JP3147842U - Drill stand - Google Patents

Abstract

An object of the present invention is to improve workability and safety in drilling work using a drill stand. A damper 5 is provided between a support column 1 standing on a floor surface F and a slide member 2 pushed up by a handle 3 while holding a drill D, thereby suppressing the lowering of the slide member 2. The operator M can apply a sufficient drilling thrust to the drill D with a smaller force than before so that the drilling operation can be performed efficiently. Further, by adjusting the repulsive force of the damper 5 so that the handle 3 does not jump up even when the operator M releases his / her hand during the drilling operation, it is possible to prevent a disaster due to a handle operation error. . [Selection] Figure 2

Description

  The present invention relates to a drill stand used in drilling work on a ceiling surface or the like of a building.

The drill stand is used to hold a drill when drilling a hole from below with an electric vibratory drill (hereinafter simply referred to as “drill”) on the ceiling surface of a concrete building in general construction work. It is often used to apply an upward drilling thrust to a drill (for example, see Patent Document 1).
Japanese Utility Model Publication No. 60-29411

  FIG. 5 shows an example of a drill stand as described above. In this drill stand, a slide member 52 having a drill holder portion 52 a is slidably attached in a vertical direction to a column 51 standing on a floor surface F, and a central portion of a rod-like handle 53 is connected to the column 51 in the center of the column 51. The slide member 52 and the one end portion of the handle 53 are connected to each other by a link member 54 that is rotatably attached to the slide member 52 and the handle 53 is rotated. 52 is moved up and down.

  If the above-described drill stand is used, the slide D 52 and the drill D held on the drill holder 52a can be lifted simply by grasping and lowering the grip 53a of the handle 53 with the column 51 standing on the floor F. Since the upward drilling thrust is given to the drill D, the workability and safety of the drilling work are greatly improved as compared with the case where the operator climbs the stepladder and pushes up the drill by hand.

  However, the conventional drill stand as described above still has considerable room for improvement in terms of workability and safety. That is, in the conventional drill stand, the weight of the drill of about 10 to 12 kg usually acts in the direction of pulling back the drilling thrust, so that during drilling work, the operator holds the handle with considerable force to give the drill a thrust. It is necessary to continue to hold this, and this becomes a heavy burden on the worker and becomes a factor that hinders improvement in work efficiency. In terms of safety, there is a problem that if the operator accidentally removes his / her hand from the handle during the drilling operation, the handle may jump up due to the weight of the drill and hit the operator's face.

  Further, as shown in FIG. 5, if this force is used to apply the drilling thrust to the drill D, the amount of operation of the grip portion 53 a provided at the other end of the handle 53 (the amount of movement in the vertical direction). ) Becomes larger. In addition, since the handle gripping portion 53a extends in the longitudinal direction of the handle 53, in the drilling operation, the way of gripping the handle 53 during the lowering of the handle gripping portion 53a from the position at the start of the operation is shown in FIG. ) Must be changed from a method of holding down as shown in FIG. 6B to a method of holding down as shown in FIG. Since it is necessary to interrupt the drilling operation once to change the handle 53, a time loss may occur until the operation is resumed, and the work posture during that time may become unstable and dangerous.

  Furthermore, in terms of safety, it is not preferable from the viewpoint of work hygiene that the vibration of the drill is transmitted to the hand of the worker holding the handle during drilling work, and when the drill's drill bites into the reinforcing bar in the concrete, When the rotation of the drill body stops and the drill body rotates, the handle may be swung (rotated in the horizontal direction) and the operator may be injured.

  An object of the present invention is to improve workability and safety in drilling work using a drill stand.

  In the present invention, a slide member having a drill holder portion is slidably mounted in a vertical direction on a column that is erected on a floor surface, and a bar-like handle is mounted on one of the column and the slide member in a plane parallel to the column. The slide member is attached so as to rotate, and the other of the support column and the slide member and the handle are connected to each other by a link member that is rotatably attached to each other, and the handle is rotated so that the slide member is rotated. In the drill stand that is moved up and down, as a first means for solving the above-described problem, a configuration is adopted in which a damper that suppresses the descent of the slide member is provided between the support column and the slide member.

  That is, a direction in which the operator lowers the grip side of the handle by providing a damper that suppresses the descent of the slide member between the column that stands on the floor and the slide member that is pushed up by the handle while holding the drill. Of these forces, the force spent to support the weight of the drill was reduced, and most of the force became the thrust for drilling so that drilling work could be performed efficiently. Then, by adjusting the repulsive force of the damper so that the handle does not jump up even if the operator removes his / her hand during the drilling operation, it is possible to prevent a disaster due to a handle operation error.

  In addition, the present invention adopts a configuration in which a grip portion extending in a direction perpendicular to the rotation surface of the handle is provided at a position away from the rotation fulcrum of the handle as a second means for solving the above-described problem. did. In this way, since the handle operation during the drilling operation can smoothly transition from the pull-down operation to the push-down operation and from the pull-up operation to the push-up operation, the work interruption time for the conventional handle change can be eliminated, The working posture can also be stabilized.

  Further, in the present invention, as a third means, when the slide member is a cylindrical member that is passed through the support column, the cylindrical slide member is connected to the upper cylinder having the drill holder portion and the link. A configuration was adopted in which the upper cylinder and the lower cylinder were separated by a coil spring that was passed through a column between the two cylinders, separated into a lower cylinder to which a member or handle was attached. If it does in this way, the vibration of a drill will be absorbed by the expansion-contraction of the axial direction of a coil spring, and it will become difficult to be transmitted to an operator. In addition, when the drill's cone bites into the concrete rebar and stops, the rotational movement of the drill body can be absorbed by the elastic deformation in the winding direction of the coil spring, making it difficult for the handle to be swung and causing injury to the operator. The risk of doing so is eliminated.

  As described above, if the drill stand of the present invention is used, the workability and safety in the drilling operation can be greatly improved as compared with the conventional case. That is, according to the first means of the present invention, the operator can reduce the force to support the weight of the drill, so that the drill can be efficiently drilled by applying sufficient drilling thrust to the drill, and the operator can remove from the handle. By preventing the handle from jumping up even when the hand is released, it is possible to prevent a disaster due to a handle operation error. Further, according to the second means, it is possible to eliminate the time loss due to the change of the handle during the drilling operation and to stabilize the working posture. Further, according to the third means, it is possible to improve the work hygiene by making it difficult for the vibration of the drill to be transmitted to the operator, and also to prevent the handle from being swung when the drill's cone is caught in the reinforcing bar. A disaster can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. This drill stand basically has the same structure as the conventional one, and as shown in FIG. 1, a slide member 2 holding a drill D can be slid in a vertical direction on a column 1 standing on a floor surface F. A link member that attaches the central part of the rod-like handle 3 to the central part of the support column 1 so as to rotate in a plane parallel to the support column 1 and allows the slide member 2 and the handle 3 to be rotatably attached to each other. 4, the operator M rotates the handle 3 so that the slide member 2 moves up and down integrally with the drill D. In addition, the support | pillar 1 inserts the small diameter part 1b in the cylindrical large diameter part 1a, and is connected so that a slide is possible, and can be expanded-contracted according to the height of the ceiling surface C. FIG.

  Accordingly, in the state shown in FIG. 1, the operator M simply turns the handle 3 in the direction of the arrow, and as shown in FIG. 2, the drill D is raised to the height of the ceiling surface C, and the drill D is drilled upward. Drilling can be performed while applying thrust.

  In this drill stand, a damper 5 that suppresses the descent of the slide member 2 is provided between the large-diameter portion 1a of the support column 1 and the slide member 2 as an unprecedented configuration. The damper 5 is adjusted in repulsive force so that the handle 3 does not jump up due to the weight of the drill D even if the operator M accidentally releases his hand from the handle 3 in the state shown in FIG. The damper 5 can be an oil damper or a gas damper.

  Further, as shown in FIG. 3, the slide member 2 includes an upper cylinder 6 and a lower cylinder 7 that are respectively passed through the large-diameter portion 1 a of the support column 1. It is connected by a coil spring 8 passed through the portion 1a. The coil spring 8 is bent so that both ends thereof are directed outward in the axial direction, and are fixed to the flange portions of the upper cylinder 6 and the lower cylinder 7. The upper cylinder 6 is provided with a drill holder portion 6 a for holding the drill D by bolting, and the lower cylinder 7 is connected to one end portion of the link member 4 and one end portion of the damper 5.

  The handle 3 is pivotally attached to the side surface of the handle support portion 1c protruding from the support large-diameter portion 1a at the center in the longitudinal direction, and one end thereof is connected to the other end of the link member 4. Further, a grip portion 3 a for the worker M to grip is provided at the other end of the handle 3. As shown in FIG. 4A, the grip portion 3a extends in a direction perpendicular to the rotation surface of the handle 3, and the handle operation during the drilling operation is pulled down (or pushed up) shown in FIG. 4B. ) Between the operation and the push-down (or pull-up) operation shown in FIG. An activation switch button 3b of the drill D is attached to the tip of the grip portion 3a so that the operator M can press the button 3b with a hand holding the grip portion 3a. For this reason, the worker M can perform the start / stop operation of the drill D more easily than in the past (see the position of the switch button 53b in FIG. 6).

  This drill stand has the above-described configuration, and the damper 5 that suppresses the descent of the slide member 2 is provided so that the force for supporting the weight of the drill D is almost unnecessary. Therefore, the operator M is smaller than the conventional one. A sufficient drilling thrust is imparted to the drill D by force, and the drilling operation can be performed efficiently. Further, even if the operator M releases his / her hand from the handle 3, the handle 3 does not jump up, so that the safety is higher than in the conventional case.

  Further, since the grip portion 3a of the handle 3 is provided so as to extend in a direction perpendicular to the rotation surface of the handle 3, the handle 3 can be operated without changing the grip, so that the drilling operation is performed more than before. The time loss can be reduced, and the worker M can continue working in a stable posture.

  Furthermore, since the slide member 2 is formed by connecting the upper cylinder 6 having the drill holder portion 6 a and the lower cylinder 7 to which the link member 4 is attached by the coil spring 8, the vibration of the drill D causes the coil spring 8 to vibrate. It is absorbed by the expansion and contraction in the axial direction and is not easily transmitted to the worker M, and the work hygiene is improved as compared with the prior art. Further, even when the drill D is rotated when the cone of the drill D rotates and the main body of the drill D rotates when the cone of the drill D bites into the reinforcing bars arranged in the concrete forming the ceiling surface C, the rotation of the coil spring 8 is reduced. Since it can be absorbed by elastic deformation in the winding direction, the handle 3 is less likely to be swung and the operator M is not injured.

  In the above-described embodiment, the handle is attached to the support column and the handle and the slide member are connected by the link member. However, in the present invention, the handle is attached to the slide member and the handle and the support member are connected by the link member. The drill stand can also be applied.

Front view of the drill stand of the embodiment The front view which shows the state in the time of the drilling work of the drill stand of FIG. Longitudinal sectional view of the main part of the drill stand of FIG. (A) is a top view of the principal part of the handle | steering-wheel of FIG. 1, (b), (c) is each explanatory drawing of handle operation. Front view of a conventional drill stand Explanatory drawing of the handle operation of the drill stand of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Slide member 3 Handle 3a Holding part 4 Link member 5 Damper 6 Upper cylinder 6a Drill holder part 7 Lower cylinder 8 Coil spring C Ceiling surface D Drill F Floor surface M Worker

Claims (3)

  A slide member having a drill holder portion is slidably attached to a support column standing on the floor so that it can be slid up and down, and a rod-like handle is rotated on one of the support column and the slide member in a plane parallel to the support column. And the other of the support column and the slide member and the handle are connected to each other by a link member rotatably attached thereto, and the slide member is moved up and down by rotating the handle. In the drill stand, a damper is provided, wherein a damper is provided between the support column and the slide member to suppress the slide member from descending.   A slide member having a drill holder portion is slidably attached to a support column standing on the floor so that it can be slid up and down, and a rod-like handle is rotated on one of the support column and the slide member in a plane parallel to the support column. And the other of the support column and the slide member and the handle are connected to each other by a link member rotatably attached thereto, and the slide member is moved up and down by rotating the handle. The drill stand according to claim 1, wherein a grip portion extending in a direction perpendicular to the rotation surface of the handle is provided at a position away from the rotation fulcrum of the handle.   A slide member having a drill holder portion is slidably attached to a support column standing on the floor so that it can be slid up and down, and a rod-like handle is rotated on one of the support column and the slide member in a plane parallel to the column. And the other of the support column and the slide member and the handle are connected to each other by a link member rotatably attached thereto, and the slide member is moved up and down by rotating the handle. In the drill stand, the slide member is a cylindrical member that is passed through the support column, and the cylindrical slide member includes an upper cylinder having the drill holder portion and a lower cylinder to which the link member or handle is attached. The upper cylinder and the lower cylinder are connected to each other by a coil spring that is passed through a column between the two cylinders. Drill stand.

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