JP3230710U - Anchor diagnostic device for concrete structures - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor diagnostic device for a concrete structure, which is easy to perform diagnostic work and can reduce the burden on an operator. An anchor diagnostic device is an exposed portion of an anchor bolt attached to a long rod portion 10, a vibration head portion 20 provided at the tip of the rod portion, and a vibration head portion and fixed to a concrete structure. A contact guide portion 30 having a pair of contact guide pieces arranged so as to sandwich the anchor bolts, a drive portion 40 for vibrating the vibrating head portion to continuously hit the exposed portion of the anchor bolt, and a rod portion provided at the base end of the rod portion. The grip portion 50 is provided, and a power supply unit 60 and a switch 70 for operating the drive unit are provided. [Selection diagram] Fig. 1

Description

The present invention relates to a diagnostic device for anchors constructed on concrete structures.

Conventionally, in the fields of civil engineering and construction and machinery and equipment, anchors (anchor bolts) have been used to fix structural members and equipment to concrete structures. For example, in a tunnel structure, a precast plate is fixed to the inner surface by anchor bolts, and a ceiling plate is suspended by anchor bolts. In buildings such as buildings, equipment such as air conditioners are installed on the floor and walls with anchor bolts and hung from the ceiling.

The tensile strength and pull-out strength of anchor bolts decrease over time due to corrosion of the bolt body, cracks in concrete, and deterioration. In addition, it is repeatedly vibrated when the vehicle passes through or when the machine is powered. For this reason, regular inspections are conducted to check whether the anchor bolts maintain sufficient function and soundness and whether the nuts are loose. In the conventional inspection, an operator hits an anchor bolt with a hammer, and a tapping sound inspection is widely performed in which the sound (reverberation sound) generated by the tapping is heard and diagnosed.

A diagnostic method and device (Patent Document 1) that measures the natural frequency of an anchor bolt and compares it with the natural frequency of a normal anchor bolt to diagnose the soundness, as opposed to the conventional tapping sound inspection, and a pulsed magnetic field on the anchor bolt. (Patent Document 2) is known as a diagnostic method in which vibration is detected by applying an anchor bolt, and an evaluation method (Patent Document 3) in which an accelerometer is placed on the exposed end face of an anchor bolt to improve the reliability of diagnosis. Has been done.

Japanese Unexamined Patent Publication No. 2004-325224 Japanese Unexamined Patent Publication No. 2015-99060 Japanese Patent No. 5897199

However, since the diagnostic methods and evaluation methods of Patent Documents 1 to 3 use a measuring device or a measuring machine, the accuracy of the diagnosis is improved, but there is a problem that the diagnosis takes time. Further, the conventional hammering sound inspection has a problem that the worker has to hit all the anchor bolts in the inspection range with a hammer, and the work load is very heavy. For example, when checking the hitting sound of anchor bolts from the inner surface of a tunnel, the worker must face up and check the hitting sound of hundreds of places on the work vehicle while moving from place to place, which is troublesome and hammers. It was a task to wear down the nerves to distinguish the sounds.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an anchor diagnostic device for a concrete structure, which is easy to perform diagnostic work and can reduce the burden on workers.

In order to solve the above problems, the anchor diagnostic device for the concrete structure according to the present invention is
A pair of contact guide pieces attached to a long rod portion, a vibration head portion provided at the tip of the rod portion, and an exposed portion of an anchor attached to the vibration head portion and fixed to a concrete structure. A contact guide portion provided with a contact guide portion, a drive portion for vibrating the vibrating head portion to continuously hit the exposed portion of the anchor, a grip portion provided at the base end of the rod portion, and a power supply for operating the drive portion. Its main feature is that it has a part and a switch.

The second feature of the anchor diagnostic device for a concrete structure according to the present invention is that the drive unit is composed of a vibration motor in which a vibrator is attached to a rotating shaft and vibration is generated by the rotation of the rotating shaft. To do.

The third feature of the anchor diagnostic device for a concrete structure according to the present invention is that the rod portion is expandable and contractible.

In the anchor diagnostic device for a concrete structure according to the present invention, the vibration head portion and the contact guide portion vibrate at the same time by driving the drive portion, and the exposed portion of the anchor is caused by either or both of the vibration head portion and the contact guide portion. The fourth feature is that it is continuously beaten.

In the anchor diagnostic device for a concrete structure according to the present invention, a tapping sound collecting portion is provided in either the vibration head portion or the contact guide portion, and the tapping sound output portion collected in the sound collecting portion is a gripping portion. The fifth feature is that it is provided in.

As described above, according to the anchor diagnostic device for the concrete structure according to the present invention, the operator fixes the vibrating head portion attached to the tip of the rod portion to the concrete structure while being guided by the contact guide portion. The anchor can be diagnosed by continuously tapping the exposed part of the anchor simply by setting it facing the exposed part of the anchor and vibrating the vibrating head part. Compared with the conventional hammer tapping sound inspection, the diagnostic work is easier and the burden on the operator can be significantly reduced.

In addition, by using the anchor diagnostic device, it is possible to perform anchor diagnostic work in a wide range from a low position to a high place of a concrete structure, and it is possible to significantly reduce the time required for the diagnostic work. It works.

The embodiment of the present invention is shown, and the overall side view of the anchor diagnostic apparatus, Overall side view showing the extended state of the anchor diagnostic device, Enlarged side view showing the main parts of the anchor diagnostic device, Enlarged plan view showing the main parts of the anchor diagnostic device, (A) is a side view of the drive unit, (B) is a plan view of the drive unit, Explanatory drawing showing how to diagnose anchor bolts in a tunnel using an anchor diagnostic device, (A) and (B) are explanatory views showing the operation of the anchor diagnostic device. Explanatory drawing showing the operation of the anchor diagnostic device, (A) is a cross-sectional view of the tunnel, (B) is an enlarged view of the circle A in (A), and is a view showing a state in which anchor bolts are fixed to the tunnel.

The best embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 9 show an embodiment of the present invention, in which reference numeral S is an anchor diagnostic device.

The anchor diagnostic device S diagnoses the soundness of the anchor fixed to the concrete structure, and the concrete structure includes civil engineering buildings such as tunnels, bridges and dams, and building structures such as buildings, apartments and factories. included. Anchors include anchor bolts and mounting nuts. The concrete structure of FIG. 9 shows a tunnel T, and an inner wall panel 2 is attached to the lining concrete 1 by anchor bolts 3 and mounting nuts 4.

As shown in FIG. 1, the anchor diagnostic device S includes a long rod portion 10, a vibration head portion 20 provided at the tip of the rod portion 10, a contact guide portion 30 attached to the vibration head portion 20, and a contact guide portion 30. It includes a drive unit 40 for vibrating the vibration head unit 20, a grip unit 50 provided at the base end of the rod unit 10, a power supply unit 60 for operating the drive unit 40, and a switch 70.

The length of the rod portion 10 can be adjusted according to the position and height of the anchor (see FIGS. 1 and 2), and the rod portion 10 is composed of stretchable multi-stage rod constituent members 11 to 13. The inside of the rod portion 10 is hollow so that wiring can be performed, and the material is made of lightweight aluminum, stainless steel, carbon material, or the like.

The vibration head portion 20 is provided at the tip of the rod portion 10. Specifically, a vibration head portion 20 extending forward via a bent portion 11a is provided at the tip of the rod constituent member 11. The vibration head portion 20 vibrates back and forth and / or left and right by the drive of the drive portion 40, and the exposed portion of the anchor to be inspected is finely tapped by the striking portion 21 (see FIG. 4) at the tip at a predetermined frequency. It has become.

The contact guide portion 30 guides the vibrating head portion 20, and is attached to the tip of the vibrating head portion 20. Specifically, as shown in FIG. 4, a plate-shaped contact guide portion 30 that bends in a U shape in a plan view is attached to the tip of the vibration head portion 20. The plate-shaped contact guide portion 30 is composed of a support plate 31 attached to the tip of the vibration head portion 20 and a pair of contact guide pieces 32, 32 that bend forward from the left and right sides of the support plate 31.

Each of the contact guide pieces 32, 32 surrounds the exposed portion of the anchor so as to sandwich it from the left and right during the diagnosis work of the anchor (see FIG. 8), thereby stabilizing the striking operation of the vibration head 20 on the exposed portion of the anchor. It serves as a performer, and has a shape that spreads toward the tip, widening to the left and right. In addition, each of the contact guide pieces 32, 32 vibrates when the vibration head portion 20 vibrates, and also exerts an action of finely tapping the exposed portion of the anchor to be inspected.

The drive unit 40 generates vibration in the vibration head portion 20, and is attached to the bent portion 11a on the back surface of the vibration head portion 20 by a band 46. The drive unit 40 is composed of a vibration motor. As shown in FIG. 5, the vibration motor includes a motor body 42 in a casing 41, and an eccentric weight (vibrator) 44 for vibration is provided on a rotating shaft 43 of the motor body 42. It is attached, and the rotation of the rotating shaft 43 generates vibration and transmits the vibration to the vibration head portion 20. Reference numeral 45 is an adjustment weight.

The grip portion 50 is provided at the base end of the rod portion 10, and a thick sponge-like grip member 51 is attached around the grip portion 50. A switch 70 for operating vibration on / off is attached to the upper part of the grip portion 50.

The power supply unit 60 is for operating the drive unit 30, and is composed of a case 61 and a battery 62 built in the case 61. The power supply unit 60 is a small and lightweight type (about 1 to 3 kg) that can be gripped, and can be attached to the waist belt of the diagnostic worker via a hanging tool. The battery 62 is provided with a power cord (not shown) so that electric power can be stored.

A cable 63 extends from the power supply unit 60 to the drive unit 40 via the switch 70, and the cable 63 from the switch 70 to the drive unit 30 is arranged inside the rod unit 10 on the way. The cable 63 is supported by a rod component 11 of the rod portion 10 by a band 64.

Next, using the anchor diagnostic device S configured as described above, the procedure for diagnosing the anchor will be described below with reference to FIGS. 6 and 6 by taking an anchor fixed in the tunnel as an example.

9 (A) shows a cross-sectional view of the tunnel T, and FIG. 9 (B) shows an enlarged view of the circle A of (A). As shown in the figure, in the tunnel T, a precast plate 2 is attached to the lining concrete 1 in an arch shape by an anchor bolt (anchor) 3 and a mounting nut 4.

The worker attaches the power supply unit 60 shown in FIG. 1 to the waist belt, and adjusts to the distance (height / position) to the anchor bolt 3 to be inspected in the tunnel T or on the work vehicle, and adjusts the rod portion 10 to the rod portion 10. The length is adjusted, the grip portion 50 is held in the hand, the switch 70 is operated (on), and the vibration head portion 20 is vibrated.

As shown in FIG. 6, the worker W brings the vibrating head portion 20 closer to the exposed portion (nut 4) of the anchor bolt 3 to be inspected as shown by the arrow while keeping the vibrating head portion 20 vibrating, and FIG. As shown in FIGS. 7 (A) to 7 (B), when the vibration head portion 20 is brought into contact with the vibration head portion 20, the striking portion 21 of the vibration head portion 20 strikes the exposed portion (nut 4) of the anchor bolt 3 and reflects the vibration. The sound (tapping sound) reaches the worker.

Further, the contact guide pieces 32, 32 of the contact guide portion 30 vibrate due to the vibration M, and the exposed portion (nut 4) of the anchor bolt 3 is struck, and the reflected sound (striking sound) reaches the operator. The operator can diagnose the soundness of the anchor bolt 3 by listening to these reflected sounds.

When the anchor bolt 3 is not normally fixed (when the nut 4 is loose), the reflected sound is higher than when the anchor bolt 3 is normally fixed (hard sound, high frequency sound). Since the sound has a low frequency, it can be determined that the anchor bolt 3 is not normally fixed.

Since the U-shaped contact guide portion 30 is attached to the tip of the vibration head portion 20, as shown in FIG. 8, the left and right contact guide pieces 32, 32 are sandwiched between the exposed portions (nuts 4) of the anchor bolts 3. By arranging the bolts in the above position, the vibrating head portion 20 being vibrated can be easily brought into contact with the exposed portion (nut 4) of the anchor bolt 3 while being guided by the contact guide portion 30, and can be stably and continuously tapped.

Further, since the left and right contact guide pieces 32 and 32 are also vibrating at the same time, the exposed part of the anchor bolt 3 (the exposed part (nut 4) can be brought into contact with the left and right contact guide pieces 32 and 32 by bringing them into contact with the exposed part (nut 4) of the anchor bolt 3. The nut 4) can be continuously tapped, and the tapping work is very easy.

In particular, since the anchor bolt 3 attached to the tunnel T has a height and a distance (for example, 2 m to 10 m) from the position of the operator, the U-shaped or U-shaped contact guide portion 30 vibrates. The head portion 20 and the contact guide portion 30 can be easily contacted and tapped on the exposed portion of the anchor bolt 3 to be inspected, and the diagnostic work becomes very easy. Compared with the conventional method, the load on the operator is greatly reduced, and by constantly generating a stable tapping sound, the diagnostic work can be efficiently advanced.

After the diagnosis of the first anchor bolt 3 is completed, the switch 70 is operated (off) to move to the next diagnosis location of the anchor bolt 3. After moving to the next diagnosis location of the anchor bolt 3, the diagnosis work of the anchor bolt 3 is continued according to the above procedure.

According to the anchor diagnostic device S of the present embodiment, the worker W fixed the vibration head portion 20 attached to the tip of the rod portion 10 to a concrete structure such as a tunnel T while being guided by the contact guide portion 30. The anchor can be diagnosed by continuously tapping the exposed portion of the anchor only by setting it facing the exposed portion of the anchor and vibrating the vibration head portion 20. Compared with the conventional hammer tapping sound inspection, the diagnostic work becomes easier and the burden on the operator can be significantly reduced.

Further, when the anchor diagnostic device S of the present embodiment is used, the anchor diagnostic work can be performed in a wide range from a low position to a high place of the concrete structure, and the diagnosis work can be significantly shortened. ..

In the present embodiment, the rod portion 10 of the anchor diagnostic device S can be expanded and contracted, but the present invention is not limited to this, and the rod portion 10 may be composed of one constituent member.

In the anchor diagnostic device, a tapping sound collecting unit (sound collecting microphone) is attached to a part of the vibration head portion 20 or a part of the contact guide portion 30, and a tapping sound output unit is provided in the grip portion 50. Good. If the distance from the anchor bolt to be inspected to the worker is long, it may be difficult to hear the tapping sound due to noise or the like. In this case, the tapping sound collected by the sound collecting unit is transmitted to the output unit of the gripping unit 50 by a cable or short-range wireless communication, the tapping sound is output from the output unit, and the worker judges based on the output tapping sound. By doing so, the anchor diagnosis can be sufficiently supported. The output of the tapping sound collected by the sound collecting unit may be adjusted so that the worker can hear it with an earphone.

As described above, the anchor diagnostic apparatus of the present invention can efficiently perform anchor diagnostic work from a low position to a high place of a concrete structure while reducing the burden on the operator.

The anchor diagnostic device according to the present invention can be used as a device for inspecting and diagnosing the normality / abnormalness and soundness of anchors fixed to concrete structures.

1 lining concrete 2 precast plate 3 anchor bolt (anchor)
4 Mounting nut (exposed part)
10 Rod part 11, 12, 13 Rod component 20 Vibration head part 30 Contact guide part 31 Support plate 32 Contact guide piece 40 Drive part 41 Casing 42 Motor body 43 Rotating shaft 44 Eccentric weight (oscillator)
45 Adjustment weight 46,64 Band 50 Grip part 51 Grip member 60 Power supply part 61 Case 62 Battery 63 Cable 70 Switch S Anchor diagnostic device M Vibration T Tunnel (concrete structure)
W worker

Claims (5)

A pair of contact guide pieces attached to a long rod portion, a vibration head portion attached to the tip of the rod portion, and an exposed portion of an anchor attached to the vibration head portion and fixed to a concrete structure. A contact guide portion provided with a contact guide portion, a drive portion for vibrating the vibrating head portion to continuously hit the exposed portion of the anchor, a grip portion provided at the base end of the rod portion, and a power supply for operating the drive portion. An anchor diagnostic device for concrete structures, characterized in that it comprises a section and a switch. The anchor diagnostic apparatus for a concrete structure according to claim 1, wherein the drive unit includes a vibration motor in which a vibrator is attached to a rotating shaft and vibration is generated by the rotation of the rotating shaft. The anchor diagnostic apparatus for a concrete structure according to claim 1 or 2, wherein the rod portion is expandable and contractible. 1. The driving unit is characterized in that the vibrating head portion and the contact guide portion vibrate at the same time, and the exposed portion of the anchor is continuously beaten by either or both of the vibrating head portion and the contact guide portion. The anchor diagnostic apparatus for a concrete structure according to any one of claims 3. The present invention is characterized in that a tapping sound collecting portion is provided in either the vibration head portion or the contact guide portion, and the tapping sound output portion collected in the sound collecting portion is provided in the grip portion. The anchor diagnostic device for a concrete structure according to any one of 1 to 4.

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