JP2010259348A - Method and apparatus for automatically sending scallop to machine for boring hole in scallop, and apparatus for boring hole in scallop equipped with apparatus for automatically sending scallop - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the processes from the setting of a scallop to a machine for boring a hole in the scallop to the boring of the hole to be automated to improve the efficiency of a setting operation of the scallop to the machine for boring the hole. <P>SOLUTION: The method for automatically sending the scallop to the machine for boring the hole in the scallop is carried out as follows. The randomly arranged scallops are manually or automatically arranged in the prescribed direction and transferred, and the arranged scallops are sent to a setting part of the machine for boring the hole in the scallop in the arranged direction one by one. The scallop is fed to a conveyor so that the expanded hinge part of the scallop may be directed downward and the one sheet part of the expanded hinge part may be directed to a drill side of the machine for boring the hole in the scallop, and set to the setting part of the machine for boring the hole in the scallop by being conveyed in the posture. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention can supply a scallop to a scallop drill with a method of feeding scallops one by one into a scallop drilling device (machine) that opens a hole for inserting a shell locking tool into the scallop and a scallop aligned one by one in a predetermined direction. The present invention relates to a method for automatically feeding scallops to a scallop drilling machine, a device therefor, and a scallop drilling device with an automatic scallop feeder.

  When scallop shell culture is carried out by ear, it is necessary to make a hole for inserting a shell lock for culturing into the ear of the scallop shell. As the drilling machine, there is a drilling machine according to the applicant's application (Patent Document 1). In this drilling machine, a number of set parts capable of holding scallops standing vertically with their ears facing down are provided in an endless chain at regular intervals, and the scallops sandwiched between the set parts are conveyed to a predetermined position. When the motor arranged forward in the conveying direction advances toward the scallop, presses the scallop against the rotating drill blade equipped at the tip of the motor to make a hole in the ear of the scallop, and when the drilling is finished The motor is retracted so that the drill blade comes out of the hole of the scallop, and one scallop is continuously conveyed by repeating the conveyance of the scallop, the advance of the motor, the pressing of the scallop against the drill blade, and the retraction of the motor. The holes are sequentially opened one by one.

JP 2008-154405 A

The conventional drilling machine has been requested to improve the following points.
(1) Since the setting work of scallops to the setting part of the drilling machine has to be performed manually by workers one by one, one worker is restrained by one machine and the workability is poor.
(2) Because the set part is narrow, it requires skill and experience to set scallops one by one in a predetermined direction in the set part that is running continuously. The number of scallops set according to the experience and ability of the worker There is a difference in the number of holes.

  The problem to be solved by the present invention is to automatically supply scallops to the set part so that a conventional punch can be used efficiently.

  The method for automatically feeding scallops to the scallop drilling machine of the present invention is to supply the scallops in a predetermined direction by hand, hold the direction and transfer the scallops to the scallop punch, This is a method that automatically feeds the set part of the scallop punch from the side one by one.

  The scallop automatic feeding method to the scallop drilling machine of the present invention automatically aligns scallops supplied at random in a predetermined direction, holds the scallop to the scallop driller side, and transfers the scallop to the scallop punch. It is also possible to automatically feed one by one from the side to the set portion of the scallop drilling machine ahead in the transfer direction.

  The scallop automatic feeding method to the scallop driller according to the present invention is such that the scallop being transferred in a certain direction is temporarily stopped in front of the scallop punch, and the set portion of the scallop punch passes past the scallop transfer direction. In some cases, the scallop may be resumed and automatically sent to the set unit.

  In the scallop automatic feeding method to the scallop punch of the present invention, in any of the above cases, the scallop ear is down and one piece of the scallop ear is directed to the drilling drill side of the scallop punch as a transfer body. It is supplied, transported in that direction, and sent to the set part of the scallop punch in that direction.

  A scallop automatic feeding device to a scallop drilling machine according to the present invention comprises a transfer body for transferring a scallop shell supplied in a predetermined direction, and a guide for holding the scallop shell transferred by the transfer body in the predetermined direction. Is arranged on the transfer body along the transfer direction of the transfer body, and allows the scallops to be fed one by one into the set portion of the scallop punch from the side in the above-mentioned direction.

  The scallop automatic feeding device to the scallop drilling machine of the present invention may be provided with an aligning unit that automatically aligns a number of randomly supplied scallops one by one in a predetermined direction before the transfer body.

  In the scallop automatic feeding device to the scallop drilling machine of the present invention, the transfer body can be a combination of conveyors having different transfer speeds arranged on the scallop supply side and the scallop supply side.

  The scallop automatic feeding device to the scallop drilling machine of the present invention is configured to move the feed and the forward end of the transfer body when the scallop transferred by the transfer body is sent from the side to the set part of the scallop drilling machine. A control unit that takes timing with the set unit may be provided. The control unit has a detection sensor that detects scallops conveyed by the transfer body, a speed adjustment mechanism that reduces the transfer speed of the transfer body or stops the transfer body based on a detection signal from the detection sensor, and a reduced speed It is possible to provide a timing mechanism for switching the speed of the transport body to a high speed or restarting the transport body that has been stopped and feeding the scallops on the transport body into the set portion of the scallop punch.

  A scallop automatic punching device with a scallop feeding device according to the present invention comprises a scallop drilling machine that opens a shell locking tool insertion hole in the scallop shell, and a scallop automatic feeding device that feeds the scallop shell into a set part of the scallop drilling device. 10. The scallop shell automatic feeding device according to any one of claims 5 to 9, wherein the scallop drilling machine comprises a number of set portions and a drill drill equipped in an endless rotating body, and is set in the set portion. The scallop shells are transported to the drilling drill by the rotation of the endless rotating body and drilled, and the scallop shell automatic feeding device is installed on the side of the scallop driller so that the scallops to be transported can be fed into the set part from the side. Is arranged. In this apparatus, a pop-out prevention tool that prevents the scallop shells that are fed out from jumping out of the set portion can be provided in the vicinity of the set portion.

The scallop automatic feeding method to the scallop drilling machine of the present invention has the following effects.
(1) Since the scallops are transported in the specified direction and automatically fed one by one from the side into the set part of the scallop driller, all the scallops sent to the set part are automatically aligned in the same direction. The locking tool insertion hole can be placed at a predetermined position of the scallop.
(2) Randomly supplied scallops are automatically aligned and transferred one at a time, greatly improving the supply of scallops to the set part of the scallop drilling machine and enabling significant labor savings. It becomes.
(3) The scallop to be transferred is temporarily stopped in front of the scallop punch, and when the set portion of the scallop punch passes the scallop transfer direction, the transfer of the scallop is resumed and automatically set to the set portion. Since it sends in, the scallop can be reliably sent into the set part.
(4) The scallop ears are fed downwards, and one piece of scallop ears is supplied to the transfer body toward the drilling drill side of the scallop driller and transferred in that direction. Since it is fed into the set section, it is possible to make a hole in one piece of the scallop ear.

The scallop feeding device of the present invention has the following effects.
(1) Since the scallops are automatically fed to the set part of the scallop punch just by supplying them to the transport body, it is necessary to put (set) them one by one into the narrow set part while traveling as before. Even an unskilled person can supply scallops, and there is no difference (quality variation) in work efficiency, drilling accuracy, etc. depending on the experience and ability of the worker.
(2) A guide for holding the scallops transferred by the transfer body in the predetermined direction is provided, and the guides are arranged along the transfer direction of the transfer body. It can be transferred in the direction and automatically sent to the set part, and a hole can be made at a predetermined position of the scallop.
(3) If a random number of scallops are aligned one at a time using an automatic alignment device such as a parts feeder or turntable, everything from the supply of scallops to the set section to the drilling can be performed automatically. Further improvement of sex can be expected.
(4) When the transfer body is a conveyor, the scallop can be reliably transferred with a simple configuration.
(5) Since the holding guide is on the transfer body, the scallops supplied in a predetermined direction on the transfer body are transported while being held in the supplied direction, and are fed into the set unit. A hole can be drilled at a position.
(6) When the transfer body is a combination of conveyors with different transfer speeds arranged on the scallop supply side and the scallop supply side, it is easy to take the timing of the scallop supply to the set part during travel, and reliable transfer is possible. It becomes possible.
(7) A detection sensor for detecting scallops conveyed by the transfer body, a speed adjusting mechanism for decelerating the transfer body or stopping the transfer body based on a detection signal from the detection sensor, and a decelerated transfer It has a feed control mechanism that feeds the scallops on the transport body into the set part of the scallop driller by restarting the transport body that has been switched or stopped at high speed, so that the scallop is fed into the set part during travel Is certain.

The scallop drilling device with the scallop feeding device of the present invention has the following effects.
(1) Since the scallop drilling machine that drills a shell locking tool insertion hole in the scallop and any one of the scallop automatic feeding devices described above, it is continuously performed from the feeding of the scallop to the drilling to improve workability. .
(2) Since the pop-out prevention tool for preventing the scallop shell to be fed out from the set portion is provided in the vicinity of the set portion, the scallop shell is reliably fed into the set portion.

The front view which shows an example of the scallop drilling apparatus with a scallop automatic feeding apparatus of this invention. The top view which shows an example of a scallop drilling apparatus with a scallop automatic feeding apparatus of this invention. The front view which shows the other example of the scallop drilling apparatus with a scallop automatic feeding apparatus of this invention. The left view which shows an example of a scallop drilling apparatus with a scallop automatic feeding apparatus of this invention. FIG. 3 is a sectional view taken along the line aa in FIG. 2. Explanatory drawing which shows the drilling location of a scallop.

  A first embodiment of a scallop automatic drilling device with a scallop feeding device according to the present invention will be described with reference to the drawings. As shown in FIG. 1, this embodiment includes a scallop drilling machine 3 and an automatic scallop feeding device 2 that automatically feeds scallops thereto.

(Embodiment of scallop feeding device to scallop punch)
As shown in FIGS. 1 and 2, the scallop feeding device 2 transports the scallop A to the conveyor 4 that conveys the scallop A, the guide 5 provided above the conveyor 4 along its longitudinal direction, and the terminal end of the conveyor 4. The scallop recognition sensor 7 (FIG. 2) for detecting that it has been performed and the speed adjustment for slowing or stopping the speed of the endless conveyor 4 according to the signal transmitted based on the detection information from the scallop recognition sensor 7 A mechanism 7 is provided.

  The scallop feeding device 2 is for transporting the scallop A in the horizontal direction (the scallop punch 3 side) with the scallop A standing (with the ear B down). As shown in FIG. 1, the scallop feeding device 2 has a frame 9 mounted on a support leg 8, and a belt conveyor type conveyor 4 is rotatably mounted on the frame 9. In the conveyor 4, the belt 11 wound around the roller 9 is rotated by the rotation of a rotating roller 12 that is rotatably provided at both ends of the frame 9. The two rotating rollers 12 are rotationally driven by a drive motor, for example, an induction motor 13.

  The guide 5 arranged on the conveyor 4 is for guiding the scallop A supplied manually on the conveyor 4 to the scallop punch 3 side, and in the longitudinal direction (transfer direction) of the conveyor 4. It is provided along. 1 and 2, the guide 5 shown in FIGS. 1 and 2 has two horizontally elongated plates 5 a (FIG. 2) facing each other in the longitudinal direction of the conveyor 4, and a passage 6 (FIG. 2) through which scallops are transferred between the horizontally elongated plates 5 a. It is provided in the longitudinal direction of the conveyor. The passage 6 has a width that allows the thickest central portion of the scallop A to stand in a substantially vertical state (interval between the horizontally long plates 5a). If the passage 6 is too wide, the scallop A supplied vertically in the passage 6 may fall to one of the horizontally long plates 5a or may fall over in the lateral direction (traveling direction). Both sides or one side are wide enough to be in contact with both horizontally long plates 5a. In order for the width of the passage 6 to be compatible with scallops A of various sizes, a guide adjusting mechanism that can adjust the distance between the two horizontally long plates 5a and the inclination angle to the inside and outside of the passage 6 is provided. Is desirable.

  The frame 9 and the conveyor 4 are arranged on the side of the scallop punch 3 in a direction substantially orthogonal thereto, and the axis of the guide 5 arranged on the conveyor 4 is the conveyor 4 as shown in FIG. The scallop piercing machine 3 side is slightly inclined with respect to the transport direction side. By making the slant in this way, the scallop A can be reliably fed into the set portion 50 that is traveling in the transport direction ahead of the scallop punch 3.

  The guide 5 is configured such that the back of the worker-side horizontal plate 5 a is lower than the back of the other horizontal plate 5 b so that the operator can easily put the scallop A between the guides 5.

  The scallop recognition sensor 7 is for detecting the presence of the scallop A at the terminal end of the endless conveyor 4, and one scallop recognition sensor 7 is provided outside each of the guides 5. As shown in FIG. 2, the scallop recognition sensor 7 is attached to face each other so as to face the inside of the guide 5, and can detect the presence or absence of the scallop A through a long hole provided in the guide 5. is there.

  The scallop recognition sensor 7 (FIG. 2) is for detecting whether or not the scallop A has been transferred to the end of the conveyor 4, and detects when the scallop A has arrived at the end of the conveyor 4. A signal is transmitted to the processing unit of the speed adjusting mechanism, and the rotation of the conveyor drive motor M is stopped by the processing unit so that the rotation of the conveyor 4 can be temporarily stopped. As the scallop recognition sensor 7, an existing or new light sensor or a sensor of a detection method other than the light detection method can be used.

  The speed adjusting mechanism 7 is for starting, decelerating, and stopping the travel of the endless conveyor 4 so that the following speed control can be performed based on a detection signal from the scallop recognition sensor 7 (FIG. 2). It is. When the conveyor 4 runs at a constant speed (hereinafter referred to as “normal speed”) and receives a detection signal of the scallop A from the scallop recognition sensor 7, the conveyor 4 is stopped, and when a predetermined time (for example, several seconds) has elapsed, scallop drilling is performed. The conveyor 4 is restarted at the timing when the scallop A is sent to the set unit 50 of the machine 3, and after the scallop A is sent to the set unit 50, the conveyor 4 is again returned to the normal speed and travels.

(Embodiment of scallop drilling device with scallop automatic feeding device)
An example of the scallop drilling machine 3 shown in FIGS. 3 and 4 is the scallop drilling machine (Japanese Patent Application Laid-Open No. 2008-154405) of the applicant of the present application. The endless carrier 40 (FIG. 5) is provided with a plurality of set portions 50 (FIG. 5) on which scallops A can be set one by one. The set portion 50 is an endless carrier. When the vehicle travels by rotating 40, the scallop A set in the setting unit 50 is transported to the drill 20 (FIG. 5) side disposed in the transport direction ahead of the endless transport body 40. The drill 20 is mounted on the motor M (FIG. 2) and is rotatable. The motor M is disposed so as to be able to move forward and backward (reciprocate) in the transport direction of the endless transport body 40. When the scallop A set in the setting unit 50 is transported to the drill 20 side, the motor M and the drill 20 are moved. It advances so that the insertion hole C is made in the scallop A.

  The endless transport body 40 is a chain conveyor, and the set unit 50 attached to the endless carrier 40 forms a set with the movable piece 52 and the fixed piece 53 facing each other, and the scallop A is placed between the movable piece 52 and the fixed piece 53 in its ear. It can be placed (set) vertically with B facing down, and when it is transported to a predetermined position, the movable piece 52 moves to the fixed piece 53 side, and the scallop A is sandwiched and fixed between the two pieces 52 and 53. It is made to do. The endless transport body 40 is accommodated in a transport body case 55 and is rotated within the transport body case 55.

  In the transport body case 55 of the endless transport body 40, the scallop A that has been transferred from the scallop automatic feeder 2 (FIGS. 1 and 2) to the set unit 50 does not pop out to the opposite side in the transport direction. A piece (hereinafter referred to as “regulatory piece”) 46 (FIG. 2) is provided. The illustrated regulating piece 46 is a flat plate, and is fixed on the conveyance body case 55 in the lateral direction. The width of the opposing surface 46a (FIG. 2) facing the conveyor 4 of the scallop automatic feeding device 2 among the regulating pieces 46 is made wider than the interval between the movable piece 52 and the fixed piece 53 of the set portion. When the scallop A fed into the set unit 50 abuts against the facing surface 46a, the scallop A is surely contained in the set unit 50. The facing surface 46a is further forward in the same direction from the front side in the running direction of the set unit 50. The scallop A is surely stored in the traveling set unit 50 when the scallop A sent from the scallop automatic feeding device 2 to the set unit 50 hits the facing surface 46a. It is like that. The restricting piece 46 prevents the scallop A fed from the scallop automatic feeding device 2 to the set unit 50 from jumping out of the set unit 50 or being displaced even if it is accommodated in the set unit 50. As long as the above can be achieved, other shapes and structures can be used.

  The motor M is attached to and suspended from a moving body 69 (FIG. 5) set on a slide rail 68 arranged and fixed in the transport body case 55. The motor M is driven by an inverter so as to rotate more than 30,000 revolutions per minute. The motor M automatically switches between a high speed rotation and a low speed rotation. When the scallop A is transported, the motor M rotates at a high speed to move the endless transport body 40 at a high speed, and when drilling into the scallop A, the motor M rotates at a low speed. Thus, the endless transport body 40 is moved at a low speed.

  The traveling speed of the endless transport body 40 is set to a speed at which 100 scallops can be drilled per minute, and the low speed moving speed is about 20% of the high speed moving speed. The rotation speed of the motor M is set by the adjustment volume.

(Usage example of scallop drilling device with scallop automatic feeding device)
The usage example of the scallop automatic feeding device-equipped drilling device of the present invention will be described with reference to the drawings. As shown in FIG. 1, the scallop A is manually supplied into the passage 6 of the guide 5 on the conveyor 4 of the scallop automatic feeder 2 arranged on the side of the scallop punch 3. In this case, the ear B of the scallop A is directed downward, and further, one piece D (FIG. 6) of the ear B is supplied toward the drill 20 (FIG. 5). The supplied scallop A is transferred to the scallop punch 2 side by the rotation of the conveyor 4. In order to prevent clogging of the scallops A on the conveyor 4, the scallops A are supplied one by one at regular intervals during the supply. As an example, it is preferable to leave a space equivalent to one, two, or three scallops A. In this case, if the mark indicating the scallop supply position is displayed on the guide 5 or the like with an interval, the supply interval can be easily secured.

  The scallop A transferred by the conveyor 4 temporarily stops at the terminal end (exit side) of the conveyor 4 and waits for the set unit 50 of the scallop punch 3 to arrive next to the terminal end (exit side). Or immediately before that, the transfer of the scallop A on the conveyor 4 is resumed and sent to the set unit 50. The scallop A to be fed is abutted against the opposing surface of the regulating piece 46 and is securely accommodated in the set portion 50. The scallop A sent to the set unit 50 is transported to the drill 20 side by the endless transport body 40 of the scallop driller, and when the scallop A approaches the drill 20, the endless transport body 40 is decelerated, and the drill 20 is scalloped at that timing. Advancing to the A side, an insertion hole C is opened in the ear B of the scallop A.

  The configuration of the scallop automatic feeding device 3 to the scallop drilling device of the present embodiment is basically the same as that of the scallop automatic feeding device 3 to the scallop drilling device described in Example 1. The difference is that a takeover conveyor 70 having a rotational speed different from the rotational speed of the conveyor 4 is provided on the outlet side of the conveyor 4. This takeover conveyor 70 is for taking over the scallop A transferred by the conveyor 4 and temporarily stopping it, and then preventing the scallop A from falling sideways when the rotation is resumed (for example, after several seconds). Therefore, the rotation speed may be slower or faster than the rotation speed of the conveyor 4 as long as the rotation can be prevented, but the higher the rotation speed of the conveyor 4 is, Easy to send to 50. For example, the rotation speed of the transfer conveyor 70 can be about twice that of the conveyor 4. If a servo motor is used to drive the takeover conveyor 70, the takeover conveyor 70 can be switched between a high speed and a low speed, so that it is easy to take the timing of stopping or resuming traveling. The takeover conveyor 70 is shorter than the conveyor 4.

  The takeover conveyor 70 can be arranged on the same axis of the conveyor 4 or can be arranged obliquely with respect to the axis. In this way, the scallop A to be conveyed is always supported by being tilted in the direction of one elongated piece 5a (FIG. 2) in FIG.

  A guide 5 for guiding the scallop A in the transport direction can also be provided on the takeover conveyor 70. The guide 5 may be integral with the guide 5 of the conveyor 4 or may be separate.

  In the first and second embodiments, the scallop A is supplied semi-automatically onto the conveyor 4 by hand. However, in the present invention, as shown in FIG. An automatic aligner 80 such as a table is arranged so that a large number of scallops supplied at random are automatically aligned one by one in a predetermined direction and can be supplied to the scallop automatic shell feeder 2. Good. The automatic aligner 80 can also be a part of the scallop automatic feeding device 2.

  The scallop drilling machine 3 with the scallop automatic feeding device described above is an example of the embodiment of the present invention. The scallop automatic feeding apparatus according to the present invention and the scallop drilling machine 3 with the scallop automatic feeding apparatus have other mechanisms, It can also be realized by means.

2 Scallop Automatic Feeding Device 3 Scallop Drilling Machine 4 Conveyor 5 Guide 5a, 5b Horizontal Long Plate 6 Passage 7 Scallop Recognition Sensor 8 Support Leg 9 Frame 13 Induction Motor 20 Drill 40 Endless Conveying Body 46 Regulating Piece 46a Opposing Surface 50 Set Part 52 Movable Piece 53 Fixed piece 55 Transport case 68 Slide rail 69 Moving body 70 Transfer conveyor 80 Automatic alignment machine A Scallop B Ear C Insert hole D Single piece M Motor

Claims (11)

  Supply the scallops in the specified orientation by hand, hold the orientation and transfer it to the scallop driller side, and place one scallop from the side on the set part of the scallop punch ahead A method for automatically feeding scallops to a scallop drilling machine, which automatically feeds each one.   Randomly supplied scallops are automatically aligned in a specified direction, and the scallops are kept in that direction and transferred to the scallop driller side. A method for automatically feeding scallops to a scallop drilling machine, which automatically feeds scallops one by one.   The scallops that are transported in a certain direction are temporarily stopped in front of the scallop driller, and when the set part of the scallop driller passes past the scallop transfer direction, the scallop is resumed and automatically transferred to the set part. The method for automatically feeding scallops to the scallop driller according to claim 1 or 2, wherein   Feed the scallop ears downward and one part of the scallop ears toward the drilling drill side of the scallop drilling machine, transfer it in that direction, and in that direction to the set part of the scallop drilling machine 4. A method for automatically feeding scallops to a scallop driller according to claim 1, wherein the scallops are fed.   A transfer body for transferring scallops supplied in a predetermined direction and a guide for holding the scallops transferred by the transfer body in the predetermined direction, the guide being arranged on the transfer body along the transfer direction of the transfer body An apparatus for automatically feeding scallops into a scallop punch, wherein the scallops can be fed one by one into the set portion of the scallop punch from the side in the above direction.   6. A scallop hole according to claim 5, further comprising an aligning section for automatically aligning a plurality of randomly supplied scallops in a predetermined direction one by one before a transfer body for transferring the scallops in a predetermined direction. Automatic scallop feeding device to the drilling machine.   The scallop shell automatic feed device to the scallop driller according to claim 5 or 6, wherein the transport body includes conveyors having different transfer speeds arranged on the scallop supply side and the scallop feed side.   When the scallops transferred by the transfer body are sent from the side to the set part of the scallop driller, a control unit is provided that takes the timing between the feed and the set part that moves the forward side of the transfer body. An apparatus for automatically feeding scallops to a scallop driller according to any one of claims 5 to 7.   A detection sensor for detecting scallops conveyed by the transfer body by the control unit, a speed adjusting mechanism for decelerating or stopping the transfer body based on a detection signal from the detection sensor, and a decelerated transfer body 9. The scallop shell according to claim 8, further comprising a timing mechanism for switching the speed of the scallop to a high speed or restarting the transport body that has been stopped and feeding the scallop on the transport body into a set portion of the scallop punch. Automatic scallop feeding device to the drilling machine.   A scallop drilling machine for making a scallop shell insertion hole in a scallop shell and a scallop automatic feeding device for feeding the scallop shell into a set part of the scallop drilling machine, wherein the scallop automatic feeding device is any one of claims 5 to 9. The scallop drilling machine is provided with a large number of set parts and drilling drills mounted on an endless rotating body, and the scallop shells set on the set part are rotated by the endless rotating body. The scallop shell automatic feeding device is located on the side of the scallop drilling machine so that the scallop shell to be transferred can be fed into the set part from the side. Scallop drilling device.   A scallop piercing device with an scallop automatic feeding device, characterized in that a scallop prevention device is provided in the vicinity of the set portion of the scallop drilling machine to prevent the scallop shell fed into the set portion from jumping out of the set portion.

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