JP5049319B2 - Floor lock - Google Patents

Description

  The present invention relates to an improvement in a floor lock used for fixing a carriage or the like equipped with a suspension such as a caster at a desired position.

Conventionally, as shown in, for example, Japanese Utility Model Publication No. 53-52767, a floor lock has a cylindrical stand, a push-up body that can be moved up and down on the same axis with respect to the stand, and an interposition between the stand and the push-up body. And a compression spring that urges the push-up body upward, a shaft that is provided in a horizontal axis with respect to the stand and that has a shaft end protruding outside, a foot member at one end, and the shaft at the other end A lock pedal lever having a parallel-shaped first pin and comprising a dog-shaped arm formed between the stepping member and the first pin and swingably connected about the axis; and the push-up body A second pin provided in parallel with the first pin through a bearing piece at the bottom of the table provided at the upper end of the table, and formed in parallel with the lock pedal lever so as to fit the first pin and the second pin, L shape arranged in parallel with the lock pedal lever The push-up body and the stand extend through the link piece according to the depressing operation of the lock pedal lever, and from this state, the first pin passes on a straight line connecting the second pin and the shaft, and The first pin of the lock pedal lever is brought into contact with the push-up body so as to be in a locked state. When the lock is released, the foot member of the lock release pedal lever is up, and when the lock is released, the foot member of the lock pedal lever is up. Is on top, making it easier for the user to operate.
At this time, the lock release pedal lever is pivotally attached to the first pin and the second pin. During operation, the lock release pedal lever rotates in the forward direction and the reverse direction using the second pin as a fulcrum. Accordingly, the lock release pedal lever is also displaced at the same time.
Here, since the lock pedal lever and the lock release pedal lever are arranged in parallel, at the time of operation, the lock pedal lever and the lock release pedal lever cross each other with their rotation directions reversed.
In particular, when the lock is released, the pedals may suddenly cross each other due to the repulsive force of the compressed spring.
In the above device, the lock release pedal lever is formed with an arc-shaped long hole so as to allow the release pedal to turn in the stepping direction, and the position of the lock release pedal lever is held at substantially the same position. Since the position of the lock release pedal lever is almost constant and the lock pedal lever and the lock release pedal lever partially overlap when releasing the lock, the same problem remains.
In view of this, the present inventor has disclosed a plate-like support in Japanese Patent Laid-Open No. 2006-240504 as a floor lock in which the lock release pedal lever is not directly interlocked with the link piece so that the object is not pinched strongly when the lock is released. A telescopic stand with an upper end and a biased upward, pivotally attached to the stand by a first pin and extending back and forth beyond the stand, and abuts the stand at the rear end A lock pedal lever to which a possible lock pin is attached and a step part is attached to the front end side, and the lock pedal lever are arranged on the outer side along with the lock pedal lever, and the rear end side is pivotally attached to the back surface of the support part by a second pin A lock release pedal lever, a link piece spanned between the second pin and the lock pin and pivotally connected thereto, and the lock release pedal lever contacts the link piece. And a biasing means that is spanned between the lock pin and the lock release pedal lever and biases the lock release pedal lever in a direction approaching the lock pin. Proposal of locks, with appropriate results.

Refer to Fig. 1 of No. 53-52767 JP 2006-240504 A

  As a result of further research, the inventor has reduced the stroke of the lock release pedal lever and formed the lock pedal lever in a substantially square shape so as to intersect the lock pedal lever when operating the lock release pedal lever. The object of the present invention is to provide a floor lock that prevents a finger or object from being pinched strongly when the lock is released.

In order to solve the above problems, the present invention provides a floor lock according to claim 1,
An extendable / retractable stand that urges the movable part having a support part at the upper end upward with respect to the fixed main body part;
The midway part is pivotally attached to the fixed part of the stand part with a first pin, both ends extend forward and backward beyond the stand part, and a lock pin provided at a position above the first pin is provided at the rear end part. A lock pedal lever having a step portion attached to the front end;
A lock release pedal lever having both ends extending forward and backward beyond the stand portion at a position above the lock pedal lever, a rear end portion pivotally attached to the support portion by a second pin, and a step attached to the front end portion;
A pin receiving portion that is formed on the lower surface of the lock release pedal lever, and abuts against the lock pin of the lock pedal lever when unlocked to displace the lock pin in the unlock direction;
A link piece having one end fixed to the second pin and the other end pivoted to the lock pin, and swinging around the second pin;
It is spanned between the lock pedal lever and the lock release pedal lever, the lower part is pivotally attached between the first pin and the lock pin of the lock pedal lever, and the upper part is pivotally attached at a position spaced apart from the second pin. A follower link piece that pivots the lock release pedal lever at a pivot angle smaller than the pivot angle of the lock pedal lever in conjunction with the pivot of the pedal lever in the lock direction;
The follower link piece is provided at a pivoted position with the lock pedal lever so as to be slidable with respect to the pivot projecting from the lock pedal lever. A slot that can pivot about the pin,
Biasing means for biasing the lock pedal lever and the lock release pedal lever to the standby positions in the upward direction,
The lock pin is provided so as to be displaced to a lock position in front of a line connecting the first pin and the second pin and a lock release position in the rear.
In the invention of claim 2,
The link piece is formed in a substantially U-shaped cross section consisting of a pair of left and right side plates and an upper continuous piece extending in series above the side plates, and the upper portions of the left and right side plates serve as second pins. It is pivotally attached, and the lower part is pivotally attached to the lock pin.
The pivot point of the second pin is disposed inside the pivot point of the lock release pedal lever with respect to the second pin.
Furthermore, in the invention of claim 3,
The driven link piece is formed of a plate bent in a substantially reverse letter shape so as not to collide with the lock pin.

  In the present invention, since the driven link piece is spanned between the lock pedal lever and the lock release pedal lever and pivotally mounted, the lock release pedal lever is interlocked via the driven link piece when the lock pedal lever is depressed in the lock direction. Therefore, the lock release can be performed by depressing the lock release pedal lever in the tilted standby position, and the unlocking operation can be extremely facilitated.

FIG. 1 is a partial cross-sectional view of a floor lock embodiment in an unlocked state. FIG. 2 is a side view showing the locked state. FIG. 3 is a side view when the lock release pedal lever is operated to release the lock from the locked state. FIG. 4 is a side view of the unlocked state. FIG. 5 is a plan view of the same. FIG. 6 is a front view of the same. FIG. 7 is a side view seen from the opposite side of FIG. FIG. 8 is a partially enlarged view of the connection between the driven link, the lock release pedal lever, the link, and the lock pedal lever, with a part broken away.

According to the present invention, a long hole is provided in the lower part of the follower link piece pivotally attached to the upper part of the lock pedal lever so as to be pivotally attached to the pivot axis of the lock release pedal lever, and the lock release lever is interlocked with the lock pedal lever. Realization of improved performance.
Hereinafter, preferred embodiments of the floor lock of the present invention will be described with reference to the drawings.

A floor lock 1 shown in FIGS. 1 and 2 includes a plate-like support portion 2 at its upper end and an extendable stand portion 3 biased upward, and a lock pedal lever 4 pivotally attached to the stand portion 3. And a lock release pedal lever 5 arranged side by side on the outside of the lock pedal lever 4 and pivotally attached to a bracket 21 whose rear end protrudes downward from the support portion 2, the tip of the lock pedal lever 4, and the bracket 21 and a link piece 6 pivoted between 21 and 21 and a driven link piece 7 spanned between the lock pedal lever 4 and the lock release pedal lever 5 and pivoted at both ends. Yes.
In this embodiment, the left side in the figure is the front and the right side is the rear.

[Stand]
The stand portion 3 is composed of a movable portion and a main body portion. The main body portion includes a base portion 31 provided with a rubber seat on the bottom surface, a stem 32 standing on the base portion 31, and an inner portion supported by the stem 32. It consists of a cylindrical portion 33.
The movable part is formed of an outer cylinder part 34 that is externally fitted to the inner cylinder part 33 and can be moved up and down relatively. The plate-like support part 2 is fixed on the outer cylinder part 34.
The base portion 31 has a ball seat 35 integrally on the upper surface thereof, and a spring receiver 36 provided at the lower end of the inner cylinder portion 33 is supported at a spaced position by the stem 32, and an outer spring 37 is removed from the stem 32. It has a known configuration in which an outer spring 37 that is fitted and compressed between the base portion 31 and the spring support 36 is built in.

And between the inner cylinder part 33 and the outer cylinder part 34, coil spring S1 is incorporated as a compression spring of an urging means.
The upper end of the coil spring S1 is hooked on the top wall of the outer cylindrical portion 34 fixed to the support portion 2, and the lower end is hooked on a first pin P1 that penetrates the inner cylindrical portion 33 horizontally. .
As a result, when the coil spring S1 is extended, the outer cylinder part 34 is extended from the inner cylinder part 33 while increasing the repulsive force, and the stand part 3 is extended as shown in FIG.
Further, the outer cylinder part 34 is formed with a semicircular cutout part 34a at the lower end edge part, and can be fitted to the first pin P1 projecting from the inner cylinder part 33 when the outer cylinder part 34 is lowered. It is like that.

[Lock pedal lever]
Next, a lock pedal lever 4 is attached to a middle position of the stand portion 3 so that an intermediate portion is pivotally attached by a first pin P1 and extends back and forth beyond the stand portion 3.
In this embodiment, the lock pedal lever 4 has a substantially square shape, and a bent portion at an intermediate position thereof is pivotally attached to the first pin P1 and extends upward. Lever body 41, a lock pin P3 that is installed to be spanned between the rear ends of the pair of lever bodies 41, and a step portion 42 that is spanned and attached to the front of the pair of lever bodies 41. Yes.

The lock pin P3 is set so as to be always at a position above the first pin P1 on the rear end side of the lock pedal lever 4.
As described later, the lock pin P3 collides with the outer peripheral wall of the outer cylindrical portion 34 of the stand portion 3 when the step portion 42 of the lock pedal lever 4 is depressed to extend the stand portion 3, and the lock pin P3 is locked. Further rotation of the pedal lever 4 is restricted, and the extended posture of the stand unit 3 is maintained.
Both ends of the first pin P <b> 1 protrude outward from the inner cylinder portion 33 to the stand portion 3, and are pivotally attached at positions below the central bent portions of the pair of lever bodies 41 of the lock pedal lever 4. It is a pivot point of the lock pedal lever 4.

[Lock release pedal lever]
Next, the lock release pedal lever 5 is arranged side by side outside the lever body 41 on one side of the lock pedal lever 4.
In the case of the illustrated example, the lock release pedal lever 5 includes a single lever-like release pedal body 51 disposed on one side of the stand portion 3 and a step of the lock pedal lever 4 by bending the front of the release pedal body 51. The part 42 is composed of a step piece part 52 extending outwardly perpendicular to the extending direction of the lever at a spaced position.
Reference numeral 55 denotes a stopper that abuts against the back surface of the support portion 2 to restrict the rotation of the lock release pedal lever 5 in the counterclockwise direction in the drawing.
The lock release pedal lever 5 is pivotally attached by a second pin P2 to a bracket 21 whose rear end protrudes from the back surface of the support portion 2.

[Link piece]
Next, both ends of the link piece 6 are pivotally attached to the lock pin P3 and the second pin P2.
The link piece 6 is formed in a substantially U-shaped cross-section in which a pair of left and right side plates 61 are connected by horizontally extending pieces. The upper part of the left and right side plates 61 is pivotally attached to the second pin P2, and the lower part is locked. It is pivotally attached to pin P3.

Here, the second pin P2 is horizontally stretched between a pair of left and right brackets 21 depending on the back surface of the support portion 2 and protrudes outward (see FIGS. 1 and 6).
The pair of left and right upper portions of the link piece 6 is first pivotally attached to the second pin P2 outside the bracket 21, and the distal end side of the lock release pedal lever 5 is coaxially attached to the outside thereof. The pivot point of the link piece 6 with respect to the pin P2 is disposed on the inner side with respect to the pivot point of the lock release pedal lever 5.

[Spring]
The lock release pedal lever 5 is provided with urging means for urging in the standby position direction extending along the support portion 2.
In this embodiment, a spiral spring S2 wound around the second pin P2 and having one end hooked on the back surface of the support portion 2 and the other end hooked on the lock release pedal lever 5 is attached. The pedal lever 5 is urged in a standby position direction that assumes a substantially horizontal posture.
In addition, a spiral spring (not shown) is attached to the first pin P1, and one end is hooked on the lock pedal lever 4 to urge the first pin P1 toward the standby position, which is similarly in a substantially horizontal posture.

[Following link piece]
Next, a driven link piece 7 is stretched between the lock pedal lever 4 and the lock release pedal lever 5.
The follower link piece 7 is made of a plate bent in a substantially reverse shape so as not to collide with the lock pin P3 when the stand portion is extended, and the upper part is halfway along the inner wall surface of the lock release pedal lever 5. It is pivotally mounted at a position by a pivot P4, and the lower part is pivotally mounted by a pivot P5 which is disposed near the lock pin P3 between the first pin P1 and the lock pin P3 of the lock pedal lever 4 and protrudes outward. (See FIGS. 1 to 4 and FIG. 8).

Here, the pivot P5 of the lock pedal lever 4 is fitted into a long hole 8 formed in the lower portion of the driven link piece 7.
Since the driven link piece 7 is slidably mounted on the pivot P5 by the long hole 8, the lock release pedal lever 5 tilted in conjunction with the lock release pedal lever 5 shown in FIG. The hole 8 can be tilted downward with the length of the hole 8 as the maximum stroke, with the second pin P2 as a fulcrum.

Therefore, when the stepped portion 42 is pushed down with the lock pedal lever 4 having the first pin P1 as a fulcrum, the driven link piece 7 is interlocked with the lock release pedal lever 5 with the second pin P2 as a fulcrum. The lock pedal lever 4 is rotated at an angle smaller than the rotation angle of the lock pedal lever 4 in the same direction as the lever 4.
At this time, the pivot P5 is located at the lower end of the long hole 8 of the driven link piece 7.
Then, since the posture in which the lock pedal lever 4 is slightly inclined is a standby posture for releasing the lock, the user can easily insert his / her foot for pedal operation.

In the stand-by posture for releasing the lock as described above, the pivot P5 is positioned at the lower end of the long hole 8 as shown in FIG. 2, so that it collides with the pivot P5 within the range of the length of the long hole 8. The unlocking lever 5 can be pushed further down (see FIG. 3).
When the lock release pedal lever 5 is pushed, the stand portion 3 is displaced in the shortening direction.

[Pin position]
Here, the first pin P1 is fixed to the inner cylinder portion 33, and the second pin P2 is fixed below the support portion 2. However, the positions of the first pin P1 and the lock pin P3 by the expansion and contraction of the stand portion 3 are as follows. Change.
The biasing force applied by the coil spring S1 built in the stand portion 3 is such that the lock pin P3 is displaced with respect to the line L connecting the first pin P1 and the second pin P2, and the line L When it comes to the point, it becomes a thought point, and when this line L is exceeded, the biasing force works in the direction beyond it.

Therefore, as described above, when the lock pedal lever 4 reaches the lock position shown in FIG. 2 in which the lock pin P3 is displaced to the forward position beyond the thought point, the lock pedal lever 4 is urged in the lock direction. Therefore, the locked posture can be maintained.
Here, the lock pin P3 is not displaced further forward because the outer cylinder portion 34 serves as a stopper.

Here, the lower surface of the lock release pedal lever 5 is provided with a notch formed in a step shape for receiving a pin that abuts with the lock pin P3 of the lock pedal lever 4 at the time of locking. Yes.
Therefore, when the lock release pedal lever 5 is depressed to the dotted line position in the drawing in the lock posture shown in FIG. 2, the operating portion 13 formed at the lower end of the lock release pedal lever 5 pushes the lock pin P3.
As a result, the link piece 6 rotates counterclockwise in the figure with the second pin P2 as a fulcrum.
Due to the rotation of the link piece 6, the lock pin P3 moves backward beyond the line L between P1 and P2 (see FIG. 3).
At the same time, the lock pedal lever 4 is rotated clockwise with the first pin P1 as a fulcrum by the operation of the link piece 6 so that the step portion 42 is substantially aligned with the lock release lever 5 or displaced to a high position. The release position is reached (see FIG. 1).

Further, when the step part 42 of the lock pedal lever 4 is stepped down from the lock release position, the link piece 6 is interlocked, and when the lock pin P3 exceeds the line L between P1 and P2, as shown in FIG. The lock pedal lever 4 is urged counterclockwise in the figure.
Then, the lock pin P3 can abut the outer cylinder portion and lock the position of the lock pedal lever 4.

In this embodiment, since the lock release pedal lever 5 is operated within the length range of the long hole 8, the tilt angle for unlocking may be small.
Accordingly, the lock release pedal lever 5 and the lock pedal lever 4 do not cross each other when the lock release lever 5 is further tilted from the tilted posture and the lock pedal lever 4 is unlocked.

Further, in this embodiment, the lock pedal lever 4 is formed in a hollow shape whose center is recessed downward, and is always wide open with the support portion 2, so there is no fear of pinching a finger or the like.
Further, as shown in FIG. 5, the lock pedal lever 4 and the lock release pedal lever 5 do not overlap the step portions 42 and 52 and the lever portion, so that there is no possibility of pinching a finger or an object.
The present invention is not limited to the above-described embodiments, and it is needless to say that various design changes can be made according to the application without changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Floor lock 2 Support part 3 Stand part 4 Lock pedal lever 5 Lock release pedal lever 6 Link piece 7 Driven link piece 8 Long hole 21 Bracket 31 Base part 32 Support leg part 33 Inner cylinder part 34 Outer cylinder part 35 Ball seat 36 Spring support 37 Compression spring
41 Lever main body 42 Step part 51 Release pedal main body 52 Step piece part 61 Side plate 62 Connected piece S1 Spring S2 Spring

Claims (3)

An extendable / retractable stand that urges the movable part having a support part at the upper end upward with respect to the fixed main body part;
The midway part is pivotally attached to the fixed part of the stand part with a first pin, both ends extend forward and backward beyond the stand part, and a lock pin provided at a position above the first pin is provided at the rear end part. A lock pedal lever having a step portion attached to the front end;
A lock release pedal lever having both ends extending forward and backward beyond the stand portion at a position above the lock pedal lever, a rear end portion pivotally attached to the support portion by a second pin, and a step attached to the front end portion;
A pin receiving portion that is formed on the lower surface of the lock release pedal lever, and abuts against the lock pin of the lock pedal lever when unlocked to displace the lock pin in the unlock direction;
A link piece having one end fixed to the second pin and the other end pivoted to the lock pin, and swinging around the second pin;
It is spanned between the lock pedal lever and the lock release pedal lever, the lower part is pivotally attached between the first pin and the lock pin of the lock pedal lever, and the upper part is pivotally attached at a position spaced apart from the second pin. A follower link piece that pivots the lock release pedal lever at a pivot angle smaller than the pivot angle of the lock pedal lever in conjunction with the pivot of the pedal lever in the lock direction;
The follower link piece is provided at a pivoted position with the lock pedal lever so as to be slidable with respect to the pivot projecting from the lock pedal lever. A slot that can pivot about the pin,
Biasing means for biasing the lock pedal lever and the lock release pedal lever to the standby positions in the upward direction,
The floor lock, wherein the lock pin is provided so as to be displaced to a lock position in front of a line connecting the first pin and the second pin and a lock release position in the rear. The link piece is formed in a substantially U-shaped cross section consisting of a pair of left and right side plates and an upper continuous piece extending in series above the side plates, and the upper portions of the left and right side plates serve as second pins. It is pivotally attached, and the lower part is pivotally attached to the lock pin.
2. The floor lock according to claim 1, wherein the pivot point of the second pin is disposed inside the pivot point of the lock release pedal lever with respect to the second pin.   The floor lock according to claim 1, wherein the driven link piece is formed of a plate bent in a substantially reverse letter shape so as not to collide with the lock pin.

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