JP3970897B2 - Automatic nailing device for game board - Google Patents

Description

  The present invention relates to an automatic nailing device for a game board used in a pachinko machine or the like constructed by standing a plurality of nails on a board surface.

A nailing device for driving nails of a game board of a pachinko machine sets a game board one by one on an XY table, and drives this XY table by a 2-axis control servo motor of the X axis and the Y axis. The position where the nail of the board should be struck is positioned at the nail driving position of the nailing machine. In the nailing machine, the nail is driven by driving the holder for gripping the nail driven by the air cylinder until the air cylinder is stopped against the stopper member or stopped against the cylinder end. Move to the position of the supply section. In this nail supply unit, the nail is supplied to the holder one by one by driving the air cylinder for the nail supply unit until it hits the stopper member or the cylinder end. Thus, the holder supplied with one nail drives the air cylinder and moves the nail to the nail driving position. Next, the hammer member driven by the air cylinder is driven to drive the air cylinder to a predetermined height on the game board in conjunction with the operation of driving the air cylinder until it hits the stopper member or the cylinder end. Thereafter, the XY table is moved and positioned again, and the operation of driving the air cylinder of the holder to supply the nail and driving the air cylinder to drive the nail with the hammer member is repeated. When a plurality of nails have been erected on the game board in this manner, the game board material that has already been nailed is removed from the XY table, the game board material to be driven next is set on the XY table, and the aforementioned nail Repeat striking work.
JP-B-2-35587

  However, in the nailing machine, the movement of the holder, the nail supply operation of the nail supply unit, and the nail driving operation by the hammer member are performed using an air cylinder. When the air cylinder is used as a drive source in this way, when this nailing machine is not used for a long time and then reused, in the case of winter use, or when the air supply balance is disrupted, Since the operation of the air cylinder is slow, the timing of the movement of the holder and the nail driving operation by the nail supply part or hammer member is shifted, causing a nail supply error, or the nail being driven onto the board surface is bent. In some cases, quality defects such as non-uniform height from the board surface of the driven nail may occur. This poor quality board must be checked, removed or repaired, and each air cylinder must be adjusted, reducing the nailing machine's availability. There is a problem.

  In addition, if the air cylinder drive operation is configured to stop by hitting the stopper member or cylinder end in order to control the operation of the air cylinder, it will be caused by a large impact when the stopper member or cylinder end collides and stops. In addition, the parts related to the air cylinder are exhausted so that the service life of these parts is shortened and the repair cost increases. Furthermore, if the consumable parts must be frequently replaced, the time for stopping the nailing machine becomes longer and the operating rate is further reduced. Moreover, since a large impact sound is generated when the air cylinder collides with the stopper member or the cylinder end, there is a problem that the factory environment is deteriorated by this noise.

  Therefore, the following improvement measures can be considered. First, it is detected that each air cylinder has reached the forward end position or the reverse end position, and after confirming that the operation of each step has been completed, the next operation is started. In addition, a cushioning material is provided at the stop end of the air cylinder, and the air cylinder is driven and controlled to be positioned and stopped at a predetermined position. In this way, it is possible to prevent an impact from occurring in relation to the operation of the air cylinder. For this reason, if the completion of the operation of each process is detected and the positioning control is performed, the nail driving device becomes expensive. However, there is a problem that the cycle time for executing the operation of the one cycle becomes long and the work efficiency is lowered, and the problem is not fundamentally solved.

The automatic nailing device for a game board according to the present invention is provided with an XY table, a processing portion and a nail supply device in the device main body, a cam mechanism, a holder and a hammer are provided in the processing portion, and the cam mechanism is rotated by a motor. The driven cam spindle is provided with a holder up / down cam and a holder front / rear cam, the game board is mounted on the XY table, the XY table is positioned based on the coordinate data of the nail driving position, and supplied from the nail supply device The nail contacts the game board and the hammer as the holder that supports the lowering of the nailing portion descends by the lower and upper cams of the holder and the forward movement by the front and rear cams of the holder. after placing between the game board and the hammer without, the holder, without having to go with the advancement by the holder before and after the cam, linearly under the action of just lowering by the holder vertically cam trajectories The drawing carries the nail with to descend from the side of the hammer to the side of the game board, the nail carried in the holder hammer, characterized in that the implanting on the game board is lowered.

In the automatic nailing device for a game board according to the present invention, the holder supporting the nail supplied from the nail supply device protrudes downward by the action of both the lowering by the holder vertical cam and the forward movement by the holder front and rear cam at the nail driving portion. after placing between the game board and the hammer without the nail with to descend in an arc-shaped trajectory in contact with the game board and hammer holder without having to go through the holder involves advanced by the holder before and after the cam The nail is transported from the hammer side to the game board side as it descends while drawing a linear trajectory by the action of only the lowering by the upper and lower cams, so that the nail held by the holder can be positioned at the nail driving position.

  Hereinafter, this embodiment of the automatic nailing device for a game board according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the nail driving device of the present embodiment is configured by mounting an XY table portion 12, a processing portion 14 by a cam mechanism, a nail supply device 16, an operation panel 18 and a control panel 20 on the apparatus body 10. Has been.

  As shown in FIG. 2, the XY table portion 12 provided in the apparatus main body 10 is slidable on a sliding guide member (not shown) installed in the X axis direction and the Y axis direction perpendicular to each other. The X-axis servo motor 24 and the Y-axis servo motor 26 are respectively moved in the X-axis and Y-axis directions. The X-axis servo motor 24 and the Y-axis servo motor 26 are connected to the control panel 20 and controlled simultaneously.

  In this embodiment, in order to attach two game boards 28 on the table 22, a first jig 30 and a second jig 32 are provided so that the installation position can be adjusted. Each of the first jig 30 and the second jig 32 is provided with a pair of reference pins 34. The pair of reference pins 34 are used to connect the game boards 28 to the first jig 30 and the second jig. Position and attach to a predetermined position on the tool 32. Each of the first and second jigs 30 and 32 is provided with means for detecting the presence or absence of the game board 28.

  In addition, a nail detection device 36 for detecting whether or not nails are erected on the two game boards 28 mounted on the table 22 is installed at a predetermined portion near the table 22 of the apparatus body 10. ing. The nail detection device 36 may be composed of various sensors such as an optical sensor and an electromagnetic sensor.

  The two game boards 28 attached to the table 22 are each subjected to nailing by the processing unit 14 using a cam mechanism. The processing unit 14 performs a nail supply operation and a nail driving operation in conjunction with the cam mechanism. The cam mechanism is configured to transmit the rotational force of the AC servomotor 38 to the cam main shaft 42 via the speed reducer 40 and rotate the cam.

  The cam main shaft 42 is provided with two sets of six cams, that is, a holder vertical cam 104, a holder front / rear cam 106, a hammer vertical cam 108, a separation cam 110, a pushing cam 112, and a forced discharge cam 114.

  The cam main shaft 42 is provided with a pulley 44 for transmitting rotational force, and a timing belt 50 is wound around the driven pulley 48 of the gear box 46 to transmit the rotational force. The gear box 46 is connected to the rotary index 52 and transmits the rotational force input from the driven pulley 48 to the rotary index 52.

  As shown in FIG. 3, two rotary indexes 52 are arranged side by side so as to correspond to the two game boards 28 on the table 22. In each rotary index 52, four holders 54 for holding nails one by one are arranged in a cross shape, and these four holders 54 are integrally rotated and placed at a central angle of 90 degrees. It is configured to stop at a predetermined quadrant angle position. That is, by installing an intermittent mechanism in the rotary index 52 and converting the continuous rotational motion transmitted from the gear box 46 side into an intermittent rotational motion in which the central angle is rotated 90 degrees and then rotated again, four pieces are converted. The holders 54 are stopped at predetermined four positions.

  A parallel cam or a roller gear cam generally used as an intermittent mechanism used for the rotary index 52 can be used. For example, the parallel cam is a kind of conjugate cam, and is a cam that intermittently moves by sequentially feeding two rows of follower rollers by two plate cams.

  The four parts where each holder 54 of the rotary index 52 stops are a nail supply part 56, a nail presence / absence detection part 58, a nail driving part 60 and a nail discharge part 62.

  As shown in FIG. 4, the holder 54 attached to the rotary index 52 is configured such that a pair of rectangular members 66 are opened at a predetermined interval, and an intermediate portion thereof is pivotally supported by a shaft pin 68 so that a tip portion can be opened and closed. Yes. The front end portion of the holder 54 is formed to be tapered at a corner, and one rectangular member 66 is partly cut off and held by nail in the opposite side front end portions of the pair of rectangular members 66. The holding portion 70 for this is formed with a V-shaped holding groove portion 70A. A compression coil spring 72 is installed between the opposing side surfaces of the rear end portions of the pair of rectangular members 66, and elastically presses between the tip portions of the pair of rectangular members 66.

  In one rectangular member 66 provided with the holding groove portion 70A, a small column body 74 is erected at a predetermined position on the tip side of the shaft pin 68 that contacts the upper surface in the drawing, and a roller member 76 is axially attached to the front side surface thereof. Yes.

  When each holder 54 reaches the nail supply unit 56 as shown in FIG. 3, one nail is supplied from a feeder 78 connected to the nail supply device.

  As shown in FIGS. 5 to 11, the supply machine 78 is provided with a nail conveying unit 80, a nail separating and feeding unit 82, and a nail passing unit 84.

  As shown in FIGS. 1 and 2, the nail conveyance unit 80 conveys the nails 86 in a row from the nail supply device 16 to the nail passing unit 84. For this reason, a pair of long plates are arranged in parallel with an interval through which the shaft portion of the nail 86 is passed, and aligned so that the heads of the nail 86 are suspended on the upper ends of the pair of long plates. The nail 86 is conveyed while the head of the nail 86 slides on the upper ends of the pair of long plates.

  Near the end of the nail transfer part 80 on the side of the nail passing part 84 is formed in an inclined part 81 that faces downward toward the tip at an angle of 45 degrees, and the side surfaces of the pair of long plates in the inclined part are Are opened in a series. The leading end of the nail transport unit 80 is provided with an introduction port 90 for introducing a single nail 86 into the nail passing part 84, and an open / close lid 92 is provided at the free end to open and close the closed state. The nail 86 is held on the lid 92, and the open / close lid 92 is opened in accordance with the supply timing, and the nail 86 is dropped into the nail passing portion 84.

As shown in FIGS. 6, 7, and 11, the nail separating / feeding portion 82 includes a slider that moves slidably on a sliding guide member 94 disposed in a direction orthogonal to the bottom of the nail conveying portion 80. The material 96 is arranged on both sides of the nail transporting part 80 with a predetermined interval, and these are connected so as to move integrally. Each slider member 96 is provided with a support plate 98 standing upright, and protrudes at a predetermined position of each support plate 98 so that the distal ends of the separation support rods 100 and 102 can enter and exit the opening 88, respectively. It is installed. These separating supports 100 and 102 are arranged so as to be parallel with an interval slightly larger than one nail 86. Then, the pair of slider members 96 reciprocates once between two predetermined positions on the sliding guide member 94, whereby two nails 86 on the inclined portion 81 of the nail transport unit 80 are provided. The nail 86 enters between the separating supports 100 and 102, and one nail 86 is separated and sent to the front end side of the nail conveying section 80 from this point. In this way, the nails 86 are separated and sent one by one.

  The nail separating operation in the nail separating and feeding unit 82 is executed in conjunction with the cam mechanism. That is, as shown in FIG. 11, in this cam mechanism, one end of the swing follower 116 whose middle is pivotally supported by the apparatus main body is brought into rolling contact with the outer peripheral cam surface of the separation cam 110 of the cam main shaft 42, and the other end is the first. The support 118 is linked to one arm of the swing member 120. The base portion of the swing member 120 is pivotally supported by the apparatus main body, and the other arm portion is interlocked with the slider member 96 via the second support rod 122. As a result, the sliding member 96 reciprocates a predetermined distance on the sliding guide member 94 as the separation cam 110 rotates.

  The cam mechanism of the nail separating and feeding unit 82 is provided with a lockup device 121 controlled by the control plate 20. The lockup device 121 is disposed near the end of the swing follower 116 where the first support 118 is connected, and the rod of the lockup device 121 pushes up the receiving plate 123 provided on the swing follower 116. The swing follower 116 is locked up from the separation cam 110 so as not to come into contact with the cam even at the maximum lift position, and the supply of the nail 86 is stopped.

  Further, as shown in FIG. 5, immediately after being separated by the nail separating and feeding portion 82, the tip of the nail 86A is inclined rightward as shown in the drawing, as indicated by a two-dot chain line. Therefore, a nozzle 91 is provided in the nail transport unit 80, a compressed air supply source (not shown) is connected to the nozzle 91 through a hole 93, and the compressed air supplied from the compressed air supply source is supplied from the nozzle 91 to the tip of the nail 86A. The nozzle is sprayed toward the head, and the tip side of the nail 86A is rotated clockwise as shown in the figure. The nail is placed along the front side surface of the introduction port 90, and then the nail 86 is moved to the opening / closing lid 92 side. It is configured to drop into

  The nails 86 separated by the nail separating and feeding unit 82 are fed one by one from the introduction port 90 to the nail passing unit 84. The nail passing portion 84 includes a nail insertion assisting device 124 and a nail pushing device 126.

  The nail insertion assisting device 124 is configured as shown in FIGS. 5 to 10, and is disposed below the introduction port portion 90 at the tip of the nail conveying portion 80 in the feeder 78. The nail insertion assisting device 124 is provided with a pair of holding members 128 and 130. One holding member 128 is formed as a relatively long member, and an intermediate portion thereof is pivotally supported by a shaft pin 132. The other holding member 130 is formed of a relatively short member, and a base end portion thereof is pivotally supported by a shaft pin 134. In addition, the position from the front-end | tip of a pair of clamping members 128 and 130 is set equally about the position of each axial pin 132,134.

  These clamping members 128 and 130 are urged in a direction in which they are in contact with each other by a spring member (not shown). Further, between the pair of holding members 128, 130, the nail 86 elastically spreads the holding members 128, 130 so that the nail 86 is passed in the length direction of the nail 86 and the direction perpendicular thereto. A groove 136 is provided.

  Further, as shown in FIG. 8, a substantially inverted triangular guide groove 138 for guiding the nail 86 delivered from the introduction port 90 to the through groove 136 is formed in the structure portion of the nail insertion assisting device 124. Yes.

  At the boundary between the guide groove 138 and the through-groove 136, the tip indicating portion of the auxiliary member 140 of the nail run-out prevention mechanism is faced so that the nail 86 inserted into the through-groove 136 does not shake laterally in the traveling direction. Let me guide you. As shown in FIG. 10, the auxiliary member 140 has a planar saddle shape and a side saddle shape, and its vertical side portion 140 </ b> A is fastened to the block member 142.

  The block member 142 is pivotally supported by the structural portion of the nail insertion assisting device 124 by a shaft rod 144 that is fixed through the central portion. A mounting hole 146 is formed in a side surface portion of the block member 142 opposite to the fastening portion of the auxiliary member 140, and an interlocking support 150 having a spherical portion 150 </ b> A formed at the tip interlocking with the operation member 148 in the mounting hole 146. It is fastened.

  The operation member 148 has a substantially rectangular shape, forms an interlocking groove 148A for inserting the ball portion 150A of the interlocking support, and is installed with a shaft rod 152 projecting from the center portion pivotally supported by a structure portion (not shown). ing. The interlocking support 150 provided on the block member 142 is eccentrically positioned at the upper end portion of the shaft rod 152 in the drawing. An operated member 154 protrudes from the shaft rod 152 of the operating member 148 at a position eccentric to the lower end in the drawing.

  The operated member 154 is configured by fastening a roller portion 158 to a free end portion of a shaft rod 156 with a mounting nut 160 so as to be rotatable. Similarly to the operated member 154, an operation complementing member 168 formed by a roller portion 164 being pivotally supported by a shaft rod 162 and fastened by a nut 166 is projected from the structure portion. A tension coil spring 170 is installed between the shaft rod 156 of the operated member 154 and the shaft rod 162 of the operation complementing member 168, and biases the operated member 154 toward the operation complementing member 168 side. To do.

  The thus-configured nail lateral swing prevention mechanism has an operation member 172 having a wedge-shaped portion described later shown in FIG. 11 between the roller portion 158 of the operated member 154 and the roller portion 164 of the operation complementing member 168. Insert and spread between the two.

  As a result, the operated member 154 is pushed and moved in the direction of arrow A in FIG. 10 to rotate the operating member 148 in the direction of arrow B. According to this operation, the interlocking support 150 swings in the direction of arrow C, and rotates the block member 142 and the auxiliary member 140 integrated therewith in the direction of arrow D. Then, the tip support portion of the auxiliary member 140 is released from the position along the through groove 136 and released from the nail 86 inserted into the through groove 136 as can be seen from FIGS. 8 and 9.

  When the operated member 154 is released from the operating member 172, the tip pointing portion of the auxiliary member 140 is returned to the position along the through groove 136 by the urging force of the tension coil spring 170 by the reverse operation. .

  As shown in FIGS. 5 and 11, the nail pusher 126 of the nail passing portion 84 includes a pedestal 176 slidably mounted on a rail 174 fixed to the apparatus body 10, and a nail pusher installed on the pedestal 176. A member 178 and an operation member 172 are provided.

  The operation member 172 is provided with a pair of left and right oblique sides 172A that are tapered toward a free end facing downward, and a thin plate-like protrusion 172B that protrudes from the center.

  When the operation member 172 is lowered to a predetermined position, the pair of oblique sides 172A enters between the operated member 154 and the operation complementing member 168 shown in FIGS. 6 and 10, and the pair of oblique sides 172A The operated member 154 is moved to a predetermined position so as to push and spread while rolling on the two roller portions 158 and 164.

  The nail pushing member 178 has a round bar-like push rod 180 projecting from the tip of the nail pushing member 178 for pushing the head of the nail 86 in the guide groove 138. The push rod 180 has a flat concave spherical surface similar to the head of the nail 86.

  As shown in FIGS. 8 and 9, the push bar 180 is inserted into the guide groove 138 to a predetermined position, and its head hits the head of the nail 86, and pushes the nail 86 into the groove 136. During this operation, the auxiliary member 140 guides the nail 86 so as not to sway at the entrance of the through groove 136, so that the nail 86 is inserted straight along the through groove 136. As a result, the tip of the nail 86 is inserted into the holding groove 70 of the holder 54 positioned so as to communicate directly below the through groove 136.

  During this operation, when the tip of the push rod 180 approaches the position of the auxiliary member 140, the operated member 154 shown in FIG. 6 and FIG. In conjunction with this, the tip support portion of the auxiliary member 140 is separated from the through groove 136, so that the push bar 180 is not prevented by the auxiliary member 140, and the head of the nail 86 passes through the through groove 136 below the auxiliary member 140. Insert to the predetermined position.

  The operations of the nail pushing member 178 and the operation member 172 as described above are executed by interlocking the base 176 with a cam mechanism as shown in FIG. For this reason, the rolling member 184 whose base end is pivotally supported by the free end of the driven member 182 pivotally supported by the apparatus main body is in rolling contact with the outer peripheral cam surface of the pushing cam 112 of the cam main shaft 42. The free end portion of the driven member 182 is linked to one arm portion of the first swing member 188 by the first support 186. The base portion of the first swing member 188 is pivotally supported by the apparatus main body, and the other arm portion is interlocked with the arm portion of the second swing member 192 through the second support rod 190. The base portion of the second swing member 192 is pivotally supported by the apparatus main body, and the other arm portion is interlocked with the base 176 via the third support rod 193. Accordingly, the nail pushing member 178 and the operation member 172 are reciprocated by a predetermined distance integrally with the base 176 in accordance with the rotation of the pushing cam 112.

  As described above, when the tip of the nail 86 is supported by the holder 54, the rotary index 52 is rotated by 90 degrees. As a result, the head side of the nail 86 protruding from the holder 54 is pulled out from the through groove 136 of the nail insertion assisting device 124 while pushing the pair of holding members 128 and 130 in a lateral direction perpendicular to the axis of the nail 86. It is. And it is conveyed to the nail presence-and-absence detector 58 shown in FIG.

  As shown in FIGS. 12 and 13, the nail presence / absence detection unit 58 detects the body portion of the nail 86 protruding from the holder 54 at the free ends of the two columns 194 suspended from the apparatus body 10. The sensor 196 is provided. In this embodiment, an optical sensor is used as the sensor 196, and when the nail 86 is positioned on the optical path L indicated by the broken line of the optical sensor 196 and the optical path L is blocked, the nail 86 is held in a normal state. If the optical path L is not blocked, it is detected that there is no nail 86. Note that various sensors such as a sensor using electrical properties or sound can be used as the sensor 196.

  A detection signal of the sensor 196 is sent to the control panel 20. The nail presence / absence detecting portion 58 is arranged corresponding to each of the two rotary indexes 52. When the nail 86 is supported by both the holders 54, the next nail shown in FIG. When the nail driving operation is executed by the driving portion 60 and it is detected that the nail 86 is not supported by one or both of the holders 54, the nail driving operation is not performed.

  After the detection by the nail presence / absence detection unit 58, the rotary index 52 is rotated by 90 °, and the holder 54 is moved to the nail driving unit 60 as shown in FIG.

  As shown in FIGS. 14 to 18, the holder 54 sent to the position of the nail driving portion 60 is mounted on the rotary index 52 via an advance / retreat mechanism and an elevating mechanism.

  The holder 54 is mounted on a machine base 198 of an advance / retreat mechanism, and a substantially trapezoidal pressing member 200 is attached to the bottom of the holder 54. An elastic presser member 202 made of rubber or the like is provided on the bottom surface of the presser member 200. Further, since the rotary index 52 is provided to be inclined with respect to the surface of the XY table 22, when the holder 54 is positioned at the nail driving portion 60, the bottom surface of the pressing member 200 is connected to the game board 28 on the XY table 22. The bottom surface of the pressing member 202 is formed in an oblique shape so as to be parallel.

  The machine base 198 to which the holder 54 is attached is slidably attached to an advancing / retreating guide rail 204 extending in the lateral direction as viewed in the figure. Also, as shown in FIG. 17, a bracket 206 provided on the machine base 198 is provided with a support rod 208 projecting sideways, and the support rod 208 is inserted through the loose insertion opening of the bracket 210 provided on the advance / retreat guide rail 204 side. By placing a compression coil spring 212 between the free end stopper of the support rod 208 and the bracket 210, the holder 54 is urged to reach the retracted position shown in FIG. As shown in FIG. 14, the machine base 198 is provided with a member 214 to be operated that rises in a bowl shape, and an engagement roller 216 is pivotally supported at the free end thereof.

  A column member 218 that rises at a right angle is provided on the advance / retreat guide rail 204 and is slidably mounted on the vertical rail 222 of the rotary index 52 via a sliding support member 220 fixed to the column member 218. A supporting roller 224 is pivotally supported at an upper position in the figure of the column member 218.

  The support roller 224 is disposed in the apparatus main body 10 so as to surround the periphery of the rotary index 52, and rolls in the groove 226B of the guide ring 226 formed in a groove shape whose cross section is open to the center side. ing. Further, the position corresponding to the nail driving portion 60 of the guide ring 226 is cut out by a predetermined width as shown in FIG. 18, and an elevating operation member 228 is disposed in the cutout portion 226A.

  The elevating operation member 228 is provided with a groove 228A having the same cross-sectional shape as the guide ring 226. When the elevating operation member 228 is aligned with the notch 226A, the groove 226B and the groove 228A are aligned and continuous, An annular groove is formed.

  Therefore, the supporting roller 224 can roll around the annularly connected grooves 226B and 228A. For this reason, the load applied to the column member 218 is received by the guide ring 226 and the lifting operation member 228 via the supporting roller 224, so that the machine base 198 portion of the holder descends along the vertical rail 222 from its standby position with its own weight. Without this, the holder 54 can move by rotating each position of the nail supply unit 56, the nail presence / absence detection unit 58, the nail driving unit 60, and the nail discharge unit 62.

  As shown in FIG. 18, the elevating operation member 228 is moored to the driven member 230 and is movably mounted along a vertical rail 234 fixed to the apparatus main body via a sliding holding member 232.

  The raising / lowering operation member 228 is moved up and down by a cam mechanism. The base end portion of the raising / lowering operation member 228 is supported by the free end portion of the driven member 236 that is pivotally supported by the apparatus main body. A shaft-supported rolling member 238 is in rolling contact. The free end portion of the driven member 236 is interlocked with one arm portion of the swinging member 242 by the support 240. A central portion of the swing member 242 is pivotally supported by the apparatus main body, and a roller 244 is pivotally supported by the other side of the arm portion. The roller 244 of the swing member 242 is in rolling contact with the transverse groove 246 of the driven member 230. As a result, the lifting operation member 228 reciprocates a predetermined distance integrally with the driven member 230 in accordance with the rotation of the holder vertical cam 104. At this time, the holder 54 positioned in the nail driving portion 60 is in a state where the supporting roller 224 of the support member 218 is positioned and supported in the groove 228 </ b> A of the lifting operation member 228. Lift up and down.

  When the holder 54 moves up and down from the standby position as described above, the engaging roller 216 of the operated member 214 enters between the two holding rods 250 of the advance / retreat operating member 248. As shown in FIG. 17, the advance / retreat operation member 248 is formed in a bowl shape and is slidably mounted on a guide rail 253 fixed to the apparatus main body via a slide guide member 252.

  The advance / retreat operation member 248 is operated to advance / retreat by a cam mechanism. In this cam mechanism, a roller 256 having a shaft supported on one arm of a guide rail 253 pivotally supported by the apparatus main body is rolled on the outer peripheral cam surface of the cam front and rear cam 106 of the cam main shaft 42. Yes. The intermediate position of the other arm portion of the guide rail 253 is linked to one arm portion of the swinging member 260 by the first support 258. The base end portion of the swing member 260 is pivotally supported by the apparatus main body, and the other arm portion is interlocked with the advance / retreat operation member 248 by the second support rod 262. Thereby, the advance / retreat operation member 248 moves forward and backward by a predetermined distance in accordance with the rotation of the holder front / rear cam 106. During this operation, since the engaging roller 216 is held between the holding rods 250 of the advance / retreat operation member 248, the holder 54 together with the machine base 198 performs an advance / retreat operation in conjunction with the advance / retreat operation member 248.

  The cam mechanism related to the holder front-rear cam 106 described above is provided with a lockup device 288 controlled by the control panel 20 as shown in FIG. The lock-up device 288 is arranged directly below the receiving plate 254A provided at the free end of the arm that pivotally supports the support 258 of the driven member 254. Based on a command from the control panel 20, the lock-up device 288 locks up the driven member 254 from the holder front / rear cam 106 at the maximum lift position of the cam by pushing up the receiving plate portion 254A. In the lock-up state of the lock-up device 288, the advancing / retracting operation member 248 interlocked with the holder front / rear cam 106 is stopped at the rearmost position, and no forward movement is performed.

The advancing / retreating mechanism and the lifting / lowering mechanism of the holder 54 in the nail driving unit 60 configured as described above are used when the nail presence / absence detection unit 58 confirms that both the holders 54 hold the nail 86. Operation is performed. In this case, in the nail driving portion 60, the holder 54 avoids the nail 86 that is already erected on the game board 28 moved together with the XY table 22, and the nail 86 held by the holder 54 is predetermined. for positioning carrying of the nail driving tool position, the such operation is shown in operation diagram of FIG. 20 which is a combination of vertical movement and forward and backward operation the holder 54. First, as a first stage 264, the holder 54 at the position shown in FIG. 14 is lowered by 12 millimeters from a height of 20 millimeters from the board surface by the action of the holder vertical cam 104. Holder vertical cam 104 as shown in FIG. 15, the second stage 266 and the holder back and forth the holder 54 with both of the action of the cam 106 is downwardly convex arcuate trajectory drawing memorial to 6mm drop and 6mm forward Make complex actions.

  Next, in a third stage 268, the holder 54 is advanced by 6 millimeters and stopped by the action of the holder front and rear cams 106. Following this, in the fourth stage 270, first, the holder 54 is lowered by 2 millimeters by the action of the holder upper and lower cams 104 to reach the state shown by the solid line in FIG. 16, and then the holder 54 is further lowered by about 1 millimeter. The elastic pressing member 202 is pressed against the surface of the game board 28 as indicated by a dotted line.

By moving the holder 54 in this way, the nail 86 held by the holder 54 can be positioned at a predetermined nail driving position, and can be positioned adjacent to the vicinity of the nail 86 that has already been driven. Further, in a state where the nail 86 is positioned and held at the nail driving position , the position of the game board 28 and the holder 54 is displaced due to the frictional force when the elastic presser member 202 pressed against the surface of the game board 28 comes into close contact. It can be supported with certainty.

  In this way, with the holder 54 positioning the nail 86 at the nail position on the game board 28 as shown in FIG. 16, the hammer 272 makes the nail 86 to the game board 28 at a predetermined angle from the surface, And, it is driven so as to protrude a predetermined height.

  The hammer 272 is integrally attached to the substrate 274 as shown in FIG. Further, an operation member 280 for the roller member 76 is attached to the substrate 274. The substrate 274 is slidably mounted on a guide rail 278 fixed to the apparatus main body via a sliding guide member 276. Note that the nail hammering portion 272A of the hammer 272 has a flat concave spherical surface so that the head of the nail 86 is covered as shown in FIG. Further, since the tip of the nail 86 has a screw-like groove, when the nail is driven, the nail rotates, so that the head of the nail is rubbed and damaged. In order to prevent this scratch, the hammer 272 is provided with a bearing (not shown) so that the nail striking portion 272A is rotatable with respect to the hammer 272.

  The hammer 272 and the substrate 274 having the operation member 280 are reciprocally slid by a cam mechanism. In this cam mechanism, a roller 284 whose base end is pivotally supported by a free end of a driven member 282 pivotally supported by the apparatus main body is brought into rolling contact with the outer peripheral cam surface of the hammer upper and lower cams 108 of the cam main shaft 42. The free end portion of the driven member 282 and the substrate 274 are interlocked by a support 286. As a result, the substrate 274 moves up and down a predetermined distance according to the rotation of the hammer vertical cam 108. In this operation, as can be seen from FIG. 16, as the substrate 274 is lowered, the hammer 272 drives the nail 86 into the game board 28, and the nail 86 is driven to such a length that the nail 86 is not tilted by the operation of the hammer 272. At this stage, the operation member 280 hits the roller member 76 of the holder 54 and pushes it to open between the holding groove portions 70A of the pair of rectangular members 66 of the holder 54, thereby releasing the held nail 86. Thereafter, the hammer 272 drives the nail 86 to a predetermined height position.

Furthermore, while the operating member 280 acts on the roller member 76 to open the holding groove 70 and release the nail 86, the holder 54 is actuated by the holder up-and-down cam 104 and the holder front-and-back cam 106, as described above. in operation of the operation substantially opposite that shown in FIG. 20 is shown in FIG. 14 returns to those initial position. When the holder 54 is separated from the nail 86 in which the holder 54 is driven, the hammer 272 and the operation member 280 are higher than the head of the nail 86 driven on the game board 28 shown in FIG. to return to the person first position of more 20 mm of height.

Next, when the above-described nail presence / absence detection unit 58 detects that the nail 86 is not held in at least one of the holders 54, a nail driving avoiding operation is performed. This avoiding operation is executed by locking up the driven member 254 by the lock-up device 288 and preventing the advance / retreat operation member 248 from performing the advance operation. In this case, the holder 54 only moves up and down by the action of the holder vertical cam 104. Therefore, even if the holder 54 is not advanced and the nail is held on the holder 54, the holder 272 and the operation member 280 are not moved up and down because the holder 272 and the operation member 280 are not moved. Among the two holders 54 for the holder 54 to the nail 86 has been retained are returned to those initial position shown in FIG. 14 while holding the nail 86.

  As described above, when the nail driving operation or the nail driving avoidance operation is completed at the position of the nail driving portion 60, the rotary index 52 is rotated by 90 degrees and the holder 54 is moved to the nail discharging portion 62 as shown in FIG. Is done. At this time, since the holder 54 passes through a position higher than the head of the nail 86 struck against the game board 28, the holder 54 does not interfere with the nail 86.

  As shown in FIGS. 21 and 22, a nail discharge mechanism is attached to the nail discharge portion 62.

  In this nail discharge mechanism, a discharge member 294 is slidably mounted on a guide rail 290 fixed to the apparatus main body via a slide instruction member 292 as shown in the figure. The discharge member 294 is provided with a nail extraction opening 296 at the holder-side tip. For this reason, a support part 298 is integrally provided on the right side of the discharge member 294 in FIG. On the right end side of the support portion 298, there is provided a drawing member 302 that is formed one step longer and has a small rectangular protrusion 300 provided on the support portion 298 side of the free end thereof. Further, a pullout member 306 is provided on the left end side of the support portion 298 so as to be shortened by one step and provided with a small rectangular protrusion 304 on the support portion 298 side of the free end thereof. A nail extraction opening 296 that is surrounded by the support portion 298 and the two extraction members 302 and 306 and that opens to the front and back of the paper surface of FIG. 21 and below is formed.

  The discharge member 294 is reciprocated on the guide rail 290 by a cam mechanism. As shown in FIG. 22, this cam mechanism rolls a roller 311 at one end of a swing follower 310 pivotally supported by the apparatus body on the outer peripheral cam surface of the forced discharge cam 114 of the cam main shaft 42, The other end is linked to one arm portion of the swing member 314 by the first support 312. The other arm of the swing member 314 is interlocked with the discharge member 294 via the second support 316. As a result, the discharge member 294 reciprocates on the guide rail 290 from the predetermined nail receiving position to the nail discharge position in accordance with the rotation of the forced discharge cam 114. When the discharge member 294 is in the nail receiving position indicated by the solid line in FIG. 21, the nail 86 held by the holder 54 can be introduced into the nail extraction opening 296. That is, when the holders 54 come to the two nailing portions 60 respectively corresponding to the two game boards 28 on the XY table 22, the nail 86 is not held by either one of the holders 54. When the hitting operation is not performed, the other holder 54 is rotated to the nail discharge portion 62 indicated by a solid line in FIG. At this time, the nail 86 held by the holder 54 is introduced into the nail extraction opening 296 of the discharge member 294 that has been waiting at a predetermined nail receiving position. Next, when the discharge member 294 is pulled in the direction of arrow E by the cam mechanism, the two pull-out members 302 and 306 come together, and the small rectangular protrusion 304 is hooked on the nail head, etc. 54, the nail 86 is pulled out, and the nail 86 is discharged into a discharge container (not shown). In this operation, the flat plate 308 can prevent the nail 86 from dropping out from the nail extraction opening 296 to one side.

  The above-described nail discharging operation at the position of the nail discharging portion 62 is performed regardless of whether or not the nail 86 is held by the holder 54. After the nail discharging operation is completed, the rotary index 52 is rotated by 90 °, and the holder 54 is moved again to the nail supply unit 56 as shown in FIG.

  Next, the cam curves of the two sets of cam mechanisms interlocked with the cam main shaft 42 in the automatic nailing device of the present embodiment will be described. First, the intermittent mechanism of the rotary index 52 by the cam mechanism interlocked with the cam main shaft 42 by the winding conduction mechanism has a cam curve whose rotation angle of the cam main shaft 42 is 0 degrees as shown in the allocation angle diagram of FIG. The rotation shaft on which the four holders 54 of the rotary index 52 are mounted rotates 90 degrees from the center angle while rotating from 90 degrees to 90 degrees. Thereafter, the rotation of the cam spindle 42 is stopped during the period from 90 degrees to 360 degrees.

  Next, the holder vertical cam 104 does not move when the cam main shaft 42 rotates from the angle 0 degrees to the angle 70 degrees, and moves the holder 54 by the contact end displacement amount 18 mm between the angles 70 degrees to 147 degrees. Moves down, stops operation from angle 147 degrees to angle 158 degrees, descends holder 54 from angle 158 degrees to angle 193 degrees by the amount of displacement of the trailing end 3 millimeters, and stops holder 54 from angle 193 degrees to angle 232 degrees To do. Further, the holder 54 is lifted by an engagement end displacement amount of 3 mm from the angle 232 degrees to the angle 267 degrees, the holder 54 is stopped from the angle 267 degrees to the angle 293 degrees, and the center angle 77 degrees from the angle 293 degrees The holder 54 is raised by the amount of displacement of the contact end 18 millimeters until it rotates.

  Next, the holder front-rear cam 106 does not move from the angle 0 degree to the angle 108,5 degrees, and the cam front shaft 42 does not move from the angle 108,5 degrees to the angle 171,5 degrees. The holder 54 is moved forward, stopped from the angle 171, 5 degrees to the angle 267 degrees, the holder 54 is moved backward from the angle 267 degrees to the angle 330 degrees by 12 mm, and the holder 54 is moved from the angle 330 degrees to the angle 360 degrees. 54 is stopped.

  Note that the action of the holder up / down cam 104 and the holder front / rear cam 106 shown in FIG. 23 is combined to cause the holder 54 to perform the operation shown in FIG.

  Next, the hammer vertical cam 108 moves the cam main shaft 42 from the angle 0 degree to the angle 150 degrees, and lowers the hammer 272 from the angle 151 degrees to the angle 232 degrees by the contact end displacement amount of 20 millimeters. Stopping from the angle 232 degrees to the angle 279 degrees, the hammer 272 is raised from the angle 278 degrees to the angle 360 degrees by an amount of displacement of the trailing end of 20 millimeters. Next, the separation cam 110 does not move from the angle 0 degree to the angle 63 degrees, and the sliding of the nail separation feed portion 82 is 11 mm from the angle 63 degrees to the angle 124 degrees. The moving member 96 is moved to one side, stopped from an angle of 124 degrees to an angle of 299 degrees, and the slider material 96 is returned from the angle of 299 degrees to an angle of 360 degrees, thereby causing the opening / closing lid 92 to move around 90 degrees. The held nail 86 falls into the through groove 136.

  Next, the pushing cam 112 gently raises the nail pushing member 178 and the operation member 172 of the nail pushing machine 126 by the amount of displacement of the contact end 5 mm from the angle 345 degrees to the angle 15 degrees. Then, the concave spherical surface of the push rod 180 is released from the head of the nail 86, and is subsequently pushed down from the angle 15 degrees to the angle 90 degrees by the contact end displacement amount 25 mm. Further, the angle is stopped from 90 degrees to 255 degrees, the nail pushing member 178 and the operating member 172 are pushed down from the angle 255 degrees to 345 degrees by the displacement amount of the trailing end of 30 millimeters, and the angle is changed from 345 degrees to 360 degrees. Gently increase the contact end displacement by 2.5 mm. Note that a series of gentle raising operations are performed in the sections from the angle 345 degrees to the angle 360 degrees and the angle 0 degrees to the angle 15 degrees.

  Next, the forced discharge cam 114 moves the discharge member 294 from the angle 90 degrees to the angle 200 degrees by the contact end displacement amount 25 mm from the angle 0 degrees to the angle 90 degrees, while the cam main shaft 42 does not move from the angle 0 degrees to the angle 90 degrees. Then, the angle is stopped from the angle of 200 degrees to the angle of 250 degrees, and the discharge member 294 is returned to the original position from the angle of 250 degrees to the angle of 360 degrees. It should be noted that a rapid change in acceleration is prevented by using a relaxation curve for each cam curve of the cam mechanism described above, so that each operation of the automatic nailer is smooth and does not generate noise.

  Furthermore, the cam curves of the cam mechanism are not limited to those illustrated in FIG. 23, and may be configured to be cam curves that match the operation required by each cam mechanism. Further, a part of the interlocking support of each cam mechanism is elastically expanded and contracted, and when a load exceeding a certain level is applied, a part of this support contracts to absorb the load, and each cam mechanism It is desirable to configure so as to prevent damage.

  When performing the operation of hitting the nail 86 against the game board 28 by the automatic nail driving device of the present embodiment, the coordinates of the position where each nail 86 is hit is stored in the control board 20 using the operation panel 18 in advance. deep. Then, the operator sets the game board 28 on each of the first jig 30 and the second jig 32 on the XY table 22. Then, the detection means of each jig 30, 32 detects whether or not the game board 28 is on each jig 30, 32, and the control board 20 performs a nailing operation for the jig without the game board 28. Control to not. If the game board 28 that has already been nailed is set on the jigs 30 and 32 by mistake, the nail detection device 36 detects that the nail has been struck. Control not to do work.

  Further, when performing the operation of driving nails 86 to the respective game boards 28 on the first and second jigs 30 and 32 of the XY table 22, the control board 20 first makes an X based on the coordinate data of the nailing positions. The XY table 22 is positioned by drivingly controlling the servo motors 24 and 26 for the axis and the Y axis. At the same time, the AC servo motor 38 of the cam mechanism that performs nailing is driven. At this time, when the movement amount of the XY table 22 exceeds a certain distance and a predetermined time or more elapses from the position where the nail is struck to the position where the next nail is struck, the control unit takes this movement. Corresponding to the time, the rotational speed of the AC servo motor 38 of the cam mechanism is adjusted to a low speed so as not to stop, and the nail driving operation is performed after the positioning operation of the XY table 22 is completed. This is because when the AC servo motor 38 is stopped and then restarted after completion of positioning, the AC servo motor changes from a high speed rotation to a stop operation and from a stopped state to a high speed rotation due to the characteristics of the AC servo motor. Since a large amount of power is consumed and time is required, the rotational speed of the AC servo motor 38 is reduced so as to be able to wait for the alignment time without stopping the AC servo motor 38. By controlling in this way, it is possible to shorten the tact time of the work of repeatedly performing a series of operations from positioning to nailing, and improve work efficiency. Furthermore, since the nailing operation can be performed simultaneously on the two game boards 28, workability can be improved.

  In the nail driving device according to the present embodiment, four holders 54 are attached to the rotary index 52, and these four holders 54 are used to supply a nail during one rotation of the cam main shaft 42, to check whether a nail is present, The four steps of nailing and nail discharging are performed simultaneously. Further, each holder 54 is rotated and sequentially goes through these four steps to execute one cycle of operation. Thus, since four operations are simultaneously performed by the cam mechanism using the four holders 54, it is possible to prevent a timing shift between the four operations. At the same time, the supply efficiency of the nail and the nail driving can be performed at the same time as compared with the case where the nail supply is sequentially performed by one holder and the operation for nail driving is performed.

  If the sensor 196 detects that the nail presence / absence detection unit 58 does not have the nail 86 in one or both of the two holders 54, the control panel 20 performs the nail operation in the next nail driving unit 60. Control is performed so that the lockup device 288 is activated so that the nail 86 is driven at this position again. Further, when it is detected three times that the nail 86 is not in the holder 54, the control panel 20 stops the operation of the entire nail driving device.

  The operation of driving the hammer 272 at the nail driving portion 60 with the cam mechanism and driving the nail 86 is performed by adjusting the cam curve so that the hammer 272 hits the head of the nail 86 slowly and finishes driving. The head is stopped, noise is not generated, and the height of the head of the nail 86 is made constant. Further, each cam mechanism uses a relaxation curve of the cam so as not to generate an impact sound during operation.

  In the automatic nailing device of the present embodiment, the height position at a right angle from the plane of the XY table 22 is set with reference to the surfaces of the first and second jigs 30 and 32. That is, the back surface of each game board 28 placed on the first and second jigs 30 and 32 is used as a reference. Therefore, the height position of the head of the nail 86 struck against the back surface is determined. For this reason, when the game board 28 manufactured by the automatic nailing device according to the present embodiment is used by being attached to the machine frame of the pachinko machine, the reference of the height position at a right angle to the plane of the game board 28 matches. Therefore, the assembly accuracy of the pachinko machine can be improved, and the distance between the head of the nail 86 struck on the game board 28 and the glass surface of the pachinko machine can be made constant.

  In the nail discharge unit 62, the nail driving avoidance operation is performed in the nail driving unit 60, and the nail 86 held by the holder 54 is discharged. Therefore, the nail supply unit 56 again inserts the nail 86 in the state where the nail is held. Such a malfunction that the nail 86 is supplied can be prevented.

  As described above, when the operation of driving the nails 86 to the two game boards 28 is completed, the worker removes the completed game board 28 and places the game board 28 on which the new nailing is performed on the XY table 22. Set on the first and second jigs 30 and 32 and resume the work. Note that the nail discharged to the discharge container by the nail discharge unit 62 is discarded by the worker at an appropriate time.

The perspective view (best form) of the automatic nailing device of a game board. The side view (best form) of the automatic nailing device of a game board. Top view around the rotary index (best mode). The perspective view (best form) of a holder part. The side view of the nail supply part (best form). The perspective view from the diagonal front side of the feeder part of a nail (best form). The perspective view from the slanting side of the feeder part of a nail (best form). The side view of the nail insertion auxiliary machine part (best form). The top view of a nail insertion auxiliary machine part (best form). The perspective view (best form) of a nail insertion auxiliary machine part. The perspective view (best form) of a nail separation feed part and a nail pushing machine. The side view (best form) of the detection means of the nail hold | maintained at the holder. The front view of the detection means of the nail hold | maintained at the holder (best form). The side view (best form) of the raising / lowering mechanism and advance / retreat mechanism of a holder. The front view of the state in which the holder is nailed (best mode). The side view of the state in which the holder is nailed (best mode). The perspective view of the advance / retreat mechanism of a holder (best form). The perspective view of the raising / lowering mechanism of a holder (best form). The perspective view (best form) of the reciprocation mechanism of a hammer. The operation | movement diagram of raising / lowering of a holder, and advance / retreat (best form). A side view of the nail discharge mechanism (best mode). The perspective view (best form) of a nail discharge mechanism. Cam curve diagram (best mode). Sectional view of the hammer portion (best mode).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Apparatus main body 14 Process part 16 Nail supply apparatus 22 XY table 28 Game board 38 AC servo motor 42 Cam main axis 54 Holder 60 Nail driving part 86 Nail 104 Boulder vertical cam 106 Holder front-rear cam 272 Hammer

Claims (1)

The apparatus body is provided with an XY table, a processing part, and a nail supply device. The processing part is provided with a cam mechanism, a holder, and a hammer. The cam mechanism is a cam main shaft that is rotated by a motor. The game board is mounted on the XY table, the XY table is positioned based on the coordinate data of the nail driving position, and the holder that supports the nail supplied from the nail supply device is formed by the holder upper and lower cams at the nail driving portion. The nail is arranged between the game board and the hammer without contacting the game board and the hammer as it descends while drawing a downward arcuate locus by the action of the lowering and the forward movement by the holder front and rear cams. after, Han said holder, without having to go with the advancement by the holder before and after the cam, the nail with to descend drawing a line trajectory under the action of just lowering by the holder vertically cam The carry from the side to the side of the game board, the automatic nailing device of the game board to hammer a nail carried in the holder, characterized in that the implanting on the game board is lowered.

Images