JP5455209B2 - Multi-row pin cylinder lock - Google Patents

Description

  The present invention relates to a multi-row pin cylinder as a lock used when locking an opening / closing body such as a door.

  An inner cylinder is rotatably provided inside an outer cylinder fixed in the cylinder body, and a plurality of pin holes extending radially in both the outer cylinder and the inner cylinder are arranged at equal intervals with a linear arrangement in the axial direction. By forming a tumbler pin, a driver pin, and a spring that urges both pins radially inward in each pin hole, and inserting an operation key into the key hole formed in the center of the inner cylinder Align the shear line of the tumbler pin and driver pin with the fitting surface of the outer cylinder and inner cylinder, rotate the inner cylinder by rotating the operation key, and lock the plate-shaped locking cam connected to the inner cylinder A pin cylinder rotated between a position and an unlocking position is widely used as a lock for an opening / closing body such as a door.

  In the above-described pin cylinder, there are a single-row pin cylinder in which the pin hole row is a single row and a multi-row pin cylinder in which the pin hole rows are provided at intervals in the circumferential direction.

  Here, the single-row pin cylinder has a problem in safety because the number of key differences cannot be increased. Therefore, in recent years, in order to ensure safety, a multi-row type pin cylinder has been frequently used as a lock for an opening / closing member such as a door in a trunk room of an apartment.

  By the way, in the multi-row pin cylinder, the pin holes are displaced in the axial direction in the two rows of pin hole rows, so that the inner cylinder is rotated by the rotation of the operation key inserted into the key hole. When the locking / unlocking cam is rotated to the unlocking position, the tumbler pin remaining in the pin hole of the inner cylinder is prevented from moving outward by the inner diameter surface of the outer cylinder. The operation key cannot be pulled out in the locked state.

  For this reason, conventionally, after the cam is set in the unlocked state, the cam is returned to the locked state and the operation key is pulled out, which causes a problem in operability. Further, since the cam is always held in a locked state by pulling out the operation key, there is a problem that it is impossible to create a state in which the opening / closing body can be freely opened and closed.

  An object of the present invention is to provide a multi-row pin cylinder in which an operation key can be pulled out at each of an unlocking position and a locking position of a cam for locking and unlocking an opening / closing member such as a door. is there.

  In order to solve the above-mentioned problems, in the present invention, a cylinder body, an outer cylinder fitted into the cylinder body and fixed to the cylinder body, and a rotatable fitting inside the outer cylinder An inner cylinder is formed, and pin holes extending radially in both the outer cylinder and the inner cylinder are formed at equal intervals in a linear arrangement in the axial direction. Provided in double rows at intervals in the circumferential direction so as to be displaced in the axial direction, tumbler pins, driver pins, and springs that urge both pins radially inward in each pin hole, By inserting the operation key into the key hole formed in the inner cylinder, the shear line of the tumbler pin and the driver pin is matched with the fitting surface of the outer cylinder and the inner cylinder, and the inner cylinder is rotated by the rotation of the operation key. Plate-like application connected to the inner cylinder In a multi-row pin cylinder in which the cam is rotated between the locking position and the unlocking position, the rotation of the inner cylinder that rotates integrally with the operation key is transmitted to the cam in the rear end of the cylinder body. The torque transmission mechanism is incorporated, and the torque transmission mechanism is provided with a rotational play, and the rotational play is sized to correspond to the rotational angle of the locking position and the unlocking position of the cam.

  In the multi-row pin cylinder configured as described above, when the operation key is inserted into the key hole, the shear line of the tumbler pin and driver pin assembled in the pin hole matches the fitting surface of the outer cylinder and the inner cylinder. The tube is in a state where it can rotate freely.

  Therefore, when the operation key is rotated in the locking direction, the rotation of the inner cylinder that rotates integrally with the operation key is transmitted to the cam via the torque transmission mechanism, and the cam rotates toward the locking position.

  When the operation key is rotated toward the unlocking position while the cam is locked, the inner cylinder rotates in the same direction together with the operation key. At this time, since the torque transmission mechanism is provided with play in the rotational direction, the rotation of the inner cylinder is not transmitted to the cam, and the cam is held in the locked state.

  When the operation key is rotated to the unlocking position, the inner cylinder returns to the locking / unlocking position where the pin hole matches the pin hole of the outer cylinder. At this time, since the tumbler pin disposed in the pin hole of the inner cylinder can move toward the pin hole of the outer cylinder, the operation key can be pulled out from the key hole in the locked state of the cam.

  On the other hand, when the operation key is inserted into the key hole in the locked state of the cam, the tumbler pin assembled in the pin hole and the shear line of the driver pin coincide with the fitting surface of the outer cylinder and the inner cylinder, as described above. The inner cylinder can be freely rotated.

  Therefore, when the operation key is rotated in the unlocking direction, the rotation of the inner cylinder that rotates integrally with the operation key is transmitted to the cam via the torque transmission mechanism, and the cam rotates toward the unlocking position.

  When the operation key is rotated toward the locking position in the unlocked state of the cam, the inner cylinder rotates in the same direction together with the operation key. At this time, since the torque transmission mechanism is provided with rotation direction play, the rotation of the inner cylinder is not transmitted to the cam, and the cam is held in the unlocked state.

  When the operation key is rotated to the locking position, the inner cylinder returns to the locking / unlocking position where the pin hole matches the pin hole of the outer cylinder. At this time, since the tumbler pin arranged in the pin hole of the inner cylinder can move toward the pin hole of the outer cylinder, the operation key can be pulled out from the key hole in the unlocked state of the cam.

  As described above, the operation key can be pulled out at any of the locking position and the unlocking position of the cam, and the opening / closing body can be freely opened and closed by pulling out the operation key at the unlocking position of the cam. it can.

  Here, as a torque transmission mechanism for transmitting the rotation of the inner cylinder to the cam, a pin holder having a rear end connected to the cam in a rear end of the cylinder body, and an annular plate fixed to a front end surface of the pin holder In the center of the front end surface of the pin holder, an axial hole having substantially the same diameter as the central hole of the annular plate, and a fan-shaped notch communicating with the opening end of the axial hole are provided. The annular plate is provided with a pair of pin insertion holes at positions facing the both ends in the circumferential direction of the notch, and the axial direction of the pin holder is pushed back by inserting an operation key into the key hole. A slidable torque transmission shaft that moves and a spring that biases the torque transmission shaft toward the inner cylinder are incorporated into the torque transmission shaft in a radial groove formed on the rear end surface of the inner cylinder. Mates slidably A first torque transmission pin and a second torque transmission pin that is fitted into one of the pair of pin insertion holes and is pulled out of the pin insertion hole and retreats into the notch by retreating the torque transmission shaft, It is possible to adopt a configuration in which a play in the rotational direction having a magnitude equal to the rotational angle from the locking position of the cam to the unlocking position is provided between the end faces of the second torque transmission pin facing the circumferential direction of the notch. .

  As described above, in the multi-row pin cylinder according to the present invention, the torque transmission mechanism that transmits the rotation of the inner cylinder to the cam has a rotational play that is equal to the rotation angle from the locking position of the cam to the unlocking position. By forming the cam, the cam for locking / unlocking is formed in the inner cylinder by the rotation operation of the operation key inserted in the key hole in the state where the cam for locking / unlocking is positioned in the locking position and in the state where it is positioned in the unlocking position. The inner cylinder can be rotated to the locking / unlocking position where the pin hole coincides with the pin hole formed in the outer cylinder, and the operation key can be pulled out at each of the locking position and the unlocking position of the cam.

Cross-sectional plan view showing an embodiment of a multi-row pin cylinder according to the present invention FIG. 1 is a cross-sectional plan view of the multi-row pin cylinder shown in FIG. 1 with the operation keys inserted into the key holes. Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Sectional view along line VV in FIG. 1 is an exploded perspective view of the multi-row pin cylinder shown in FIG. (A) thru | or (c) is sectional drawing which shows stepwise the operation which returns only an inner cylinder to an unlocking position after rotating a cam of a locked state to an unlocking position (D) thru | or (f) is sectional drawing which shows stepwise the operation which returns only an inner cylinder to an unlocking position, after rotating a cam of an unlocking state to a locking position

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a multi-row pin cylinder 10 that locks the opening / closing body 3 is attached to an end of the opening / closing body 3 that opens / closes the opening 2 of the opening frame 1.

  The multi-row pin cylinder 10 has a cylinder body 11. The cylinder body 11 is provided with a flange 12 at one end. Moreover, as shown in FIG. 6, the flat surface 13 is formed in the outer periphery opposing position of the cylinder main body 11, and the external thread 14 is formed in the outer periphery of one end part.

  As shown in FIG. 1, the cylinder body 11 is inserted from the front side of the opening / closing body 3 into a rectangular cylinder mounting hole 4 penetrating in the front-rear direction formed at the door end side of the opening / closing body 3. 14 is fixed to the opening / closing body 3 by tightening a tightening nut 15 that is screw-engaged with the opening 14.

  An outer cylinder 16 is fitted into the cylinder body 11, and an inner cylinder 17 is fitted inside the outer cylinder 16.

  A pin hole 18 extending in the radial direction is formed in the outer cylinder 16 and the cylinder body 11, and the outer cylinder 16 is fixed to the cylinder body 11 by a knock pin 19 press-fitted into the pin hole 18.

  The inner cylinder 17 is rotatably supported with respect to the outer cylinder 16, and an outward flange 20 that is abutted against the distal end surface of the outer cylinder 16 is formed at the distal end portion thereof. A retaining ring 21 is attached to the outer periphery of the rear end portion of the inner cylinder 17 protruding outward from the rear end surface of the outer cylinder 16, and the inner cylinder 17 is prevented from being removed by the retaining ring 21 and the outward flange 20. Yes.

  A plurality of pin holes 22 extending in the radial direction are formed in the outer cylinder 16 and the inner cylinder 17 at equal intervals in a linear arrangement in the axial direction, and the linearly arranged pin hole rows are spaced in the circumferential direction. It is formed in a double row. The pin holes 22 are displaced in the axial direction between the double row pin hole rows. In FIG. 1, the positional deviation of the pin holes 22 in the axial direction is set to a half pitch.

  A tumbler pin 23, a driver pin 24, and a spring 25 are incorporated in each pin hole 22 in order from the inner diameter side, and the tumbler pin 23 and the driver pin 24 are placed on the central axis of the inner cylinder 17 by the spring 25. It is biased toward the formed key hole 26.

  As shown in FIG. 2, the shear line, which is an abutting surface between the tumbler pin 23 and the driver pin 24, matches the fitting surface of the outer cylinder 16 and the inner cylinder 17 by inserting the operation key 60 into the key hole 26. In this state, when the operation key 60 is rotated, the inner cylinder 17 rotates together with the operation key 60, and the rotation is performed via the torque transmission mechanism 30 incorporated in the rear end portion of the cylinder body 11. -It is transmitted to the plate-shaped cam 27 for unlocking.

  The cam 27 is disposed outside the rear end surface of the cylinder body 11 and is rotatable about the axis of the inner cylinder 17. As for this cam 27, the position extended in the horizontal direction shown by the solid line in FIG. 5 is the locking position, and at the locking position, as shown in FIG. 3 is prevented from opening.

  Further, the cam 27 has a vertical position extending upward indicated by a chain line in FIG. 5 as an unlocking position, and at the unlocking position, a projecting piece 28 formed on the outer periphery of the end on the swing center side The cam 27 is held in the unlocked position by contact with a stopper piece 29 provided at the lower portion of the rear end surface.

  As shown in FIG. 2, the torque transmission mechanism 30 has a pin holder 31. The pin holder 31 has a configuration in which a small diameter cylindrical portion 33 is provided at the rear end of the large diameter cylindrical portion 32, and an angular shaft portion 34 is provided at the rear end of the small diameter cylindrical portion 33. It is disposed between a pair of retaining rings 35 attached to the inner periphery of the rear end portion, and is rotatably supported by the inner diameter surface of the cylinder body 11.

  The square shaft portion 34 is fitted into a square hole 36 formed in the cam 27, passes through a disk-shaped cam retainer 37 abutted against the end surface of the square shaft portion 34, and is screwed into the square shaft portion 34. The pin holder 31 is fixed to the cam 27 by tightening the screw 38.

  As shown in FIGS. 2 and 4, the large-diameter cylindrical portion 32 is provided with a pair of lateral holes 39 extending in the radial direction from the outer peripheral surface at intervals of 180 ° in the circumferential direction. A ball 40 and a spring 41 that biases the ball 40 outward in the radial direction are incorporated.

  On the other hand, on the inner periphery of the rear end portion of the cylinder body 11, engagement grooves 42 having an arcuate cross section extending in the axial direction are formed at intervals of 90 ° in the circumferential direction. By engagement, the cam 27 is temporarily fixed at both the locked position and the unlocked position.

  As shown in FIGS. 2 and 3, the pin holder 31 has an axial hole 43 extending in the axial direction from the center of the tip surface, and a pair of opposingly arranged fan-shaped holes communicating with the opening end of the axial hole 43. A notch 44 is formed, and the axial hole 43 has substantially the same diameter as the central hole 46 of the annular plate 45 fixed to the tip surface of the pin holder 31.

  As shown in FIGS. 2 and 6, four pin insertion holes 47 extending in the radial direction from the inner diameter surface of the center hole 46 are formed in the annular plate 45 at intervals of 90 °.

  As shown in FIG. 2, the rear end portion of the torque transmission shaft 48 is slidably supported in the axial hole 43 of the pin holder 31 and the center hole 46 of the annular plate 45 communicating therewith.

  The torque transmission shaft 48 has a small-diameter shaft portion 49 at the tip portion, and the tip portion of the small-diameter shaft portion 49 is slidable in the key hole 26 of the inner cylinder 17.

  The torque transmission shaft 48 is provided with a first torque transmission pin 51 so as to penetrate the small diameter shaft portion 49 in the radial direction, and the large diameter shaft portion continuous with the rear end of the small diameter shaft portion 49 is disposed in the radial direction. The second torque transmission pin 52 is provided so as to penetrate the shaft.

  As shown in FIG. 1, the torque transmission shaft 48 is urged toward the inner cylinder 17 by a spring 53 incorporated in the closed end portion of the axial hole 43, and in the urged state, the first torque transmission pin 51. Is slidably disposed in a radial groove 54 formed in the rear end surface of the inner cylinder 17 and is in contact with the closed end of the radial groove 54. On the other hand, the second torque transmission pin 52 is disposed in the pin insertion hole 47 of the annular plate 45.

  Further, the torque transmission shaft 48 is pushed back by inserting the operation key 60 into the key hole 26 of the inner cylinder 17. Due to the retreat, the second torque transmission pin 52 exits the pin insertion hole 47 and enters the notch 44 as shown in FIGS.

  In the state where the second torque transmission pin 52 is located in the notch 44, a rotational play is provided between the second torque transmission pin 52 and both end faces opposed to each other in the circumferential direction of the notch 44. In FIG. 3, δ indicates a rotational play amount, and the rotational play amount δ is equal to the rotation angle from the locking position of the cam 27 to the unlocking position.

  The multi-row pin cylinder 10 shown in the embodiment has the above structure, and FIG. 1 shows a state where the cam 27 locks the opening / closing body 3. Further, the multi-row pin cylinder 10 shows a locked state in which the driver pin 24 is disposed at a position straddling the pin hole 22 on the outer cylinder 16 side and the pin hole 22 on the inner cylinder 17 side. At this time, the first torque transmission pin 51 of the torque transmission shaft 48 is in contact with the closed end surface of the radial groove 54 of the inner cylinder 17, and the second torque transmission pin 52 is in the pin insertion hole 47 of the annular plate 45. positioned.

  When unlocking the opening / closing body 3, the operation key 60 is inserted into the key hole 26 of the inner cylinder 17, and the operation key 60 is rotated in the unlocking direction.

  Now, when the operation key 60 is inserted into the key hole 26 of the inner cylinder 17, as shown in FIG. 2, the shear lines of the tumbler pin 23 and the driver pin 24 coincide with the fitting surfaces of the outer cylinder 16 and the inner cylinder 17, The inner cylinder 17 is in a state where it can rotate.

  Further, when the operation key 60 is inserted, the torque transmission shaft 48 is pushed in to move backward, and the second torque transmission pin 52 of the torque transmission shaft 48 comes out of the pin insertion hole 47 of the annular plate 45 and enters the notch 44 of the pin holder 31. Enter. At this time, the first torque transmission pin 51 only slides in the radial groove 54 and does not come out of the radial groove 54.

  FIG. 7A shows a state in which the second torque transmission pin 52 has entered the notch 44 of the pin holder 31. When the operation key 60 is rotated toward the unlocking position from this state, the inner part together with the operation key 60 is shown. The cylinder 17 rotates in the same direction.

  The rotation of the inner cylinder 17 is transmitted to the torque transmission shaft 48 via the first torque transmission pin 51 fitted in the radial groove 54, and the torque transmission shaft 48 is indicated by an arrow in FIG. Rotate in the direction shown.

  At this time, since the second torque transmission pin 52 of the torque transmission shaft 48 presses one end face of the cutout portion 44 facing in the circumferential direction, the pin holder 31 rotates in the same direction as the inner cylinder 17 and the pin holder 31 is fixed. The cam 27 rotates toward the unlocking position.

  FIG. 7B shows a state in which the cam 27 is rotated to the unlocked position, and the opening / closing body 3 is in a state where it can be opened. At this time, since the tumbler pin 23 remaining in the pin hole 22 on the inner cylinder 17 side faces the inner diameter surface of the outer cylinder 16, it cannot move radially outward and the operation key 60 cannot be pulled out. .

  When the operation key 60 is pulled out, the operation key 60 is rotated toward the unlocking position from the state shown in FIG. At this time, there is rotational direction play between the second torque transmission pin 52 and the end face of the notch 44, and the second torque transmission pin 52 rotates along the rotational direction play. The rotation of the cylinder 17 is not transmitted to the cam 27, the cam 27 is held in an unlocked state, and only the inner cylinder 17 rotates freely.

  FIG. 7C shows a state in which the operation key is rotated to the locking position. As shown in FIG. 2, the inner cylinder 17 has the pin hole 22 aligned with the pin hole 22 on the outer cylinder 16 side. Return to the locked position. At this time, since the tumbler pin 23 disposed in the pin hole 22 on the inner cylinder 17 side can move toward the pin hole 22 on the outer cylinder 16 side, the cam 27 is operated from the key hole 26 in the unlocked state. The key 60 can be pulled out.

  When the operation key 60 is pulled out, the torque transmission shaft 48 moves toward the inner cylinder 17 by the pressing of the spring 53. At this time, since the pin insertion hole 47 of the annular plate 45 faces the end of the notch 44, the second torque transmission pin 52 passes through the notch 44, and as shown in FIG. It enters into the pin insertion hole 47. When the first torque transmission pin 51 contacts the closed end surface of the radial groove 54, the torque transmission shaft 48 stops.

  When the opening / closing body 3 is locked, the operation key 60 is inserted into the key hole 26 of the inner cylinder 17 and the operation key 60 is rotated in the locking direction as described above.

  When the operation key 60 is inserted into the key hole 26 of the inner cylinder 17, as shown in FIG. 2, the shear lines of the tumbler pin 23 and the driver pin 24 coincide with the fitting surfaces of the outer cylinder 16 and the inner cylinder 17, and the inner cylinder 17 will be in the state which can rotate.

  Further, when the operation key 60 is inserted, the torque transmission shaft 48 is pushed in to move backward, and the second torque transmission pin 52 of the torque transmission shaft 48 comes out of the pin insertion hole 47 of the annular plate 45 and enters the notch 44 of the pin holder 31. Enter. At this time, the first torque transmission pin 51 only slides in the radial groove 54 and does not come out of the radial groove 54.

  FIG. 8D shows a state in which the second torque transmission pin 52 has entered into the notch 44 of the pin holder 31. When the operation key 60 is rotated toward the locking position from this state, the inner cylinder is moved together with the operation key 60. 17 rotates in the same direction.

  The rotation of the inner cylinder 17 is transmitted to the torque transmission shaft 48 via the first torque transmission pin 51 fitted in the radial groove 54, and the torque transmission shaft 48 is indicated by an arrow in FIG. Rotate in the direction shown.

  At this time, since the second torque transmission pin 52 of the torque transmission shaft 48 presses the other end surface facing the circumferential direction of the notch 44, the pin holder 31 rotates in the same direction as the inner cylinder 17, and the pin holder 31 is fixed. The cam 27 rotates toward the locking position.

  FIG. 8E shows a state in which the cam 27 is rotated to the locked position, and the opening / closing body 3 is in the locked state. At this time, since the tumbler pin 23 remaining in the pin hole 22 on the inner cylinder 17 side faces the inner diameter surface of the outer cylinder 16, it cannot move radially outward and the operation key 60 cannot be pulled out. .

  When the operation key 60 is pulled out, the operation key 60 is rotated toward the unlocking position from the state shown in FIG. At this time, there is rotational direction play between the second torque transmission pin 52 and the end face of the notch 44, and the second torque transmission pin 52 rotates along the rotational direction play. The rotation of the cylinder 17 is not transmitted to the cam 27, the cam 27 is held in a locked state, and only the inner cylinder 17 rotates freely.

  FIG. 8 (f) shows a state in which the operation key is rotated to the unlocked position. As shown in FIG. 2, the inner cylinder 17 has the pin hole 22 aligned with the pin hole 22 on the outer cylinder 16 side. Return to the unlocked position. At this time, since the tumbler pin 23 arranged in the pin hole 22 on the inner cylinder 17 side can move toward the pin hole 22 on the outer cylinder 16 side, the operation key is operated from the key hole 26 in the locked state of the cam 27. Can be pulled out.

  When the operation key 60 is pulled out, the torque transmission shaft 48 moves toward the inner cylinder 17 by the pressing of the spring 53. At this time, since the pin insertion hole 47 of the annular plate 45 faces the end of the notch 44, the second torque transmission pin 52 passes through the notch 44, and as shown in FIG. It enters into the pin insertion hole 47. When the first torque transmission pin 51 contacts the closed end surface of the radial groove 54, the torque transmission shaft 48 stops.

  As described above, in the multi-row pin cylinder shown in the embodiment, the locking / unlocking cam 27 is inserted into the key hole 26 in the locked position and in the unlocked position. By rotating the operation key 60, the inner cylinder 17 can be freely rotated until the pin hole 22 formed in the inner cylinder 17 matches the pin hole 22 formed in the outer cylinder 16. The operation key 60 can be pulled out at each of the locking position and the unlocking position.

11 Cylinder body 16 Outer cylinder 17 Inner cylinder 22 Pin hole 23 Tumble pin 24 Driver pin 25 Spring 26 Key hole 30 Torque transmission mechanism 31 Pin holder 43 Axial hole 44 Notch 45 Annular plate 46 Center hole 47 Pin insertion hole 48 Torque transmission shaft 51 First torque transmission pin 52 Second torque transmission pin 53 Spring 54 Radial groove 60 Operation key

Claims (1)

A cylinder main body, an outer cylinder fitted into the cylinder main body and fixed to the cylinder main body, and a rotatable inner cylinder fitted into the outer cylinder; the outer cylinder and the inner cylinder Pin holes extending in the radial direction on both sides are formed at equal intervals in a linear arrangement in the axial direction, and the pin hole rows are circumferentially spaced so that the positions of the pin holes are displaced in the axial direction. In each pin hole, a tumbler pin, a driver pin, and a spring for urging both pins inward in the radial direction are incorporated, and an operation key for the key hole formed in the inner cylinder is installed. The shear line of the tumbler pin and driver pin is aligned with the fitting surface of the outer cylinder and the inner cylinder by inserting, and the inner cylinder is rotated by rotating the operation key, and the plate-like locking cam connected to the inner cylinder is moved. Rotate between locked and unlocked positions In the multi-row type pin cylinder was Unishi,
A torque transmission mechanism that transmits the rotation of the inner cylinder that rotates integrally with the operation key to the cam is incorporated in the rear end portion of the cylinder body, and the torque transmission mechanism is provided in the rear end portion of the cylinder body. A pin holder to which the rear end portion is connected and an annular plate fixed to the tip end surface of the pin holder are rotatably incorporated, and an axial hole having substantially the same diameter as the center hole of the annular plate is provided at the center of the tip end surface of the pin holder. And a fan-shaped cutout portion that communicates with the opening end of the axial hole, and the annular plate is provided with a pair of pin insertion holes at positions facing the circumferential end portions of the cutout portion, In the axial hole of the pin holder, a slidable torque transmission shaft that is pushed back by inserting an operation key into the key hole and retracted, and a spring that urges the torque transmission shaft toward the inner cylinder are incorporated, That The torque transmission shaft is fitted to one of the pair of pin insertion holes and a first torque transmission pin slidably fitted in a radial groove formed on a rear end surface of the inner cylinder, and the torque transmission A second torque transmission pin is provided that moves out of the pin insertion hole and enters the notch by retreating the shaft, and is disengaged from the locking position of the cam between the second torque transmission pin and the end surface facing the notch in the circumferential direction. A multi-row type pin cylinder characterized by comprising a rotation direction play having a size equal to the rotation angle to the lock position .

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