JPS597611B2 - tape feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape feeding device for feeding any one of a plurality of electronic component holding tapes set in parallel by a predetermined length.

In recent years, it has become common practice to hold a large number of electronic components on a tape at equal intervals, and then feed the tape a predetermined length at a time using a tape feeding device, separating the electronic components one by one from the tape and supplying them to an electronic component mounting device. It began to be practiced.

To do this, engagement holes are bored at equal intervals along the length of the tape, and the tape feeding mechanism is provided with a sprocket with claws protruding from the outer circumferential surface that engage with the engagement holes. A technique is known in which a tape is fed by a predetermined length by rotating the tape by a predetermined angle. ．． However, no tape feeding device has yet been known that can quickly feed any number of tapes selected in any order from a plurality of tapes set in parallel over a predetermined length. The present invention aims to utilize such a tape feeding device as much as possible. The tape feeding device according to the present invention has been developed to provide a tape feeding device with a simple structure and low cost.To achieve this object, the tape feeding device according to the present invention has the following features: (1) to feed a plurality of tapes individually and independently; (2) a plurality of sprockets arranged in parallel, each having claws on its outer circumferential surface that engage with engaging holes drilled at equal intervals;
(3) a driving device including a plurality of output parts corresponding to the plurality of sprockets, and configured such that the plurality of output parts operate integrally; (4) a plurality of transmission mechanisms for respectively transmitting information to the sprockets and rotating them by a fixed angle; and (4) an actuator disposed between each of the transmission mechanisms and the plurality of output sections and attached to each of the transmission mechanisms. , a plurality of relay members that are selectively moved between a first position where the driving force of the output section is relayed to the transmission mechanism and a second position where the driving force is not relayed, and the actuation is performed in synchronization with the operation of the drive device. Based on an operation command given to each of the sprockets, only one selected from among the plurality of sprockets receives the driving force of the drive device and rotates at a certain angle, thereby feeding the tape a predetermined length.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 are diagrams showing an apparatus in which a tape 1 housed in a cartridge 2 is pulled out by a sprocket 4 at a constant length, cut by a cutting device 6, and supplied to a component conveying member 8. It is.

The cartridge 2 has two parallel side plates 10 and 11 (1
1 (see FIG. 5) are connected by a plurality of connecting members, and project from a backing plate 20 fixed to the positioning blocks 14 and 16 disposed on the support base 12 and the main body frame 18. is positioned by a positioning pin 22,
It is secured to the positioning block 16 by a wing nut 24. A large number of cartridges 2 are mounted in parallel on a support base 12, and each cartridge 2 accommodates a reel 26 around which the tape 1 is wound, and is rotatably supported by a pair of rollers 28. As shown in FIGS. 3 and 4, the tape 1 includes a cardboard tape 34 in which a rectangular electronic component housing hole 30 and a circular feeding engagement hole 32 are formed at regular intervals along the longitudinal direction, and An electronic component 36 is housed in the housing hole 30, covering the component housing hole 30 from both upper and lower sides.
It is made up of a thin and transparent upper tape 38 and lower tape 40 that prevent the tape from separating from the accommodation hole 30.

The tape 1 pulled out from the reel 26 is shown in FIGS.
As shown on an enlarged scale in the figure, it is configured to be guided by a guide groove 44 formed in a fixed guide 42 fixed to the cartridge 2 and fed by the sprocket 4.

Further, separation of the tape 1 from the guide groove 44 is prevented by a tape presser 50 which is rotatably attached to the cartridge 2 with a stepped screw 46 and is urged toward the fixed guide 42 by a spring 48. has been done. tape presser foot 5
0, the upper tape 38 of the tape 1 is peeled off from the cardboard tape 34, passes through the guide pin 52,
It is wound up on a take-up reel 54. The take-up reel 54 is rotatably attached to the cartridge 2 by a pin 56, and a lever 60 is biased by a spring 58 to rotate counterclockwise (in FIG. 5).
is attached to. A rubber ring 62 is attached to the outer periphery of the take-up reel 54, and the ring 62 contacts the drive roll 64 and is driven by frictional force. A stopper pin 66 is provided to prevent the lever 60 from rotating beyond a certain limit when the power cartridge 2 is removed.

A prong 70 is fixed to the tip of one side plate 11 of the cartridge 2, in which a recess 68 for accommodating the sprocket 4 and the like is formed.

As shown most clearly in FIG. 6, the sprocket 4 is press-fitted together with a gear 74 onto a rotating shaft 72 supported by the sprocket 70 and the other side plate 10. The relative phase of the sprocket 4 and the gear R4 is fixed by a pin 76, and the pawls 78 of the sprocket 4 and the teeth 80 of the gear 74 are provided at equal angular intervals. Two arms 82 are rotatably fitted onto the rotating shaft 72 with the sprocket 4 and gear 74 interposed therebetween. As shown in FIG. 5, feed pawls 84 are pivotally attached to these arms 82 by pins 86, and are biased by springs 88 in the direction of engagement with gears 74. On the other hand, a reverse rotation preventing member 90 and a locking pawl 92 are attached to the block 70. The anti-reverse member 90 is made of spring steel, and is bolted to the block 70 at its base end, and its tip constantly contacts the gear 74 due to its own elastic force, allowing forward rotation but preventing reverse rotation. It is like that. The locking pawl 92 is connected to the block 7 by a pin 94.
It is pivoted to 0. The locking pawl 92 is biased by a spring 96 in the direction of engaging the gear 74, but when the arm 82 is rotated downward by a certain angle or more, the pin 98 hooked over the arm 82 As shown in FIG. 5, the engagement with the gear 74 is released.

The upper end of the rod 100 is fitted between the pair of arms 82 and rotatably connected by a pin 102. The lower part of this rod 100 is a pair of links 104
The rod 70, arm 82, rod 100, and link 104 constitute a four-link mechanism, and the rod 100 always moves while maintaining a vertical posture. It's becoming like that. Note that the arm 82 is connected to its tip and the block 70.
It is urged to rotate downward by a spring 110 stretched between the block 70, but the limit of rotation is regulated by a stopper bolt 114 screwed into a bracket 112 fixed to the block 70. has been done. The patch plate 20
In the lower position, a block 116 is secured to the body frame 18 as shown in FIG.

A number of rods 118 are vertically and slidably attached to this block 116, corresponding to the rods 100 of each cartridge 2. A roller 120 is attached to the upper end of the rod 118.
18 is adapted to push up the rod 100. A moving member 124 as an output member of a solenoid 122 is fitted into the block 116 so as to be movable in a direction perpendicular to the sliding direction of the rod 118.
A relay pin 126 is fitted into 24 so as to be slidable in a direction parallel to the rod 118. As shown in FIG. 1, the movable member 124 is always in a position where the lower end of the relay pin 126 is disengaged from the elongated plate 130 serving as the output part of the drive device 128 disposed below, and the solenoid 122 is When energized, relay pin 126 connects to plate 1.
It is designed so that it can be moved to a position directly above 30. Note that the head 132 of the relay pin 126 does not come off the rod 118 in any of the above positions, and supports the rod 118 from below.
The drive device 128 includes a rotating plate 136 that holds the plate 130 at one end and is rotatably supported by a shaft 134 in the middle.

The other end of the rotating plate 136 is connected to a connecting rod 138 and pins 140, 1
42 to one arm 146 of lever 144 shown in FIG. The lever 144 is pivotally supported by a bracket 148 fixed to the main body frame 18, and has two arms 150 and 152 in addition to the arm 146 described above. Rollers 154, 156 (156 not shown) as cam followers are attached to the tips of the arms 150 and 152, and these rollers 154, 156
are adapted to follow cams 160 and 162 fixed to the drive shaft 158, respectively. Further, cams 176 and 178 are fixed to the drive shaft 158 for raising and lowering the movable blade holder 174 via rollers 164 and 166, a lever 168, a link 170, and a sliding body 172.

The lever 168 has an arm 180 that is bifurcated at its tip, and a sliding body 172 is connected to each tip by a link 170, as shown in FIG. These sliding bodies 172 are held by brackets 182 fixed to the frame body 18 so as to be slidable in the vertical direction.
A horizontally long movable blade holder 174 is fixed to the lower ends of these blades. A large number of movable blades 184 are arranged on the movable blade holder 174 in correspondence with the large number of cartridges 2.
Each movable blade 184 is attached to the movable blade holder 174 so as to be able to slide vertically but not rotate.
88 , the retaining ring 190 is forced downwardly by the upwardly facing wall 19 of the groove 192 formed in the movable blade holder 174 .
It is stationary in contact with 4. In cooperation with the movable blade 184, the tape 1 (more precisely, from the tape 1 to the upper tape 38
A fixed blade 196 for cutting the tape (from which the tape has been peeled off) is fixed to the above-mentioned backing plate 20 shown in FIG. The tape 1 is cut by lowering the movable blade 184 while being fitted between the portion 198 and the pressing spring 200. Further, as shown in FIG. 5, on the backing plate 20, a light emitting element DO2 and a light receiving element 204 of a photoelectric detector are attached in close proximity to the fixed blade 196, and electronic parts are inserted into the electronic parts housing hole 30 of the tape 1. 3
6 is accommodated, and if it is not accommodated, the operation of the entire device can be stopped.

Next, the operation will be explained.

If none of the solenoids 122 are energized in FIG. 1 and all the relay pins 126 are in a position removed from the plate 130, the drive shaft 158 in FIG. Even if it is rotated counterclockwise in the figure, the plate 130 serving as the output section will not push up the relay pin 126.

Therefore, the transmission mechanism from the rod 118 to the gear 74 does not operate at all, and the sprocket 4 does not rotate at all. Therefore, none of the many tapes 1 set in parallel are fed, and even if the drive shaft 158 further rotates and the movable blade 184 is lowered, the tape 1 will not be cut. However, some of the solenoids 122 (one or more are possible) are energized, and the rotating plate 136 is rotated counterclockwise with some of the relay pins 126 being directly above the plate 130. These relay pins 126 are pushed up all at once by the play opening 30, and the rod 118 is pushed up.

Since the rod 118 is pushed up and the arm 82 is rotated upward, the feed pawl 84 moves upward and the gear 7
4 and the sprocket 4 fixed thereto counterclockwise. At the beginning of this operation, the locking pawl 92
is detached from the gear 74, but as the arm 82 rotates upward, the locking pawl 92 rotates and its tip approaches the gear 74. The tip of the locking pawl 92 is the gear 74.
When the pin 98 comes into contact with the tip of the tooth 80 , the pin 98 separates from the locking pawl 92 . Further, the arm 82 rotates and the gear 74
When rotated, the tip of the locking pawl 92 fits between two adjacent teeth 80 of the gear 74, stopping the rotation of the sprocket 4 at an accurate position. During this time, sprocket 4
rotates by a predetermined angle together with the gear, and feeds the tape 1 a length corresponding to one pitch of the electronic component housing hole 30. The leading end of the tape 1 that has been fed is fitted between the receiving portion 198 of the component conveying member 8 and the pressing spring 200. Also, the upper tape 38 is peeled off from the tape 1 by the length that the tape 1 is fed, and the take-up reel 5
It is wound up in 4. Even if the drive shaft 158 further rotates, the rotating plate 136 cannot be rotated any further (the shape of the cam is determined in this manner), and eventually the movable blade 184
is lowered.

As a result, by energizing the solenoid 122, the selected
Several tapes 1 that have been fed by one pitch are cut at the same time. At this point, the locking pawl 92 is engaged with the gear 74, so the sprocket 4 does not rotate freely, and the tape 1 is cut while being accurately positioned by the sprocket 4. Subsequently, the movable blade 184 is raised and the rotating plate 136 is rotated clockwise.

As the rotating plate 136 rotates, the relay pin 126 and the rods 100, 118 are lowered, and the arm 82 is connected to the spring 11.
It is allowed to be rotated downward by an elastic force of 0. As the arm 82 rotates downward, the feed claw 84 also moves downward, passes over one tooth 80 of the gear 74, and engages with the next tooth 80. At this time, a moment in the reverse direction acts on the gear 74, but since the reverse rotation is prevented by the reverse rotation prevention member 90, the gear 74 does not reverse rotation. In the later stages of downward rotation of the arm 82, the pin 98 comes into contact with the locking pawl 92, causing it to separate from the gear 74. Relay pin 126
after the head 132 of the first
Return to the position shown in the figure. This completes one cycle of operation, but after the component conveying member 8 has been sent a certain distance, some of the solenoids 122 are energized again, and the next cycle is started.

By repeating such operations, arbitrary electronic components 36 are supplied to the component transport member 8 from a large number of cartridges 2. Another embodiment of the invention is shown in FIG.
Since this embodiment is basically almost the same as the above embodiment, the same reference numerals are given to each component that performs the same function to indicate the correspondence with the above embodiment, and a detailed explanation will be omitted. Omitted. The tape presser 50, which was pressed against the fixed guide 42 by the spring 48 in the above embodiment,
In this embodiment, the screw member 220 is fixed to the fixed guide 42 by a screw member 220 attached to the distal end portion so as to be movable and rotatable by a fixed dimension in the axial direction.
By removing the tape presser 50 from the fixed guide 42, the tape presser 50 can be rotated and retracted from the fixed guide 42.

Also, one locking member 222 is provided in place of the reverse rotation preventing member 90 and the locking pawl 92 that holds the gear 74 at a predetermined rotational phase position, which were provided in the above embodiment to prevent the gear γ4 from reversing. It is used.

The locking member 222 is a guide member 2 fixed to the block 70.
24 so as to be slidable in the axial direction, and is biased by a spring 226 in a direction to engage the gear 74. The locking member 222 has a gently sloped surface 228.
A pointed end having a steeply sloped surface 230 is provided, and this pointed end positions the gear 74 by fitting into the tooth groove of the gear 74. The locking member 222 has a sloped surface 228 with a gentle slope when the feed pawl 84 rotates together with the arm 82 to rotate the gear 74 in the counterclockwise direction.
The gear 74 is pushed down against the biasing force of the spring 226, allowing rotation of the gear 74, but rotation of the gear 74 in the opposite direction is prevented by the steep slope 230. That is, this locking member 222 also serves as a member for preventing the gear 74 from reversing. Further, by loosely inserting the lower end of the rod 100 for rotating the arm 82 into the through hole formed in the guide plate 232, the rod 100 can be moved in the axial direction and Accordingly, it is made to be able to tilt slightly.

In this embodiment, the plotter 116, rod 118, roller 120, etc. in the previous embodiment are omitted, and the head 132 of the relay pin 126 directly connects the
It is made to abut on the lower end of 0. Relay pin 126
is an L-shaped bracket 234 fixed to the main body frame 18.
The solenoid 122 is loosely inserted into the through hole of the solenoid 122.
It is also loosely inserted into the through hole of the moving member 124, which is the output member of the drive device 128, and is normally tilted as shown by the two-dot chain line and positioned away from the plate 130, which is the output member of the drive device 128. However, when the solenoid 122 is energized, it is moved to a position interposed between the rod 100 and the plate 130 as shown by the solid line, and the rotating plate 1
The upward movement of the plate 130 accompanying the rotation of the rod 1
00 to rotate the arm 82. Although this embodiment differs from the previous embodiment mainly in the above-mentioned portions, the overall operation is almost the same as that of the previous embodiment, so a detailed explanation will be omitted.

In the embodiment described in detail above, the plurality of output parts of the drive device 128 are integrally formed as one elongated plate 130, but the plurality of output parts may be configured to operate integrally. Therefore, they do not necessarily have to be literally formed into one piece. It goes without saying that the drive device, relay member, transmission mechanism, etc. are not limited to those of the above embodiments, and the actuator may also be an air cylinder or the like instead of a solenoid without departing from the spirit of the present invention. It goes without saying that various modifications can be made within this range. As is clear from the above description, the present invention uses a drive device with a simple structure in which the output part operates integrally, and rotates only a selected sprocket by a predetermined angle from among a plurality of sprockets.
As a result, it is possible to arbitrarily feed a plurality of tapes set in parallel one by one or a plurality of tapes at the same time by a fixed length, which is an excellent effect. Moreover, the selection operation of rotating only a selected sprocket among a plurality of sprockets only moves the relay members provided corresponding to each sprocket between a position where driving force is transmitted and a position where driving force is not transmitted. This is done extremely quickly and allows shortening of cycle time.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a main part of an electronic component supply device including a tape feeding device according to an embodiment of the present invention in cross section, and FIG. 2 is an upper half of the drive device shown in FIG. FIG. FIG. 3 is a plan view of the tape fed by the apparatus shown in FIGS. 1 and 2, and FIG. 4 is a cross-sectional view taken in FIG. 3. FIG. 5 is an enlarged view of the main part in FIG. 1, and FIG. 6 is a cross-sectional view taken in FIG. FIG. 7 is a perspective view of FIG. 2. FIG. 8 is a front view of an electronic component supplying device including a tape feeding device according to another embodiment of the present invention, with main parts cut away. 1: Tape, 2: Cartridge, 4
: Sprocket, 18: Main body frame, 72: Rotating shaft (
transmission mechanism), 74: gear (transmission mechanism), 82: arm (
transmission mechanism), 84: feed pawl (transmission mechanism), 90: reversal prevention member (transmission mechanism), 92: locking pawl (transmission mechanism), 10
0: Rod (transmission mechanism), 104: Link (transmission mechanism)
, 118: Rod (transmission mechanism), 122: Solenoid (
Actuator), 124: Moving member (actuator), 126: Relay pin (relay member), 130: Plate (output part) (1 drive device), 136: Rotating plate (drive device), 138: Connecting rod ( Drive device), 144: Lever (drive device), 158
: Drive shaft (drive device), 160162: Cam (drive device), 222: Locking member, 224: Guide member, 232: Guide plate, 234: Bracket.

Claims (1)

[Claims] 1. In order to independently feed a plurality of tapes holding a large number of electronic components at equal intervals along the longitudinal direction, claws are provided that engage with engagement holes drilled at equal intervals in the tapes. In preparation for the outer surface,
A drive device comprising a plurality of sprockets arranged in parallel and a plurality of output parts corresponding to the plurality of sprockets, and configured such that the plurality of output parts operate integrally; a plurality of transmission mechanisms that independently transmit driving force to the plurality of sprockets to rotate them by a constant angle; a plurality of relay members that are selectively moved by an actuator to a first position where the driving force of the output section is relayed to the transmission mechanism and a second position where the driving force is not relayed to the transmission mechanism; Based on operation commands synchronously given to each of the actuators, only one selected from the plurality of sprockets receives the driving force of the drive device and rotates at a certain angle, so as to feed the tape a predetermined length. A tape feeding device characterized in that: 2. The transmission mechanism includes a gear provided concentrically and integrally with the sprocket, an arm rotatably provided around the axis of the gear, and pivotally connected to the arm, and the transmission mechanism is connected to the sprocket by a spring. It is biased in the direction of engagement with the gear, and when the arm rotates in the forward direction, the gear rotates together with the arm, and when it rotates in the opposite direction, it passes over at least one tooth of the gear. a feed pawl that engages with another tooth; a reversal prevention member that is attached to a stationary member and engaged with the gear so as to allow forward rotation but not reverse rotation; and a mechanism for transmitting the driving force of the output section to the arm through the rod and rotating the arm. The tape feeding device according to item 1. 3. The actuator includes a moving member that moves in a direction substantially perpendicular to the moving direction of the rod, and the relay member is a relay pin held movably in the same direction as the rod by the moving member. Claim 2, wherein the relay pin is configured to be pushed and moved by the output section of the drive device to move the rod in the longitudinal direction when the relay pin is in the first position. Tape feeder. 4. The transmission mechanism includes a gear provided concentrically and integrally with the sprocket, an arm rotatable around the axis of the gear, and pivotally connected to the arm and constantly engaged with the gear by a spring. When the arm rotates in the forward direction, the gear rotates together with the arm, and when the arm rotates in the opposite direction, it passes over at least one tooth of the gear and passes through another tooth. a feed dog that is movably attached to a stationary member and biased by a spring to fit between two adjacent teeth of the gear, and the arm rotates the gear; a locking member that is disengaged from the gear by the arm or a member operating in synchronization with the arm during at least the initial stage of the rotational movement for the drive; a mechanism for rotating the arm by a driving force, and after the tape has been fed a predetermined length, the locking member fits between the teeth of the gear to accurately rotate the sprocket. The tape feeding device according to claim 1, which is configured to position the tape in a rotational phase.