JP2000161331A - Retainer with anti-theft function and locking function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To add a locking function against vibration and a anti-theft function to a retainer which can connect and remove an apparatus and a frame manually without using a tool. SOLUTION: The hexagonal head 58 of the nut 38 of a retainer 30 is fitted to the hexagonal search hole of an operation collar 40 with one-way ratchet teeth 66, impossible to rotate relatively and allowable to displace in the axial direction. The operation collar 40 is energized to a lock member 36 by a spring 42. When an apparatus is fixed to a frame, an operation key 44 is inserted to the operation collar 40 and rotated clockwise, to fasten a nut 38. Since the ratchet teeth 66 of the operation collar 40 are engaged with the ratchet teeth 56 of the lock member 36 in the fastening condition, the nut 38 is never loosened even though vibration is received. The anti-theft purpose can be accomplished when the operation key 44 is being pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retainer used for fixing two objects to each other, for example, for fixing an apparatus to a frame of the apparatus. The present invention particularly relates to a retainer provided with a locking function for preventing a nut of the retainer from rotating in the reverse direction due to vibration or the like and a theft preventing function.

[0002]

2. Description of the Related Art Since equipment mounted on a moving object such as a vehicle, an aircraft or a ship receives external vibration, this type of equipment is mounted on a pedestal equipped with a vibration-proof mechanism as a measure against vibration. Often done. As shown in FIG. 1, the anti-vibration pedestal 10 includes, for example, a base plate 12, anti-vibration rubber 14, and a device mounting chassis 16.
Is vibration-proof against the base plate 12 by the vibration-proof rubber 14. The base plate 12 of the gantry 10 is fixed to an installation place such as a vehicle body with bolts 18 or the like, and is not easy to remove. Therefore, in order to improve the maintainability of the equipment 20, the equipment 20 and the mounting chassis 16 are easy. It must have a fixed structure that can be attached to and detached from.

In order to mount the device 20 to the gantry 10 without using a tool, a conventional retainer 22 is used.
Is used. As shown in FIG. 2, the conventional retainer 22 includes a thumb screw 24 with a knob 23 and a bracket 26 with a holding claw 25. When the thumbscrew 24 is screwed into the block 27 fixed to the mounting chassis 16 of the gantry 10, the bracket 26 is pressed by the thumbscrew 24, and the holding claw 25 of the bracket 26 is moved to the lower flange 2 of the device 20.
8 is gripped and the device 20 is fixed.

[0004]

However, the conventional retainer has a problem that the thumbscrew 24 is loosened when vibration is applied from the outside while the device is fixed. Further, since the device can be easily removed from the gantry simply by turning the knob of the thumbscrew 24 by hand without using a tool, no countermeasures are taken against theft of the device. An object of the present invention is to solve the above-mentioned problems and to provide a retainer that can achieve both the function of preventing loosening without impairing the ease of detachment. Another object of the present invention is to provide a retainer further having an anti-theft function.

[0005]

SUMMARY OF THE INVENTION The present invention provides a retainer for locking a second object (e.g., equipment) to a first object (e.g., a gantry), the retainer comprising: 1) a shaft with an external thread (male thread) fixed to the first object and extending outward from the first object;
(3) a bracket provided with a holding claw that engages with an object and through which the shaft is inserted; and (3) an axially outside (free end side of the shaft) non-rotatably but axially displaceably mounted on the shaft in the axial direction, A one-way lock member having outward ratchet teeth; and (4) a nut screwed to the shaft axially outside the lock member and acting on the lock member to press the bracket against the second object via the lock member. And (5) a ratchet tooth which is attached to the shaft at an axially outer side of the nut, engages with the nut so as to rotate relative to the nut so as to be non-rotatable, but relatively displaceable in the axial direction, and engages the ratchet tooth of the lock member. (6) The operation member is moved toward the lock member so that the ratchet teeth of the operation member mesh with the ratchet teeth of the lock member. With urging Te biasing means (spring)
And (7) an operation key for rotating the operation member (preferably provided with a knob which can be operated by hand).

In a preferred embodiment, a key for rotating the operation member is detachably engaged with the operation member.

When the operation key is fitted into the operation member and the operation key is turned clockwise by the operation key, the nut interlocked with the operation member is rotated to tighten the bracket, and at the same time the operation member is rotated via the spring. It is pushed. When the ratchet teeth of the operating member eventually engage with the ratchet teeth of the lock member, the lock member is non-rotatably mounted on the shaft and does not rotate around the shaft, so the ratchet teeth of the operation member and the ratchet of the lock member are not rotated. As long as the teeth are engaged, the operating member does not rotate in the opposite direction (the direction in which the nut loosens). Therefore, even if vibration acts on the retainer, the nut does not loosen.
When the key is further turned, the lock member pressed by the nut pushes the bracket, thereby fixing the device. After the fixing is completed, if the operation key is removed from the retainer, the retainer cannot be loosened, and the operation key can be used as a key to implement anti-theft measures.

In a preferred embodiment, the operating key comprises a radial pin and the operating member has a keyway in which the radial pin of the key can be engaged. The key groove of the operation member has a shape such that a tensile force acts on the operation member when the radial pin of the operation key is engaged with the key groove and the key is pulled outward in the axial direction. With such a structure, when removing the device from the gantry, the operation key is inserted into the operation member, and the operation key is pulled axially outward by the operation key, so that the ratchet teeth of the operation member are ratcheted by the lock member. It can be easily released from meshing with the teeth and the nut can be easily loosened.

Preferably, the locking member has a cylindrical portion substantially surrounding the operating member. With such a shape, the operating member can be protected from external damage, and at the same time, the appearance of the retainer can be made compact to prevent theft or tampering.

In a specific embodiment, the externally threaded shaft has a non-circular cross-section and the locking member has an opening with a non-circular cross-section adapted to the non-circular cross-section of the shaft, so that the locking member rotates relative to the shaft. It has been stopped.
The nut has a hexagonal head and the operating member has a counterbore of hexagonal cross section for receiving the hexagonal head of the nut.
Alternatively, the operating member and the nut may be fitted to each other by a spline or the like.

[0011]

Referring to FIG. 3, a retainer 30 of the present invention includes an externally threaded shaft 32, a bracket 34, a one-way lock member 36, a nut 38, an operation collar 40, and a bamboo shoot. It has a spring 42 and operation keys 44. The retainer 30 can be used to fix the device 20 to the mounting chassis 16 of the gantry 10 instead of the conventional retainer 22 shown in FIG.

[0012] As shown in FIG.
Numeral 2 is fixed to the mounting chassis 16 by embedding or the like, and extends, for example, forward. In order to prevent the bracket 34 and the lock member 36 from rotating as described later, the threaded shaft 32 is cut so as to have a non-circular cross section. In the illustrated embodiment, both sides of the shaft 32 are cut in parallel so as to have a vertically long section, but a D-cut or other non-circular cuts may be used.

As best seen in FIGS. 3 and 4, the bracket 34 includes a bent presser pawl 46 for pressing down on the lower flange 28 of the device 20 (see FIG. 2). An elongated hole 48 is formed in the center of the bracket 34 so that the shaft 32 can be inserted therethrough.
The width of the elongated hole 48 is slightly larger than the width of the longitudinal section of the shaft 32, but smaller than the outer diameter of the shaft 32, so that the bracket 34 does not rotate with respect to the shaft 32.

Referring to FIGS. 3 and 5, the one-way locking member 36 has a circular bottom wall 50 and a cylindrical side wall 52, and the center of the bottom wall 50 is slightly smaller than the longitudinal section of the shaft 32. An opening 54 having a large longitudinal section is formed. Since the opening 54 has a vertically long cross section, when the lock member 36 is mounted on the shaft 32, the lock member 3
6 cannot rotate with respect to the shaft 32. An annular ratchet tooth row 56 is formed on the bottom wall 50. The ratchet teeth 56 project forward toward the ratchet teeth of the operation collar 40 described later.

As shown in FIGS. 3 and 6, the nut 3
Reference numeral 8 denotes a ring groove 6 for mounting a circlip or C-ring 62 (FIG. 3) for supporting the spring 42 at the tip of the body 60, having a hexagonal head 58 and a cylindrical body 60.
4 are formed.

Referring to FIGS. 3 and 7, the operation collar 40 has a substantially cylindrical shape, and a ratchet tooth row 66 meshing with the ratchet tooth row 56 of the lock member 36 is formed at the rear end. Ratchet teeth 56 and 66
Is an operation collar 40 in the tightening direction of the nut 38.
Is allowed to rotate, but is prevented from rotating in the opposite direction. In the rear half of the operation collar 40, a nut 3
A counterbore hole 68 having a hexagonal cross section is formed to receive the hexagonal head 58 of FIG. 8 with a small clearance. Therefore, the operation collar 40 and the nut 38 can move relative to each other in the axial direction, but cannot rotate relative to each other. Counterbore hole 68 has sufficient axial dimension (depth)
In which the head 58 of the nut 38 can move axially with a sufficient stroke. The central wall 70 of the operating collar 40 has a cylindrical body 60
Is formed to have a circular opening 72 through which is inserted.

The first half of the operation collar 40 is a cylindrical portion 74, into which the operation key 44 can be fitted.
The cylindrical portion 74 is formed with, for example, four T-shaped key grooves 76 that are equally spaced in the circumferential direction.

The nut 38, the operating collar 40 and the spring 42 are inserted into the circular opening 72 of the operating collar 40 by the nut 38.
Of the spring 42, and the rear end of the spring 42 is supported on the central wall 70 of the operation collar 40.
After compression, the circlip 62 is attached to the ring groove 64 at the tip of the body portion 60 of the nut 38 and the front end of the spring 42 is supported, whereby the nut 38 is assembled integrally.

As can be clearly seen from FIGS. 3 and 8, the operation key 44 has a knob 78 and radial pins 80 which are equally spaced in the circumferential direction. Pin 8 of operation key 44
Zeros are provided in the same number as the key grooves 76 of the operation collar 40.

Next, the manner of use of the retainer 30 will be described. In order to fix the device 20 to the mounting chassis 16 of the gantry 10 shown in FIG.
It is necessary to fix the threaded shaft 32 in advance in the mounting chassis 16 by embedding or the like. The bracket 34 and then the lock member 36 are inserted into the threaded shaft 32 embedded in the mounting chassis 16 in this manner. Next, the nut 38 of the assembly of the nut 38, the operation collar 40, the spring 42, and the circlip 62 is screwed into the shaft 32.

To fix the device 20 mounted on the mounting chassis 16 of the gantry 10, the pins 80 of the operation keys 44 are fixed.
When the operation key 44 is turned clockwise, the hexagonal counterbore hole 68 of the operation key 44 and the hexagonal head of the nut 38 are linked to rotate the nut 38. As a result, the nut 38 is screwed into the shaft 32 (FIG. 9A).

As the nut 38 is screwed in, the ratchet teeth 66 of the operation collar 40 come into mesh with the ratchet teeth 56 of the lock member 36. As the nut 38 is further screwed in, the operating collar 40 is pushed toward the locking member 36 by the spring 42, and the ratchet teeth 66 of the operating collar 40 and the ratchet teeth 56 of the locking member 36 idle, and the locking member 36 and the bracket 34 are rotated. Is pushed toward the mounting chassis 16. When the bracket 34 contacts the mounting chassis 16, the slot 4
8, the bracket 34 is lifted up by an extra length, and the holding claws 46 of the bracket 34 are hooked on the lower flange 28 of the device 20 for positioning (FIG. 9B).

When the operation key 44 is further turned to further tighten the nut 38, the nut 38 strongly presses the bracket 34 to the mounting chassis 16 via the lock member 36, and the device 20 is attached to the mounting chassis 16 by the holding claw 46 of the bracket 34.
(FIG. 9 (C)).

When the nut is tightened until the operation key 44 no longer turns, the pin 80 of the operation key 44 is removed from the key groove 76 of the operation collar 40, and the operation key 44 is removed from the operation collar 40 (FIG. 9C). ). In this state, an outsider who does not have the operation keys 44 cannot turn the operation collar 40 and cannot loosen the retainer 30, so that the device 20 is prevented from being stolen. Operation color 4
0 is urged toward the lock member 36 by the spring 42, and the ratchet teeth 66 of the operation collar 40 mesh with the ratchet teeth 56 of the lock member 36, so that the nut 38 may rotate in a direction in which the nut 38 is loosened by vibration. Absent. Therefore, the loosening is prevented.

When removing the device 20, the operation key 4
4 and fitted into the key groove 76 of the operation collar 40, and the spring 42 is compressed by turning the operation key 44 toward the front and compressing the spring 42, so that the ratchet teeth 66 of the operation collar 40 and the ratchet teeth 56 of the lock member 36 Is released from the engagement (FIG. 9 (D)). Thus, operation key 4
By turning counterclockwise while pulling 4 forward, the nut 38 is loosened, and at the same time the lock member 36 and the bracket 34 are also loosened, and the bracket 34 falls down by the extra length of the elongated hole. Can be done.

[0026]

As described above, according to the present invention, when the operation key 44 with the knob is turned, the ratchet teeth 66 of the operation collar 40 and the ratchet teeth 56 of the lock member 36 are engaged. Since the nut fastens the bracket to fix the device, the nut can be prevented from being loosened by vibration. Furthermore, by removing the operation key 44 from the retainer after the device is fixed, the nut 38 cannot be loosened, which also has the effect of preventing theft.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where equipment is fixed to a gantry using a conventional retainer.

FIG. 2 is a sectional view of the conventional retainer shown in FIG.

FIG. 3 is an exploded perspective view of the retainer of the present invention.

4A and 4B show details of a bracket of the retainer shown in FIG. 3, wherein FIG. 4A is a front view and FIG. 4B is a side view.

5A and 5B show details of a lock member of the retainer shown in FIG. 3, wherein FIG. 5A is a rear view, FIG.
(C) is a front view.

6A and 6B show details of the nut of the retainer shown in FIG. 3, wherein FIG. 6A is a side view, FIG. 6B is a rear view, and FIG.

7A and 7B show details of an operation collar of the retainer shown in FIG. 3, wherein FIG. 7A is a longitudinal sectional view, FIG. 7B is a rear view, and FIG.
Is a side view, and (D) is a front view.

8A and 8B show details of operation keys of the retainer shown in FIG. 3, wherein FIG. 8A is a partially cutaway view, FIG.
(C) is a side view.

9 is a schematic cross-sectional view showing different stages in the use state of the retainer of the present invention shown in FIG.

[Explanation of symbols]

 16: Mounting chassis for gantry (first object) 20: Equipment (second object) 30: Retainer 32: Threaded shaft 34: Bracket 36: One-way lock member 38: Nut 40: Operation member (operation collar) 42 : Bamboo spring (biasing means) 44: Operation key 52: Cylindrical part of lock member 76: Key groove of operation member 80: Radial pin of key

Claims (7)

[Claims] 1. A retainer for locking a second object adjacent to a first object, comprising: an externally threaded shaft fixed to said first object and extending outwardly from said first object; A bracket having a pressing claw engaged with the second object and through which the shaft is inserted; and a ratchet tooth that is non-rotatably but axially displaceable mounted on the shaft at an axially outer side of the bracket and that is axially outwardly directed. A one-way lock member comprising: a nut screwed to the shaft at an axially outer side of the lock member, and acting on the lock member to press the bracket against the second object via the lock member; The lock portion is attached to the shaft on the outer side in the axial direction, and engages with the nut so as to rotate the nut so as to be relatively non-rotatable but relatively displaceable in the axial direction. An operating member having ratchet teeth meshing with the ratchet teeth of the above, an urging means for urging the operating member toward the locking member so that the ratchet teeth of the operating member mesh with the ratchet teeth of the locking member, and rotating the operating member. And a key for operating the retainer. 2. The key can be engaged with and disengaged from an operation member, and when the key is removed, it becomes impossible or difficult to rotate the operation member by hand, thereby preventing the second object from being stolen. A retainer according to claim 1, characterized in that it is prevented. 3. The key comprises a radial pin, the operating member comprises a keyway in which the radial pin of the key is engageable, and the keyway engages the radial pin in the keyway. 3. The retainer according to claim 2, wherein the retainer has a shape such that a tensile force acts on the operation member when the operation member is pulled outward in the axial direction. 4. The lock member according to claim 1, wherein the lock member has a cylindrical portion substantially surrounding the operation member.
Retainer based on any of the above. 5. The externally threaded shaft has a non-circular cross-section and the locking member has a non-circular cross-section opening adapted to the non-circular cross-section of the shaft, whereby the locking member is detented relative to the shaft. The retainer according to any one of claims 1 to 4, wherein the retainer is provided. 6. The nut according to claim 1, wherein the nut has a hexagonal head, and the operating member has a counterbore of hexagonal cross section for receiving the hexagonal head of the nut.
Retainer based on one of 5 to 5. 7. The retainer according to claim 1, wherein the key has a knob that can be operated by hand.