GB2030486A

GB2030486A - Anchor bolt insertion tool holder

Info

Publication number: GB2030486A
Application number: GB7930301A
Authority: GB
Original assignee: Upat GmbH and Co; Upat Max Langensiepen KG
Current assignee: Upat GmbH and Co; Upat Max Langensiepen KG
Priority date: 1978-09-01
Filing date: 1979-08-31
Publication date: 1980-04-10
Also published as: DE7826026U1; AU5222979A; GB2030486B; ATA524679A; SE7907230L; AT366452B

Abstract

An anchor bar 2 is inserted into a drill hole. A bolt holder comprises a main body 3 containing a resilient sleeve 8 mounted in a bore so as to firmly grip the anchor bar and connect it drivingly to a drilling machine not shown for rotational and axial movement into the hole. The sleeve 8 is radially compressed by a screw or by radial movement of a roller 30 held in an axial slot of a sleeve 33. The sleeve 33 is rotatably held on the body 3 by a cross-bolt 34. A rotatable collar 27 has a cam surface for causing radial roller movement. <IMAGE>

Description

SPECIFICATION Auxiliary installing tool The invention relates to an auxiliary installing tool for introducing an anchor bar or the like, particularly a bar having an external thread, into a wall drill-hole fitted with an adhesive cartridge or the like, such auxiliary tool having means for connection to a drilling machine or the like as well as a releasable holding device for the anchor bar or the like.

Frequently, anchor bars do not have outer anchor ends designed especially as a connection for a drilling machine or the like, so that it is difficult and complicated to introduce such anchor bars into a wall drill-hole. These anchor bars must, as a rule, be introduced into the wall drill-hole by means of a turning movement and simultaneously an axial impact, as is possible, for example, with a hammer drill. It is thereby ensured that the adhesive cartridge situated in the wall drill-hole is destroyed, the adhesive components contained separately therein are thoroughly mixed and the adhesive is then disributed as homogeneously as possible. Upon the introduction of such anchor bars it is also necessary to prevent damage to the external thread optionally present, so that also a nut or such like fastening element can subsequently be screwed on securely.

Although auxiliary installing tools for use with a hand drill are already known, they necessitate, for example, special constructions of the anchor bar.

Other known auxiliary tools are difficult to handle and/or are expensive to construct.

The object of the present invention is therefore to provide an auxiliary installing tool of the abovementioned type, by means of which anchor bars including those having no specially designed connecting end are introducible into a wall drill-hole.

This auxiliary installing tool is to be simple to handle and is to be especially also connectable quickly and easily, yet securely, to the anchor bar.

According to the invention there is provided an auxiliary installing tool for introducing an anchor bar or the like into a wall drill-hole fitted with an adhesive cartridge or the like, the auxiliary tool having means for its operative connection to a drilling machine or the like and a releasable holding device for the anchor bar or the like, said holding device comprising a resilient clamping element operatively interacting with a gripping device.

The anchor bar can thus be surrounded at its outer end by the clamping element and then be connected fixed against rotation to the auxiliary installing tool by means of the gripping device. A special form of construction of the outer end of the anchor bar or the like is not necessary.

In a preferred form of construction the clamping element comprises a radially resiliently flexible sleeve disposed in an axial cavity of the auxiliary tool and braceable by means of the gripping device with respect to another bar or the like and to the wall of the axial cavity.

In so doing, the resilient sleeve forms the connecting element between the auxiliary tool body, on the one hand, and the anchor bar, on the other hand. By means of the gripping device the clear inner cavity of the resilient sleeve can be varied, so that an inserted anchor bar is flexible thereby. This form of construction of an auxiliary installing tool is especially simple in design.

According to a further proposal of the invention the clamping element can have a rotary clamping lock. This has appropriately a manually actuable rotary sleeve which braces the spring sleeve via at least one sleeve gripping element by means of an adjusting turning action in relation to the main body of the auxiliary tool.

The anchor bar or the like can thereby be connected to the auxiliary installing tool without any other tool (screwdriver, spanner, etc.). A turning of the rotary sleeve to be made by hand is sufficient.

The handling, especially the connecting and detaching of the anchor bar or the like can thereby be effected especially simply and quickly.

Additonal forms of construction of the invention are set forth in the further sub-claims and in the description.

In order that the invention may be readily understood, certain preferred embodiments will now be described with reference to the accompanying drawings in which: Figure 1 is a view taken partly in longitudinal section and partly only in portions of an auxiliary installing tool together with various connecting elements and an anchor bar in exploded representation, Figure la is a connecting element designed as socket headed screw, Figure 1b is a connecting element, modified in relation to Figure la, with a connecting shank, Figure 1c is a longitudinal section of a main body of the auxiliary tool, Figure 1d is the outer connecting end of an anchor bar, Figure 2 is a cross section of the main body shown in Figure 1c in the region of a tightening screw, Figure 3 is a longitudinal section of a modified auxiliary installing tool, Figure 4 is a longitudinal section of an only partly illustrated auxiliary installing tool with a rotary clamping lock, Figure 5 is a cross section of the auxiliary tool shown in Figure 4 along the line V-V in Figure 4, Figure 6 is a cross section corresponding to Figure 5, but here with a modified spring sleeve, Figure 7 is a perspective view of an intermediate element, Figure 8 is a longitudinal section of a modifed auxiliary tool with an only partly illustrated anchor bar ready for insertion, Figure 9 is a plan view of the outer end side of the auxiliary tool shown in Figure 8.

An auxiliary installing tool 1 (Figure 3) serves to introduce an anchor bar 2 (see Figure 1) into a wall drill-hole fitted with an adhesive cartridge or the like.

The auxiliary installing tool, abbreviated to "auxiliary tool 1" in the rest of the description, has as essential constituents a main body 3 on which are provided a connecting element 4 for a drilling machine or the like as well as a releasable holding device 5 for the anchor bar 2. The holding device 5 has an elastic clamping element 7 interacting with a gripping device 6. By means of the gripping device 6 the clamping element 7 can be brought into an open position and into a clamping position.

The clamping element 7 is formed substantially by a radially resiliently flexible spring sleeve 8 wghich is situated in an axial inner cavity 9 of the main body 3.

This spring sleeve 8 can be braced by means of the gripping device 6 both in relation to the anchor bar 2 and in relation to the wall 10 of the inner cavity 9. It is appropriately designed as a slotted sleeve with a preferably axially continuous longitudinal slot 40. In the especially simple embodiment shown in Figure 3 the gripping device 6 is formed by a screw 11 which engages approximately radially on the spring sleeve 8 and whose head 12 is sunk into the outer surface of the auxiliary tool 1. The screw 11 is designed here as a sockethead screw.The countersunk arrangement of this screw 11 has the advantage that during operation of the auxiliary installing tool 1 when it rotates about its longitudinal axis Lthe screw head 12 does not project beyond the otherwise smooth outer surface of the main body 3 in a disturbing manner and, as the case may be, also in a manner representing a risk of injury. The screw 11 is screwed into a radial threaded bore 13 provided in the main body 3 approximately at the middle section of the spring sleeve in respect of the length of said spring sleeve.

There serves as connecting element 4 in the present case (Figure 3) a shank 14 integral with the main body 3 and introducible into the chuck of a drilling machine.

Figures 8 and 9 show a modified embodiment of an auxiliary installing tool 1 a. Here, the tightening screw 11 is arranged obliquely to the longitudinal axis L of the auxiliary tool 1 a. The entry opening 15 of the threaded bore 1 3a provided for this screw is situated on the outer end side 16, adjacent the drilling machine or the like in the operative position of the auxiliary tool 1This has the substantial advantage that the tightening screw 11 is still readily accessible with a spanner or the like also at unfavourable assembly points. For example, the tightening screw 11 is thereby simple to actuate also in narrow recesses, in inside corner regions or the like, where the outer periphery of the auxiliary tool is inaccessible or only very poorly accessible for a spanner, a screwdriver or the like.Also the form shown in Figure 8 of the main body 3a is advantageous for these above-mentioned assembly conditions. Said main body is made preferably rotationally symmetrical and in the form of a truncated cone with its end of smaller cross section 17 adjacent the anchor bar.

An angle A of about 15 has proved advantageous for the oblique position of the tightening screw 11 to the longitudinal axis L of the auxiliary tool la.

However, this angle A can lie also in a range between about 10 and 30 in adaptation to the prevailing conditions. Figure 8 shows that a pressure element 18 arranged in axial extension of the screw 11 is inserted between the screw 11 and the bearing face on the outer surface of the spring 8. This pressure element 18 is formed by a key bolt 19, one end side 20 of which, radial in respect of the longitudinal axis of the key bolt 19, serves as bearing face for the screw 11 and which possesses a thrust face 21 directed in the operative position approximately parallel to the longitudinal axis L of the auxiliary tool and resting on the outer surface of the spring sleeve 8. The key bolt 19 is mounted in a threadlessextension of the threaded bore 13a.

With specific oblique positions (angle A) of the tightening screw 11 it may be advantageous if the key bolt 19 and the tightening screw 11 have a pull connection 42. Especially at smaller angles Athe opening of the spring sleeve 8 by partial turning of the screw 11 may thereby be promoted. The pull connection 42 may consist, for example, as suggested schematically in Figure 8, of wire thickened at the ends or of a similar engaging rod. Practice has shown that the key bolt 19 - without pull connection 42 - can be released, in order to detach the spring sleeve 8, also by an impact on the end side 16 after previous unscrewing of the screw 11.

There serves as connecting element 4 with the auxiliary tool 1 a according to Figure 8 and 9 a cavity, appropriately a hexagonal recess 22, to form a driving connection in the direction of rotation, which is introduced from the outer end side 16 to run centrally in the direction of the longitudinal axis L.

This hexagonal recess 22 is provided to accommodate a connecting piece to the drive element, especially to a drilling machine.

Figure 1 and especially Figures la and 1 b show further possible forms of construction of connecting elements 4. To accommodate these connecting elements, the main body 3 has a threaded bore 23 in axial communication with the inner cavity 9 for the spring sleeve 8. The connecting elements 4 according to Figures 1a and 1b can be screwed into said threaded bore and also can be connected fixed against rotation to the main body 3.

The connecting element 4 according to Figure 1a is designed as a socket-head screw 24. The embodiment of connecting element 4 shown in Figure lbis designed as a screw-in shank 25 with a lock nut 26.

A modified embodiment of an auxiliary installing tool 1b is shown in Figures 4 to 7. This auxiliary tool and especially its holding device 5 has a rotary clamping lock which is especially manually actuable and with which the holding device 5 can be brought into the open and into the clamping position. Such a manually actuable rotary clamping lock 27 has the advantage that auxiliary tools to operate the gripping device 6 are unnecessary.

The rotary clamping lock 27 has a rotary sleeve 28 which braces the spring sleeve 8 via at least one sleeve gripping element 29 by means of an adjusting turning action with respect to the main body 3. The rotary sleeve 28 is made spiral at least in regions in its inner contour (Figures 5 and 6). In the embodiment the spiral inner contour runs over half (in Figures 5 and 6 the lower) periphery of the rotary sleeve 28. There serves as gripping element 29 a rod 30 which rests in the functional position with one longitudinal side on the outer surface of the spring sleeve 8. The side of the rod 30 lying opposite this longitudinal resting side forms the stressing side for the spiral inner wall of the rotary sleeve 28. An intermediate element 31 serves to prevent movement of the bolt 30 in a peripheral direction when the rotary sleeve 28 is turned.As shown especially in Figure 7, this intermediate element is designed as a slotted sleeve 32 which has a slot-free sleeve part 33 closed at one end. This sleeve part 33 serves especially to connect the rotary sleeve 28 to the remaining part of the main body 3. The slotted sleeve 32 engages with its sleeve part 33 into an inner cavity of the remaining main body 3, where it is fixed by means of a crossbolt 34 both axially and against turning. A part of the sleeve part 33 projects into the inner cavity provided in the rotary sleeve.

Provided as connection between this rotary sleeve 28 and the sleeve part 33 is a turning and axial guide 35 which fixes the rotary sleeve 28 axially, but permits rotation of this sleeve in relation to the remaining basic body 3.

As turning and axial guide 35 an annular groove 36 is provided on the sleeve part 33 and a guide collar 37 engaging into the annular groove 36 is provided on the inner wall of the cavity in the rotary sleeve 28.

A retaining flange 38 for the rod 30 and also for the spring sleeve 8 can be seen at the end 17 of the auxiliary tool 1b on the anchor bar side.

Figures 5 and 7 reveal that the slotted sleeve 32 has two especially diametrically arranged axial longitudinal slots 39. Their axial length corresponds approximately to the spring sleeve 8. The rod 30 serving as gripping element 29 is mounted in one of these longitudinal slots 39.

In the present embodiment the spring sleeve 8 can be brought into the closing position (arrow Pf. 1) or into the open position (arrow Pf.2) by approximately half a revolution of the rotary sleeve 28 (Figure 5).

It should be mentioned that the spring sleeve 8 consists, as a rule, of a material softer than that of the anchor bar 2, for example of brass, aluminium or also of plastic. Damage of the connecting end of the anchor bar 2, especially when it has an external thread, is also thereby avoided. The spring sleeve 8 is appropriately designed as an interchangeable insert part. It can also have different wall thicknesses in adaption to different anchor bar diameters.

Figure 6 shows a modified spring sleeve 8a which is inserted into an auxiliary installing tool 16. With this spring sleeve 8a the one longitudinally running slot side of the slot 40 is bent radially outwards and forms a stop lug 41. This stop lug is situated in the operative position (Figure 6) within the slot 39 for the mounting of the bolt 30. The bolt rests in the peripheral direction, on the one hand, on a slot side of the slotted sleeve 32 and, on the other hand, on the stop lug 41. Due to this especial construction of the spring sleeve 8a it is prevented from turning when an anchor bar 2 is introduced.

All the features represented in the description, the claims and the drawings may be of material importance both individually and in any combination with one another.

Claims

1. An auxiliary installing tool for introducing an anchor bar or the like into a wall drill-hole fitted with an adhesive cartridge or the like, the auxiliary tool having means for its operative connection to a drilling machine or the like and a releasable holding device for the anchor bar or the like, said holding device comprising a resilient clamping element operatively interacting with a gripping device.

2. Auxiliary tool according to claim 1, in which the clamping element comprises a radially resiliently flexible sleeve disposed in an axial cavity of the auxiliary tool and braceable by means of the gripping device with respect to an anchor bar or the like and to the wall of the axial cavity.

3. Auxiliary tool according to claim 1 or 2, in which the gripping device comprises a screw.

4. Auxiliary tool according to claim 3 in which the head of the screw lies within the outer surface of the auxiliary tool.

5. Auxiliary tool according to claim 3 in which the tightening screw is arranged obliquely.

6. Auxiliary tool according to claim Sin which the axis of the screw makes an angle of substantially 10 to 30 with the longitudinal axis of the tool.

7. Auxiliary tool according to claim 5 or 6 in which the entrance to a threaded bore for the screw is situated on the outer end side, adjacent the connection for the drilling machine or the like, of the auxiliary tool.

8. Auxiliary tool according to claims 2 and 7, in which there is inserted between the screw and a bearing face of the outer surface of the resilient sleeve a thrust member which is displaceable in an axial extension of the threaded bore.

9. Auxiliary tool according to claim 8 in which a pull connection is provided between the thrust member and the screw.

10. Auxiliary tool according to claim 8 or 9, in which the thrust member comprises a key bolt, the one end side of which serves as bearing face for the screw and which possesses a thrust face directed in the operative position substantially parallel to the longitudinal axis of the auxiliary tool and engaging the outer surface of the resilient sleeve.

11. Auxiliary tool according to any of the preceding claims having a rotationally symmetrical main body.

12. Auxiliary tool according to claim 11 in which the main body is substantially in the form of a truncated cone with its end smaller in cross section directed towards the anchor bar receiving end.

13. Auxiliary tool according to any of the preceding claims, in which the clamping element has a rotary clamping lock.

14. Auxiliary tool according to claim 2 or any of claims 3 to 13 where dependent on 2 in which the rotary clamping lock comprises a rotatable sleeve which braces the resilient sleeve via at least one sleeve gripping element by means of an adjusting turning action relative to the main body of the tool.

15. Auxiliary tool according to claim 14 in which the rotatable sleeve is manually actuable.

16. Auxiliary tool according to claim 14 or 15 in which the rotary sleeve is made spiral at least in regions in its inner contour.

17. Auxiliary tool according to any of claims 14to 16, in which the gripping device includes at least one substantially axially directed bolt resting in the operative position on the spring sleeve a retaining flange for the bolt and the resilient sleeve being provided on the free end of the rotatable sleeve.

18. Auxiliary tool according to any of claims 14 to 17, in which an intermediate element is provided to connect the rotatable sleeve to the remaining main body part of the auxiliary tool.

19. Auxiliary tool according to claim 18, said intermediate element being formed by a slotted sleeve which has at one end a sleeve part serving as connecting element and forming thereat a turning and axial guide for the rotatable sleeve.

20. Auxiliary tool according to claim 19, in which the slotted sleeve has at least one axial longitudinal slot of substantially the same axial length as the spring sleeve the gripping element being mounted said longitudinal slot.

21. Auxilary tool according to claim 20 in which two diametrically arranged axial slots are provided in the slotted sleeve.

22. Auxiliary tool according to any of the preceding claims in which the connection means comprises a shank formed as an axial extension of the auxiliary tool main body.

23. Auxiliary tool according to claim 22 in which the shank is integral with the main body.

24. Auxiliary tool according to any of claims 1 to 21 in which the connection means is screwable releasably in an axial threaded bore in the main body of the tool.

25. Auxiliary tool according to claim 24 in which the screwable connection means or the auxiliary tool main body itself has a rotary drive connection in the form of a socket.

26. Auxiliary tool according to claim 25 in which said socket is hexagonal in cross section.

27. Auxiliary tool according to claim 24,25or26 in which the connection means comprises a sockethead screw which is screwable into the axial threaded bore of the main body.

28. Auxiliary installing tools substantially as hereinbefore described with reference to the accompanying drawings.