection nozzle. The grout injection device for a reinforcing bar joint according to claim 1. 4. The grout injection device for a rebar joint according to claim 3, wherein the pressing mechanism includes a spring for urging the injection nozzle. 5. A slide rod parallel to the injection nozzle and slidably supported by the support portion, a connecting member connecting the slide rod to the injection nozzle, and the slide rod. The grout injection device for a rebar joint according to claim 4, further comprising a knob and a spring for urging the slide rod. 6. The pressing mechanism is disposed behind the support portion and includes first, second, and third links and biasing means, and one end of each of the first, second, and third links. Are rotatably connected to a common fulcrum, the other end of the first link is rotatably connected to the main body, the other end of the second link is rotatably connected to the injection nozzle, and the third link is Extends in a direction intersecting the sliding direction of the injection nozzle, the urging means is connected to the third link, and the urging means intersects the common fulcrum with the sliding direction of the injection hole via the third link. The grout injection device for a rebar joint according to claim 3, wherein the injection nozzle is moved toward the injection hole of the joint via the first and second links by moving the injection nozzle in the direction in which the grout is injected.