JP2004049359A - Locking mechanism and locking mechanism of stretchable columnar body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking mechanism for a stretchable columnar body, which applies braking to the stretching movement of an upper support to a lower support when the hand is removed from a lock handle, and locks the stretching movement of the upper support to the lower support by the operation of the handle. <P>SOLUTION: This locking mechanism comprises two members for which to one member, the other member is slidably provided, the locking handle 3 projecting a bolt part 15 to which a lock nut 5 is fixed on one end, and a braking spring 7. A thicker part 17 on which a through hole is formed is provided on the one member. The bolt part 15 is inserted in the thicker part 17, and the lock nut 5 is fixed by loosely fitting a slit of the other member on the opposite side from the locking handle 3 side of the bolt part 15. The braking spring 7 is fastened in a space between the locking handle 3 and the one member. Then, the clamping force of the lock nut 5 and the reset force of the braking spring 7 under a state wherein the hand is removed from the locking handle 3 are set in such a manner that braking is applied between the two members which are slidably provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a general lock mechanism having a temporary tightening function and a final tightening function, and a lock mechanism for a telescopic columnar body in which the lock mechanism is applied to a telescopic columnar body. In particular, the present invention relates to a lock mechanism having a temporary tightening function and a final tightening function for preventing an unexpected expansion and contraction movement of the telescopic columnar body in a telescopic columnar body in which an upper column can expand and contract with respect to a lower column.
[0002]
[Prior art]
In a conventional height meter, there is an example in which a stretchable columnar body is used for convenience of carrying. In this case, the columnar body is slidably guided inside the cylindrical portion of the lower support, outside the cylindrical portion of the upper support. In use, the upper column is locked in an extended state.
[0003]
[Problems to be solved by the invention]
However, when the height meter is moved, there is no mechanism for locking the upper support in the state of being stored in the lower support, and there is a risk that the upper support will suddenly pop out. Also, when the upper support is stored in the lower support, if the user accidentally releases his hand from the upper support, the upper support may suddenly descend and the cursor may hit a person.
[0004]
SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to extend and retract a hand from a lock handle to apply a brake to the expansion and contraction movement of an upper support relative to a lower support, and to further lock the expansion and contraction movement of an upper support relative to a lower support by operating the handle. The purpose is to provide a body locking mechanism.
[0005]
[Means for Solving the Problems]
The present invention employs the following solutions in order to achieve the above object.
[0006]
The lock mechanism of the present invention has the following features.
(A) Since a notch determination mechanism including a notch button, a button spring, a notch texture pin and a notch texture spring is provided, when the telescopic upper support is extended from the lower support, it can be easily and accurately positioned at the extended position, and the positioning can be easily released. it can.
(B) In the notch determination mechanism including the notch button, the button spring, the notch texture pin, and the notch texture spring, the notch determination state is displayed by the protruding state of the notch button, whereby the nested upper support is extended from the lower support to the state (1). And the opposite, with the upper column shortened, can be clearly recognized.
(C) Since the locked state is maintained by the lock handle, the handle collar, the lock nut, the brake rubber, and the bolt, when the nested upper column is extended from the lower column, both columns are powerfully and reliably. It is possible to prevent wobbling or the like caused by tightening.
(D) Since the brake mechanism is constituted by the lock handle, the handle collar portion, the lock nut, the brake rubber, the brake spring, and the bolt portion, the lock handle is changed from the locked state in which the nested upper support is locked to the lower support with the upper support extended. When the upper support and the lower support are in a free state when the lock is released by the operation of, that is, when the upper support and the lower support are in a free state, even if the lock handle is released by mistake, the upper support does not move freely. Can be braked.
[0007]
The present invention employs the following solution in order to achieve the above object.
(1) The lock mechanism is composed of two members provided slidably with respect to one member with respect to the other member, a lock handle provided with a bolt portion having a lock nut fixed to one end thereof, and a brake spring. A thick portion for forming a through hole is provided in the member, the bolt portion is inserted into the thick portion, and a slit portion of the other member is loosely inserted into the bolt portion on the side opposite to the lock handle side, and the lock nut is inserted. Is fixed, the brake spring is locked between the lock handle and the one member, and the tightening force of the lock nut and the return force of the brake spring when the hand is released from the lock handle are reduced. It is characterized in that a brake is set between the two members slidably provided.
(2) The lock mechanism according to the above (1), wherein the brake spring is constituted by a torsion spring.
(3) In the lock according to the above (1) or (2), the other member partially supports a notch texture spring having a notch texture pin protruding at one end, a through hole is provided in the one member, and the notch is formed in the through hole. A button spring is provided so that the button is inserted and the notch button is inserted into the through hole, a notch pin is dropped into the through hole according to the sliding operation of the other member, and the notch button opposes the spring force of the button spring. It is characterized by being provided so as to be pushed out.
(4) In the lock mechanism according to the above (3), the tip of the notch texture pin and the tip of the notch button are formed in an inclined portion, and the inclined portion of the notch button is pressed by the inclined portion of the notch button. The notch pin is pressed obliquely to be locked at the opening edge of the through hole.
(5) In the locking mechanism of the telescopic columnar body, the two members according to any one of (1) to (4) are an upper column and a lower column of the telescopic columnar member.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described in detail with reference to the drawings.
[0009]
The present invention relates to a general locking mechanism between two sliding members. Hereinafter, an embodiment in which the present invention is applied to a lock mechanism of a telescopic strut in a height meter will be described.
[0010]
【Example】
FIG. 1 is an explanatory diagram of a lock mechanism in a height meter according to the present invention. 1A is an external view of the lock mechanism. FIG. 1C is a cross-sectional view taken along the line C-C of FIG. 1C. FIG. 1B is a front view cross-sectional view of the lock mechanism. FIG. 1 (c) is a perspective view of the lock mechanism with the side removed, the lock handle and the notch button removed, and FIG. 1 (c) is an external view of the lock mechanism. FIG. 1D is a sectional view taken along line AA of FIG. 1A, and FIG. 1E is a sectional view taken along line BB of FIG.
[0011]
As shown in FIG. 1 (a), the column of the height meter is composed of an upper column 1 serving as an inner tube and a lower column 2 serving as an outer tube, and the upper column 1 is arranged to slide in the lower column 2. Have been. As shown in FIGS. 1 (a), 1 (b) and 1 (d), the upper column 1 is formed by drawing a plurality of strips inward toward the inside, is thin, and has a cross section cut off at both ends. As shown in FIG. 1 (b), a slit 14 is formed in an elliptical shape and has a width in which the bolt portion 15 is loosely inserted in the longitudinal direction. It is fixed. A notch texture pin 9 is fixed to the tip of the notch texture spring 10. The notch texture pin 9 is pressed against the notch button 8 by the spring force of the notch texture spring 10. The tip of the notch button 8 and the tip of the notch texture pin 9 are inclined portions formed on an inclined surface.
[0012]
The notch texture pin 9 is inserted into the slit 14. As shown in FIGS. 1A and 1E, the notch texture pin 9 is shorter than a length of a through hole 18 penetrating the thick portion 17 of the lower support 2 and has a tip (notch button). Side) is processed to be inclined.
[0013]
As shown in FIG. 1A, the lower support 2 is formed in the thick portion 17 only at the portion where the lock mechanism is provided, and the other portions are formed to have a small thickness. It is formed according to the cross-sectional shape. The lower support 2 slidably guides and supports the upper support 1 at a portion where the lock mechanism is provided. In this embodiment, the thick portion 17 is provided integrally with the lower support. However, it is shown in a later-described embodiment that the thick portion 17 is provided separately, and either one can be appropriately selected.
[0014]
The lock mechanism is configured to be operated by a lock handle and a notch button as shown in FIG.
[0015]
As shown in FIG. 1 (c), the lock handle portion has a lock handle 3 formed in the shape of a rotary knob, and a bolt portion 15 fixed to the lock handle 3 and penetrating through the thick portion 17 of the lower support 2. And a lock nut 5 screwed to the tip of the bolt portion 15 and having a plate-shaped brake rubber 6 adhered to the upper column 1 side, and a brake spring 7 composed of a torsion spring shown in FIG. ing. The bolt part 15 is inserted into a through hole 16 provided in the thick part 17. One end of the torsion spring constituting the brake spring 7 is fixed to the handle collar portion 4 of the lock handle 3, and the other end is fixed to the brake spring fixing portion 13 of the lower support 2.
[0016]
The mechanism for preventing the lock nut 5 from rotating will be described with reference to FIGS. 3 (a) to 3 (c). FIG. 3A is a cross-sectional view of the lock handle 3 cut out only, and FIG. 3B is a view showing the relationship between the bolt portion 15 and the lock nut 5, and FIG. FIG. 4 is a diagram for explaining the relationship between the rotation stop and the rotation stop.
[0017]
The lock nut 5 is formed in a rectangular shape as shown in FIG. 3C, and is screwed on both sides with a detent 20 having a T-shaped cross section through a plate-shaped brake rubber 6 having the same area. It is fixed. A through hole 21 is formed through the detent 20 and the brake rubber 6. The through hole 21 has a diameter in which the bolt portion 15 is loosely fitted. A female screw portion of the lock nut 5 is provided at the end of the through hole 21 and is screwed with a male screw of the bolt portion 15.
[0018]
3 (c) is connected to the lock handle 3 via the through-hole of the thick portion 17 and the cut-and-raised end of the slit of the upper column 1 as shown in FIG. 3 (a). The bolts 15 are screwed together. As shown in FIG. 3 (a), the both-side projecting portions of the T-shaped cross section of the detent 20 are formed between the recesses on both sides along the through holes 16 of the thick portion 17 and the cut-and-raised ends 23 of the slits of the upper column 1. It is locked so as not to rotate in the gap. As a result, the lock nut 5 is locked in a detented state, and is tightened or released by screwing the bolt portion 15. FIG. 3A shows an example in which the lower support 2 and the thick portion 17 are separate bodies. As a result, only the portion where the thickness is required can be made the thick portion, so that the lower column 2 can be formed thin.
[0019]
When the lock handle 3 is turned clockwise, the bolt 15 pulls the lock nut 5 toward the through hole 16 (that is, moves from the brake state to the lock state). When the lock handle 3 is turned counterclockwise, the lock nut 3 is turned. 5 is separated from the through-hole 16 (that is, it moves from the brake state to the free state).
[0020]
At the time of mounting, the detent 20 is inserted into the gap between the recesses on both sides along the through hole 16 of the thick portion 17 and the cut-and-raised end 23 of the slit of the upper column 1.
[0021]
The brake spring 7 is mounted in the handle collar portion 4 of the lock handle 3 and around the bolt portion 15, and the bolt portion 15 is inserted into a through hole 18 provided in the thick portion 17 of the lower support 2, and The bolt portion 15 is inserted into the slit 14 of the support 1, and in this state, the lock nut 5 to which the brake rubber 6 is attached is screwed and fixed to the tip of the bolt portion 15.
[0022]
(Stored state (A))
In a state where the upper column 1 is stored in the lower column 2 (not shown), the notch pin 9 is located at the lower end together with the upper column 1. At this time, the brake spring 7 returns to the initial state, and the return force causes the bolt portion 15 to rotate in the through hole 16 of the thick portion 17, and accordingly the lock handle 3 also rotates, thereby lowering the upper support 1. It is sandwiched between the thick portion 17 of the support 2 and the brake rubber 6 of the lock nut 5, and is held in the brake state (C) so that the contact state between the upper support 1 and the lower support 2 does not change when no force is applied. (The brake state in FIG. 2C).
(Stored state (A) → extended state (B))
From the stowed state (A), the bolt 15 is rotated in the through hole 16 while turning the lock handle 3 counterclockwise with one hand to tighten the brake spring 7, and the brake state is released. The support is made movable and the upper support 1 is lifted with the other hand. At this time, the bolt 15 can be moved along the slit 14 of the upper column 1. When you lift the upper support 1 as it is,
The notch buckle pin 9 is fixed to the other side of the elastic notch buckle spring 10 having one side fixed to the upper column 1. The notch pin 9 provided via the notch spring 10 drops into the through hole 18 provided in the thick portion 17 of the lower support 2 to stop the lifting operation. At this time, the notch button 8 held in the pushed position by the fastening force of the button spring 11 in the through hole 18 is pushed out so as to be displayed by the notch texture pin 9 falling into the through hole 18, and rises from the surface of the thick portion 17. Move to the stop position and stop.
[0023]
When the lock handle 3 is released from the lock handle 3 in this state, the lock handle 3 is rotated clockwise by the force of the tightened brake spring 7 returning in the clockwise direction. The upper support 1 is pressed against the lower support 2 by the lock nut 5 and the brake rubber 6 to bring the brake state (C) (the state before the notch button in the brake state of FIG. 2C is pressed). I do.
(Brake state (C) → Lock state (D))
As shown in FIG. 2D, the lock handle 3 is grasped and further turned clockwise to change from the temporary brake state (C) to the locked state (D), which can also be called final tightening for safety. Move. At this time, the turning operation force of the lock handle 3 acts to turn the bolt portion 15 in the through hole 16, and further moves the lock nut 5 with the brake rubber 6 from the brake state (C) to the lower support 2. The upper strut 1 is strongly pressed against the lower strut 2 by pulling to the side, and a locked state (D) is obtained.
(Locked state (D) → unlocked state (e) → stored (a))
When the notch button 8 is pushed into the through hole 18 from the locked state (D), the inclined portion 19 at the tip of the notch pin 9 is pushed by the inclined portion 19 at the tip of the notch button 8. At this time, the notch buckle pin 9 is pushed obliquely, and the notch buckle pin 9 rotates according to the rotation of the notch buckle spring 10 fixed at one end side, comes off with a slight displacement, and is caught by the opening edge of the through hole 18. . From this state, the upper column 1 is grasped with one hand, and the lock handle 3 is turned counterclockwise with the other hand to rotate the bolt portion 15 in the through hole 16 as shown in FIG. Then, the lock nut 5 with the brake rubber 6 is changed from the lock state (D) to the free state (F) beyond the brake state (C). While holding the lock handle 3 in the free state (F), lower the upper support 1 into the lower support 2, release the lock handle 3 at the position where the upper support 1 is fully lowered, and raise the upper support 1 by the return force of the brake spring 7. The support 1 and the lower support 2 are held in the brake state (C).
(When moving and ensuring safety)
From the brake state (C), the lock handle 3 is further forcibly rotated in the clockwise direction in which the brake spring 7 is loosened. As a result, the bolt 15 rotates in the through hole 16, so that the lock nut 5 with the brake rubber 6 presses the upper support 1 more strongly from the brake state (C) toward the lower support 2 from the brake state (C) to the lock state (D ).
[0024]
The transition to an arbitrary state is a combination of those described above.
[0025]
The lock mechanism of the present invention has the following features.
(1) Regarding the “notch mechanism” Since the notch button 3, the button spring 11, the notch mechanism pin 9, and the notch mechanism spring 10 have a notch determining mechanism, when the nesting type upper support 1 is extended from the lower support 2, it is easily and easily moved to the extended position. Positioning can be performed accurately, and positioning can be easily released.
[0026]
Specifically, a notch texture spring 10 provided with a notch texture pin 9 is fixed to the upper support 1. The lower support 2 is provided with a through hole 18 through which the notch button 8, the notch texture pin 9, and the pot spring 11 easily operate. The spring force of the pot spring 11 is set to be sufficiently weaker than the spring force of the notch spring 10. The notch button 8 is always subjected to force in the direction of the upper column 1 (inward) by the button spring 11. A force is applied to the notch pin 9 by the notch spring 10 in the direction of the lower column 2 (outward). When the notch button 8 is pressed from the positioning state of the notch texture pin 9 provided on the notch texture spring 10 and fixed to the lower end of the upper pillar 1, the notch texture pin 9 is disengaged from the through hole 18 of the lower pillar 2 and the upper pillar 1 operates freely. It is possible to do. When the upper column 1 is extended from the stored state, the notch pin 9 slides on the inclined portion 19 of the lower column 2, and when it reaches the position of the through hole 18, it falls into the through hole 18, and the upper column 1 is locked. Become.
(2) Regarding "notch texture state display function" In the notch determination mechanism including the notch button 3, the button spring 11, the notch texture pin 9, and the notch texture spring 10, the notch determination state is displayed by the protruding state of the notch button 3. The state of the above (1) in which the upper column 1 is extended and the state in which the upper column 1 is contracted can be clearly recognized.
[0027]
Specifically, the tip of the notch button 8 has an obliquely processed shape. The tip of the notch pin 9 has an obliquely processed shape. In the description of the operation of (1) “notch texture function”, when the notch button 8 is pushed into the through hole 18 from the locked state, the tip oblique portion of the notch texture pin 9 is pushed. At this time, the notch texture pin 9 is pushed obliquely, and comes off while being slightly shifted from the opening edge of the through hole 18 of the lower support 2. The notch texture pin 9 is kept out of the through hole 18, and remains in the state even if the hand is released from the notch button 8. The difference between the state in which the notch button 8 has entered the lower column 2 and the state in which the notch button 8 has jumped out of the positioning state also serves as a display button that can be confirmed from the outside.
(3) Regarding the "lock function" Since the locked state is maintained by the lock handle 3, the handle collar portion 4, the lock nut 5, the brake rubber 6, and the bolt portion 15, the nested upper support 1 from the lower support 2 is moved. When extended, both columns are strongly and securely tightened so that wobble and the like do not occur.
[0028]
Specifically, the lock handle 3 and the handle collar 4 are combined and fastened together. Further, a bolt 15 is fixed to the tip of the lock handle 3. The lock nut 5 and the brake rubber 6 are adhered by an adhesive or the like. The lock nut 5 with the brake rubber 6 is fixed to the tip of the bolt 15. The lock handle 3 is rotated clockwise to rotate the bolt 15 in the through hole 16, and the lock nut 5 with the brake rubber 6 is tightened to the lower support 2 via the upper support 1. Both columns are strongly tightened and fixed by strong clamping force.
(4) Regarding the "brake function" item The brake mechanism is constituted by the lock handle 3, the handle collar 4, the lock nut 5, the brake rubber 6, the brake spring 7 and the bolt 15, so that the lower support 2 is telescopic. When the lock 1 is unlocked by operating the lock handle from the locked state where the support 1 is extended and the upper support 1 is to be contracted, that is, when the upper support 1 and the lower support 2 are in a free state, the lock handle is erroneously set. The brake can be applied so that the upper support 1 does not move on its own, even if the hand 3 is released.
[0029]
Specifically, one end of the brake spring 7 is fitted and fixed in a concave portion of the lower support column 2, and the other end is fitted and fixed in a hole of the handle collar portion 4.
In a free state in which the lock handle 3 is rotated fully counterclockwise (restricted by the twist stopper), the upper column 1 can freely expand and contract.
[0030]
When the lock handle 3 is released from the lock handle 3 in the free state, the lock handle 3 rotates clockwise due to the return force of the brake spring 7, and the tightening force on the lock nut 5 with the brake rubber 6 and the return force of the brake spring 7 Stop at a balanced angle.
[0031]
A feature of the present invention is that even if the lock handle 3 is released by mistake, the brake is actuated by the brake spring 7 and the function of preventing the upper support 1 from moving freely is obtained.
[0032]
【The invention's effect】
According to the present invention, a brake mechanism is constituted by a lock handle, a handle collar portion, a lock nut, a brake rubber, a brake spring, and a bolt portion, and a brake function can be operated at all times, and a lock function can be operated if necessary. If you release your hand like this, there is no danger that the upper support will suddenly fall, and you can always keep the brake working.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a lock mechanism applied to a telescopic columnar body of the present invention.
FIG. 2 is an operation explanatory view of a lock mechanism applied to the telescopic columnar body of the present invention.
FIG. 3 is a configuration diagram of a detent and a rake spring used in the lock mechanism of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper support 2 Lower support 3 Lock handle 4 Handle collar 5 Lock nut 6 Brake rubber 7 Brake spring 8 Notch button 9 Notch texture pin 10 Notch texture spring 11 Button spring 12 Rotation range stopper 13 Brake spring fixing part 14 Slit 15 Bolt part 16 Through hole 17 Meat Thick portion 18 Through hole 19 Inclined portion 20 Detent 21 Through hole 22 Screw 23 Cut and raised end

Claims (5)

One member is slidably provided with the other member slidably provided, a lock handle having one end provided with a bolt portion having a lock nut fixed thereto, and a brake spring, and the one member has a through hole. Providing a thick part to be formed, inserting the bolt part into the thick part, fixing the lock nut by loosely inserting the slit part of the other member on the side opposite to the lock handle side of the bolt part, The brake spring is locked between the lock handle and the one member, and the tightening force of the lock nut and the return force of the brake spring in a state where the hand is released from the lock handle are slidable. A lock mechanism, wherein a brake is set between the two members provided. 2. The lock mechanism according to claim 1, wherein said brake spring is constituted by a torsion spring. The other member has a notch knurled spring having a notch knurled pin protruding at one end, a through hole is provided in the one member, a notch button is inserted into the through hole, and the notch button is inserted into the through hole. 2. A button spring is provided on the second member, and the notch pin is dropped into the through hole in accordance with a sliding operation of the other member, so that the notch button is pushed out against the spring force of the button spring. Or the lock mechanism according to 2. The tip of the notch texture pin and the tip of the notch button are formed in an inclined portion, and the notch texture pin is obliquely pushed by pressing the inclined portion of the notch texture pin with the inclined portion of the notch button, thereby forming an opening edge of the through hole. The locking mechanism according to claim 3, wherein the locking mechanism is locked. A locking mechanism for a telescopic column, wherein the two members according to any one of claims 1 to 4 are an upper column and a lower column of the telescopic column.

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