JP2010083630A - Screw supply machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw supply machine capable of excellently carrying even a waterproof screw having an elastic O-ring by vibration. <P>SOLUTION: The screw supply machine P includes a rail unit 20 for aligning and carrying the screw 10 with an O-ring 16 in a predetermined direction. A step fittable with the O-ring 16 of the screw 10 is formed in a groove 40 arranged in the trail unit 20. A rail plate member 50 for supporting a shaft of the screw 10 from the lower side and forming a predetermined clearance G<SB>1</SB>between a head of the screw 10 and an upper end surface of the rail unit 20 is arranged in the groove 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a screw supply machine that supplies screws such as screws and rivets, and more particularly, to a screw supply machine that can well transport screws with an O-ring having waterproofness.

  2. Description of the Related Art Conventionally, there is known a screw feeder that discharges screws such as screws and rivets from a storage unit and transports them by a rail unit, and supplies them by taking them out with a tool such as a screwdriver at a predetermined position (Patent Literature). 1 and 2). In the case of this type of screw supply machine, the screw tightening work can be reduced, or the screw can be automatically tightened by a robot or the like.

  In such a screw supply machine that supplies screws, a plurality of screws can be sequentially transferred to a predetermined position in a state in which the screws are fitted and aligned in the groove of the rail unit.

[Outline configuration of screw supply machine]
The configuration and outline of a conventional screw feeder will be briefly described below. FIG. 10 is a perspective view showing an external appearance of a conventional screw feeder. Moreover, FIG. 11 is sectional drawing which shows the rail unit and screw mounted in the screw supply machine of FIG. FIG. 12 is a cross-sectional view showing a rail unit and screws with an O-ring mounted on a screw feeder.

  As shown in FIG. 10, the screw feeder P includes a housing part 2 provided in the machine base 1 and housing a large number of screws 10 ′, and a discharge mechanism for discharging the rail unit 3 from the inside of the housing part 2. (Not shown) and a brush mechanism (not shown) for inserting and aligning the plurality of discharged screws 10 ′ with the brush.

  Moreover, the conveyance part (not shown) which conveys screw 10 'aligned in the inside of the groove part 4 (FIG. 11) of the rail unit 3 to a predetermined position with a vibration is provided. And the screw conveyed to the predetermined position (screw stop part) by the conveyance part of this screw supply machine P is taken out with tools, such as a driver.

JP 2001-277145 A JP-A-8-155758

  However, the following problems occur in the case of the above-described screw feeder. That is, conventionally, in the case of the screw 10 ′ (FIG. 11) supplied by the screw supply machine P, the head portion 11, the shaft portion 12, the jaw portion 13 that is the lower surface position of the head portion 11, and the shaft portion 12. The neck portion 14 is an upper portion, and the tip portion 15 is located at the lower end portion of the shaft portion 12.

  Since the material of the screw 10 'is made of metal such as iron, the screw 10' fitted in the groove 4 of the rail unit 3 (FIG. 11) is relatively easy only by applying vibration. Can be transported to a predetermined position.

  Here, the screws used for fixing covers of small portable devices (for example, cellular phones) are screws with extremely small diameters (about M1.2 to M2) because the cellular phones are miniaturized. in use.

  Further, in recent years, an elastic body (rubber member) having a waterproof action is used for the shaft portion 12 (position of the neck portion 14) of the screw 10 as shown in FIG. A fixed O-ring 16 is attached.

  Here, when the outer dimension of the O-ring 16 is large, it is possible to manually fit only the O-ring 16 into the shaft portion 12 of the screw 10, but the screw 10 with the O-ring 16 is waterproof. Since it is a screw for a cellular phone as a mold, it is difficult to fit only the O-ring 16 into the screw shaft 12 with tweezers or the like. Therefore, it is common to fit the O-ring 16 into the screw 10 beforehand. Is.

  For the reason described above, when the screw 10 provided with the waterproof O-ring 16 in advance is supplied by a screw feeder, the screw 10 is connected to the upper surface of the groove portion 4 of the rail unit 3 as shown in FIG. It will be transported in the state of getting on. For this reason, even if it is going to convey the screw 10 by the vibration of the rail unit 3, since the O-ring 16 is an elastic body, it absorbs the vibration and the vibration is not easily transmitted to the screw. Similarly, since the elastic O-ring 16 is in contact with the groove 4 of the rail unit 3, the coefficient of friction increases, and as a result, problems such as conveyance clogging of the screw 10 occur.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art, and provides a screw feeder that can transport a waterproof screw having an elastic O-ring well by a rail unit. The purpose is to do.

  The disclosed screw supply machine includes a rail unit that conveys screws with an O-ring aligned in a predetermined direction, and a step in which an O-ring provided on the screw can be fitted into a groove provided in the rail unit. A screw support member that supports the shaft portion of the screw from below, and the screw support member has a predetermined gap between the lower end surface of the screw head and the upper end surface of the groove portion. It is a requirement to support the tip of the screw shaft so that is formed.

  Since the groove portion of the rail unit of the disclosed screw supply machine is provided with a step portion into which a screw O-ring can be fitted, and a screw support member that supports the tip of the shaft portion of the screw is provided. A predetermined gap is formed between the screw fitted in the groove portion and the rail unit, so that the screw O-ring and the groove portion do not come into contact with each other, and even a waterproof screw having an elastic O-ring can be used. It can be transported well.

  Embodiment 1 of a screw feeder according to the present invention will be described in detail below with reference to the accompanying drawings. In addition, this invention is not limited by Example 1 shown below.

[Configuration and overview of screw feeder]
First, the configuration and outline of the screw feeder according to the first embodiment will be described. Here, FIG. 1 is a perspective view showing an appearance of a rail unit mounted on the screw feeder according to the first embodiment.

  FIG. 2 is a perspective view showing an appearance of a rail plate member provided in the rail unit. FIG. 3 is a cross-sectional view showing the rail unit and the rail plate member. 4 shows an enlarged cross-sectional view of part A in FIG. 1, and FIG. 5 shows an enlarged cross-sectional view of part B in FIG.

  Here, the screw feeder P according to the first embodiment has a feature in the rail unit 20 mounted on the screw feeder P. When roughly described, the rail unit 20 includes the rail unit 20. A rail plate member is formed in the provided groove portion 40 so as to fit the O-ring 16 provided on the shaft portion 12 of the screw 10 and is supported on the inner side (groove portion 40) of the rail unit 20 from the lower side of the screw 10. 50 is provided.

  That is, as shown in FIG. 1 to FIG. 3, the rail unit 20 mounted on the screw feeder P is composed of a long steel plate member as a whole, and the groove portion 40 extends substantially over the longitudinal direction of the central portion. Is formed. The groove 40 can be inserted in a state where the plurality of screws 10 are aligned.

  Moreover, the groove part 40 (FIG. 3) formed in the substantially center part of the rail unit 20 has the outer side groove part 42 which is the step part 41 used as the opening part of this groove part 40, and the inner side groove part 43, and this An O-ring 16 provided on the screw 10 can be fitted into a step 41 provided on the groove 40. In addition, a rail plate member 50 described later is provided on the inner side (downward position) of the groove portion 40 provided in the rail unit 20.

  As shown in the figure, the rail unit 20 includes rail body portions 21 and 22 having an L-shaped cross section, and a rail base portion 30 connected and fixed to the rail body portions 21 and 22. One end side of these rail body portions 21 and 22 (right side in FIG. 1) is a protruding plate portion 20a that is continuous with the rail body portions 21 and 22 and protrudes toward one end side.

  The rail base portion 30 has a base body portion 31 and a bent plate portion 32 in which a part of the base body portion 31 is bent at a right angle.

  Further, a pair of through holes 23 for fastening and fixing the rail plate member 50 at predetermined positions are formed at both side positions (left and right both sides in FIG. 1) of the rail body portion 21 of the rail unit 20. On the other hand, a pair of screw holes 25 (FIG. 3) for screwing the fastening screws 24 (FIG. 2) inserted through the pair of through holes 23 are formed at both side positions of the rail body 22. . That is, as will be described later, the rail plate member 50 can be fastened and fixed at a predetermined height position using a pair of fastening screws 24 inserted through a pair of through holes 23 of the rail body 21.

[Configuration of rail plate member 50]
As shown in FIG. 2, the rail plate member 50 has a main body plate portion 51 composed of a long steel plate member as a whole and a lower plate portion 52 connected and fixed below the main body plate portion 51. is doing. As shown in FIG. 3, the thickness dimension of the main body plate portion 51 and the lower plate portion 52 of the rail plate member 50 is formed to be approximately the same as that of the inner groove portion 43 of the groove portion 40.

  Further, a pair of fastening screws 24 are inserted into both side positions (the left and right sides in FIG. 2) of the lower plate portion 52 of the rail plate member 50, and the rail plate member 50 is cut to fasten and fix the rail plate member 50 at a predetermined position. A notch 53 is formed.

The rail plate member 50 has a predetermined gap between the jaw portion 13 (lower end surface) of the head portion 11 of the screw 10 with the O-ring 16 and the upper end surface 20 ′ (FIG. 4) of the rail unit 20 (rail body portion 22). as the gap G ₁ is formed, it has a function of supporting the front end portion 15 of the shank 12 of the screw 10 from the lower side. Further, the height adjustment according to the size of the screw 10 in this case can be performed by the height adjusting mechanism 54 that adjusts the support position of the screw 10 with respect to the distal end portion 15 of the shaft portion 12 by the rail plate member 50.

  The height adjusting mechanism 54 can fasten the rail plate member 50 to a predetermined position of the rail unit 20 via a notch 53 formed at a predetermined position of the rail plate member 50.

More specifically, when the adjustment by the height adjusting mechanism 54 (FIG. 3) is performed, when the position of the fastening screw 24 with respect to the notch 53 is set to the upper side (a direction), the height of the screw 10 is also set to the upper side (a increasing gap G ₁ to move in the direction), when the position of the fastening screw 24 in opposite to the lower side (b direction), the height of the screw 10 is also lower (b direction) for next gap G ₁ is reduced Thus, the height adjustment mechanism 54 adjusts the size of the screw 10 (the length of the screw 10 and the type of the O-ring 16).

Then, in this way depending the height adjustment mechanism 54 to the size of the screw 10, where it was able to secure a predetermined gap G ₁ can be a screw 10 with O-ring 16, the screw 10 can move within the groove portion 40 of the rail unit 20 while swinging left and right (in the direction of the arrow in FIG. 4) without touching the stepped portion 41. The transportability of the screw 10 can be improved.

  Here, as described above, it is necessary to adjust the height of the rail plate member 50 by the height adjusting mechanism 54 according to the length of the screw 10 and the type of the O-ring 16. If you want to use more than one, you can prepare the completed rail unit of the first embodiment in the same quantity as the type of screws with O-rings. It is possible to correspond to the types of screws and O-rings.

[Example of set dimensions by rail unit groove and rail plate member]
Next, an example of the dimension set by the groove (step) of the rail unit and the rail plate member suitable for the O-ring screw set by the inventors of the present invention will be described. FIG. 6 is a diagram for explaining an example of set dimensions by the groove portion of the rail unit and the rail plate member.

As shown in FIG. 6, the diameter D ₁ of the head 11 of the screw 10 is 4 mm (D ₁ = 4 mm), the outer dimension D ₂ of the O-ring 16 is 2.6 mm (D ₂ = 2.6 mm), and the O-ring. 16 has a height dimension of 0.6 mm (H ₁ = 0.6 mm), and the diameter dimension of the shaft portion 12 of the screw 10 with the O-ring 16 is 1.6 mm (M1.6: D ₃ = 1.6 mm). In this case, the width D ₄ of the rail plate member 50 provided in the rail unit 20 is set as 1.7 mm to 1.9 mm (D ₄ = 1.7 mm to 1.9 mm). That is, the width D ₄ of the rail plate member 50 is set as a width that is about 0.1 to 0.3 mm wider than the diameter (D ₃ ) of the shaft portion 12 of the screw 10.

D _5, which is the step width of the step portion 41 of the groove portion 40 of the rail unit 20, is wider than the outer dimension D ₂ of the O-ring 16 and smaller than the diameter dimension (D ₁ ) of the head 11 of the screw 10 (D ₅ = 3 mm).

Further, the step height H ₂ of the step portion 41 formed in the groove portion 40 of the rail unit 20 is set as a dimension (about 1 mm) higher than the height H ₁ of the O-ring 16. Further, the gap _{G 1} between the thread jaw 13 and the rail upper surface portion 20 'of the screw 10 is set to about 0.3 to 0.5 mm. Here, as described above, adjustment of the gap G ₁ between the thread jaw 13 and the rail upper surface portion 20 'of the screw 10, the height adjusting mechanism provided on the rail plate member 50 is performed by 54 (Figure 3).

Here, when the gap G ₁ is large, specifically, when the head 11 of the screw 10 is relatively large protruded from the upper surface of the rail unit 20 is dropped by a brush of a brush mechanism (not shown) In order to prevent such a fall due to the brush, in this case, the brush should not be strongly applied to the screw 10.

[Conveyor shutter configuration]
Next, the configuration of the transport shutter mounted on the screw feeder P will be described with reference to FIGS. Here, FIG. 7 is a perspective view showing the appearance of the rail unit and the conveyance shutter. FIG. 8 is a diagram for explaining the operation of the transport shutter. FIG. 9 is an enlarged perspective view showing the overall configuration of the transport shutter.

  As shown in FIG. 7, at a downstream position of the rail unit 20 (on the right side in FIG. 7), there is a conveyance shutter 60 that is a steel plate member that conveys the screw 10 transferred by the rail unit 20 to a predetermined position. Is provided. A U-shaped groove 61 for taking in the screw 10 transferred by the rail unit 20 is formed at the edge of the transport shutter 60.

  As shown in FIGS. 7 and 8, the screw 10 transferred by the rail unit 20 is transported to a predetermined position by the transport shutter 60 moving in the arrow direction by engaging with the groove portion 60 of the transport shutter 60. . Further, a step portion 62 into which the O-ring 16 provided on the screw 10 can be fitted is formed in the groove portion 61 formed in the transport shutter 60.

  That is, the transport shutter 60 is reciprocated in the direction of the arrow in the drawing on the one end side of the rail unit 20 (the right side in FIG. 8), so that the screw 10 transferred by the rail unit 20 is the groove portion 60 of the transport shutter 60. It can be taken in by this conveyance shutter 60.

  Even when the screw used in the screw feeder P is the screw 10 with the O-ring 16, the O-ring 16 of the screw 10 is fitted into the stepped portion 61 of the groove portion 60, so that the screw 10 is used as the conveyance shutter. The screw 10 can be reliably conveyed to a predetermined position while being prevented from falling from the groove portion 60 of the 60.

As described above, the screw feeder P according to the first embodiment includes the rail unit 20 that conveys the screw 10 with the O-ring 16 aligned in a predetermined direction, and the groove portion 40 provided in the rail unit 20. Is formed with a step portion 41 into which the O-ring 16 provided in the screw 10 can be fitted, and the groove portion 40 is provided with a rail plate member 50 that supports the screw 10 from below, and the rail plate member 50. , as predetermined gap G ₁ is formed between the upper end surface 20 'of the lower end surface and the rail unit 20 of the head 11 of the screw 10, so as to support the front end portion 15 of the shaft portion 11 of the screw 10 Therefore, even a waterproof screw having an elastic O-ring can be transported satisfactorily without causing transport clogging.

(Other examples)
Now, the first embodiment of the present invention has been described so far, but the screw feeder of the present invention is not limited to the first embodiment described above, and can be variously used within the scope of the technical idea described in the claims. It can also be implemented in different embodiments.

That is, in Example 1 mentioned above, while forming the step part 41 in the groove part 40 provided in the rail unit 20, the axial part 12 of the screw 10 with the O-ring 16 is supported from the lower side, and the head 11 of the screw 10 is provided. and although a configuration in which the rail plate member 50 to form a gap G ₁ between the rail unit 20, further, by an inclined portion instead of a groove 40 in the flat path, with O-ring 16 to move the groove 40 It is good also as a structure which improves the conveyance of the screw 10 of this.

  Regarding the embodiment including the above-described Example 1, the following additional notes are further disclosed.

(Supplementary Note 1) A screw housing portion that houses a plurality of screws including a head portion and a shaft portion having an O-ring, a discharge mechanism that sequentially discharges screws from the screw storage portion, and a screw that is discharged by the discharge mechanism In a screw feeder including a rail unit having a groove portion that can be conveyed in a certain direction with the shaft portion inserted,
A screw feeder, wherein a step portion into which the O-ring provided in the screw is fitted is formed in the groove portion provided in the rail unit together with the shaft portion of the screw.

(Additional remark 2) The screw accommodating part which accommodates the some screw | thread which consists of a head part and the axial part which has O-ring, The discharge mechanism which discharges a screw one by one from the said screw accommodating part, The said screw discharged | emitted by the said discharge mechanism In a screw feeder including a rail unit having a groove portion that can be conveyed in a certain direction with the shaft portion inserted,
A step portion into which the O-ring provided in the screw can be fitted is formed in the groove portion provided in the rail unit together with a shaft portion of the screw, and the shaft portion of the screw is provided in the groove portion. A screw support member is provided to support from below,
The screw support member supports a tip end portion of a shaft portion of the screw so that a predetermined gap is formed between a lower end surface of a head portion of the screw and an upper end surface of the groove portion. Screw supply machine.

(Supplementary Note 3) The screw support member has a shaft portion of the screw that is formed by the screw support member so that a predetermined gap is formed between the lower end surface of the screw head and the upper end surface of the groove. The screw feeder according to appendix 2, further comprising a height adjusting mechanism for adjusting a support position with respect to the tip portion.

(Additional remark 4) The said height adjustment mechanism is provided with the fastening member which fastens the said screw support member to the predetermined position of the said rail unit through the notch part formed in the predetermined position of the said screw support member. The screw feeder according to Supplementary Note 3, wherein

(Supplementary Note 5) The lateral groove size of the groove portion provided in the rail unit is larger than the diameter size of the shaft portion of the screw and the diameter size of the O-ring provided in the shaft portion, and the head portion of the screw The height dimension of the step portion provided in the groove portion of the rail unit is substantially the same as or slightly higher than the height dimension of the O-ring. The screw feeder according to appendix 1, 2, or 3, wherein the screw feeder is set to have a high dimension.

(Additional remark 6) The vertical groove dimension of the said groove part provided in the said rail unit is set to the dimension which the front-end | tip part of the axial part of the said screw contacts slightly, The additional notes 1-5 characterized by the above-mentioned. Screw supply machine as described in any one.

(Additional remark 7) The said screw supply machine is further provided with the transfer shutter which transfers the some screw | thread which consists of the said axial part which has the said head and the said O-ring to a predetermined position, The shaft of the said screw | thread is included in the said transfer shutter. The screw feeder according to any one of appendices 1 to 6, wherein a groove portion in which a step portion into which the O-ring can be fitted is formed together with the portion.

(Additional remark 8) The O-ring provided in the axial part of the said screw is an elastic member which has waterproofness, The screw supply machine as described in any one of additional remark 1 to 7 characterized by the above-mentioned.

  INDUSTRIAL APPLICABILITY The present invention is useful for a screw supply machine that supplies screws, and in particular, even a waterproof screw having an elastic O-ring provided on a rail unit can be transported well without being jammed. Effective for screw supply machines.

It is a perspective view which shows the external appearance of the rail unit mounted in the screw supply machine which concerns on Example 1. FIG. It is a perspective view which shows the external appearance of the rail board member provided in a rail unit. It is a longitudinal cross-sectional view which shows a rail unit and a rail board member. It is an expanded sectional view of the A section of FIG. It is an expanded sectional view of the B section of FIG. It is a figure explaining an example of the setting dimension by the groove part and rail board member of a rail unit. It is a perspective view which shows the external appearance of a rail unit and a conveyance shutter. It is a figure explaining operation | movement of a conveyance shutter. It is an expansion perspective view of a conveyance shutter. It is a perspective view which shows the external appearance of the conventional screw feeder. It is sectional drawing which shows the rail unit and screw which were mounted in the conventional screw supply machine. It is sectional drawing which shows the rail unit mounted in the conventional screw supply machine, and the screw with an O-ring.

Explanation of symbols

3, 20 Rail unit 4, 40, 61 Groove part 10, 10 'Screw 11 Head part 12 Shaft part 13 Neck part 14 Jaw part 15 Tip part 16 O-ring 21, 22 Rail body part 30 Rail base part 31 Bending part 41, 62 Step Part 42 outer groove part 43 inner groove part 50 rail plate member 51 main body part 52 lower plate part 53 notch part 54 height adjusting mechanism 60 transport shutter

Claims (6)

A screw accommodating portion for accommodating a plurality of screws including a head portion and a shaft portion having an O-ring, a discharging mechanism for sequentially discharging the screws from the screw accommodating portion, and a shaft portion of the screw discharged by the discharging mechanism are inserted. In a screw feeder provided with a rail unit having a groove portion that can be conveyed in a certain direction in a state where
A screw feeder, wherein a step portion into which the O-ring provided in the screw is fitted is formed in the groove portion provided in the rail unit together with the shaft portion of the screw. A screw accommodating portion for accommodating a plurality of screws including a head portion and a shaft portion having an O-ring, a discharging mechanism for sequentially discharging the screws from the screw accommodating portion, and a shaft portion of the screw discharged by the discharging mechanism are inserted. In a screw feeder provided with a rail unit having a groove portion that can be conveyed in a certain direction in a state where
A step portion into which the O-ring provided in the screw can be fitted is formed in the groove portion provided in the rail unit together with a shaft portion of the screw, and the shaft portion of the screw is provided in the groove portion. A screw support member is provided to support from below,
The screw support member supports a tip end portion of a shaft portion of the screw so that a predetermined gap is formed between a lower end surface of a head portion of the screw and an upper end surface of the groove portion. Screw supply machine.   The screw support member supports the tip of the shaft portion of the screw by the screw support member such that a predetermined gap is formed between the lower end surface of the screw head and the upper end surface of the groove. The screw feeder according to claim 2, further comprising a height adjusting mechanism for adjusting the position.   The lateral groove size of the groove portion provided in the rail unit is larger than the diameter size of the shaft portion of the screw and the diameter size of the O-ring provided in the shaft portion, and from the diameter size of the head portion of the screw. The height of the step provided in the groove of the rail unit is substantially the same as or slightly higher than the height of the O-ring. The screw feeder according to claim 1, 2 or 3, wherein the screw feeder is set as follows.   5. The vertical groove size of the groove portion provided in the rail unit is set to a size at which the tip end portion of the shaft portion of the screw slightly contacts. 5. Screw supply machine described in 1.   The screw feeder further includes a transfer shutter that transfers a plurality of screws including a shaft portion having the head and the O-ring to a predetermined position, and the transfer shutter includes the screw shaft portion and the screw portion. The screw feeder according to any one of claims 1 to 5, wherein a groove portion in which a step portion into which an O-ring can be freely inserted is formed.

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