GB2111581A

GB2111581A - Clips for conduits

Info

Publication number: GB2111581A
Application number: GB08229070A
Authority: GB
Inventors: Philippe Pittion; Guy Andre; Gerald Souillard; Espere Jean-Louis J; Bernard Houte
Original assignee: A Raymond
Current assignee: A Raymond
Priority date: 1981-11-05
Filing date: 1982-10-12
Publication date: 1983-07-06
Also published as: JPS5872579U; GB2111581B; FR2515776B1; IT1194912B; ES268501Y; DE8132329U1; FR2515776A1; IT8224029A0; ES268501U

Abstract

A conduit clip comprises a head formed by yokes (1) (2) and a ribbed shank (6) which is extended by an expansible dowel (8). The shank has a longitudinal bore and the dowel has a diametral slot extending to meet the bore. The shank is pressed into a pre- drilled hole in a wall or ceiling, the hole size being such that the shank ribs bend back and grip the hole in the wall. A screw or pin can be pressed through the bore to enter the slot and expand the dowel to improve the grip of the shank particularly in plaster or other relatively soft materials. <IMAGE>

Description

SPECIFICATION Clips for pipes or conduits This invention relates to pipe clips or hard elastic plastics with integral shanks for fixing the clips in previously bored holes in walls, and wherein the shanks are provided with outwardly projecting annular ribs.

Clips of this type are commonly used when installing electric lead conduits, as a means of fixing the conduits to the walls and/or ceilings of a room in a building. The shank is pushed into a previously bored hole in the wall, for example, and the edges of the individual ribs bend in the opposite direction, thereby anchoring the clip firmly in the hole. However, this presupposes that the wall material surrounding the hole has adequate stability of shape, as is the case e.g.

with concrete or brick. But in the case of a hole in plaster or plasterwork, for example, the shank provides little anchorage since the wall of the hole can easily crumble.

To ensure adequate anchoring properties even with such wall material, the invention provides for a longitudinally slotted dowel to be moulded onto the shank. In addition the shank contains a longitudinal bore extending from the wall end of the hanger, to accommodate an expanding element, e.g. a pin or a wood screw for the slotted dowel end.

These measures enables the clip to be fixed either on a hard base such as concrete or on a soft one such as plasterwork or actual plaster. In the first case it is sufficient merely to insert the shank whereas with a soft base the necessary anchoring force can be obtained by driving in a nail or inserting a wood screw. Of course screws may additionally be inserted in concrete walls too if this is desirable to increase the anchoring force.

This may be the case particularly if the conduit has to be fixed to a ceiling.

An embodiment of the invention will now be described by way of example with reference to the accompanying drawings wherein:~ Figure 1 is a side elevation of a clip with a cross-section through the shank and dowel, Figure 2 is a front elevation thereof, Figure 3 shows the clip mounted on a wall with the shank pushed in, Figure 4 shows the same clip on the wall with the shank nailed down, Figure 5 shows the same clip with the shank screwed in, and Figure 6 shows the same clip with the shank screwed in and contracted.

The clip shown in the drawings comprises a head having a lower yoke 1 and an upper yoke 2.

The upper yoke 2 is joined pivotably to the lower yoke 1 at one side by a hinge 3 formed by a thin neck of material between the yokes. A hook 4 is mounted onto the free end of the upper yoke 2.

When the clip is closed over a conduit, this hook engages in an opposed hook 5 at the free end of the lower yoke 1 and joins the two ends positively together.

For the purpose of fixing the clip to a wall 15 (Figure 3), a shank 6 with outwardly projecting ribs 7 is moulded onto the lower yoke 1. The external diameter "D" of the ribs 7 is somewhat larger than the internal diameter "d" of the hole 9 provided in the wall for the clip, so that when the ribs 7 are inserted in the hole 9 their edges bend over in the opposite direction to insertion (see Figure 3), thereby anchoring the shank 6 firmly in the wall 15.

A A longitudinally slotted radially expansible dowel 8 is moulded on to form an extension of the shank 6. In addition-as shown in Figure 1~the shank 6 contains a longitudinal bore 10 extending from the lower yoke 1, its function being to accommodate an expanding element 11, e.g. a pin or a wood screw for the slotted end 8 of the dowel (Figures 4-6).

As shown in the drawings the outer surface of the dowel is provided with diametrically opposed ribs or teeth. As the pin or screw enters the dowel it expands it to press the outer surface against the wall of the hole.

The shank 6 is joined to the base 12 of the clip, which lies against the wall, by a more solid portion 13 of shank. The external surface of this portion extends in a conical shape from the external diameter of the shank 6 to the internal diameter of the hole 9. Sharp edged ribs 14 (Figure 2) pointing in an axial direction are moulded in the conical external surface of the shank portion 13. When the dowel and shank are inserted in the hole 9 in the wall, these ribs dig into the edge 16 of the hole, thereby preventing the inserted shank from twisting therein.

The walls of the shank 6 are thin enough to enable it to contract axially when a screw 11 is tightened therein, as indicated in Figure 6. This is an advantage when, in the case of a concrete wall, the hole 9 has been bored in haste and, or because of an obstacle, has not been made deep enough to take the whole length of the dowel, so that the inserted dowel shank 8 abuts the bottom of the hole before the base 12 of the clip is in contact with the wall. In this case it is possible, by using a slightly shorter screw 1 1 for the lower portion 1 of the clip still to be brought up to the wall 1 5, with simultaneous deformation of the shank 6. This is a further advantage of the invention.

Claims

1. A clip for a pipe or conduit made of hard elastic plastics material having a head to embrace the pipe or conduit with any integral shank for fixing the clip in previously bored holes in walls or ceilings in buildings, wherein the shank is provided with outwardly projecting annular ribs, wherein a longitudinally slotted dowel is moulded onto the shank forming an extension thereof, and the shank and dowel contain a longitudinal bore extending from the face end of the dowel, to receive an elongated expanding element, e.g. a pin or a wood screw for the slotted dowel end.

2. A clip according to claim 1, wherein the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Clips for pipes or conduits This invention relates to pipe clips or hard elastic plastics with integral shanks for fixing the clips in previously bored holes in walls, and wherein the shanks are provided with outwardly projecting annular ribs. Clips of this type are commonly used when installing electric lead conduits, as a means of fixing the conduits to the walls and/or ceilings of a room in a building. The shank is pushed into a previously bored hole in the wall, for example, and the edges of the individual ribs bend in the opposite direction, thereby anchoring the clip firmly in the hole. However, this presupposes that the wall material surrounding the hole has adequate stability of shape, as is the case e.g. with concrete or brick. But in the case of a hole in plaster or plasterwork, for example, the shank provides little anchorage since the wall of the hole can easily crumble. To ensure adequate anchoring properties even with such wall material, the invention provides for a longitudinally slotted dowel to be moulded onto the shank. In addition the shank contains a longitudinal bore extending from the wall end of the hanger, to accommodate an expanding element, e.g. a pin or a wood screw for the slotted dowel end. These measures enables the clip to be fixed either on a hard base such as concrete or on a soft one such as plasterwork or actual plaster. In the first case it is sufficient merely to insert the shank whereas with a soft base the necessary anchoring force can be obtained by driving in a nail or inserting a wood screw. Of course screws may additionally be inserted in concrete walls too if this is desirable to increase the anchoring force. This may be the case particularly if the conduit has to be fixed to a ceiling. An embodiment of the invention will now be described by way of example with reference to the accompanying drawings wherein:~ Figure 1 is a side elevation of a clip with a cross-section through the shank and dowel, Figure 2 is a front elevation thereof, Figure 3 shows the clip mounted on a wall with the shank pushed in, Figure 4 shows the same clip on the wall with the shank nailed down, Figure 5 shows the same clip with the shank screwed in, and Figure 6 shows the same clip with the shank screwed in and contracted. The clip shown in the drawings comprises a head having a lower yoke 1 and an upper yoke 2. The upper yoke 2 is joined pivotably to the lower yoke 1 at one side by a hinge 3 formed by a thin neck of material between the yokes. A hook 4 is mounted onto the free end of the upper yoke 2. When the clip is closed over a conduit, this hook engages in an opposed hook 5 at the free end of the lower yoke 1 and joins the two ends positively together. For the purpose of fixing the clip to a wall 15 (Figure 3), a shank 6 with outwardly projecting ribs 7 is moulded onto the lower yoke 1. The external diameter "D" of the ribs 7 is somewhat larger than the internal diameter "d" of the hole 9 provided in the wall for the clip, so that when the ribs 7 are inserted in the hole 9 their edges bend over in the opposite direction to insertion (see Figure 3), thereby anchoring the shank 6 firmly in the wall 15. A A longitudinally slotted radially expansible dowel 8 is moulded on to form an extension of the shank 6. In addition-as shown in Figure 1~the shank 6 contains a longitudinal bore 10 extending from the lower yoke 1, its function being to accommodate an expanding element 11, e.g. a pin or a wood screw for the slotted end 8 of the dowel (Figures 4-6). As shown in the drawings the outer surface of the dowel is provided with diametrically opposed ribs or teeth. As the pin or screw enters the dowel it expands it to press the outer surface against the wall of the hole. The shank 6 is joined to the base 12 of the clip, which lies against the wall, by a more solid portion 13 of shank. The external surface of this portion extends in a conical shape from the external diameter of the shank 6 to the internal diameter of the hole 9. Sharp edged ribs 14 (Figure 2) pointing in an axial direction are moulded in the conical external surface of the shank portion 13. When the dowel and shank are inserted in the hole 9 in the wall, these ribs dig into the edge 16 of the hole, thereby preventing the inserted shank from twisting therein. The walls of the shank 6 are thin enough to enable it to contract axially when a screw 11 is tightened therein, as indicated in Figure 6. This is an advantage when, in the case of a concrete wall, the hole 9 has been bored in haste and, or because of an obstacle, has not been made deep enough to take the whole length of the dowel, so that the inserted dowel shank 8 abuts the bottom of the hole before the base 12 of the clip is in contact with the wall. In this case it is possible, by using a slightly shorter screw 1 1 for the lower portion 1 of the clip still to be brought up to the wall 1 5, with simultaneous deformation of the shank 6. This is a further advantage of the invention. Claims

2. A clip according to claim 1, wherein the shank is joined to the wall abutting part of the head, by a conical portion having its maximum external diameter adjacent the head and for the purpose of fixing the shank portion in position in the edge of the hole in the wall so that it cannot twist, longitudinal sharp edged ribs are moulded into its conical outer surface.

3. A clip according to claim 1 or 2, wherein the shank is constructed with thin walls between the conically widened shank portion and the dowel.

4. A clip according to any of the preceding claims wherein the outer surface of the dowel is provided with teeth.