JPS5854323Y2 - Elevator mechanism of packaging equipment - Google Patents

Description

[Detailed description of the invention] The present invention is an improvement of the elevator mechanism of a packaging device, more specifically, the elevator mechanism of a packaging device that moves up and down by placing and receiving a packaged product under a packaging film fed out under a clamp mechanism that moves to open and close. In particular, this invention relates to the improvement of the elevator mechanism disclosed in Japanese Patent Application Laid-Open No. 52106997.

The above-mentioned conventional mechanism has a structure in which one swinging leg is erected on each side of a fixed support leg so as to be able to freely fall inward, and the packaged items within the distance between the two swinging legs are placed. When receiving the package, it is meaningful because it can reliably support the packaged item regardless of its size within that range.

However, if the packaged item is larger, stable support for the packaged item cannot be obtained unless the distance between the support leg and each swinging leg is set large; If the interval is set too large, it will not be possible to place and receive small-sized items to be packaged, which were possible with conventional mechanisms.

However, in order to narrow the distance between the supporting legs and the swinging legs, it is conceivable to set the spacing between the swinging legs wide and to erect two fixed support legs between the swinging legs, but this is not possible due to the structure. In this case, the elevator must start descending when the amount of movement of the clamp that plunges under the packaged product is small compared to the bottom area of the packaged product, and the subsequent stable closing movement of the clamp and sufficient amount of wrapping paper are required. There is a problem with not being able to obtain tension.

In view of these circumstances, the present invention provides an elevator mechanism that can raise packages ranging from large to small packages in a more stable manner than conventional mechanisms, and also ensures the clamping operation of the clamp mechanism. The mechanism of the present invention has fixed supporting legs 3 and movable swinging legs 4 erected at intervals on a plywood board that moves up and down. Both legs 3, 4 on the outside of legs 3, 4
The swinging legs 5 and 6 are respectively erected so as to be able to fall inward at substantially equal intervals, and the swinging legs 6 are caused to fall down before the swinging leg 4 by the clamp of the clamp mechanism. It is characterized by the following.

An embodiment of the present invention will be explained with reference to the drawings in the case of so-called stretch film packaging that uses a packaging film with ductility. A supply conveyor for transporting the hot knives onto the elevator mechanism A, b is a pair of clamping mechanisms each having a hot knife b' and a blade holder b'' slidably thereon, and C is a conveyor immediately below the clamping mechanism. A stretch film is arranged horizontally, and both ends are fed out from film rolls (not shown).

The elevator mechanism A is set so that its upper end becomes the transfer surface of the conveyor a and the road surface at the lower limit position, and the clamping mechanism at the upper limit position becomes the upper surface and the road surface b, so that the elevator mechanism A moves up and down between the upper and lower limits. do.

Such an elevator mechanism A has a base plate 2 fixed to the upper end of a support rod 1 that is connected to a drive mechanism (not shown) and moves up and down, and the base plate 2 moves up and down together with the support rod 1. A supporting leg 3 and three rows of swinging legs 4, 5.6 are respectively installed in an upright manner on a plate 2.

The support legs 3 and swing legs 4, 5.6 are arranged in parallel on the base plate 2 at approximately equal intervals, with the support legs 3 in the second row from the conveyor a side, and the swing legs 4 in the third row. Eyes and swing legs 5.6 are placed at each end of the left and right sides, respectively.

The support leg 3 consists of a one-shaped frame with an upper piece 3' interposed on the upper end of leg parts 3', 3' fixedly provided at the front and rear ends of the base plate 2, and the leg parts 3', 3' is fixedly fixed on the base plate 2 in an upright manner.

The swinging legs 4 and 6 are front and rear leg portions 4', 4' and 6', respectively.

Bearings 7, 7 and 8, each having upper pieces 4' and 6'' mounted on the upper end of the bearing 6', and having respective legs 4', 4' and 6', 6' disposed on the base plate 2; 8 with shafts 7' and 8' respectively.
This allows it to be mounted so that it can swing freely.

The swinging legs 5 consist of three pieces arranged in series at appropriate intervals,
Each swing leg 5 is swingably mounted between bearings 9 on the base plate 2 with a shaft 9'.

Spring 10.10 is suspended from the shafts 7', 8', 9' on the swinging legs 4, 5.6, respectively, so that the swinging legs 4, 5.6 are connected to each other. Each bearing 7, 8.9 is urged to rotate outwardly, that is, in a direction away from the fixed support leg 3, and each of the bearings 7, 8.
．． Stoppers 7//, 8//, 8 for stopping 6 in an upright position
// is provided.

Therefore, each swinging leg 4, 5.6 is held upright by the elasticity of the spring 10 and the stoppers 7//, 9//, 8//, and is attached so that it can freely fall only toward the supporting leg 3 side. .

Upper piece 3'' of support leg 3, upper piece 4'' of swinging legs 4, 6.

The upper surfaces of the swing legs 6'' and the swing legs 5 are set flush with each other, and the upper pieces 4'' and 6'' have an overhanging shape (FIG. 2) in order to increase their mounting area.

Therefore, the above elevator mechanism A has the base plate 2 at its lower limit position.
The upper support leg 3 and swing legs 4, 5.6 are connected to the supply conveyor a
During this stop, the product A is transferred and placed on each of the legs 3.4 and 5.6 by the conveyor A, and then the elevator mechanism A is activated to support the product A. The base plate 2 rises together with the rod 1, and while pushing up the stretch film C directly above with the product A, the film C is clamped with an appropriate tension applied, moves upward between B and stops at the upper limit position.

(Figure 1). After that, the clamp mechanism begins to close,
The clamping mechanism on the swinging leg 5 side goes under the bottom of the product, and when both clamping mechanisms (b) approach the swinging legs 4 and 5, the support rod 1 begins to descend, and the support leg 3 and the swinging leg 4 , 5.6 falls.

(Figure 4). When the clamp mechanisms 1 and 2 are closed, as the closing movement progresses, the mechanism pushes and moves the swing legs 6, 4 and 5 to sequentially fall down against the elasticity of the spring 10, so that the mechanism moves along the bottom surface of the product. As the film C is folded in, the iron leg 3 is clamped by lowering the supporting leg 3. When the film C is pulled out from b, the clamping mechanism is triggered at the leg 3 position. Film C is fused and bonded using (FIG. 5).

When the elevator mechanism A descends, each swing leg 4, 5.6 automatically returns to the upright position due to the elasticity of the spring 10 when it is disengaged from the clamp mechanism.

In this embodiment, the number of swinging legs 5 is increased to three, or the upper surfaces of the swinging legs 4 and 6 are enlarged, so that the product can be placed on a large area as a whole. 3, 4, and 5.6 in a stable state, which further enhances the effects of the present invention.

As described above, the present invention involves installing fixed support legs and swinging legs that can be freely folded at intervals on a plywood board that moves up and down, and swinging them at intervals on the outside of each of the legs. Since the movable legs are raised so as to be freely foldable inward, there is no problem with the film folding operation by the clamp mechanism, and the elevator mechanism can be smoothly removed and removed during the clamp operation.

In addition, since the legs on which the packaged items are placed and received are made up of four legs (rows), compared to the conventional structure in which the packaged items are supported by three legs, even if the leg spacing is the same as the conventional structure, it is possible to reduce the size of the packaged items from large to small. It is possible to reliably and stably support and raise the two swinging legs, and since the outer legs on the two swinging legs are clamped down before the swinging legs on the other side, the two swinging legs can be fixed. Compared to a structure in which legs are provided, the amount of clamp movement when the elevator is lowered during clamp operation can be increased, and therefore the wrapping paper can be sufficiently tensioned by the clamp, and the closing movement of the clamp can be stabilized after the elevator lowers. .

In addition, since one of the legs is a fixed support leg that does not wobble, the distance from the plywood to the packaged product, in other words, the level of the packaged product when clamping, can be maintained constant, making it possible to maintain a constant level of the packaged product during clamping. Stability may be further aided.

Therefore, the desired purpose can be achieved.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the packaging device of the present invention, Fig. 2 is a plan view of the elevator mechanism, and Figs. 3 to 5 are partially cutaway front views of the packaging device illustrating the operating steps of the elevator mechanism. It is a diagram. In the figure, A is an elevator mechanism, 1 is a support rod, 2 is a base plate, 3 is a support leg, 4, 5.6 are swing legs, b is a clamp mechanism, and C is a film.

Claims (1)

[Scope of utility model registration request] In the elevator mechanism of the packaging device, which moves up and down with the packaged items placed and received under the packaging film fed out under the clamp mechanism that moves to open and close, a fixed support leg 3 and a swinging swing that can be freely moved are placed on the plywood that moves up and down. The movable legs 4 are erected at intervals, and the swing legs 5 and 6 are freely foldable inwardly at substantially equal intervals between the two legs 3 and 4 on the outside of each of the legs 3 and 4. An elevator mechanism in which the swinging leg 6 is raised up, and the swinging leg 6 is caused to fall down before the swinging leg 4 by a clamp of a clamp mechanism.