JP2006009975A - Operating screw member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating screw member having reliable anti-come-off effects while maintaining function. <P>SOLUTION: A knob member 10 having a first engaging inner peripheral face 15 of which a head portion 5 is fitted in rotation transmissive engagement with a screw is fitted to the head portion 5 of the screw 2. The knob member 10 has an anti-come-off portion 12 extending along a leg portion 3 of the screw 2 and having elastic property at the front end to be flexible. Into the rear of the knob member 10, an anti-come-off plug 20 is fitted which has a second engaging inner peripheral face 26 for abutting on the head portion 5 of the screw 2 to be put in rotation transmissive engagement with the head portion 5, Thus, the assembled operating screw member is obtained which is easy to assemble and easier to manufacture than the one in which a resin member is formed integrally with a screw. The anti-come-off portion fitted to the mounting member is hard to crack or damage when fitted therein or subjected to tensile force. Additionally, almost no breakage occurs in assembling work at site, and occurrence of defective goods is reduced and less parts are disposed of. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a screw member that can be manually operated when closing a door plate of a power transmission cabinet that houses a power source and a control electrical unit such as a switchboard or a monitoring panel, or when manually attaching a unit. In addition, the present invention relates to a screw member for operation that prevents the screw member from being dropped and lost from a door plate or unit that has been fixed to the workpiece.

  As shown in FIG. 9, the door plate of the electrical cabinet generally incorporating a switchboard, a monitoring panel, etc., uses an opening / closing handle (not shown) and a screw member so that the door plate 30 does not open even if the handle is removed at the top and bottom. And fixed. As this screw member, the one shown in FIG. 10 has been conventionally used. This is a screw member having a pointed tip and a continuous thread 104, and the screw member 101 is attached to a case body as a work constituting the electrical cabinet. , The door plate 30 is fitted between the screw thread 104 and the head 105, and the E-ring 107 is fitted after the resin washer 106 is interposed between the screw thread 104 and the head 105, thereby preventing the screw member 101. Is prevented from falling off the door plate 30.

In place of this, as shown in FIG. 11, recently, an elastic locking claw with a guide taper surface that protrudes outward from the outer diameter of the screw portion 204 to the concave portion 206 for attaching the temporary holding member of the bolt shaft portion 203. A bolt in which a synthetic resin temporary holding member 210 having 213 is integrally attached with its attachment base 207 is used. In this structure, the mounting member is fitted between the elastic locking claw and the bolt head, and the bolt is prevented from falling off the mounting member by the elastic locking claw.
JP-A-6-32723

  However, since such a bolt is fitted via a ring body into a recess formed near the head that is thinner than the bolt shaft portion on which the thread portion is formed, the bolt may be fitted or pulled. The temporary holding member is liable to crack when the is operated, and the gap between the ring body and the elastic locking claw is small, and the length of the claw is limited to the length of the ring body, and the portion where this bending occurs is short. Therefore, the bending of the elastic locking claw can be set only slightly. For this reason, the height of the locking claw is limited, and this elastic locking claw is easily broken when a bolt is attached to or detached from the attachment member. Furthermore, in the assembling work at the work site, the temporary holding member is easily damaged, and the disposal as a defective product is increasing. In addition, it is necessary for the operator to check the screw thread each time whether the nominal diameter and pitch or leg length of the screw is different from that of the female screw hole, and it is difficult to check at a glance and skill is required. In addition, when separating and disposing of the assembled one end, it takes time and labor to separate the bolts, and it cannot be reused, causing problems such as affecting environmental problems.

  An object of the present invention is to obtain a screw member for operation that can solve such problems and can exhibit a reliable retaining function while maintaining the functions so far.

  An object of the present invention is a structure in which a screw member is screwed into a female screw hole 41 formed in a workpiece and the attachment member is screwed, and the outer peripheral polygonal head portion 5 of the screw 2 is capable of transmitting rotation. A resin-made knob member 10 having a first engagement inner peripheral surface 15 that is fitted so as to be fitted is fitted to the head portion 5 of the screw 2, and the leg portion 3 of the screw 2 is connected to the knob member 10. A retaining portion 12 having elasticity is provided so as to bend along a predetermined gap in a direction along which the tip crosses the leg portion 3, while the screw 2 is provided at the rear portion of the knob member 10. By providing a screw member for operation assembled by fitting a stopper plug 20 having a second engagement inner peripheral surface 26 that contacts the head 5 and engages the head 5 so as to be able to transmit rotation. Achieved.

  In order to achieve this object, in addition to the above configuration, the retaining portion has a cantilever structure in which one end is integrated with the knob member 10, and a plurality of equal intervals are provided around the leg portion 3 of the screw 2. Further, the screw member for operation may be configured to have a first locking portion 13 having a tapered shape at the tip, which is disposed along the axis and protrudes outward from the outer periphery thereof.

  Further, the stopper plug in the above structure has a flat surface along at least two of the outer peripheral surfaces of the outer peripheral polygonal shape on the inner surface, and a drive groove 27 crossing the center line at the rear end thereof. The rotation force can be transmitted directly from the drive groove to the screw, and the knob member can be screwed in without being grasped by the operator.

  In addition, the retaining plug having the above-described structure has elasticity in a direction crossing the center line so that the side to be fitted to the knob member 10 is bent, and the hook member is formed with the second locking portion 25 at the tip. 24 are extended at equal intervals, and the hook member 24 is inserted into the guide hole 17 formed in the knob member 10 so that the knob member 10 and the stopper plug 20 are integrated with each other. Since it is the structure which presses the head 5, an operator can assemble directly at a work site and can provide an inexpensive screw member for operation.

  According to the present invention, it is not a configuration that fits through a ring in a recess formed near the head that is thinner than the bolt shaft portion on which the screw portion is formed, but a commercially available head. As the screw and knob member are integrated by inserting a screw having a polygonal outer peripheral surface into the resin knob member and pressing the screw head with a stopper plug, the screw and knob member are integrated. The operation is simplified, and the manufacturing is simplified as compared with the resin member integrally formed with the screw. In addition, the retaining portion that fits into the mounting member is not easily cracked or damaged when it is fitted or when a tensile force is applied, and in addition, a sufficient clearance should be provided between the retaining portion and the screw shaft. As a result, a sufficient deflection can be obtained at the retaining portion when press-fitting into the mounting hole of the mounting member, and is hardly affected by the error of the mounting hole. Furthermore, in assembly work at the work site, there is almost no damage, the occurrence of defective products is reduced, and there are few parts to be discarded.

  Moreover, since the stopper plug is fitted into the knob member, the stopper plug is colored in various colors, and a different color is used depending on the name of the screw, the pitch or the leg length. For example, even if the nominal diameter and pitch of the screw or the leg length of the screw are different, it is not necessary for the operator to check the screw thread or leg length each time, and the screw corresponding to the female screw hole should be used simply by checking the color. This eliminates the need for operator skill. In addition, when separating and disposing of the built-in one end, it is possible to easily separate the metal screw and the resin knob by simply bending the hook member of the retaining plug inward and removing it, Resource reuse is improved. In addition, the retaining stopper is formed with an engagement inner peripheral surface that engages with the outer peripheral surface of the polygonal shape of the screw on the inner surface, and a drive groove is formed on the upper portion thereof, so that a coin or a plate-shaped metal piece Therefore, the screw can be turned and can be used at a place where the operator cannot pick it by hand. Furthermore, if a through-hole is formed in the center of the stopper plug, the drive groove in the head of the metal screw can be directly turned with a driver bit, so that a large driving force is not applied to the resin member. There are specific effects such as no breakage between the screw and the knob member.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2, reference numeral 1 includes a resin knob 10 having a knurled outer periphery, and a metal screw 2 that is integral with the knob 10 and has a thread 4 on the outer periphery of the leg 3. It is a screw member for operation. In the metal screw 2, the tip of the leg 3 has a pointed shape, and a head 5 having a diameter larger than that of the leg 3 is formed at the rear end. A thread 4 is formed from the tip of the leg 3 to the head 5, and the outer surface of the head 5 has a hexagonal shape. In addition to the hexagonal shape, the outer peripheral surface of the head may be flat on the two opposing surfaces, or may be square, chevron-shaped, or any polygonal shape that transmits rotation. It may be a simple shape.

  On the other hand, as shown in FIGS. 3 and 5, the resin knob 10 has a cylindrical shape slightly smaller in diameter than the mounting hole 31 of the mounting member shown in FIG. A plurality of retaining portions 12 formed by providing a plurality of slits 11 at equal intervals on the circumference are formed. In this embodiment, four retaining portions 12 are formed, but there may be three, five, or more. The retaining portion 12 has a cantilever structure in which one end is integrated with the seating surface of the knob member 10 and has elasticity so that bending occurs in a direction crossing the center line, and a cylindrical portion is disposed at the other end. The first locking portion 13 is projected outward from the outer peripheral surface and inclined forward so that the tip has a tapered shape.

  A leg insertion hole 14 into which the leg 3 of the metal screw 2 can be inserted is formed in the knob member 10 on the center line, and the head outer peripheral surface polygon of the screw 2 is formed behind the hole 14. It has the 1st engagement inner peripheral surface 15 in which the required number of flat inner surfaces which carry out surface contact with a shape were formed. In this embodiment, the first engagement inner peripheral surface 15 is in conformity with the hexagonal outer peripheral surface of the screw 2 and has an inner surface shape that is flat at equal intervals so that the three surfaces can be engaged. ing. The shape of the first engaging inner peripheral surface 15 may be a polygonal inner surface shape having two or more opposing surfaces in accordance with the head outer peripheral shape of the screw 1, and the head outer peripheral surface shape of the metal screw 2. As long as the rotation from the knob member 10 is transmitted to the screw 2 by engaging with the screw, the shape is not particularly limited. Further, as shown in FIGS. 1 and 4, the first engagement inner peripheral surface 15 is formed so that its height is about half of the height of the head of the screw 2. A fitting hole 16 having a diameter larger than that of the first engagement inner peripheral surface 15 is formed from the peripheral surface 15 to the end surface of the knob member 10. A guide hole 17 having a predetermined width along the inner peripheral surface of the fitting hole 16 is formed at a position equally divided into three in the circumferential direction from the bottom surface of the fitting hole 16 to the retaining portion side.

  The fitting hole 16 is fitted with a retaining plug 20 provided with a bottomed hole 21 having an end surface that comes into contact with the head 5 of the metal screw 2. 7 and 7, a side wall 22 of the bottomed hole 21 is formed with a slit 23 between the side wall 22 so that one end is integrated with the bottom wall 21 to form a cantilever structure. A hooking member 24 having elasticity so as to bend in the transverse direction is formed on this circumference at equal intervals and at three-divided positions. The hooking member 24 extends forward from the side wall 22 longer than the thickness of the guide hole 17, and protrudes outward at the tip thereof, and inclines inward as it reaches the tip shape. A second locking piece 25 is formed. In this embodiment, the hooking member 24 is provided at the position divided into three parts. However, the hooking member 24 may be provided at a position divided into two, four, five or six parts. It may be provided as appropriate.

  Moreover, the side wall portion 22 of the bottomed hole 21 can be engaged with three surfaces according to the hexagonal head outer peripheral surface of the screw 2 in the same manner as the first engaging inner peripheral surface 15 of the knob member 10. In this way, the second engagement inner peripheral surface 26 has a shape in which the three surfaces are flat at equal intervals. The height of the side wall 22 is about half of the height of the head of the screw 2, and the height of the head 5 of the screw 2 is matched with the height of the first engaging inner peripheral surface 15 of the knob member 10. It is almost equal to the height. Similarly to the first engagement inner peripheral surface 15, the second engagement inner peripheral surface 26 of the side wall portion 22 can also be a flat surface along at least two surfaces or a polygonal inner surface shape having more than that. A drive groove 27 is formed at the rear end of the retaining stopper 20 in a direction crossing the center line, and the drive groove 27 is engaged with a coin or a plate-shaped metal piece.

  When the knob member 10 and the stopper plug 20 configured as described above are assembled to the metal screw 2 as shown in FIG. 1, first, the leg insertion hole 14 of the knob member 10 is first inserted into the leg insertion hole 14 from the fitting hole side. The leg 3 is inserted with the tip of the screw 2 first. Thus, the head seating surface of the screw 2 is seated on the bottom of the engaging portion where the first engagement inner peripheral surface 15 is located, and the head 5 is in contact with the three surfaces of the first engagement inner peripheral surface 15. Fits into. Subsequently, the stopper plug 20 is inserted into the fitting hole 16. At this time, the hook member 24 of the stopper plug 20 is positioned so as to coincide with the guide hole 17, and the second engagement inner peripheral surface 26 of the side wall portion 22 is aligned with the outer periphery of the head of the screw 2. When pushed in, the hook member 24 is inserted while constricting inward, and at the same time, the stopper plug 20 enters the fitting hole 16. When the second locking portion piece 25 formed at the tip of the hooking member 24 passes through the guide hole 17 in this way, the hooking member 24 returns to its original state due to its elasticity, and the second locking portion. The piece 25 engages with the seating surface of the knob member 10.

  Then, after assembling the operation screw member 1 as described above, the operation will be described for the case where the operation screw member 1 is attached to the door plate 30 of the case 40 constituting the electrical cabinet shown in FIGS. A mounting hole 31 having a diameter slightly larger than the cylindrical portion of the retaining portion 12 and having a diameter smaller than that of the first locking portion 13 is formed in advance at a predetermined position of the door plate 30. Thereafter, the operation screw member 1 is inserted into the mounting hole 31 with the leg portion 3 first.

  Since the outer diameter of the first locking piece 13 of the retaining portion 12 provided on the knob member 10 constituting the operating screw member 1 at the time of insertion is larger than the diameter of the mounting hole 31, the screw member 1 is removed. Furthermore, the conical first locking part 13 formed in a tapered shape by being pushed inwardly bends inward, and the first locking part 13 is inserted into the mounting hole 31 to prevent the retaining part. 12 fits into the mounting hole 31 of the door plate 30. On the other hand, the first latching piece 13 returns to the original as soon as it comes out of the mounting hole 31, and the first latching piece 13 engages with the back surface of the door plate 30. It does not fall out from the mounting hole 31 of the door plate 30.

  Then, the thread 4 formed on the leg portion 3 of the operation screw member 1 is screwed into the female screw hole 41 provided in advance at a predetermined position of the case 40 of the electrical cabinet as the work. Thus, the door plate 30 is fixed. In this screwing operation, the operator usually holds the knob member 10 by hand and rotates the screw. However, a coin or plate-shaped metal piece is engaged with the drive groove 27 of the retaining plug 20 to The same operation can also be performed by applying a rotating external force to the wheel.

  In addition to this, since the stopper plug 20 in this embodiment is made of resin, it is molded in various colors such as red, blue, and yellow, and by preparing only necessary colors, screws The ones with different names, pitches and leg lengths can be selected by color. Thereby, it becomes possible to use properly for every use. Moreover, in this embodiment, the stopper plug 20 has the bottomed hole 21, but instead of this, a + or − drive groove (not shown) is formed in the head 5 of the metal screw 2. In such a case, if a through hole (not shown) is inserted in the bottomed hole 21 so that a driver bit (not shown) that engages with these is inserted in the bottomed hole 21, the metal screw 2 can be directly attached with the driver bit. It can also be rotated, improving usability.

It is a principal part cross-sectional front view of the screw member for operation which shows embodiment of this invention. It is a head side side view of FIG. It is a principal part sectional front view of the knob member concerning the present invention. FIG. 4 is a right side view of FIG. 3. FIG. 4 is a left side view of FIG. 3. It is a front external view of a stopper plug. FIG. 7 is a left side view of FIG. 6. It is a partial cross section front view which shows the use condition of this invention. It is a perspective view of the electrical equipment cabinet which uses this invention. It is a front view which shows the prior art example of this invention. It is sectional drawing which shows another prior art example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation screw member 2 Metal screw 3 Leg part 4 Screw thread 5 Head 10 Knob member 11 Slit 12 Retaining part 13 1st latching | locking piece 14 Leg part insertion hole 15 1st engagement inner peripheral surface 16 fitting hole 17 guide hole 20 retaining plug 21 bottomed hole 22 side wall part 23 slit 24 hooking member 25 second locking part piece 26 second engagement inner peripheral surface 27 drive groove 30 door plate 31 mounting hole 40 Case 41 Female thread hole

Claims (4)

  The structure is such that a screw member is screwed into a female screw hole (41) formed in the workpiece and the mounting member is screwed, and the outer polygonal head (5) of the screw (2) is capable of transmitting rotation. A resin-made knob member (10) having a first engagement inner peripheral surface (15) fitted so as to be fitted is fitted to the head portion of the screw, and the screw leg (3 ) And a retaining portion (12) having elasticity so as to bend in a direction along which the front end crosses the leg portion with a predetermined gap, while the screw member is provided at the rear portion of the knob member. An operation characterized in that it is assembled by fitting a stopper plug (20) having a second engaging inner peripheral surface (26) that abuts the head of the head and engages with the head so as to transmit rotation. Screw member.   The retaining part is a cantilever structure with one end integrated with the knob member, and is arranged along the axis at equal intervals around the leg part of the screw. The screw member for operation according to claim 1, wherein the screw member for operation has a configuration in which the first locking piece (13) having a tapered tip is projected outward.   The retaining plug has a flat surface along at least two of the outer peripheral surfaces of the outer peripheral polygonal shape on the inner surface, and a drive groove (27) that crosses the center line of the flat surface is formed at the rear end thereof. The operating screw member according to claim 1 or 2, wherein a rotational external force can be transmitted to the head. The stopper plug has elasticity in a direction crossing the center line of the stopper member so as to bend on the side fitted to the knob member, and has a hook member (24) formed with a second locking piece (25) at the tip. A structure in which a plurality of extension members are provided at intervals and the hook member is inserted into a guide hole (17) formed in the knob member so that the knob member and the stopper plug are integrated to press the head of the screw. The screw member for operation according to claim 1, 2 or 3, wherein

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