JP3478863B2 - Sheet-like member holding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-shaped member gripping device for gripping a sheet-shaped member such as an unvulcanized rubber sheet, and more specifically, reliability in handling folded sheet-shaped members. The present invention relates to a sheet-shaped member gripping device for improving the above.

[0002]

2. Description of the Related Art An apparatus for gripping a sheet-shaped member such as an unvulcanized rubber sheet or the like stacked on a pallet when feeding it to a conveyor or the like is disclosed in, for example, Japanese Patent Laid-Open No. 63-63. Japanese Patent No. 90635 and Japanese Patent Laid-Open No. 5-247
The gripping device described in Japanese Patent No. 27 is known.

The former gripping device has a pair of substantially L-shaped arms having a claw at the tip thereof, and the arms are swung so that the claws come close to each other so that the claws bite into the sheet material. The sheet material is sandwiched and held. However, this gripping device may fail to grip the folded sheet material when the sheet material is in close contact with the gripping device. Therefore, it is necessary to perform a handling operation in advance so that the operator can easily grasp the leading edge of the sheet material. There was a problem.

Further, the latter gripping device has a pair of gripping members which are rotatably supported by a supporting member in parallel with each other and have sharp claws, and the claws of the gripping members are pressed against the sheet-like member. In this state, the gripping member is rotated so that the claws are separated from each other, and the tip of the claw is directed outward while applying the outward tension to the sheet-shaped member so that the claw is bitten into the sheet-shaped member. There is.

However, since the gripping device grips the uppermost sheet-like member (tip sheet portion) with the claws, the gripping force is increased when the folded sheet material is in close contact. In the case of a weak sheet-shaped member such as an unvulcanized rubber sheet, there is a problem that the gripping portion of the sheet-shaped member may be damaged and may not be gripped. Further, if the tip of the sheet-shaped member is displaced toward the center side and the stacking shape is inappropriate, it is difficult to let the nail bite while applying tension to the top-most tip sheet portion, and the sheet-shaped member is gripped. I had a problem if I couldn't. Therefore, similarly to the former gripping device described above, it is necessary to perform a handling operation in which a worker prepares the front end of the sheet material in advance so that it can be easily gripped.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet-shaped member gripping device capable of securely gripping a sheet-shaped member without being influenced by the contact state of the sheet-shaped member and the position of its leading end. To provide. Another object of the present invention is to provide a sheet-shaped member gripping device which can be completely unmanned without requiring a handling work by an operator.

[0007]

According to the present invention to achieve the above object, a pair of gripping means for gripping a sheet-like member are provided on a supporting means so as to face each other, and the gripping means approach and separate from each other in the vertical direction. And a grip portion of a rotatable sheet-shaped member disposed at the lower end of the swivel portion, and the grip portion bites into the sheet-shaped member on the outer periphery thereof. Each of the pair of gripping means pivots its swivel part to bring the gripping parts closer to each other while the plurality of possible claws are provided so as to project in a plurality of rows along the circumferential direction. It is characterized in that the claws of the gripping parts are rotated in mutually opposite directions so that the claws of the gripping parts bite into the sheet-like members below the gripping parts to grip the sheet-like members.

[0008]

The present invention is configured as described above, and the gripping portions of the pair of gripping means are provided at their outer periphery with a plurality of claws projectingly arranged in a plurality of rows along the circumferential direction so as to be able to bite into the sheet-shaped member. Since each of them is provided with the swivel part, the swivel parts swivel to bring the gripping parts closer to each other, while the claws arranged in the innermost row are sequentially bitten into the claws arranged in a plurality of rows, so that the sheet-shaped members are separated on both sides. It can be surely gripped by being sandwiched from the inside. Even if the innermost claw cannot hold the sheet-shaped member in a good condition because the sheet-shaped members are in close contact with each other and are difficult to separate, the claws in the subsequent rows are bitten into the sheet-shaped member to grip the sheet-shaped member. It can be done reliably.

Further, even if the tip of the sheet-like member is displaced and the stacking shape is inappropriate, it is not necessary to bite the nail while applying tension. It is possible to reliably hold the member.
Therefore, since the sheet-shaped member can be reliably gripped, it is possible to eliminate the need for the operator's handling work and to completely unmanner the device.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a front view showing an example of the sheet-shaped member gripping device of the present invention, and FIG. 2 is a side view in which a part of the claw portions of FIG. 1 is omitted. The gripping device 1 hangs down on a support frame (not shown). The support means 3 is provided via the lifted and lowered means 2.
A pair of gripping means 4 for gripping a sheet-shaped member such as an unvulcanized rubber sheet is provided on the supporting means 3 so as to face each other.

As shown in FIG. 2, the supporting means 3 has a flat plate-shaped supporting plate portion 5 arranged in the horizontal direction, and two opposite pairs of supporting members are provided on both ends of the supporting plate portion 5. The parts 6, 6, 6, 6 are respectively suspended. A mounting member 7 is fixed to the central portion of the upper surface of the support plate portion 5, and the lower end of the rod 2a of the elevating means 2 composed of a fluid pressure cylinder or the like is connected to the mounting member 7. Therefore, the support means 3
When the rod 2a expands and contracts due to the operation of the elevating means 2,
It is configured to move up and down.

A pair of gripping means 4 and 4 suspended from the supporting means 3 are horizontally installed between the supporting portions of the supporting means 3 in parallel with each other in the horizontal direction, and end portions are fixed to the supporting portions. The fixed shaft 9 is provided with swivel parts 10 which can swivel in directions approaching and separating from each other in the vertical direction, and the lower end parts of the swivel parts 10 are swung in mutually opposite directions to form a sheet shape. The structure is such that each has a gripping portion 11 for gripping a member.

The swivel portion 10 and the grip portion 11 of the pair of grip means 4 and 4 arranged so as to face each other are arranged symmetrically. Therefore, one gripping means 4 will be described below, and the other constituents of the other gripping means 4 will be designated by the same reference numerals and description thereof will be omitted. The swivel part 10 of the grip means 4 is a pair of swivel plates 12 formed in a flat plate shape.
a, 12b, and the pair of swiveling plates 12a, 1
2b are attached to the fixed shaft 9 at a predetermined interval. The swivel plates 12a and 12b are arranged along the vertical direction, and the intermediate portion thereof is attached to the fixed shaft 9,
It is possible to turn around.

Gears 13a and 13b are fixed to the fixed shaft 9 outside the swivel plates 12a and 12b, and gears 13a and 13b are respectively provided outside the swivel plates 12a and 12b below the fixed shaft 9. A transmission mechanism 14a that meshes
14b is provided. This transmission mechanism 14a, 14b
Is equipped with intermediate shafts 15a and 15b that are rotatably projected in parallel with the fixed shaft 9 on the outer surfaces of the swivel plates 12a and 12b.
The swivel plates 12a, 12 of the intermediate shafts 15a, 15b
Gears 16a and 16b that mesh with the gears 13a and 13b are fixedly provided on the inner side of the b side. Intermediate shaft 15a, 1
Sprockets 17a and 17b having a larger diameter than the gears 16a and 16b are fixedly provided on the outer side of 5b.

The grip portion 11 is composed of swivel plates 12a, 12
It has a columnar gripping roller 18 disposed between b, and support shafts 19a and 19b project from both ends of the gripping roller 18, and the gripping roller 18 and the support shafts 19a and 19b are parallel to the fixed shaft 9. The support shafts 19a and 19b
The intermediate portion of is pivotally supported by the lower ends of the swiveling plates 12a and 12b.

The gripping roller 18 has a substantially L-shape that is capable of biting into a sheet-like member provided on the outer periphery of the gripping roller 18 so as to project at a predetermined interval along the width direction of the gripping roller 18 (the direction in which the support shafts 19a and 19b extend). Formed plural nails 20, 20, ...
Is provided with a plurality of claw portions 21 arranged along the circumferential direction. Support shafts 19a on the outside of the swivel plates 12a, 12b,
Sprockets 22a and 22b having a smaller diameter than the sprockets 17a and 17b forming the transmission mechanisms 14a and 14b are fixed to both ends of the sprockets 17a and 1b.
Endless chains Ca and Cb are wound around 7b and the sprockets 22a and 22b, respectively.

Further, above the fixed shaft 9 of the swivel plates 12a, 12b, the upper end portions thereof project above the support plate portion 5 via the notch portions 8a, 8b formed through the support plate portion 5. The upper end of the connecting shaft 23 is connected horizontally. A rear end of driving means 25 such as a fluid pressure cylinder is pivotally connected to a mounting plate 24 protruding from the upper surface of the support plate portion 5, and the driving means 25 is provided so as to be vertically swingable around the rear end. Has been. The drive means 25 is configured to connect the tip of the expanding and contracting drive rod 26 to the connecting shaft 23.

Therefore, the drive rod 26 of the drive means 25 extends so that the swivel plates 12a and 12b are moved to the arrow A in FIG.
When turning in the direction (the direction in which the grips at the lower ends of the turning portions approach each other in the inward direction), the gears 13a and 13b move on the gear 1
6a and 16b roll, rotation in the same direction as the turning direction is imparted to the gears 16a and 16b, and the sprockets 17a and 1b are rotated.
Sprocket 22 via 7b and chains Ca, Cb
The a and 22b rotate in the same direction as the gears 16a and 16b, and the gripping roller 18 of the gripping portion 11 rotates in the arrow A direction which is the same as the turning direction.

Next, the operation of the sheet-shaped member gripping device 1 of the present invention having the above-mentioned structure will be described. First, the elevating means 2 is operated to lower the supporting means 3, and the innermost claws 20 provided on the gripping rollers 18 of the pair of gripping means,
As shown in FIG. 3 (a), the sharp tip of 20 ...
The top end sheet portion of the sheet-like member S, which is folded and placed on the pallet P below the grip portion 11, is brought into contact with the top end sheet portion.

Next, as shown in FIG. 3 (b), the driving means 25 is driven, the driving rod 26 is extended, and the swivel unit 1 is moved.
The zero swiveling plates 12a and 12b swivel in the direction of arrow A with the fixed shaft 9 as a fulcrum. The gear 16 of the transmission mechanism 14a, 14b is mounted on the gear 13a, 13b fixed to the fixed shaft 9.
a and 16b roll inward, and the gears 16a and 16b are given rotation in the direction of arrow A, which is the same as the turning direction.

The sprockets 17a, 17b rotate in the same direction as the gears 16a, 16b via the intermediate shafts 15a, 15b, and the sprockets 22a, 22b rotate in the turning direction via the chains Ca, Cb engaging with the sprockets 17a, 17b. It rotates in the same arrow A direction as. Sprocket 2
Rotation of the support shafts 19a and 19b to which 2a and 22b are fixed causes the gripping roller 18 of the gripping portion 11 to rotate in the same direction as the turning direction (rotate in opposite directions), and the gripping roller 18
.. on the lower side of the claws 20, 20 ... Are moved inward with their sharpened tips facing inward, and as shown in FIG. The arranged claws 20, 20 ... sequentially bite into the leading end sheet portion, and the seat portion is lifted so that the claws 20, 20 ... Penetrate to the back side of the leading end sheet portion and grip the leading end sheet portion. To do.

Since a plurality of claws 20, 20, ... Are provided so as to project in a plurality of rows along the circumferential direction on the outer periphery of the gripping roller 18 of the gripping portion 11, the folded sheet-like member S is closely attached and separated. It is difficult, and even if the tip sheet portion cannot be properly grasped by the innermost (frontmost) claws 20, 20, ..., the claws 20, 20 ... In the subsequent row are used as the tip sheet portion of the sheet-like member S. It is possible to bite it and hold it securely.

Further, even if the tip of the leading end sheet portion is displaced toward the center side and the stacking shape is inappropriate, it is not necessary to bite the nail while applying tension, so that one row of gripping portions 11 has a plurality of rows. The nails 20, 20, ... Are sequentially bitten into the tip sheet portion, and the sheet-shaped member S can be reliably gripped.
Therefore, the sheet-shaped member gripping device of the present invention is not affected by the contact state of the sheet-shaped member S or the position of the leading end thereof.
The sheet-shaped member S can be reliably gripped. Also,
Since the sheet-shaped member S can be reliably gripped, it is possible to make the apparatus completely unmanned without requiring a handling work by an operator.

Sheet-like member S gripped by the gripping device
When releasing, the operation reverse to the above may be performed. That is, the drive rod 26 of the drive means 25 is operated in a contracting direction, and the swing plates 12a and 12b of the swing portions 10 of the pair of gripping means are swung in the direction of arrow B. The gripping rollers 18 of the gripping portion 11 rotate in the same direction as the turning direction via the gears 13a and 13b and the transmission mechanisms 14a and 14b, and the claws 20 arranged in a plurality of rows as the turning portion 10 turns outward. , 20 ... Move in the outward direction opposite to the biting direction, and the sheet-like member S can be released.

According to the present invention, in the above-described embodiment, the grip portion 1
In order to drive the gripping roller 18 of No. 1, the driving means 25 for driving the turning portion 10 to rotate is performed via the gears 13a and 13b and the transmission mechanisms 14a and 14b. Used only for the gripping roller 1
8 may be configured to operate in synchronism with the turning operation of the turning unit 10 by another electric motor provided on the turning plates 12a and 12b or a driving means such as a fluid pressure cylinder. It is needless to say that the present invention can be implemented in other modes as well without being limited to the modes.

[0026]

As described above, in the sheet-shaped member gripping device of the present invention, a pair of gripping means for gripping the sheet-shaped member are provided on the supporting means so as to face each other, and the gripping means approach each other in the vertical direction. It has a swivel part that can swivel in the direction of separation, and a swivel sheet-shaped member gripping part that is disposed at the lower end of the swivel part. Each of the pair of gripping means is provided with a plurality of pawls that can bite into each other so as to project in a plurality of rows along the circumferential direction. Since the claws of the gripping portion bite into the sheet-shaped member below the gripping portion and are gripped so as to sandwich the sheet-shaped member, the contact state of the sheet-shaped member and its Left at the tip position Without being, a sheet-like member can be reliably gripped. Further, since the sheet-shaped member can be reliably gripped, it is possible to completely unmanner the device without requiring the handling work of the operator, and to securely grip the sheet-shaped member in the next step. Since it can be supplied, the productivity of products using the sheet-shaped member can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a sheet-shaped member gripping device of the present invention.

FIG. 2 is a side view of FIG.

3A and 3B are explanatory views showing the operation of the sheet-shaped member gripping device of the present invention, in which FIG. It is a principal part front view which shows the state which hold | gripped the circular member.

[Explanation of symbols]

1 sheet-shaped member gripping device 3 supporting means 4 gripping means 9 fixed shaft 10 turning part 11 gripping parts 13a, 13b gears 14a, 14b
Transmission mechanism 18 Gripping rollers 19a, 19b
Support shaft 20 Claw 21 Claw 25 Drive means 26 Drive rod S Sheet-like member

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirofumi Imamura 2-1, Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. Hiratsuka Plant (56) Reference JP-A-1-231732 (JP, A) JP-A-3 -192034 (JP, A) JP-A-3-272933 (JP, A) JP-A-56-108637 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65H 20/16 B65H 5/08

Claims (7)

(57) [Claims] 1. A pair of gripping means for gripping a sheet-like member are provided on a supporting means so as to face each other, and the gripping means include swivel parts which can swivel in a direction toward and away from each other in a vertical direction, and this swivel part. And a gripping portion of a rotatable sheet-shaped member disposed at the lower end of the gripping portion. The gripping portion has a plurality of claws that can bite into the sheet-shaped member in a plurality of rows along the circumferential direction. Each of the pair of gripping means pivots its swivel portion to bring the gripping portions closer to each other, while rotating the gripping portions in mutually opposite directions, the claw portions of the gripping portions are provided. The sheet-shaped member gripping device configured to bite into the sheet-shaped member below the gripping portion and grip the sheet-shaped member so as to sandwich the sheet-shaped member. 2. The gripping means has fixed shafts which are horizontally provided in the support means in parallel with each other in a horizontal direction, and the swinging portion is swingably provided on the fixed shaft and fixed to the fixed shaft. The gripping part is rotated by a transmission mechanism provided on the swiveling part, with respect to an installed gear.
The sheet-shaped member gripping device according to. 3. The sheet-shaped member grip according to claim 3, wherein each of the gripping means has a driving means attached to the supporting means, and each driving rod of the driving means is connected to an upper end portion of the revolving portion. apparatus. 4. The sheet-shaped member gripping device according to claim 3, wherein the driving means is a fluid pressure cylinder. 5. The sheet-shaped member gripping device according to claim 1, wherein the gripping portion has a rotatable gripping roller, and the claw portion is provided on the outer periphery of the gripping roller. 6. The sheet-shaped member gripping device according to claim 5, wherein the claw of the claw portion is formed in a substantially L shape. 7. The apparatus according to claim 1, wherein the supporting means can be moved up and down.
The sheet-shaped member gripping device according to.