JP2009270600A - Equipment fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an equipment fixing device having simple and inexpensive construction for producing reliable looseness preventing effects on vibration. <P>SOLUTION: The device 1 is provided for removably fixing equipment 32 onto a receiving member 31. The device comprises a screw rod 2, a rotary grip 3, a spring 4 existing between the screw rod 2 and the rotary grip 3, and a retainer member 5. The screw rod 2 has a collar portion 6, a screw portion 7, and a torque transmission portion 8. The screw portion 7 is threaded into a supporting member 34. The rotary grip 3 has a ratchet engaging portion 11, and is externally inserted into the torque transmission portion 8 of the screw rod 2 in an axially movable manner. The spring 4 energizes the rotary grip 3 to one end of the screw rod 2. The retainer member 5 is movable up and down relative to the screw rod 2 passing through an oblong hole 20. The retainer member 5 is made to abut on the equipment 32 and the front face of the supporting member 34 to make the collar portion 6 of the screw rod 2 abut on the retainer member 5, and a ratchet engaging portion 22 is made to elastically engage with the ratchet engaging portion 11 to hold the equipment 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for securely fixing an electronic device such as a computer detachably mounted on a receiving member such as an on-vehicle rack or tray to the receiving member without loosening due to vibration. .

As an apparatus for fixing an electronic device that is detachably mounted in a plug-in manner on an automobile, an aircraft, or the like, an apparatus described in Patent Document 1 is known. This device has a threaded spindle that is pivotally supported at one end by a rack, a sleeve that is screwed to the spindle, and a rotating grip that transmits rotational torque to the sleeve with restrictions. The sleeve and the rotating grip are connected by a detent groove, a ball falling into the detent groove, and a biasing spring. By rotating the rotary grip integrally with the sleeve, the sleeve is screwed on the spindle together with the flange, and the electronic device is pressed against the rack and fixed by the flange. When the pressing force of the flange reaches a certain value, the rotating grip idles and limits the torque. Since the sleeve is always pressed in the axial direction by the spring at the fixed position, the electronic device can be reliably fixed on the rack without retreating on the spindle by vibration.
U.S. Pat.No. 4,506,439

The conventional fixing device has a complicated structure and is expensive. The loosening prevention effect is obtained only by the engagement between the detent groove and the ball in the axial direction and the spring force, and there is a difficulty in lacking certainty.
Therefore, an object of the invention according to this application is to provide a device fixing device that can obtain a more reliable locking effect against vibration, has a simple structure, and can be obtained at low cost.

The invention according to this application for solving the above problems is an apparatus for removably fixing a device 32 detachably mounted on a receiving member 31 such as a rack or a tray to the receiving member 31. It is. The fixing device 1 includes a screw rod 2, a rotating grip 3, a spring 4 interposed between the screw rod 2 and the rotating grip 3, and a pressing member 5. The screw rod 2 has a flange portion 6 in the middle, has a screw portion 7 on one end side with the flange portion 6 as a boundary, and a torque transmission portion 8 on the other end side. The threaded portion 7 of the screw rod 2 is screwed substantially horizontally into a support member 34 that is formed as a part of the receiving member 31 or attached to the receiving member 31, and the screw rod 2 is tightened with respect to the supporting member 34. It is possible to advance and retract in the axial direction between the position and the non-tightening position. The rotating grip 3 is extrapolated to the torque transmitting portion 8 of the screw rod 2 so as to be able to transmit rotational torque around the axis and move in the axial direction, and an annular ratchet engaging portion 11 directed in the axial direction is provided on one end surface. Have. One end of the spring 4 is locked to the rotating grip 3 and the other end is locked to the screw rod 2, and the rotating grip 3 is constantly urged toward one end of the screw rod 2, and one end thereof is brought into contact with the flange 6. Make contact. The pressing member 5 includes a first surface 18 facing the front surface of the device 32 and the support member 34 on the receiving member 31, a second surface 19 opposite to the first surface 18, a long hole 20 penetrating between both surfaces, and a second surface. A pressing surface 21 which is on the surface 19 and abuts against the flange 6 of the screw rod, and a corresponding ratchet engaging portion 22 formed on the second surface 19 near the lower end of the long hole 20 are provided. The long hole 20 supports the screw member 2 so that the presser member 5 is supported relative to the screw rod 2 screwed into the support member 34 so as to be relatively movable up and down between an upper fixed position and a lower release position. Is inserted. When the pressing member 5 is in the fixed position and the screw rod 2 is in the tightening position, the pressing surface 21 contacts the flange portion 6 of the screw rod. The ratchet engaging portion 22 elastically engages with the ratchet engaging portion 11 of the rotary grip 3 when the screw rod is in the tightening position, and allows relative rotation in the screwing direction of the screw rod 2, but vice versa. Prevent direction rotation. The screw rod 2 is placed on the second surface 19 of the pressing member 5 in a state where the first surface 18 of the pressing member 5 arranged at the fixed position is in contact with the front surface of the device 32 and the support member 34 on the member 31. The ratchet engaging portion 22 of the pressing member 5 is elastically engaged with the ratchet engaging portion 11 of the rotary grip, thereby holding the device 32 on the receiving member 31.
Further, on the premise of the above configuration, the threaded rod 2 is configured to have a length that the other end side extends from the other end of the rotating grip 3 in a state in which the flange portion 6 is in contact with one end side of the rotating grip 3, and the other A stopper 10 extending radially outward can be provided on the end side, and a lock member 23 can be detachably interposed between the stopper 10 and the rotating grip 3. The lock member 23 is interposed between the stopper 10 and the other end of the rotary grip 3 when the screw rod 2 is in the tightening position, and can be locked. When the lock member 23 is mounted, the movement of the rotary grip 3 in the counter-biasing direction with respect to the screw rod 2 is restricted, and the engagement of the ratchet engaging portions 11 and 22 cannot be released. The movement operation to the tightening position can be made impossible. While the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to this.

According to the device of the invention according to this application, it is possible to provide a device fixing device that can obtain a more reliable locking effect against vibration, has a simple structure, and can be obtained at low cost.
If the fixing device is configured so that a lock member can be attached, the fixing device can be locked, and a higher security effect can be obtained.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a sectional view of the fixing device in the mounted state, FIG. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is an exploded perspective view of the fixing device, FIG. 4 is a sectional view of the fixing device before mounting, and FIG. FIG. 6 is a sectional view of the fixing device in the unlocking state, FIG. 7 is a front view of the locking member, (a) is a closed state, and (b) is an opened state.

  In the figure, an electronic device 32 such as a computer is detachably mounted in a plug-in manner on a receiving member 31 such as a rack or a tray. The receiving member 31 is provided in an environment where the vibration is intense such as on an aircraft or a vehicle. A rear retainer 33 is provided at the rear of the receiving member 31 to repress the device 32 from the rear toward the front. The fixing device 1 is for fixing the device 32 to the receiving member 31 by pressing it from the front after mounting the device 32 at a predetermined position on the receiving member 31.

  The fixing device 1 includes a screw rod 2, a rotary grip 3, a spring 4 interposed between the screw rod 2 and the rotary grip 3, and a pressing member 5 that presses the device 32.

  The screw rod 2 has a flange portion 6 in the middle, a screw portion 7 on one end side with the flange portion 6 as a boundary, and a torque transmission portion 8 on the other end side. The threaded portion 7 is screwed substantially horizontally into a support member 34 that is formed as a part of the receiving member 31 or attached separately to the receiving member 31. The torque transmission part 8 is formed by forming a flat part 9 on a part of a cylindrical body. The screw rod 2 is axially positioned between a tightening position (position in FIG. 1) screwed into the support member 34 to a predetermined position and a non-tightening position (position in FIG. 5) screwed back from the support member 34 to the predetermined position. You can move forward and backward. The other end of the screw rod 2 is provided with a stopper 10 extending outward in the radial direction.

  The rotating grip 3 is extrapolated to the torque transmitting portion 8 of the screw rod 2 so as to be able to transmit rotational torque around the axis and move in the axial direction, and an annular ratchet engaging portion 11 directed in the axial direction is provided on one end surface. Have. The rotary grip 3 includes a cylindrical portion 12 and a pair of wing portions 13 protruding outward from the cylindrical portion 12 in the radial direction. Inside the cylindrical portion 12, a hook receiving portion 15 is provided on one end side and an spring receiving portion 16 is provided on the other end side with an inner peripheral flange 14 formed near one end side as a boundary. The inner peripheral hole 17 of the flange 14 has a cross-sectional shape that penetrates the torque transmitting portion 8 of the screw rod 2 so as to be relatively movable in the axial direction and impossible to rotate relative thereto.

  The spring 4 is inserted into the outer periphery of the torque transmitting portion 8 of the screw rod 2 in the spring receiving portion 16, one end is locked to the flange 14 of the rotary grip 3, and the other end is locked to the stopper 10 of the screw rod 2. The By this spring 4, the rotary grip 3 is urged in the axial direction toward one end side of the screw rod 2, and the flange 14 on one end side thereof is brought into contact with the flange portion 6.

  The holding member 5 includes a first surface 18 facing the front surface of the device 32 and the support member 34 on the receiving member 31, a second surface 19 opposite to the first surface 18, a vertical hole 20 penetrating between both surfaces, A pressing surface 21 on the second surface 19 that contacts the flange 6 of the screw rod 2 and a corresponding ratchet formed in an annular shape so as to protrude on the second surface 19 near the lower end of the long hole 20 And an engaging portion 22.

  The long hole 20 allows the presser member 5 to move up and down relatively between the upper fixed position (FIG. 1) and the lower release position (FIG. 6) with respect to the screw rod 2 screwed into the support member. The threaded rod 2 is inserted so as to support it.

  The pressing surface 21 comes into contact with the flange portion 6 when the pressing member 5 is in the fixed position and the screw rod 2 is in the tightening position. The ratchet engagement portion 22 elastically engages with the ratchet engagement portion 11 of the rotary grip 3 when the screw rod 2 is in the tightening position, and allows relative rotation in the screwing direction of the screw rod 2. Prevent rotation in the opposite direction.

  As shown in FIG. 1, the second surface of the pressing member 5 in a state where the first surface 18 of the pressing member 5 disposed at the fixed position is in contact with the front surface of the device 32 and the support member 34 on the member 31. The device 32 is received by bringing the flange portion 6 of the screw rod 2 into contact with the surface 19 and elastically engaging the ratchet engaging portion 22 of the pressing member 5 with the ratchet engaging portion 11 of the rotary grip 3. Hold on member 31.

  A lock member 23 can be detachably interposed between the stopper 10 of the screw rod 2 and the rotary grip 3 in a state where the device 32 is held. The lock member 23 includes a pair of open / close pieces 24 and 25 pivotably attached to each other so that the screw rod 2 can be surrounded and released from the outer periphery of the spring 4. The pair of opening and closing pieces 24, 25 can be locked with a lock 26 (FIG. 1) with the ring closed. Therefore, the lock member 23 is interposed between the stopper 10 and the rotary grip 3, thereby restricting the movement of the rotary grip 3 in the counter-biasing direction with respect to the screw rod 2, and engaging the ratchet engaging portions 11 and 22. By making the engagement impossible to release, the screw return operation to the untightened position of the screw rod becomes impossible.

  In the case of using this fixing device, the device 32 is pushed into a predetermined position from the state shown in FIG. 3, and then the rotary grip 3 is grasped and the screw is held in a state where the pressing member 5 is disposed at the upper fixed position. When the rod 2 is screwed into the support member 34, the ratchet engaging portions 11 and 22 begin to contact each other. However, if the screwing operation is continued as it is, the flange portion 6 is pressed against the pressing surface 21 of the pressing member 5 and screwed. The rotation of the rod 2 stops integrally with the rotating grip 3. During this time, the engaging portions 11 and 22 move the rotating grip 3 relative to the screw rod 2 to the other end side by a predetermined distance while compressing the spring 4 without preventing the rotating grip 3 from rotating in the screwing direction. Let Therefore, as shown in FIG. 1, in the state where the pressing member 5 is pressed by the screw rod 2, the rotary grip 3 is elastically pressed against the pressing member 5 by the spring 4, and the ratchet engaging portions 11, 22 are mutually connected. Will be engaged. For this reason, unless the rotary grip 3 is artificially moved to the other end side of the screw rod 2 against the spring force, the screw rod 2 does not rotate in the screw return direction, and may be loosened by an external force such as vibration. Absent.

  In this state, as shown in FIG. 1, if the lock member 23 is mounted between the stopper 10 of the screw rod 2 and the rotary grip 3 and locked, the device 32 cannot be removed unless unlocked.

  When the device 32 is removed from the receiving member 31, the rotary grip 3 is gripped with the lock member 23 removed, and the spring 4 is compressed as shown in FIG. By pulling to the end side, the ratchet engaging portions 11 and 22 are pulled apart and rotated in the screw return direction integrally with the screw rod. Thereby, since the pressing member 5 is lowered to the non-fixed position at the same time as the collar portion 6 is separated from the pressing surface 21 of the pressing member 5, the device 32 can be pulled out from the receiving member 31.

It is sectional drawing of the fixing device of a mounting state. FIG. 2 is a sectional view taken along line II-II in FIG. It is a disassembled perspective view of a fixing device. It is sectional drawing of the fixing device before mounting | wearing. It is sectional drawing of the fixing device of the fixation release operation process. It is sectional drawing of the fixing device of a fixed release state. In the front view of a locking member, (a) shows a closed state and (b) shows an open state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixing device 2 Threaded rod 3 Rotating grip 4 Spring 5 Holding member 6 鍔 part 7 Screw part 8 Torque transmission part 9 Flat part 10 Stopper 11 Ratchet engagement part 12 Cylindrical part 13 Wing part 14 Inner peripheral flange 15 鍔 receiving part 16 Spring Receiving portion 17 Inner peripheral hole 18 First surface 19 Second surface 20 Long hole 21 Press surface 22 Ratchet engaging portion 23 Lock member 24 Opening / closing piece 25 Opening / closing piece 26 Lock 31 Receiving member 32 Equipment 33 Rear retainer 34 Support member

Claims (2)

A device for removably fixing a device that is detachably mounted on a receiving member such as a rack or a tray, to the receiving member,
Has a flange in the middle, has a threaded portion at one end with this flange as a boundary, has a torque transmission portion at the other end, and is formed as a part of the receiving member or attached to the receiving member A threaded rod that is screwed into the support member substantially horizontally, and is capable of moving back and forth in the axial direction between a tightening position and a non-tightening position with respect to the support member;
A rotating grip having an annular ratchet engaging portion which is externally inserted to the torque transmitting portion of the screw rod so as to transmit rotational torque around the shaft and which is axially movable;
One end is locked to the rotating grip, the other end is locked to the screw rod, the spring is constantly biased toward one end of the screw rod, and the one end is brought into contact with the flange,
A first surface facing the front surface of the device on the receiving member and the support member, a second surface opposite to the first surface, and an upper fixed position and a lower release relative to the screw rod screwed into the support member A long hole through which the screw rod is inserted between the first and second surfaces so that the screw rod can move up and down relative to the position, and a flange portion of the screw rod which is on the second surface and is in the tightening position at the fixed position. When the abutting pressing surface and the threaded rod are in the tightening position, they are elastically engaged with the ratchet engaging portion of the rotating grip to allow relative rotation in the screwing direction of the threaded rod, but prevent rotation in the opposite direction. And a pressing member provided with a corresponding ratchet engaging portion formed on the second surface in the vicinity of the lower end portion of the long hole,
With the first surface of the pressing member arranged at the fixed position in contact with the device on the receiving member and the front surface of the support member, the second surface of the pressing member is contacted with the flange of the screw rod. A device fixing device characterized in that the device is held on the receiving member by bringing the ratchet engaging portion of the pressing member into elastic contact with the ratchet engaging portion of the rotary grip. The screw rod has a length in which the other end side extends from the other end of the rotating grip in a state where the flange portion is in contact with one end side of the rotating grip, and extends radially outward to the other end side. Equipped with a stopper,
Further, when the threaded rod is in the tightening position, it is detachably interposed between the stopper and the other end of the rotating grip, and can be locked in the mounted state. A lock member that restricts the movement of the screw rod to the non-tightening position by restricting the movement in the urging direction and disengaging the ratchet engagement portion. The apparatus fixing device according to claim 1.

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