JP2008168428A - Turning leg of drill stand for tool device guided in rail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a turning leg of a drill stand in which stepless adjustment of a guide rail equipped inside a turning region is made with a comparatively small force, and fixing is performed with high flexibility. <P>SOLUTION: In the turning leg of the drill stand, a turning part 22 fixed to the guide rail 7 provided with a fixing portion 23 overlapped with supporting legs 13, 14 of a base part 12 equipped with the supporting legs 13, 14 is turnably fixed to the supporting legs 13, 14 of the base part 22 by a bearing 24, and by a fixing device 41 provided to the supporting legs 13, 14 of the base part 12 and separated from the bearing 24, the turning part 22 is fixed to the base part 12 allowing angle adjustment, and the fixing device 41 is provided with a fastening element 42 guided in a long hole 27. A chamfered edge region 29 is provided to the long hole 27. The fixing device 41 is provided with a clamp element 46 which is operable by the fastening element 42. A conical portion 47 provided to the clamp element 46 is in contact with the chamfered edge region 29 of the long hole 27. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a swivel leg of a drill stand for a tool device guided on a rail. The swivel leg has a base portion provided with at least one support leg and a swivel portion fixed to the guide rail, and the swivel portion has a fixing portion overlapping with at least one support leg of the base portion. Is provided. The swivel portion is fixed to at least one support leg of the base portion so as to be able to swivel by a bearing, and is fixed to the base portion by a fixing device provided at least one support leg of the base portion and spaced from the bearing. Adjust the angle to enable fixing. The fixing device is provided with a tightening element guided in the long hole.

  When a tool device guided by a rail such as a drill device is used, a drill hole can be provided in the base structure by, for example, a core drill crown. However, such drill holes are not always provided perpendicular to the surface of the substructure. In order to provide the drill hole at a certain angle with respect to the surface of the foundation structure, for example, the guide rail is supported so as to be pivotable with respect to the pivot axis, and is secured at an intended inclination by an additional fixing device. it can.

Patent Document 1 describes a drill stand including a substrate as a base portion. On the drill stand, a vertical column provided with a guide rail can be fixed by two support bases and a pivot shaft. A clamping lever that is spaced apart from the pivot shaft and guided in the long hole in the support base is provided as a clamping element, and the vertical column is fixed at an angle with respect to the plane extending from the base plate.
German Patent No. 19731773

  The known solution has the disadvantage that a high clamping force must be generated by the clamping lever in order to fix the vertical column so that it can withstand during operation of the tool device.

  An object of the present invention is a swivel leg of a drill stand for a tool device guided on a rail, which can perform stepless adjustment of a guide rail provided in a swivel region with a relatively small clamping force, and The object is to obtain a swivel leg that can be fixed with high flexibility.

  This problem is solved by the features described in the independent claims in the claims of the present invention. Preferred embodiments are set forth in the dependent claims.

  According to the present invention, a chamfered edge region is provided in the long hole, and the clamping device is provided with a clamp element operable by a clamping element, and a conical portion provided in the clamp element is chamfered at the end of the long hole. It is configured to be able to contact the edge region.

  The contact surface of the conical portion of the clamping element is adapted to the chamfered edge region of the long hole, so that a sufficiently large frictional coupling is generated, and the pivoting portion is stably attached to the base portion. At this time, the force required for tightening the tightening element can be greatly reduced compared to the known prior art. The angle of the swivel portion with respect to the base portion can be adjusted steplessly throughout the swivel region, and constitutes an end stopper that defines the maximum swivel region by the end of the long hole. The swivel leg of the present invention has a simple and compact configuration, and has a small number of individual parts and a simple structure, and therefore can be manufactured at low cost.

  Suitably, the base part is provided with fixing means, by which the base part can be arranged, for example, on a base plate or a foot plate of the drill stand. As an alternative, the base portion can be formed integrally with the base plate or the foot plate. Preferably, a connecting portion for the guide rail is provided in the swivel portion and fixed to the guide rail by an appropriate fixing means.

  Preferably, the chamfered edge region of the elongated hole and the gradient of the conical portion of the clamping element are the same, and they are configured to be substantially complementary to each other. When tightening the clamping element, the edge region of the slot and the conical outer contour of the clamping element are in contact with each other, so that the frictional coupling and the fixing of the member can be performed suitably. The clamping action that occurs between the members of the swivel legs enhances the clamping of the clamping element by a force equivalent to that generated by the wedge action.

  Preferably, the clamping element is constituted by a clamping screw provided with a male screw, and the clamping element is constituted by a sleeve provided with a female screw. The clamping screw is provided with rotational moment engaging means, for example a hexagonal head, for tools such as a screwdriver. When tightening the tightening screw, the sleeve is drawn to the chamfered edge region of the slot and a suitable frictional coupling occurs. The clamping screw and the sleeve are connected to each other in a non-separable manner by screws that engage with each other.

  Preferably, a long hole is provided in the fixed part of the turning part. The fixed portion of the swivel portion functions as a brake disk, and this fixed portion rotates around the swivel axis formed by the bearing. At the same time, when tightening the tightening element, the fixed portion of the swivel portion is pressed against at least one support leg of the base portion, and a frictional coupling is also generated between these members. The turning part is guided by the tightening element over the entire turning area, and the end stopper of the maximum turning area is constituted by the end of the long hole. By bringing the conical portion of the clamp element into partial contact with the side surface of the fixed portion of the swivel portion, a sufficient frictional coupling is generated between the two members in a state where the swivel leg is tightened.

  Preferably, the base part has two support legs which are parallel and spaced apart from each other, the fixing part of the swivel part is arranged between the support legs, and the fastening elements of the fixing device are two pieces of the base part. The clamp element is supported by one support leg of the base portion. The fastening device is safely and easily guided during the tightening and releasing operations. It is preferable that the clamp element is configured as a sleeve, a hole is formed in one of the support legs of the base portion, and this hole is substantially adapted to the outer diameter of the sleeve. It is preferable that the other supporting leg of the base portion opposite to this is provided with a hole substantially matching the shaft diameter of the fastening screw.

  In the second embodiment, the bearing is constituted by a fastening screw, and a male screw provided on the fastening screw is engaged with a female screw provided in a hole in a support leg of the base portion. As a result, a further clamping force for securing the swivel part to the base part can be produced in the area of the bearing.

  Next, preferred embodiments of the present invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals in principle.

  1 to 3 show a swivel leg 11 of a drill stand 6 according to the present invention. The drill stand 6 is used for a tool device (not shown) guided on a rail. The swivel leg 11 has a base portion 12 and a swivel portion 22, and the swivel portion 22 fixes the guide rail 7 for the tool device.

  The base portion 12 has two support legs 13 and 14 arranged in parallel and spaced apart from each other, and an installation portion 15 for connecting these support legs 13 and 14. The installation portion 15 has two screws 16 as fixing means, and the rotating legs 11 are fixed to the fixing portion 8 provided on the base plate 9 of the drill stand 6 by these screws 16.

  The swivel unit 22 includes a fixing portion 23 that is disposed between the support legs 13 and 14 of the base portion 12 and overlaps the support legs 13 and 14, and a connection portion 33 that can be connected to the guide rail 7. A screw 34 is provided as a fixing means in the connecting portion 33, thereby fixing the guide rail 7 to the turning portion 22. The swivel unit 22 is fixed to the swivel leg 13 and the swivel leg 14 of the base unit 12 so as to be able to swivel by the bearing 24. The bearing 24 is constituted by a tightening screw 25, the tightening screw 25 is passed through a hole 17 provided in the support leg 14 of the base portion 12, and a screw hole having a female screw provided in the support leg 13 of the base portion 12. 18 is engaged.

  A fixing device 41 spaced from the bearing 24 is provided on the support leg 13 and the support leg 14 of the base portion 12, and the turning portion 22 is fixed to the base portion 12 by adjusting the angle by the fixing device 41. A long hole 27 is provided in the fixing portion 23 of the swivel portion 22, and the long hole 27 extends along the radius of the swivel axis 26 formed by the bearing 24. Further, the end portion 28 of the long hole 27 defines a maximum swivel region with respect to the base portion 12 of the swivel portion 22. The fixing device 41 includes a tightening element 42 guided through the long hole 27 and a clamp element 46 that can be operated by the tightening element 42 and acts on the fixing portion 23 of the turning portion 22.

  The clamping element 42 is constituted by a clamping screw provided with a male screw, and the clamping element 46 is constituted by a sleeve provided with a female screw. The clamping element 42 is supported on the two support legs 13 and 14 of the base portion 12, and the clamp element 46 is supported on the support leg 13.

  A conical portion 47 is provided on the clamping element 46. In addition, the elongated hole 27 is provided with a chamfered edge region 29 at a portion linked to the clamp element 46 on the side surface of the tightening portion 23 of the turning portion 22. The chamfered edge region 29 is provided with the same slope as the conical portion 47 of the clamping element 46 and is configured to be substantially complementary to the conical portion 47.

  After the turning portion 22 is adjusted with respect to the base portion 12 at a target angle, the turning portion 22 is fixed to the base portion 22 by the fastening element 24. At this time, the clamp element 46 is attracted toward the fixed portion 23 of the turning portion 22, and a suitable frictional coupling is generated between the clamp element 46 and the portion of the support leg 11. By using the tightening screw 25 as the bearing 24 and engaging the bearing 24 with the female screw of the hole 18 in the support leg 13 of the base portion 12, the swiveling portion 22 is additionally tightened in the region of the bearing 24. . In order to change the angle of the revolving part 22 with respect to the base part 12, the tightened tightening element is loosened again, the angle is newly adjusted, and then tightened again.

It is a side view of the turning leg of this invention. It is a longitudinal cross-sectional view on the II-II line of the turning leg shown in FIG. FIG. 3 is a transverse cross-sectional view of the swivel leg shown in FIG. 2 on the line III-III.

Explanation of symbols

6 Drill stand 7 Guide rail 8 Fixed part 9 Foundation plate 11 Turning leg 12 Base part 13 Supporting leg 14 Supporting leg 15 Installation part 16 Screw 17 Hole 18 Screw hole 22 Turning part 23 Adhering part 24 Bearing 25 Fastening screw 26 Turning axis 27 Long hole 28 End portion 29 Edge region 33 Connecting portion 41 Fixing device 42 Tightening element 46 Clamping element 47 Conical portion

Claims (5)

A swivel leg of a drill stand (6) for a tool device guided on a rail,
A base (12) with at least one support leg (13, 14);
A swivel portion (22) fixed to the guide rail (7), wherein the swivel portion (23) is provided with a fixing portion (23) overlapping with at least one support leg (13, 14) of the base portion (12). 22)
Have
The swivel portion (22) is fixed to at least one support leg (13, 14) of the base portion (22) so as to be able to swivel by a bearing (24), and at least one of the base portion (12) The fixing device (41) provided on the support legs (13, 14) apart from the bearing (24) can be fixed to the base portion (12) by adjusting the angle,
In the fixing device (41), in the swivel leg for the drill stand provided with a tightening element (42) guided to the long hole (27),
A chamfered edge region (29) is provided in the elongated hole (27),
The fixing device (41) is provided with a clamp element (46) operable by the tightening element (42), and a conical portion (47) provided on the clamp element (46) is provided in the elongated hole (27). A swivel leg characterized in that it can be brought into contact with a chamfered edge region (29).   The swivel leg according to claim 1, wherein the chamfered edge region (29) of the elongated hole (27) and the conical part (47) of the clamping element (46) have the same gradient.   3. A swivel leg according to claim 1 or 2, wherein the clamping element (42) is constituted by a fastening screw provided with a male screw, and the clamp element (46) is constituted by a sleeve provided with a female screw.   The swivel leg according to any one of claims 1 to 3, wherein a long hole (27) is provided in a fixed portion (23) of the swivel part (22).   5. The swivel leg according to claim 1, wherein the base part (12) has two support legs (13, 14) which are parallel and spaced apart from each other, and the fixing part (23) of the swivel part (22). ) Is disposed between the support legs (13, 14), the clamping element (42) of the fixing device (41) is supported by the two support legs (13, 14) of the base part (12), and clamped. A swivel leg in which the element (46) is supported on one support leg (13) of the base portion (12).

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