JP2007031974A - Anchoring bolt protector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anchor bolt protector which facilitates length adjustment thereof in the field, is proof against leakage of mortar from a lower surface thereof, and facilitates drawing of an anchor bolt from the mortar for reuse of the same. <P>SOLUTION: The anchor bolt protector is for use when a cover bearing frame 13 is fixed onto a side cluster 12 via the anchor bolt 14 and a height adjusting nut 3, and fitted onto the anchor bolt 14 located between the height adjusting nut 3 and the side cluster 12. The protector is formed of protector main bodies 1 which are arranged like bellows and terminated by ridge portions of the uppermost and lowermost main bodies, and pairs of upper and lower projections 2 which are formed on circumferential external surface of each ridge portion of the protector main body 1 except for the uppermost and lowermost ridge portions. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides an anchor bolt protector, in particular, when, for example, a receiving frame into which an iron lid of a manhole is fitted is fixed on a side lump constructed in the ground by an anchor bolt, the anchor bolt is fixed to the receiving frame and the side lump. It is related with the protector for protecting from the mortar filled between.

  Conventionally, for example, as shown in FIG. 8, an iron lid 11 that closes a manhole (H) is fitted in a receiving frame 13 on a side lump 12 built in the ground so as to be freely opened and closed. And the receiving frame 13 was being fixed by the anchor bolt 14 with which the lower part was embedded in the side lump 12, and the nut 15 screwed in this so that rattling may not arise by the impact received by a vehicle etc.

  When fixing the receiving frame 13 as described above, the height of the receiving frame 13 may need to be adjusted in order to match the receiving frame 13 and the road surface level.

  Patent Document 1 (Japanese Patent No. 3136514) discloses a receiving frame fastening fixture as described below as means for fixing the receiving frame 13 on the side block 12 capable of adjusting the height of the receiving frame 13. . Hereinafter, a fastening fixture capable of adjusting the height of the receiving frame is referred to as a prior art, and will be described with reference to the drawings.

  9 is a partial cross-sectional view showing a fixing state of a receiving frame according to the prior art, FIG. 10 is a view showing a conventional fixing ring, and FIG. 9 (a) is a partial cross-sectional view showing a conventional fixing ring, FIG. 11 (b) is a plan view showing a conventional fixing ring, FIG. 11 is a view showing a conventional anti-rotation cap, and FIG. 11 (a) is a plan view showing the anti-rotation cap. (B) is a fragmentary sectional view showing a rotation prevention cap.

  As shown in FIGS. 9 to 11, the prior art is screwed into the fixing ring 16, the anti-rotation cap 17 fitted outside the fixing ring 16, the nut 18 fitted in the anti-rotation cap 17, and the anchor bolt 14. The height adjustment tool 19, the protection block 20 that protects the height adjustment tool 19 from mortar, and the bellows-shaped protection tool 21 that protects the anchor bolt 14 from mortar.

  The fixing ring 16 has a protrusion 16a provided on the lower surface, a washer 16b, and external teeth 16c. The rotation prevention cap 17 has a hexagonal opening 17 a into which the hexagon nut 18 is fitted, a claw 17 b that grips the fixing ring 16, and an inner tooth 17 c that meshes with the outer teeth 16 b of the fixing ring 16. The height adjuster 19 is screwed into the anchor bolt 14 between the side lump 12 and the receiving frame 13 so as to be manually rotatable. The protective block 20 and the protective device 21 prevent the mortar filled between the side block 12 and the receiving frame 13 from contacting the height adjusting device 19 and the anchor bolt 14 after adjusting the height of the receiving frame 13. , Allowing these to be reused.

  According to the above prior art, after adjusting the height of the receiving frame 13 by rotating the height adjuster 19 screwed into the anchor bolt 14 with the lower part embedded in the side lump 12 until it reaches a predetermined height position, The receiving frame 13 is fixed as follows.

  The fixing ring 16 is inserted from the upper end of the anchor bolt 14, and the protrusion 16 a is fitted into the long hole 13 a of the receiving frame 13. Next, the nut 18 is screwed into the anchor bolt 14, and the fixing ring 16 is pressed against the receiving frame 13 via the washer 16 b integrated with the fixing ring 16 to fix the receiving frame 13. Next, the rotation prevention cap 17 is inserted into the anchor bolt 14, and the nut 18 is fitted into the opening 17 a, and the outer teeth 16 c of the fixing ring 16 and the inner teeth 17 c of the fixing ring 16 are engaged with each other. As a result, even if a rotational force in the loosening direction acts on the nut 18, this rotational force is transmitted to the fixing ring 16 via the anti-rotation cap 17, but the protrusion 16 a of the fixing ring 16 enters the elongated hole 13 a of the receiving frame 13. Since it has entered, the nut 18 does not rotate, and the nut 18 is prevented from loosening.

  And the mortar is filled between the side lump 12 and the receiving frame 13, and the fixing of the receiving frame 13 is completed. Even if the mortar is filled, the height adjusting tool 19 and the anchor bolt 14 are protected by the protection block 20 and the protection tool 21, respectively, so that the mortar does not adhere and can be reused.

  As shown in FIG. 9, if the cap 23 is put on the anti-rotation cap 17, the anti-rotation cap 17 and the nut 18 are protected from the asphalt laid after the completion of fixing, so that these can be reused. Become.

Japanese Patent No. 3136514

  According to the prior art, since the anchor bolt 14 is covered with the protector 21, the anchor bolt 14 can be reused, but there are the following problems.

  (1) The length of the anchor bolt in contact with the mortar, that is, the length of the anchor bolt between the height adjuster 19 and the side block 12 varies depending on the adjustment height of the receiving frame 13. Since the protective device 21 has a bellows shape, the adjustment is effective to some extent as the length of the anchor bolt in contact with the mortar is shortened, but the adjustment is not effective when the length is longer. Therefore, the protective device 21 is made long in advance, and is cut into lengths as necessary. This cutting operation is performed using a blade at the construction site, and the cutting position is preferably the peak portion of the protective device 21 in consideration of the close contact with the side lump 12, and it is necessary to accurately cut in a straight line. There is. However, cutting in this way takes time and effort.

  (2) Since the lower surface of the protector 21 is merely on the upper surface of the side lump 12, the mortar may enter from the gap between the lower surface of the protector 21 and the upper surface of the side lump 12.

  (3) Since all the protective equipments 21 have the same diameter, the protective equipment 21 cannot be smoothly pulled out from the mortar when the anchor bolt 14 is reused.

  Therefore, the object of the present invention is to easily adjust the length of the protective equipment at the construction site, to reduce the risk of mortar penetration from the lower surface of the protective equipment, and from the mortar when the anchor bolt is reused. An object of the present invention is to provide an anchor bolt protector that can be easily pulled out.

  The present invention has been made to achieve the above object, and is characterized by the following.

  According to the first aspect of the present invention, when the lid receiving frame is fixed on the side block via the anchor bolt and the height adjuster, the cover bolt is put on the anchor bolt between the height adjuster and the side block. A protector body that is formed in a bellows shape and whose upper and lower ends end at a peak, and a pair of upper and lower parts formed on the outer circumferential surface of each peak except for the upper and lower ends of the protector body It is characterized by comprising ridges.

  The invention described in claim 2 is characterized in that the invention described in claim 1 is characterized in that the protective device main body and the protrusion are integrally formed.

  The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, the lower end portion of the protective device main body is formed in a double manner.

  The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the protective device main body is reduced in diameter toward the lower side.

  The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the protective device main body is made of a flexible material.

  According to this invention, the length of the protective equipment can be easily adjusted at the construction site, there is little risk of mortar entering from the lower surface of the protective equipment, and the anchor bolt can be pulled out from the mortar when reused. Easy to do.

  Next, an embodiment of the anchor bolt protector of the present invention will be described with reference to the drawings.

  1 is a sectional view showing an anchor bolt protector according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a partially enlarged front view showing an anchor bolt protector according to the present invention, and FIG. Sectional drawing which shows the state which fitted the anchor bolt protective device of this invention to the anchor bolt, and fixed the receiving frame to the side lump, FIG. 5 is the A arrow view of FIG. 4, FIG. Sectional drawing which shows the state which fitted the anchor bolt protective device of this invention cut | disconnected to the anchor bolt and fixed the receiving frame to the side lump, FIG. 7 is A arrow directional view of FIG.

  As shown in FIG. 1 to FIG. 7, the anchor bolt protector of the present invention is formed in a bellows shape, and excludes the protector body 1 and the upper and lower ends of the protector body 1 whose upper and lower ends end at the peak. It consists of a pair of upper and lower ridges 2 formed integrally with the protector body 1 on the outer circumferential surface of each mountain portion, and is made of a flexible material such as rubber.

  Since the protector body 1 is formed with a pair of upper and lower ridges 2, the protector body 1 can be easily cut from between the ridges 2 by hand or a blade. Since the protrusion 2 is formed in the peak part of the protective device main body 1, the cut surface is always a peak part. When the protective device body 1 is cut halfway, its lower surface is not formed double as will be described later. However, since it is cut at the peak, it easily adheres to the upper surface of the side lump 12 and the mortar enters. Hateful.

  As shown in FIG. 2, since the lower end portion of the protector main body 1 is doubled, it is possible to reliably prevent mortar from entering from the gap between the lower surface of the protector main body 1 and the upper surface of the side lump 12. Can do. Furthermore, since the protective device main body 1 is reduced in diameter downward, the anchor bolt 14 can be easily pulled out from the mortar.

  In order to fix the receiving frame to the side block by fitting the above-described anchor bolt protector of the present invention into the anchor bolt, as shown in FIGS. 4 and 5, the protector body 1 is fitted into the anchor bolt 14. After adjusting the height of the receiving frame 13 with the height adjusting nut 3, the fixing nut 4 is screwed into the anchor bolt 14 protruding from the elongated hole 13 a of the receiving frame 13. Then, the mortar 22 is filled between the receiving frame 13 and the side block 12.

  When the distance between the height adjusting nut 3 and the side block 12 is short, the length of the protector main body 1 also needs to be shortened. In this case, as shown in FIGS. The lower part of the main body 1 is cut. Since this cutting can be performed between the protrusions 2 formed on the protective device main body 1, it can be easily performed by tearing by hand or cutting with a scissors or the like. In addition, the cut surface at the lower end of the protective device main body 1 is a crest and is in a straight line, so that the adhesion with the side block 12 is good and the intrusion of the mortar 22 can be prevented.

  In any case, since the periphery of the anchor bolt 14 is covered with the protector main body 1, the mortar 22 does not adhere to the anchor bolt 14. Accordingly, the anchor bolt 14 can be easily reused after the receiving frame 13 is removed from the side block 12.

  As described above, according to the anchor bolt protector of the present invention, by forming a pair of protrusions on the mountain portion, the protector main body can be easily cut from between the protrusions. Adjustment can be easily done at the construction site. Moreover, by forming the ridges on the ridges, the cut surface is straight and becomes ridges, so that the adhesiveness with the side chunks is excellent. Therefore, there is little risk of mortar entering from the lower surface of the protective equipment. Furthermore, by reducing the diameter of the protector body downward, the protector body can be easily pulled out of the mortar when the anchor bolt is reused.

It is a top view which shows the protector for anchor bolts of this invention. It is the elements on larger scale of FIG. It is a partial expanded front view which shows the protector for anchor bolts of this invention. It is sectional drawing which shows the state which fitted the protector for anchor bolts of this invention in the anchor bolt, and fixed the receiving frame to the side lump. It is A arrow directional view of FIG. It is sectional drawing which shows the state which fitted the protector for anchor bolts of this invention which adjusted length to the anchor bolt, and fixed the receiving frame to the side block. It is A arrow directional view of FIG. It is a schematic sectional drawing which shows the receiving frame fixed on the side lump. It is a fragmentary sectional view which shows the fixed state of the receiving frame by a prior art. It is a figure which shows the fixing ring of a prior art, The figure (a) is a fragmentary sectional view which shows a fixing ring, The figure (b) is a top view which shows a fixing ring. It is a figure which shows the rotation prevention cap of a prior art, The figure (a) is a top view which shows a rotation prevention cap, The figure (b) is a fragmentary sectional view which shows a rotation prevention cap.

Explanation of symbols

1: Protective equipment body 2: Protrusion 3: Height adjusting nut 4: Fixing nut 11: Iron lid 12: Side block 13: Receiving frame 13a: Long hole 14: Anchor bolt 15: Nut 16: Fixing ring 16a: Protrusion 16b : Washer 16c: External tooth 17: Anti-rotation cap 17a: Opening 17b: Claw 17c: Internal tooth 18: Nut 19: Height adjustment tool 20: Protection block 21: Protection tool 22: Mortar 23: Cap

Claims (5)

When the lid receiving frame is fixed on the side chunk via the anchor bolt and the height adjuster, the protector is put on the anchor bolt between the height adjuster and the side chunk,
It is formed of a bellows shape, and includes a protector main body whose upper and lower ends end at a peak, and a pair of upper and lower protrusions formed on the outer circumferential surface of each peak except for the upper and lower ends of the protector main body. Features anchor bolt protector.   2. The anchor bolt protector according to claim 1, wherein the protector body and the protrusion are integrally formed.   The anchor bolt protector according to claim 1 or 2, wherein the lower end portion of the protector body is formed to be double.   The protector for an anchor bolt according to any one of claims 1 to 3, wherein the diameter of the protector main body is reduced in a downward direction.   The said protector main body consists of a flexible material, The anchor bolt protector as described in any one of Claim 1 to 4 characterized by the above-mentioned.

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