JPH0729057Y2 - Clamp type article carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of use" The present invention relates to a clamp type article conveying device provided with a pair of clamp members for gripping an article, and more specifically to a rotary body for an article gripped by the clamp member. The present invention relates to a clamp type article conveying device which is rotatably transferred with rotation.

"Prior Art" Conventional clamp-type article conveying apparatuses of this type usually include a rotating body rotatably provided on a frame, a cam member provided on the frame, and a pair of rotating shafts pivotally supported on the rotating body. When,
A pair of clamp members provided on each rotary shaft and opened / closed by its rotation operation, and a cam follower provided on a swing lever interlocking with the rotary shaft and engaged with the cam member to open / close the clamp member. It has and.

[Problems to be Solved by the Invention] However, in the clamp type article conveying apparatus having the above-described configuration, since the opening / closing operation of the pair of clamp members is an arc motion centering on the rotation center of each rotation shaft, the clamp members are gripped by the clamp members. When the size of the article is changed, the center of the article is displaced in the radial direction of the rotating body.

When the center of the article gripped by the clamp member fluctuates in the radial direction depending on its size, for example, when the container gripped by the clamp member is delivered to the downstream filling machine, the delivery position is displaced in the radial direction. As a result, the container cannot be carried into the position directly below the filling nozzle and the smooth filling operation is hindered.

"Means for Solving the Problems" In view of such circumstances, the present invention is the above-mentioned clamp type article conveying apparatus, that is, a rotating body rotatably provided on a frame, and a first cam member provided on the frame. ,
The pair of rotary shafts pivotally supported by the rotary body, the pair of clamp members provided on each rotary shaft and opened and closed by the rotary motion thereof, and the swing lever interlocked with the rotary shafts, In a clamp-type article conveying device provided with a first cam follower that engages with a cam member to open and close the clamp member, the facing surfaces of the pair of clamp members are formed in V shapes, and the V-shaped portions have a circular cross section. Of the container, the pair of clamp members are provided so as to be able to move forward and backward in the radial direction of the rotating body, the second cam member is provided on the rotating body, and the second cam follower interlocked with the clamp member is provided. Is engaged with the second cam member, and the clamp member can be displaced in the radial direction by the second cam follower and the second cam member according to the opening / closing operation position of the clamp member. Further, the center of the container when gripping a small-diameter circular container with a V-shaped portion of the pair of clamp members and the center of the container when gripping a large-diameter circular container is substantially The cam curve of the second cam member is set so as to be at the same position.

[Operation] According to the above configuration, even if the opening / closing operation position of the clamp member when gripping an article differs depending on the size of the article, the second cam follower and the second cam member open / close the clamp member. Since the clamp member can be displaced in the radial direction according to the operating position, the article can always be positioned at a predetermined radial position of the rotating body regardless of the size of the article.

Therefore, when the container gripped by the clamp member is delivered to the filling machine on the downstream side, the delivery position can always be set to a fixed position regardless of the size of the container. Therefore, even if the size of the container is changed. A smooth filling operation can always be performed.

[Embodiment] The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, a container 2 conveyed by a supply conveyor 1 is shown.
Is conveyed by the timing screw 3 in synchronism with the operation of the clamp type article conveying device 4, and at a predetermined grasping position X, the opposing surface is formed in a V shape, and the container 2 having a circular cross section can be grasped by both V-shaped portions. A pair of clamp members
It is gripped by 5a and 5b (see FIG. 3).

The container 2 gripped by the pair of clamp members 5a, 5b is rotatably transferred as the rotary body 6 constituting the clamp type article conveying device 4 rotates, and released from the clamp members 5a, 5b at a predetermined release position Y. Then, the rotary type filling machine 7 is carried into a position directly below a filling nozzle (not shown).

As shown in FIG. 2, the clamp type article conveying device 4 is connected and fixed to a vertical rotating shaft 10 rotatably supported by a frame 8 via a bearing 9 and an intermediate portion of the rotating shaft 10. The rotating body 6 is provided, and the lower end of the rotating shaft 10 is interlocked with a motor (not shown). In addition, the rotating body 6 includes an upper plate 12 and a lower plate which are fixed at the upper and lower positions of the rotary shaft 10.
It is composed of 13 and a connecting column 14 for connecting the both.

The rotating body 6 is provided with a plurality of clamp devices 15 at equidistant positions on the outer periphery thereof (see FIG. 1). As shown in FIGS. 2 and 3, each clamp device 15 includes an upper plate 12 A movable member 17 slidably attached to a slider pin 16 provided in the radial direction, a pair of rotary shafts 18a and 18b rotatably supported by the movable member 17, and a pair of rotary shafts 18a and 18b attached to the lower parts of the rotary shafts so that Gears 19a and 19b meshed with each other, and the above-mentioned clamp members 5a and 5b attached to the upper portions of the respective rotary shafts.

Therefore, by rotating one rotating shaft 18a in the forward and reverse directions by the cam mechanism 20 described later, the gear 19
The pair of clamp members 5a and 5b can be opened and closed via a and 19b, and the movable member 17 is connected to the slider pin.
By sliding along 16
The a and 5b can be displaced forward and backward in the radial direction of the rotating body 6.

On the lower plate 13 of the rotary body 6, a rotary shaft 21 is rotatably supported on substantially the same axis of one rotary shaft 18a, and the lower rotary shaft 21 and the upper rotary shaft 18a are universal. By connecting via the joint mechanism 22, the upper rotary shaft 18a can be allowed to move in the radial direction of the rotary body 6 together with the movable member 17 with respect to the lower rotary shaft 21.

One end of a swing lever 23 is attached to the lower end portion of the lower rotary shaft 21, and the first cam follower 24 constituting the above-described cam mechanism 20 is attached to the other end of the swing lever 23. A return spring 25 provided between the rotary shaft 21 and the lower plate 13 urges the rotary shaft 21 to rotate in one direction, whereby the first cam follower 24 of the first cam member 26 provided on the frame 8 is rotated. It is engaged with the outer peripheral cam surface.

The cam surface of the first cam member 26 comprises a large-diameter circular arc portion 26a and a small-diameter circular arc portion 26b. The large-diameter circular arc portion 26a displaces the first cam follower 24 radially outward. The clamp members 5a and 5b are closed, and the small-diameter arc-shaped portion 26
In b, the first cam follower 24 is displaced inward in the radial direction by the return spring 25, and the clamp member 5a,
I am trying to open 5b.

Next, the lower rotary shaft 21 is divided into two members, that is, a first rotary shaft 27 and a second rotary shaft 28, and these rotary shafts 27 and 28 are arranged on the same axis line to form a lower part. Each plate 13 is rotatably attached, and a connecting pin 29 is rotatably connected to the rotary shafts 27, 28, which is interposed between the rotary shafts 27, 28 on the same axis.

The upper end of a coil-shaped buffer spring 30 wound around the connecting pin 29 is attached to the first rotating shaft 27, and the lower end of the buffer spring 30 is attached to the second rotating shaft 28. Due to the twisting force, the upper first rotary shaft 27, and thus the clamp member 5a, with respect to the lower second rotary shaft 28, is used as the container 2
Is urged to rotate in the direction of gripping.

Further, a tubular portion 31 that covers the buffer spring 30 is provided below the first rotary shaft 27, and a tubular portion 32 that covers the buffer spring 30 is provided above the second rotary shaft 28, and each tubular Shape 3
Comb-shaped concave and convex engaging portions 33 and 34 are formed on the lower end surface and the upper end surface of the first and the 32, which face each other. Then, the convex portion of the one engaging portion 33 is fitted into the concave portion of the other engaging portion 34 with a predetermined gap in the circumferential direction, and the torsional force of the buffer spring 30 causes the first rotating shaft 27 and the first rotating shaft 27 to move together. As shown in FIG. 4, normally, the convex portion of one engaging portion 33 is elastically contacted with the wall surface of the concave portion of the other engaging portion 34 by urging the rotating shaft 28 in the opposite direction. Kept in the initial state.

Therefore, when the second rotary shaft 28 is rotationally driven by the first cam member 26 in the direction to close the clamp member 5a,
The first rotary shaft 27, the universal joint mechanism 22, the upper rotary shaft 18a, and the clamp member 5a are integrally rotated while maintaining the above-described initial state. And
When the second rotating shaft 28 is driven to rotate further in the direction to close the clamp member 5a while the clamp member 5a grips the container 2 and the rotation thereof is stopped, the engaging portions 33 and 34 are separated from each other. By further twisting the buffer spring 30 from the twist in the initial state, the continuous rotation of the second rotating shaft 28 is allowed.

On the other hand, from that state, the second rotating shaft 28 is clamped by the clamp member.
Even when the clamp member 5a is adhered to the container 2 and is not separated from the container 2 for some reason when it is driven to rotate in the opening direction of the 5a, both the engaging portions are brought into the initial state described above. Since 33 and 34 are engaged with each other to mechanically connect both rotary shafts 27 and 28, the clamp member 5a can be forcibly separated from the container 2 by the elastic force of the return spring 25.

At least one of the rotary shafts 27, 28 is formed with a plurality of holes around the connecting pin 29 into which the ends of the buffer springs 30 are fitted. Buffer spring in the initial state by selectively fitting in the hole
The biasing force of 30 can be adjusted.

However, as shown in FIGS. 2 and 3, a second cam member 35 is attached to the outer peripheral surface of the upper plate 12, and the slider pin 16 described above is attached to the outer peripheral surface of the upper plate 12 and the second cam member 35. The movable member 17, which is erected between the second cam member 35 and the outer peripheral surface of the upper plate 12 of the movable plate 17, is movably mounted between the outer peripheral surface of the upper plate 12 and the second cam member 35.

A pair of cam grooves 36a and 36b are formed on the upper surface of the second cam member 35, and the second cam followers 37a and 37b axially supported on the lower surfaces of the clamp members 5a and 5b are engaged with the respective cam grooves 36a and 36b. I am combining. Each cam groove 36a, 36b is formed so as to traverse an imaginary circle centered on the center of rotation of the rotating body, and therefore the pair of rotating shafts 18a, 18b are rotated to open / close the clamp members 5a, 5b. Both clamp members 5a,
5b is displaced in the radial direction along the slider pin 16 according to the cam curves of the cam grooves 36a and 36b.

Then, at this time, the cam curves of the cam grooves 36a and 36b are such that when the container is gripped at an arbitrary opening / closing operation position of both clamp members 5a and 5b, the centers of the gripped containers are all fixed positions Z. Is set to.

According to the above configuration, the small-diameter container 2a that is conveyed from the supply conveyor 1 to the clamp type article conveying device 4 and is grasped by the clamp members 5a and 5b is grasped so that the center thereof is at the above-mentioned fixed position Z. Then, it is delivered to the rotary filling machine 7 on the downstream side as it is.

Similarly, since the large-diameter container 2b is also gripped so that the center of the large-diameter container 2 is at the constant position Z, a constant delivery position, that is, a filling operation, is performed regardless of whether the small-diameter container 2a or the large-diameter container 2b. It can be delivered to the rotary filling machine 7 at a position directly below the nozzle, so that smooth filling work can always be performed even if the size of the container is changed.

Either one of the cam grooves 36a and 36b may be omitted. In addition, in this embodiment, the second clamp member is attached to each of the clamp members 5a and 5b.
Although the cam followers 37a and 37b are provided, a second cam follower is formed on at least one of the rotary shafts 18a and 18b so as to project outward in the radial direction, and the second cam follower is provided on the rotating body 6. You may make it elastically contact with the cam surface of a 2nd cam member with a spring.

FIG. 5 shows another embodiment of the present invention. In this embodiment, the rotary shafts 18a and 18b are directly supported on the upper plate 12 of the rotary body 10, while the upper ends of the rotary shafts 18a and 18b are respectively supported. The engaging portions 38 and 39 in the general direction are formed in the portions, and the long holes 40 provided in the clamp members 5a and 5b are engaged with the engaging portions to form the clamp members 5 respectively.
Only a and 5b are moved forward and backward in the radial direction.

In the present embodiment, each of the clamp members 5a, 5b is biased radially inward by the spring 41, and the movable member 17 in the above embodiment is biased radially inward by a spring (not shown), Obviously, the radially outer portion of each cam groove 36a, 36b can be omitted.

Further, by overlapping a plurality of first cam members 26 having different cam curves and selectively engaging one of the first cam followers 24 with any one of the first cam members 26, the cam of each first cam member is Optimal opening / closing timing can be obtained for each container having a different size by the curve, and therefore more accurate delivery can be performed.

[Advantage of Invention] As described above, according to the present invention, when the container is gripped by the clamp member, the center of the article can be always positioned at the same position regardless of the size of the article. When the container held by the member is delivered to the filling machine on the downstream side, the delivery position can be kept constant regardless of the size of the container. Therefore, even if the size of the container is changed, it is always smooth. The effect that the filling operation can be performed is obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG.
The drawing is a plan view of the essential part of another embodiment of the present invention. 5a, 5b ... Clamping member, 6 ... Rotating body, 8 ... Frame 9 ... Bearing, 10 ... Rotating shaft 15 ... Clamping device, 17 ... Movable member 18a, 18b ... Rotating shaft 22 ... Universal Joint 23 …… Rotating lever, 24 …… First cam follower 26 …… First cam member, 35 …… Second cam member 36a, 36b …… Cam groove 37a, 37b …… Second cam follower 38, 39 …… Abe, 40 ... long hole

Claims (1)

[Scope of utility model registration request] 1. A rotary body rotatably provided on a frame, a first cam member provided on the frame, a pair of rotary shafts pivotally supported on the rotary body, and a rotary operation provided on each rotary shaft. Clamp type provided with a pair of clamp members that are opened and closed by a first cam follower that is provided on a swing lever that interlocks with the rotation shaft and that engages with the first cam member and opens and closes the clamp member. In the article transporting device, the opposing surfaces of the pair of clamp members are formed in a V shape so that both V-shaped portions can hold a container having a circular cross section, and the pair of clamp members are moved forward and backward in the radial direction of the rotating body. The second cam follower interlocked with the clamp member is engaged with the second cam member, and the second cam follower and the second cam portion are provided so as to be possible. The clamp member allows the clamp member to be displaced in the radial direction according to the opening / closing operation position of the clamp member, and further, the center of the container when the small-diameter circular container is grasped by the V-shaped portions of the pair of clamp members. And the cam curve of the second cam member is set so that the center of the large-diameter circular cross-section container and the center of the container are substantially at the same position. .