WO2008007593A1 - Screw fixing device and method of manufacturing screw fixing device - Google Patents

Screw fixing device and method of manufacturing screw fixing device Download PDF

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Publication number
WO2008007593A1
WO2008007593A1 PCT/JP2007/063399 JP2007063399W WO2008007593A1 WO 2008007593 A1 WO2008007593 A1 WO 2008007593A1 JP 2007063399 W JP2007063399 W JP 2007063399W WO 2008007593 A1 WO2008007593 A1 WO 2008007593A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
groove
hole
cylindrical
cylindrical body
Prior art date
Application number
PCT/JP2007/063399
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshihiro Miura
Original Assignee
Ochiai Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2007000753U external-priority patent/JP3131207U/en
Priority claimed from JP2007000752U external-priority patent/JP3131392U/en
Priority claimed from JP2007113483A external-priority patent/JP5019593B2/en
Application filed by Ochiai Co., Ltd. filed Critical Ochiai Co., Ltd.
Publication of WO2008007593A1 publication Critical patent/WO2008007593A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/02—Nuts or like thread-engaging members made of thin sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/206—Deep-drawing articles from a strip in several steps, the articles being coherent with the strip during the operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
    • F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
    • F16B37/068—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the support, e.g. the sheet or plate

Definitions

  • the present invention relates to a screw fixing tool for fixing a screw to a main body frame side, for example, when a circuit board is mounted on a main body frame of a liquid crystal television using a screw, and a method for manufacturing the same.
  • a circuit board has been mounted on a main body frame of a liquid crystal television using a fixing tool and a screw.
  • the fixing tool 40 has a screw groove 42 spirally cut from the upper surface at the center of the cylindrical portion 41 and a flange portion 43 having a diameter larger than that of the cylindrical portion 41 at the lower end.
  • a cutting groove 44 is formed around the end of the cylindrical portion 41 on the flange portion side by a cutting process.
  • the flange portion 43 of the fixture 40 is caulked 45 to a plurality of holes 51 formed in the main body frame 50, thereby fixing the fixture 40 to the main body frame 50.
  • the circuit board 60 is arranged on the upper surface side of the fixture 40, and the screw 70 is inserted into the hole 61 of the circuit board 60 and the screw groove 42 of the fixture 40. It was fixed to frame 50. Further, during the crimping process 45, the bulging part on the main body frame 50 side enters the cutting groove part 44 formed in the cylindrical part 41 so that the fixing is ensured.
  • the fixture 40 described above has a problem in that it takes time and effort to manufacture because each cylindrical portion 41 requires a thread groove 42 to be manually or threaded by a secondary cage. .
  • each cylindrical portion 41 requires a thread groove 42 to be manually or threaded by a secondary cage.
  • several of the manufactured fixtures are cut into the thread grooves 42 due to mishandling (forgetting threading). There was a case where things were not done.
  • the fixing tool 40 is caulked 45 to the main body frame 50, if the screw groove 42 is not cut into one of the fixing tools 40, the circuit board 60 can be mounted.
  • the integrated main body frame 50 was treated as a defective product.
  • the cutting groove portion 44 formed around the cylindrical portion 41 was formed by a cutting process, so the work was complicated. There is also a problem that it becomes a factor of high cost.
  • Patent Document 1 JP-A-10-285720
  • Patent Document 2 JP 09-137816
  • the present invention has been proposed in view of the above circumstances, and by performing a series of manufacturing processes including the formation of screw grooves in the screw fixture by a press process, the forgetting of thread cutting can be prevented and reliably performed.
  • a series of manufacturing processes including the formation of screw grooves in the screw fixture by a press process
  • the forgetting of thread cutting can be prevented and reliably performed.
  • the invention of claim 1 is a flange that can be fixed to the flat plate (main body frame 50) by being caulked 45 in a hole 51 formed in the flat plate (main body frame 50).
  • a screw fixing device 1 including a portion 13 and a cylindrical portion 10 which is continuous with the flange portion 13 and has a space portion 15 therein, and includes the following configuration.
  • a screw groove 20 for one round is formed on the top surface 11 that closes the non-flange portion of the cylindrical portion 10 by press-cage processing.
  • the invention of claim 2 is characterized in that, in the screw fixture of claim 1, a mountain shape 13a and a valley shape 13b in which irregularities are continuous are formed around the flange portion.
  • a third aspect of the invention is characterized in that, in the screw fixture of the first aspect, a groove portion 14 is formed at an end portion on the flange portion side of the cylindrical portion by press-cage processing.
  • a fourth aspect of the invention is characterized in that, in the screw fixture of the first aspect, a plurality of the groove portions 14 are formed, and the groove portions 14 are arranged at positions facing each other.
  • the invention of claim 5 is characterized in that, in the screw fixture of claim 1, a step is formed by providing a small diameter cylindrical portion having a diameter smaller than that of the cylindrical portion on the side opposite to the flange portion of the cylindrical portion.
  • the invention of claim 6 is a cylindrical shape having a flange portion 13 at one end and a thread groove 20 at the other end by press-carrying the belt-like plate 30 a plurality of times by the upper mold and the lower mold in a flow operation.
  • the cylindrical body is formed by a plurality of press forces so that one end is open and the other end has a top surface 11.
  • a hole 34 is formed in the top surface 11 of the cylindrical body by press working.
  • Thread groove machining process In this step, the screw groove 20 for one round provided with the step absorption hole 21 is formed on the top surface 11 in which the hole 34 is formed by a pressing force.
  • the vertical movement of the corresponding upper mold plate with respect to the predetermined lower mold plate is performed after the thread groove adding step in the method of manufacturing the screw fixture according to the sixth aspect.
  • a cam mechanism that converts the movement into a horizontal movement and facing it, and pressing from the horizontal direction facing the cylindrical body, a groove is formed on the side surface of the base of the cylindrical body by pressing. It is characterized by performing a groove processing step.
  • the invention method of claim 8 is characterized in that, in the groove processing step in the method of manufacturing a screw fixture of claim 7, two pairs of the cam mechanisms are arranged, and four grooves are simultaneously formed in the cylindrical body. .
  • the hole to be drilled in the top surface of the cylindrical body is formed by connecting a long hole portion to the circular portion.
  • This shape is a basic shape, and is asymmetrical in the vicinity of the connection between the circular portion and the long hole portion.
  • the thread groove into which the screw 70 is screwed is formed by pressing. Since the screw groove 20 for one round is formed, the entire manufacturing process can be performed by pressing, and the structure of the screw fixture 1 in which the screw groove 20 is reliably formed can be obtained.
  • the positioning screw fixing device 1 that facilitates alignment between the main body frame 50 and the circuit board 60 is provided.
  • the structure can be as follows.
  • the screw groove 20 into which the screw 70 is screwed is formed by one round of the screw groove 20 provided with the step absorption hole 21 by the press calo process, and the flange portion of the cylindrical portion 10 is formed. Since the plurality of groove portions 14 on the side end are formed by press processing, the entire manufacturing process can be performed by press processing, and the structure of the screw fixture 1 in which the screw groove 20 is reliably formed can be obtained. it can.
  • the holes that are drilled in the top surface of the cylindrical body by pressing are made asymmetrical, so that The screw groove 20 formed in the groove-caching process can be made into a screw groove having a larger number of parts in contact with the screw thread, and stability at the time of screw installation can be ensured.
  • the screw fixture 1 has a cylindrical portion 10 that is open on one side and closed on the other side by a top surface 11.
  • a flange portion 13 that protrudes around the outside of the cylindrical portion 10 is formed at the lower end on the opening side of the cylindrical portion 10.
  • groove portions 14 are formed at the flange portion 13 side end of the cylindrical portion 10 by press-cage processing.
  • the groove portions 14 are formed at equal intervals at positions facing each other in the cylindrical portion 10. Each of which constitutes an arcuate recess.
  • the groove portion 14 is used to make it difficult for the screw fixture 1 to come out of the member to be fixed in the force-caulking process described later.
  • the diameter of the flange portion 13 is slightly larger than the diameter of the hole in the main body frame on which the screw fixing tool 1 is mounted in order to perform the force-clamping process. The state in which the screw fixture 1 is attached to the main body frame by the caulking process will be described later.
  • a hole serving as a screw groove 20 for one round is formed by press-cage processing.
  • the thread groove 20 is attached to this portion with respect to a drilled hole (a hole 34 having the shape shown in FIGS. 2 and 3 described later). It is formed by deforming by press working into a shape that fits one screw thread (one round).
  • a step absorption hole 21 in the screw groove 20 (hole) a step corresponding to the screw thread can be formed in the screw groove 20 due to the presence of this portion! RU
  • the screw groove 20 has a step corresponding to one screw thread across the step absorption hole 21 and a spiral shape corresponding to one screw thread.
  • a space portion 15 in which the tip portion of the screw can be stored is formed inside the cylindrical portion 10.
  • the length of the cylindrical portion 10 is set according to the length of the screw fixed to the screw fixture 1 and the height required for the design.
  • the screw fixture 1 is a cylindrical body having a flange portion 13 at one end and a thread groove 20 at the other end by press-carrying the strip 30 in the vertical direction by the upper die and the lower die in a flow operation. And formed.
  • the series of steps shown in FIG. 2 is performed by bringing the upper and lower mold plates (not shown) arranged above and below the strip 30 made of metal pieces in synchronization with each other and moving toward and away from the strip 30.
  • Each process is performed simultaneously with each plate clamped by each plate, and each plate is separated after the process is completed, and the strip 30 is moved to the right in the drawing by a predetermined distance.
  • Each processing portion is sequentially moved to the next step.
  • a cylindrical body 31 having one end opened and a top surface on the other end is formed on the belt-like plate 30 by a plurality of press workings (sequential die processing) in FIGS. 2 (a) to 2 (d). 32, 33 are molded sequentially, Finally, a pressing process is performed so as to have the cylindrical portion 10 on which the top surface 11 is formed (main body forming step). In this process, a desired cylindrical body cannot be obtained by a single press process. Therefore, a cylindrical body having a cylindrical portion 10 having a desired shape can be formed by sequentially performing a plurality of press processes in a flow manner. (Fig. 2 (d)).
  • the top surface 11 of the molded cylindrical body is punched by a punching punch (not shown), and a long hole portion 34b is formed with respect to the substantially circular portion 34a as shown in FIG. Holes 34 are drilled (hole formation process) (Fig. 2 (e)).
  • the hole 34 is drilled in a shape such that the elongated hole 34b is connected to the substantially circular portion 34a.
  • the hole 34 is formed such that the radius R1 of the hole in the left part of the figure at the connecting part of the substantially circular part 34a and the long hole part 34b that is not symmetrical in the right and left in FIG. 3 is larger than the right radius R2.
  • the shape is asymmetrical in the vicinity of the connection between the substantially circular portion and the long hole portion. This is because, when a screw is mounted in a screw groove 21 formed by press processing, which will be described later, the screw groove portion is increased in contact with the screw thread, thereby increasing the stability of the screw mounting. This is to ensure.
  • the elongated hole portion 34b is deformed, so that the high and low positions of the thread groove 20 as shown in FIGS. 4 (a), (b), and (c) are obtained.
  • a step absorption hole 21 for interposing a space without a thread groove between them is formed, and the substantially circular portion 34a is deformed, whereby a spiral thread groove 20 having a height difference of one round is formed.
  • the left side of FIG. 4 is the beginning of the thread pitch and the right side is the end of the thread pitch, and the thread groove 20 having the step absorption hole 21 is formed by pressing force.
  • the end position of the right screw pitch is longer than that of the left side with respect to the bending position, so that the hole 34 is asymmetric in the state of FIG.
  • two pairs (four pieces) of groove portions 14 are formed on the base portion of the cylindrical body (on the belt-like plate 30 side) so as to face each other by pressing (FIG. 2 (g)).
  • the groove 14 is machined by incorporating a cam mechanism in the horizontal direction in the lower die, not in the normal vertical (upper / lower) press carriage, and also pressing the horizontal force (groove machining). Process).
  • Each of the cam mechanisms 100 includes a cam mechanism body 101 connected to the lower mold 110, a slide body 102 that moves within the cam mechanism body 101, and a slide body 102, as shown in FIGS.
  • the pressing plate 103 is fixed to the upper die 120, and the interlocking plate 125 is connected to the upper mold 120 and operates in the vertical direction.
  • a plate 121 is connected to the upper mold 120 through a buffering means 123 such as a panel so as to be movable together with the guide member 124, and a cylindrical portion 122 formed on the lower surface of the plate 121 and an upper surface of the plate 111 of the lower mold 110.
  • the cylindrical body 10 formed in the belt-like body 30 is sandwiched between the inner side surface and the outer side surface by the cylindrical groove portion 112 formed in the above.
  • One end side of the stop shaft 104 is fixed to the end surface of the slide plate 102, with the other end passing through the side portion of the cam mechanism body and facing the outside, and the side portion of the cam mechanism body and the head of the stop shaft 104 are fixed.
  • the panel 106 is pulled between the section 105 and the slide plate 102 is constantly urged outward (state shown in FIG. 7 (a)).
  • a rectangular protrusion 107 for forming the groove 14 with respect to the base of the cylindrical body 10 is formed.
  • the contact surface between the interlocking member 125 and the slide plate 102 is provided with an inclined surface 125a and an inclined surface 102a, respectively, and the vertical movement by the interlocking member 125 can be converted into a horizontal movement by sliding the inclined surfaces. (The state shown in Fig. 7 (b)).
  • the interlocking body 125 is a force that descends in conjunction with the plate 121 when the upper mold 120 descends in the vertical direction.
  • the cylindrical portion 122 of the plate 121 is inserted into the cylindrical body 10 of the strip 30. Later, the position of the interlocking member 125 and the plate 121, the buffer means 123, and the like are adjusted so that the lower inclined surface 125a operates so as to contact the inclined surface 102a of the slide body 102.
  • FIGS. 8 (a) and 8 (b) after the cylindrical portion 122 of the plate 121 is inserted into the cylindrical body 10 of the belt-like body 30, the slide body 103 is opposed to the pulling panel 106.
  • the rectangular protrusion 107 at the tip of the cylinder 10 abuts against the base of the cylindrical body 10 and presses while supporting the position of the inner surface with the cylindrical part 122 (FIG. 8 (b)).
  • the groove portion 14 can be formed with high accuracy without being deformed.
  • the production of the groove 14 in the cylindrical body 10 by the cam mechanism 100 having the above-described structure also applies a four-way force to the cylindrical body 10, so that the cylindrical body can be obtained by pressing the upper die 120 and the lower die 110 once.
  • Four grooves 14 can be formed on 10 base side surfaces.
  • the screw fixture 1 By cutting off the cylindrical body on which 0 is formed, the screw fixture 1 as a product is obtained.
  • the series of manufacturing processes including the formation of the thread groove 20 and the groove portion 14 are all performed by press processing (progressive die processing), so that forgetting to cut the thread is prevented and the thread cutting process is surely performed.
  • the groove 14 can be formed without performing complicated cutting, and the presence of the groove 14 can ensure a sufficient clamping strength (a screw having the screw groove 20 and the groove 14 formed only by pressing). Fixture 1) can be obtained.
  • the groove portion 14 is formed by pressing the cam mechanism 100 from four directions with respect to the cylindrical body 10, it is relatively small and the groove portion 14 is reliably engraved with a pressing force. It becomes possible to do.
  • the force is generated by operating the cam mechanism 100 from four directions on the cylindrical body 10 to perform pre-scaling.
  • the groove portion 14 is configured by pressing with a cam mechanism having only two opposing forces. You may do it.
  • the tip shape of the pressing plate 103 by setting the tip shape of the pressing plate 103 to a desired shape, for example, it is possible to form two groove portions 14 in which most of the cylindrical portion 10 is concave as shown in FIG.
  • the groove 14 of the cylindrical body 10 is On the surface, recesses are formed in portions other than the two surface portions 10a.
  • a plurality of groove portions are formed.
  • the groove portions may be formed by pressing so as to form concave portions over the entire circumference of the cylindrical portion.
  • the screw fixture 1 is for attaching the circuit board 60 to the main body frame 50 of a liquid crystal television or the like, and is used, for example, at a plurality of locations corresponding to four corners of the circuit board 60.
  • the screw fixing tool 1 is also inserted into the plurality of holes 51 formed in the main body frame 50, respectively, with the top surface 11 side force (Fig. 10 (a)). Since the diameter of the flange portion 13 of the screw fixture 1 is formed larger than the hole 51, the flange portion 13 comes into contact with the back surface of the main body frame 50. In this state, the flange 13 is pushed into the hole 51 by pressing the screw fixing tool 1 arranged on the backing plate 100 also with the side force of the main body frame 50, and the ridge 13a and valley around the flange 13. 13b is buried on the main body frame 50 side (Fig. 10 (b), Fig. Ll (a)).
  • the thickness of the plate of the main body frame 50 bulges 55 into the groove portion 14 and enters the groove portion 14, and is fixed to the main body frame 50 with screws so that the lower surface of the flange portion 13 is flush with the back surface of the main body frame 50. It is fixed by tool 1 force S caulking process 45 (Fig. 10 (c), Fig. 11 (b)).
  • the circuit board 60 is installed on the fixed screw fixture 1, the hole 61 provided in the circuit board 60 and the top surface 11 portion of the screw fixture 1 are aligned, and a screw 70 is interposed with a washer 80 interposed therebetween. Install. Since the hole 61 formed in the circuit board 60 is formed to be larger than the screw diameter of the screw 70, the thread of the screw 70 only fits into the screw groove 20 of the screw fixture 1, and the screw 70 is screwed. As a result, the fitting part (one valley) moves to the screw base side, and the screw 70 is fastened between the screw fixture 1 and the circuit board 60 (FIG. 10 (d)).
  • the screw fitting location is such that one trough portion 71 of the thread is located in the thread groove 20, and the screw thread top line below the trough portion 71 is in the thread groove 20.
  • the screw 70 is fixed to the screw fixture 1 by abutting along.
  • the screw groove 20 into which the screw 70 is screwed is formed into a series of pre-sets. Since the screw fixing device 1 in which the screw groove 20 is securely formed can be obtained, and the presence of the groove portion 14 can ensure sufficient force-tightening strength. As described in the conventional example, it is possible to prevent the generation of useless members that do not cause defective products when the screw fixture 1 is attached to the main body frame 50.
  • a step 18 is provided at the tip of the cylindrical portion 10 on the side opposite to the flange portion, and a small-diameter cylindrical portion 19 having a smaller diameter than the cylindrical portion 10 is formed by pressing. Has been.
  • the small diameter cylindrical portion 19 is configured to be blocked by the top surface 11.
  • the small-diameter cylindrical portion 19 is formed to facilitate the positioning of the circuit board with respect to the main body frame.
  • two groove portions 14 that are mostly concave like FIG. 9 may be formed. That is, the groove portion 14 of the cylindrical body 10 forms a recess in a portion other than the two surface portions 10 a on the surface of the cylindrical portion 10.
  • it may be formed by pressing so as to form a recess over the entire circumference of the cylindrical part instead of forming a plurality of grooves! / ⁇
  • the positioning screw fixture 1 having the above-described step is formed by a plurality of press carriages (progressive die force force) in FIGS. 14 (a) to 14 (d) in the main body forming step with respect to the belt-like plate 30.
  • press carriages progressive die force force
  • FIGS. 14 (a) to 14 (d) in the main body forming step with respect to the belt-like plate 30.
  • the screw fixture 1 is formed by pressing the belt-like plate 30 a plurality of times by a flow operation to form a cylindrical body having a flange portion 13 at one end and a thread groove 20 at the other end.
  • the plates (not shown) arranged above and below the belt-like plate 30 made of metal pieces are synchronized with each other so as to approach and separate from the belt-like plate 30.
  • Each step is performed simultaneously with the strip 30 clamped by each plate, and after completion of the steps, the plates are separated, and the strip 30 is moved to the right in the drawing by a predetermined distance. It is performed by sequentially moving to the process.
  • the screw fixing tool 1 is for mounting the circuit board 60 on the main body frame 50 of an LCD TV or the like.
  • the mounting of the screw fixing tool 1 on the main body frame 50 is a diagram illustrating the screw fixing tool of FIG. Performed in the same way as 10
  • the circuit board 60 is set on the screw fixture 1 fixed to the main body frame 50, and the screw 70 is attached (FIG. 15 (d)).
  • the screw 70 is inserted after aligning the hole of the circuit board 60 with the position of the top surface 11 portion of the screw fixture 1. Save time and effort.
  • the screw fixing tool 1 for positioning according to the present invention is used when the circuit board 60 is fixed to the main body frame 50 as shown in FIG.
  • the screw fixing tool IX for positioning of the present invention for the fixing point X located on the diagonal line (Fig. 15 (d)), and to other fixing points Y
  • the hole 61 drilled at the fixing point Y where the screw fixture 1Y without the step 18 is mounted is formed with a smaller diameter than the hole 62 drilled at the fixing point X.
  • the position of the circuit board 60 with respect to the main body frame 50 is easily determined by fitting the small-diameter cylindrical portion 19 of the fixture 1 into the hole 62, and the circuit board 60 is rotated by its rotation when the screw 70 is attached. Can be prevented from rotating.
  • the main body frame 50 and the circuit board 60 can be easily aligned due to the presence of the small-diameter cylindrical portion 19 that can be fitted into the hole 62 of the circuit board 60. it can.
  • the screw 70 force S and the screw groove 20 to be screwed are formed by a series of press processing. Therefore, it is possible to obtain the screw fixture 1 in which the screw groove 20 is securely formed. As described in the conventional example, the screw fixture 1 cannot be obtained when the screw fixture 1 is attached to the main body frame 50. A non-defective product is not generated, and generation of a wasted member can be prevented.
  • the groove 14 formed in the cylindrical portion 10 is also formed by pressing force, the groove 14 is provided in a series of pressing processes without performing complicated cutting that requires processing for each screw fixing tool. Can do.
  • FIG. 1 An embodiment of the screw fixing device of the present invention is shown, (a) is an explanatory plan view, (b) is an explanatory side view, and (c) is a cross-sectional view taken along line AA in the plan view. It is explanatory drawing.
  • FIG. 2 (a) to (i) are process explanatory views for explaining a manufacturing process of the screw fixture of FIG.
  • FIG. 3 is a plan view showing the shape of a hole drilled in the hole forming step in the manufacturing process of the screw fixture.
  • FIG. 4 (a), (b), and (c) show the thread grooves pressed in the thread groove machining process in the manufacturing process of the screw fixture.
  • (b) is an explanatory view taken along the arrow A
  • (c) is an explanatory view taken along the line BB of (b).
  • FIG. 5 is an explanatory plan view showing the positional relationship of the cam mechanism with respect to the strip in the manufacturing process of the screw fixture of the present invention.
  • FIG. 6 (a) and (b) are plan explanatory views showing the operating state of the cam mechanism, (a) showing the state before the horizontal operation, and (b) showing the state after the horizontal operation.
  • FIG. 7 (a) and (b) are side explanatory views showing the operating state of the cam mechanism. (A) shows the state before the horizontal operation, and (b) shows the state after the horizontal operation.
  • FIG. 8 (a) and (b) are enlarged cross-sectional explanatory views for explaining the engraved state of the belt-like body by the cam mechanism, (a) is a state before horizontal operation, and (b) is a state after horizontal operation. Indicates.
  • FIG. 9 shows another embodiment of the screw fixture according to the present invention.
  • (A) is an explanatory plan view
  • (b) is an explanatory side view
  • (c) is a sectional view taken along line AA in the plan view.
  • FIG. 11 (a) and (b) are partially enlarged cross-sectional explanatory views for explaining how to use the screw fixture of FIG. 1 or FIG.
  • FIG. 12 Another embodiment of the screw fixture of the present invention (for positioning) is shown.
  • A) is a plan view
  • (b) is a side view
  • (c) is a plan view of A— It is A line sectional explanatory drawing.
  • FIG. 13 shows another embodiment of the screw fixture of the present invention (for positioning), (a) is a plan view, (b) is a side view, and (c) is an A— It is A line sectional explanatory drawing.
  • FIG. 14 (a) to (i) are process explanatory views for explaining a manufacturing process of the screw fixture (for positioning) of FIG. 10 or FIG.
  • FIG. 15 (a) to (d) are cross-sectional explanatory views for explaining how to use the screw fixture (for positioning) of FIG. 10 or FIG.
  • FIG. 16 is an explanatory plan view showing a state where the circuit board is fixed to the main body frame.
  • FIG. 17 is a cross-sectional explanatory view showing a fixing structure when a screw fixing tool not for positioning is used.
  • FIG. 18 shows the structure of a conventional screw fixture, wherein (a) is an explanatory plan view, (b) is an explanatory side view, and (c) is an explanatory sectional view.
  • FIG. 19 is a cross-sectional explanatory view showing a fixed state between the main body frame and the circuit board using a conventional screw fixing tool.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Plates (AREA)

Abstract

A screw fixing device (1) has a flange part (13) capable of being fixed to a flat plate (body frame (50)) by staking (45) of the flange part to a hole (51) formed in the flat plate (body frame (50)), and also has a circular tube part (10) contiguous to the flange part (13) and having a space (15) in it. One turn of a screw groove (20) is formed by press working in that top face (11) of the circular tube part (10) that closes the tube part on the opposite side of the flange part. Thus, a series of manufacturing steps including the step of forming the screw groove can be performed by press working. The construction enables the series of steps, including the step of forming the screw groove, for manufacturing the screw fixing device to be performed by press working. This in turn prevents a worker from forgetting screw thread cutting to provide a product definitely provided with a screw thread.

Description

明 細 書  Specification
ねじ固定具及びねじ固定具の製造方法 技術分野  Technical field
[0001] 本発明は、例えば液晶テレビの本体フレームにねじを用いて回路基板を装着する に際して、本体フレーム側に対してねじを固定するためのねじ固定具及びその製造 方法に関する。  TECHNICAL FIELD [0001] The present invention relates to a screw fixing tool for fixing a screw to a main body frame side, for example, when a circuit board is mounted on a main body frame of a liquid crystal television using a screw, and a method for manufacturing the same.
背景技術  Background art
[0002] 従来、例えば液晶テレビの本体フレームに対しては、固定具及びねじを用いて回 路基板を装着することが行われて 、た。  Conventionally, for example, a circuit board has been mounted on a main body frame of a liquid crystal television using a fixing tool and a screw.
固定具 40は、図 18に示すように、円柱部 41の中央に上面よりねじ溝 42が螺旋状 に切られ、下端に円柱部 41より大径のフランジ部 43が形成されている。また、円柱部 41のフランジ部側の端部周囲には、切削加工処理により切削溝部 44が形成されて いる。  As shown in FIG. 18, the fixing tool 40 has a screw groove 42 spirally cut from the upper surface at the center of the cylindrical portion 41 and a flange portion 43 having a diameter larger than that of the cylindrical portion 41 at the lower end. In addition, a cutting groove 44 is formed around the end of the cylindrical portion 41 on the flange portion side by a cutting process.
[0003] そして、図 19に示すように、本体フレーム 50に形成された複数の穴 51に固定具 40 のフランジ部 43をかしめ処理 45することで、本体フレーム 50に対して固定具 40を固 定し一体化させた後、固定具 40の上面側に回路基板 60を配置し、回路基板 60の 孔 61及び固定具 40のねじ溝 42にねじ 70を挿入することで、回路基板 60を本体フレ ーム 50に対して固定することが行われていた。また、力しめ処理 45に際しては、本体 フレーム 50側の膨出部分が円柱部 41に形成された切削溝部 44に侵入して固定が 確実になるようになって 、る。  [0003] Then, as shown in FIG. 19, the flange portion 43 of the fixture 40 is caulked 45 to a plurality of holes 51 formed in the main body frame 50, thereby fixing the fixture 40 to the main body frame 50. After fixing and integrating, the circuit board 60 is arranged on the upper surface side of the fixture 40, and the screw 70 is inserted into the hole 61 of the circuit board 60 and the screw groove 42 of the fixture 40. It was fixed to frame 50. Further, during the crimping process 45, the bulging part on the main body frame 50 side enters the cutting groove part 44 formed in the cylindrical part 41 so that the fixing is ensured.
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0004] 上記した固定具 40は、各円柱部 41にそれぞれねじ溝 42を手作業や 2次カ卩ェによ るねじ切り作業が必要であるため、製造に手間が力かるという一面があった。また、大 量の固定具 40に対して一つずつねじ溝 42のねじ切り処理を必要とするため、製造し た多数の固定具の数個について、処理ミス（ねじ切り忘れ）によりねじ溝 42の切り込 みが施されな 、事態が生じる場合があった。 そして、本体フレーム 50に固定具 40をかしめ処理 45をした段階で、固定具 40の 一つにねじ溝 42が切り込まれていなカゝつたような場合、回路基板 60を装着すること ができず、一体ィ匕された本体フレーム 50ごと不良品扱いになるという不都合があった また、円柱部 41の周囲に形成される切削溝部 44は、切削加工処理により形成され るので、作業が煩雑になりコスト高の要因にもなるという問題点があった。 [0004] The fixture 40 described above has a problem in that it takes time and effort to manufacture because each cylindrical portion 41 requires a thread groove 42 to be manually or threaded by a secondary cage. . In addition, since it is necessary to thread the thread grooves 42 one by one for a large amount of fixtures 40, several of the manufactured fixtures are cut into the thread grooves 42 due to mishandling (forgetting threading). There was a case where things were not done. Then, when the fixing tool 40 is caulked 45 to the main body frame 50, if the screw groove 42 is not cut into one of the fixing tools 40, the circuit board 60 can be mounted. In addition, there was a problem that the integrated main body frame 50 was treated as a defective product. Also, the cutting groove portion 44 formed around the cylindrical portion 41 was formed by a cutting process, so the work was complicated. There is also a problem that it becomes a factor of high cost.
[0005] ねじを固定するための固定具については、下記特許文献に示されるように各種提 案されている力 本体フレーム 50に対して回路基板 60を固定するに適した構造は存 在しなかった。 [0005] As for the fixture for fixing the screw, there are no structures suitable for fixing the circuit board 60 to the main body frame 50 as shown in the following patent documents. It was.
特許文献 1 :特開平 10— 285720  Patent Document 1: JP-A-10-285720
特許文献 2：特開平 09 - 137816  Patent Document 2: JP 09-137816
[0006] 本発明は上記実情を考慮して提案されたもので、ねじ固定具においてねじ溝の形 成を含む一連の製造工程を全てプレス処理で行うことで、ねじ切り忘れを防止し、確 実にねじ切り加工がされている製品が得られるねじ固定具の構造、及び、ねじ固定 具の製造方法を提供することを目的として！ヽる。 [0006] The present invention has been proposed in view of the above circumstances, and by performing a series of manufacturing processes including the formation of screw grooves in the screw fixture by a press process, the forgetting of thread cutting can be prevented and reliably performed. For the purpose of providing a structure of a screw fixture that can produce a threaded product and a method of manufacturing the screw fixture! Speak.
課題を解決するための手段  Means for solving the problem
[0007] 上記目的を達成するため請求項 1の発明は、平板 (本体フレーム 50)に形成された 穴 51にかしめ処理 45されることで前記平板 (本体フレーム 50)に対して固定可能な フランジ部 13と、該フランジ部 13に連続し内部に空間部 15を存在させた円筒部 10 とを具備するねじ固定具 1であって、次の構成を含むことを特徴としている。 [0007] In order to achieve the above object, the invention of claim 1 is a flange that can be fixed to the flat plate (main body frame 50) by being caulked 45 in a hole 51 formed in the flat plate (main body frame 50). A screw fixing device 1 including a portion 13 and a cylindrical portion 10 which is continuous with the flange portion 13 and has a space portion 15 therein, and includes the following configuration.
前記円筒部 10の反フランジ部を塞ぐ頂面 11に、プレスカ卩ェ処理により一周分のね じ溝 20を形成する。  A screw groove 20 for one round is formed on the top surface 11 that closes the non-flange portion of the cylindrical portion 10 by press-cage processing.
[0008] 請求項 2の発明は、請求項 1のねじ固定具において、前記フランジ部周囲に凹凸が 連続する山状 13a及び谷状 13bを形成したことを特徴としている。  [0008] The invention of claim 2 is characterized in that, in the screw fixture of claim 1, a mountain shape 13a and a valley shape 13b in which irregularities are continuous are formed around the flange portion.
請求項 3の発明は、請求項 1のねじ固定具において、前記円筒部のフランジ部側の 端部に、プレスカ卩ェ処理により溝部 14を形成したことを特徴としている。  A third aspect of the invention is characterized in that, in the screw fixture of the first aspect, a groove portion 14 is formed at an end portion on the flange portion side of the cylindrical portion by press-cage processing.
請求項 4の発明は、請求項 1のねじ固定具において、前記溝部 14を複数形成し、 各溝部 14は、互いに対向する位置に配置されたことを特徴としている。 請求項 5の発明は、請求項 1のねじ固定具において、前記円筒部の反フランジ部 側に円筒部より直径が小さい小径円筒部を設けて段差を形成したことを特徴としてい る。 A fourth aspect of the invention is characterized in that, in the screw fixture of the first aspect, a plurality of the groove portions 14 are formed, and the groove portions 14 are arranged at positions facing each other. The invention of claim 5 is characterized in that, in the screw fixture of claim 1, a step is formed by providing a small diameter cylindrical portion having a diameter smaller than that of the cylindrical portion on the side opposite to the flange portion of the cylindrical portion.
[0009] 請求項 6の発明方法は、帯状板 30を流れ作業で前記上型及び下型による複数回 プレスカ卩ェすることで一端にフランジ部 13を他端にねじ溝 20を有する円筒状のねじ 固定具 1を製造する方法であって、次の各工程を含むことを特徴としている。  [0009] The invention of claim 6 is a cylindrical shape having a flange portion 13 at one end and a thread groove 20 at the other end by press-carrying the belt-like plate 30 a plurality of times by the upper mold and the lower mold in a flow operation. A method of manufacturing the screw fixture 1, which includes the following steps.
本体形成工程。この工程は、一端が開口し他端に頂面 11を有する円筒状となるよ うに複数回のプレス力卩ェで円筒体を形成するものである。  Body forming process. In this step, the cylindrical body is formed by a plurality of press forces so that one end is open and the other end has a top surface 11.
孔形成工程。この工程は、前記円筒体の頂面 11に穴 34をプレス加工で穿孔する ものである。  Hole formation process. In this step, a hole 34 is formed in the top surface 11 of the cylindrical body by press working.
ねじ溝加工工程。この工程は、穴 34が形成された頂面 11に段差吸収孔 21を備え た一周分のねじ溝 20をプレス力卩ェで形成するものである。  Thread groove machining process. In this step, the screw groove 20 for one round provided with the step absorption hole 21 is formed on the top surface 11 in which the hole 34 is formed by a pressing force.
切り落し加工工程。この工程は、前記帯状板カゝらねじ溝が形成された円筒体を周 囲にフランジ部 13を有するように切り落してねじ固定具を得るものである。  Cutting process. In this step, the cylindrical body on which the thread groove is formed is cut off so as to have the flange portion 13 around it to obtain a screw fixture.
請求項 7の発明方法は、請求項 6のねじ固定具の製造方法における前記ねじ溝加 ェ工程の後に、所定の下型のプレートに対して、対応する上型のプレートの鉛直方 向の動きを水平方向の動きに変換して対向動作するカム機構を組み込んで、前記円 筒体に対して対向する水平方向からプレス加工することにより、前記円筒体の基部 側面にプレス加工処理により溝部を形成する溝部加工工程を行うことを特徴としてい る。  According to the seventh aspect of the present invention, the vertical movement of the corresponding upper mold plate with respect to the predetermined lower mold plate is performed after the thread groove adding step in the method of manufacturing the screw fixture according to the sixth aspect. By incorporating a cam mechanism that converts the movement into a horizontal movement and facing it, and pressing from the horizontal direction facing the cylindrical body, a groove is formed on the side surface of the base of the cylindrical body by pressing. It is characterized by performing a groove processing step.
請求項 8の発明方法は、請求項 7のねじ固定具の製造方法における前記溝部加工 工程において、前記カム機構を二対配置し、円筒体に四箇所の溝部を同時に形成 することを特徴としている。  The invention method of claim 8 is characterized in that, in the groove processing step in the method of manufacturing a screw fixture of claim 7, two pairs of the cam mechanisms are arranged, and four grooves are simultaneously formed in the cylindrical body. .
請求項 9の発明方法は、請求項 6のねじ固定具の製造方法の孔形成工程にぉ 、て 、前記円筒体の頂面にプレス加工で穿孔する穴は、円形部に長孔部を連結した形 状を基本形状とし、前記円形部と長孔部との連結付近において左右非対称の形状 であることを特徴として 、る。  According to the ninth aspect of the present invention, in the hole forming step of the method of manufacturing the screw fixture according to the sixth aspect, the hole to be drilled in the top surface of the cylindrical body is formed by connecting a long hole portion to the circular portion. This shape is a basic shape, and is asymmetrical in the vicinity of the connection between the circular portion and the long hole portion.
[0010] 本発明のねじ固定具 1によれば、ねじ 70が螺着するねじ溝をプレス加工処理による 一周分のねじ溝 20で形成するので、一連の製造工程を全てプレス処理で行うことが でき、ねじ溝 20が確実に形成されるねじ固定具 1の構造とすることができる。 [0010] According to the screw fixture 1 of the present invention, the thread groove into which the screw 70 is screwed is formed by pressing. Since the screw groove 20 for one round is formed, the entire manufacturing process can be performed by pressing, and the structure of the screw fixture 1 in which the screw groove 20 is reliably formed can be obtained.
また、ねじ固定具 1において、回路基板 60の孔 62に嵌合可能な小径円筒部 19を 設けることで、本体フレーム 50と回路基板 60との位置合わせが容易となる位置決め 用のねじ固定具 1の構造とすることができる。  In addition, in the screw fixing device 1, by providing a small-diameter cylindrical portion 19 that can be fitted into the hole 62 of the circuit board 60, the positioning screw fixing device 1 that facilitates alignment between the main body frame 50 and the circuit board 60 is provided. The structure can be as follows.
本発明のねじ固定具製造方法によれば、ねじ 70が螺着するねじ溝 20をプレスカロ ェ処理による段差吸収孔 21を備えた一周分のねじ溝 20で形成し、円筒部 10のフラ ンジ部側端の複数の溝部 14をプレス加工処理により形成するので、一連の製造ェ 程を全てプレス処理で行うことができ、ねじ溝 20が確実に形成されるねじ固定具 1の 構造とすることができる。  According to the screw fixing device manufacturing method of the present invention, the screw groove 20 into which the screw 70 is screwed is formed by one round of the screw groove 20 provided with the step absorption hole 21 by the press calo process, and the flange portion of the cylindrical portion 10 is formed. Since the plurality of groove portions 14 on the side end are formed by press processing, the entire manufacturing process can be performed by press processing, and the structure of the screw fixture 1 in which the screw groove 20 is reliably formed can be obtained. it can.
また、円筒部 10のフランジ部側端の複数の溝部 14をプレス加工処理により形成す るので、溝部 14の存在により十分な力しめ強度が確保できるねじ固定具 1の構造と することができる。  In addition, since the plurality of groove portions 14 at the flange portion side end of the cylindrical portion 10 are formed by press working, the structure of the screw fixture 1 that can secure a sufficient clamping strength due to the presence of the groove portions 14 can be obtained.
また、ねじ固定具を製造する場合に、円筒体の頂面にプレス加工で穿孔する穴（円 形部に長孔部を連結した形状）について、左右非対称の形状とすることで、その後の ねじ溝カ卩ェ工程で形成するねじ溝 20につ 、て、ねじ山に接して 、る部分を多くした ねじ溝とすることができ、ねじ装着時の安定性を確保することができる。  In addition, when manufacturing a screw fixture, the holes that are drilled in the top surface of the cylindrical body by pressing (a shape in which a long hole is connected to a circular part) are made asymmetrical, so that The screw groove 20 formed in the groove-caching process can be made into a screw groove having a larger number of parts in contact with the screw thread, and stability at the time of screw installation can be ensured.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0011] 本発明の実施の形態の一例について、図面を参照しながら説明する。  [0011] An example of an embodiment of the present invention will be described with reference to the drawings.
本発明によるねじ固定具 1は、図 1に示されるように、一方側が開口し、他方側が頂 面 11によって塞がれた円筒部 10を有して構成されている。円筒部 10の開口側下端 には、円筒部 10の外側周囲に突出するフランジ部 13が形成されて 、る。  As shown in FIG. 1, the screw fixture 1 according to the present invention has a cylindrical portion 10 that is open on one side and closed on the other side by a top surface 11. A flange portion 13 that protrudes around the outside of the cylindrical portion 10 is formed at the lower end on the opening side of the cylindrical portion 10.
[0012] フランジ部 13の周囲面は、山状 13aと谷状 13bから成る凹凸が連続形成されてい る。これはフランジ部 13が平面板の穴に力しめ処理される際に、穴の内壁部を凹凸 により変形し易くするためであり、また、ねじ締め時の供回りの防止（回転防止）を図る ためである。  [0012] On the peripheral surface of the flange portion 13, irregularities including a mountain shape 13a and a valley shape 13b are continuously formed. This is to make it easier to deform the inner wall of the hole due to unevenness when the flange 13 is pressed into the hole in the flat plate, and to prevent rotation during rotation (prevent rotation). Because.
[0013] また、円筒部 10のフランジ部 13側端に、プレスカ卩ェ処理により 4個の溝部 14が形 成されている。各溝部 14は、円筒部 10における互いに対向する位置に等間隔に形 成され、それぞれが弓状の凹部を構成している。この溝部 14は、後述する力しめ処 理において、ねじ固定具 1が被固定部材カも抜け難くするためのものである。 [0013] Further, four groove portions 14 are formed at the flange portion 13 side end of the cylindrical portion 10 by press-cage processing. The groove portions 14 are formed at equal intervals at positions facing each other in the cylindrical portion 10. Each of which constitutes an arcuate recess. The groove portion 14 is used to make it difficult for the screw fixture 1 to come out of the member to be fixed in the force-caulking process described later.
フランジ部 13の直径は、力しめ処理を行うため、ねじ固定具 1が装着される本体フ レームの穴の径より若干大きな径となっている。本体フレームにねじ固定具 1がかし め処理により装着された状態については後述する。  The diameter of the flange portion 13 is slightly larger than the diameter of the hole in the main body frame on which the screw fixing tool 1 is mounted in order to perform the force-clamping process. The state in which the screw fixture 1 is attached to the main body frame by the caulking process will be described later.
[0014] 円筒部 10の頂面 11には、プレスカ卩ェ処理により一周分のねじ溝 20となる孔が形 成されている。このねじ溝 20は、図 1 (a) (c)に示すように、穿孔された穴（後述する 図 2及び図 3に示された形状の穴 34)に対して、この部分に装着されるねじのねじ山 一つ分 (一周分）に対応して嵌合する形状にプレス加工処理で変形することにより形 成するものである。ねじ溝 20 (孔）には、段差吸収孔 21を設けることで、この部分の存 在によりねじ溝 20にねじ山に対応する段差が形成できるように構成されて！、る。 すなわち、ねじ溝 20は、段差吸収孔 21を隔ててねじの一山に対応する段差を有す るとともに、ねじの一山に対応する螺旋形状を有して構成されて ヽる。  [0014] On the top surface 11 of the cylindrical portion 10, a hole serving as a screw groove 20 for one round is formed by press-cage processing. As shown in FIGS. 1 (a) and 1 (c), the thread groove 20 is attached to this portion with respect to a drilled hole (a hole 34 having the shape shown in FIGS. 2 and 3 described later). It is formed by deforming by press working into a shape that fits one screw thread (one round). By providing a step absorption hole 21 in the screw groove 20 (hole), a step corresponding to the screw thread can be formed in the screw groove 20 due to the presence of this portion! RU In other words, the screw groove 20 has a step corresponding to one screw thread across the step absorption hole 21 and a spiral shape corresponding to one screw thread.
[0015] また、円筒部 10の内部には、ねじの先端部分が収納可能な空間部 15が形成され ている。円筒部 10の長さは、ねじ固定具 1に固定されるねじの長さや設計上必要な 高さに応じて設定される。  In addition, a space portion 15 in which the tip portion of the screw can be stored is formed inside the cylindrical portion 10. The length of the cylindrical portion 10 is set according to the length of the screw fixed to the screw fixture 1 and the height required for the design.
[0016] 次に、上記構造のねじ固定具 1の基本的な製造方法について、図 2乃至図 8を参 照しながら説明する。  Next, a basic manufacturing method of the screw fixture 1 having the above structure will be described with reference to FIGS.
ねじ固定具 1は、帯状板 30を流れ作業で上型及び下型による垂直方向の複数回 プレスカ卩ェすることで、一端にフランジ部 13を有し、他端にねじ溝 20を有する円筒体 とすることで形成される。  The screw fixture 1 is a cylindrical body having a flange portion 13 at one end and a thread groove 20 at the other end by press-carrying the strip 30 in the vertical direction by the upper die and the lower die in a flow operation. And formed.
図 2に示す一連の工程は、金属片から構成される帯状板 30の上下に配置された上 型及び下型の各プレート（図示せず)を同期させて帯状板 30に対して近接 ·離隔す るようにし、各プレートによって帯状板 30をクランプした状態において各工程を同時 に実施し、工程終了後各プレ—トを離隔させ、帯状板 30を所定の距離だけ図面右方 向へ移動させ、各加工部分を次の工程へ順次移動させて行われる。  The series of steps shown in FIG. 2 is performed by bringing the upper and lower mold plates (not shown) arranged above and below the strip 30 made of metal pieces in synchronization with each other and moving toward and away from the strip 30. Each process is performed simultaneously with each plate clamped by each plate, and each plate is separated after the process is completed, and the strip 30 is moved to the right in the drawing by a predetermined distance. Each processing portion is sequentially moved to the next step.
[0017] 先ず、帯状板 30に対して、図 2 (a)〜（d)における複数回のプレス加工 (順送金型 加工）により、一端が開口し他端に頂面を有する円筒体 31, 32, 33を順次成型し、 最終的には頂面 11が形成された円筒部 10を有するようにプレス処理が施される (本 体形成工程)。この処理は、 1回のプレス処理で所望の円筒体を得ることができない ため、複数回のプレス加工を順次流れ作業的に行うことで、所望形状の円筒部 10を 有する円筒体を形成することが可能となる（図 2 (d) )。 First, a cylindrical body 31 having one end opened and a top surface on the other end is formed on the belt-like plate 30 by a plurality of press workings (sequential die processing) in FIGS. 2 (a) to 2 (d). 32, 33 are molded sequentially, Finally, a pressing process is performed so as to have the cylindrical portion 10 on which the top surface 11 is formed (main body forming step). In this process, a desired cylindrical body cannot be obtained by a single press process. Therefore, a cylindrical body having a cylindrical portion 10 having a desired shape can be formed by sequentially performing a plurality of press processes in a flow manner. (Fig. 2 (d)).
[0018] 次に、成型された円筒体の頂面 11に、穴開けパンチ（図示せず）によって打ち抜く プレスカ卩ェにより、図 3に示されるような略円形部 34aに対して長孔部 34bが連結され たような形状の穴 34を穿孔する（孔形成工程）（図 2 (e) )。  [0018] Next, the top surface 11 of the molded cylindrical body is punched by a punching punch (not shown), and a long hole portion 34b is formed with respect to the substantially circular portion 34a as shown in FIG. Holes 34 are drilled (hole formation process) (Fig. 2 (e)).
穴 34は、図 3に示されるように、略円形部 34aに対して長孔部 34bが連結されたよう な形状に穿孔されている。穴 34は、図 3の左右において対称形状ではなぐ略円形 部 34aと長孔部 34bとの連結部分における図の左側部分の穴の半径 R1が右側の半 径 R2より大きくなるように形成されることで、略円形部と長孔部との連結付近におい て左右非対称の形状となっている。これは、後述するプレス加工で形成されたねじ溝 21にねじを装着した場合に、ねじ山に接して 、る（支えて 、る）ねじ溝部分を多くする ことで、ねじ装着の安定性を確保するためである。  As shown in FIG. 3, the hole 34 is drilled in a shape such that the elongated hole 34b is connected to the substantially circular portion 34a. The hole 34 is formed such that the radius R1 of the hole in the left part of the figure at the connecting part of the substantially circular part 34a and the long hole part 34b that is not symmetrical in the right and left in FIG. 3 is larger than the right radius R2. Thus, the shape is asymmetrical in the vicinity of the connection between the substantially circular portion and the long hole portion. This is because, when a screw is mounted in a screw groove 21 formed by press processing, which will be described later, the screw groove portion is increased in contact with the screw thread, thereby increasing the stability of the screw mounting. This is to ensure.
[0019] 続いて、穴 34を含む頂面 11に対してプレス力卩ェを行うことにより、穴 34を変形させ 、図 4に示されるように、前記略円形部 34aを変形したねじ溝 20及び長孔部 34bを変 形した段差吸収孔 21を形成することで一周分のねじ溝 20を構成する（ねじ溝加工ェ 程）（図 2 (f) )。  [0019] Subsequently, by applying a pressing force to the top surface 11 including the hole 34, the hole 34 is deformed, and the substantially circular portion 34a is deformed as shown in FIG. Further, by forming the step absorption hole 21 in which the long hole portion 34b is deformed, the screw groove 20 for one round is formed (screw groove processing step) (FIG. 2 (f)).
すなわち、ねじ溝カ卩ェ工程においては、長孔部 34bが変形されることで、図 4 (a) (b ) (c)に示されるような、ねじ溝 20の高い位置と低い位置との間にねじ溝がない空間 を介在させるための段差吸収孔 21が形成され、略円形部 34aが変形されることで、 一周分の高低差を有する螺旋形状のねじ溝 20が形成される。  That is, in the thread groove caching step, the elongated hole portion 34b is deformed, so that the high and low positions of the thread groove 20 as shown in FIGS. 4 (a), (b), and (c) are obtained. A step absorption hole 21 for interposing a space without a thread groove between them is formed, and the substantially circular portion 34a is deformed, whereby a spiral thread groove 20 having a height difference of one round is formed.
また、ねじ溝 20においては、図 4の左側がねじピッチの始まりとなり、右側がねじピ ツチの終わりとなるようにし、プレス力卩ェで段差吸収孔 21を有するねじ溝 20が形成さ れた場合、ねじ山に接している（支えている）ねじ溝部分を多くするとともに、右側の ねじピッチの終わり側を高く曲げる（図 4 (c) )必要がある。そのため、右側のねじピッ チの終わり位置は、曲げ位置に対して左側のそれよりも長くなるようにするため、プレ スカロェ前の図 3の状態では穴 34は非対称となっている。 次に、円筒体の基部（帯状板 30側）に、プレス加工処理によりそれぞれ対向するよ うに配置された二対（四個）の溝部 14を形成する（図 2 (g) )。この溝部 14の加工は、 通常の垂直方向（上型 ·下型）によるプレスカ卩ェではなぐ下型にカム機構を水平方 向に組み込んで、水平方向力もプレスカ卩ェすることで行う（溝部加工工程)。 In addition, in the thread groove 20, the left side of FIG. 4 is the beginning of the thread pitch and the right side is the end of the thread pitch, and the thread groove 20 having the step absorption hole 21 is formed by pressing force. In this case, it is necessary to increase the number of thread grooves that are in contact with (support) the thread and bend the end side of the right screw pitch high (Figure 4 (c)). Therefore, the end position of the right screw pitch is longer than that of the left side with respect to the bending position, so that the hole 34 is asymmetric in the state of FIG. Next, two pairs (four pieces) of groove portions 14 are formed on the base portion of the cylindrical body (on the belt-like plate 30 side) so as to face each other by pressing (FIG. 2 (g)). The groove 14 is machined by incorporating a cam mechanism in the horizontal direction in the lower die, not in the normal vertical (upper / lower) press carriage, and also pressing the horizontal force (groove machining). Process).
[0020] すなわち、図 5に示すように、矢印の方向に帯状体 30が移動する場合に、図 2 (g) の加工を行う下型 110の所定のプレート 111に対して、 4つの押圧板 103が円筒体 1 0に対して水平方向から動作する二対のカム機構 100が配設されて ヽる。この二対の カム機構 100による水平動作の方向は、帯状体 30の移動方向に対してそれぞれ 45 度傾斜し、水平動作同士は直角に交差するように配置されて 、る。  That is, as shown in FIG. 5, when the strip 30 moves in the direction of the arrow, four pressing plates are used against the predetermined plate 111 of the lower mold 110 that performs the processing of FIG. 2 (g). Two pairs of cam mechanisms 100 in which 103 moves from the horizontal direction with respect to the cylindrical body 10 are disposed. The direction of horizontal movement by the two pairs of cam mechanisms 100 is inclined by 45 degrees with respect to the moving direction of the strip 30, and the horizontal movements are arranged so as to intersect at right angles.
[0021] 各カム機構 100は、図 5〜図 7に示すように、下型 110に連結されたカム機構本体 1 01と、カム機構本体 101内を移動するスライド体 102と、スライド体 102に対して固定 された押圧板 103と、上型 120に連結されて鉛直方向に動作する連動板 125を具備 して構成されている。  Each of the cam mechanisms 100 includes a cam mechanism body 101 connected to the lower mold 110, a slide body 102 that moves within the cam mechanism body 101, and a slide body 102, as shown in FIGS. The pressing plate 103 is fixed to the upper die 120, and the interlocking plate 125 is connected to the upper mold 120 and operates in the vertical direction.
上型 120にはパネ等の緩衝手段 123を介してプレート 121がガイド部材 124ととも に移動可能に連結され、プレート 121の下面に形成された円柱部 122と、下型 110 のプレート 111の上面に形成された円柱溝部 112とにより、帯状体 30に形成された 円筒体 10を内側面及び外側面で挟むようになって 、る。  A plate 121 is connected to the upper mold 120 through a buffering means 123 such as a panel so as to be movable together with the guide member 124, and a cylindrical portion 122 formed on the lower surface of the plate 121 and an upper surface of the plate 111 of the lower mold 110. The cylindrical body 10 formed in the belt-like body 30 is sandwiched between the inner side surface and the outer side surface by the cylindrical groove portion 112 formed in the above.
[0022] スライド板 102の端面には、他端側がカム機構本体の側部を貫通して外部に臨ま せた止め軸 104の一端側が固定され、カム機構本体の側部と止め軸 104の頭部 10 5との間にひっぱりパネ 106が装着されることで、スライド板 102を常時外側に付勢す る（図 7 (a)の状態)ように構成されて 、る。 [0022] One end side of the stop shaft 104 is fixed to the end surface of the slide plate 102, with the other end passing through the side portion of the cam mechanism body and facing the outside, and the side portion of the cam mechanism body and the head of the stop shaft 104 are fixed. The panel 106 is pulled between the section 105 and the slide plate 102 is constantly urged outward (state shown in FIG. 7 (a)).
押圧板 103の先端には、円筒体 10の基部に対して溝部 14を刻設するための方形 突出部 107が形成されている。  At the tip of the pressing plate 103, a rectangular protrusion 107 for forming the groove 14 with respect to the base of the cylindrical body 10 is formed.
連動体 125とスライド板 102との接触面はそれぞれ傾斜面 125a、傾斜面 102aが 設けられ、連動体 125による鉛直方向の移動が傾斜面同士が摺動することで水平方 向の移動に変換できる（図 7 (b)の状態)ように構成されて 、る。  The contact surface between the interlocking member 125 and the slide plate 102 is provided with an inclined surface 125a and an inclined surface 102a, respectively, and the vertical movement by the interlocking member 125 can be converted into a horizontal movement by sliding the inclined surfaces. (The state shown in Fig. 7 (b)).
また、連動体 125は、上型 120が鉛直方向に降下する場合に、プレート 121に連動 して降下する力 プレート 121の円柱部 122が帯状体 30の円筒体 10に挿入された 後に、その下端傾斜面 125aがスライド体 102の傾斜面 102aに当接するよう動作す るように、連動体 125及びプレート 121の位置や緩衝手段 123等を調整している。 In addition, the interlocking body 125 is a force that descends in conjunction with the plate 121 when the upper mold 120 descends in the vertical direction. The cylindrical portion 122 of the plate 121 is inserted into the cylindrical body 10 of the strip 30. Later, the position of the interlocking member 125 and the plate 121, the buffer means 123, and the like are adjusted so that the lower inclined surface 125a operates so as to contact the inclined surface 102a of the slide body 102.
[0023] したがって、図 8 (a) (b)に示すように、プレート 121の円柱部 122が帯状体 30の円 筒体 10に挿入された後に、ひっぱりパネ 106に抗してスライド体 103が移動し、その 先端の方形突出部 107が円筒体 10の基部に当接し、内側面の位置を円柱部 122で 支持しながら押圧するので（図 8 (b) )、円筒体 10が押圧力により変形することなぐ高 精度に溝部 14を形成することができる。 Therefore, as shown in FIGS. 8 (a) and 8 (b), after the cylindrical portion 122 of the plate 121 is inserted into the cylindrical body 10 of the belt-like body 30, the slide body 103 is opposed to the pulling panel 106. The rectangular protrusion 107 at the tip of the cylinder 10 abuts against the base of the cylindrical body 10 and presses while supporting the position of the inner surface with the cylindrical part 122 (FIG. 8 (b)). The groove portion 14 can be formed with high accuracy without being deformed.
上記構造のカム機構 100による円筒体 10への溝 14の製作は、円筒体 10に対して 四方向力も行われるので、上型 120及び下型 110による 1回のプレス加工で円筒体 The production of the groove 14 in the cylindrical body 10 by the cam mechanism 100 having the above-described structure also applies a four-way force to the cylindrical body 10, so that the cylindrical body can be obtained by pressing the upper die 120 and the lower die 110 once.
10の基部側面に四つの溝部 14を形成できる。 Four grooves 14 can be formed on 10 base side surfaces.
[0024] そして、円筒体の周囲にフランジ部 13の外周となる凹凸が繰り返される切り込み溝 をプレス加工により形成する（図 2 (h) )。 [0024] Then, a cut groove in which irregularities serving as the outer periphery of the flange portion 13 are repeated is formed around the cylindrical body by pressing (FIG. 2 (h)).
最後に、穴開けパンチ（図示せず）によって打ち抜くことで、帯状板 30からねじ溝 2 Finally, by punching with a punch (not shown), the strip 30 is threaded 2
0が形成された円筒体を切り落すことで、製品としてのねじ固定具 1を得るものであるBy cutting off the cylindrical body on which 0 is formed, the screw fixture 1 as a product is obtained.
(図 2 (i) )。 (Fig. 2 (i)).
[0025] 上記した一連の製造工程は、ねじ溝 20及び溝部 14の形成を含む一連の製造工程 を全てプレス処理 (順送金型加工)で行われるので、ねじ切り忘れを防止し、確実に ねじ切り加工がされ、且つ、煩雑な切削加工を行うことなく溝部 14が形成でき、この 溝部 14の存在により十分な力しめ強度が確保できる製品（プレス処理のみでねじ溝 20及び溝部 14が形成されたねじ固定具 1)を得ることができる。  [0025] In the series of manufacturing processes described above, the series of manufacturing processes including the formation of the thread groove 20 and the groove portion 14 are all performed by press processing (progressive die processing), so that forgetting to cut the thread is prevented and the thread cutting process is surely performed. In addition, the groove 14 can be formed without performing complicated cutting, and the presence of the groove 14 can ensure a sufficient clamping strength (a screw having the screw groove 20 and the groove 14 formed only by pressing). Fixture 1) can be obtained.
また、上記した製造方法によれば、円筒体 10に対して四方向からカム機構 100を 動作させるプレス加工で溝部 14を形成するので、比較的小さ 、プレス力で確実に溝 部 14を刻設することが可能となる。  Further, according to the manufacturing method described above, since the groove portion 14 is formed by pressing the cam mechanism 100 from four directions with respect to the cylindrical body 10, it is relatively small and the groove portion 14 is reliably engraved with a pressing force. It becomes possible to do.
[0026] 上記製造方法では、円筒体 10に対して四方向からカム機構 100を動作させてプレ スカロェを行うようにした力 対向する二方向のみ力ものカム機構によるプレスにより溝 部 14を構成するようにしてもよい。この場合、押圧板 103の先端形状を所望の形状と することにより、例えば図 9に示すような円筒部 10の大部分が凹状となる二個の溝部 14を形成することも可能となる。この例の場合、円筒体 10の溝部 14は、円筒部 10の 表面において、二個の表面部 10a以外の部分に凹部を構成するようにしている。 また、各例では溝部を複数個形成するようにしたが、円筒部の全周に亘つて凹部と なるようにプレス加工で形成されるものであってもよ 、。 [0026] In the manufacturing method described above, the force is generated by operating the cam mechanism 100 from four directions on the cylindrical body 10 to perform pre-scaling. The groove portion 14 is configured by pressing with a cam mechanism having only two opposing forces. You may do it. In this case, by setting the tip shape of the pressing plate 103 to a desired shape, for example, it is possible to form two groove portions 14 in which most of the cylindrical portion 10 is concave as shown in FIG. In this example, the groove 14 of the cylindrical body 10 is On the surface, recesses are formed in portions other than the two surface portions 10a. In each example, a plurality of groove portions are formed. However, the groove portions may be formed by pressing so as to form concave portions over the entire circumference of the cylindrical portion.
図 9のねじ固定具の他の部分については、図 1のねじ固定具と同じ構成であるので The other parts of the screw fixture in Fig. 9 have the same configuration as the screw fixture in Fig. 1.
、同一符号を付して説明を省略する。 The same reference numerals are assigned and the description is omitted.
[0027] 続いて、上記したねじ固定具 1の使用の仕方について、図 10及び図 11を参照しな がら説明する。 Next, how to use the above-described screw fixture 1 will be described with reference to FIG. 10 and FIG.
ねじ固定具 1は、液晶テレビ等の本体フレーム 50に回路基板 60を装着するための ものであり、例えば回路基板 60の四隅等に対応する複数個所に用いられる。  The screw fixture 1 is for attaching the circuit board 60 to the main body frame 50 of a liquid crystal television or the like, and is used, for example, at a plurality of locations corresponding to four corners of the circuit board 60.
[0028] 先ず、本体フレーム 50に形成された複数の穴 51に、それぞれねじ固定具 1をその 頂面 11側力も挿入する（図 10 (a) )。ねじ固定具 1のフランジ部 13の直径は穴 51より 大きく形成されているので、フランジ部 13が本体フレーム 50の裏面に当接する。 この状態で、当て板 100に配置されたねじ固定具 1を本体フレーム 50側力も押し付 けることで、フランジ部 13が穴 51へ押し込まれ、フランジ部 13の周囲の山状 13a及 び谷状 13bが本体フレーム 50側に埋没される（図 10 (b)、図 l l (a) )。この時、本体 フレーム 50の板の肉厚が溝部 14に膨出 55して入り込み、フランジ部 13の下面が本 体フレーム 50の裏面と同一平面となるように、本体フレーム 50に対してねじ固定具 1 力 Sかしめ処理 45により固定される（図 10 (c)、図 11 (b) )。  [0028] First, the screw fixing tool 1 is also inserted into the plurality of holes 51 formed in the main body frame 50, respectively, with the top surface 11 side force (Fig. 10 (a)). Since the diameter of the flange portion 13 of the screw fixture 1 is formed larger than the hole 51, the flange portion 13 comes into contact with the back surface of the main body frame 50. In this state, the flange 13 is pushed into the hole 51 by pressing the screw fixing tool 1 arranged on the backing plate 100 also with the side force of the main body frame 50, and the ridge 13a and valley around the flange 13. 13b is buried on the main body frame 50 side (Fig. 10 (b), Fig. Ll (a)). At this time, the thickness of the plate of the main body frame 50 bulges 55 into the groove portion 14 and enters the groove portion 14, and is fixed to the main body frame 50 with screws so that the lower surface of the flange portion 13 is flush with the back surface of the main body frame 50. It is fixed by tool 1 force S caulking process 45 (Fig. 10 (c), Fig. 11 (b)).
[0029] 固定されたねじ固定具 1上に回路基板 60を設置し、回路基板 60に設けられた孔 6 1とねじ固定具 1の頂面 11部分を合わせ、ワッシャー 80を介在させてねじ 70を装着 する。回路基板 60に形成された孔 61は、ねじ 70のねじ径より大きく形成されている ので、ねじ 70のねじ山は、ねじ固定具 1のねじ溝 20にのみ嵌合し、ねじ 70を螺進さ せることで嵌合箇所 (一つの谷部）がねじ根元側に移動し、ねじ固定具 1と回路基板 60との間でねじ 70が締結される（図 10 (d) )。  [0029] The circuit board 60 is installed on the fixed screw fixture 1, the hole 61 provided in the circuit board 60 and the top surface 11 portion of the screw fixture 1 are aligned, and a screw 70 is interposed with a washer 80 interposed therebetween. Install. Since the hole 61 formed in the circuit board 60 is formed to be larger than the screw diameter of the screw 70, the thread of the screw 70 only fits into the screw groove 20 of the screw fixture 1, and the screw 70 is screwed. As a result, the fitting part (one valley) moves to the screw base side, and the screw 70 is fastened between the screw fixture 1 and the circuit board 60 (FIG. 10 (d)).
ねじの嵌合箇所は、図 10 (d)に示すように、ねじ山の一つの谷部 71がねじ溝 20に 位置し、谷部 71に対して下側のねじ山頂上線がねじ溝 20に沿って当接することで、 ねじ固定具 1に対してねじ 70が固定される。  As shown in Fig. 10 (d), the screw fitting location is such that one trough portion 71 of the thread is located in the thread groove 20, and the screw thread top line below the trough portion 71 is in the thread groove 20. The screw 70 is fixed to the screw fixture 1 by abutting along.
[0030] 上記したねじ固定具 1の構造によれば、ねじ 70が螺着するねじ溝 20を一連のプレ ス加工処理による一周分のねじ溝 20で形成するので、ねじ溝 20が確実に形成され たねじ固定具 1を得ることができるとともに、溝部 14の存在により十分な力しめ強度が 確保できるので、従来例で述べたように、本体フレーム 50にねじ固定具 1を装着した 段階で不良品が発生することがなぐ無駄になる部材の発生を防止することができる [0030] According to the structure of the screw fixing device 1 described above, the screw groove 20 into which the screw 70 is screwed is formed into a series of pre-sets. Since the screw fixing device 1 in which the screw groove 20 is securely formed can be obtained, and the presence of the groove portion 14 can ensure sufficient force-tightening strength. As described in the conventional example, it is possible to prevent the generation of useless members that do not cause defective products when the screw fixture 1 is attached to the main body frame 50.
[0031] 次に、本発明の他の実施例である位置決め用のねじ固定具について、図面を参照 しながら説明する。 [0031] Next, a positioning screw fixture according to another embodiment of the present invention will be described with reference to the drawings.
この例によるねじ固定具は、図 12に示されるように、円筒部 10の反フランジ部側の 先端に、段差 18を設けて円筒部 10より直径が小さい小径円筒部 19がプレス加工に より形成されている。そして、小径円筒部 19は、頂面 11によって塞がれるように構成 されている。  In the screw fixture according to this example, as shown in FIG. 12, a step 18 is provided at the tip of the cylindrical portion 10 on the side opposite to the flange portion, and a small-diameter cylindrical portion 19 having a smaller diameter than the cylindrical portion 10 is formed by pressing. Has been. The small diameter cylindrical portion 19 is configured to be blocked by the top surface 11.
この小径円筒部 19は、後述するように、本体フレームに対する回路基板の位置決 めを容易にするために形成されたものである。  As will be described later, the small-diameter cylindrical portion 19 is formed to facilitate the positioning of the circuit board with respect to the main body frame.
図 12のねじ固定具における他の部分の構成については、図 1のねじ固定具と同じ 構成であるので、同一符号を付して説明を省略する。  The configuration of other parts of the screw fixture of FIG. 12 is the same as that of the screw fixture of FIG.
[0032] また、図 12の位置決め用のねじ固定具においても、図 13に示すように、図 9と同様 の大部分が凹状となる二個の溝部 14を形成してもよい。すなわち、円筒体 10の溝部 14は、円筒部 10の表面において、二個の表面部 10a以外の部分に凹部を構成する ようにしている。 Also, in the positioning screw fixing tool of FIG. 12, as shown in FIG. 13, two groove portions 14 that are mostly concave like FIG. 9 may be formed. That is, the groove portion 14 of the cylindrical body 10 forms a recess in a portion other than the two surface portions 10 a on the surface of the cylindrical portion 10.
また、溝部を複数個形成するのではなぐ円筒部の全周に亘つて凹部となるように プレス加工で形成してもよ！/ヽ  Also, it may be formed by pressing so as to form a recess over the entire circumference of the cylindrical part instead of forming a plurality of grooves! / ヽ
[0033] 上記の段差を有する位置決め用のねじ固定具 1は、帯状板 30に対する本体形成 工程において、図 14 (a)〜（d)における複数回のプレスカ卩ェ (順送金型力卩ェ）により 、一端が開口し他端に頂面を有する円筒体 31, 32, 33を順次成型し、最終的には 頂面 11を有する小径円筒部 19により段差 18が形成された円筒部 10が成型されるよ うにプレス処理が施される。 [0033] The positioning screw fixture 1 having the above-described step is formed by a plurality of press carriages (progressive die force force) in FIGS. 14 (a) to 14 (d) in the main body forming step with respect to the belt-like plate 30. Thus, cylindrical bodies 31, 32, and 33 having one end opened and a top surface at the other end are sequentially molded, and finally the cylindrical portion 10 in which the step 18 is formed by the small diameter cylindrical portion 19 having the top surface 11 is molded. Press processing is performed as shown.
ねじ固定具 1は、帯状板 30を流れ作業で複数回プレス加工することで、一端にフラ ンジ部 13を有し、他端にねじ溝 20を有する円筒体とすることで形成される。 図 14に示す一連の工程は、金属片から構成される帯状板 30の上下に配置された 各プレ—ト（図示せず)を同期させて帯状板 30に対して近接 ·離隔するようにし、各プ レ一トによって帯状板 30をクランプした状態において各工程を同時に実施し、工程 終了後各プレートを離隔させ、帯状板 30を所定の距離だけ図面右方向へ移動させ 、各加工部分を次の工程へ順次移動させて行われる。 The screw fixture 1 is formed by pressing the belt-like plate 30 a plurality of times by a flow operation to form a cylindrical body having a flange portion 13 at one end and a thread groove 20 at the other end. In the series of steps shown in FIG. 14, the plates (not shown) arranged above and below the belt-like plate 30 made of metal pieces are synchronized with each other so as to approach and separate from the belt-like plate 30. Each step is performed simultaneously with the strip 30 clamped by each plate, and after completion of the steps, the plates are separated, and the strip 30 is moved to the right in the drawing by a predetermined distance. It is performed by sequentially moving to the process.
[0034] この処理は、 1回のプレス処理で所望の円筒体を得ることができないため、複数回 のプレス加工を順次流れ作業的に行うことで、所望形状の小径円筒部 19及び円筒 部 10を有する段差 18付き円筒体を形成することが可能となる（図 14 (d) )。  [0034] In this process, a desired cylindrical body cannot be obtained by a single press process. Therefore, by performing a plurality of press processes sequentially in a flow operation, the small-diameter cylindrical part 19 and the cylindrical part 10 having a desired shape are obtained. It is possible to form a cylindrical body with a step 18 having a height (FIG. 14 (d)).
図 14のねじ固定具の製造方法における他の工程については、図 2の製造方法ェ 程図と同じであるので、同一符号を付して説明を省略する。  Other steps in the manufacturing method of the screw fixture of FIG. 14 are the same as those of the manufacturing method flowchart of FIG.
[0035] 続いて、上記した位置決め用のねじ固定具 1の使用の仕方について、図 15を参照 しながら説明する。  Next, how to use the above-described positioning screw fixture 1 will be described with reference to FIG.
ねじ固定具 1は、液晶テレビ等の本体フレーム 50に回路基板 60を装着するための ものであり、ねじ固定具 1の本体フレーム 50への装着は、図 1のねじ固定具を説明し た図 10と同様の作業で行われる。  The screw fixing tool 1 is for mounting the circuit board 60 on the main body frame 50 of an LCD TV or the like. The mounting of the screw fixing tool 1 on the main body frame 50 is a diagram illustrating the screw fixing tool of FIG. Performed in the same way as 10
そして、本体フレーム 50に固定されたねじ固定具 1上に回路基板 60を設置し、ね じ 70を装着する（図 15 (d) )。この時、回路基板 60の孔 62に小径円筒部 19が嵌合 するように構成したため、回路基板 60の孔をねじ固定具 1の頂面 11部分の位置に合 わせてからねじ 70を挿入する手間を省くことができる。  Then, the circuit board 60 is set on the screw fixture 1 fixed to the main body frame 50, and the screw 70 is attached (FIG. 15 (d)). At this time, since the small-diameter cylindrical portion 19 is configured to fit into the hole 62 of the circuit board 60, the screw 70 is inserted after aligning the hole of the circuit board 60 with the position of the top surface 11 portion of the screw fixture 1. Save time and effort.
[0036] すなわち、本発明による位置決め用のねじ固定具 1は、図 16に示すように、本体フ レーム 50に対して回路基板 60を固定する際に使用するものであるが、回路基板の 周囲に配した複数の固定箇所 X · Yの内、対角線上に位置する固定箇所 Xについて 、本発明の位置決め用のねじ固定具 IXを使用し（図 15 (d) )、他の固定箇所 Yにつ いては、図 17に示すように高さが低く小径円筒部の径カ Sフランジ側まで連続する段 差 18のないタイプのねじ固定具 1Yを使用する。回路基板 60において、段差 18のな いねじ固定具 1Yが装着される固定箇所 Yにおいて穿孔される孔 61は、固定箇所 X に穿孔される孔 62より小径に形成されている。 That is, the screw fixing tool 1 for positioning according to the present invention is used when the circuit board 60 is fixed to the main body frame 50 as shown in FIG. Among the multiple fixing points X · Y arranged on the Y, use the screw fixing tool IX for positioning of the present invention for the fixing point X located on the diagonal line (Fig. 15 (d)), and to other fixing points Y As shown in Fig. 17, use a screw fixture 1Y of a type that is low in height and does not have step 18 that continues to the diameter flange S side of the small diameter cylindrical part. In the circuit board 60, the hole 61 drilled at the fixing point Y where the screw fixture 1Y without the step 18 is mounted is formed with a smaller diameter than the hole 62 drilled at the fixing point X.
対角線上の二箇所の固定箇所に位置決め用のねじ固定具 IXを使用すれば、ねじ 固定具 1の小径円筒部 19が孔 62に嵌合することで本体フレーム 50に対して回路基 板 60の位置が容易に決定されるとともに、ねじ 70を装着するに際してその回転動作 により回路基板 60が回転することを防止することができる。 If you use the screw fixing tool IX for positioning at two fixing points on the diagonal, The position of the circuit board 60 with respect to the main body frame 50 is easily determined by fitting the small-diameter cylindrical portion 19 of the fixture 1 into the hole 62, and the circuit board 60 is rotated by its rotation when the screw 70 is attached. Can be prevented from rotating.
[0037] 上記のねじ固定具 1の構造によれば、回路基板 60の孔 62に嵌合可能な小径円筒 部 19の存在により本体フレーム 50と回路基板 60との位置合わせを容易に行うことが できる。 [0037] According to the structure of the screw fixture 1 described above, the main body frame 50 and the circuit board 60 can be easily aligned due to the presence of the small-diameter cylindrical portion 19 that can be fitted into the hole 62 of the circuit board 60. it can.
[0038] 図 1、図 9、図 12、図 13に示された各例のねじ固定具 1の構造によれば、ねじ 70力 S 螺着するねじ溝 20を一連のプレス加工処理による一周分のねじ溝 20で形成するの で、ねじ溝 20が確実に形成されたねじ固定具 1を得ることができ、従来例で述べたよ うに、本体フレーム 50にねじ固定具 1を装着した段階で不良品が発生することがなく 、無駄になる部材の発生を防止することができる。  [0038] According to the structure of the screw fixture 1 of each example shown in FIGS. 1, 9, 12, and 13, the screw 70 force S and the screw groove 20 to be screwed are formed by a series of press processing. Therefore, it is possible to obtain the screw fixture 1 in which the screw groove 20 is securely formed. As described in the conventional example, the screw fixture 1 cannot be obtained when the screw fixture 1 is attached to the main body frame 50. A non-defective product is not generated, and generation of a wasted member can be prevented.
また、円筒部 10に形成する溝部 14についてもプレス力卩ェで形成するので、ねじ固 定具毎の処理が必要である煩雑な切削加工を行うことなく一連のプレス工程で溝部 14を設けることができる。  In addition, since the groove 14 formed in the cylindrical portion 10 is also formed by pressing force, the groove 14 is provided in a series of pressing processes without performing complicated cutting that requires processing for each screw fixing tool. Can do.
図面の簡単な説明  Brief Description of Drawings
[0039] [図 1]本発明のねじ固定具の一実施例を示すもので、（a)は平面説明図、（b)は側面 説明図、（c)は平面図の A— A線断面説明図である。  [0039] [FIG. 1] An embodiment of the screw fixing device of the present invention is shown, (a) is an explanatory plan view, (b) is an explanatory side view, and (c) is a cross-sectional view taken along line AA in the plan view. It is explanatory drawing.
[図 2] (a)〜(i)は、図 1のねじ固定具の製造工程を説明するための工程説明図であ る。  [FIG. 2] (a) to (i) are process explanatory views for explaining a manufacturing process of the screw fixture of FIG.
[図 3]ねじ固定具の製造工程における孔形成工程で穿孔される穴の形状を示す平面 図である。  FIG. 3 is a plan view showing the shape of a hole drilled in the hole forming step in the manufacturing process of the screw fixture.
[図 4] (a) (b) (c)はねじ固定具の製造工程におけるねじ溝加工工程でプレス加工さ れたねじ溝を示すもので、 （b)は平面説明図、（a)は (b)の A矢視説明図、（c)は (b) の B— B断面説明図である。  [Fig. 4] (a), (b), and (c) show the thread grooves pressed in the thread groove machining process in the manufacturing process of the screw fixture. (b) is an explanatory view taken along the arrow A, and (c) is an explanatory view taken along the line BB of (b).
[図 5]本発明のねじ固定具の製造工程における帯状体に対するカム機構の位置関係 を示す平面説明図である。  FIG. 5 is an explanatory plan view showing the positional relationship of the cam mechanism with respect to the strip in the manufacturing process of the screw fixture of the present invention.
[図 6] (a) (b)はカム機構の動作状態を示す平面説明図であり、（a)は水平動作前の 状態を、（b)は水平動作後の状態を示す。 [図 7] (a) (b)はカム機構の動作状態を示す側面説明図であり、（a)は水平動作前の 状態を、（b)は水平動作後の状態を示す。 [Fig. 6] (a) and (b) are plan explanatory views showing the operating state of the cam mechanism, (a) showing the state before the horizontal operation, and (b) showing the state after the horizontal operation. [Fig. 7] (a) and (b) are side explanatory views showing the operating state of the cam mechanism. (A) shows the state before the horizontal operation, and (b) shows the state after the horizontal operation.
[図 8] (a) (b)はカム機構による帯状体の刻設状態を説明する拡大断面説明図であり 、（a)は水平動作前の状態を、（b)は水平動作後の状態を示す。  [Fig. 8] (a) and (b) are enlarged cross-sectional explanatory views for explaining the engraved state of the belt-like body by the cam mechanism, (a) is a state before horizontal operation, and (b) is a state after horizontal operation. Indicates.
[図 9]本発明のねじ固定具の他の実施例を示すもので、 （a)は平面説明図、（b)は側 面説明図、（c)は平面図の A— A線断面説明図である。 FIG. 9 shows another embodiment of the screw fixture according to the present invention. (A) is an explanatory plan view, (b) is an explanatory side view, and (c) is a sectional view taken along line AA in the plan view. FIG.
[図 10] (a)〜（d)は、図 1又は図 7のねじ固定具の使用の仕方を説明するための断面 説明図である。  10] (a) to (d) are cross-sectional explanatory views for explaining how to use the screw fixture of FIG. 1 or FIG.
[図 11] (a)及び (b)は、図 1又は図 7のねじ固定具の使用の仕方を説明するための一 部拡大断面説明図である。  [FIG. 11] (a) and (b) are partially enlarged cross-sectional explanatory views for explaining how to use the screw fixture of FIG. 1 or FIG.
[図 12]本発明のねじ固定具 (位置決め用）の他の実施例を示すもので、（a)は平面説 明図、（b)は側面説明図、（c)は平面図の A— A線断面説明図である。  [Fig. 12] Another embodiment of the screw fixture of the present invention (for positioning) is shown. (A) is a plan view, (b) is a side view, and (c) is a plan view of A— It is A line sectional explanatory drawing.
[図 13]本発明のねじ固定具 (位置決め用）の他の実施例を示すもので、（a)は平面説 明図、（b)は側面説明図、（c)は平面図の A— A線断面説明図である。  FIG. 13 shows another embodiment of the screw fixture of the present invention (for positioning), (a) is a plan view, (b) is a side view, and (c) is an A— It is A line sectional explanatory drawing.
[図 14] (a)〜(i)は、図 10又は図 11のねじ固定具 (位置決め用）の製造工程を説明 するための工程説明図である。  [FIG. 14] (a) to (i) are process explanatory views for explaining a manufacturing process of the screw fixture (for positioning) of FIG. 10 or FIG.
[図 15] (a)〜（d)は、図 10又は図 11のねじ固定具 (位置決め用）の使用の仕方を説 明するための断面説明図である。  [FIG. 15] (a) to (d) are cross-sectional explanatory views for explaining how to use the screw fixture (for positioning) of FIG. 10 or FIG.
[図 16]本体フレームに対して回路基板を固定する場合の状態を示す平面説明図で ある。  FIG. 16 is an explanatory plan view showing a state where the circuit board is fixed to the main body frame.
[図 17]位置決め用でないねじ固定具を使用した場合の固定構造を示す断面説明図 である。  FIG. 17 is a cross-sectional explanatory view showing a fixing structure when a screw fixing tool not for positioning is used.
[図 18]従来のねじ固定具の構造を示すもので、 （a)は平面説明図、（b)は側面説明 図、（c)は断面説明図である。  FIG. 18 shows the structure of a conventional screw fixture, wherein (a) is an explanatory plan view, (b) is an explanatory side view, and (c) is an explanatory sectional view.
[図 19]従来のねじ固定具を使用した本体フレームと回路基板との固定状態を示す断 面説明図である。  FIG. 19 is a cross-sectional explanatory view showing a fixed state between the main body frame and the circuit board using a conventional screw fixing tool.
符号の説明 Explanation of symbols
1 ねじ固定具 円筒部 頂面 フランジ部 溝部 空間部 段差 小径円筒部 ねじ溝 段差吸収孔 帯状板 穴 フランジ部 切削溝部 かしめ処理 本体フレーム 回路基板 ねじ 谷部 カム機構 カム機構本体 スライド体 押圧板 方形突出部 下型 プレート 円柱溝部 上型 プレート 122 円柱部 123 緩衝手段 125 連動体 1 Screw fixing Cylindrical part Top surface Flange part Groove part Space part Step Small-diameter cylindrical part Screw groove Step absorption hole Strip plate hole Flange part Cutting groove part Caulking process Main body frame Circuit board Screw Valley part Cam mechanism Cam mechanism Main body Slide body Press plate Rectangular protrusion Lower plate Plate Cylinder Groove upper mold plate 122 Cylinder 123 Buffering means 125 Interlocking body

Claims

請求の範囲 The scope of the claims
[1] 平板に形成された穴に力しめ処理されることで前記平板に対して固定可能なフラン ジ部と、該フランジ部に連続し内部に空間を存在させた円筒部とを具備するねじ固定 具であって、  [1] A screw having a flange portion that can be fixed to the flat plate by being squeezed into a hole formed in the flat plate, and a cylindrical portion that is continuous with the flange portion and has a space inside. A fixture,
前記円筒部の反フランジ部を塞ぐ頂面に、プレス加工処理により二 のねじ溝を 形成して成る  Two screw grooves are formed on the top surface that closes the anti-flange portion of the cylindrical portion by press working.
ことを特徴とするねじ固定具。  A screw fixture characterized by that.
[2] 前記フランジ部周囲に凹凸が連続する山状及び谷状を形成した請求項 1に記載の ねじ固定具。  [2] The screw fixture according to [1], wherein a mountain shape and a valley shape in which irregularities are continuous are formed around the flange portion.
[3] 前記円筒部のフランジ部側の端部に、プレス加工処理により溝部を形成した請求項 1に記載のねじ固定具。  [3] The screw fixture according to [1], wherein a groove is formed by press working at an end of the cylindrical portion on the flange side.
[4] 前記溝部を複数個形成し、各溝部は、互いに対向する位置に配置された請求項 3に 記載のねじ固定具。  [4] The screw fixture according to claim 3, wherein a plurality of the groove portions are formed, and the groove portions are arranged at positions facing each other.
[5] 前記円筒部の反フランジ部側に円筒部より直径が小さい小径円筒部を設けて段差を 形成した請求項 1に記載のねじ固定具。  5. The screw fixture according to claim 1, wherein a step is formed by providing a small-diameter cylindrical portion having a diameter smaller than that of the cylindrical portion on the side opposite to the flange portion of the cylindrical portion.
[6] 帯状板を流れ作業で上型及び下型による垂直方向の複数回プレス加工することで、 一端にフランジ部を、他端にねじ溝を有する円筒状のねじ固定具を製造する方法で あって、 [6] A method of manufacturing a cylindrical screw fixture having a flange portion at one end and a thread groove at the other end by press-working the strip-like plate multiple times in a vertical direction by a flow operation. There,
一端が開口し他端に頂面を有する円筒状となるように前記上型及び下型による複 数回のプレス加工で円筒体を形成する本体形成工程と、  A main body forming step of forming a cylindrical body by a plurality of press operations by the upper mold and the lower mold so that one end is open and a cylindrical shape having a top surface at the other end;
前記円筒体の頂面にプレス加工で穴を穿孔する孔形成工程と、  A hole forming step of drilling a hole in the top surface of the cylindrical body by pressing; and
前記穴が形成された頂面に段差吸収孔を備えた一周分のねじ溝をプレス加工で 形成するねじ溝加工工程と、  A thread groove processing step of forming a screw groove for one round provided with a step absorption hole on the top surface where the hole is formed;
前記帯状板カゝらねじ溝が形成された円筒体を周囲にフランジ部を有するように切り 落とす切り落し加工工程と、  A cutting process step of cutting off the cylindrical body formed with the thread groove from the belt-like plate cover so as to have a flange portion around it;
を具備することを特徴とするねじ固定具の製造方法。  The manufacturing method of the screw fixing tool characterized by the above-mentioned.
[7] 前記ねじ溝加工工程の後に、所定の下型のプレートに対して、対応する上型のプレ ートの鉛直方向の動きを水平方向の動きに変換して対向動作するカム機構を組み込 んで、前記円筒体に対して対向する水平方向からプレス加工することにより、前記円 筒体の基部側面にプレス加工処理により溝部を形成する溝部加工工程を行う請求 項 6に記載のねじ固定具の製造方法。 [7] After the thread grooving step, a cam mechanism is constructed that opposes the predetermined lower mold plate by converting the vertical movement of the corresponding upper mold into a horizontal movement. Included 7. The screw fixing device according to claim 6, wherein a groove portion machining step is performed in which a groove portion is formed on the base side surface of the cylindrical body by press working by pressing from a horizontal direction facing the cylindrical body. Production method.
[8] 前記溝部加工工程において、前記カム機構を二対配置し、円筒体に四箇所の溝部 を同時に形成する請求項 7に記載のねじ固定具の製造方法。 8. The method for manufacturing a screw fixture according to claim 7, wherein in the groove portion machining step, two pairs of the cam mechanisms are arranged, and four groove portions are simultaneously formed in the cylindrical body.
[9] 前記孔形成工程において、前記円筒体の頂面にプレス加工で穿孔する穴は、円形 部に長孔部を連結した形状を基本形状とし、前記円形部と長孔部との連結付近にお いて左右非対称の形状である請求項 6に記載のねじ固定具の製造方法。 [9] In the hole forming step, the hole to be drilled on the top surface of the cylindrical body by a press process has a basic shape in which a long hole is connected to a circular part, and is near the connection between the circular part and the long hole. 7. The method for manufacturing a screw fixture according to claim 6, wherein the screw fixing tool has an asymmetric shape.
PCT/JP2007/063399 2006-07-10 2007-07-04 Screw fixing device and method of manufacturing screw fixing device WO2008007593A1 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2006-188840 2006-07-10
JP2006188840 2006-07-10
JP2007-000753U 2007-02-08
JP2007-000752U 2007-02-08
JP2007000753U JP3131207U (en) 2007-02-08 2007-02-08 Screw fixture
JP2007000752U JP3131392U (en) 2007-02-08 2007-02-08 Screw fixture
JP2007-113483 2007-04-23
JP2007113483A JP5019593B2 (en) 2007-04-23 2007-04-23 Manufacturing method of screw fixture

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