JPH0723182Y2 - Hammer drill holding device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding a hammer drill when attaching a concrete anchor to a ceiling wall or the like using the hammer drill.

[0002]

2. Description of the Related Art A so-called hammer drill is widely used as an electric tool for attaching a concrete anchor to a concrete ceiling wall. This hammer drill has two functions of rotation and striking. When attaching a concrete anchor, first, a drilling drill is attached to the tip of the working rod, and the working rod is rotated to drill the ceiling wall. Next, in place of the drill, a striking attachment having a projection at its tip is attached to the tip of the work rod, and the concrete anchor is held via the projection of this attachment. The concrete anchor is shown in Fig. 10.
As shown in FIG. 3, the upper end thereof has a reverse taper-shaped projection 30 for driving, and the lower end has a screw hole 31, and the projection at the tip of the attachment is inserted into the screw hole 31 to attach a concrete anchor to the work rod tip. Hold. Then, the projection 30 of the concrete anchor is applied to the attachment hole formed in the ceiling wall, and the projection 30 is driven into the attachment hole by hitting with the work rod.

[0003]

Conventionally, the work of attaching such a concrete anchor is carried out by an operator while holding the hammer drill by hand, but the hammer drill is heavy, and vibration due to perforation or impact is added. Therefore, there is a problem that the operator's physical burden is large. Further, when this work is performed from the floor, the work rod of the hammer drill has a long length, so that a large moment of inertia acts during drilling by the drill, and this moment of inertia swings the worker, which poses a great risk to the work. In addition, even when performing work on a rolling tower for scaffolding or a stepladder, the working rod requires a certain length, and therefore, there are the same problems as described above. When working from the tower or stepladder,
If the tip of the drill is entangled with the reinforcing bar inside the concrete and the drill is swung around, there is a risk that the worker will fall from the scaffold.

The present invention has been made in view of such conventional problems, and it is possible to safely and efficiently carry out the work of attaching a concrete anchor by holding a hammer drill on the floor. It is an object of the present invention to provide a device that does not require any person to hold the hammer drill.

[0005]

DISCLOSURE OF THE INVENTION The present invention for achieving the above object comprises a leg portion, a fixed column vertically fixed to the leg portion, and a slide column slidable upward from the fixed column. And a rod guide fixed to each upper end of the fixed column and the slide column, a drill holder attached to the fixed column so as to be slidable up and down, and a top and bottom attached to the upper part of the fixed column. A rotatable arm, a wire or chain for suspending a drill holder, one end of which is connected to an end of the arm, and a winding means provided on the drill holder for winding the wire or chain. A holding device for a hammer drill, wherein the winding means includes a winding reel, rotation operating means for the winding reel, and locking means for holding the winding reel in a non-rotating state. is there.

A more preferred construction of such a holding device is that the legs are located directly below the casters with stoppers that allow the device to move and the working rod of the held hammer drill and are displayed on the floor. And a positioning member that can be positioned on the marking. The slide column that slides upward from the fixed column can be configured by two or more column bodies that extend stepwise in a stretchable fishing rod shape. In this case, it is preferable to provide a rod guide on the upper end of each column for guiding the work rod.

[0007]

The strut can be extended in accordance with the length of the working rod of the hammer drill to be guided by sliding the slide strut upward with respect to the fixed strut. The drill holder is vertically slidable with respect to the fixed column and is suspended at an arbitrary height by a wire or a chain extending from the upper part of the fixed column. The drill holder moves up and down along the fixed column by winding or unwinding the wire or chain by the winding means, and the winding reel is kept in a non-rotating state by the locking means provided in the winding means. By holding it, the fixed column is held at an arbitrary height. By rotating the arm above the fixed column and lifting the wire or chain connected to this arm upward, the drill holder can be raised by a predetermined height.

The hammer drill is attached to the drill holder, and the working rod of the hammer drill is passed through the rod guides of the fixed column and the slide column. The support column is extended according to the length of the working rod, and the rod guide supports the working rod. The height of the drill holder on the fixed column is adjusted by the winding means according to the height of the ceiling wall and the length of the work rod. When drilling with a hammer drill or hitting a concrete anchor,
Position the tip of the working rod with the drilling drill or the impact attachment (impact attachment with the concrete anchor attached) directly below the concrete anchor attachment part, and rotate the arm when the hammer drill starts operating. Raise the drill holder and drill or punch concrete anchors.

In addition, in the device provided with the alignment member, if the alignment member is aligned with the marking indicating the concrete anchor attachment position displayed on the floor, the working rod of the hammer drill can be installed at the concrete anchor attachment position. It will be located directly below.

[0010]

1 to 8 show an embodiment of the present invention. FIG. 1 is an overall perspective view and FIG. 2 is a side view. In the figure, reference numeral 1 is a leg portion that supports the entire apparatus, and is provided with a caster 28 with a stopper to make the apparatus movable. The leg portion 1 of the present embodiment includes three foldable legs, and the casters 28 are provided at the tips of the three legs and directly below the column.
have.

Reference numeral 2 denotes a support column which is erected on the leg portion 1,
The column 2 is composed of a fixed column 3 which is vertically fixed to the leg portion 1, and a slide column 4 which is housed in the fixed column 3 and can be slid upward as appropriate. Therefore, the pillar 2 can be expanded and contracted by sliding the slide pillar 4 in the vertical direction with respect to the fixed pillar 3. In this embodiment, in order to secure strength, the fixed pillar 3 and the slide pillar 4 which form the pillar 2 are composed of two parallel pillars. Further, the column 2 has locking means (not shown) that can lock the slide column 4 on the side of the fixed column in an arbitrary sliding state.

Rod guides 7 and 8 for guiding the working rod of the hammer drill are provided at the upper ends of the fixed column 3 and the slide column 4, respectively. The rod guides 7 and 8 have guide holes 71 and 81 for inserting work rods. Reference numeral 5 denotes a drill holder that should hold a hammer drill. The drill holder 5 is a sliding portion 5 slidably fitted on the drill mounting portion 51 and the fixed column 3.
2 and is attached to the fixed column 3 via the sliding portion 52 so as to be vertically slidable.

On the upper end of the fixed column 3, an arm 9 which is vertically rotatable is attached as shown in FIG. A bracket 11 is provided on the upper end of the fixed column 3, and an arm 9 is pivotally attached 91 to the bracket 11 via a longitudinal intermediate portion thereof. A holding wire 13 is connected. The bracket 11 and the pivotally-attached portion 91 of the arm are covered with a rubber cover 12.

The structure of this arm may be, for example, as shown in FIG. In the structure example of FIG. 9, the end of the arm 9 is pivotally attached 91 to the bracket 11 provided on the upper end of the fixed column 3, and the second arm 10 is attached to the bracket 11 via the longitudinal intermediate portion. It is pivotally mounted 100 so as to be rotatable. The arm 9 has a mounting hole 92 in the shape of a long hole in a portion near the end thereof, and one end of the arm 10 is slidably supported in the mounting hole 92. The wire 13 for suspending the drill holder is connected to the other end of the arm 10.

Winding means 6 for winding the wire 13 for suspending the drill holder is provided on the side of the drill holder 5. The winding means 6 is provided with a winding reel 15 for winding the wire 13, a rotating operation means for the winding reel, and a locking means for holding the winding reel in a non-rotating state. The details are shown in FIGS. 3, 4 and 6.

That is, the casing 14 is fixed to the side of the sliding portion 52 of the drill holder 5, and the casing 1
A take-up reel 15 is rotatably arranged inside the unit 4. The end of the wire 13 is locked to the take-up reel 15. The take-up reel 15 has a worm wheel 16 concentric with the reel portion on one end side thereof. Also,
A worm gear 17 meshing with the worm wheel 16 is arranged in the casing 14, and the worm gear 17
A shaft body 18 connected to one end of the casing 18 penetrates the casing 14 and is guided to the outside of the casing, and a mounting portion 19 to which a wrench or the like for rotating operation is mounted is provided at the tip thereof.
As shown in FIG. 6, a screw hole 20 is formed in the shaft center of the worm wheel 16, and a fixing bolt 21 inserted into the screw hole 20 through a through hole 22 of the casing 14.
The threaded portion 210 is screwed. Further, a spring washer 23 is externally mounted on the bolt shaft portion between the worm wheel 16 and the casing 14.

In such a winding means 6, the fixing bolt 2
By tightening 1 into the screw hole 20, the spring washer 23 causes the worm wheel 16 and the casing 1
The worm wheel 16 and the take-up reel 15 integrated with the worm wheel 16 cannot rotate due to friction between the spring washer 23, the worm wheel 16 and the casing 14 due to compression between the four. On the other hand, when the fastening bolt 21 is loosened as shown by the phantom line in FIG. 6, the restraint between the worm wheel 16 and the casing 14 by the spring washer 23 is released, so that the worm wheel 16 and the take-up reel 15 integrated with the worm wheel 16 are released. , So that it can be rotated together with the fixing bolt 21. In this state, as shown in FIG. 3, when the wrench B or the like is attached to the mounting portion 19 and the worm gear 17 is rotated, the take-up reel 15 is rotated and the wire 13 is wound or rewound, and the drill holder 5 moves up and down along the fixed column 3.

Further, the drill holder 5 can be slid upward by a predetermined height by operating the arm 9 in addition to the raising and lowering by the winding means 6. That is, as shown in FIG. 5, when the arm 9 is rotated downward, the wire 13 connected to the arm 9 is lifted upward, and the drill holder 5 is lifted by an amount corresponding to the rise of the wire 13.
Slides up.

As shown in FIG. 7, the leg portion 1 is provided with an alignment member 24 for aligning with the marking displayed on the floor. The positioning member 24 is a plate having a horizontal tip extending near the floor surface, and a small window hole 240 is provided in the tip, and the small window 240 is held by the drill holder 5. The hammer drill is configured to be located just below the working rod (that is, on the extension of the axis x of the working rod as shown in FIGS. 2 and 7).

Further, as shown in FIG. 8, the leg 1 is provided with a pedal 25 for holding the device in a fixed position for safety. A shaft 26 having a flange 260 at the upper end is erected on one end side of the pedal 25, and the shaft 26 is inserted into a through hole penetrating the leg 1. The collar portion 26
A spring 27 is installed on the shaft portion between 0 and the leg portion 1. The spring 27 biases the shaft body 26, and the pedal 2
5 is lifted upward. Therefore, by stepping on the pedal 25 with the foot, the collar portion 260 of the shaft body 26 compresses the spring 27 and pushes the leg portion 1 downward to restrain the leg portion 1, thereby preventing the leg portion 1 from rotating during work. You can

The slide column 4 that slides upward from the fixed column 3 can be composed of two or more column bodies that extend stepwise like a fishing rod. In this case, it is preferable to provide a rod guide on the upper end of each column for guiding the work rod. Further, a chain may be used instead of the wire 13.

Next, a method of using the holding device will be described.
As shown in FIGS. 1 and 2, the hammer drill A is attached to the drill mounting portion 51 of the drill holder 5, and the working rod a of the hammer drill A is the rod guides 7 of the fixed column 3 and the slide column 4. Passed through 8. The pillar 2 is
By sliding the slide column 4 upward with respect to the fixed column 3, it is extended according to the length of the working rod a,
The rod guides 7 and 8 support the working rod a.

The height of the drill holder 5 on the fixed column 3 is adjusted by operating the winding means 6 according to the height of the ceiling wall and the length of the work rod a, and By tightening the fixing bolt 21 and holding the take-up reel 15 in a non-rotating state, the fixed column 3 is held at a predetermined height. The device is positioned by aligning the small window 240 of the alignment member 24 with the marking on the floor (the displayed marking on the floor just below the concrete anchor attachment position on the ceiling wall). As a result, the working rod a of the hammer drill A is located immediately below the concrete anchor mounting position.

When the hammer drill A is actuated, the arm 9 is rotated to raise the drill holder 5, and the working rod a is brought closer to the ceiling wall to drill or punch concrete anchors. In addition,
When moving the device of the present invention while holding the hammer drill, the beams on the ceiling may obstruct the movement.
In this case, the beam or the like can be easily cleared by lowering the drill holder 5 by the winding means 6.

[0025]

According to the present invention described above, the hammer drill can be held and carried out without the intervention of an operator, so that the physical burden on the operator can be greatly reduced as compared with the prior art. In addition, the work itself can be performed extremely safely. Further, since the work rod of the hammer drill can be supported by the extendable column and the rod guide, the concrete anchor can be attached to the high ceiling wall without any problem. further,
Since the concrete anchor attachment position can be easily aligned compared to the conventional method, there is an advantage that the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the device of the present invention.

FIG. 2 is a side view of the device shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a side view partially showing the arm attachment portion of the device shown in FIGS. 1 and 2 with the cover omitted.

6 is a horizontal sectional view partially showing a fixing bolt attachment portion of the winding means shown in FIG.

FIG. 7 is a perspective view showing a mounting state of a positioning member of the apparatus shown in FIGS. 1 and 2.

8 is a perspective view partially showing a mounting state of pedals of the device shown in FIGS. 1 and 2. FIG.

FIG. 9 is a side view partially showing another embodiment of the arm attachment portion of the device of the present invention with the cover omitted.

FIG. 10 is a perspective view showing a concrete anchor.

[Explanation of symbols]

1 ... Legs, 2 ... Posts, 3 ... Fixed columns, 4 ... Slide columns, 5
... Drill holder, 6 ... Winding means, 7, 8 ... Rod guide, 9, 10 ... Arm, 11 ... Bracket, 13 ... Wire, 14 ... Casing, 15 ... Winding reel, 16 ... Worm wheel, 17 ... Worm gear , 18 ... Shaft, 19
... Mounting portion, 20 ... Screw hole, 21 ... Fixing bolt, 22 ... Through hole, 23 ... Spring washer, 24 ... Positioning member, 25 ... Pedal, 26 ... Shaft body, 27 ... Spring, 2
8 ... Caster, 51 ... Drill mounting part, 52 ... Sliding part, 7
1, 81 ... Guide hole, 91, 100 ... Pivoting part, 92 ... Mounting hole, 210 ... Screw hole, 240 ... Small window hole, 260 ... Collar part, A ... Hammer drill, a ... Work rod

Claims (2)

[Scope of utility model registration request] 1. An extendable and retractable column comprising a leg, a fixed column vertically fixed to the leg, and a slide column slidable upward from the fixed column, and upper ends of the fixed column and the slide column. A rod guide fixed to the portion, a drill holder attached to the fixed column so as to be vertically slidable,
A vertically rotatable arm attached to the upper part of a fixed column, a wire or chain for suspending a drill holder having one end connected to an end of the arm, and the drill for winding the wire or chain. A take-up means provided on the holding body, the take-up means, a take-up reel, a rotation operation means for the take-up reel, and a locking means for holding the take-up reel in a non-rotating state. Holding device for hammer drill. 2. A positioning device in which a leg portion is located immediately below a caster with a stopper that enables movement of the device and a working rod of a hammer drill held, and can be aligned with a marking displayed on the floor. And a member.
Holder for the hammer drill described in.