JP5348420B2 - Anchor driving tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anchor driving tool capable of driving an anchor without rotating a high nut even in the case of using a rotary impact type electric tool when driving an anchor, in which a so-called high nut longer than a normal one is installed, into a prepared hole previously machined in a ceiling and a wall. <P>SOLUTION: This anchor driving device for solving the described problem includes: a rotary impact bar installed in a rotary impact type electric tool to receive rotation and an impact; a hollow member provided with an installation part, in which an anchor is to be installed, and a rotation regulating member for regulating rotation. After inserting the rotary impact bar into the hollow member, the anchor is installed in the anchor installation part provided in the tip of the hollow member, and the anchor can be driven into a prepared hole provided in the ceiling or the like by the hitting force of the electric tool. With such structure, the driving work is efficient. Since transmission of rotation of the electric tool to the anchor is prevented by the rotation regulating member, after driving is concluded, stable drawing proof stress can be secured by fixing the anchor by rotating the high nut installed in the anchor. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an anchor driving tool for driving an anchor into a prepared hole drilled in a ceiling or wall made of concrete or the like.

  When suspending a lighting fixture or decorative panel on a building made of concrete, for example, on a ceiling, first drill a pilot hole of a predetermined diameter and depth in the concrete with a drilling power tool, and drive an anchor into this hole. In general, a method of connecting a connecting rod to an anchor and attaching a lighting fixture or a decorative board to the tip end side of the connecting rod is generally adopted.

  When drilling a pilot hole in the ceiling for mounting and fixing anchors, for example, prepare a work platform, and an operator with a drilling power tool will be placed on the platform to perform drilling work, and drill holes at necessary locations. When finished, drive in the anchor and fix it.

  As an anchor used for this purpose, it is commonly called a high nut, a long nut, etc. A suspension with a nut and washer that is about 5 times longer than a normal nut. There is an anchor for. When driving this anchor into the pilot hole, the operator must hold the anchor with his left hand, lightly press the tip of the anchor against the pilot hole, and use the right hand hammer until the washer on the top end of the high nut touches the ceiling. Strike the lower end face.

Thereafter, the high nut is tightened with a torque wrench or the like until a predetermined torque is generated, the anchor expansion member is expanded in the pilot hole to fix the anchor, and the anchor pull-out resistance is ensured.
Finally, a connecting rod for hanging the member is screw-connected to the high nut portion of the anchor, and a hanging member such as a decorative plate for ceiling is attached to the other side of the connecting rod.

  However, when the anchor is driven using a hammer, the workability is poor because it must be driven in an unreasonable posture toward the ceiling. Also, if the corner of the high nut end surface is hit with a hammer, the threaded portion of the high nut temporarily attached to the anchor body may be deformed, and the high nut may be rotated with a torque wrench after driving the anchor. In the end, the expansion member provided on the anchor cannot be sufficiently expanded, and a predetermined anchor pull-out strength cannot be ensured.

  Although it is possible to use an impact-type electric tool instead of a hammer to drive the anchor, generally there are few electric tools that can perform only the impact in electric tools that are widely used. In other words, the power tool is mainly used for rotation and is rarely used alone for striking. Therefore, when a hit is required, in many cases, a rotary / blow-type electric tool having a function of rotating and hitting at the same time is used. When the anchor is driven with this rotary / blow-type power tool, the operator's fatigue is reduced compared to when driving with a hammer, but the high nut attached to the anchor body rotates due to the rotation action and vibration of the hammer. The position of the high nut in the axial direction changes.

  To secure the anchor pull-out strength, the anchor is driven into the pilot hole and then the high nut is tightened with a torque wrench to expand the expansion member. However, if the position of the high nut in the anchor axis direction deviates from the specified position, As a result, there is a variation in the amount of tightening of the high nut after the anchor driving, and as a result, there arises a problem that a predetermined anchor pull-out strength cannot be ensured. Sometimes, when trying to expand the expansion member by rotating the high nut with a torque wrench, the anchor may have come out of the pilot hole before reaching the predetermined torque.

  As described above, when the anchor is driven into the pilot hole drilled in the ceiling or the like, the method of driving using the hammer must be driven upward, and the operator must work in an unnatural posture. Therefore, fatigue is severe and efficiency is poor. In addition, when hitting the end face of the high nut, there is a problem that the corner of the high nut is hit, not the center portion, causing the thread deformation of the high nut.

  On the other hand, in order to increase working efficiency, a method of hitting the end face of a high nut and driving an anchor using a rotary / blow-type electric tool widely used at construction sites and the like is also possible. In this case, the high nut rotates due to vibration or rotational force generated by the hammering or rotation of the power tool, the axial position that has been mounted in advance changes, and the anchor driving depth that is driven into the pilot hole is predetermined. May deviate from depth. Then, after driving, it becomes impossible to secure the appropriate pullout strength of the anchor by tightening the high nut. Eventually, after pulling out the anchor, the pilot hole is drilled in another place and the anchor is driven There was a problem such as having to.

  The object of the present invention is to provide an anchor driving tool that solves such drawbacks.

  An anchor driving tool according to the present invention for solving the above-described problems includes a hollow member, an anchor mounting portion provided on a distal end side of the hollow member, a rotation restricting member provided on a rear end side of the hollow member, It is comprised from the rotation hitting stick with which a tool is mounted | worn, It is characterized by the above-mentioned.

  In order to perform driving, first, the rotary hitting rod is mounted on the electric tool. Next, the hollow member is inserted into the rotary striking rod, and the rotation restricting member is brought into contact with the grip of the electric tool to restrict the rotation of the hollow member. After that, attach the anchor to the anchor attachment part at the tip of the hollow member, hold the power tool with both hands, keep the anchor driving tool vertical toward the pilot hole provided on the ceiling, and lower the tip of the anchor Abuts the hole.

  In this state, the power supply of the electric tool is activated. Then, the rotary hitting rod held by the electric tool starts hitting operation simultaneously with the rotation. At this time, even if the rotary striking rod is rotated by the rotating function of the electric tool, the entire hollow member does not rotate because the rotation restricting member is in contact with the grip of the electric tool. Therefore, the striking force of the power tool propagates from the tip of the rotary striking rod to the anchor mounting portion, and the anchor is driven into the pilot hole without rotating.

When the driving proceeds and the washer attached to the anchor comes into contact with the ceiling surface, the power of the electric tool is turned off and the anchor driving tool is removed from the anchor.
Thereafter, the high nut is rotated with a torque wrench or the like until a predetermined torque is reached, and the expansion member provided in the anchor body is expanded inside the pilot hole to ensure the necessary anchor pulling strength. Finally, a connecting rod or the like is attached to a high nut fixed to the anchor body, and a lighting fixture or a decorative board is attached to the tip.

  According to the anchor driving tool according to the present invention, since the driving is performed using the electric tool, not only the burden on the operator is reduced, but also the operation of attaching the anchor to the pilot hole at a high place such as the ceiling. It can be done easily. In addition, even when using a generally used rotary / striking electric tool, the rotation restricting member can restrict the rotation of the electric tool from being transmitted to the cylindrical member. The anchor is driven into the pilot hole only after being hit.

  In other words, the high nut that is temporarily attached to the anchor body with a screw does not rotate even if it is driven with a rotary / blow-type power tool, and the driving proceeds while securing the initial axial position. If the high nut is tightened with a torque wrench or the like to expand the expansion member of the anchor body, it is possible to stably and appropriately secure the anchor pulling strength.

Overall view of anchor driving tool in one embodiment of the present invention Overall view of one anchor driven by the anchor driving tool of the present invention The figure which shows the state which mounted | wore the anchor mounting part in one Example of this invention. The figure explaining the operation | work which drives an anchor into the pilot hole of a ceiling using the anchor driving tool of this invention The figure explaining one anchor mounting part of this invention Sectional drawing in one anchor mounting part of this invention.

    When using an anchor driving tool according to the present invention to drive an anchor into a pilot hole previously drilled in the ceiling of a building constructed of concrete, first, attach the rotating striking rod to the electric tool and use the chuck of the electric tool. Fix it. Next, the hollow member is inserted into the rotary striking rod, and the tip of the rotation restricting member fixed to the rear end of the hollow member is brought into contact with the grip of the electric tool. Then, the rotation of the hollow member in a specific direction is restricted.

  Next, the anchor is mounted on the anchor mounting portion at the tip of the hollow member, the electric tool is held with both hands, and the anchor tip is brought into contact with the entrance of the pilot hole while maintaining the entire anchor driving tool vertically.

  In this state, if the power of the power tool is activated while applying force to press the anchor against the pilot hole, the rotary striking rod attached to the power tool starts striking simultaneously with the rotation and drives the anchor into the pilot hole. start. When the washer attached to the anchor is driven to the point where it comes into contact with the ceiling surface, the power is turned off to complete the driving. Thereafter, the anchor driving tool is removed from the anchor, and the high nut is rotated with a torque wrench or the like, and the expansion member of the anchor body is expanded to ensure the necessary anchor pulling strength.

  As described above, according to the anchor driving tool of the present invention, driving can be performed without changing the axial position of the high nut temporarily mounted on the anchor body even when using a rotary / striking electric tool. Since this can be performed, a predetermined anchor pull-out strength can be secured stably. In addition, since the electric tool is used, the burden on the operator is reduced, and not only a large number of anchors can be driven in a short time, but also it is possible to easily drive into a slightly separated place such as the ceiling.

  The anchor driving tool according to the present invention will be described with reference to FIGS. 1, 2, 3, 4, 5, and 6.

  FIG. 2 shows an example of the anchor 10 used by being driven into a pilot hole such as a ceiling using the anchor driving tool according to the present invention. The tip 12 of the anchor body 11 has a rounded shape so that it can be easily inserted into a pilot hole 19 drilled in concrete or the like. Further, an expansion member 14 is attached near the anchor body tip 12.

  On the other hand, a washer 15 and a high nut 16 are mounted on the anchor body rear end 13 side. The high nut 16 is about five times as long as a normal nut. This is to fix the anchor main body 11 on one side and a connecting rod (not shown) on the opposite side by screws after driving.

  In order to rotate the high nut with a torque wrench after driving and secure an appropriate anchor pulling strength, the mounting position of the high nut 16 on the anchor body 11 after driving is important. It is desirable that the end 13 is screwed to about ¼ of the total length of the high nut 16. Therefore, before driving the anchor into the pilot hole, it is necessary to temporarily mount the relative position of the high nut 16 and the anchor main body 11 to an appropriate value and visually check this, and then drive it into the pilot hole while maintaining this state. become.

  FIG. 1 shows an entire anchor driving tool 1 according to the present invention. The rotary striking rod 2 is mounted in the center hole of the hollow member 4, and the rotary striking rod tip 3 abuts from the inside of the hole to the rod-shaped anchor mounting portion 5 a fixed to the tip of the hollow member 4. The rear end 9 of the rotary hitting bar is provided with a groove 9a for mounting and fixing the rotary hitting bar 2 on the chuck 24 of the electric tool 21, so that the rotational force and hitting force are stably transmitted to the rotary hitting bar 2. It has become. A rotation regulating member 7 is fixedly attached to the rear end portion 6 of the hollow member 4 with a screw or the like.

FIG. 4 shows an operation of driving the anchor 10 into the prepared hole 19 of the ceiling 18 by using the anchor driving tool 1 according to the present invention.
In the driving operation, the operator 20 holds the handle 22 of the electric tool 21 with the right hand and the grip 23 with the left hand, and the anchor 10 at the tip of the anchor driving tool 1 fixedly attached to the chuck 24 of the electric tool 21 is attached to the ceiling 18. It is driven into the pilot hole 19 perforated.
At this time, if the tip 8 of the rotation restricting member 7 fixed to the anchor driving tool 1 is brought into contact with the grip 23 of the electric tool 21, the rotation of the hollow member 4 can be restricted.

  FIG. 3 shows a state where the anchor 10 is mounted on the rod-shaped anchor mounting portion 5 a at the tip of the hollow member 4. Since the rod-shaped anchor mounting portion 5a is inserted into the screw hole of the high nut 16, the anchor 10 can be kept temporarily mounted on the rod-shaped anchor mounting portion if the whole is kept substantially vertical. it can.

An anchor driving procedure using an anchor driving tool according to an embodiment of the present invention will be described with reference to the above drawings.
First, as shown in FIG. 2, the washer 15 and the high nut 16 are attached to the anchor main body 11 of the anchor 10 before starting driving. At this time, the high nut 16 is mounted so that the anchor body rear end 13 is in a predetermined position, for example, a position that is 1/4 of the total length of the high nut 16 from the washer 15 side of the high nut 16.

  Next, the anchor driving tool 1 is mounted on the electric tool 21. First, the rotary hitting rod rear end 9 is mounted on the chuck 24 of the electric tool 21, and is firmly fixed to the electric tool 21 using the groove 9 a of the rotary hitting rod 2.

  Thereafter, the rotary striking rod 2 mounted on the electric tool 21 is inserted into the hollow member 4 until the rotary striking rod tip 3 comes into contact with the inside of the rod-shaped anchor mounting portion 5 a of the hollow member 4. Next, the hollow member 4 is manually rotated around the rotary striking rod 2, and the front end 8 of the rotation restricting member 7 fixed to the rear end 6 of the hollow member is brought into contact with the grip 23 of the electric tool 21. .

  After the anchor driving tool 1 is mounted on the electric tool 21 in this way, the anchor 10 with the high nut 16 already mounted at an appropriate position is connected to the rod-shaped anchor mounting portion 5a at the tip of the hollow member 4 as shown in FIG. Attach to. After that, while supporting the electric tool 21 with both hands, the anchor driving tool 1 is set up vertically, and the anchor body tip 12 of the anchor 10 attached to the tip of the anchor driving tool is a pilot hole previously drilled in the ceiling 18. The power tool is operated while pushing the anchor 10 toward the ceiling.

  Then, the rotary hitting rod 2 connected to the electric tool 21 starts rotating and hitting operations. At this time, since the rotation of the hollow member 4 is restricted by the rotation restricting member 7, only the striking force is propagated to the hollow member 4 from the tip of the rotary striking rod 3, and the rod shape provided at the tip of the hollow member 4. The rear end 17 of the high nut 16 of the anchor 1 mounted on the anchor mounting portion 5a is hit by the rod-shaped anchor mounting portion 5a, and the tip 12 of the anchor main body 11 to which the high nut 16 is mounted is the pilot hole 19 of the ceiling 18. It is driven into. When driving is advanced and the washer 15 attached to the anchor 10 comes into contact with the ceiling, the power of the electric tool is turned off, and the anchor driving tool is removed from the anchor.

  Thereafter, when the high nut 16 is tightened with a separately prepared torque wrench or the like and a force is applied in the direction of pulling out the anchor main body 11, the expansion member 14 attached to the anchor main body 11 expands in the pilot hole 19. However, the anchor pull-out strength is generated by biting into the side of the concrete. After completing the setting of anchor anchoring and anchor pull-out strength in this way, if a connecting rod prepared separately is screwed to a high nut, the connecting rod can be used to attach lighting fixtures and decorative plates from the ceiling. It can be suspended.

  In addition, the place to be struck differs depending on the length of the cylindrical portion inserted into the high nut of the rod-shaped anchor mounting portion 5a. When the cylindrical portion is long, the rear end 13 of the anchor main body 11 is hit. When the middle portion of the circle is short, the rear end 17 of the high nut 16 is hit. In either case, the anchor 10 does not rotate and the necessary striking force is transmitted, and there is no problem.

  As for the anchor mounting portion at the tip of the hollow member 4, instead of using the rod-shaped anchor mounting portion 5a shown in FIG. 1 and FIG. 3, the cylindrical anchor mounting portion shown in FIG. 5b may be used. In this case, unlike the case where the rod-shaped anchor mounting portion 5a is used, it is not necessary to insert a rod into the screw portion of the high nut 16, and the risk of causing unnecessary screw deformation during the driving operation can be reduced.

  Further, it is substantially the same as the cylindrical anchor mounting portion 5b shown in FIG. 5, but as shown in a cross-sectional view in FIG. 6, a hexagonal anchor mounting portion 5c having a hexagonal hole shape is used. Also good. In this case, since the rotation of the high nut 16 of the anchor mounted in the hole is restricted by the inner wall surface of the hole of the hexagonal anchor mounting portion 5c, the nut higher than the case where the cylindrical anchor mounting portion 5b is used. The risk of rotation of 16 due to vibration or the like is reduced.

  In the above description, the method of driving an anchor attached with a high nut into a pilot hole drilled mainly in the ceiling has been described. However, the anchor driving tool according to the present invention can be used even when the anchor is driven into a horizontally drilled prepared hole on the vertical wall surface. The driving operation can be performed using the electric power tool, which is particularly effective when a large number of anchors must be driven.

DESCRIPTION OF SYMBOLS 1 Anchor driving tool 2 Rotating impact rod 3 Rotating impact rod tip 4 Hollow member 5a Rod anchor mounting portion 5b Cylindrical anchor mounting portion 5c Hexagonal anchor mounting portion 6 Hollow member rear end portion 7 Rotation restricting member 8 Rotation restricting member tip portion 9 Rotating impact rod rear end 9a Groove 10 Anchor 11 Anchor body 12 Anchor body front end 13 Anchor body rear end 14 Expansion member 15 Washer 16 High nut 17 High nut rear end 18 Ceiling 19 Pilot hole 20 Operator 21 Electric tool 22 Handle 23 Grip 24 chuck

Claims (1)

An anchor driving tool that is connected to an electric power tool and is used to drive an anchor fitted with a high nut into a prepared hole drilled in a ceiling or a wall, and is provided on a hollow member and on a distal end side of the hollow member is, an anchor mounting portion that will be attached to the high-nut, and the rotation restricting member provided on the rear end side of said hollow member, formed of a rotary impact bars mounted to the power tool, the inside of the hollow member An anchor driving tool characterized in that the rotary hammer is assembled in a rotatable state.

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