CN101959398B

CN101959398B - Belt-type feeder

Info

Publication number: CN101959398B
Application number: CN201010227682.1A
Authority: CN
Inventors: 谷口史之
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2009-07-15
Filing date: 2010-07-14
Publication date: 2015-01-21
Anticipated expiration: 2030-07-14
Also published as: JP2011023512A; JP5401190B2; CN101959398A

Abstract

The invention provides a belt-type feeder which alleviates impact between ratchet teeth and a retaining pawl which rotate along the interval of chain wheels, and prevents tripping out of an electrical component. In the belt-type feeder, the retaining pawl is provided with a blocking surface formed by two planes crossed at a front end direction by a blocking part at the front end; and ratchet teeth form teeth surfaces at interval on a circumferential end surface of the ratchet; the teeth surfaces have two planes which are crossed on a central direction of a shaft of the front end; the angle of the blocking surface of the blocking part is larger than the angle of the teeth surface; and the blocking part is formed that: when blocking with the ratchet teeth at maximum, the distance from a vertex position crossed on the blocking surface to a reference position formed by connecting two intersecting points between the teeth surface and the circumferential end surface of the ratchet is 1/2 longer than the distance from the reference position to the vertex position crossed with the teeth surface.

Description

Belt-type feeder

Technical field

The present invention relates to a kind of belt-type feeder, it utilizes same dog end, the sprocket wheel inserting pin in the inlet ports be equally spaced arranged on material containing band is rotated, makes this material containing band intermittently feeding, while supplied to assigned position by accommodated electronic unit.

Background technology

In order to install (lift-launch) electronic unit to by the substrate of locating, usually use erecting device (apparatus for mounting component).

In this erecting device, in order to install various electronic unit, the multiple belt-type feeders storing different electronic units are respectively installed, respectively to assigned position supply electronic unit.

Such as shown in Figure 1, belt-type feeder 10 is provided with: the parts supply unit 12 being in assigned position, and it is formed in leading section; Spool 14, it is arranged on rearward end, and reel material containing band T in advance; And sprocket wheel 16, it is configured in leading section, by making sprocket wheel 16 rotary actuation, can carry out index(ing) feed to above-mentioned material containing band T, supplies the electronic unit be housed in the accommodation bag (recess) of this material containing band T.

Material containing band T equally spaced forms inlet ports (not shown) along its length, in addition, as shown in Figure 3, equally spaced forms recess Ta along its length, in recess Ta, configures electronic unit P singly.In addition, material containing band T is provided with covering band Tb, and with coated recess Ta, this covering band Tb, before being delivered to above-mentioned parts supply unit 12, is stripped from material containing band T.

This belt-type feeder 10 as shown in Figure 2, if from the active force P of erecting device side, applies to the leading section knocking bar 18 upward, then this knocks bar 18 swing rotary along clockwise direction centered by swinging axle 20.Thus, with the 1st connecting rod 22 knocking bar 18 and link, swing rotary in the counterclockwise direction centered by the axle 22a of cardinal extremity, and the 2nd connecting rod 24 linked with the 1st connecting rod 22, swing rotary in the counterclockwise direction centered by rotating shaft 26.Thus, be fixed on the ratchet pawl 28 on the 2nd connecting rod 24 and engage with the hook tooth (groove) 32 of ratchet 30, this ratchet 30 is rotated in the counterclockwise direction at a certain angle.

Sprocket wheel 16 and this ratchet 30 support on the same axis, because sprocket wheel 16 is when utilizing active force P to be driven upward by the above-mentioned leading section knocking bar 18, its rear end side oscillation is to the stop position abutted with retainer 34, so via this ratchet 30, the rotational action that sprocket wheel 16 rotates along clockwise direction at a certain angle.

In above-mentioned inlet ports on above-mentioned material containing band, the periphery being embedded in sprocket wheel 16 with the identical solid pin 16A configured at equal intervals, when sprocket wheel 16 carries out to above-mentioned anticlockwise rotational action, by material containing band to direction of feed with a certain amount of feeding.

Therefore, by repeatedly carrying out the swing of knocking bar 18, material containing band T constantly carries out index(ing) feed with a certain amount of, is supplied successively by the electronic unit P be housed in the recess Ta of this material containing band T to parts supply unit 12.

Due to when these parts supply, need this recess Ta to locate exactly on parts supply unit 12, so be provided with lock pawl 36, it is when carrying out index(ing) feed (rotational action) to sprocket wheel 16 at every turn, prevent the counter-rotating of hook tooth 32, and hook tooth 32 is positioned.

In addition, as shown in Figures 4 and 5, lock pawl 36 utilizes not shown spring to the counter clockwise direction pretension of Fig. 4, and the holding section 36A of its front end engages with the outer peripheral face of ratchet 30.In addition, when engaging in the groove of the holding section 36A of lock pawl 36 with the hook tooth 32 of ratchet 30, prevent the reversion of sprocket wheel 16, and position.

In belt-type feeder 10 as noted above, there is following problems, namely, because material containing band T is to parts supply unit (absorption position) 12 intermittent movement, so can apply when stopping or moving to vibrate (impact), make parts P fly out from recess Ta, protrude, or positive and negative is reversed, the adsorption mouth of erecting device cannot be utilized thus to adsorb.

Therefore, in order to not apply to impact when above-mentioned ratchet pawl and lock pawl carry out action, spring force adjustment is utilized.Such as shown in record in patent documentation 1, adopt following method, that is, by utilizing spring by direction (direction that with the hook tooth engage) pretension of ratchet pawl to ratchet, thus, the impact produced when ratchet pawl engages with hook tooth is relaxed when each feed motion.

Patent documentation 1: Japanese Unexamined Patent Publication 8-236986 publication

Summary of the invention

But above-mentioned spring can not eliminate impact sometimes.

Such as in the prior art, as shown in Fig. 6 (A), the angle of 1 hook tooth, 32 openings of ratchet 30, namely, 2 plane angulations that axle center position intersects are (following, be called flank of tooth angle) be 75 °, on the other hand, as shown in Fig. 6 (B), the angle of the holding section 36A of lock pawl 36, that is, formed by 2 planes front extreme direction intersected, toe angle (hereinafter referred to as snap-latch surface angle) is formed as little in contrast 72 °.

Therefore, as shown in Figure 5, if sprocket wheel 16 rotates, then lock pawl 36 is shown in dotted line, is temporarily raised up on the circumferential end surfaces 30A of ratchet 30, then with the state shown in solid line, again engages with next hook tooth 32.

As noted above, due to basis

The relation of hook tooth flank of tooth angle > lock pawl snap-latch surface angle, when carrying out making the holding section 36A of lock pawl 36 to cross the intermittent rotary of the circumferential end surfaces 30A of ratchet 30, the smooth flank of tooth of hook tooth 32 can be intimate contact with one another with the tabular surface of the holding section 36A of lock pawl 36, so each intermittent rotary can cause acute impact.Therefore, sometimes due to produced vibration, parts are flown out from the recess of material containing band, protrudes or positive and negative reversion in accommodation bag.

This point is also identical when the engaging of ratchet pawl with hook tooth.

Problem of the present invention is, provides a kind of belt-type feeder, and it, by relaxing hook tooth and lock pawl along with the intermittent rotary of ratchet to the impact of hook tooth, even if to minimum electronic unit, also can supply to parts supply unit with normal attitude stabilization.

The present invention is a kind of belt-type feeder, and it has: swingable knocks bar, ratchet, itself and the described bar that knocks link, and are rotatably supported, arrange multiple hook tooths of channel-shaped on the outer periphery, sprocket wheel, itself and described coaxial ratchet ground are supported, and are rotated every certain angle by the rotation of described ratchet, and tine, it has leading section, the holding section engaged with the peripheral part of described ratchet is set at described leading section, this holding section can engage with described hook tooth, described sprocket wheel is positioned on each turned position, by the rotation of described sprocket wheel, make the material containing band intermittently feeding of accommodating electronic unit at certain intervals, this electronic unit is supplied to parts supply unit, it is characterized in that, the described holding section of described tine, there is the snap-latch surface be made up of 2 planes intersected on front extreme direction, and, described hook tooth, the circumferential end surfaces of described ratchet is equally spaced formed, there is the flank of tooth be made up of in 2 planes that axle center position intersects front end, snap-latch surface angle formed by the described snap-latch surface of described holding section is formed larger than flank of tooth angle formed by the described flank of tooth.

In addition, the invention is characterized in, described tine is the lock pawl for being located by described ratchet, described holding section is formed as, when engaging with described hook tooth maximum, the vertex position intersected from described snap-latch surface to the distance of the reference position that the intersection point of 2 between the described flank of tooth and the circumferential end surfaces of ratchet is linked, and from longer compared with 1/2 of the distance of this reference position to the vertex position that this flank of tooth intersects.

The effect of invention

According to the present invention, because the holding section of the front end by lock pawl or ratchet pawl is set to, its snap-latch surface angle is large compared with the flank of tooth angle of hook tooth, so holding section can be utilized reliably to prevent the reversion of hook tooth and position, due on this basis, when falling to hook tooth (groove) in this holding section, a side of holding section is while contact with the vertex point of hook tooth while slide, so when each intermittent rotary, impact when mitigation lock pawl or ratchet pawl engage, can make the attitude stabilization of the electronic unit on parts supply unit.

And the degree of depth due to the holding section by lock pawl is set to compared with 1/2 of the degree of depth of hook tooth darker, so can reliably position.

Accompanying drawing explanation

Fig. 1 is the end view of the summary representing belt-type feeder entirety.

Fig. 2 is the partial side elevation view representing that the feed mechanism had by existing belt-type feeder amplifies.

Fig. 3 represents the fragmentary cross-sectional view amplified by material containing band.

Fig. 4 is the end view of the relation representing existing sprocket wheel ratchet stop pawl.

Fig. 5 represents the key diagram ratchet of the A scope of Fig. 4 and lock pawl amplified.

Fig. 6 is the key diagram of the feature representing the angle of existing hook tooth and the angle of lock pawl front end.

Fig. 7 represents to extract and the end view of sprocket wheel, ratchet and lock pawl that has of the belt-type feeder amplifying an execution mode involved in the present invention.

Fig. 8 represents the partial side elevation view feature of the relation of hook tooth and holding section amplified.

Fig. 9 is the key diagram of the feature of the angle of the hook tooth representing present embodiment and the angle of lock pawl front end.

Figure 10 represents that the feeding of sprocket wheel starts, the key diagram of the lock pawl action of feeding midway.

Figure 11 be represent the feeding of sprocket wheel just terminate before the key diagram of lock pawl action.

Figure 12 is the key diagram of the lock pawl action that the feeding of sprocket wheel terminates.

Figure 13 is the line chart of the effect representing present embodiment.

Embodiment

Below, with reference to accompanying drawing, describe embodiments of the present invention in detail.

The belt-type feeder 10 of present embodiment is identical with the device basic structure shown in above-mentioned Fig. 1, Fig. 2.Therefore, for identical part, omit detailed description.

In Fig. 7, Fig. 8, as the above-mentioned lock pawl 36 of tine, the holding section 40 of front end has the snap-latch surface 43 be made up of 2 planes 41,42 intersected on front extreme direction, and, the hook tooth 32 of channel-shaped is equally spaced formed on the circumferential end surfaces 30A of above-mentioned ratchet 30, has the flank of tooth 53 that 2 planes 51,52 of being intersected on axle center position by front end are formed.

The holding section 40 of hook tooth 32 and lock pawl 36 front end, shown in Fig. 9 (A), (B), formed by above-mentioned snap-latch surface 43, snap-latch surface angle [alpha] is formed as obtuse angle, formed by the above-mentioned flank of tooth 53, flank of tooth angle beta is formed as acute angle, snap-latch surface angle [alpha] > flank of tooth angle beta.

As concrete example, the flank of tooth angle beta of hook tooth 32 is 70 °, and the snap-latch surface angle [alpha] of the engagement tip 40 of lock pawl 36 is 108 °.But, as concrete angle [alpha], β, be certainly not limited to this.

According to from the feeding till maximum engaging is in time engaging with next tooth is maximum, feeding midway, each process status of terminating of feeding, the effect of present embodiment is described.

First, when the feeding shown in Figure 10 starts, the holding section 40 of lock pawl 36 maximally engages with the inside of hook tooth 32, is in the state of dotted line (Figure 10 (B)).If make ratchet 30 counterclockwise rotate to Figure 10 (A) from this state, then lock pawl 36 crosses the summit 32A of hook tooth 32, become the state of the feeding midway shown in straight line (Figure 10 (B)), the front end of lock pawl 36 in the upper slip of outer peripheral face (circumferential end surfaces) 30A of this ratchet 30 while movement.

As shown in figure 11, if the front end of the lock pawl 36 slided on outer peripheral face 30A, by summit (bight) 32b of next hook tooth 32N, then front end falls to hook tooth 32N.Now, a side 36c of the sprocket wheel direction of rotation side of this lock pawl 36, slides relative to above-mentioned summit 32b point cantact, while fall to the lowest point (Figure 11 (B) arrow mark).

Then, as shown in figure 12, side 36c slides relative to summit 32b while the lock pawl 36 that falls, engages (Figure 12 (B)), again stop with maximum fastening state with hook tooth 32N with wedge-like.

As noted above, according to the present embodiment, during owing to engaging with hook tooth 32 at lock pawl 36, departing from, a side of lock pawl 36 and the vertex point of hook tooth 32 slide contiguously, so can not apply to impact to ratchet 30, also can not apply to impact to the sprocket wheel 16 supported on the same axis with ratchet 30.

In Figure 13 (A), (B), show for shown prior art and present embodiments such as above-mentioned Fig. 4 contrastively, the result of the vibrational waveform of the impact that actual measurement produces when being equivalent to the engaging of lock pawl 36, known: in the present embodiment, impact and relax significantly.

In addition, the holding section 40 of above-mentioned lock pawl 36 is formed as, when engaging with above-mentioned hook tooth 32 maximum shown in Fig. 8, from the vertex position 44 that above-mentioned snap-latch surface 43 intersects, be h to the distance of reference position 54 that 2 intersection points between the above-mentioned flank of tooth 53 and the circumferential end surfaces 30A of ratchet are linked, this distance h with from darker compared with 1/2 of the depth H of this reference position 54 to the vertex position 55 that this flank of tooth 53 intersects.

If make both for the relation of this degree of depth, then can guarantee that holding section 40 reliably engages with wedge-like relative to hook tooth 32, and the larger power of effect, so can as the reversion preventing ratchet 30 (sprocket wheel 16), and the retainer of locating exactly works.

Therefore, according to the present embodiment, can play fully on the basis of retainer function at lock pawl 36, the impact when hook tooth 32 of minimizing ratchet 30 engages, prevent in feeding midway, minimum parts are jumped out or are reversed in accommodation bag from the accommodation bag cutting out material strip T, make the attitude stabilization of the electronic unit on parts supply unit.

In addition, in the present embodiment, describe lock pawl as tine, but as tine, also may be embodied as ratchet pawl.

Claims

1. a belt-type feeder, it has:

Swingable knocks bar;

Ratchet, itself and the described bar that knocks link, and are rotatably supported, arrange multiple hook tooths of channel-shaped on the outer periphery;

Sprocket wheel, itself and described coaxial ratchet ground are supported, and are rotated every certain angle by the rotation of described ratchet; And

Tine, it has leading section, and arrange the holding section engaged with the peripheral part of described ratchet at described leading section, this holding section can engage with described hook tooth, is positioned at by described sprocket wheel on each turned position,

By the rotation of described sprocket wheel, make the material containing band intermittently feeding of accommodating electronic unit at certain intervals, by this electronic unit to the supply of parts supply unit,

It is characterized in that,

The described holding section of described tine, has the snap-latch surface be made up of 2 planes intersected on front extreme direction, and,

Described hook tooth, the circumferential end surfaces of described ratchet is equally spaced formed, and has the flank of tooth be made up of in 2 planes that axle center position intersects front end,

Snap-latch surface angle formed by the described snap-latch surface of described holding section is formed larger than flank of tooth angle formed by the described flank of tooth.

2. belt-type feeder according to claim 1, is characterized in that,

Described tine is the lock pawl for being located by described ratchet.

3. belt-type feeder according to claim 2, is characterized in that,

Described holding section is formed as, when engaging with described hook tooth maximum, the vertex position intersected from described snap-latch surface to the distance of the reference position that the intersection point of 2 between the described flank of tooth and the circumferential end surfaces of ratchet is linked, and from longer compared with 1/2 of the distance of this reference position to the vertex position that this flank of tooth intersects.