JPH0352735A - Conveyor for transferring long and narrow work such as wire segment - Google Patents

Abstract

PURPOSE: To make it possible to intermittently, rapidly, continuously and correctly supply workpieces by immovably bringing the belt sides of two transporting belts into contact with the workpieces transported by these belts on both sides and forming at least one belt of a toothed belt. CONSTITUTION: The horizontal belt sides on the lower side of the endless toothless belt 12 on an upper side are guided along an upper guide plane 18 coinciding with the belt width in horizontal guide devices 14 on the upper side having a perpendicular guide plane 16 on the side lower by the size from the bottom to the rear surface of the belt. The belt sides of the toothed belt 12 are arranged at one end of the guide devices 14 and are turned up by plural toothed disks or smoothly constituted disks. The second lower endless toothed belt 28 is guided on a toothed surface facing up in guide devices 30. The endless toothed belts 12 and 28 may be separately and intermittently driven by controllable servo motors of a stepwise feeder.

Description

Detailed Description of the Invention [Field of Industrial Application] 8 10 (4) The present invention relates to an apparatus according to the generic concept of claim 1. [Prior Art] Such a device for guiding a needle, a wire shank, etc. to a processing tool, particularly a polishing tool for removing marking burrs produced during marking and drilling of needle holes, is disclosed in German Democratic Republic Patent No. It is disclosed in the specification of No. 41141. For this purpose, the workpiece is moved perpendicular to the longitudinal axis by means of an elastic circular conveyor belt, on which is riveted an elastic clamping device with two or more pawls at intervals. , these clamping devices automatically open and close for receiving and handing over the workpiece upon deflection of the conveyor belt, after which the workpiece is clamped and passed by the tool. The supply to and discharge from the clamping device takes place by means of a supply or discharge device. 6. In order to maintain the correct working position of the workpiece during feeding into the clamping device, a spring element is additionally provided. (5) With this known device, the workpiece to be machined can only be continuously passed past the machining tool for the grinding process, with the elastic conveyor belt being able to carry out the machining of the tool onto the workpiece. Deflects due to pressure. Therefore, positionally accurate step-by-step guidance of parts cannot be performed. Furthermore, the jaws of the clamping device must be matched in shape and size to the diameter of the workpiece. [N Problems to be Solved by the Invention] The problem on which the invention is based is to intermittently and quickly continuously carry out one or more wire segments within a diameter and length range as large as possible by the same conveying means. The object of the present invention is to provide a conveying device that can be used as widely as possible and can supply positionally correct processing to multiple processing locations located side by side. [
[Means for Solving the Problem] Starting from a device of the type mentioned at the outset, the invention provides that the two belt sides of two conveyor belts running together and side by side are Between the processing stations, the workpiece (6) to be transported is guided so that the belt sides are in immovable contact on both sides, and at least one of the two conveyor belts is a toothed belt, this toothed The tooth gap in the belt is solved by supporting the workpieces individually. The parallel belt sides of two toothed belts can be arranged so that the teeth face each other, i.e. tooth points towards tooth, and the belts thus circulate in a plane symmetrical manner with respect to each other, or the parallel belt sides of one or the other belt side can be The teeth can be placed slightly offset, and in some cases, the teeth on one belt side can be placed over the tooth groove on the other belt side. In a variant, both belt sides run in the same position, so that the teeth on both belt sides are directed upwards, for example. In all four cases the belt spacing is adjustable. These toothed belts are brought close to each other in such a way that the wire segments are held tight during transport by the tooth surfaces of at least one of the toothed belts. Due to the above-mentioned mounting variant of the toothed belt, wire pieces of any diameter within the working range of the processing machine (7) can be conveyed positionally correctly and quickly with one belt dimension. These advantages make it possible for the conveying device according to the invention to be used, for example, in automatically operated nail-making machines, with high accuracy, as required for trouble-free operation of these nail-making machines. It can be used in equipment for manufacturing precision wire pins with a wire pin head shape and size. Furthermore, the conveying device may be part of a device for producing workpieces which require a multi-stage swaging process, for example in a multi-stage press. In this example of use, too, the conveying device operates precisely so that the material to be processed passes through all forming stations arranged next to each other, each with a clamping device and a swaging device, in a reliable and immovable manner. Maintain the operating position as much as possible. The device can therefore be used wherever a precise step-by-step transport process is important. [Embodiments] (8) The present invention will be described in detail below with reference to two preferred embodiments shown in the drawings. 1st Embodiment and its Modifications FIGS. 1 and 2 show an upper endless toothed belt l2 as a conveyor belt, on the side where the lower horizontal belt side is slightly lower than the dimension from the bottom of the teeth to the back surface of the belt. It is guided along an upper guide surface l8 whose width corresponds to the width of the upper horizontal guide device @14 which has a vertical guide surface 16 on one side. The upper guide device 14 has two identically constructed holders 2
0, these holders are height adjustable with slits. The holding body 20 is the machine body 24
It is attached to. The illustrated belt edge of the toothed belt 12 is directed upwardly by a plurality of toothed disks or smoothly constructed disks, not shown, which are arranged at one end of the guiding device 14 and in the vicinity of this guiding device. He was forced to convert to Furthermore, as an additional conveying belt, the upper horizontal belt side of the second lower endless toothed belt 28 has an upwardly facing toothed surface, which corresponds to the device l4 in plan (9) and is configured in the same way. Guide device 30
It is guided within. This belt side is forced to turn downward. The guide device @3o is a height-adjustable holder 32
It is attached to. The endless toothed belts l2 and 28 are operated together by an electrically driven stepwise feed via a gear transmission and toothed discs or deflection discs or, depending on the desired conveying speed, by a controllable servo motor. They can be driven intermittently together or separately by respective controllable servomotors in the same running direction corresponding to the desired transport direction. Holder 2
0 and 32 (FIG. 1), the front parts 4o and 42 of the upper or lower lever or carriage of a tightening device 44, for example of a wire pin manufacturing machine, are arranged. On the tool support 46 of the front part 40 or 42 of each lever or carriage, an identically configured claw-like tightening tool 48 for tightening the wire pin blank 52 is adjustably mounted. Furthermore, FIG. 2 shows the swaging tool 60 of the swaging device (10) of the above-described apparatus for integrally forming the head 54 on the wire pin material 52. Swaging tool 60
is centrally arranged with respect to the toothed belt pair 12.28 in front of the tightening tool 48. The machine body 24 is provided with a trapezoidal groove 26 along the entire length of the transport section, through which the bottle stock 52 and the finished wire pin 58 can be passed. On the left side of FIG.
It is supported by a swingable hook. On the tool support of each lever 66 or 68 is provided a cutting tool 72 of the same construction for cutting the wire and sharpening the wire pin blank 52 into a pyramidal shape. Both guide devices l4 and 30 end at a short distance in front of the cutting tool 72, while the toothed belt 12
The lower or upper belt edge of and 28 extends slightly beyond the cutting tool 72 and both belt edges are deflected upwardly or downwardly. Guide devices l4 and 3 on the right side of the device in FIG.
The length of 0 is the length of the clamping and threads (
l1) Concerning the number of operating locations for the engulfing operation and the method of derivation of the produced bottles. If the conveying device is part of the wire pin preparation equipment shown schematically in Figures 1 to 6 of the drawings, the sequence of operations is as follows. Although not shown, a known drawing device draws the wire from the wire coil through the straightening device and removes only as much wire as is needed for the desired wire pin length and for forming the wire bin head. (from the plane of the drawing in FIG. 1) the opened cutting tool 72 and the toothed belt 1
2 and 28 into the lower or upper belt side. The opposingly acting cutting tool 72 now cuts the wire by the oscillating movement of the cutting levers 66 and 68, resulting in a pyramid-shaped wire tip 56. During the insertion of both belt sides and the cutting of the line, the intermittent drive of the toothed belt pair 12.28 is stopped. After that, it is stopped again due to intermittent drive (12). This is the cut pin material 5
2 is located between both clamping claws 48 of the clamping device 44. The lines to be cut can be introduced into the tooth grooves 76 and 78 of the mutually opposite teeth 80 and 82 of the toothed belts l2 and 28 according to FIG. 28 into the tooth grooves 78 of the upper belt side and into contact with the tooth heads 86 of the belt side teeth 80 of the upper toothed belt 12, or alternatively the relative longitudinal arrangement of the toothed belts 12 and 28. Depending on the situation, it can be introduced into the tooth groove 78 on the belt side of the lower toothed belt 28 and in contact with the toothed belt back surface 84 on the belt side of the upper toothed belt 12 (FIG. 6). When manufacturing and transporting pins with different wire diameters, the distance between both parallel belt sides should be
All you have to do is change it by moving it closer or farther apart. In this case, the guide devices 14 and 30 are moved together (see FIG. 3 (13) and partial views a and b of FIG. 6). If this change in linear diameter exceeds the range obtained by this belt arrangement in FIG. Now facing in the same direction, i.e. upwards (6th
figure). This makes it possible to reliably transport bottles with smaller wire diameters. With the device according to FIG. 4, the wire diameter is approximately the same as in the case of loading according to FIG. The conveyance can be carried out by being shifted and driven intermittently by a predetermined distance in the conveying direction, in this embodiment leading. In this case, the pin material 52 is pressed by the left tooth surface of the tooth 80 on the belt side of the upper toothed belt l2 to the right tooth surface of the tooth 82 on the belt side of the lower toothed belt 28, and is thus securely tightened. , transported in stages. The operation is performed as shown in FIG.
If the toothed belt 28 is shifted in advance relative to the teeth 82 of the lower toothed belt 28 until it overlaps with the toothed belt l2
This eliminates the need to change direction. The bottle material 52 is pressed against the adjacent flanks of the teeth 82 of the lower toothed belt 28 by the tooth heads 86 of the teeth 80 of the upper toothed belt l2. In the configuration according to FIG. 3, the pin blank 52 is clamped between two mutually adjacent flanks of the teeth 80 and 82 of the two toothed belts l2 and 28. In the configuration according to FIG. 6, the back surface 84 of the upper toothed belt l2 connects the pin material 52 to the teeth 82 of the lower toothed belt 28
Press against the adjacent tooth surfaces. In all four conveyance modes described above, fixation of the bottle stock 52 during staged conveyance is aided by the adjustable thrust of the guide devices 14 and 30. Guide devices l4 and 3
The toothed belts 12 and 28 are furthermore guided between the conveyors with no lateral movement (15) by means of the lateral guide surfaces 16. As already mentioned, the pin blank 52 is guided and held in a precise manner and is gradually conveyed between the clamping tools 48 of the clamping device 44, in order to form the wire pin head 54. The required short wire end is moved to the right in Figure 2 by tightening tool 4.
It sticks out from 8. The clamping tool 48 then closes and holds the bottle blank 52 until the swaging tool 6o swaths the head 54, the clamping tool serving as a working table. After the clamping tool 48 has been opened again and the swaging tool 6o has assumed its rear position, the completed bin 58 is moved one step further out of the tool range and the new bin material is transferred to the tool 4.
8. , 60, and then the process begins anew. After several conveyance intervals, the finished pin 58 reliably slides down via the chute at the end of the linear conveyance path without additional evacuation devices, or neatly reaches the finished bin for storage or other purposes. can be mechanically extracted and derived individually for further processing. Wire material (1
6) If the processing has to be carried out in several swaging stages, separate clamping and swaging devices may be installed, as described above, between the clamping and swaging device and the point where the finished pin slides. You can also serve them side by side. It should be noted that the conveying device according to the present invention, in combination with the line bottle manufacturing device, can manufacture up to 800 bottles per minute, that is, the conveying amount can reach 13 bottles in one second. Second Embodiment In FIG. 7, a reciprocating table 112 of a swaging device 114, which is a part of a manufacturing device for wire pins 182, is fitted into a bifurcated end (not shown) of a reciprocating table 112. It is connected via a pin to a connecting rod, which is held by a connecting device lid to the short-stroke crank pin of the drive shaft of the device. The carriage 112, which is shown in the forward operating position in FIG.
It is slidably guided (17) and supported on the substrate at 6. Attached to the illustrated end of the carriage 112 is an internally threaded threaded flange 140 into which is screwed an adjustment screw 142 which is exited by an annular nut 144. In the axial extension of the adjusting screw 142, a swaging tool 154, which is loaded by a compression spring of the swaging device 114 and is guided in a bearing bush of a separate guide device 148, is arranged so as to be vertically movable. A guide device 118 with a floatingly supported swaging tool 154 is attached to the machine frame 136 by two stay bolts 166 for easy removal or replacement. The return spring causes the swaging tool 154 to permanently contact the hexagonal head of the adjusting screw 142 through friction and jamming. Similarly, in the extension of the axis of the swaging tool 154, a wire pin 1 is located immediately in front of this swaging tool and symmetrically with respect to this axis.
Two clamping tools 176 (l8), which are attached to the respective levers or carriages of the clamping device 9 178 of the manufacturing device 82, are arranged, acting oppositely. Between these tightening tools 176, according to FIG.
84 is tightly tightened. The shaft of the wire bottle 182 protruding from the tightening tool 176 in FIG. It is tightly fastened in place. These two transport markings, of which only the lower toothed belt 192 is shown, cause the pin blanks 186, which do not yet have heads 184, to be intermittently swaged into the horizontal and vertical planes of the swaging device 114. It is brought exactly to the center in front of tool +54 and moved away from this swaging tool. In this case, the toothed belt (for example l92) is fitted with a swaging and tightening device ill 114.1
Gradually move at right angles to the swaging and tightening direction of 78. By means of respective height-adjustable guide strips, only the lower guide strip 198 is shown, the mutual spacing of these toothed belts and thus also the load holding the pin blanks 186 in the tooth slots can be adjusted. Can be done. Furthermore, the lateral guide surfaces of the guide strips (for example l98) allow the toothed belt to
It is guided over the transport section without being able to move laterally. In FIG. 7, a support piece 202 is attached to the front portion of the guide device of the carriage 112, and a swing lever 206 is supported by a pin 204 of this support piece. A coupling rod 210 acts on the pin 208 of each arm of this lever 206, which coupling rod 210 connects the swinging lever 206 via a pin 212 with the carriage 112 of the swaging device 114 on the one hand and the pin 218 on the other hand. It is connected to the tool holder 214 of the positioning device 216 for the pin blank 186 through the pin blank 186. These connecting rods 210 have two joint heads 220, 222, which are connected to each other by a turnbuckle 224. The tool holder 214 is guided so as to be vertically movable by two overlapping rods 226 on the machine frame 136.
A positioning tool 232 with four working surfaces 234 to 240 for a four-step positioning process is arranged on this holder 214, during which the bottle blank 18
You can change the vertical position of. The carriage 112 has a slit that can be adjusted vertically within the slit.
An additional positioning tool 246 is tightened by the pin 212 that secures the joint head 222. This positioning tool 246 has only two working surfaces 248 and 250 for axially moving the bottle blank 186 opposite to the direction of movement of the first positioning tool 232. On the far left side of FIG. 7 are two opposingly acting cutting tools 2 of the cutting device of the wire pin manufacturing device for cutting the wire 2754 and sharpening the wire pin material 186 into a pyramidal shape.
52 lower cutting tool is shown. The manner of operation of the conveying device described above, when this conveying device is part of the wire pin manufacturing apparatus partially shown in FIG. 7, is as follows. Although not shown, a known pulling device pulls the wire 254 from the wire coil through the straightening device and only as needed for the desired wire pin length and for forming the wire bin head 184. (2l) is passed through the opened cutting tool 252 and drawn into the tooth grooves of both toothed belts (for example l92).
The opposing cutting tool 252, which can now fit into each lever or each carriage, cuts the wire 254, resulting in a pyramid-shaped wire pin tip 188. During the insertion between both toothed belts and the cutting of line 254, the intermittent drive of the toothed belt pair is briefly stopped. The drive is then restarted for a short time, so that the toothed belt pair is
The step is moved further and stopped again before a new line feed (this can also be done with a c3 step feeder). This means that the cut bottle material 186 is attached to the tightening device 1.
Swapping device 11 between both tightening tools 176 of 78
The swaging process is continued until the swaging tool 154 is located at the center in front of the swaging tool 154. In order to be able to produce pins in the largest possible length range without large switching movements, the device is designed to tighten and dent the cutting tool 252 of the cutting stamp as well as the device for producing the wire bin 182 (22). In order to compensate for the fixed arrangement of the fittings 178, 114, the different distances from the wire pin tip 188 to the swaging tool 15'4 when manufacturing bottles of different lengths are determined by the cutting location and head. The displacement of the pin blank 186 in the longitudinal direction of the transport section between the swaging location and the swaging location is compensated as follows: The positioning of the pin blank 186 is carried out by the two positioning tools 232, M and 246 of the positioning device 216; 1 tool 232 has four working surfaces 234 to 240 for stepwise feeding. This stepwise positioning takes place during each feed of the carriage.During the forward movement of the outgoing filter table 112, i.e. When manufacturing each wire pin head 184,
Positioning tool 232 guided on machine pedestal 136
is moved to the conveying device via the coupling rod 2]0 and the swing lever 206, so at this point the positioning tool 23
The pin hole 186 in front of the first operating surface 234 of 2 is a predetermined distance! llTI will be sent. As already mentioned, the transport device is stopped during this process. Oukondai 112
During the return, the drive is operated for a short period of time (23) so that the bin stock 186, previously caused to move forward from the working surface 234 of the tool 232, is now moved to the second working surface 236. , and during the new swaging process, the same size block is sent. This is bottle material 1
86 is performed until the positioning tool 232 is moved from the fourth working surface 240 to the forward position. In this vertical position the pin element fi1'l86 is gradually conveyed further in the direction of the swaging station until it is located in front of the working surface 250 of the second positioning tool 246. Similarly, M
As a result of the swaging movement of the table 112, the bottle material 186
is moved back from the movement 250, if necessary, by a small amount, thereby canceling out the length tolerance of the pin blank, so that this bottle blank assumes its final position, and in the example this pin blank 2
After two conveyance intervals, the wire end is removed from the clamping pawl 176 as long as required for the formation of the wire bin head 184.
It is located between both tightening tools 176 so as to protrude from the top. In the case of the longer bottle blanks J1'l86, the return movement of these bottle blanks is carried out in two stages by the second positioner (24) tool 246, i.e. the pin removal is first from the working surface 248 and then from the working surface 248. from the working surface 250 and returned to the final position. It is clear that the positioning device 421.6 can be omitted altogether if only length-dependent pins are to be manufactured and a very high pin quality is not required. In this case, the cutting device is arranged in such a way that the bottle blank 186 is positioned in the conveying device in such a way that as much wire end as is required for head production during the swaging process protrudes from the clamping tool 176. , is placed. When the clamping pawls 176 are closed, they retain the pin blank 186 for the next swaging process for manufacturing the bottle head 184. For this purpose, the drive shaft is moved, which gives the carriage 112 a reciprocating motion. In this reciprocating movement, a swaging tool 154 which engages and is not coupled to the hexagonal shape of the adjusting screw 142 by means of a return spring and produces a head 184 on the pin blank 186 during each forward movement,
In this case, the tightening tool 176 serves as a processing table. (25
) 4 With each rearward movement of the carriage 112, the compression spring stretches and pushes back the swaging tool 154, so that this swaging tool is in permanent frictional contact with the adjusting screw 142. The height of the swaging pressure (and therefore the shape of the wire bottle head) is adjusted by adjusting the screw 142 at the flange 140 on the carriage 112.
It can be adjusted by screwing it in several steps. At each transport step, the completed wire pin 1B2 is moved further out of the tool range, a new bottle blank 186 enters between the tools +54 and 176, and the process then begins anew. After several transport intervals, the finished bin 18
2. At the end of the conveying section, the finished pins that slide down reliably through the chute without additional extrusion devices or arrive in an orderly manner are mechanically removed and removed individually for storage or other further processing. be able to.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the first embodiment;
2 is a partially cut away side view of the embodiment of FIG. 1; FIG. 3 is a pair of conveyor belts of FIG. 1 used for small and large diameter workpieces; Fig. 4 is an enlarged view of a conveyor belt pair used for small diameter workpieces and large diameter workpieces, with different operating methods. An enlarged view of the pair of conveyor belts of FIG. 3, operating in a third manner, commonly used for workpieces and large diameter workpieces, as shown in FIG. 6. Enlarged view of a pair of conveyor belts of a modified example of the first embodiment, used for
The figure is a partially cutaway plan view of the second embodiment. 1; 2, 2 8・, 192...Toothed belt, 52
, 1.86...Workpiece, 76,78...Tooth groove (27)

Claims (1)

Claims: 1. Continuously from one machining station perpendicular to the longitudinal axis from one machining station to at least one other machining station, with a conveyor belt that can be deflected and which can be clamped around the circumference of the workpiece. In a conveying device for conveying elongated workpieces, such as wire pieces, two belt sides of two conveyor belts (12 and 28, 192) running together and side by side are located between these processing stations. Workpiece to be transported (52, 186
), at least one of both conveying belts is a toothed belt (12 or 28, 192), the tooth grooves (76 or 78) is the workpiece (52, 18)
6) A transport device for transporting elongated workpieces such as wire pieces, characterized in that they individually support the workpieces. 2. In the case of two toothed belts (12 and 28), possibly of the same cross-section, whether the jointly guided belt sides of these toothed belts have teeth (80 or 82) in the same direction. 2. Conveying device according to claim 1, characterized in that it is arranged symmetrically with respect to the conveying plane created by the longitudinal axis of the clamped workpiece, or by the longitudinal axis along which the clamped workpiece is to be moved. 3. In two toothed belts (12 and 28), possibly of the same cross-section, mutually opposite teeth (8) on the jointly guided belt sides of these toothed belts
0 or 82) are offset from each other in the conveying direction, and the tooth rows on both sides cover the workpiece (52, 186) by two mutually facing tooth flanks or by one tooth groove (78) and one tooth head. 2. Conveying device according to claim 1, characterized in that it is tightened by (86). 4 Each conveyor belt and each toothed belt (12 or 28,
192) engages a three-sided guide device (14 or 30, 198) on the belt sides that conveys the workpiece (52, 186) between two mutually adjacent processing stations, and the teeth on these belt sides (80 or 82) or the belt back surface (84) is exposed.
The conveying device described in . 5. The rail-shaped guide devices (14 and 30) are displaceable in at least one of two transverse directions perpendicular to the transport direction and in any case perpendicular to the longitudinal direction of the workpiece (58). 5. Conveying device according to claim 4, characterized in that it is arranged. 6. A positioning device (216) for positioning the workpiece (186) along the axis is added, the positioning device including at least one positioning device for moving the at least one workpiece a predetermined distance in the longitudinal direction. two positioning tools (
6. Conveying device according to claim 1, characterized in that it has 232 or 246. 7 The positioning tool (232 or 246) is
86) movable in parallel to the longitudinal direction of the
characterized in that it has one working surface (234 or 236 or 238 or 240 or 248 or 250), which working surface acts on and engages the workpiece in the section of this working stroke during the working stroke; The conveying device according to claim 6. 8. The positioning tool (232 or 246) is placed on two working surfaces (234 and 236 or 236 and 238 or 238 and 240 or 248 and 250) that are next to each other.
8. Conveying device according to claim 7, characterized in that it has at least one stage for connecting the two parts to each other. 9. Claim 7 or 8, characterized in that the positioning tool (232 or 246) is a rigid body movable parallel to the longitudinal direction of the workpiece (186) to be moved.
The conveying device described in . 10. The conveying device according to claim 1, characterized in that it is used in a wire processing machine.