JP2508944Y2 - Rock stay for tiltable shelf support - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention holds, for example, a shelf which can be tilted from a horizontal position to a tilted position at a desired angle (hereinafter referred to as a tiltable shelf) in a tilted position (tilt limit position), or The present invention relates to a lock stay used for an application in which it can be returned to its original horizontal position.

[0002]

2. Description of the Related Art Conventionally, tiltable shelves have been used in various fields, and lock stays have been used for supporting the shelves. For example, in a factory, a so-called flip-up trolley provided with multi-stage tiltable shelves is conveniently used for cargo handling work for moving and storing products or semi-finished products and parts. The hoisting truck starts unloading from the top shelf,
The shelves that have been unloaded are tilted so that they immediately jump upwards, facilitating the unloading work of the lower shelves (see FIG. 1).
On the other hand, loading work starts loading work in order from the bottom shelf while the upper shelves are kept tilted upward to prevent the upper shelves from interfering with the loading work and to finish loading each time. Then, keep the shelves directly above and keep loading.

Depending on such a situation, the lock stay supporting the tiltable shelf is an important element. Conventionally, actual fair 1-2
The lock stay described in Japanese Patent No. 4413 or Japanese Utility Model Publication No. 1-241414 is known and put to practical use. These can be raised and lowered with the tilting of the tiltable shelf, and the shelf can be held at the tilt limit position in a stable state or returned to the original horizontal position.

In order to briefly explain a conventionally known lock stay, main parts are illustrated in FIGS. 5 and 6. Main frame 11
A curved guide groove 18 that is curved upward with the same groove width is formed in series at the terminal end of the guide groove 17 that is linearly provided in the longitudinal direction. The roller 40 moving in the guide groove 17 is
When passing through the curved portion 46 that changes to the curved guide groove 18, the restraining corner portion 45 of the lock piece 12 is pushed away to proceed. Then, when the roller 40 has completely entered the curved guide groove 18, the lock piece 12 is restored by the tensile force of the spring 34, and the restraining corner portion 45 is again ejected to the curved portion 46 of the curved guide groove 18. The lower surface of the roller 40 is restrained, and the shaft portion 39 of the roller 40 is locked so as to abut against the curved portion 46 (FIG. 5). Therefore, the lock stay holds the tiltable shelf at the tilt limit position. On the other hand, in order to release the locked state, the element including the roller 40 is once pulled back to the front of the curved guide groove 18 (left in FIG. 5). Then, the lock piece 12 is in the same direction via the receiving groove 33 that is in contact with the roller 40 (this receiving groove 33 is formed in a series with the restraining corner portion 45 on the lock piece 12. See FIG. 6). (Leftward in FIG. 5). When the movement of the lock piece 12 reaches a certain stroke in this manner, the bracket 22 at the intermediate position is supported by the shaft 23, and the lever 15 is constantly receiving the rotational force by the spring 25.
As shown in FIG. 6, the tip end 26 of the lock piece 12 abuts on the right side edge 28 of the lock piece 12, and at this time, the lock piece 12 is in a state in which it cannot return to the right side even though it receives the tensile force of the spring 34. As a result, as shown in FIG. 6, the roller 40 moves from the curved guide groove 18 to the guide groove 17 in an unlocked state in which there is no obstacle to the movement of the roller 40, and the roller 40 smoothly returns to the guide groove 17. When the roller 40 passes under the working end 24 of the lever 15 and returns, the working end 24 is pushed up a little, so that the other end (tip 26) is disengaged from the right side edge 28 of the locking piece 12, and the locking piece 12 is locked. Is spring 3
By the function of 4, it returns to the right.

[0005]

The above-mentioned conventionally known lock stay has many points which should be satisfied in terms of its function or action and effect. On the other hand, the unlocking operation is
The roller 40 has to be retracted so as to be pulled back toward the curved guide groove 18, and there is also the trouble that the effectiveness of unlocking cannot be obtained unless the stop action of the lock piece 12 by the lever 15 works perfectly. , Operation was troublesome. Further, on the premise of the unlocking operation as described above, the curved guide portion 18 has to be formed in a series in the guide groove 17, the lever 15 is indispensable, and the molding of the lock piece 12 is difficult. However, the processing and assembling are troublesome and time-consuming, and there are drawbacks and problems such as a large number of parts, which are problems to be solved.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an improved lock stay which is easier to operate and simpler in construction.

[0007]

As a means for solving the above-mentioned problems of the prior art, a lock stay for tiltable shelf support according to the present invention is shown in FIGS. 1 to 4 of the drawings. as, times to the still frame that make up the skeleton of the truck, etc.
Moving freely turned accompanied undulating operation the tilting of attached tiltably shelves a, there is also freely lock stay that holds the tiltable shelves a to recline limit position, or back to the original position, the horizontal direction a main frame 1 form of an elongated plate which is attached to arranged the stationary frame b is fixed to the stationary frame b and same horizontal direction, <br/> frame constituting the framework of the tiltable shelf a one end Combination with a rod-shaped stay main body 5 which is rotatably connected to the material c, and the roller 3 provided at the other end is movably connected to the guide groove of the main frame 1 and cannot be removed. Consists of

A linear guide groove 4 is formed in the main frame 1 in the longitudinal direction thereof, and a slanting cam portion 6a that taps into the guiding groove 4 and gradually narrows the groove width and a terminating end 6c of the slanting cam portion 6c. The plate-shaped lock lever 6 having the lock portion 6b formed as a recess in the guide is provided in the main frame 1.
Mounted at a position near the end of the groove 4 by a support shaft 7 so that it can rotate.
The lock lever 6 is configured to be able to move in and out in the groove width direction of the guide groove 4 with the support shaft 7 as a fulcrum , and the lock lever 6 is moved by the spring 9 in the direction in which the inclined cam portion 6a is pushed into the groove. Is provided with positioning means 8 for defining a limit position where the inclined cam portion 6a of the lock lever 6 is pushed into the groove.

According to the present invention, a circular arc portion 4a having a size (inner diameter) that allows the roller 3 of the stay body 5 to be inserted and removed is formed at the starting end portion of the guide groove 4 of the main frame 1 in a straight line portion of the guide groove 4.
Also characterized in that is provided, et al in wrapped form with.

[0010]

[Function] A state in which the tiltable shelf a is in a horizontal posture (FIGS. 3 and 4)
When Yuku is tilted inclined position before the uplink as shown in Figure 2 from Yuki and standing stay body 5 by degrees <br/> people become accompanied the movement of the frame member c of the rack a, the stay main body The roller 3 at the other end of 5 moves in the guide groove 4 of the main frame 1 from the start position (FIG. 3) toward the end direction (the opposite end).

[0011] tiltable shelves a approaches its inclined limit position, the roller 3 of the stay body 5 reaches the inclined cam portion 6a emanating except in the groove 4 in the near the end of the guide groove 4, the locking lever The operation (rotational force) of the spring 9 acting on 6 is overcome, and the inclined cam portion 6a is pushed away to proceed.
Then, when it reaches the end 6c of the inclined cam portion 6a, it falls into the lock portion 6b which is a concave portion, and the lock portion 6b is immediately moved by the action of the spring 9 acting on the lock lever 6. 3, the reverse movement is blocked and the lock state is set.

The strength of the lock portion 6b for preventing the backward movement of the roller 3 (the strength of the lock) is as follows.
Of the inclined cam portion 6a (corner portion of the lock portion 6b protruding into the guide groove 4), and the strength of the spring 9 acting on the lock lever 6. It depends on how you like it. The extruding size of the terminal end 6c is defined by the positioning means 8 and the strength of the spring 9 can be adjusted by the adjusting mechanism 10. Therefore, the strength of the lock is properly determined by a design method.

On the other hand, the operation for unlocking the roller 3 is
It is performed by a one-touch operation of simply pushing down the tiltable shelf a. The force to push down the tiltable shelf a is
Through the body 5, the roller 3 is locked by the lock portion 6b of the lock lever 6.
Acts as a force to push down. As shown in FIG. 2, the lock lever 6 (the lock portion 6 of the lock lever 6 provided by the spring 9)
b) When a pressing force (downward rotating force) larger than the upward rotating force (locking strength) is applied to the roller 3, the roller 3
2 gradually pushes down the lock portion 6b of the lock lever 6 and
To the left of the inclined cam portion 6a and finally unlocked by overcoming the end 6c of the inclined cam portion 6a, after which the roller 3 gently returns to the starting end direction in the guide groove 4 and the tiltable shelf a is restored to the horizontal posture.

[0014]

Next, an embodiment of the present invention shown in FIGS. 1 to 4 will be described. FIG. 1 shows the lock stay of the present invention applied to a tiltable shelf a of a flip-up dolly, FIG. 2 shows a locked state in which the tiltable shelf a is supported at a tilt limit position, and FIG. The state where the shelf a is restored to the horizontal posture is shown. The tiltable shelf a forms the frame of the flip-up cart.
Of the vertical and horizontal still frames, the horizontal (horizontal) still frame
It is rotatably attached.

The main frame 1 is as shown in FIG.
It is made of a channel steel-like elongated steel plate material, and a long and narrow linear guide groove 4 is formed in parallel with the longitudinal direction at the center of the web. As shown in FIG. 4, a clamp 14 is welded to the main frame 1 and fixed to the flange of the main frame 1 . The main frame 1, the attached to the stationary frame b of splashing bogie by the clamp 14, the water of the same stationary frame b the same way by tightening the set screw 13 shown in FIG. 2
It is fixed in the horizontal direction.

The stay main body 5 also comprises an elongated rod-shaped steel plate, one end of times by the clamp 2 and the hinge shaft 16
It is movably connected. The clamp 2 is attached to a frame member c that constitutes the framework of the tiltable shelf a, and is shown in FIG.
It is fixed by tightening the set screw 13. The roller 3 is attached to the other end of the stay main body 5,
The roller 3 is movably connected to the guide groove 4 of the main frame 1. The shape of the roller 3 has an annular groove portion in the central portion of the outer peripheral surface thereof, which is slightly wider than the plate thickness of the web of the main frame 1 and slightly smaller than the groove width of the guide groove 4, and the flange ring portions on both sides of the annular groove portion The grooved wheel has a diameter sufficiently larger than the groove width of the groove 4. The roller 3 is attached so that the annular groove portion is fitted to the upper and lower frame edge portions of the guide groove 4 so that the wheel cannot be removed. The roller 3 has a size (inner diameter) that allows the roller to be inserted into and removed from the starting end of the guide groove 4, and the roller 3 and the linear portion of the guide groove 4
It is mounted in the guide groove 4 through the arcuate portion 4a provided by being attached.

The main frame 1 has an inclined cam portion 6a which is squeezed into the guide groove 4 to gradually narrow the groove width linearly, and a semicircular shape at the end 6c of the inclined cam portion 6a. a plate-like lock lever 6 having a series to form a locking portion 6b as concave elliptical as long as it is effective to lock or unlock the other may be a different shape.) is its
Rotate the center of the to the position near the end of the guide groove 4 by the support shaft 7.
It is movably attached. Therefore, the inclined cam portion 6a can be moved in and out in the groove width direction of the guide groove 4.
I have. Further, the lock lever 6, Ri Contact is formed in a crank shape which is bent in the shape of a substantially L is connected to one end of the spring 9 for pulling the input end 6d of the one, the other of the lock lever 6 with The inclined cam portion 6a corresponding to the end is constantly applied with a rotational force in a direction in which the guide groove 4 extends into the groove. However, the size of the inclined cam portion 6a protruding into the groove of the guide groove 4 is properly determined by the positioning means 8 in which the inner corner portion of the lock lever 6 bent into the dogleg shape abuts the flange portion of the main frame 1. It is prescribed.
The other end of the spring 9 is fixed to the main frame 1 via an adjusting mechanism 10. The adjusting mechanism 10 is configured such that a screw shaft 10b is passed through a spring receiver 10a which is fixed to a flange portion of the main frame 1 and vertically protrudes, and the screw shaft 10b is fixed by lock nuts 10c screwed into both sides of the spring receiver 10a. The one end of the spring 9 is connected to one end of the screw shaft 10b. Therefore, by loosening or screwing the lock nut 10c, the screw shaft 10b
Is moved, and the strength of the acting force of the spring 9 is adjusted.

Therefore, the roller 3 which has advanced to the right in FIG. 2 in the guide groove 4 pushes away the inclined cam portion 6a and advances, and its end 6c.
Immediately after passing through, the roller 3 falls into the lock portion 6b, and the roller 3 is locked by the immovable constraint between the end 4b of the guide groove 4 and the lock portion 6b. Therefore, there is no fear that the tiltable shelf a will flap. However, when the roller 3 pushes the lock portion 6b with a force larger than the restraining force of the lock portion 6b, moves to the left in FIG. 2 and separates from the lock portion 6b, the lock is released.

[0019]

[Effects of the Invention] The lock stay for supporting the tiltable shelf according to the present invention has a stable and highly stable locked state for holding the tiltable shelf a at the tilt limit position, and of course, the lock shelf is the original one. The operation of unlocking to return to the posture is also easy and convenient because it is a one-touch operation that only pushes down the shelf strongly, it can be done reliably. Further, the structure of the lock stay itself is extremely simple, the number of parts is small, the man-hours for processing and assembling are also small, the productivity is excellent, and the cost is low.

[Brief description of drawings]

FIG. 1 is an elevational view of a lock stay of the present invention applied to a flip-up bogie in use.

FIG. 2 is a front view of a use state in which a tiltable shelf is tilted.

FIG. 3 is a front view of a use state in which the tiltable shelf is in a horizontal posture.

FIG. 4 is a perspective view of the same use state as in FIG.

FIG. 5 is a front view briefly showing a structure of a conventional lock stay.

FIG. 6 is a front view showing the unlocked state of a conventional lock stay for main parts.

[Explanation of symbols]

a tiltable shelf b stationary frame 1 main frame c frame material 3 roller 4 guide groove 5 stay body 6a tilting cam part 6b lock part 6 lock lever 7 support shaft 9 spring 8 positioning means 4a arc part

Claims (2)

(57) [Scope of utility model registration request] 1. A rotating frame is mounted on a stationary frame which constitutes a frame of a bogie or the like.
In the lock stay, which is raised and lowered in accordance with the tilting of the tiltable shelves currently installed , the tiltable shelves can be held at the tilt limit position or returned to the original position, the lock stays arranged horizontally an elongated plate-like main frame fixed horizontally attached to the stationary frame and the stationary frame <br/> same,
One end is rotatably connected to a frame material that constitutes the frame of the tiltable shelf, and a roller provided at the other end is movably inserted into the guide groove of the main frame and is not wheeled. capable composed of a combination of a rod-shaped stay body being connected, inclined cam to the main frame, the longitudinal direction of the linear guide groove is formed, to narrow gradually the groove width out except in the same guide groove parts and the plate-shaped lock lever having a locking portion formed as a recess at the end of the inclined cam portions, said main frame
It is rotated by a support shaft near the end of the guide groove in the frame.
The lock lever is attached to the guide groove so that the lock lever can move in and out in the groove width direction of the guide groove with the support shaft as a fulcrum. The lock lever springs out the inclined cam portion into the guide groove. A lock stay for tiltable shelves, each of which is provided with a positioning means which receives a rotational force in a directional direction and which defines a limit position at which the tilted cam portion of the lock lever extends into the guide groove. 2. A tiltable shelf supporting roll according to claim 1 .
In X-Stay, at the beginning of the guide groove of the main frame,
Arcuate portion of the roller capable out size of the stay main body is brought
Wherein the are in which we provided with a linear portion and a wrapped shape of the groove guiding the lock stay for tiltably shelf support.