MXPA00009699A - A tool ring and a nail machine comprising such tool ring - Google Patents

Abstract

The invention provides a nail machine and a tool ring for securing preferably elongate bodies in a nail machine, e.g. for the manufacture of heads on said elongate bodies, said tool ring having an axis of rotation, an outer circumference and a surface that extends substantially perpendicular to the axis of rotation, and wherein the tool ring further comprises a number of engagement devices intended for receiving and releasably securing bodies, and which are spaced substantially equally apart at the circumference of the tool ring, said engagement devices each comprising two mutually opposed holding jaws;and wherein at least the one of the two holding jaws is/are movable, it being arranged on a movement mechanism so configured that the holding jaw can be displaced towards and away from, respectively, the opposed holding jaw;and wherein the movement mechanism is so arranged that it displaces the holding jaw completely or partially in a radial or axial direction relative to the axis of rotation of the tool ring. Hereby the productivity obtained with a given machine comprising a tool ring with a given number of tools is increased.

Description

TOROIDAL TOOL AND MACHINE TO MANUFACTURE NAILS THAT COMPRISES SUCH TOROIDAL TOOL DESCRIPTION OF THE INVENTION The present invention relates to a toroidal tool for securing preferably elongated bodies, for example, for the manufacture of heads in elongated bodies, the toroidal tool has an axis of rotation, an outer circle and a surface that is extends substantially perpendicular to the axis of rotation; and wherein the toroidal tool further comprises a number of coupling means accommodated to receive and secure the body and separated substantially equally in the circumference of the toroidal tool, each of the coupling means comprises two clamping jaws. mutually opposite, and wherein at least one of the clamping jaws is accommodated on a movement mechanism which is accommodated so that the clamping jaw can move towards and away from the opposing clamping jaw respectively. Such a toroidal tool is known among other things from the Danish patents Numbers 143 935 and 163 111. The toroidal tool is used in these machines for the manufacture of nails, wherein the toroidal tool is suspended rotationally around the axis of rotation of the toroidal tool opposite to a wire cutter used to cut elongated wire bodies from a wire storage and to alternate the elongated bodies forward to receive and secure the toroidal tool. The toroidal tool is arranged opposite to the second toroidal tool, the circumference of which corresponds to this toroidal tool, although it is not provided with the coupling means. This second toroidal tool is also rotatably suspended around an axis of rotation that is substantially coaxial with the axis of rotation of the first toroidal tool, whereby an elongated body accommodated between the toroidal tools is secured between them, in that area where the distance between the toroidal tools is relatively small, and wherein the elongate body is loosened between the toroidal tools on the substantially opposite side of the toroidal tools.

In this context, the term "nail" is used to designate any object that has an axis that, at one of its ends, has a head. In the area where the elongated body is secured between the two toroidal tools, the wire body is so well secured that it is possible to forge or roll a head on one end of the wire body, and for this purpose the toroidal tools are, in each coupling means, provided with a plurality of opposed pairs of retainer reservoirs made of an extremely wear resistant material and each having a groove for receiving the elongated body. In this place the coupling means in the toroidal tool serves to engage with the elongate body and to be secured in the position in such a way that with a high degree of certainty the body will be correctly placed in the groove in the retainer tanks when the retainer tanks enclose the elongated body. In this way, the machines for manufacturing known nails work by the toroidal tools that are rotated synchronously around their axes of rotation, so that the individual pairs of retainer tanks are transported successively beyond the inserting wire cutter. an elongate body between the toroidal tools, each of the coupling means engaging with and placing an elongate body between the two toroidal tools, followed by a head that is wound onto the end of the elongated body, and where the toroidal tools subsequently release the elongated body in the shape of a nail or the like. It is a problem that these prior art nailing machines control and synchronize the wire cutter to ensure that the individual elongated bodies are reliably inserted between the clamping jaws in each of the coupling means, the clamping jaws are arranged in or radially opposite the space between the toroidal tools. With practice, this means that the rotation speed of the toroidal tools is restricted by the need to introduce an elongated body during that period of time when the coupling means are directly positioned opposite to the wire cutter, and so that the productivity can be increased in a given nailing machine only if the number of retainer tanks with the coupling means as a whole is increased. With practice this means that the known toroidal tools typically contain about 20 to 40 sets of retainer tanks and coupling means as a whole. In light of this, it is the object of the present invention to provide a toroidal tool that allows a higher degree of freedom when entering to obtain a desired productivity in a given nail making machine without necessarily implying that a given number of retaining deposits with Joint coupling means are required. This is obtained by the use of a toroidal tool as described in the introductory part and is characterized in that the movement mechanism for moving at least one of the clamping jaws is configured in such a way as to displace the complete clamping jaw or partially in a radial or axial direction relative to the axis of rotation of the toroidal tool. Opposed to the known toroidal tools, and provided to the toroidal tool, it is rotated in such a way that the movable clamping jaw of each pair of clamping jaws is located opposite to the opposite clamping jaw in the direction of rotation of the toroidal tool, this allows the elongated body to advance to the toroidal tool to occupy a position in which the elongated body can be held by the clamping jaws in the coupling device before the coupling means becomes to place opposite to the wire cutter. This means that at a given speed of rotation by the toroidal tool, more time is available to introduce the elongated body, thereby eliminating or at least considerably reducing the limitation imposed previously described in the productivity that can be obtained with a given toroidal tool having a proportionate number of retainer deposits and coupling means as a whole. According to a particularly preferred embodiment of the invention, undesirable variations in the positioning of the individual elongated bodies are achieved due to the interpretation if any, in the movement mechanisms of the coupling means, they are eliminated or at least they are considerably reduced by one of the clamping jaws in the coupling means that are firmly secured to the toroidal tool, and by the toroidal tool that is configured for rotation in the direction in which the clamping jaw is immovable in each half of The coupling is positioned opposite to the securely clamped clamping jaw. Advantageously, the coupling means is arranged to receive and secure the elongated bodies in such a way that the elongated bodies extend completely or partially opposite the surface of the toroidal tool which is arranged substantially perpendicular to the axis of rotation, and substantially in radial shape inwards and towards the axis of rotation of the toroidal tool and wherein the movement mechanism is configured so as to move the movable clamping jaw completely or partially in a direction that is axial in relation to the axis of rotation of the tool toroidal By this means it is achieved that the individual elongated bodies can be introduced radially between the toroidal tool according to the present invention and a second toroidal tool accommodated in opposite manner as described in the above with reference to the prior art nail making machines. . According to a reliable and particularly simple mode, each of the movement mechanisms in the toroidal tool is configured so that it comprises an axis that is rotatably accommodated in the toroidal tool; and the movable clamping jaw is accommodated on a lever that is secured to the axis of the movement mechanism and extends radially therefrom; and a cam pusher is also mounted on the rotary shaft. By this means a movement mechanism is set to comprise only a rotating seat of the movement mechanism whereby a mechanism which is relatively maintenance free is provided. The cam pusher is advantageously driven by a spring to move the movable jaw against the opposite jaw. Therefore no adjustments are needed to produce nails from wires having different diameters. According to a preferred embodiment, the toroidal tool is configured in such a way that the rotational axis of the movement mechanism is arranged so that its axis of rotation points radially substantially inward toward the axis of rotation of the toroidal tool. By this means a pattern of movements is obtained by the movable clamping jaw which is secured in its position close to the clamp opposite clamping, the movable clamping jaw moves substantially in a direction perpendicular to the opposite clamping jaw. According to a particularly preferred embodiment, the toroidal tool has such a configuration that the clamping jaw firmly secured has a substantially flat clamping surface facing in the direction of rotation of the toroidal tool; and that the movable clamping jaw has a substantially flat clamping surface essentially facing towards the securely clamped clamping surface. With this, it is possible to properly secure the elongated bodies that ensure that the bodies are correctly positioned. Furthermore, the present invention relates to a machine for manufacturing nails comprising a toroidal tool according to the following, wherein a machine for manufacturing nails is characterized in that it comprises a driving device for pushing a metal wire from a storage, a device for lengthening and straightening the wire, a cutter for cutting desired lengths of elongated wire bodies, means for introducing the elongated bodies within the toroidal tool, a roller for winding heads on the elongate body, and means for removing and collecting the elongated bodies provided with heads and to transport the elongated bodies away from the machine to manufacture nails. The present invention will now be described in more detail with reference to the drawings, wherein: Figure 1 is an explanatory outline in perspective of a prior art nail making machine which is known in principle and provided with a toroidal tool according to the invention. with the present invention; Figure 2a is a cross-section of a section of a toroidal tool according to the invention, radially from the outer side of the toroidal tool; Figure 2b is a front view tracing of the embodiment shown in Figure 2a of a toroidal tool according to the invention; Figure 2c is a stroke of the embodiment of the toroidal tool shown in Figures 2a and 2b, viewed from the center of the toroidal tool and radially outwardly to the side; Figure 3 is a sectional view along line A-A in Figure 2b; Figure 4a is a line illustrating a sectional view of a first alternative embodiment of a toroidal tool according to the invention, viewed radially from the outer side of the toroidal tool; Figure 4b is a line illustrating a front view of the embodiment of a toroidal tool according to the invention shown in FIG.

Figure 4a, but where the ring has been straightened for space considerations.

Figure 4c is a trace illustrating the embodiment of a toroidal tool shown in Figures 4a and 4b as seen from the center of the toroidal tool and radially outwardly to the side. Figure 5a is a line illustrating a sectional view of a second alternative embodiment of a toroidal tool according to the invention, seen radially from the outer side of the toroidal tool. Figure 5b is a line illustrating a front view of the embodiment of a toroidal tool according to Figure 5a. Figure 5c is a trace showing the mode of a toroidal tool in Figures 5a and 5b, seen from the center of the toroidal tool and radially outward to the side. Figure 6a is a line illustrating a sectional view of a third alternative embodiment of a toroidal tool according to the invention, seen radially from the outer side of the toroidal tool. Figure 6b is a line illustrating a front view of the mode of a toroidal tool according to Figure 6a.

Figure 7 is a line showing the means for introducing the elongated bodies to the toroidal tool. In this way. Figure 1 illustrates a machine 1 for manufacturing nails comprising an elongation station 2, through which an arrangement of impeller rollers 4 serves to push a metal wire 3 from a spool of wire not shown, and where the metal wire is thereby hardened and elongated to a substantial and completely straight piece of wire. After the impeller rollers 4, the metal wire is moved in a wire cutter consisting of rotating wire cutters 5, and from the rotary cutters 5 the wire parts 6 cut the wire 3 which is placed inside a tool 7. toroidal that rotates clockwise in the mode shown here. The individual pieces of wire are secured and placed by an impeller 8 intended therefor, whereby the pieces of wire are caused to extend at equal distances towards the center of the ring. In the lower area of the toroidal tool, an impeller 9 is thus arranged, it is configured to cooperate with the driving tool 7 for the heads rolled on the individual pieces of the wire 6. The wire parts provided with heads are subsequently advanced. e in the toroidal tool and upwards to the uppermost part of the toroidal tool 7, where the piece of wire provided with head is released from the toroidal tool and falls on a ramp 10 that transports the piece of wire away from the machine to make nails. The aforementioned tool machine and its functionality are generally known, and the present invention relates specifically to a toroidal tool that distinguishes itself by increasing the productivity relative to the number of tools accommodated in the toroidal tool compared to the other devices. the prior art. Thus, the following figures illustrate specific embodiments of the invention in the form of toroidal tools that can, in principle, be used successfully together with the machine shown in Figure 1. In this way, Figures 2, 2b and 2c delineate a first embodiment of a toroidal tool 7 according to the invention, wherein Figure 2a is a sectional view of an embodiment of a toroidal tool according to the invention, viewed radially from the outside of the toroidal tool. In this way, three identical clamping jaws will be shown, each one comprising a clamp Ia, llb, 11c, respectively clamped, mounted on the toroidal tool 7 and a second clamp 12a, 12b, 12c, movable clamping device. they can rotate around an axis perpendicular to the plane of the paper. The clamping jaw 12a is shown in the position it occupies before the clamping jaws 12a and 12a which are opposite the point where a piece of wire 6 is inserted towards the toroidal tool 7. How it will appear, according to the present invention, the clamping jaw 12a movable in this position is displaced axially with respect to the axis of rotation of the toroidal tool so that it is extracted below the plane defined by the surface 13 of the toroidal tool 7, so that A wire cutting piece 6 can be inserted into the toroidal tool through the surface 13 of the toroidal tool 7 just long enough so that the movable jaw can pass the piece of wire 6 without touching it.

The clamping jaws 11b and 12b are subsequently shown in a second position, followed by the insertion of a piece of wire 6 into the toroidal tool 7, and wherein the movable clamping jaw 12b has been pivoted to press the piece of wire 6 towards clamp llb fixed clamping. Finally, the same position is shown illustrated in the clamping jaws 11c and 12c. Now Figure 2b illustrates the same positions as shown in Figure 2a, only as front views on the toroidal tool 7, perpendicular to the surface 13. The arrow A in Figure 2b illustrates the direction of rotation of the toroidal tool. It will further appear that the clamping jaws 12a, 12b, and 12c are moved by means of a cam device 14 mounted on the structure of the machine for manufacturing nails and the respective cam followers intended for each of the jaws 12a, 12b , and clamping 12c in the form of a roll 15a, 15b, 15c. The principle behind the movement mechanism shown will now be described in more detail below with reference to Figure 3.

Figure 2c also illustrates the same positions of the clamping jaws as seen in Figures 2a and 2b, although viewed from the center of the toroidal tool 7 and radially outwardly. In this place the cam device is seen in a side view; and it will appear that the cam device has a ramp 16 which carries out the movement that the movable clamping jaws performs from the position illustrated in the clamping jaw 12a in Figure 2a to the position illustrated in the clamping jaw 12b. Now, Figure 3 illustrates one embodiment of the movement mechanism of the movable clamping jaw 12a, 12b and 12c shown in Figures 2a to 2c. A piece of wire 6 is shown which has been inserted between the toroidal tool 7 according to the present invention, and a second tool 17 toroi da 1 opposite. In the toroidal tool 7, a retainer reservoir 18 is accommodated which is provided with a slot 19, and in a similar manner a corresponding retainer reservoir 20 with a slot 21 is accommodated in the opposite toroidal tool 17, and the two reservoirs 18 and 20 retainers are, tightened during the rotation of the tools 7, 17 toroidal 1 together with great force around the piece of wire 6, and therefore the use of such toroidal tools presupposes an additional coupling device for gripping and placing the piece of wire relative to the grooves 19, 21 in the deposits 18, 20 retainers The coupling device shown in Figure 3 corresponds to that shown in Figures 2a to 2c and, as mentioned, together with the Figures, presents a fixed clamping jaw (not shown in Figure 3) and a movable clamping claw 12b accommodated in a lever 22 extending radially outwardly from a first end of a shaft 23 which is pivotally mounted in the toroidal tool 7. At the other end the shaft 23 the cam pusher is accommodated to comprise a cam roller 15c extending over a cam device 14 arranged along the internal periphery of the toroidal tool 7. Between the cam pusher 23 and the toroidal tool 7, a torsion spring 24 is accommodated which is biased so that it constantly aims to keep the cam pusher in splice on the cam device, and to push the clamp jaw 12c away of its opposite fixed clamp 11c. In addition, the cam pusher is accommodated with the cam roller 15c to rotate about the axis 23; and between the cam pusher and the shaft, a torsion spring is accommodated, the torsion spring is deflected in a manner that seeks to bias the clamping jaw 12 towards its opposite clamping jaw 11c. In this way, a movement mechanism is provided, which serves to provide, during most of its range of motion, a rigid transmission of force between the cam pusher and the clamping jaw.; and wherein the torsion spring 24 works alone. However, an impact spring 25 is accommodated by having a spring constant that substantially exceeds the spring constant of the torsion spring 24; and wherein it is the sole purpose of the impact spring 25 to ensure that the joint pressure between the clamping jaws 11c and 12c and the piece of wire 6 is limited, since the cam pusher is able to rotate relative to the axis 23 against the spring force of the impact spring. Now, Figures 4a to 4c illustrate an alternative embodiment of the present invention wherein Figure 4a is a front view outline illustrating a section of a first alternative embodiment of a toroidal tool according to the invention viewed radially from the outer side. of the toroidal tool; and Figure 4b is a line illustrating a front view of the embodiment of a toroidal tool according to the invention shown in Figure 4a, but where the ring has straightened for space reasons; and Figure 4c is a trace illustrating the embodiment of a toroidal tool shown in Figures 4a and 4b, viewed from the center of the toroidal tool and radially outwardly to the side. Thus, Figure 4a illustrates a toroidal tool 7 with an alternative configuration of the movement mechanism for the clamping jaws: the toroidal tool is accommodated to rotate in the direction indicated by the arrow B, and it will appear that this configuration is accommodated so that each one of the clamping jaws of a coupling device is arranged to move relative to the toroidal tool 7. The clamping jaw 26 is accommodated in a parallel guide from s p 1 to z and the clamping jaw 27 is pivotally accommodated in a support in the toroidal tool 7. In accordance with the principle behind the invention, the two clamping jaws 26 and 27 can be partially moved axially relative to the axis of rotation of the toroidal tool, and the pattern of movement of the clamping jaws 26 and 27 is illustrated by five different positions by means of a toothed wheel 28 accommodated in the toroidal tool 7 and cooperating with a toothed bar accommodated on the clamping jaw 26, and an annular toothing in the clamping jaw 27, whereby both jaws 26 and 27 can be moved by means of one and the same gear. As will appear from Figure 4a, the clamping jaw 27 thus moves downwardly from the surface 13 in the toroidal tool 7 -in those positions where the piece of wire 6 is inserted into the toroidal tool 7, it will appear from Figure 4b. With this, the piece of wire 6 can, according to the effect of the present invention, be introduced for a relatively long period of time without making contact with the clamping jaw 27. As will appear from Figure 4c, the toothed wheel 28 is activated as a consequence of a cam pusher and a cam device being provided on the internal periphery of the toroidal tool 7 which, in principle, corresponds to the device shown in FIGS. Figures 2b and 2c. In Figures 5a to 5c there is further illustrated a second alternative embodiment of the present invention comprising a toroidal tool 7 having an additional alternative construction of the movement mechanism for the movable jaw 29. As can be seen from the Figures, the movement mechanism comprises a cam 14, a number of jaws 29 that are arranged pivotally on an axis and where each axis has a cam pusher 15 for coupling the cam 14, so that take stationary opposite and stationary clamp 31 to a closed and open position respectively. A compression spring 30 is mounted to engage the cam pusher 15 to urge the movable jaw to its closed position in the press against the opposite stationary jaw 31. Thus, the compression spring provides the clamping force for clamping the long bodies between the jaws 29, 31 and therefore no specific adjustments are necessary to adjust the production between, for example, nails from the wires having different diameters. Figures 6a and 6b show a third alternative embodiment of the invention, in which the movable jaw does not move axially below the surface of the toroidal tool 7, although as an alternative solution it is rotated about an axis that is substantially parallel to the axis of rotation of the toroidal tool. In Figure 7 a preferred embodiment of the invention is described in which the elongated bodies are inserted into a toroidal tool 7, and wherein the means for introducing the elongate body comprises a rotary cutter having two cylinders 34 of rotary cutters. for cutting the elongated bodies 6 from a wire 35. From the cutter cylinders 34, the elongate bodies are advanced between a number of pairs 36 of rotating rolls, and the rotating roller pairs are rotated in one direction to accelerate the elongated bodies 6 for advancing the bodies 6 al ^ ated in the toroidal tool 7. As can be seen from the Figure, the pairs of rotating rolls are only coupled to the elongated bodies at a single point when the elongated bodies are relatively short. This results in the problem that the elongated bodies can not insert correctly in the toroidal tool, and with this the risk of severe damage to the machine to manufacture nails. In the embodiment described in Figure 7, this is not allowed by the use of a guide surface 37 for the elongate bodies, the guide surface has an angle with respect to the axis of rotation of the pairs 35 of rotating rollers being different from 90 °, so that the pairs of rotating rollers cause the elongated bodies to be pressed and slide against the guide surface, and with this the elongated bodies are stabilized. Obviously, the present invention can be practiced in other ways than those shown as preferred embodiments in the drawings and explained in the foregoing. In this way, the invention is also useful in conjunction with machines for manufacturing nails equipped with other types of wire cutters, etc. As a consideration, the clamping jaws may also have a configuration that is different from those shown herein, although for their movement pattern to include at least one axial and radial movement constant.

Claims (10)

1. CLAIMS 1. Toroidal tool for securing preferably elongated bodies in a machine for example, for the manufacture of heads in elongated bodies, the toroidal tool has a rotation axis, an outer circumference, and a surface extending substantially perpendicular to the axis of rotation. rotation; and wherein the toroidal tool further comprises a number of coupling devices configured to receive and secure 1 rabbi bodies, and equally separate in the circumference of the toroidal tool, the coupling devices each comprising two clamping jaws, each having clamping faces, and wherein at least one of the two clamping jaws can be moved as it is placed on a movement mechanism which is configured so that the movable clamping jaw can move towards and away from the clamp of opposing clamping in a closed and open position respectively, characterized in that the movement mechanism is configured to move the movable clamping jaw to its open position completely away from the area opposite the clamping face of the opposite jaw in its closed position .
2. 2. Toroidal tool according to claim 1, characterized in that the opposite clamping jaw is firmly secured in the toroidal tool; and in that the toroidal tool is arranged to rotate in such a direction that the movable holding jaw in each coupling device is positioned opposite the opposite clamping jaw securely secured.
3. 3. Toroidal tool according to the rei indication 1 or 2, characterized in that the coupling device is configured to receive and secure the elongated bodies in such a way that the elongated bodies extend completely and partially opposite the surface of the toroidal tool that is placed substantially perpendicular to the axis of rotation and substantially radially inward toward the axis of rotation of the toroidal tool; and wherein the movement mechanism is arranged to move the movable holding jaw completely or partially in a direction that is axial relative to the axis of rotation of the toroidal tool.
4. 4. Toroidal tool according to claim 1 6 2, characterized in that the movable jaw moves completely or partially in a direction that is radial with respect to the axis of rotation of the toroidal tool.
5. 5. Toroidal tool according to claim 1, 2, 3, or 4, characterized in that each movement mechanism in the toroidal tool comprises an axis that is rotatably accommodated in the toroidal tool; and in that the movable clamping jaw is accommodated in a lever that is secured to the axis of the movement mechanism and extends radially outwardly therefrom; and in that the rotating shaft is further provided with a cam pusher.
6. 6. Toroidal tool according to claim 5, characterized in that a spring is arranged between the axis in the movement mechanism and the toroidal tool so that the spring force of the spring constant has as its goal to drive the movement mechanism for which rotates in such a way that the movable clamping jaw moves in its closed position.
7. 7. Toroidal tool according to any of claims 4 to 6, characterized in that the rotational axis of the movement mechanism is arranged so that its axis of rotation extends substantially radially inward toward the axis of rotation of the toroidal tool.
8. 8. Toroidal tool according to any of the preceding claims 2 to 7, characterized in that the clamping jaw firmly secured has a clamping surface facing in the direction of rotation of the toroidal tool; and in that the movable clamping jaw has a clamping surface which, in the closed position of the movable jaw, substantially confronts the clamping surface firmly secured.
9. 9. A machine for manufacturing nails comprising a toroidal tool according to any of the preceding claims, characterized in that it comprises a driving device for pushing a metal wire from a storage; a device for lengthening and straightening the wire, a cutter for cutting elongated bodies having a desired length outside the wire; means for introducing the elongated bodies in the toroidal tool; a roller for rolling heads over the elongated bodies; and means for removing and collecting the elongated bodies provided with heads and for transporting the elongated bodies away from the machine for manufacturing nails.
10. 10. Machine for manufacturing nails according to claim 9, characterized in that the means for introducing the elongated bodies in the toroidal tool comprises a guide surface and a number of pairs of rotating rollers having a rotation axis different from 90 °, so that move the elongated bodies simultaneously along and against the guide surface. SUMMARY The present invention provides a machine for manufacturing nails and a toroidal tool for securing preferably elongated bodies in a machine for manufacturing nails, for example, for the manufacture of heads in elongated bodies, the toroidal tool has a rotation axis, a circumference outer and a surface extending substantially perpendicular to the axis of rotation, and wherein the toroidal tool further comprises a number of coupling devices intended to receive and secure the bodies, and which are substantially separated from one another. same in the circumference of the toroidal tool, each of the coupling devices comprises two mutually opposite clamping jaws; and wherein at least one of the two clamping jaws is movable, being accommodated on a movement mechanism configured so that the clamping jaw can move towards and away from the opposite clamping jaw, respectively; and wherein the movement mechanism is arranged to move the clamping jaw completely or partially in a radial or axial direction relative to the axis of rotation of the toroidal tool. This increases the productivity obtained with a given machine comprising a toroidal tool with a given number of tools.