JP4239098B2 - Projection nut parts feeder and separation method - Google Patents

Description

  The present invention provides a configuration suitable for separating a projection nut adhered with rust-preventing oil in a parts feeder that sends out a projection nut (hereinafter sometimes simply referred to as a nut).

  In a parts feeder that vibrates a bowl containing a projection nut and sends out parts, an arc-shaped part conveyance path is provided along the outer wall plate of the substantially circular bowl, and projection is performed while the part conveyance path is moving. By distinguishing the front and back of the nut, either a front or back projection nut is not sent out. The projection nut is coated with rust preventive oil so that the rusted projection nut is not supplied to the target location.

Also, as shown in various parts moving along the parts conveyance path, for example, Japanese Patent Laid-Open No. 6-293429, the direction of the knob part of the fastener used for the bag, pants, etc. is abnormal. In such a case, it is known that the next part conveyance path structure portion cannot be passed in a normal posture, so that a rollover truck is arranged at a position one step lower in the component conveyance path to correct the posture of the knob portion.
JP-A-6-293429

  As described above, when the projection nut is coated with rust preventive oil and the side surface of the nut is flat, the side surface of the first nut facing up and the side surface of the second nut facing down May stick to the rust preventive oil. Here, when the nut facing up is sent out from the parts feeder assuming that it is in the normal direction, if the sticking phenomenon as described above occurs, the nut facing away from the abnormal direction is removed from the parts conveying path. It will occur that it is fed from the parts feeder together with a normal nut without any problems. In this way, when an abnormally facing nut is supplied to, for example, a welding machine, normal welding is not performed on the counterpart steel plate component, and the steel plate component without the weld nut flows to the subsequent process. This will cause confusion in the production line.

  Further, in the case of the knob portion of the fastener, as shown in FIG. 5 of the above-mentioned JP-A-6-293429, the rollover track disposed at a position one step lower in order to change the direction of the knob portion itself. Thus, the direction of only one knob portion is changed, and no measures are taken with respect to the relationship between adjacent parts, that is, the projection nut adhered with the antirust oil.

  The present invention is provided in order to solve the above-described problems, and is a parts feeder in which a projection nut adhered with a rust preventive oil is separated and a nut in an abnormal direction is not sent out from the parts feeder. The purpose is to provide.

Means to solve the problem

The present invention is provided to solve the above-described problems. The invention according to claim 1 is characterized in that the lateral side surface is a flat surface and welding projections are formed at the four corners on the back surface side. The projection nut is to be delivered, and an arc-shaped component conveyance path is provided along the outer wall plate of the substantially circular bowl, and the component conveyance path is formed between the upstream side in the conveyance direction and the downstream side in the conveyance direction. A step portion is formed in which a step is present and the component conveyance path on the downstream side in the conveyance direction is lowered, and a guide groove into which a projection of the projection nut is fitted is formed in the component conveyance path on the conveyance direction side of the step portion. is, the open portion for tumble projection nut from the component conveyance path cut and exterior panel is formed, characterized in that the external wall plate and the guide groove in the downstream side immediately after the step portion are allowed to overlap A parts feeder for Roger action nut.

According to a third aspect of the present invention, there is provided a projection nut having a lateral side surface which is flat and weld projections formed at four corners on the back side . An arc-shaped component conveyance path is provided along the outer wall plate, and there is a step between the conveyance direction upstream side and the conveyance direction downstream side in this component conveyance path, and the component conveyance path on the conveyance direction downstream side is lowered. A step groove is formed, a guide groove into which a projection projection of the projection nut is fitted is formed in the component conveyance path on the conveyance direction side of the step section, and the projection nut is tumbled from the component conveyance path by cutting out the outer wall plate. opening is formed, the stepped portion parts feeder to prepare for projection nut wall panels and the guide grooves are allowed to overlap in the downstream side immediately after, first projection Na The projection nut on the conveying direction side when at least two projection nuts in which the lateral surface of the second projection nut and the lateral surface of the second projection nut are adhered to each other by an adhesive portion made of rust preventive oil pass through the stepped portion. Is a method of separating a projection nut in a parts feeder for a projection nut, which is inclined by its own weight to cause a peeling phenomenon in the adhesive part.

The invention's effect

  According to the first aspect of the present invention, since the step portion in which the component conveyance path on the downstream side in the conveyance direction is lowered is formed in the component conveyance path, the two projection nuts adhered with the antirust oil are stepped. When the projection nut on the conveying direction side protrudes from the stepped portion when passing through the portion, the protruding nut is inclined due to its own weight and the sending vibration of the parts feeder, and a peeling phenomenon occurs in the adhesive portion. Therefore, even if the front-facing nut and the back-facing nut are adhered and integrated, both nuts are separated by the above-mentioned peeling phenomenon. Therefore, it is possible to prevent confusion in the subsequent process by sending only a normal facing nut from the parts feeder.

  Note that the nuts once separated do not stick again because they are individually vibrated in various directions by the feed vibration of the parts feeder.

That have guide grooves for welding protrusion is fitted in the projection nut component conveying path of the conveying direction of the front Kidan portion is formed.

  As described above, the projection nut protruding from the step portion exhibits a peeling phenomenon. At the same time, since a part of the projection nut enters the guide groove, the nut protruding from the stepped portion is inclined (twisted) with respect to the upstream nut, so that the peeling phenomenon and the inclination (twist) The phenomenon is combined and the adhesive state is reliably separated.

  Further, when the projection nut protruding from the step portion is face up with the welding projection on the lower side, the welding projection enters the guide groove and exhibits the tilt (twist) phenomenon at the same time. Along the part transport path as a nut of normal orientation and sent out from the parts feeder.

  Further, when the projection nut protruding from the stepped portion is facing backward with the welding projection on the upper side, the corner portion of the nut fits into the guide groove and exhibits the inclination (twist) phenomenon. When the nut facing backwards is completely separated and independent, the nut is in close contact with the surface of the component conveyance path, so that the corner is pulled out of the guide groove, and the component is conveyed. Due to the inclination of the path, the nut passes without entering the guide groove and falls off the part conveyance path. Therefore, even when the projection nut facing backwards protrudes from the stepped portion, an inclination (twist) phenomenon occurs and promotes the peeling of the adhesive portion. Will be.

The inclination (twist) phenomenon due to the guide groove as described above can be a constituent requirement of the separation method according to claim 3 .

According to a second aspect of the invention, the step size of the step portion is a claim 1 Symbol mounting projection parts feeder nut is 0.25 times to 0.5 times the height of the lateral sides of the projection nut .

  By setting the value of 0.25 times to 0.5 times as described above, the inclination angle of the projection nut protruding from the step portion can be sufficiently secured, and the oil film at the sticking place can be surely secured. The normal parts with high reliability can be delivered.

In the invention according to claim 3 , the force in the peeling direction is applied to the adhesive local area where the lateral side surface of the first projection nut and the lateral side surface of the second projection nut are adhered to each other by the adhesive portion made of rust preventive oil. The basic idea is to let the work.

  That is, since a stepped portion in which the component conveying path downstream in the conveying direction is lowered is formed in the component conveying path, when the two projection nuts adhered with the rust preventive oil pass through the stepped portion, When the direction-side projection nut protrudes from the stepped portion, the protruding nut is inclined due to its own weight and vibrations sent from the parts feeder, and a peeling phenomenon occurs in the adhesive portion. Therefore, even if the front-facing nut and the back-facing nut are adhered and integrated, both nuts are separated by the above-mentioned peeling phenomenon. Therefore, it is possible to prevent confusion in the subsequent process by sending only a normal facing nut from the parts feeder.

  Next, the best mode for carrying out the projection nut parts feeder and separation method of the present invention will be described.

  FIG. 1D is a perspective view of a projection nut 1 to be delivered in the present invention. The nut 1 has a square shape having a front surface 2 and a back surface 3 (see FIG. 5), and a screw hole 4 is provided at the center. The four lateral side surfaces 5 that are oriented in parallel with the axis of the screw hole 4 are formed of a plane. The welding projections 6 are formed at the four corners on the back surface 3 side. This welding projection 6 is formed when the nut 1 is made by plastic working, and the projection shape is formed by the flow of the material of the pressure deformation portion 7 on the surface 2 side.

  As shown in FIGS. 1A and 1B, the parts feeder 8 is of a type in which a vibrating portion 10 is disposed below the circular bowl 9. An arc-shaped component conveyance path 12 is provided along the outer wall plate 11 of the bowl 9, and an end thereof communicates with the delivery pipe 13. The component conveying path 12 has a long and narrow arc-shaped surface spirally formed along the inner side of the outer wall plate 11, and is inclined so that the outer peripheral side of the bowl 9 is lowered as a whole. The outer wall plate 11 is provided in an upright state in a substantially vertical direction.

  FIG. 1C is a plan view showing a detailed structure of the bowl 9, and a necessary portion is broken away. And the outer wall board | plate 11, the component conveyance path 12, etc. which are each structural part of the bowl 9 are formed by processing a steel plate.

  When the combined vibration in the arc direction and the vertical direction from the vibration generating unit 10 is transmitted to the bowl 9, the nut 1 moves from the lower part of the component conveyance path 12 to the higher part.

  In the present embodiment, the state in which the welding projection 6 is on the lower side, is transferred through the component conveying path 12 and is sent out from the delivery pipe 13 is “normal face-up”, on the contrary, the welding projection 6 is on the upper side. The state of being removed from the component transport path 12 is “abnormally facing backward”.

  The (A)-(A) cross section, (B)-(B) cross section, (C)-(C) cross section, and (D)-(D) cross section of FIG. 1 correspond to these step surfaces. 2 (A) to (D).

  FIG. 2 (A) is a place where the nut 1 facing downward is dropped into the bowl 1, and the inclined direction of the component conveying path 12 is reversed in this part, and as shown in FIG. The side is high. In this portion, arc-shaped two guide protrusions 14 are formed in parallel.

  When the nut 1 facing up is moved to the location of the guide protrusion 14, the welding protrusion 6 is caught on the guide protrusion 14 and does not fall into the bowl 9 as shown in FIG. It will be transferred. When the nut 1 facing backward moves, as shown in the figure, the surface 2 of the nut 1 slides down on the guide protrusion 14 and falls into the bowl 9, and the nut in the abnormal direction is removed. The

  FIG. 5 is a plan view showing a state in which the lateral side surface of the front-facing nut 1 on the downstream side in the transport direction and the lateral side surface of the back-facing nut 1 on the upstream side in the transport direction are adhered to each other due to the presence of rust preventive oil. A portion where the rust preventive oil is interposed is an adhesive portion, and is denoted by reference numeral 15. In FIG. 5, two nuts are adhered, but in some cases, three or four may be connected. The conveying direction is indicated by an arrow line 17.

  FIG. 2B is a cross-sectional view of the step portion 16 formed in the component conveyance path 12. The step portion 16 is formed in a state where the component conveyance path 12 on the downstream side in the conveyance direction is lowered. The conveying direction is indicated by an arrow line 17. The height of the stepped portion 16, that is, the step size L1, is in the range of 0.25 to 0.5 times, preferably 0.3 times the height L2 of the nut 1 (see FIG. 3A). It is -0.4 times, More preferably, it is 0.35-times-0.38 times. It was confirmed that, in the above-mentioned range of 0.25 to 0.5 times, the peeling phenomenon of the adhesive part described later can be obtained satisfactorily.

  The step size L1 is 2.2 millimeters, and the height of the nut 1 is 5.8 millimeters.

  As shown in FIG. 2C, the inner wall plate 18 is arranged in a state where the inner wall plate 18 stands from the position of the step portion 16 along the inner peripheral portion of the component conveying path 12. And in this cross-section part (FIG. 1 (C)-(C) cross-section part), the components conveyance path 12 is low in the outer peripheral side.

  As shown in FIG. 2D, the second step portion 16 is shown here from the front. The steel plate material forming the component conveying path 12 on the downstream side of the stepped portion 16 is set to have a wall thickness larger than that of the other portions, whereby a bottomed guide groove 19 is formed. As shown in FIG. 1C, the guide groove 19 is formed in an arc shape similar to the arc shape of the component conveyance path 12 and is disposed in the vicinity of the outer peripheral side end of the component conveyance path 12.

  The component conveyance path 12 where the guide groove 19 is formed is inclined so that the outer peripheral side becomes lower, like the component conveyance path 12 on the upstream side. In order to allow the back-facing nut 1 to slide and fall from the component conveying path 12 at the guide groove 19, the outer wall plate 11 is cut out to form an opening portion 20. As indicated by the symbol L3 entered in FIG. 1C, the outer wall plate 11 and the guide groove 19 overlap on the downstream side immediately after the stepped portion 16. By providing such an overlapping portion L 3, the welding protrusion 6 of the front-facing nut 1 that has moved while being inclined from the step portion 16 is surely fitted into the guide groove 19 by the guide of the outer wall plate 11. Yes.

  As shown in FIG. 2 (D), the reverse nut 1 that has fallen from the component conveying path 12 through the opening 20 enters the receiving box 21 attached to the outer periphery of the bowl 9, passes through the passage port 22, 9 is returned.

  4 is a (4)-(4) cross-sectional view of the overlapping portion L3 shown in FIG.

  In the third step portion 16 shown in FIG. 1C, a guide groove 19 is formed in both the upstream and downstream component transport paths 12 of the component transport path 12. By doing so, if the nuts 1 facing each other again adhere to each other, the welding projections 6 of the two nuts 1 that are adhered to each other are subjected to the separation action in the step portion 16 while being stuck in the guide groove 19. It is prepared to be. Thereby, it becomes possible to prevent both the nuts 1 from being removed from the guide groove 19, and the operation reliability of the parts feeder 8 can be improved.

  Hereinafter, the operation of this embodiment will be described.

  As shown in FIG. 5, the operation when the front nut 1 is face up and the rear nut 1 is face down as viewed in the transport direction will be described. Note that the reverse operation is the same when the front nut 1 is facing backward and the rear nut 1 is facing front.

  As shown in FIG. 3A, when the two nuts 1 adhered by the adhesive portion 15 reach the step portion 16, the projection nut 1 on the front side protrudes from the step portion 16, and the protruding nut 1 is It tries to incline due to its own weight and sending vibration. At this time, a force in the peeling direction acts on the adhesive part 15, and a peeling space 23 is formed above the adhesive part 15. When such a separation space 23 further proceeds, both nuts 1 are separated.

  Therefore, the front-facing nut 1 is fed from the parts feeder 8 as having a normal orientation with the welding projection 6 guided in the guide groove 19 in only one independent state. On the other hand, the rear-facing nut 1 also falls from the component conveying path 12 as shown in FIG. 2D without having its surface 2 locked in the guide groove 19 in one independent state. To do.

    Although not shown, when the two nuts 1 remain adhered and the rear portion of the rear nut 1 is locked to the stepped portion 16, the adhesive portion 15 is caused by the weight of the nuts 1 and the sending vibration. A separation space 23 is formed on the lower side. And this peeling space 23 expands and both nuts 1 isolate | separate.

  As shown in FIG. 3B, when the welding projection 6 of the front nut 1 fits into the guide groove 19, the nut 1 is peeled off as indicated by reference numeral 23 while the front nut 1 is angled θ. Only tilted or twisted. Therefore, since the peeling phenomenon as indicated by reference numeral 23 and the inclination (twist) phenomenon are combined, the adhesive portion 15 can be reliably separated.

  Such a tilting (twisting) phenomenon occurs in the same manner as described above because the corner of the back-facing nut 1 temporarily enters the guide groove 19 even when the front nut 1 is facing back.

  The effects of the above-described embodiment are listed as follows.

  Since the stepped portion 16 in the state where the component conveying path 12 on the downstream side in the conveying direction is lowered is formed in the component conveying path 12, when the two projection nuts 1 adhered with the rust preventive oil pass through the stepped portion 16. When the projection nut 1 on the conveyance direction side protrudes from the step portion 16, the protruding nut 1 is inclined by its own weight, and a peeling phenomenon occurs in the adhesive portion 15. Therefore, even if the front-facing nut 1 and the back-facing nut 1 are adhered and integrated, both the nuts 1 are separated by the above-described peeling phenomenon, so that the abnormal back-facing nut 1 is removed from the component conveying path 12. Thus, it is possible to prevent the subsequent process from being confused by sending out only the normal facing nut 1 from the parts feeder 8.

  A guide groove 19 into which the welding projection 6 of the projection nut 1 fits is formed in the component conveyance path 12 on the conveyance direction side of the stepped portion 16. As described above, the projection nut 1 protruding from the step portion 16 exhibits a peeling phenomenon. At the same time, since a part of the projection nut 1 enters the guide groove 19, the nut 1 protruding from the step portion 16 is inclined (twisted) with respect to the upstream nut 1 by an angle θ. The peeling phenomenon and the tilting (twisting) phenomenon are combined to reliably separate the adhesive state.

  Further, when the projection nut 1 protruding from the step portion 16 is face-up with the welding projection 6 on the lower side, the welding projection 6 enters the guide groove 19 and exhibits the tilt (twist) phenomenon. At the same time, the nut is moved along the guide groove 19 as a nut in a normal direction, and is transferred from the parts feeder 8.

  Further, when the projection nut 1 protruding from the step portion 16 is facing backward with the welding projection 6 on the upper side, the corner portion of the nut 1 fits into the guide groove 19 to cause the inclination (twist) phenomenon. However, if the nut 1 facing backward is completely separated and becomes independent, the nut 1 is in close contact with the surface of the component conveying path 12, so that the corner portion is the guide groove 19. The nut 1 passes through without entering the guide groove 19 due to the inclination of the component conveyance path 12 and falls off the component conveyance path 12. Therefore, even when the projection nut 1 facing backward protrudes from the step portion 12, an inclination (twist) phenomenon occurs and promotes the peeling of the adhesive portion 15. 12 will be excluded.

  The step dimension L1 of the stepped portion 16 is 0.25 to 0.5 times the height dimension L2 of the lateral side surface of the projection nut 1.

  By setting the value of 0.25 times to 0.5 times as described above, the inclination angle θ of the projection nut 1 protruding from the step portion 16 can be sufficiently secured, and the oil film at the sticking portion Can be reliably peeled off and reliable normal parts can be delivered.

  About the separation method, the lateral side surface 5 of the projection nut 1 on the front side and the lateral side surface 5 of the projection nut 1 on the rear side as viewed in the conveying direction are adhered to the adhesive local part that is in an adhesive state with an adhesive part 15 made of rust preventive oil The basic idea is to apply a force in the peeling direction.

  That is, since the step part 16 in the state where the component conveyance path 12 on the downstream side in the conveyance direction is lowered is formed in the component conveyance path 12, the two projection nuts 1 adhered with the antirust oil pass through the step part 16. When the projection nut 1 on the conveyance direction side protrudes from the step portion 16, the protruding nut 1 is inclined due to its own weight and the feed vibration of the parts feeder 8, and the force in the peeling direction is applied to the adhesive portion 15. This action causes a peeling phenomenon. Therefore, even if the front-facing nut 1 and the back-facing nut 1 are adhered and integrated, both the nuts 1 are separated by the above-described peeling phenomenon, so that the abnormal back-facing nut 1 is removed from the component conveying path 12. Thus, it is possible to prevent only the normal facing nut 1 from being sent out from the parts feeder 8 and causing confusion in the subsequent process.

  As described above, since the adhesion of the projection nut by the rust preventive oil is separated in the parts feeder, only the nut in the normal direction is sent out from the parts feeder. Therefore, a highly reliable nut supply can be realized and a wide demand can be met.

It is the external appearance side view which shows the parts feeder of this invention, a top view, the enlarged plan view of a bowl, and the perspective view of a projection nut. (A)-(D) are sectional drawings which show each cross section of FIG. It is the side view and front view which show the isolation | separation operation | movement of a nut. It is (4)-(4) sectional drawing of FIG.1 (C). It is a top view which shows the state which two nuts adhered.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projection nut 2 Front surface 3 Back surface 5 Side surface 6 Welding protrusion 8 Parts feeder 9 Bowl 11 Outer wall board 12 Parts conveyance path 15 Adhesion part 16 Step part 19 Guide groove 23 Separation space L1 Step dimension L2 Height dimension of nut side face

Claims (3)

It is intended to feed projection nuts whose side surfaces are flat and weld projections are formed at the four corners on the back side. Conveying arc-shaped parts along the outer wall plate of a substantially circular bowl A step is formed between the upstream side in the transport direction and the downstream side in the transport direction in the component transport path, and a step portion in which the component transport path on the downstream side in the transport direction is lowered is formed . A guide groove into which a projection projection of the projection nut fits is formed in the component conveyance path on the conveyance direction side, and an open part is formed for cutting off the outer wall plate and dropping the projection nut from the component conveyance path. A parts feeder for a projection nut, characterized in that an outer wall plate and a guide groove are overlapped on the downstream side of the projection nut.   2. The projection nut parts feeder according to claim 1, wherein a step dimension of the step part is 0.25 to 0.5 times a height dimension of a lateral side surface of the projection nut. It is intended to feed projection nuts whose side surfaces are flat and weld projections are formed at the four corners on the back side. Conveying arc-shaped parts along the outer wall plate of a substantially circular bowl A step is formed between the upstream side in the transport direction and the downstream side in the transport direction in the component transport path, and a step portion in which the component transport path on the downstream side in the transport direction is lowered is formed . A guide groove into which a projection projection of the projection nut fits is formed in the component conveyance path on the conveyance direction side, and an open part is formed for cutting off the outer wall plate and dropping the projection nut from the component conveyance path. the exterior panel and the guide grooves are not parts feeder to prepare for projection nut are overlapped downstream, lateral side of the first projection nut and second Puroji When at least two projection nuts that are in an adhesive state with an adhesive portion made of rust preventive oil pass through the stepped portion, the projection nut on the conveying direction side is inclined by its own weight, A separation method of a projection nut in a parts feeder for a projection nut, wherein a peeling phenomenon is caused in an adhesive part.

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