Device for Nailing Cast in Place Anchors

Abstract

A device for nailing cast in place anchors includes a housing, which has an anchor receptacle for receiving a cast in place anchor, a nail gun abutment for abutting against a nail gun, and a ram, which extends into the housing towards the anchor receptacle and which is axially displaceable with respect to the housing. The ram has a striking surface facing the anchor receptacle for striking the cast in place anchor disposed in the anchor receptacle. The ram further has a striker abutment for abutting against a striker of the nail gun that is positioned at the nail gun abutment.

Claims

1.-19. (canceled)

20. A device (10) for nailing cast in place anchors (1), comprising: a housing (19) which has an anchor receptacle (11) for receiving a cast in place anchor (1); a nail gun abutment (15) for abutting against a nail gun (50); and a ram (20) which extends into the housing (19) towards the anchor receptacle (11) and which is axially displaceable with respect to the housing (19), wherein the ram (20) has a striking surface (23) facing the anchor receptacle (11) for striking a cast in place anchor (1) disposed in the anchor receptacle (11) and wherein the ram (20) has a striker abutment (25) for abutting against a striker (53) of the nail gun (50) that is positioned at the nail gun abutment (15).

21. The device (10) according to claim 20, wherein the striking surface (23) is disposed at a proximal end (21) of the ram (20) and the striker abutment (25) is disposed at a distal end (22) of the ram (20) and wherein the proximal end (21) of the ram (20) and the distal end (22) of the ram (20), respectively, are opposite ends of the ram (20).

22. The device (10) according to a claim 20, further comprising a ram return spring (17) which rests on the ram (20), wherein the ram return spring (17) biases the ram (20) axially away from the anchor receptacle (11).

23. The device (10) according to claim 20, further comprising an unlocking pushrod (60) which is axially displaceable with respect to the housing (19) and with respect to the nail gun abutment (15), wherein the unlocking pushrod (60) has an anchor probe surface (61) located at the anchor receptacle (11) and a lock abutment (63) for abutting against a proximity plunger (59) of the nail gun (50).

24. The device (10) according to claim 23, wherein the anchor probe surface (61) is disposed at a proximal end of the unlocking pushrod (60) and the lock abutment (63) is disposed at a distal end of the unlocking pushrod (60) and wherein the proximal end of the unlocking pushrod (60) and the distal end of the unlocking pushrod (60), respectively, are opposite ends of the unlocking pushrod (60).

25. The device (10) according to claim 23, wherein the unlocking pushrod (60) has at least one anchor probe pin (62) which penetrates the striking surface (23) of the ram (20) and wherein the anchor probe surface (61) is arranged at the at least one anchor probe pin (62).

26. The device (10) according to claim 23, wherein the unlocking pushrod (60) has at least one guide sleeve (65, 67) and wherein the ram (20) is guidable by the at least one guide sleeve (65, 67).

27. The device (10) according to claim 23, further comprising a ram return spring (17) which rests on the ram (20), wherein the ram return spring (17) biases the ram (20) axially away from the anchor receptacle (11) and wherein the ram return spring (17) rests on the unlocking pushrod (60).

28. The device (10) according to claim 20, wherein the nail gun abutment (15) is axially advanceable towards the housing (19).

29. The device (10) according to claim 20, further comprising an abutment return spring (70), wherein the nail gun abutment (15) is pushable away from the housing (19) by the abutment return spring (70).

30. The device (10) according to claim 20, wherein the ram (20) has a mass ranging from 100 g to 750 g.

31. The device (10) according to claim 20, further comprising a feed tube (80) for feeding cast in place anchors (1) into the anchor receptacle (11), wherein the feed tube (80) is connected to the housing (19).

32. The device (10) according to claim 31, further comprising at least one guide ring (88) that is arranged at the nail gun abutment (15) for axially guiding the nail gun abutment (15) at the feed tube (80), wherein the feed tube (80) extends through the guide ring (88).

33. A system, comprising: the device (10) according to claim 20; and a nail gun (50) having a striker (53), wherein the nail gun (50) is positioned at the nail gun abutment (15) such that the striker (53) faces the striker abutment (25) of the ram (20).

34. The system according to claim 33, wherein the device further comprises a ram return spring (17) which rests on the ram (20), wherein the ram return spring (17) biases the ram (20) axially away from the anchor receptacle (11), and wherein the ram return spring (17) pushes the ram (20) into contact with the striker (53).

35. The system according to claim 33, wherein the striker (53) has a mass ranging from 50 g to 250 g.

36. The system according to claim 33, wherein the nail gun (50) is configured to provide a setting energy of 50 Joules or more on the striker (53).

37. The system according to claim 33, further comprising a cast in place anchor (1) which is positioned within the anchor receptacle (11).

38. The system according to claim 37, wherein a distance between the striking surface (23) and the cast in place anchor (1) positioned within the anchor receptacle (11) ranges from 10 mm to 100 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG. 1 is an exploded view of a system including a nail gun and a device for nailing cast in place anchors to a shuttering, and of a cast in place anchor;

[0039] FIG. 6 is a detail of the view of FIG. 1, showing the proximal ends of the ram and of the unlocking pushrod in detail; and

[0040] FIGS. 2 to 5 show, in partly longitudinally sectional view, subsequent stages of the system in intended use.

DETAILED DESCRIPTION OF THE DRAWINGS

[0041] The figures show an example of a system which comprises, amongst others, a nail gun 50 having a housing 51 and a striker 53 (shown only highly schematically), wherein the striker 53 can be axially fired (i.e., moved explosively axially forwardly) with respect to the housing 51. In the present embodiment, the striker 53 is battery actuated, but this is an example only and other actuation modes can also be envisaged. The nail gun 50 has a trigger 55 which causes the striker 53 to be fired when the trigger 55 is pressed. The nail gun 50 further has a lock mechanism comprising a proximity plunger 59, wherein the lock mechanism prevents the striker 53 from being fired, even when the trigger 55 is pressed, until the proximity plunger 59 is depressed into the housing 51. The lock can thus ensure that the striker 53 is not fired before the striker is located proximate to a working surface. In the present case, the proximity plunger 59 is a sleeve, wherein the striker 53 projects into the proximity plunger 59, at least when the striker 53 is fired.

[0042] The system further comprises a device 10 for nailing cast in place anchors 1 to a shuttering. The device 10 is mechanically connected to the nail gun 50 and comprises a nail gun abutment 15 and a housing 19, which is mechanically connected to the nail gun abutment 15.

[0043] The housing 19 is generally tubular and has an anchor receptacle 11, in which a cast in place anchor 1 can be positioned.

[0044] The nail gun abutment 15 is generally tubular. At least one connector for permanently or, advantageously, temporarily connecting the nail gun abutment 15 to the nail gun 50 is provided on the nail gun abutment 15. This connector could for example include not shown snapping tabs.

[0045] The nail gun abutment 15 and the housing 19 are telescopically nested. In the shown embodiment, the nail gun abutment 15 is nested within the housing 19, but this is an example only, and an arrangement in which the housing 19 is nested within the nail gun abutment 15 is also feasible. The device 10 further comprises an abutment return spring 70. The abutment return spring 70 is a compression spring and can be in particular a helical spring. The abutment return spring 70 is arranged between the housing 19 and the nail gun abutment 15 so as to bias the nail gun abutment 15 away from the housing 19. Accordingly, the abutment return spring 70 rests on one side on the housing 19 and on the other side on the nail gun abutment 15, and the abutment return spring 70 tends to telescope out the arrangement consisting of the nail gun abutment 15 and the housing 19.

[0046] The device 10 further comprises an elongate ram 20, which extends into the housing 19 and into the nail gun abutment 15, and which is axially displaceable with respect to the housing 19 and with respect to the nail gun abutment 15. The ram 20 has a proximal end 21, which is located within the housing 19, namely adjacent to the anchor receptacle 11, and a distal end 22, which is located remote from the anchor receptacle 11, wherein the proximal end 21 and the distal end 22 are opposite ends of the ram 20. The longitudinal axis of the ram 20 extends through the proximal end 21 and through the distal end 22. The distal end 22 of the ram is arranged within the nail gun abutment 15.

[0047] The ram 20 has a striking surface 23 which is intended for striking the cast in place anchor 1 that is arranged within the anchor receptacle 11, so as to nail the cast in place anchor 1 into a shuttering, in particular a wood shuttering, located adjacent to the anchor receptacle 11. The striking surface 23 forms an end face of the ram 20 and is located at the proximal end 21 of the ram 20. The striking surface 23 faces the anchor receptacle 11 and is located adjacent to the anchor receptacle 11. In the present embodiment, the striking surface 23 is generally flat, since the corresponding hitting surface of the cast in place anchor 1 is correspondingly flat, but non-flat geometries of the striking surface 23 can also be envisaged.

[0048] The ram 20 moreover has a striker abutment 25, which is located at the distal end 22 of the ram 20. The striker abutment 25 points away from the anchor receptacle 11. When the device 10 is mounted on the nail gun 50 as intended, the striker abutment 25 faces the striker 53 of the nail gun 50 so that striker 53 can act against the striker abutment 25 to axially drive the ram 20 towards the anchor receptacle 11 when the striker 53 is fired. The ram 20 thus provides an energy transfer mechanism to transfer energy from the striker 53 to the cast in place anchor 1. In particular, the striker abutment 25 can be intended to be placed within the proximity plunger 59 of the nail gun 50, with the proximity plunger 59 being sleeve-like.

[0049] In the present embodiment, the ram 20 comprises a head piece 26, which forms the proximal end 21 of the ram, and on which the striking surface 23 is provided, and an elongate rear piece 27, which forms the distal end 22 of the ram 20, and on which the striker abutment 25 is provided. The head piece 26 and the rear piece 27 are non-monolithic with respect to one another, but mechanically fixed to one another. In the present embodiment, mechanical fixation is achieved by means of at least one transverse bolt, but other connections, such as threaded connections or others could also be envisaged.

[0050] The device 10 further comprises an unlocking pushrod 60, which extends essentially parallel to the ram 20, from the housing 19, in particular from the anchor receptacle 11 into the nail gun abutment 15. The unlocking pushrod 60 is axially displaceable with respect to the housing 19, with respect to the nail gun abutment 15 and with respect to the ram 20.

[0051] The unlocking pushrod 60 comprises an anchor probe surface 61, wherein the anchor probe surface 61 is disposed at a proximal end of the unlocking pushrod 60, wherein the anchor probe surface 61 is located adjacent to the anchor receptacle 11 and wherein the anchor probe surface 61 faces the anchor receptacle 11. The unlocking pushrod 60 further comprises a lock abutment 63, which is disposed at a distal end of the unlocking pushrod 60, and which faces away from the anchor receptacle 11. When the device 10 is mounted on a nail gun 50 as intended, the anchor probe surface 61 faces the proximity plunger 59 of the nail gun 50, so as to be able to depress the proximity plunger 59 so as to unlock the lock of the nail gun 50. The proximal end of the unlocking pushrod 60 and the distal end of the unlocking pushrod 60, respectively, are opposite ends of the unlocking pushrod 60.

[0052] In the present embodiment, the unlocking pushrod 60 comprises at least one elongate anchor probe pin 62 (namely two anchor probe pins, by way of example, in the shown embodiment), projecting at the proximal end of the unlocking pushrod 60. The anchor probe pin 62 penetrates the head piece 26 and the striking surface 23 of the ram 20 and projects towards the anchor receptacle 11. The anchor probe surface 61 is constituted by the end face of the at least one anchor probe pin 62.

[0053] In the present embodiment, the unlocking pushrod 60 further comprises a proximal sleeve 65, which adjoins the at least one anchor probe pin 62, an intermediate tube 66, which adjoins the proximal sleeve 65, and a distal sleeve 67, which adjoins the intermediate tube 66. The intermediate tube 66 thus extends in the middle of the unlocking pushrod 60, i.e., between the proximal end and the distal end thereof and between the proximal sleeve 65 and the distal sleeve 67. The at least one anchor probe pin 62 projects from the proximal sleeve 65. The lock abutment 63 is provided on the distal sleeve 67. The proximal sleeve 65 is transverse bolted to the intermediate tube 66 and the intermediate tube 66 is transverse bolted to the distal sleeve 67.

[0054] The proximal sleeve 65, the intermediate tube 66 and the distal sleeve 67 each surround the ram 20. The proximal sleeve 65 and the distal sleeve 67 each form a guide sleeve for guiding the ram 20, thus supporting the ram 20 against radial buckling when the ram 20 is axially driven by the nail gun 50.

[0055] The abutment return spring 70 surrounds both the ram 20, in particular the rear piece 27 thereof, and the unlocking pushrod 60, in particular the intermediate tube 66 and/or the distal sleeve 67 thereof.

[0056] The device further comprises a ram return spring 17, which biases the ram 20 away from the anchor receptacle 11 towards the striker 53. Due to the action of the ram return spring 17, the striking surface 23 is spaced from the cast in place anchor 1 that is held within the anchor receptacle 11 when the device 10 is in an idle state (shown in FIG. 2) before the nail gun 50 is fired, wherein the spacing is preferably in a range from 10 mm to 100 mm. Additionally or alternatively, due to the action of the ram return spring 17, the ram 20 (with its striker abutment 25) may abut against the striker 53 in the idle state before the nail gun 50 is fired.

[0057] On its one (proximal) end, the ram return spring 17 rests on the unlocking pushrod 60, in particular on the proximal sleeve 65 thereof, and on its other (distal) end, the ram return spring 17 rests on the ram 20, for example on a shoulder ring 29 provided at the rear piece 27 of the ram 20. In the present embodiment, the ram return spring 17 is, by way of example, a coil spring that surrounds the ram 20. The ram return spring 17 extends within the unlocking pushrod 60, namely within the intermediate tube 66 thereof.

[0058] The device 10 moreover has a feed tube 80 for feeding cast in place anchors 1 into the anchor receptacle 11. In the present embodiment, the feed tube 80 extends parallel to the ram 20, but other orientations could also be envisaged. Two guide rings 88 are provided on the nail gun abutment 15, wherein the feed tube 80 extends through the guide rings 88. By means of the guide rings 88, the nail gun abutment 15 is axially guided on the feed tube 80 and thus indirectly axially guided on the housing 19, which is connected to the feed tube 80.

[0059] The device 10 further comprises a reflector prism 95, which is, in the present embodiment, connected to the feed tube 80 by way of example.

[0060] In use, the nail gun 50 is connected to the nail gun abutment 15 of the device 10. A cast in place anchor 1 is fed into the anchor receptacle 11, in particular via the feed tube 80, and the device 10 is placed at a working surface, which is in particular a surface of a shuttering (e.g., a wood shuttering), so that anchor receptacle 11 and the cast in place anchor 1 arranged within the anchor receptacle 11 are located adjacent to the working surface. The resulting configuration is shown in FIG. 2. Intended positioning of the device 10 on the working surface could be assisted by the reflector prism 95.

[0061] The nail gun 50 is then pushed axially towards the working surface and towards the housing 19 resting on the working surface. This will cause the nail gun abutment 15 that abuts against the housing 51 of the nail gun 50 to approach the working surface and further cause the arrangement consisting of the nail gun abutment 15 and the housing 19 to telescope in, thereby compressing the abutment return spring 70. In the process of telescoping-in, the nail gun abutment 15 is guided on the feed tube 80 by means of the guide rings 88.

[0062] The nail gun abutment 15, together with the nail gun 50 resting thereon, approaching the housing 19 with the cast in place anchor 1 located therein will cause the unlocking pushrod 60 to become confined between the cast in place anchor 1 located in the anchor receptacle 11 on the one side and the proximity plunger 59 of the nail gun 50 on the other side. Eventually, the unlocking pushrod 60 abutting on the cast in place anchor 1 at the anchor probe surface 61 will thus depress the proximity plunger 59 at the lock abutment 63, so that the lock mechanism of the nail gun 50 becomes unlocked. The resulting configuration is shown in FIG. 3.

[0063] Subsequently, the trigger 55 is operated and thenow unlockedstriker 53 of the nail gun is thereby caused to be fired, i.e., to be explosively axially advanced towards the ram 20. This causes the striker 53 to hit the striker abutment 25 of the ram 20, which causes the ram 20 to be pushed axially towards the cast in place anchor 1 located in the anchor receptacle 11. Axial advancement of the ram 20 will eventually cause the striking surface 23 of the ram 20 to hit the cast in place anchor 1, which will hammer the cast in place anchor 1 into the working surface. The resulting configuration is shown in FIG. 4.

[0064] After firing of the striker 53 and nailing-in of the cast in place anchor 1, the ram return spring 17 returns the ram 20 back into its original, idle position. The resulting configuration is shown in FIG. 5.

[0065] Finally, the nail gun 50 is released, and the abutment return spring 70 causes the arrangement consisting of the nail gun abutment 15 and the housing 19 to telescope out, thereby bringing the device 10 back into its idle position shown in FIG. 2.