JPH07300221A - Screw feeding device - Google Patents

Abstract

PURPOSE:To feed a sufficient number of unstable screws by conveying and dropping the screws to the prescribed position in the random state with the first conveying means, receiving the screws at the upper end section with a pair of rollers adjacently arranged in the inclined attitude and rotatively driven as the second conveying means, and providing a brush member below the receiving portion. CONSTITUTION:This screw feeding device is constituted of the first conveying means 2 conveying and dropping screws 1 to the prescribed position in the random state and a pair of rollers 3, 4 adjacently arranged in the inclined attitude and rotatively driven. The screws l dropped at the upper end section of a pair of rollers 3, 4 are received, leg sections 1a of the rivet screws 1 are received and aligned between the rollers 3, 4. The second conveying means 5 sliding, shifting, and feeding the screws l to the lower end side and a brush member 6 in the downstream portion of the portions of the rollers 3, 4 receiving the screws l are provided around the axis nearly parallel with the axes of the rollers 3, 4. The discharging characteristic corresponding to the type of the 4 screws 1 is obtained, and a sufficient number of unstable screws 1 can be fed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to screws, tacks, or
The present invention relates to a tack screw supply device for transferring and supplying pins having a foot portion similar to these and a head portion having a diameter larger than this, in a state of being aligned from a random state and supplying.

[0002]

2. Description of the Related Art A conventional device for aligning and feeding screws has a scooping plate which moves in an arc and moves up and down in a hopper, and each time the scooping plate moves upward, the scooping plate has a narrow upper surface. When a random screw in the hopper is scooped up while receiving the foot portion of the screw in the groove formed in the groove, as the scooping plate tilts while moving upward, the shooter inclining the screw that received the foot portion There is a scooping system that slides it into the door and feeds it to the destination.

Further, along the inner circumference of the vibrating hopper, random screws in the hopper are aligned in a specific direction and sent out.
There is also a vibration system in which the fed-out screw is received in a straight-line feeder, aligned and transferred to the beginning.

However, in the scooping method, since the groove for receiving the foot is a fixed part formed on the upper surface with a narrow width, the guiding action for the foot of the screw to enter into this is weak, so the probability of the foot entering Is low and supply is low. In addition, since the groove of the shooter is also a fixed part, the heads of the screws that slide down toward the lower end of the shooter are overlapped and entangled,
Alternatively, they sometimes clog each other to cause clogging, and it is sometimes impossible to feed the screw first. The entanglement due to the overlapping of the heads is particularly large in the case of a countersunk screw, and the bite of the head is particularly large in the case of a so-called double-sems screw in which two washers are fitted to the neck.

Further, the vibration type has a complicated structure and is expensive, and since it is necessary to prevent the influence of other vibrations and low-frequency noise due to the vibration, the equipment cost is high.

On the other hand, Japanese Patent Laid-Open No. 1-156221 discloses that
A screw supply device that does not have these problems is disclosed.

[0007] This one receives a screw which is conveyed in a random state and is dropped at a predetermined position at the upper end of a pair of rollers arranged adjacent to each other in an inclined state, and the foot portion of the screw to be received is received. Align by receiving between the rollers, remove the screws whose feet cannot be received between the rollers with a brush that moves back and forth in the direction parallel to the axis of the rollers, and slide only the screws that received the feet to the lower end side. To line up,
It is designed to be supplied first. Further, each of the rollers is rotationally driven in a direction in which a transfer force can be obtained in which the foot portion of the received screw is directed between the rollers.

Thus, the rounded surface of the roller can guide the foot of the screw so that it slides between the rollers even from a position far away from the closest point of each roller, and the rotation of the roller causes the foot of the screw to move. Since the transfer force to the side of entering between the rollers can be given, the probability that the foot portion of the screw is received between the rollers is high, and the number of supplied screws can be increased. Moreover, the device is simple and inexpensive,
There is no problem of vibration and noise caused by this.

[0009]

However, there are various types of screws, such as flat screws and double sems screws, as described above, and it is easy for each of the feet to enter between the rollers, and the feet enter between the rollers. Stability in different states is different. In particular, with a screw with a large head such as a double-sems screw, even if the foot is long and easily enters between the rollers, it is unstable because the bulkiness of the head between the rollers is large, and Even when the parts are inserted between the rollers, they are easily caught by the brush that removes the misaligned screw and pulled out. Moreover, when the misaligned screw is removed on the upper end side of the roller pair by the brush that reciprocates in the direction parallel to the axis of the roller, the foot portion is received between the rollers at a position upstream of the screw. Even with the aligning screw, it is sometimes pushed backward and pushed out from the upper end of the roller pair. For this reason, there is a problem that the number of supplied screws is small in spite of the high probability that the foot portion of the screw is received between the rollers.

An object of the present invention is to solve such a problem, and there is no inconvenience that the aligned stud screw is eliminated by the synergistic action of a new combination of the roller pair and the brush for eliminating the unaligned stud screw. Moreover, it is a main object to provide a stud screw supply device which can obtain an exclusion characteristic according to the type of stud screw and can obtain a sufficient supply number even with an unstable stud screw.

[0011]

In order to achieve the above-mentioned object, the stud screw feeding device of the present invention is inclined with first conveying means for conveying and dropping the stud screws to a predetermined position in a random state. It consists of a pair of rollers that are arranged adjacent to each other and are driven to rotate.The upper ends of the pair of rollers receive the dropped studs, and the feet of the studs are received between the rollers to align them. And a brush which is provided on a portion of the roller pair on the downstream side of the portion for receiving the rivet screw and is driven to rotate about an axis substantially parallel to the axis of the roller pair. The main feature is to have a member.

It is preferable that the brush member has a taper shape on the tip end side facing the upper end side of the roller pair, and it is also preferable that the tip ends of the bristles are arranged in a spiral shape.

A screw thread is formed on the outer peripheral surface of the lower end portion of one roller of the roller pair, and the stud screws transferred in an aligned state between the rollers are received one by one between the screw threads and conveyed to the front. It is preferable to be able to send out, and the rollers having at least the thread forming part of the roller pair are separated into the thread forming part and the upstream side, and are independently driven to rotate. Is more preferable.

[0014]

In the configuration of the above-mentioned main features of the tack screw supply device of the present invention, the first conveying means conveys and drops the tack screws in a random state to a predetermined position, whereas the second conveying means is inclined. The pair of rollers which are arranged adjacent to each other in such a posture and are driven to rotate receive the dropped rivets at the upper end thereof. At this time, the roller pair uses the roundness of the roller surface and the transfer force by rotation to accept the foot portion of the stud screw between the rollers with high probability, thereby aligning a large number of stud screws per unit length and Due to the inclination, the vibration due to the rotation and the like can be slid smoothly toward the lower end side of the roller pair. At the same time, the brush member is located downstream of the portion of the roller pair that receives the falling rivet screw and is driven to rotate about an axis that is substantially parallel to the axis of the rollers, so that the legs do not enter between the rollers. Since the misaligned studs that are placed between the rollers are ejected to the side of the roller pair and eliminated, the rollers do not have to be pushed backwards without pushing out the above-mentioned many aligned studs that have feet inserted between the rollers. The lower end of the pair can be smoothly reached and supplied.

In particular, the fact that the surface of each rotating roller exerts a transfer force on the stud screw in the rotational direction is used to rotate one of the rollers in a direction in which the stud screw gives a transfer force to the side where the stud screw enters between the rollers. Then, the other roller is rotated in the direction in which the tack screw gives a transfer force to the side where the tack screw comes out from between the rollers, and it is said that the peripheral speeds of both are made different. By appropriately setting the transfer force that works to enter and the transfer force opposite to this, while obtaining the optimum foot receiving characteristics for the type of tack screw and ensuring the maximum alignment probability,
Even with a stud screw whose head is easily caught, it is possible to avoid the inconvenience that this bites between the rollers, and in addition, depending on the rotating direction of the brush member at the facing portion between the brush member and each roller. The moving direction of the surrounding surface is
By setting the stud screw in a direction opposite to the moving direction of the peripheral surface of the roller having a transfer force to the side of entering between the rollers, the removing force against the misaligned stud screw of the brush member is changed to the rotation of the roller. With the accompanying transfer force, it is possible to prevent the alignment studs and studs in a state close to this from being eliminated when the stud is an unstable stud like a double sems screw. By aligning the rivet screw with the moving direction of the peripheral surface of the roller that has the transfer force to the side where the stud screw comes out from between the rollers, the misaligned stud screw can be removed in the removal direction by the brush member and the roller. By working together and eliminating, even the stable stud screw in the unaligned state on the roller pair is surely removed and the unaligned stud screw is mixed with the aligned stud screw and supplied, and the unaligned stud screw is also provided. Obstructs downstream flow of aligned rivets It that can cause clogging Te can be prevented.

In the configuration in which the brush member has a taper shape on the tip end side facing the upper end side of the roller pair, the gap between the taper-shaped portion of the brush member and the roller pair is large on the upstream side of the roller pair and downstream. By becoming smaller towards the side,
When the tack screw received at the upper end of the roller pair flows downstream, the taper-shaped portion of the tip of the brush member gradually works. While preventing the brush members from working strongly while the feet are not received between the rollers by the studs, it is possible to prevent the brush members from being eliminated, while the upstream side and the downstream side can be greatly reduced between the tapered portion and the roller pair. A space having a substantially triangular cross-section that can be made smaller toward the side serves to guide the stud screws received by the roller pair so as to gather in the inter-roller part, so that the foot part of the stud screw is Since it is easily accepted by the device, the alignment efficiency can be further improved.

Further, in the construction in which the brush member is formed such that the tips of the bristles are arranged in a spiral shape, when the brush member is rotated, the tips of the bristles arranged in the spiral are received on the roller pair and are downstream. Since the transfer force to the upstream side or the downstream side is applied depending on the rotating direction of the brush member in contact with the rivets that flow to the side, the direction of this transfer force can be selected to eliminate the misalignment. It is possible to increase the rejection rate of misaligned studs by suppressing the progress of the studs that are difficult to move to the downstream side. Can be accelerated to prevent the alignment stud screw from being removed.

A screw thread is formed on the outer peripheral surface of the lower end portion of one roller of the roller pair, and the stud screws transferred in an aligned state between the rollers are received one by one between the screw threads and conveyed to the front. In the configuration in which the legs can be sent out, the stud screws that flow to the lower end side of the roller pair while the feet are received between the rollers and aligned and pushed by the subsequent stud screws are the screw thread forming portion of the lower end part of the rollers. When the rollers are sequentially reached, one by one is taken in between the spiral threads in order from the first one in accordance with the rotation of the roller, and one by one can be separated and fed forward.

Further, in the structure in which the rollers having at least the screw thread forming portion of the roller pair are separated into the screw thread forming portion and the upstream side and are driven to rotate independently of each other, the screw thread forming portion is The upstream part is stopped while avoiding the confusion that the stud screw is clogged on the supplied side by stopping it when consumption of the stud screw is stopped and causing unnecessary supply or excessive supply. Continue the rotation to replenish the aligned studs, or intermittently rotate the studs 1
When supplying one by one intermittently, or when the number of aligning studs on the upstream side reaches a sufficient amount, stop the upstream side and useless aligning operation or excessive aligning studs. Therefore, it is possible to prevent the downstream side from being adversely affected. Further, it is possible to rotate the screw thread forming portion faster than the upstream side portion to avoid clogging of the tack screw upstream of the screw thread forming portion.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rivet screw feeding device of the present invention will be specifically described below with reference to several embodiments.

1 to 10 show an embodiment of a tack screw feeding device of the present invention. Although only the supply of screws will be dealt with in the following description, it is needless to say that the present invention can be similarly applied to the supply of studs and various pins having a foot and a head similar to these.

As shown in FIGS. 1 and 3, the rivet screw feeder of this embodiment is adjacent to the first conveying means 2 for conveying the screw 1 to a predetermined position in a random state and dropping it, in an inclined posture. It is composed of a pair of rollers 3 and 4 that are arranged and driven to rotate. The upper end of the pair of rollers 3 and 4 receives the dropped screw 1 and the foot portion 1a of the screw 1 is shown between the rollers 3 and 4 in FIG. The second conveying means 5 which is aligned by receiving the same and is slid to the lower end side to be transferred and supplied.
And a brush member 6 provided on the downstream side of the portion for receiving the screw 1 of the roller pair 3 and 4 and driven to rotate about an axis substantially parallel to the axis of the roller pair 3 and 4.

According to this, the first conveying means 2 has the screw 1
The rollers 3 and 4 which are adjacently arranged and driven to rotate in a slanted posture forming the second conveying means 5 are conveyed to a predetermined position in a random state and dropped, and the screw which is dropped at the upper end portion. 1 as shown in FIG. At this time, the roller pairs 3 and 4 receive the foot portion 1a of the screw 1 between the rollers 3 and 4 with a high probability by using the roundness of the surfaces of the rollers 3 and 4 and the transfer force due to the rotation, so that the unit length is increased. It is possible to align a large number of screws 1 to be hit and to smoothly slide the rollers 1 to the lower ends of the roller pairs 3 and 4 as shown in FIG. At the same time, the brush member 6 moves the roller pair 3, 4
The roller pair 3 is located downstream of the portion that receives the falling screw 1 and is driven to rotate about an axis parallel to the axes of the rollers 3 and 4, and the foot portion 1a does not enter between the rollers 3 and 4, Since the screw 1 mounted on the roller 4 is rejected by splashing it to the side of the roller pair 3 and 4, it does not push out the above-mentioned many aligning screws having the foot portion between the rollers 3 and 4 rearward. The lower ends of the roller pairs 3 and 4 can be smoothly reached and supplied. Therefore, the number of screws 1 supplied increases.

In this embodiment, the first transport means 2
Is a scooping drum 11 that is driven to rotate about a horizontal axis as shown in FIG. 1, and the screw 1 is randomly housed as shown in FIGS. The side opening 11a of the raking drum 11 is rotatably butted against a semi-circular opening 12a formed on the side of the hopper 12 so as to be in a connected state.
The random screw 1 accommodated therein constantly flows into the scraping drum 11 by its own weight, and the screw 1 is scraped up by the scraping drum 1
A scraping plate 11b integrally formed on the inner circumference of the scooping member 1 scoops up and drops it upward. Thereby, the screw 1 can be dropped at a predetermined position in a substantially predetermined cycle. This falling cycle can be variously set depending on the rotation speed of the scraping drum 11 and the number of the scraping plates 11b, and the amount of the screw 1 falling at one time is the scraping plate 1.
Various settings can be made according to the size and shape of 1b. The scraping drum 11 has such a size and shape as shown in the drawing that a sufficient amount of the screw 1 can be dropped, and the scraping drum 11 rotates along one side of the roller pair 3 and 4 and is also misaligned with the rollers. Screw 1 dropped from pair 3 and 4 and falling
Can be made compact with the hopper 12 having a size and a position for surely receiving. The screw 1 dropped by the scraping drum 11 located on one side of the roller pair 3 and 4 is guided by the shooter 20 so as to surely drop onto the upper ends of the roller pairs 3 and 4.

Of course, the first conveying means 2 may be other known conveying means such as a belt conveyer or a bucket conveyer, and the shooter 20 may be used as necessary. In the case of being driven to rotate around the roller pairs 3 and 4 as disclosed in the above-mentioned publication, or in the case of a belt conveyor or the like, the screw 1 is conveyed onto the roller pairs 3 and 4 and dropped directly. The intermediate transfer means such as the shooter 20 can be omitted. In case of belt conveyor, screw 1
Has a feature that it can be continuously dropped to a predetermined position while being continuously conveyed.

In particular, when the screws 1 are aligned and supplied by the roller pairs 3 and 4, the fact that the surface of each of the rotating rollers 3 and 4 exerts a transfer force on the screw 1 in the rotation direction is utilized.
4, one of the rollers 4, for example, is rotated in the direction in which the screw 1 gives a transfer force to the side where the screw 1 enters between the rollers 3 and 4, and the other roller 3 is screwed as shown in (b) and (c) of FIG. 1 is rotated in a direction that gives a transfer force to the side where the rollers 3 and 4 come out from between the rollers 3 and 4, and the peripheral speeds v1 and v2 of the rollers 1 and 2 are different from each other. The transfer force acting so as to enter between 4 and the transfer force opposite thereto are appropriately set, and the normal screw 1 shown in FIG. 1A or the screw shown in FIG. Such a double-sems screw 1, such as the head 1 while securing the maximum alignment probability by obtaining the receiving characteristic of the foot 1a that is optimum for the type of screw
Even in the case of the screw 1 of the type in which b is easily caught, it is possible to avoid the inconvenience that the screw 1 is caught between the rollers 3 and 4, and in addition, in the facing portion between the brush member 6 and each of the rollers 3 and 4, rotation is possible. As shown in FIG. 3 (b), the screw 1 moves to the roller 3,
By setting so as to be opposite to the moving direction of the peripheral surface of the roller 4 having a transfer force to the side between the rollers 4, the removing force of the brush member 6 against the misaligned screw 1 is accompanied by the rotation of the roller 4. In the case of an unstable screw 1 such as the double-sems screw 1 by suppressing the transfer force to some extent, it is possible to prevent the alignment screw 1 and the screw 1 in a state close to this from being eliminated, and the alignment probability Can be increased. Further, as shown in FIG. 3C, the screw 1 is aligned with the moving direction of the circumferential surface of the roller 3 having a transfer force to the side where the screw 3 is pulled out from between the rollers 3 and 4, so that the misaligned screw 1 is brushed. By the member 6 and the roller 3 working together in the removing direction to remove, even the stable screw 1 in the non-aligned state on the roller pairs 3 and 4 is surely removed, and the misaligned screw 1 is supplied mixed with the aligned screw 1. It is possible to prevent such a situation that the misaligned screw 1 is blocked or the misaligned screw 1 interferes with the downstream flow of the aligned screw 1 to cause clogging.

According to an experiment conducted by the present inventor, v1: v
2 = 2 to 2.5: 1 is suitable, and conventionally, the supply amount of the double-sems screw 1 was about 10 / min, but in the present embodiment, it is about 20 to 30 / min, and the supply amount is several. Doubled. However, the present invention is not limited to the above speed relationship. It may be set variously according to various conditions. Further, the inclination angle θ of the rollers 3 and 4 is suitably about 5 ° to 8 °, but this can also be set variously according to various conditions.

Further, in the present embodiment, the brush member 6 has a tapered shape on the front end side facing the upper end side of the roller pairs 3 and 4, as shown in FIGS. 1, 3, and 4. As a result, the gap S between the tapered portion 6a of the brush member 6 and the roller pairs 3 and 4 shown in FIG. 4 is large on the upstream side of the roller pairs 3 and 4, and decreases toward the downstream side. When the screw 1 received by the upper ends of the roller pairs 3 and 4 flows downstream, the taper-shaped portion 6a at the tip of the brush member 6 gradually works, so that it is received by the roller pairs 3 and 4. Immediately after that, a large number of screws 1 still have the legs 1a on the rollers 3, 4
The brush member 6 works strongly while not being received in between, and prevents the brush members from being removed, while the brush member 6 is largely directed toward the downstream side on the upstream side between the tapered portion 6a and the roller pairs 3 and 4. The space A having a substantially triangular cross section, which can be made smaller, serves to guide the screw 1 received by the roller pairs 3 and 4 so as to gather between the rollers 3 and 4, so that the screw 1 Since the foot portion 1a is easily received between the rollers 3 and 4, the alignment efficiency can be further enhanced.

The brush member 6 is formed such that the tips of the bristles 6b are arranged in a spiral shape as shown in FIGS. 1, 3, and 4. Thereby, the brush member 6
When is rotated, the tips of the bristles 6b arranged in a spiral form
In contact with the screw 1 received on the roller pairs 3 and 4 and flowing to the downstream side, and depending on the direction of rotation of the brush member 6, the screw 1 or the downstream side, as shown by an arrow in FIG. Since a transfer force to the upstream side, which is the opposite of the above, is exerted, by selecting the direction of this transfer force, the type of screw 1 that is difficult to remove in the misaligned state is suppressed by the misaligned screw by suppressing the progress toward the downstream side. The screw 1 of the kind that is easily excluded even in the aligned state speeds up the progress to the downstream side.
It is possible to prevent the alignment screw 1 from being removed and prevent the supply number from decreasing.

The brush member 6 of this embodiment is obtained by twisting a brush 6b sandwiched between two wires 61 as shown in FIGS. 3 (a), 3 (b) and 4 (a). The wire 61 serves as the axis of rotation.

However, the present invention is not limited to this, and the hair may be flocked around the rotation axis. In this case, the arrangement of the tips of the bristles 6b and the density can be freely set.
When the tips of the spirals are arranged in a spiral, the misaligned screws 1 are simply captured and conveyed in the spiral groove 6c formed by the tips of the hairs 6b arranged in a spiral as shown in FIG. 4 (a). It is possible to prevent such a thing that it cannot be repelled.

In this embodiment, as shown in FIG. 2, one of the roller pairs 3 and 4, for example, a screw thread 22 is formed on the outer peripheral surface of the lower end of the roller 4, and the space between the rollers 3 and 4 is shown in FIG. As shown, the screws 1 transferred in the aligned state are attached to the respective screw threads 2
It is designed so that it can be received one by one between two and can be transported and sent out. As a result, the screw 1 flowing to the lower end side of the roller pair 3, 4 while the foot portion 1a is received between the rollers 3, 4 and aligned and pushed by the subsequent screw 1 is
When the screw forming portion 4a at the lower end of the roller 1 is sequentially reached, these screws 1 are sequentially moved from the previous one in accordance with the rotation of the roller 4, and as shown in FIG.
It can be taken in one by one, separated one by one, and sent out and supplied. At this time, if the pitch of the screw threads 22 is increased toward the lower end of the roller 4 and the intervals of the screws 1 that are sent out by dividing the screws one by one are gradually increased, the screws 1 are individually and individually. Supply is more reliably achieved.

Further, in this embodiment, the screw thread forming portion 4a is formed.
The roller 4 having the above is separated into a screw thread forming portion 4a and an upstream side portion 4b so that they can be rotationally driven separately from each other. As a result, the screw thread forming portion 4a becomes the screw 1
Of the upstream side portion 4 while avoiding the confusion that the screw 1 is clogged on the supplied side by stopping the consumption when the consumption is stopped and causing unnecessary supply or excessive supply.
b continues to rotate to replenish the alignment screw 1, supply intermittently to each screw 1 by intermittent rotation of the screw thread forming portion 4a, or align screw 1 in the upstream portion.
When it reaches a sufficient amount, the upstream side portion 4b can be stopped to prevent a wasteful aligning operation or an excessive aligning screw which adversely affects the downstream side. Because of such control, in the present embodiment, FIG.
As shown in, a sensor 24 for detecting the alignment screw 1 on the roller pairs 3 and 4 is provided at a position immediately downstream of the brush member 6,
When the sensor 24 continuously detects the screw 1 for a predetermined time or longer, it is determined that the alignment screw 1 is full, and control for preventing excessive alignment and supply can be performed.

In some cases, as shown in FIGS. 2, 5 and 6, an upper guide 25 for preventing the screw 1 from jumping upward is provided in a range extending a little upstream from the portion where the screw thread 22 is guided. It may be provided.

In addition to the above, in this embodiment, the roller 3 having no screw thread 22 is also separated into a downstream side portion 3a facing the screw thread forming portion 4a and an upstream side portion 3b facing the upstream side portion 4b. However, both are individually driven to rotate. Accordingly, the downstream side portion 3a and the upstream side portion 3b of the roller 3 are rotationally controlled in the same manner as the thread forming portion 4a and the upstream side portion 4b of the roller 4 corresponding thereto are rotationally controlled as described above. As a result, the screw alignment, supply, and alignment and supply stop can be more reliably achieved by the cooperation of the opposing roller portions.

In this case, the relationship between the peripheral speed v3 of the downstream side portion 3a and the peripheral speed v4 of the screw thread forming portion 4a is preferably set to about 2 to 2.5: 1 as in the case of v1 and v2. Is.

However, the present invention is not limited to this.

If v1 <v3, v2 <v4 and the peripheral speed of the downstream side portion is set to be higher than the peripheral speed of the upstream side portion, it is likely that the roller pair 3, 4 is supplied densely from the upstream side. It is easy to increase the flow velocity of the screw 1 on the downstream side and prevent the screw 1 from being blocked due to the influence of the subsequent screw 1.

FIG. 11A shows an embodiment in which the entire rollers 3, 4 are integrally formed, and FIG. 11B shows only the roller 4 divided into a screw thread forming portion 4a and an upstream portion 4b. In this embodiment, the entire roller 3 is integrally formed so that the roller 3 is driven. Further, in (c), the roller 4 is divided into three parts, that is, a screw thread forming portion 4a, an intermediate portion 4c, and an upstream side portion 4b so that they are individually driven. The roller 3 corresponds to each of these portions, and the downstream side portion 3a and the intermediate portion Part 3c, upstream part 3
An embodiment is shown in which it is divided into three parts of b and driven individually.

As shown in (a), if a screw drop gap 72 formed by the small diameter portions 3d and 4d is formed at the upstream end of the rollers 3 and 4, it is rare, but as shown by an imaginary line. When the misaligned screw 1 climbs up to the upstream end due to the rotation of the rollers 3 and 4 affecting its own screw thread, it is dropped from the gap 72 and the others are affected. Can be prevented.

In the embodiment shown in (c), the peripheral speed limits of the longitudinal portions of the rollers 3 and 4 are v1 <v5 <v.
Since it can be performed in three stages of 3, v2 <v6 <v4, the clogging prevention control of the screw 1 can be achieved more reasonably and reliably. In this case, the ratio of the peripheral speed v5: v6 is also preferably set to about 2 to 2.5: 1 as described above.

Returning to the previous embodiment shown in FIGS. 1 to 10,
The rollers 3 and 4 are divided into a downstream portion 3a and an upstream portion 3b, and a screw thread forming portion 4a and an upstream portion 4b.
As shown in the cross section of the roller 3 in FIG.
Each of them is individually driven to rotate via 33.

A roller 3 including dual shaft structures 32, 33,
4 is a support leg 132 integrally formed with the hopper 12
Of the inner shafts 30, 3 on the support frame 133 attached to one side of the rollers 3, 4 sandwiching the hopper 12 in the axial direction.
1, one end of which is supported, and the other end of the inner shafts 30 and 31 is supported by a support frame 36 which is attached to the outside of the screw supply unit 35 provided on the other side of the hopper 12.
The downstream side portion 3a and the screw thread forming portion 4a of the rollers 3 and 4 are fixed to the outer peripheral portions of 0 and 31, and both ends of the upstream side portions 3b and 4b are supported on the outer peripheral surfaces of the inner shafts 30 and 31, respectively.

The drive gear 38 provided on the output shaft 37 of the geared motor 136 attached to the one support frame 133 is attached to the inner shaft 30 of the roller 3 as shown in FIGS.
Of the small diameter driven gear 39 provided at one end of the roller 4 and the large diameter driven gear 41 provided at one end of the inner shaft 31 of the roller 4, and the downstream side portion 3a of the rollers 3 and 4 and the screw thread formation. The portion 4a and the portion 4a can be simultaneously driven while satisfying the conditions shown in FIG.

Further, another geared motor 42 is provided inside the support leg 132 and is attached to a part of the support leg 132 by utilizing the support frame 55. At the same time, an intermediate transmission is made to one side of the one support frame 133. A pulley 4 provided by bearing a shaft 43 and provided on an output shaft 45 of a geared motor 42.
4 and a pulley 46 provided at one end of the intermediate transmission shaft 43 are connected by a timing belt 47, and a drive gear 48 provided at the other end of the intermediate transmission shaft 43 is supported by the support frame 133 along with the intermediate transmission shaft 43. The roller 3 through the fixed intermediate gear 52
By connecting the driven gear 49 provided on the outer periphery of the upper end of the upstream side portion 3b of the roller 4 and the driven gear 50 provided on the upper end of the upstream portion 4b of the roller 4 by the idler gear 51, The upstream portions 3b and 4b of the motors 3 and 4 are driven simultaneously while satisfying the conditions shown in FIGS. 3 (a) to 3 (c).

Further, the downstream side portion 3a, the screw thread forming portion 4a and the upstream side portions 3b and 4b of the rollers 3 and 4 are driven by different geared motors 136 and 42, respectively. Can be easily driven.

Further, another intermediate transmission shaft 56 is mounted on the support frame 55 as a bearing, and a driven gear 57 provided in the middle of the intermediate transmission shaft 56 is provided in the middle of the output shaft 45 of the geared motor 42. While being engaged with the drive gear 58, a pulley 59 provided at one end of the intermediate transmission shaft 56 and a rear surface of the scraping drum 11 rotatably supported by a rotation shaft 62 on a support frame 60 attached to a support leg 132. The pulley 162 having the timing belt 63
Connected by.

As a result, the scraping drum 11 shares the geared motor 42 and the upstream side portion 3 of the rollers 3 and 4.
Driven and stopped at the same time as b, 4b, and the upstream side parts 3b, 4
Since the scraping drum 11 also stops when b is stopped, it is possible to completely stop the alignment and supply of the screw 1, and it is easy to prevent or eliminate clogging in the downstream.

Incidentally, in the embodiment shown in FIG. 11C, the driving of each of the three divided parts of the rollers 3 and 4 has a triple shaft structure in accordance with the above-mentioned embodiment, and each is driven by an individual motor. It may be driven. However, other methods can also be adopted.

The brush member 6 together with the geared motor 64 utilizing a reversible motor for driving the brush member 6 and the support leg 13
2 is supported by a support frame 164 attached to the other side of the gear 2, and the output shaft 65 and the gear train 66 of the geared motor 64 are supported.
And is rotatably driven in an appropriate direction as necessary as described above.

Immediately below the downstream ends of the rollers 3 and 4,
An input port 73 for supplying the delivered screw 1 to the air supply path is opened, and one screw 1 is dropped at a predetermined time interval, for example, every 2-3 seconds. The inlet 73 communicates with the air carrying path 74, and at the same time as the shutter provided between the two is opened, air acts, and the inlet 73 is opened.
The screw 1 supplied to the above is conveyed by air.

However, the screw 1 aligned and supplied to the downstream end of the rollers 3 and 4 may be picked up by a suction nozzle and used.

[0053]

According to the stud screw feeding device of the main feature of the present invention, from the above configuration and operation, the stud screw for feeding and dropping the first feeding means to a predetermined position in a random state is provided.
It is received by the upper ends of a pair of rollers which are arranged adjacent to each other and are driven to rotate in an inclined posture which forms the conveying means of the above, and the foot portion of the received tack screw is utilized by the roundness of the roller surface and the transfer force by rotation. The roller of the brush member positioned downstream of the portion for receiving the falling stud screw on the roller pair in order to receive it between the rollers with a high probability, smoothly slide it to the lower end side of the roller pair and supply it to the destination. By a synergistic effect of rotation about an axis substantially parallel to the axis of and the rotation of each roller, even with a type of stud screw whose head is easily caught, avoiding the inconvenience that this bites between the rollers,
If you have an unstable stud like a double sems screw,
Prevents removal of aligned studs and studs in a state similar to this, and also reliably removes stable studs in an unaligned state to supply unaligned studs mixed with the aligned studs To prevent jamming and clogging due to the misaligned stud screw blocking the flow of the aligned stud screw to the downstream side. You can get the number and supply smoothly.

In the case where the brush member has a structure in which the front end side facing the upper end side of the roller pair is tapered, a large number of rivets are still provided between the rollers because they are immediately received by the roller pair. The brush member works strongly while it is not being received, and it does not eliminate them, and in the space between the tapered shape part and the roller pair, the upstream side is large and the downstream side is small. By guiding the stud screws received by the roller pair so as to gather in the inter-roller portion, and by making it easy for the foot portion of the stud screw to be received between the rollers,
Since the alignment efficiency is further increased, the supply number is further increased.

Further, in the case where the brush member is formed so that the tips of the bristles are arranged in a spiral shape, the brush member comes into contact with the rivet screw which is received on the roller pair and flows to the downstream side, and exerts on them. By selecting the upstream or downstream transfer direction according to the rotation direction, the types of tack screws that are difficult to remove in a misaligned state can be prevented from progressing to the downstream side to increase the removal rate of biased row screws. It is possible to avoid clogging due to the biasing row stud screw, and the kind of stud screw that is easily eliminated even in the aligned state accelerates the progress to the downstream side and prevents the aligned stud screw from being eliminated, and the number of supply Can be prevented from decreasing.

A screw thread is formed on the outer peripheral surface of the lower end portion of one roller of the roller pair, and the tack screws that are transported in an aligned state between the rollers are received one by one between the screw threads and are conveyed to the front. In the one configured to be able to send out, the stud screw which receives the feet between the rollers and is aligned and pushed toward the lower end while being pushed by the subsequent stud screw, at the screw thread forming portion of the lower end portion of the roller, 1 from the previous one in the spiral thread pile
It is possible to prevent the supply of the studs from being disturbed and the supply destination side to be confused by taking in one by one and feeding them one by one by feeding them out.

Further, in the structure in which the rollers having at least the screw thread forming portion of the roller pair are separated into the screw thread forming portion and the upstream side and are driven to rotate independently of each other, the screw thread forming portion is formed. The part is stopped when consumption of the studs is stopped, avoiding the wasteful supply and the confusion that the studs are clogged on the supplied side due to excessive supply, while maintaining the upstream side. The parts continue to rotate to replenish the alignment studs, or the studs are intermittently supplied one by one by intermittent rotation, or there is sufficient alignment studs in the upstream part. When the amount has been reached, it is possible to stop the upstream side part to prevent useless alignment operation and excessive alignment studs that have an adverse effect on the downstream side. Rotate faster than the side part, and the screw thread forming part Since studs threadedly upstream can be avoided that would cause clogging, it can be surely achieved even more smoothly supply Byonishi.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a stud screw supply device and a normal screw and a double-sems screw according to an embodiment of the present invention.

2 is a perspective view showing a stud screw feeding end portion of the apparatus of FIG. 1. FIG.

3 is a plan view showing a conveying means for aligning and supplying the apparatus of FIG. 1, and a transverse sectional view showing a synergistic state of a roller pair and a brush member of the conveying means according to respective rotation directions. .

4A and 4B are a side view and a cross-sectional view showing the relationship between the roller pair and the shape of the brush member of the apparatus of FIG.

5 is a plan view showing the overall configuration of the apparatus of FIG.

6 is a front view of a cross section of the screw alignment and supply unit of the apparatus of FIG.

FIG. 7 is a cross-sectional view of the device of FIG. 5 taken across the threaded, feed section.

8 is a side view of the device of FIG.

9 is a rear view of the device of FIG.

10 is a side view of the device of FIG. 5 on the side opposite to that of FIG. 8;

FIG. 11 is a plan view showing a screw alignment and supply unit according to some other embodiments.

[Explanation of symbols]

 1 Screw 1a Foot part 2 1st conveyance means 3, 4 Roller 4a Screw thread formation part 4b Upstream side part 5 2nd conveyance means 6 Brush member 6a Tapered shape part 6b Hair 22 Screw thread

Claims (5)

[Claims] 1. A first transporting means for transporting and dropping a stud screw to a predetermined position in a random state, and a pair of rollers which are adjacently arranged in an inclined posture and are rotationally driven. The second conveying means for receiving the dropped studs and aligning the legs of the studs by receiving them between the rollers and sliding and transferring the studs to the lower end side, and the studs of the roller pair. A tack screw supply device comprising: a brush member that is provided on a portion downstream of a receiving portion and that is driven to rotate about an axis substantially parallel to an axis of the roller pair. 2. The method for supporting a substrate according to claim 1, wherein the brush member has a taper shape on a front end side facing the upper end side of the roller pair. 3. The stud screw supply device according to claim 1, wherein the brush member is formed such that the tips of the bristles are arranged in a spiral shape. 4. A screw thread is formed on the outer peripheral surface of the lower end portion of one roller of the roller pair, and one rivet screw is conveyed between the rollers in an aligned state, and the screw threads are received one by one between the screw threads. The stud screw supply device according to any one of claims 1 to 3, which can be conveyed and sent out. 5. A roller pair having at least a screw thread forming portion of the roller pair is separated into a screw thread forming portion and an upstream side, and is independently driven to rotate.
The rivet screw feeder described in.