JP2021148500A - Consultation stick - Google Patents

Abstract

To provide a consultation stick capable of performing accurate sounding work without scaffolding even when there are protrusions on the outer wall or when sufficient workspace from the outer wall cannot be ensured.SOLUTION: A consultation stick A includes a sounding ball 200 on the tip of the shaft part 100. The shaft part 100 includes a base end as a telescopic part capable of telescopically receiving the total length of the shaft part 100.SELECTED DRAWING: Figure 1

Description

The present invention relates to a percussion stick.

Conventionally, it is known that a state such as tile or concrete is hit or rolled by a percussion stick, and the presence or absence of a defect is confirmed based on the sound generated by the percussion stick (see, for example, Patent Document 1).

This conventional percussion rod includes an operating culm (shaft portion) that can be expanded and contracted linearly, and a rolling element (ball) provided at the tip of the operating rod.

JP-A-2017-132720

However, the percussion rod described in Patent Document 1 has a length of about 50 to 60 cm, and when checking the adhesive state of tiles on the outer wall of the building, it is necessary to scaffold the upper part of the building. It was a work of assembling.

In addition, if the length of the percussion rod is simply increased and there are protrusions such as bay windows and ventilation hoods on the outer wall of the building, these protrusions will be an obstacle and it will not be possible to consult the part adjacent to the upper side. ..

In addition, in a narrow area where the width between the outer wall and the boundary between the adjacent land is narrow and a sufficient working space cannot be secured, it is necessary to erect the shaft to a state close to vertical if the percussion rod is simply lengthened. However, in this case, the shaft portion becomes an obstacle, it is difficult to visually recognize the ball, and it is difficult to grasp the percussion target.

The percussion rod of the present disclosure focuses on the above-mentioned conventional problems, and while enabling percussion without scaffolding, there is a convex portion on the outer wall and a sufficient working space is provided between the percussion rod and the outer wall. It is an object of the present invention to provide a percussion stick capable of accurate percussion work even if it cannot be secured.

The percussion rod of the present disclosure is a percussion rod having a percussion ball at the tip of the shaft portion, and the shaft portion has a telescopic portion capable of expanding and contracting the entire length of the shaft portion and the shaft portion in an orthogonal direction with respect to the axis. It was a percussion rod provided with a bent portion that was bent in a straight line.

Since the percussion rod of the present disclosure has elastic parts that can be expanded and contracted, it is possible to extend these parts so that the ball can reach a high place on the outer wall without scaffolding or using a ladder or stepladder. can. Further, since it has a bent portion, even if a convex portion such as a bay window or a ventilation hood is present on the outer wall, it is possible to percussion the portion adjacent to the upper side of the convex portion. In addition, even in a narrow area where sufficient work space cannot be secured, the shaft portion above the bent portion can be separated from the outer wall even when the shaft portion below the bent portion is erected at an angle close to the vertical direction. , The visibility of the ball can be ensured.
Therefore, while enabling percussion without scaffolding, a percussion rod that enables accurate percussion work even if there is a protrusion on the outer wall or a sufficient work space cannot be secured between the outer wall and the outer wall. Can be provided.

It is a side view of the minimum shortened state of the percussion rod of the first embodiment. It is a side view of the tip portion of the percussion stick of the first embodiment. It is a side view of the maximum extension state of the percussion stick of the first embodiment. It is a flowchart which shows the flow of the diagnosis work whether or not there is a defect of the tile of the outer wall of a building. It is a side view which shows the state of the percussion work by the percussion stick of Embodiment 1, (a) shows the case where a sufficient space exists in front of an outer wall, and (b) is a narrow space in front of an outer wall. The case of the ground is shown. It is a side view which shows the state of the percussion work by the percussion stick of this Embodiment 1 when the ventilation hood is attached to the outer wall. It is a side view which shows the procedure of the work of attaching a mark tape to a defective tile by the percussion stick of the first embodiment. It is a side view which shows the state which confirms the state of a defective tile by the percussion stick of Embodiment 1. It is a side view which shows the state which removes the defective tile by the 1st modification of the percussion rod of Embodiment 1. FIG. It is a side view which shows the state which takes the image of the defective tile by the 2nd modification of the percussion stick of Embodiment 1. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Overall composition of the roof)
First, the configuration of the percussion rod according to the first embodiment will be described.
As shown in FIG. 1, the percussion rod A of the first embodiment includes a shaft portion 100 and a ball 200. In the following description, in the drawing of the shaft portion 100, the lower side is the base end and the upper side is the tip end, and the ball 200 is provided at the tip end of the shaft portion 100.

The shaft portion 100 includes a base end side portion 110, a bent portion 120, and a tip end side portion 130. The bent portion 120 is formed by bending the axial center of the shaft portion 100 by about 10 to 20 degrees, and is formed at an angle of about θ = 160 to 170 degrees, which corresponds to the inferior angle of the bent portion 120.

The base end side portion 110 is a portion of the shaft portion 100 on the base end side of the bent portion 120, and includes a plurality of pipe materials 111, 112, 113 made of metal (for example, aluminum) or resin, and can be expanded and contracted. Is formed in. That is, the pipe material 111, the pipe material 112, and the pipe material 113 are gradually formed to have a smaller diameter in this order, and are formed so as to be accessible to and from the base end side. Note that FIG. 1 shows a state in which the proximal end side portion 110 and the percussion rod A are most shortened, and the length L1s of the proximal end side portion 110 in the minimum shortened state is formed to a length of about 1780 mm. ..

On the other hand, FIG. 3 shows a state in which the proximal end side portion 110 and the percussion rod A are maximally extended, and the length L1L of the proximal end side portion 110 in the maximum extended state is formed to a length of about 4600 mm. ..

In the base end side portion 110, the pipe material 112 is provided with a lock mechanism (not shown) for restricting the slide with respect to the pipe material 111, and the pipe material 113 is provided with a lock mechanism for restricting the expansion / contraction slide with respect to the pipe material 112. (Not shown) is provided. In addition, this lock mechanism is reduced in diameter by rotating a lock mechanism that engages at the time of maximum extension and a ring-shaped operating member attached to the outer periphery of the pipe members 111 and 112, and the inner pipe member 112. A well-known mechanism such as one that engages with the outer circumference of 113 to regulate the telescopic slide can be used. Alternatively, as a locking mechanism, a screw member that moves in the radial direction by fastening rotation is provided on the outer pipe members 111 and 112, and the screw member is moved in the inner diameter direction and abutted against and fixed to the outer periphery of the pipe members 112 and 113. You may do so. The number of the pipe members 111 to 113 of the base end side portion 110 is not limited to "3", and may be 2, or a plurality of 4 or more.

The tip side portion 130 is a portion of the shaft portion 100 on the tip side of the bent portion 120, and includes a pipe material 131 and a rod member 132 supported by the pipe material 131. A ball 200 is integrally provided at the tip of the rod member 132.

The pipe material 131 is made of a metal such as aluminum or a resin, similarly to the pipe materials 111 to 113 of the base end side portion 110. The pipe material 131 may be continuously integrated with the pipe material 113 of the base end side portion 110, or may be a separate body.

The rod member 132 and the ball 200 are made of a metal such as stainless steel. Further, the rod member 132 is formed so as to be expandable and contractible in a plurality of stages (7 stages in the first embodiment). It should be noted that this expansion / contraction structure is basically the same as the base end side portion 110, and a plurality of pipe materials are provided in a nested manner with a smaller diameter toward the tip end side so that the expansion / contraction structure is possible. The rod member 132 also has a lock mechanism (not shown) that regulates the slide (entrance / exit) of the member on the tip end side with respect to the member on the base end side. Similar to the base end side portion 110, this lock mechanism may also be a mechanism that engages and regulates sliding (entrance / exit) when the member on the tip end side is pulled out (extended) to the maximum, or may be a mechanism on the tip end side. It may be a mechanism for restricting slide (entrance / exit) in an arbitrary drawer (extension) state.

Further, the rod member 132 is detachably provided on the pipe material 131. In this detachable structure, the rod member 132 may be simply inserted into the pipe material 131 and fixed by a frictional force so as to be removable with a force exceeding the frictional force. Further, a screw through which the pipe material 131 is penetrated, or a lock member 133 such as a hole and a pin that can be inserted into the pipe material 131 and the rod member 132 at a predetermined position may be used.

Here, the difference in length due to expansion and contraction of the tip side portion 130 will be described. The length in the minimum shortened state of FIG. 1 is formed to be about L2s = 540 mm. That is, the percussion rod A is formed to have a length of about 2300 mm in the minimum shortened state, and is formed to have a length that can be mounted in a general vehicle.

On the other hand, the tip side portion 130 is formed to have a length of about L2L = 1145 mm at the time of maximum extension shown in FIG. The percussion rod A is formed to have a length of about LAL = 5600 in the maximum extended state. The maximum extension length LAL is set so that the ball 200 reaches the upper end of the outer wall WO (see FIG. 5) on the second floor of the building H.

As described above, the bent portion 120 is formed by bending the intermediate portion of the shaft portion 100, and as described above, the bending angle θ = 160 to 170 degrees. Here, in the case where the pipe material 131 and the pipe material 113 sandwiching the bent portion 120 in the axial direction are integrally continuous, one pipe material can be simply bent and formed. When the pipe material 131 and the pipe material 113 are separate bodies, both may be inclined and fixed, but a rotation axis may be provided to change the bending angle θ of the pipe material 131 with respect to the pipe material 113. good.

Further, at the tip of the pipe member 131 of the tip side 130, a hook member 300 is provided so as to project in the outer diameter direction at a position formed by a dominant angle of the bent portion 120. The hook member 300 is formed of a metal plate or a metal rod, and as shown in FIG. 2, the hook member 300 is formed in a substantially "dogleg" shape by the base portion 301 and the tip portion 302.

Further, in the base portion 301, the angle θfb with respect to the pipe material 131 is tilted to about 160, and the angle θfc formed by the base portion 301 and the tip portion 302 is about a right angle. Therefore, the inclination angle θfa of the tip portion 302 with respect to the pipe material 131 is about 70 degrees.

The length of the base portion 301 is about 30 mm, and the length of the tip portion 302 is about 25 mm. Further, the tip of the tip portion 302 is formed in a thin blade shape.

(Action of Embodiment 1)
Hereinafter, the procedure for diagnosing the defect of the tile T of the outer wall WO of the building H will be described using the percussion rod A of the first embodiment.

<Overall work flow>
First, the work flow from the diagnosis work to the repair work will be described with reference to the flowchart of FIG.

In the first step S1, the defect status of the tile T is determined. This determination is made visually and using the percussion stick A. In this case, the cracking, chipping, and peeling of the tile T are visually determined. Further, an abnormality such as floating of the tile T is determined by percussion with the percussion stick A. Here, the abnormality of the tile T refers to the case where an abnormal sound is generated when the percussion is performed.

If the tile T is peeled off or chipped (step S2) or if the tile T is floating or abnormal (step S3), the process proceeds to step S5 to remove the corresponding tile T.

In step S6, which proceeds after the process of step S5 and when the tile T of step S4 is peeled off, a repair process is performed. In the repair process, the condition of the base is confirmed, the base is optimized according to the condition of the base, and then a new tile T is attached.

<Diagnosis work with a percussion stick>
Next, in the diagnosis work of the presence or absence of a defect of the tile T in step S1, the procedure of the diagnosis work (diagnosis of the presence or absence of floating and abnormal noise) performed by using the percussion rod A will be described.

FIG. 5 shows a normal diagnosis state when the percussion stick A is used. In this case, the length of the percussion rod A is adjusted to the optimum length for the height of the tile T of the outer wall WO to be diagnosed, and then the diagnosis is performed.

The percussion rod A is used when diagnosing a height that requires a stepladder, a ladder, or a scaffold when a conventionally well-known percussion rod of about 50 to 60 cm is used. That is, since the length of the percussion rod A is variable in the range of about 2300 to 5600 mm, the outer wall WO of the second floor of the building H can be percussed without scaffolding or using a ladder or stepladder. Can be done.

At the time of this percussion, as shown in FIG. 5A, the base end side portion 110 of the shaft portion 100 is separated from the outer wall WO (the distance from the outer wall WO is the dimension LA1), and the ball 200 is used. The tile T is hit or rolled, and the sound generated at that time is heard to determine the presence or absence of an abnormality. Specifically, when the tile T is floating, a relatively low sound is generated and a reverberation is generated in the hollow portion, so that a loud sound is generated. Further, the generated sound may be collected by a microphone (not shown), and the presence or absence of an abnormality may be determined by a processing device such as a microcomputer.

FIG. 5B shows the time of diagnosis when the space in the front direction of the outer wall WO is narrow, such as in a narrow area. In this case, the diagnosis is performed with the distance LA2 of the shaft portion 100 from the proximal end side portion 110 being smaller than the state shown in FIG. 5 (a). That is, since the percussion rod A has the bent portion 120, the pipe material 131 and the rod member 132 can be used even when the dimension of the distance LA2 between the base end side portion 110 of the shaft portion 100 and the outer wall WO cannot be sufficiently obtained. The diagnostic work can be performed away from the outer wall WO.

Since the pipe material 131 and the rod member 132 are separated from the outer wall WO in this way, it is easier to confirm which tile T the ball 200 is in contact with, as compared with the case where the shaft portion 100 is linear. , Can perform accurate percussion.

Next, FIG. 6 shows a case where a convex portion such as a ventilation hood VF is present below the tile T to be diagnosed on the outer wall WO. Since the consultation rod A has the tip side portion 130, even if the ventilation hood VF is present, the tile T immediately above the ventilation hood VF can be consulted without climbing on a scaffold or the like.

That is, when the percussion rod is kept straight and only the length is lengthened, in order to percussion the tile T immediately above the ventilation hood VF, the percussion cannot be performed unless it is far away from the outer wall WO, and in a narrow area. Difficult to carry out. Therefore, it is necessary to build a scaffold and climb near the convex part for percussion. On the other hand, since the percussion rod A of the first embodiment has the bent portion 120, the percussion of the tile T immediately above the ventilation hood VF can be performed even when operated from the ground without climbing a ladder or building a scaffold. It can be carried out.

In particular, in the first embodiment, since the rod member 132 can be expanded and contracted, the rod member 132 is extended by the ball 200 so that the shaft portion 100 can be separated from the outer wall WO without interfering with the ventilation hood VF or the like. It can be made available for consultation.

In addition to the ventilation hood VF, the convex parts of the outer wall WO include bay windows, decorative members, various pipes, window frames, etc., and there may be cases where the amount of protrusion from the outer wall WO is larger than that of the ventilation hood VF. be. In such a case, percussion can be performed by extending the rod member 132. Further, even when the tip end side portion 130 is rotatable with respect to the base end side portion 110, even if the protrusion amount of the convex portion is large, it is possible to percussion the tile T immediately above the convex portion.

<Attaching work of marker tape>
Next, the work when an abnormality is found in the tile T will be described with reference to FIG. 7.
If an abnormality is found by percussion, a marker tape MT is attached to the defective tile TF in which this abnormality is found. In this operation, first, as shown in FIG. 7A, the adhesive surface BS of the marking tape MT is directed toward the outer wall WO, and in this state, the upper end of the marking tape MT is folded back and adhered to the ball 200. Next, the ball 200 is brought into contact with the defective tile TF, and the adhesive surface BS of the marker tape MT is adhered to the surface of the defective tile TF. At this time, by pressing the surface of the mark tape MT with the ball 200, the entire surface of the mark tape MT is firmly adhered to the defective tile TF.

Therefore, in the subsequent repair work, the repaired portion can be accurately grasped by using the mark tape MT as a mark.

<Work to check the status of defective tiles>

Next, the work of confirming the state of the defective tile TF will be described.
In this case, as shown in FIG. 8, the direction of the consultation rod A is such that the shaft portion 100 is rotated 90 degrees from the state at the time of consultation shown in FIG. 5 and the like so that the tip of the hook member 300 faces the outer wall WO. Then, the tip of the hook member 300 is engaged with the upper edge of the defective tile TF, and the hook member 300 is moved up and down to confirm the adhesive strength of the defective tile TF. That is, it is confirmed whether or not the defective tile TF is wobbling.

<Removal of defective tiles>
Next, the work for removing the defective tile TF will be described.
When removing the defective tile TF in which wobbling is found, the tip of the hook member 300 is engaged with the defective tile TF and removed from the outer wall WO in the same manner as the operation for checking the state of the defective tile TF described with reference to FIG. Can be done.

Further, here, the percussion rod Ab of the first modification shown in FIG. 9 will be described.
In the percussion rod Ab of the first modification, the hook member 300b is rotatably attached to the pipe material 131 in the circumferential direction around the axis of the pipe material 131, and is arbitrarily provided by a lock member (not shown). It is formed so that it can be fixed at the rotation position of.

Here, as a structure for rotating the hook member 300b with respect to the pipe material 131, an annular member that can rotate in the circumferential direction is provided on the outer periphery of the pipe material 131, and the hook is projected from the annular member in the outer diameter direction. It can be configured by. Further, as the lock member, a pin or a screw penetrating the annular member in the radial direction is fastened in the radial direction, and the pin is inserted into a hole provided in the pipe material 131 to regulate the rotation, or the screw is screwed when the screw is fastened. A structure can be used in which the tip of the pipe member is brought into pressure contact with the outer periphery of the pipe material 131.

Further, a removable collection basket 400 is set on the hook member 300b. As shown in FIG. 9, the collection basket 400 includes a basket portion 410 and a hanging strap member 420 capable of suspending the basket portion 410 from the tip of the pipe material 131.

Therefore, in the work of removing the defective tile TF, the rod member 132 is removed from the pipe material 131 at the tip side portion 130. Then, the hook member 300b is arranged at a position forming an inferior angle of the bent portion 120 in the circumferential direction of the pipe member 131 (a position forming a bending angle θ), and is fixed by a lock member (not shown).

Further, the collection basket 400 is hung on the hook member 300b. In this case, the hanging strap member 420 is hooked on the base end portion of the hook member 300b, and the cage portion 410 is arranged below the hook member 300.

Next, the blade portion at the tip of the hook member 300 is hooked on the upper edge of the defective tile TF and pulled down to peel off the defective tile TF from the outer wall WO and remove it. At this time, the defective tile TF peeled off from the outer wall WO falls, but can be caught by the cage portion 410 arranged below the hook member 300.

Therefore, it is possible to prevent the dropped defective tile TF from falling to the ground, being damaged and scattered, or colliding with other parts of the outer wall WO or a convex portion such as a ventilation hood VF or a bay window to be damaged. Further, since the shaft portion 100 has the bent portion 120, the distance between the shaft portion 100 and the outer wall WO can be secured as compared with the case where the shaft is linear. As a result, the space required for the basket portion 410 to be oriented horizontally can be secured, and thereby, the falling defective tile TF can be received more reliably.

<Shooting work of defective parts>

Next, a case will be described in which a defective portion is photographed on the percussion rod Ac of the second modified example.
As shown in FIG. 10, the percussion rod Ac has a structure in which a camera CA or a portable terminal capable of taking a picture is supported on a rod member (not shown) that can be inserted into the pipe material 131. As the supporting structure, a structure sandwiched between the two members or a well-known structure that attracts by using a magnetic force or the like can be used.

Then, as shown in the figure, the camera CA or the like is made to face the part to be confirmed such as the defective tile TF, and the defective part such as the defective tile TF is photographed at a close distance by using the remote control function or the timer function. You can check the location in detail.

(Action and effect of the embodiment)
The action and effect of the percussion stick of the embodiment will be described below.
(1) The percussion rod A of the first embodiment is a percussion rod having a percussion ball 200 at the tip of the shaft portion 100, and the shaft portion 100 is a telescopic portion capable of expanding and contracting the entire length of the shaft portion 100. The base end side portion 110 and the tip end side portion 130, and the bent portion 120 in which the shaft portion 100 is bent in the direction orthogonal to the axis are provided.

Therefore, since the base end side portion 110 and the tip end side portion 130 that can be expanded and contracted are provided, by extending these, the ball 200 reaches a high place of the outer wall WO without forming a scaffold or using a ladder or a stepladder. Can be done. On the other hand, by shortening the base end side portion 110 and the tip end side portion 130, the shaft portion 100 can always be easily carried as compared with a long one.

Further, the outer wall WO may be provided with a convex portion such as a bay window or a ventilation hood VF, but since it has a bent portion 120, it is possible to perform percussion while avoiding the convex portion. Moreover, even if the front side of the outer wall WO is a narrow space, accurate percussion can be performed while being visually recognized.

(2) The percussion rod A of the first embodiment is a position on the tip side of the shaft portion 100 with respect to the 120 bent portion, and the hook member 300 is located at a position on the dominant angle side of the bent portion 120 in a direction intersecting the axial center. Is protruding.
Therefore, the hook member 300 can be hooked on the defective tile TF to check the wobbling condition, and the defective tile TF can be peeled off from the base of the outer wall WO.

(3) In the percussion rod A of the first embodiment, a rod member 132 in which a ball 200 is integrally provided is formed so as to be detachable from the shaft portion 100.
Therefore, when the ball 200 becomes an obstacle during the work using the hook member 300, the rod member 132 can be removed, which is excellent in workability.

(4) In the percussion rod A of the first embodiment, the shaft portion 100 has a length set for the purpose of reaching the upper end of the outer wall WO of the second floor of the building H to be diagnosed in the extended state. Specifically, it has a length longer than 5000 mm.
Therefore, the tile T of the outer wall WO of the two-story building H can be percussed without forming a scaffold.

(5) The percussion rod Ab of the first modification of the embodiment is a lock in which the hook member 300b is rotatably attached to the pipe material 131 in the circumferential direction and the hook member 300b can be fixed at an arbitrary rotational position. It is equipped with a member.

Therefore, when checking the state of the defective tile TF or removing the defective tile TF, the hook member 300b can be arranged at an optimum position with respect to the pipe material 131.

(6) The percussion rod Ab of the first modification of the embodiment includes a collection basket 400 that can be hung from a hook member 300b at the tip of the pipe material 131 with the ball 200 removed.
Therefore, the defective tile TF removed from the outer wall WO by using the hook member 300b can be received by the collection basket 400. As a result, the defective tile TF does not fall to the ground, and it is possible to prevent the defective tile TF from damaging the outer wall WO or the convex portion or hitting the operator due to the fall of the defective tile TF.
In addition, when the hook member 300b is made rotatable on the pipe member 131, as shown in FIG. 9, by arranging the hook member 300b on the inferior angle side of the bent portion 120, the collection basket 400 is placed below the shaft portion 100. It is possible to secure a large space for arranging the pipes, which is excellent in usability.

Although the details have been described above with reference to the drawings based on the embodiment of the present invention, the specific configuration of the consultation rod of the present disclosure is not limited to that shown in the embodiment of the present invention. Design changes that do not deviate from the gist of the present invention are included in the present invention.

For example, in the embodiment, an example is shown in which both the base end side portion 110 and the tip end side portion 130 sandwiching the bent portion 120 of the shaft portion 100 can be expanded and contracted, but only one of them can be expanded and contracted. It may be possible. Further, although the rod member 132 can be expanded and contracted when the tip side portion 130 can be expanded and contracted, the pipe material 131 may be expanded and contracted.

Further, in the embodiment, the length of the percussion rod is set to 5000 mm or more at the time of maximum extension, but the length is not limited to this, and may be shorter than 5000 mm. For example, in the case of a percussion rod for a one-story building, the length may be about 2000 mm at the maximum extension. In this case as well, if the bent portion is provided, it is possible to avoid the bay window, the eaves, the ventilation hood, and the like for percussion. Further, in the embodiment, the tile T is shown as the percussion target, but the tile T is not limited to the percussion target, and if the percussion target is required, it is also used for the percussion of mortar or other materials. Can be done.

100 Shaft part 110 Base end side part (expansion and contraction part)
120 Bent part 130 Tip side (expandable part)
200 Balls 300 Hook member 300b Hook member 400 Recovery basket A (1st embodiment) Consultation rod Ab (1st modification) Consultation rod Ac (2nd modification) Consultation rod T Tile TF Defective tile VF Ventilation Hood WO outer wall

Claims (5)

A percussion rod with a percussion ball at the tip of the shaft.
The shaft portion is a percussion rod including a telescopic portion that allows the entire length of the shaft portion to be expanded and contracted, and a bent portion in which the shaft portion is bent in a direction orthogonal to the axis. In the percussion stick according to claim 1,
A percussion rod having a hook member protruding in a direction intersecting the axial center at a position on the tip side of the shaft portion with respect to the bent portion and at a position on the dominant angle side of the bent portion. In the percussion stick according to claim 1 or 2.
A percussion rod in which a portion including the jade is detachably formed with respect to the shaft portion. In the percussion stick according to claim 3,
A percussion rod provided with a collection basket that can be hung at the tip of the shaft portion with the ball removed. In the percussion stick according to any one of claims 1 to 4.
The shaft portion is a percussion rod having a length set for the purpose of reaching the upper end of the outer wall of the second floor of the building to be diagnosed in the extended state.

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