JP3941228B2 - Roll clamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roll clamp device that is mounted on a forklift and is used for a cargo handling operation of a roll-like article (hereinafter referred to as roll paper) such as newspaper or kraft paper, and in particular, two roll papers having different diameters. The present invention relates to a split-arm type roll clamp device that is effective in handling the machine.
[0002]
[Prior art]
This type of roll clamp device is disclosed in, for example, Japanese Patent Laid-Open No. 6-321499. This clamp device has a pair of openable and closable clamp arms consisting of a swing-type long arm and a fixed short arm, and the swing-type long arm is used to handle the work of simultaneously gripping roll papers of different diameters. Two are arranged side by side in the width direction.
The arms arranged side by side, i.e., both split arms, are individually opened and closed by a hydraulic clamp cylinder to enable gripping of the roll paper with different diameters.
The roll clamp device configured as described above is mounted on the front surface of a lift bracket as a lifting member that is lifted and lowered along the mast of a forklift so as to be rotatable about a horizontal axis via a rotating device. -It is possible to perform a horizontal gripping operation for clamping the roll paper by positioning the arm up and down and a vertical gripping operation for clamping the roll paper by positioning it to the left and right.
[0003]
[Problems to be solved by the invention]
However, according to the conventional roll clamp device described above, as shown in FIG. 6A, after the two roll papers W arranged side by side are clamped, as shown in FIG. In the case of performing an operation such as rotating 90 degrees and lowering it vertically, if there is a gap S between the two roll papers W, when the clamp arm 21 is opened and the clamp is released, the upper roll paper W is released. May suddenly fall on the lower roll paper W by the gap S, and both roll papers W may be damaged. For this reason, there is an inconvenience that the position of the roll paper W must be adjusted so as to close the gap S prior to clamping, or the roll paper W must be clamped one by one. There was a problem that.
[0004]
The present invention has been made in view of the above-described problems. The object of the present invention is to provide a gap between the roll papers when the roll papers are clamped with a horizontal grip and then rotated 90 degrees and placed vertically. Even if it exists, it is providing the roll clamp apparatus which can be installed vertically without damaging roll paper.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is configured as follows. That is, the invention of claim 1 is a roll clamp device that is mounted on the front surface of a lifting member in a forklift so as to be rotatable around a horizontal axis via a rotating device, and is used for a roll paper handling operation ,
Wherein comprising a clamping holder which is rotated by a rotating device and a pair of clamping arms mounted for clamping and releasing the roll paper in the radial direction by the openable and opening and closing the front of the clamp holder,
Each of the clamp arms is composed of two split arms arranged in parallel in a direction orthogonal to the clamp direction for the roll paper ,
Wherein the tips of the two split arms constituting each clamp arm, each clamping pads are slidably supported in parallel direction of the axial and and both split arms support shaft via a support shaft,
In each of the clamp arms, on each of the support shafts that support the clamp pads on the split arms, the clamp pads are interposed between the split arms and the clamp pads and urged toward the direction of separating the clamp pads from each other . Elastic means is provided.
[0006]
According to the invention of claim 1 configured as described above, two roll papers juxtaposed horizontally are clamped at the tip of each split arm that constitutes each clamp arm by closing a pair of clamp arms. When the roll paper is placed vertically by rotating the clamp holder 90 degrees with a rotating device after being clamped from above and below and transported to a predetermined position, if there is a gap between the two roll papers, When the clamp holder is rotated by the rotating device with the clamp being rotated, when a certain angle is reached, the upper roll paper slides downward by the gap together with the clamp pad clamping the roll paper by its own weight, It is mounted on the lower roll paper.
[0007]
Further, in each clamp arm, on the support shaft that supports each clamp pad on each split arm, the clamp pad is interposed between the split arm and the clamp pad and biased toward the direction in which the clamp pads are separated from each other . When the roll holder is vertically placed by rotating the clamp holder by 90 degrees by the rotating device, the sliding speed of the roll paper that slides downward is reduced by the elastic means. Can absorb the shock. In addition, the problem can be achieved with a simple structure, and it can be easily applied to an existing roll clamp device.
[0010]
Note that the width direction in the above description means a direction orthogonal to the clamp direction of the arm. The outward direction of the clamp pad refers to the direction in which both clamp pads are separated from each other.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in FIG. 2, the roll clamp device according to the present embodiment is rotatable around a horizontal axis via a rotating device 3 on the front surface of a lift bracket 2 as a lifting member that is lifted and lowered along a mast 1 of a forklift. It is attached to.
The roll clamp device includes a plate-like clamp holder 4 arranged in a vertical direction, and a movable long arm 5 and a fixed short arm 6 which face each other in an openable and closable manner on the front surface of the clamp holder 4. A pair of long and short clamp arms is provided.
[0012]
As shown in FIG. 1, the long arm 5 includes two split arms 5L and 5R arranged in parallel in the width direction (direction perpendicular to the clamp direction of the arm), and both the split arms 5L arranged in parallel. , 5R are pivotally attached to the clamp holder 4 via a mounting shaft 7 so as to be pivoted individually and simultaneously by hydraulic clamp cylinders 8L, 8R as drive devices. ing.
The clamp cylinders 8L and 8R (see FIG. 2) are pivotally attached to the tip of the clamp holder 4 by a pin 9 so that the tip of the piston rod can be turned to the split arm 5L and 5R by a pin 10. It is pivotally attached.
[0013]
On the other hand, the short arm 6 facing the long arm 5 is also composed of two split arms 6L and 6R arranged side by side in the width direction, and the bases of the split arms 6L and 6R are fixed to the clamp holder 4.
A clamp formed in a curved shape for each arm at the tip of both split arms 5L, 5R constituting the movable long arm 5 and both split arms 6L, 6R constituting the fixed short arm 6 Pads 11 and 12 are attached. Hereinafter, the mounting structure of the clamp pads 11 and 12 will be described with reference to FIG. The clamp pads 11 and 12 are mounted on the long arm 5 side and the short arm 6 side in the same structure.
As shown in the figure, bifurcated pad holder portions 13 each having a substantially U-shape are formed at the ends of the split arms 5L, 5R, 6L, 6R, and the clamp pads 11, 12 are attached to the pad holder portion 13, respectively. It is slidably attached in the width direction (parallel direction) via a cylindrical or cylindrical slide shaft 14.
[0014]
The slide shaft 14 is assembled in a penetrating manner with a protrusion 15 projecting from the back surface of the pad holder portion 13 and the clamp pads 11, 12, and is rotatable and slidable with respect to the pad holder portion 13. The clamp pads 11 and 12 are fixed to the protrusions 15.
On the slide shaft 14, two compression coil springs 16 are interposed as elastic means with one end abutting against the protrusion 15 and the other end abutting against the pad holder portion 13, and clamped by the compression coil spring 16. The pads 11 and 12 are pressed and urged toward the direction away from each other, that is, toward the outside. Accordingly, the clamp pads 11 and 12 arranged in parallel are held at outer positions at a predetermined interval.
[0015]
The roll clamp device according to the present embodiment is configured as described above, and the operation and effect thereof will be described below.
As shown in FIG. 4A, the clamping of the two roll papers W juxtaposed sideways on the floor surface is performed with the fixed short arm 6 positioned on the lower side and the long arm 5 positioned on the upper side. The two roll papers W are individually clamped in the vertical direction by the clamp pads 11 and 12 of the split arms 5L, 5R, 6L, and 6R that make a pair of the long side and the short side.
[0016]
Then, after the roll paper W placed horizontally as described above is clamped and transported to a predetermined position, when the roll paper W is placed vertically at the transport destination, the entire roll clamp device is rotated by 90 degrees. At this time, if there is a gap S between the two roll papers W, as shown in FIG. 4B, when the roll paper W is rotated to a certain angle, the upper roll paper W has its own weight. While the compression coil spring 16 is compressed by this, it slides downward together with the clamp pads 11 and 12 and is brought into contact (mounted) on the lower roll paper W.
[0017]
As described above, according to the present embodiment, the upper roll paper W is slid to the lower roll paper W while the roll clamp device is rotated 90 degrees to shift from the horizontal gripping state to the vertical gripping state. Thus, the interval between the two roll papers W can be automatically reduced.
In addition, the slide of the roll paper W at this time is gradually performed in accordance with the inclination thereof, and the brake is applied by the compression coil spring 16, so that the rapid contact between the roll papers W is prevented. Thus, the roll paper W can be placed vertically without being damaged.
[0018]
After the vertical placement, if the long arm 5 is rotated to release the clamp, the compression coil spring 16 is extended, and the upper clamp pads 11 and 12 are returned to their original positions.
Further, in the present embodiment, the clamp pads 11 and 12 are slidably supported on the distal ends of the split arms 5L, 5R, 6L, and 6R via the slide shaft 14, and the compression coil spring 16 is attached on the slide shaft 14. In spite of the extremely simple structure, it is possible to solve the problem of damage caused by mutual interference of the roll paper W when the two roll papers W after the horizontal grip are placed vertically. Can be easily applied.
Further, according to the present embodiment, since the two compression coil springs 16 are used for each of the clamp pads 11 and 12, a balanced and smooth sliding operation can be obtained.
[0019]
Next, a related technique of the present invention will be described with reference to FIG. In this related technique , a hydraulic slide cylinder 17 is provided for each split arm 5L, 5R, 6L, 6R as means for sliding the clamp pads 11, 12. A double rod type cylinder is used as the hydraulic slide cylinder 17. The cylinder body 17a is fixed to the tip of each split arm 5L, 5R, 6L, 6R, and each clamp pad is attached to the tip of both rods 17b. Projections 15 projecting from the rear surfaces of 11 and 12 are rotatably attached.
In this case, although not shown, each slide cylinder 17 has its hydraulic circuit configured to be individually operable on the driver's seat of the forklift. The rest of the roll clamp device is configured in the same manner as in the embodiment described above.
[0020]
According to the roll clamp device configured as described above, when there is a gap between the roll papers W juxtaposed sideways, the slide cylinders 17 are actuated to position the clamp pads 11 and 12 on the outside. After the roll paper W is clamped in this state, the roll clamp device is rotated 90 degrees so that the roll paper W is in the vertical state, and then the slide cylinders 17 of the clamp pads 11 and 12 that clamp the upper roll paper W. Is driven to slide the roll paper W together with the clamp pads 11 and 12 downward, so that the interval between the roll papers W can be reduced.
Therefore, when the related technology is used, as in the above-described embodiment, after the roll paper W is clamped by the horizontal grip and then rotated 90 degrees and placed vertically, the roll paper W can be rolled even if there is a gap between the roll papers W. Can be placed vertically without damaging the paper.
[0021]
In the embodiment, two compression coil springs 16 are provided for each of the clamp pads 11 and 12, but the number may be reduced to one. Further, the compression coil spring 16 as the elastic means may be changed to a tension coil spring, rubber, or a gas damper. Further, the slide shaft 14 as the support shaft is not limited to a columnar shape or a cylindrical shape, and may be a square shape. In this case, the slide shaft 14 may have a rail shape with a cross-sectional groove shape. Furthermore, a guide member may be added in addition to the slide shaft 14 to further stabilize the slide operation.
[0022]
【The invention's effect】
As described above in detail, according to the present invention, during the loading operation of the roll paper by the roll clamp device, after clamping the two roll paper lateral gripping with, when vertically rotated 90 degrees, two Even if there is a gap between the roll papers, the roll paper can be placed vertically without being damaged. For this reason, it is not necessary to adjust the position of the roll paper so as to close the gap between the two roll papers prior to the horizontal gripping or to clamp the roll papers one by one, thus improving the work efficiency. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a split-type roll clamp device according to the present embodiment.
FIG. 2 is a side view of a roll clamp device mounted on a forklift.
FIG. 3 is a detailed view showing a clamp pad mounting structure.
FIGS. 4A and 4B are diagrams for explaining the operation of the clamp pad, where FIG. 4A shows a side gripping state, and FIG. 4B shows a vertical state rotated 90 degrees from the side gripping state.
FIG. 5 is an explanatory diagram showing related technology .
FIGS. 6A and 6B are explanatory views of cargo handling work by a conventional split-type roll clamp device, where FIG. 6A shows a side gripping state, and FIG. 6B shows a vertical state rotated 90 degrees from the side gripping state.
[Explanation of symbols]
4 ... Clamp holder 5 ... Long arm 6 ... Short arm 5L, 5R, 6L, 6R ... Split arm 11, 12 ... Clamp pad 14 ... Slide shaft 16 ... Compression coil spring

Claims (1)

A roll clamp device that is mounted on a front surface of a lifting member in a forklift so as to be rotatable around a horizontal axis via a rotation device, and is used for a cargo handling operation of roll paper ,
Wherein comprising a clamping holder which is rotated by a rotating device and a pair of clamping arms mounted for clamping and releasing the roll paper in the radial direction by the openable and opening and closing the front of the clamp holder,
Each of the clamp arms is composed of two split arms arranged in parallel in a direction orthogonal to the clamp direction for the roll paper ,
Wherein the tips of the two split arms constituting each clamp arm, each clamping pads are slidably supported in parallel direction of the axial and and both split arms support shaft via a support shaft,
In each of the clamp arms, on each of the support shafts that support the clamp pads on the split arms, the clamp pads are interposed between the split arms and the clamp pads and urged toward the direction of separating the clamp pads from each other . Roll clamp device provided with elastic means for

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