JPH0713816U - Lock stay for tiltable shelf support - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lock stay used for a purpose in which a tiltable shelf can be held in a tilted posture or returned to its original posture. [Structure] The tiltable shelf a is moved up and down with tilting,
It is a lock stay that can hold the shelf a at the tilt limit position or return to the original position, and is an elongated plate-shaped main frame 1 attached to the stationary frame b and fixed in the same direction as the stationary frame b. A rod-shaped member in which one end is rotatably connected to the frame member c of the tiltable shelf a 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. It is composed of a stay 5 and a stay 5. [Effect] The lock state for holding the tiltable shelf a at the tilt limit position is reliable and highly stable. The lock release operation that returns the shelf to its original position is a one-touch operation that only pushes down the shelf strongly, and it is easy and reliable to use, which is extremely convenient and convenient.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention holds, for example, a shelf that can be tilted from a horizontal attitude to a tilted attitude at a desired angle (hereinafter referred to as a tiltable shelf) in a tilted attitude (tilt limit position) or returns to the original horizontal attitude. The present invention relates to a lock stay used for an application that can be freely returned.

[0002]

[Prior art]

 Conventionally, tiltable shelves have been used in various fields, and lock stays have been used to support 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 trolley starts unloading from the top shelf, and the unloading shelf is tilted so as to immediately jump up to facilitate unloading work on the bottom shelf (see Fig. 1). ). On the other hand, in the loading work, the upper shelves are tilted upward and the loading work is started in order from the lowest shelf to prevent the upper shelves from interfering with the loading work and finish the loading work. Continue the loading work with the shelves directly above each horizontal.

[0003] According to the above, the lock stay supporting the tiltable shelf is an important element. Conventionally, the Roxta described in Japanese Utility Model Publication No. 1-244413 or Japanese Utility Model Publication No. 1-244414 is known and has been 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 describe a conventionally known lock stay, main parts are illustrated in FIGS. 5 and 6. A curved guide groove 18 that is curved upward with the same groove width is formed in series at the end of the guide groove 17 that is provided linearly in the longitudinal direction of the main frame 11. The roller 40 moving in the guide groove 17 advances while pushing away the restraining corner portion 45 of the lock piece 12 when passing through the curved portion 46 that changes into the curved guide groove 18. 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. The lower surface of the roller 40 is constrained, 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 contact with the roller 40 via the receiving groove 33 (this receiving groove 33 is formed in series with the restraining corner portion 45 on the lock piece 12. See FIG. 6). Direction (left 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 tip 26 of the lever 15 that constantly receives the rotational force of the spring 25 is locked as shown in FIG. The lock piece 12 is in a state of abutting against the right side edge 28 of 12, and at this time, the lock piece 12 is in a state in which the lock piece 12 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 is in the unlocked state from the curved guide groove 18 to the guide groove 17 without any 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 (the tip 26) is disengaged from the right side edge 28 of the lock piece 12, and the lock piece is released. The spring 12 acts to return 12 to the right.

[0005]

[Problems to be solved by the present invention]

 The above-described conventionally known lock stay has many points to be satisfied in terms of its function or action, but on the other hand, the unlocking operation is performed by retracting the roller 40 toward the curved guide groove 18 once. The operation is troublesome because the lock 15 has to be operated and the stopping effect of the lock piece 12 by the lever 15 must be fully worked to obtain the effectiveness of unlocking. 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, 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.

Therefore, an object of the present invention is to provide an improved lock stay that is easier to operate and has a simpler structure.

[0007]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems of the prior art, the lock stay for supporting the tilting self-supporting shelf according to the present invention, as shown in FIGS. 1 to 4 of the drawings, shows the tilting of the tiltable shelf a. It is a lock stay that can be lifted and lowered to hold the shelf a at the tilt limit position or return to the original position, and is attached to the stationary frame b and fixed in the same direction as the stationary frame b. An elongated plate-shaped main frame 1 and one end of which is rotatably connected to a frame member c of a tiltable shelf a, and a roller 3 provided at the other end of the main frame 1 is movable in a guide groove of the main frame 1. It consists of a combination with a rod-shaped stay 5 that is connected so that it cannot be removed.

A linear guide groove 4 is formed in the main frame 1 in the longitudinal direction thereof, and an inclined cam portion 6 a is squeezed out into the guide groove 4 at the terminal end portion thereof to gradually narrow the groove width. Also, a plate-like lock lever 6 having a lock portion 6b formed as a recess at the end 6c of the inclined cam portion is rotatably attached by a support shaft 7 so as to move in and out in the groove width direction of the guide groove 4, The lock lever 6 receives a rotational force in the direction in which the inclined cam portion 6a is pulled out into the groove by the spring 9, and the positioning means 8 that defines the limit position where the inclined cam portion 6a of the lock lever 6 is pulled out into the groove is provided. Each is characterized by being provided.

The present invention is also characterized in that a circular arc portion 4a having a size (inner diameter) capable of inserting and removing the roller 3 of the stay 5 is formed in series at the starting end portion of the guide groove 4 of the main frame 1. To do.

[0010]

[Action]

 When the tiltable shelf a is tilted from the horizontal posture (FIGS. 3 and 4) to the forward tilting posture as shown in FIG. 2, the stay 5 is gradually moved along with the movement of the frame material c of the shelf. The roller 3 at the other end of the stay 5 moves in the guide groove 4 of the main frame 1 from the starting end position (FIG. 3) toward the terminating end (the opposite end).

When the tiltable shelf a approaches the tilt limit position, the roller 3 of the stay 5 reaches the tilted cam portion 6 a that is protruding into the guide groove 4 near the end of the guide groove 4 and the lock lever 6 is reached. The spring 9 acting against it (rotational force) 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 immediately moves in the guide groove 4 by the action of the spring 9 acting on the lock lever 6. The roller 3 is blocked by its backward movement and becomes in a locked state.

The strength (lock strength) of the lock portion 6 b for preventing the backward movement of the roller 3 is determined by the end 6 c of the inclined cam portion 6 a of the lock lever 6 (the lock protruding into the guide groove 4). The corners of the portion 6b) are determined by the size of the protrusion into the guide groove 4 and the strength of the spring 9 acting on the lock lever 6. 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 of unlocking the roller 3 is performed by a one-touch operation of merely pushing down the tiltable shelf a strongly. The force to push down the tiltable shelf a acts as a force to push down the lock portion 6b of the lock lever 6 by the roller 3 through the stay 5. As shown in FIG. 2, when a pressing force (downward rotational force) larger than the upward rotational force (locking strength) of (the lock portion 6b of) the lock lever 6 provided by the spring 9 is applied to the roller 3, The roller 3 gradually pushes down the lock portion 6b of the lock lever 6 and moves to the left in FIG. 2, finally overcoming the end 6c of the inclined cam portion 6a to release the lock, and then the roller 3 gently moves inside the guide groove 4. Is returned to the starting end direction, and the tiltable shelf a is restored to the horizontal position.

[0014]

【Example】

 Next, an embodiment of the present invention shown in FIGS. 1 to 4 will be described. FIG. 1 shows a lock stay of the present invention applied to a tiltable shelf a of a flip-up dolly, FIG. 2 shows a lock 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.

As is apparent from FIG. 4, the main frame 1 is made of an elongated steel plate material having a channel steel shape, and an elongated linear guide groove 4 is formed in a parallel width in the longitudinal direction at the center of the web. . As shown in FIG. 4, a clamp 14 is fixed to the main frame 1 by welding to a flange portion of the main frame. The main frame 1 is attached to the stationary frame b of the bogie by the clamp 14 and is fixed in the same direction as the stationary frame b by tightening a set screw 13.

The stay 5 is also made of an elongated steel plate material, and one end thereof is rotatably connected to the clamp 2 by a hinge shaft 16. The clamp 2 is attached to a frame member c of a tiltable shelf a and is fixed by tightening a set screw 13. A roller 3 is attached to the other end of the stage 5, and the roller 3 is movably connected to the guide groove 4 of the main frame 1. The form 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 vehicle has a diameter sufficiently larger than the groove width of the groove 4. The roller 3 is mounted so that it cannot be removed from the wheel by fitting the annular groove portions to the upper and lower frame edges of the guide groove 4. The roller 3 is mounted in the guide groove 4 through a circular arc portion 4a formed in a series with a size (inner diameter) that allows the roller to be taken in and out from the starting end portion of the guide groove 4.

In the main frame 1, there are an end portion of the guide groove 4, an inclined cam portion 6a that extends into the guide groove 4 and linearly and gradually narrows the groove width, and an end portion 6c of the inclined cam portion 6a. A plate-shaped lock lever 6 having a lock portion 6b formed as a series of semi-circular (but oval-shaped or other different shape as long as it is effective for locking or unlocking the roller 3) is The inclined cam portion 6a is freely pivoted in and out in the groove width direction of the guide groove 4, and its central portion is attached by a support shaft 7. The lock lever 6 has a crank shape bent into a substantially U shape, and one end of a pulling spring 9 is connected to one input end 6d of the crank lever, so that the inclined cam corresponding to the other end of the lock lever 6 is provided. Rotational force is constantly applied in the direction in which the portion 6a extends into the groove of the guide groove 4. The size of the inclined cam portion 6a protruding into the groove of the guide groove 4 is 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 properly specified. The other end of the spring 9 is fixed to the main frame 1 via an adjusting mechanism 10. In the adjusting mechanism 10, 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 projected, and the screw shaft 10b is fixed by lock nuts 10c screwed into both sides of the spring receiver 10a. In addition, 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 that has moved to the right in FIG. 2 in the guide groove 4 pushes away the inclined cam portion 6a and advances, and as soon as it passes through the end 6c thereof, it falls into the lock portion 6b, and the roller 3 is guided by the guide groove 4. The fixed state is locked between the terminal end 4b and the lock portion 6b to be in the locked state. 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 present 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 also for returning the shelf to the original posture. The operation of unlocking is also easy and convenient because it is a one-touch operation that only pushes down the shelf strongly, and it can be surely done. Moreover, 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, and it is excellent in productivity and inexpensive.

[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 indoor groove 5 stay 6a tilting cam part 6b lock part 6 lock lever 7 pin shaft 9 spring 8 positioning means 4a arc part

Claims (2)

[Scope of utility model registration request] 1. A swelling motion is accompanied by tilting of a freely tiltable shelf,
In a lock stay that can hold the shelf at the tilt limit position or return to the original position, a slender plate-shaped main frame that is attached to the stationary frame and fixed in the same direction as the stationary frame, and one end can be tilted A combination of a rod-shaped stay rotatably connected to the frame member of the shelf, and a roller provided at the other end movably in the guide groove of the main frame and non-derailable connected, A linear guide groove is formed in the longitudinal direction of the main frame, and at the end portion of the guide groove, at the end of the inclined cam portion and the end of the inclined cam portion that protrudes into the guide groove and gradually narrows the groove width. A plate-like lock lever having a lock portion formed as a recess is rotatably attached to and removed from the guide groove in the groove width direction by a support shaft, and the lock lever causes a spring to move the inclined cam portion into the groove. Rotational force in the direction of peeping Receiving and are, respectively, characterized in that the positioning means inclined cam portion of the lock lever defines a limit position out except into the groove is provided, the locking stays for tiltably shelf support. 2. A tiltable shelf support characterized in that a circular arc portion having a size capable of inserting and removing a roller of a stay is formed in series at the starting end portion of the guide groove of the main frame according to claim 1. Lock stay for.