JP2010058195A - Screw fastening device, and screw fastening and removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw fastening device capable of strongly fastening a male screw member to be fastened without hardly damaging the male screw member to be fastened even in the case of the male screw member having low strength. <P>SOLUTION: The screw fastening device comprises: a cylindrical fastening female screw member 1 having a female screw 11; a connection/disconnection end surface 24 axially overlapped with one axial end surface 80 of the fastening female screw member 1; a pressure member 2 which is on the same side as the connection/disconnection end surface 24 and having a pressure surface 25 axially overlapped with an inside of an inscribed circle of the female screw 11; and a bolt 3 capable of axially connecting the fastening female screw member 1 with the pressure member 2 in such a state that they cannot relatively rotate each other in a peripheral direction of the fastening female member 1, and capable of varying the relative position in the axial direction of the pressure member 2 to the fastening female member 1. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a screw fastening device, a screw fastening method, and a screw removing method.

  Conventionally, some pin type cages have a configuration in which an annular screw member is tightened.

  For example, a pin type cage described in Japanese Utility Model Publication No. 56-115033 (Patent Document 1) includes an outer peripheral surface having a male screw and a tapered inner peripheral surface between a screw hole of a ring and a tapered outer peripheral surface of a pin. And the ring, the pin and the screw member are integrated by welding.

  Here, as a method of tightening such an annular screw member, conventionally, a linear groove is formed on the end surface opposite to the insertion side of the screw member, a minus tribar is engaged with the groove, There is a method of tightening the screw member by applying rotational torque to the screw member with a flathead screwdriver.

  However, in the case of a screw member having a small end face area and a small end face strength, such as the annular screw member of the pin type cage, when applying a large torque to the end face groove using this method, Due to the rotational torque, the groove on the end face may be greatly deformed, making it impossible to ship as a product.

On the other hand, in order to avoid the deformation of the groove on the end face of the screw member, when the screw member is tightened with a weak rotational torque, the screw member cannot be tightened strongly. It will not be possible to make it too large.
Japanese Utility Model Publication No. 56-115033 (Fig. 3)

  Accordingly, an object of the present invention is to provide a screw fastening device and a screw fastening method capable of strongly fastening a fastened male screw member with little strength even though the fastened male screw member is weak in strength. It is to provide.

  Moreover, the subject of this invention is providing the removal method of the screw | thread which can be removed from the to-be-fitted screw fastening member, without damaging the to-be-fastened male screw member fastened by the to-be-fitted screw fastening member.

In order to solve the above-described problem, the screw tightening device of the present invention includes:
An annular fastening female screw member having a female screw on the inner periphery;
A contacting / separating end surface that overlaps with one end surface in the axial direction of the fastening female screw member, and a pressing surface that is on the same side as the contacting / separating end surface and overlaps the axial direction inside an inscribed circle of the female screw A pressing member having
The fastening female screw member and the pressing member can be connected in the axial direction in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member, and the relative positions in the axial direction of the fastening female screw member and the pressing member And a fastening member that can be varied.

  Note that the phrase “the pressing surface that overlaps the inside of the inscribed circle of the female screw in the axial direction” means that the pressing surface exists at a position that overlaps the fastening female screw member in the radial direction, and the pressing surface. Includes two cases in which the fastening female screw member is present at a position that does not overlap in the radial direction.

  The fastening member has a function of making the fastening female screw member and the pressing member non-rotatable relative to each other in the circumferential direction of the fastening female screw member, and connecting the fastening female screw member and the pressing member in the axial direction. You may comprise with the member which has both the function to do.

  The fastening member has a function of making the fastening female screw member and the pressing member non-rotatable relative to each other in the circumferential direction of the fastening female screw member, while the fastening female screw member and the pressing member are axially arranged. The fastening female screw member does not have a function of making the first member not having a function of connecting to the fastening female screw member and the pressing member non-rotatable relative to each other in the circumferential direction of the fastening female screw member. And a second member having a function of connecting the pressing member in the axial direction.

  According to the present invention, the fastened male screw member is fastened as follows, for example.

  First, the fastening female screw member and the pressing member are coupled in the axial direction by the fastening member in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member.

  Thereafter, the male screw of the male screw member to be fastened is screwed with the female screw of the female screw member until the axial end surface of the male screw member to be fastened comes into contact with the pressing surface of the pressing member.

  Subsequently, by applying rotational torque to the pressing member, rotational torque is applied to the end surface of the fastened male screw member in contact with the pressing surface by frictional force, and the fastened male screw member is tightened. .

  According to the present invention, the rotational torque is applied to the male screw member to be fastened by the static frictional force between the end surface of the male screw member to be fastened and the pressing surface of the pressing member. It is not a configuration that applies a large local rotational torque to the groove formed on the end surface of the fastening male screw member, but a configuration that applies a rotational torque substantially evenly over the entire end surface of the fastened male screw member. By applying the rotational torque to the male screw member, it is possible to almost completely prevent the end face of the fastened male screw member from being deformed or damaged.

  Moreover, according to this invention, since a rotational torque can be provided to the whole end surface of a to-be-fastened male screw member, a big rotational torque can be provided to a to-be-fastened male screw member. Therefore, the fastened male screw member can be strongly tightened.

In one embodiment,
The pressing member is
A disc-shaped portion having the contact and separation end surfaces;
It has the protrusion part which has the said press surface while it protrudes in the said axial direction from the said contact-and-separation end surface side of the said disk-shaped part.

  According to the embodiment, in the state where the fastened male screw member is fastened to the fastened female screw member, the axial dimension of the portion of the fastened male screw member that protrudes from the fastened female screw member can be reduced.

In one embodiment,
The one end surface of the fastening female screw member has a plurality of screw holes,
The disk-shaped part has a plurality of through-holes that are open at the contact and separation end surfaces and are spaced from each other in the circumferential direction of the disk-shaped part,
The fastening member is a plurality of bolts,
In a state where the fastening female screw member and the pressing member are connected in the axial direction, the bolts are inserted into the through-holes of the disk-shaped portion and are inserted into the screw holes of the one end surface. It is screwed.

  According to the embodiment, the fastening female screw member and the pressing member are in a state in which the fastening female screw member and the pressing member are not rotatable relative to each other in the circumferential direction of the fastening female screw member by the plurality of bolts that are spaced apart from each other in the circumferential direction. Since it is connected in the axial direction, it is possible to reliably prevent the relative position of the pressing member with respect to the fastening female screw member from changing during tightening of the fastened male screw member. Therefore, a large rotational torque can be continuously applied to the fastened male screw member during tightening of the fastened male screw member.

In addition, the screw fastening method of the present invention includes:
One end portion of a fastened male screw member having a male screw is screwed into a fastened female screw member having a female screw,
Screw the other end of the fastened male screw member into the fastening female screw member having the female screw,
The fastening female screw member, and a pressing member having a pressing surface overlapping in the axial direction on the inner side of the inscribed circle of the female screw of the fastening female screw member, the shaft in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member. Connected in the direction,
The pressing surface and the other end of the fastened male screw member are connected in the axial direction in a state in which the pressing member and the fastening female screw member are not rotatable relative to each other in the circumferential direction of the fastening female screw. Contact the end face of the part,
Thereafter, by applying a rotational torque to the pressing member and rotating the fastening female screw member and the pressing member in a circumferential direction of the fastening female screw member, the fastening male screw member in contact with the pressing surface is provided. A rotational torque is applied to the end surface of the other end portion by a frictional force, and the fastened male screw member is fastened to the fastened female screw member.

  According to the present invention, it is possible to apply a rotational torque almost uniformly and evenly to the entire end face of the fastened male screw member, and locally in the groove formed on the end face of the fastened male screw member as in the conventional example. Large rotating torque is not applied. Therefore, the end face of the fastened male screw member is not deformed or damaged during tightening of the fastened male screw member, so that the product cannot be shipped.

  Further, according to the present invention, since the rotational torque can be applied to the entire end face of the fastened male screw member, a large rotational torque can be given to the fastened male screw member, and the fastened male screw member is tightened strongly. be able to.

In one embodiment,
After fastening the fastened male screw member to the fastened female screw member,
Separating the end surface of the other end of the fastened male screw member and the pressing surface;
Thereafter, the screwed male screw member and the fastening female screw member are released, and the fastened male screw member, the fastening female screw member, and the pressing member are separated.

According to the above embodiment,
After the male screw member to be fastened is separated from the pressing surface of the pressing member, the male screw member to be fastened, the fastening female screw member and the pressing member are separated from each other. The rotational torque with which the fastening male screw member is pulled out from the fastened female screw member is hardly applied to the fastened male screw member.

Moreover, the method for removing the screw of the present invention includes:
In the fastened male screw member screwed into the female screw of the fastened female screw member, a fastening female screw member having a female screw is screwed into the other end portion opposite to the one end portion on the screwing side,
The fastening female screw member, and a pressing member having a pressing surface overlapping in the axial direction on the inner side of the inscribed circle of the female screw of the fastening female screw member, the shaft in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member. Connected in the direction,
Abutting the end surface of the other end of the female screw member to be fastened and the pressing surface;
Thereafter, by applying a rotational torque to the pressing member and rotating the pressing member and the fastening female screw member in the circumferential direction of the fastening female screw member, the fastening male screw member in contact with the pressing surface is provided. A rotational torque is applied to the end face of the end portion by a frictional force, and the fastened male screw member is taken out from the fastened female screw member.

  According to the present invention, even if a fastened male screw member having a low strength is used, the fastened male screw member can be taken out from the fastened female screw member with almost no damage to the fastened male screw member.

  According to the screw fastening device and the screw fastening method of the present invention, even if the male screw member to be fastened is weak, the male screw member to be fastened can be strongly tightened without substantially damaging the male screw member to be fastened.

  Further, according to the screw removing method of the present invention, a fastened male screw member can be taken out of the fastened female screw member even if the fastened male screw member has low strength, with almost no damage to the fastened male screw member.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a screw tightening apparatus according to an embodiment of the present invention.

  This screw fastening device includes a cylindrical fastening female screw member 1, an annular pressing member 2 having an L-shape in a half sectional view in the axial direction, and a plurality of bolts 3 as an example of a fastening member. .

  The fastening female screw member 1 has a female screw 11 and a plurality of screw holes 12. The female screw 11 is formed on the inner peripheral surface of the fastening female screw member 1. The plurality of screw holes 12 are formed at one end face 80 in the axial direction of the fastening female screw member 1 at intervals in the circumferential direction. Each screw hole 12 extends in the axial direction of the fastening female screw member 1.

  On the other hand, the pressing member 2 has a disk-shaped portion 21 and a protruding portion 22, and the protruding portion 22 protrudes in the axial direction from the central portion of one end surface of the disk-shaped portion 21 in the axial direction. Yes. The disk-shaped part 21 has a contact / separation end face 24 and a plurality of through holes 29. The contact / separation end surface 24 is annular. The contact / separation end surface 24 is an end surface of the disc-like portion 21 on the protruding portion 22 side in the axial direction. The contact / separation end surface 24 is located radially outward from the protrusion 22. The contact / separation end face 24 overlaps the one end face 80 in the axial direction of the fastening female screw member 1 in the axial direction. On the other hand, each of the through holes 29 extends in the axial direction and opens in the contact / separation end face 24. The plurality of through holes 29 are arranged at intervals in the circumferential direction of the disk-shaped portion 21. The number of the through holes 29 matches the number of the screw holes 12 of the fastening female screw member 1 and the number of the bolts 3.

  In a state where the axial center of the fastening female screw member 1 and the axial center of the disk-like portion 21 are aligned, the radial position of the screw hole 12 of the fastening female screw member 1 is the through hole of the disk-like portion 21. 29 substantially coincides with the radial position.

  The protrusion 22 has a pressing surface 25 that forms the tip of the protrusion. After each bolt 3 is inserted into the through hole 29 of the disk-shaped part 21, the tip of each bolt 3 is screwed into the screw hole 12 of the fastening female screw member 1, and the contact / separation end surface of the disk-shaped part 21 is engaged. 24 is brought into contact with the one end surface 80 of the fastening female screw member 1 and tightened to fix the pressing member 2 to the fastening female screw member 1.

  In the fixed state of the fastening female screw member 1 and the pressing member 2, the one end surface 80 of the fastening female screw member 1 and the contact / separation end surface 24 of the pressing member 2 are in contact with each other, and the head of the bolt 3 has a disk shape. The part 21 is in contact with the end surface opposite to the contact / separation end surface 24.

  FIG. 1 shows a screw tightening apparatus in the middle of fixing the fastening female screw member 1 to a pressing member 2 with a bolt 3. The number of bolts 3 used to fix the fastening female screw member 1 to the pressing member 2 is at least 1 or more, preferably 2 or more, but 3 or more bolts 3 are used. It is more preferable that the above bolts 3 are arranged at equal intervals in the circumferential direction.

  In a state where the one end surface 80 of the fastening female screw member 1 and the contact / separation end surface 24 of the pressing member 2 are in contact with each other, the pressing surface 25 of the protruding portion 22 of the pressing member 2 is radially directed to the fastening female screw member 1. It overlaps with. In other words, in a state where the one end surface 80 of the fastening female screw member 1 and the contact / separation end surface 24 of the pressing member 2 are in contact with each other, the pressing surface 25 of the protruding portion 22 of the pressing member 2 is connected to the fastening female screw member 1. It is located in the through hole having the female screw 11. Further, in a state where the fastening female screw member 1 and the pressing member 2 are fixed by the bolt 3, the protruding portion 22 of the pressing member 2 is positioned at a radial interval with respect to the fastening female screw member 1. .

  FIG. 2 is a schematic cross-sectional view showing an example of a fastened male screw member 40 that can be fastened by the screw fastening device and a fastened female screw member 41 into which the fastened male screw member 40 is fastened.

  As shown in FIG. 2, in this example, the fastened male screw member 40 is an annular member and has a male screw 50 on the outer peripheral surface. The fastened female screw member 41 has a bottomed hole, and the inner peripheral surface of the hole has a female screw 60.

  The male screw 50 of the fastened male screw member 40 is screwed into the female screw 60 of the fastened female screw member 41. The fastened male screw member 40 is fastened to the fastened female screw member 41 until the tip 45 of the fastened male screw member 40 contacts the bottom 46 of the bottomed hole of the fastened female screw member 41.

  FIG. 3 and FIG. 4 are schematic views showing the fastened male screw member 40 in the middle of being fastened to the fastened female screw member 41 by the screw fastening device.

  Hereinafter, an example of a procedure for fastening the fastened male screw member 40 to the fastened female screw member 41 with the screw fastening device will be described.

  First, the screw fastening device is assembled. Specifically, the bolt 3 is tightened into the screw hole 12 of the fastening female screw member 1 until the one end face 80 of the fastening female screw member 1 and the contact / separation end face 24 of the pressing member 2 abut, and the pressing member 2 is fixed to the fastening female screw member 1. In this fixed state, the head of the bolt 3 is in contact with the axial end surface of the pressing member 2.

  Next, the male screw 50 of the fastened male screw member 40 is moved to the female screw 11 of the fastening female screw member 1 of the screw fastening device until the end face 64 opposite to the screwed side of the fastened male screw member 40 contacts the pressing surface 25. Screw together. Subsequently, the male screw 50 on the distal end side of the fastened male screw member 40 is engaged with the male screw 60 in the bottomed hole of the fastened female screw member 41.

  Subsequently, as shown in FIG. 3, the disc-shaped portion 21 of the pressing member 2 is rotated by applying torque by hand in the direction indicated by the arrow A in FIG. Torque is applied in the direction indicated by arrow A to the end face 64 of the fastened male screw member 40 that is in contact with 25 by a static frictional force. Then, by this torque, the fastened male screw member 40 is rotated in the direction of arrow A until the tip 45 of the fastened male screw member 40 contacts the bottom 46 of the bottomed hole of the fastened female screw member 41. The fastened male screw member 40 is screwed into the fastened female screw member 41. This state is shown in FIG.

  Further, a wrench or the like is attached to the disk-shaped part 21 of the pressing member 2 to give a stronger rotational torque to the disk-shaped part 21 of the pressing member 2 in the direction indicated by the arrow A through the wrench by hand. Then, a rotational torque is applied from the pressing surface 25 to the end surface 64 of the fastened male screw member 40 that is in contact with the pressing surface 25 in the direction indicated by the arrow A by a static frictional force so that the screw fastening device is fastened. The fastened male screw member 40 is fastened to the fastened female screw member 41.

  As a result, as shown in FIG. 5 (b), the flank 55 on the other side in the axial direction of the thread of the male screw 50 of the male screw member 40 to be fastened is pressed by the tip 45 and the bottom 46 of the bottomed hole. The flank 65 on one side of the axial direction of the thread of the female screw 60 of the female screw member 41 to be fastened is urged in the axial direction, and the male screw member to be fastened is pressed by the pressing surface 25 and the end surface 64. The flank 56 on one side in the axial direction of the thread of the 40 male screw 50 and the flank 16 on the other side in the axial direction of the thread of the female thread 11 of the fastening female screw member 1 of the screw fastening device are urged in the axial direction. It becomes a state.

  Thereafter, the bolt 3 is rotated in the direction indicated by the arrow B in FIG. 4, and the bolt 3 is taken out from the screw hole 12 of the fastening female screw member 1 to some extent, and as shown in FIG. 4, the contacting / separating end surface 24 of the pressing member 2. And the disc-shaped portion side end surface 80 of the fastening female screw member 1 are separated from each other, and the pressing of the pressing surface 25 of the pressing member 2 and the end surface 64 of the fastening male screw member 40 on the protruding portion 22 side is loosened. In this way, the frictional force between the pressing surface 25 of the pressing member 2 and the end surface 64 on the pressing member 2 side of the fastened male screw member 40 is blocked. As a result, as shown in FIG. 5C, the axial direction of the thread 55 of the female screw 60 of the fastened female screw member 41 and the flank 55 on the other side in the axial direction of the male screw 50 of the fastened male screw member 40. The one side flank 65 is maintained in an axially biased state, and the pressing of the pressing surface 25 and the end surface 64 is loosened, so that the screw thread of the male screw 50 of the fastened male screw member 40 in the axial direction is reduced. The flanks 55 and 56 on both sides and the flanks 15 and 16 on both sides in the axial direction of the thread of the female screw 11 of the fastening female screw member 1 of the screw fastening device are not urged in the axial direction.

  Finally, a torque is applied to the disk-like portion 21 of the pressing member 2 in the direction indicated by the arrow C in FIG. The fastening female screw member 1 is removed from the fastened male screw member 40 by rotating in the direction indicated by C, the screw fastening device is removed from the fastened male screw member 40, and the fastened male screw member 40 is connected to the fastened female screw member 41. Complete tightening.

  After the frictional force between the pressing surface 25 of the pressing member 2 and the end surface 64 on the pressing member 2 side of the fastened male screw member 40 is interrupted, the male screw of the fastened male screw member 40 is the same as that of the fastening female screw member 1. It is in a state where it is simply hanging on the female screw. As shown in FIG. 5 (c), flanks 55 and 56 on both sides in the axial direction of the screw thread of the male screw 50 of the fastened male screw member 40, and the screw thread axis of the female screw 11 of the fastening female screw member 1 of the screw tightening device. In this state, the flanks 15 and 16 on both sides in the direction are not biased in the axial direction. Therefore, the fastened male screw member 40 can be easily removed from the fastened female screw member 1 only by applying a very small rotational torque.

  On the other hand, the fastened male screw member 40 fastened to the fastened female screw member 41 can be removed from the fastened female screw member 41 as follows, for example.

  First, the fastening female screw member 1 and the pressing member 2 are connected to each other in the axial direction by a bolt 3 in a state in which the fastening female screw member 1 cannot rotate relative to the circumferential direction of the fastening female screw member 1 to assemble a screw fastening device. Here, in the assembled screw fastening device, one end surface 80 in the axial direction of the fastening female screw member 1 is opposed to the contact / separation end surface 24 of the pressing member 2 with a gap, and the head of the bolt 3 is It is in contact with the disk-shaped part 21.

  Next, the female screw 11 of the fastening female screw member 1 of the screw fastening device is screwed into the male screw 50 of the fastened male screw member 40, and the pressing surface 25 of the pressing member 2 is opposite to the screwed side of the fastened male screw member 40. Further, the bolt 3 is firmly tightened to the fastening female screw member 1 in contact with the end face 64 on the side, and a large static frictional force is generated between the pressing surface 25 and the end face 64 of the fastened male screw member 40. Accordingly, as shown in FIG. 6A, the flank 56 on one side in the axial direction of the thread of the male screw 50 of the fastened male screw member 40 and the screw fastening device are pressed by the pressing surface 25 and the end surface 64. The flank 16 on the other side in the axial direction of the thread of the female thread 11 of the fastening female thread member 1 is urged in the axial direction.

  Subsequently, a wrench or the like is attached to the disc-like portion 21 of the pressing member 2 and the disc-like portion 21 of the pressing member 2 is manually attached to the disc-like portion 21 in the direction opposite to the direction indicated by the arrow A in FIG. Thus, rotational torque is applied from the pressing surface 25 to the end surface 64 of the fastened male screw member 40 that is in contact with the pressing surface 25 by a static frictional force in a direction opposite to the direction indicated by the arrow A. Then, the fastened male screw member 40 is loosened with respect to the fastened female screw member 41.

  As a result, as shown in FIG. 6 (b), the pressing of the tip 45 and the bottom 46 of the bottomed hole is loosened, whereby both sides in the axial direction of the thread of the male thread 50 of the male thread member 40 to be fastened. The flank 55, 56 and the flank 65, 66 on both sides in the axial direction of the thread of the female screw 60 of the fastened female screw member 41 are not urged in the axial direction, and the pressing surface 25 and the end surface 64 By pressing, a flank 56 on one side in the axial direction of the thread of the male screw 50 of the fastened male screw member 40 and a flank 16 on the other side in the axial direction of the thread of the female screw 11 of the fastening female screw member 1 of the screw fastening device are formed. Maintain the state of being biased in the axial direction. Then, the disk-like portion 21 of the pressing member 2 is rotated by applying torque by hand in the direction opposite to the direction indicated by the arrow A, and the fastened male screw member 40 is taken out from the fastened female screw member 41.

  Finally, the bolt 3 of the screw tightening device is loosened so that the pressing surface 25 of the pressing member 2 and the end surface 64 of the fastened male screw member 40 are separated, and the pressing surface 25 and the end surface 64 of the fastened male screw member 40 are separated. Cut off frictional force. Accordingly, as shown in FIG. 6C, the flank 55 on both sides in the axial direction of the thread of the male screw 50 of the male screw member 40 to be fastened by loosening the pressing of the pressing surface 25 and the end surface 64, 56 and the flanks 15 and 16 on both sides in the axial direction of the thread of the female screw 11 of the fastening female screw member 1 of the screw fastening device are not biased in the axial direction. Thereafter, the fastened male screw member 40 is removed from the fastened female screw member 1 to complete the removal of the fastened male screw member 40 from the fastened female screw member 41.

  According to the screw tightening device of the above embodiment, the fastened male screw member 40 is caused by the static frictional force between the end surface 64 opposite to the tightening side of the fastened male screw member 40 and the pressing surface 25 of the pressing member 2. It is the structure which provides rotational torque to this, Comprising: It is not the structure which gives a local large rotational torque to the groove | channel formed in the end surface of the to-be-fastened male screw member by a driver like the prior art example, Since the rotational torque is applied to the entire surface of the end face 64 substantially uniformly and globally, the end face 64 of the fastened male screw member 40 is deformed or damaged by the rotational torque being given to the fastened male screw member 40. Can be almost completely prevented.

  Moreover, according to the screw fastening apparatus of the said embodiment, since a rotational torque can be provided to the whole end surface 64 of the to-be-fastened male screw member 40, a big rotational torque can be given to the to-be-fastened male screw member 40. Therefore, the fastened male screw member 40 can be strongly tightened.

  Further, according to the screw tightening device of the above-described embodiment, the assembled state of the screw tightening device, that is, the end surface 80 on the disc-like portion 21 side of the fastening female screw member 1 and the pressing surface 24 of the pressing member 2 abut. In the state where the head of the bolt 3 is in contact with the end surface on the side opposite to the contact / separation end surface 24 side of the disc-shaped portion 21, the pressing surface 25 of the protruding portion 22 overlaps the fastening female screw member 1 in the radial direction. Therefore, when the fastened male screw member 40 is fastened to the fastened female screw member 41, the axial dimension of the portion of the fastened male screw member 40 that protrudes from the fastened female screw member 41 can be reduced.

  In this screw tightening device, the end face 80 of the fastening female screw member 1 on the disk-shaped portion 21 side and the pressing surface 24 of the pressing member 2 come into contact with each other, and the head of the bolt 3 contacts and separates the disk-shaped portion 21. In the state where the end face 24 is in contact with the end face opposite to the end face 24 side, the axial distance between the end face on the opposite side to the disk-shaped portion 21 side of the fastening female screw member 1 and the pressing face 25 of the pressing member 2 is set. After the tightened male screw member 40 is tightened by the corresponding length, the fastened male screw member 40 protrudes from the fastened female screw member 41.

  Here, the axial distance, that is, the distance of the protruding portion of the fastened male screw member 40 suffices if there is an axial distance corresponding to one or two threads of the fastening female screw member 1. is there. In this case, the protrusion of the fastened male screw member 40 from the fastened female screw member 41 is very small.

  Moreover, according to the screw fastening apparatus of the said embodiment, the fastening female screw member 1 and the press member 2 are mutually relative to the circumferential direction of the fastening female screw member 1 by the some volt | bolt 3 located in the circumferential direction at intervals. Since it is connected in the axial direction in a non-rotatable state, it is possible to prevent the relative position of the pressing member 2 with respect to the fastening female screw member 1 from changing while the fastened male screw member 40 is being tightened. Therefore, a large rotational torque can be continuously applied to the fastened male screw member 40 during screw tightening.

  In addition, according to the screw fastening method of the above embodiment, the rotational torque can be applied to the entire surface of the end face 64 of the fastened male screw member 40 substantially evenly, and the end face of the screw member as in the conventional example. A large rotational torque is not applied to the grooves formed in the. Accordingly, the end face 64 of the fastened male screw member 40 is not deformed or damaged during the tightening of the fastened male screw member 40, so that the product cannot be shipped.

  Moreover, according to the screw fastening method of the said embodiment, since a rotational torque can be provided to the whole end surface 64 of the to-be-fastened male screw member 40, a big rotational torque can be given to the to-be-fastened male screw member 40. The to-be-fastened male screw member 40 can be tightened strongly.

  Further, according to the screw fastening method of the above embodiment, the fastened male screw member 40 and the screw fastening device are separated after the fastened male screw member 40 is separated from the pressing surface 25 of the pressing member 2. During the separation of the fastened male screw member 40 and the screw tightening device, the rotational torque that the fastened male screw member 40 that has been tightened is pulled out from the fastened female screw member 41 may be applied to the fastened male screw member 40. Almost no.

  Further, according to the screw removing method of the above embodiment, the fastened male screw member 40 can be taken out from the fastened female screw member 41 with almost no damage.

  In addition, in the screw fastening apparatus of the said embodiment, although the pressing member 2 had the protrusion part 22 which protrudes from the disk-shaped part 21, in this invention, a pressing member is a part which protrudes from a disk-shaped part. The pressing member is a pressing surface located radially inward of the cylindrical fastening female screw member in the radial direction (the pressing surface overlaps the fastening female screw member in the radial direction). As long as it does not overlap in the radial direction.

  In the screw tightening device of the above embodiment, the fastening member has a function of making the fastening female screw member 1 and the pressing member 2 non-rotatable relative to each other in the circumferential direction of the fastening female screw member 1, and the fastening female screw member 1 and the pressing member 2. And the bolt 3 having both functions of connecting the two in the axial direction. However, in this invention, the fastening member has a function of making the fastening female screw member and the pressing member non-rotatable relative to each other in the circumferential direction of the fastening female screw member, and on the other hand, a function of connecting the fastening female screw member and the pressing member in the axial direction. And the fastening member does not have a function of making the fastening female screw member and the pressing member non-rotatable relative to each other in the circumferential direction of the fastening female screw member, while the fastening female screw member and the pressing member are arranged in the axial direction. You may consist of the 2nd member which has the function to connect. And, for example, in this case, the first member is a bolt or pin having no head, or a first convex portion formed on, for example, the outer diameter side of a fastening female screw member and a disk-shaped portion, for example, The structure provided with the 2nd convex part which can contact the 1st convex part and the circumferential direction on the diameter side may be sufficient. The second member may be a clamp.

  Moreover, in the screw fastening apparatus of the said embodiment, although the said press member 2 was an annular member and the disk-shaped part 21 had the cylindrical structure, in this invention, the press member 2 is an annular member. Not necessarily. For example, the pressing member has a first cylindrical portion and a second cylindrical portion having a smaller diameter than the first cylindrical portion, and the second cylindrical portion extends in the axial direction from the central portion of one end surface of the first cylindrical portion. The structure which protrudes, the end surface by the side of the 2nd cylinder part of a 1st cylinder part is a contact / separation end surface, and the end surface of the front-end | tip of a 2nd cylinder part may be a press surface may be sufficient.

  Moreover, in the screw fastening apparatus of the said embodiment, while the fastening internal thread member 1 was a right-hand thread, the volt | bolt 3 was a right-hand thread. That is, when the fastening female screw member 1 is rotated in the direction indicated by the arrow A in FIG. 3, that is, clockwise, the fastened male screw member 40 can be fastened, and the bolt 3 as a fastening member is shown in FIG. When rotated in the direction indicated by B, that is, counterclockwise, the screw 3 can be loosened into the fastening female screw member 1. However, in the present invention, both the fastening female screw member and the bolt as the fastening member may be left-handed, and one of the fastening female screw member and the bolt as the fastening member is a right-handed screw and the other is a left-handed screw. May be.

  When one of the fastening female screw member 1 and the bolt as the fastening member is a right-hand screw and the other is a left-hand screw, the rotational torque applied to the fastening female screw member when the bolt is loosened causes the fastening male screw member to Since it is the torque in the direction of tightening to the fastened female screw member, when removing the screw tightening device from the fastened male screw member, if the bolt is loosened by mistake, it may be rotated around the axis of the fastening female screw member by mistake. It is preferable that the fastened male screw member that is fastened is not detached from the fastened female screw member.

  Even when both the fastening female screw member and the bolt as the fastening member are right-handed screws, and when both the fastening female screw member and the bolt as the fastening member are left-handed screws, the rotation shaft of the screw of the fastening female screw member And the rotating shaft of the bolt as the fastening member are different from each other. Therefore, the torque acting on the fastened male screw member via the pressing member by the rotational torque that loosens the bolt, that is, the tightened fastened male screw member is covered. There is almost no torque that comes off the fastening female screw member, and the fastened male screw member fastened by this torque does not come off from the fastened female screw member.

  Further, in the screw tightening device of the above embodiment, one end surface 80 in the axial direction of the fastening female screw member 1 and the contact / separation end surface 24 of the pressing member 2 are in contact with each other in the assembled state of the screw tightening device. In the invention, in the assembled state of the screw tightening device, the end surface on the contact / separation end surface side of the pressing member in the axial direction of the fastening female screw member and the contact / separation end surface of the pressing member do not need to be in contact with each other. In the assembled state, the screw tightening device is capable of pressing the fastening female screw member in the axial direction of the fastening female screw member as long as the fastening female screw member and the pressing member can be connected in the axial direction in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member. The end surface on the contact / separation end surface side of the member does not need to be in contact with the contact / separation end surface of the pressing member.

  More specifically, by adjusting the tightening amount of the bolt as the fastening member, the gap between the end surface on the side of the pressing member in the axial direction of the fastening female screw member and the contact and separation end surface of the pressing member is appropriately adjusted. By doing this, the axial distance between the end surface of the fastening female screw member opposite to the contact / separation end surface of the pressing member and the pressing surface of the pressing member can be adjusted. If it does in this way, the length of the part which protrudes from the to-be-fastened female screw member can be adjusted easily and correctly in the to-be-fastened male screw member in the tightening state to the to-be-fastened female screw member of the to-be-fastened male screw member.

  Moreover, in the screw fastening method of the above embodiment, after assembling the screw fastening device, the fastened male screw member 40 is screwed into the fastening female screw member 1 of the screw fastening device. After engaging the pressing member with the bolt to some extent, the screw member may be screwed into the fastening female screw member, and then the bolt may be tightened to the end, and the pressing member and the screw member may be frictionally engaged. In short, the order and details of the process are as long as the male screw member to be fastened is fastened to the female screw member to be fastened by the rotational torque applied to the male screw member to be fastened by the frictional force from the pressing surface of the pressing member. It can be anything.

  Further, in the screw fastening method of the above embodiment, the screw of the male screw 50 of the male screw member 40 to be fastened is pressed by the tip 45 of the male screw member 40 to be fastened and the bottom 46 of the bottomed hole of the female screw member 41 to be fastened. The flank 55 on the other side in the axial direction of the mountain and the flank 65 on one side in the axial direction of the female thread 60 of the female screw 60 of the fastened female screw member 41 are biased in the axial direction, thereby The fastening female screw member 41 was strongly tightened and fastened. However, in the present invention, a stepped portion is formed in the fastening male screw member, and the end surface of the stepped portion of the fastening male screw member is pressed against the end surface on the other side in the axial direction of the fastening female screw member 41 so that the male screw of the fastened male screw member The flank 55 on the other side in the axial direction of the 50 threads and the flank 65 on the one side in the axial direction of the thread of the female thread 60 of the female thread member 41 to be fastened may be urged in the axial direction. In the present invention, although not preferred, the fastened female screw member 41 and the fastened male screw member 40 are connected by engaging the incomplete thread portion of the fastened female screw member 41 with the male screw 50 of the fastened female screw member 40. You may fasten.

  FIG. 7 is a view showing an example of the use of the screw tightening device of the present invention, and is a cross-sectional view showing a pin type cage in which a female screw member to be fastened is tightened by the screw tightening device of the present invention. is there.

  In FIG. 7, 100 indicates a screw tightening device, 130 indicates a cylindrical fastening female screw member, 131 indicates a pressing member, 132 indicates a bolt, and 150 indicates a pin type retainer.

  The pin type retainer 150 includes a first ring 110, a second ring 112 as a fastening female screw member, a plurality of pins 111, a first taper member 113 having a split pin structure, and a second taper member 114. The male screw member 101 to be fastened.

  One end of each pin 111 is screwed into the screw hole of the first ring 110. The cylindrical outer peripheral surface of the first taper member 113 is in contact with the cylindrical inner peripheral surface of the through hole of the second ring 112, and the conical outer periphery of the second taper member 114 is in contact with the conical inner peripheral surface of the first taper member 113. The surfaces are in contact. The cylindrical outer peripheral surface of the other end of the pin 111 is in contact with the cylindrical inner peripheral surface of the second taper member 114.

  The end surface on the small diameter side of the inner circumferential surface of the first taper member 113 is in contact with a step portion in the through hole of the second ring 112. The end surface of the second male taper member 101 opposite to the pressing member 131 is in contact with the large-diameter end surface of the outer circumferential surface of the second taper member 114. In this pin type retainer, the second taper member 114 is fastened with the male screw member 101 to be fastened, the conical outer peripheral surface of the second taper member 114 is pressed against the conical inner peripheral surface of the first taper member 113, The outer diameter of the cylindrical outer peripheral surface of the taper member 113 is increased, the cylindrical outer peripheral surface of the first taper member 113 is pressed against the cylindrical inner peripheral surface of the through hole of the second ring 112, and the other end of the pin 111 Is fixed to the second ring 112, and the fixing rigidity between the other end of the pin 111 and the second ring 112 is adjusted to a predetermined rigidity. Then, after the tightened male screw member 101 is tightened, the screw tightening device is removed, and welding is performed on the opposite side of the second ring 112 to the first ring 110, thereby completing the manufacture of the pin type cage. It is like that.

  As shown in FIG. 7, a female screw is formed on a portion of the through hole of the second ring 112 opposite to the first ring 110 side, and is screwed into the male screw on the outer peripheral surface of the fastened male screw member 101. It is supposed to be.

  In the case of a screw member having low rigidity, such as a cylindrical fastened male screw member 101 used in the pin type cage shown in this example, the fastened male screw member 101 is greatly damaged by fastening using a conventional screwdriver. In response, the pin type cage as a product may not be usable. However, if the fastened male screw member 101 is tightened using the screw fastening device of the present invention, the fastened male screw member 101 is hardly damaged by deformation or the like, and the fastened male screw member 101 has a large rotational torque. The fastening male screw member 101 can be tightened.

  In the above-described embodiment, the cylindrical fastened male screw members 40 and 101 are fastened by the screw fastening device of the present invention. However, the to-be-fastened male screw member tightened by the screw tightening device of the present invention may not be cylindrical, and there is no limitation on the to-be-fastened male screw member tightened by the screw tightening device of the present invention. It goes without saying that any tightened male screw member can be tightened with the screw tightening device. For example, the screw fastening device of the present invention can be suitably used for fastening an anchor screw used at a construction site.

It is a schematic diagram which shows the screw fastening apparatus of one Embodiment of this invention. It is a schematic cross-sectional view showing an example of a fastened male screw member that can be tightened by the screw tightening device and a fastened female screw member into which the fastened male screw member is fastened. It is a schematic diagram which shows the to-be-fastened male screw member in the middle of being fixed to the to-be-fastened female screw member by the said screw fastening apparatus. It is a schematic diagram which shows the to-be-fastened male screw member in the middle of being fixed to the to-be-fastened female screw member by the said screw fastening apparatus. It is a figure explaining an example of the procedure which fastens a to-be-fastened male screw member to a to-be-fastened female screw member with the said screw fastening apparatus. It is a figure explaining an example of the procedure which removes the to-be-fastened male screw member fastened to the to-be-fastened female screw member from the to-be-fastened female screw member. It is sectional drawing which shows the pin type holder in the middle of being fastened the to-be-fastened female screw member by the screw fastening apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,130 Fastening female screw member 2,131 Pressing member 3,132 Bolt 11 Female screw of fastening female screw member 12 Screw hole 21 Disk-shaped part 22 Projection part 24 Contacting / separating end face 25 Pressing surface 29 Through hole 40,101 Fastened male screw member 41 Fastened female screw member 50 Male screw of fastened male screw member 60 Female screw of fastened female screw member 64 End surface of the fastened male screw member on the pressing member side 80 End surface of the fastening female screw member on the contacting / separating end surface side 100 Screw fastening device 112 Second ring

Claims (6)

An annular fastening female screw member having a female screw on the inner periphery;
A contacting / separating end surface that overlaps with one end surface in the axial direction of the fastening female screw member, and a pressing surface that is on the same side as the contacting / separating end surface and overlaps the axial direction inside an inscribed circle of the female screw A pressing member having
The fastening female screw member and the pressing member can be connected in the axial direction in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member, and the relative positions in the axial direction of the fastening female screw member and the pressing member And a fastening member that can be varied. The screw tightening device according to claim 1,
The pressing member is
A disc-shaped portion having the contact and separation end surfaces;
A screw fastening device comprising: a projecting portion projecting in the axial direction from the contacting / separating end surface side of the disc-shaped portion and having a pressing surface. The screw tightening device according to claim 2,
The one end surface of the fastening female screw member has a plurality of screw holes,
The disk-shaped part has a plurality of through-holes that are open at the contact and separation end surfaces and are spaced from each other in the circumferential direction of the disk-shaped part,
The fastening member is a plurality of bolts,
In a state where the fastening female screw member and the pressing member are connected in the axial direction, the bolts are inserted into the through-holes of the disk-shaped portion and are inserted into the screw holes of the one end surface. A screw fastening device characterized by being screwed. One end portion of a fastened male screw member having a male screw is screwed into a fastened female screw member having a female screw,
Screw the other end of the fastened male screw member into the fastening female screw member having the female screw,
The fastening female screw member, and a pressing member having a pressing surface overlapping in the axial direction on the inner side of the inscribed circle of the female screw of the fastening female screw member, the shaft in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member. Connected in the direction,
The pressing surface and the other end of the fastened male screw member are connected in the axial direction in a state in which the pressing member and the fastening female screw member are not rotatable relative to each other in the circumferential direction of the fastening female screw. Contact the end face of the part,
Thereafter, by applying a rotational torque to the pressing member and rotating the fastening female screw member and the pressing member in a circumferential direction of the fastening female screw member, the fastening male screw member in contact with the pressing surface is provided. A screw fastening method, wherein a rotational torque is applied to an end face of the other end portion by a frictional force, and the fastened male screw member is fastened to the fastened female screw member. The screw fastening method according to claim 4,
After fastening the fastened male screw member to the fastened female screw member,
Separating the end surface of the other end of the fastened male screw member and the pressing surface;
Thereafter, the screwed male screw member and the fastening female screw member are released, and the fastened male screw member is separated from the fastening female screw member and the pressing member. In the fastened male screw member screwed into the female screw of the fastened female screw member, a fastening female screw member having a female screw is screwed into the other end portion opposite to the one end portion on the screwing side,
The fastening female screw member, and a pressing member having a pressing surface overlapping in the axial direction on the inner side of the inscribed circle of the female screw of the fastening female screw member, the shaft in a state in which they cannot rotate relative to each other in the circumferential direction of the fastening female screw member. Connected in the direction,
Abutting the end surface of the other end of the female screw member to be fastened and the pressing surface;
Thereafter, by applying a rotational torque to the pressing member and rotating the pressing member and the fastening female screw member in the circumferential direction of the fastening female screw member, the fastening male screw member in contact with the pressing surface is provided. A method for removing a screw, wherein a rotational torque is applied to an end face of an end portion by a frictional force, and the fastened male screw member is taken out from the fastened female screw member.

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