JP3899682B2 - 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 used for cargo handling work of a roll-like article (hereinafter referred to as roll paper) such as newspaper or kraft paper.
[0002]
[Prior art]
As shown in FIG. 4, the roll clamp device that is mounted on a forklift and used for handling paper rolls includes a clamp holder 4 having a pair of long and short clamp arms 5 and 6. In general, a short clamp arm 5 called a short arm is fixed (also movable for position adjustment), whereas a long clamp arm 6 called a swing arm is movable. The clamp holder 4 is rotatably attached to the clamp holder 4 and is rotated by the clamp cylinder 7.
In addition, clamp pads 8 and 9 for clamping the roll paper W are rotatably attached to the tips of the clamp arms 5 and 6 by hinge pins 10 so as to correspond to the curved surface of the roll paper W. Yes.
FIG. 4 shows a vertically gripped state of the roll paper W placed vertically on the floor (when the roll paper W is clamped from the left and right directions), and the rotation centers of both the clamp pads 8 and 9 are connected. The state (a) where the straight line passes through the center O of the roll paper W is an ideal proper clamp state, and the state (b) where the straight line is off the center O of the roll paper W is not an appropriate clamp state. .
[0003]
[Problems to be solved by the invention]
The clamping device as described above does not include a means for an operator on the driver's seat to check the proper clamping state of the roll paper W, and the judgment of the quality of the clamping state is left to the operator's feeling and experience exclusively.
As a result, there is a clamping failure, that is, a so-called deep gripping state or a shallow gripping state in which the center O of the roll paper W is deviated forward or backward from a straight line connecting the rotation centers of the clamp pads 8 and 9. There is a possibility that the cargo handling operation may be continued without knowing, and in that case, there is a possibility that the roll paper W may fall off during transportation. In particular, when the diameter of the roll paper W to be handled is not known, it is difficult to judge whether the clamped state is good or bad.
[0004]
The present invention has been made in view of the above-described conventional problems, and the object of the present invention is to enable proper clamping of the roll paper during the cargo handling operation by the roll clamping device, and to prevent the roll paper from falling off. It is to prevent it.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. That is, the invention of claim 1 is a roll clamp device that is used by being mounted on a forklift, and clamps the fixed short arm, a swinging long arm facing the short arm, and the short arm. And a guide beam irradiating means for irradiating a guide beam for guiding to an appropriate clamp position for the power roll paper, and the guide beam irradiating means is provided for each of a plurality of roll papers having different diameters .
[0006]
When a roll paper is clamped by a roll clamp device equipped with a fixed short arm and a swing-type long arm, the ideal fit is when the straight line connecting the clamp centers of both arms passes through the center of the roll paper. Clamped state.
Therefore, in the invention of claim 1 configured as described above, a specific part of the roll paper handled by the guide beam irradiated from the guide beam irradiation means, for example, the outer periphery on the short arm side, in the proper clamp state If the irradiation position of the guiding beam is set in advance so as to abut against the both ends of the outer peripheral surface of the surface end portion or the short arm side and the long arm side from the tangential direction, the operator at the time of clamping the roll paper, It is possible to clamp the roll paper in an appropriate clamped state by guiding the vehicle while visually confirming that the beam irradiation point always holds the specific position. As a result, it is possible to prevent the roll paper from being accidentally dropped during transportation.
[0007]
Further, the guide beam irradiation means is provided for each of a plurality of roll papers having different diameters. Therefore, it is possible to obtain a proper clamping state by the beam corresponding to the roll diameter selectively selectively use it for different plurality of paper roll diameter, possible to prevent the falling accident of the roll paper during transport Can do.
[0008]
According to a second aspect of the present invention, in the roll clamp device according to the first aspect of the present invention, the beams irradiated from the plurality of guided beam irradiation means are color-coded by different colors for each roll diameter. According to the invention of claim 2 having such a configuration, since the beam to be used can be determined by color, it is effective in preventing misidentification.
[0009]
The invention of claim 3 is a roll clamp device used by being mounted on a forklift, wherein a fixed short arm, a swing type long arm opposed to the short arm, and a diameter of the roll paper to be clamped are determined. Measuring beam irradiation means for irradiating a plurality of measurement beams side by side toward the roll paper for measurement, and guiding the short arm to the optimum clamping position for the roll paper based on the diameter obtained by the measurement beam irradiation means And a guiding beam irradiating means for irradiating a guiding beam for the purpose.
[0010]
According to the invention of claim 3 configured as described above, when the roll paper is clamped, first, the diameter of the roll paper is determined according to how many roll diameter measurement beams irradiated from the measurement beam irradiation means hit the roll paper. to decide. For example, when the number of irradiation points of the beam hitting the roll paper is a, the diameter is Da, and when the number of irradiation points is b, the diameter is set in advance such that it is Db. Thus, the diameter can be known from the number of irradiation points hitting the roll paper.
On the other hand, the proper clamping position of the short arm with respect to the roll paper, that is, the contact position with respect to the roll paper capable of obtaining the proper clamp state is uniquely determined for each roll diameter. Therefore, if the diameter of the roll paper is known as described above, the vehicle is guided based on the beam corresponding to the roll paper having the diameter out of the guide beams that are irradiated from the guide beam irradiation means and hit the roll paper. By doing so, the short arm can be brought into contact with the appropriate clamping position of the roll paper.
In this way, if the short arm is brought into contact with the roll paper and then the long arm is operated to come into contact with the roll paper, the roll paper will be clamped in an appropriate clamp state, and the roll paper may be dropped during transportation. Can be prevented in advance.
[0011]
According to a fourth aspect of the present invention, in the roll clamp device according to the third aspect , a measurement beam irradiating means is constituted by a number of measurement beam irradiators provided side by side on a clamp holder for supporting an arm, and the measurement beam irradiation is performed. The guide beam irradiating means is composed of the reference beam beam irradiator provided separately from the measuring beam irradiator.
[0012]
According to the invention of claim 4 configured as described above, when the roll paper is clamped, the diameter of the roll paper to be clamped is first determined by the number of irradiation points of the beam irradiated from the measuring beam irradiator and hitting the roll paper. Judging.
On the other hand, the roll paper to be clamped by the number of irradiation points of the measurement beam hitting the roll paper on the short arm side or the long arm side based on the irradiation point of the beam hitting the roll paper irradiated from the reference position display beam irradiator It is possible to determine the proper clamp position of the short arm corresponding to, and to bring the short arm into contact with the proper clamp position of the roll paper by guiding the vehicle so that the number of irradiation points of the measurement beam does not change. .
In this way, if the short arm is brought into contact with the roll paper and then the long arm is operated to come into contact with the roll paper, the roll paper will be clamped in an appropriate clamp state, and the roll paper may be dropped during transportation. Can be prevented in advance.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, related technologies will be described with reference to FIGS. FIG. 1 is a perspective view showing a roll clamp device.
As shown in the figure, the roll clamp device includes a clamp holder 4 having a vertical direction as a plane direction, and the clamp holder 4 is provided on a 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 so as to be rotatable around a horizontal axis.
[0014]
The clamp holder 4 is provided with a pair of long and short clamp arms that can be opened and closed, that is, a fixed short arm 5 and a swing type long arm 6, and the short arm 5 is fixed to the clamp holder 4 at the base end (for position adjustment). The long arm 6 has a base end rotatably attached to the clamp holder 4 by a support shaft and is rotated by a clamp cylinder 7 (see FIG. 4).
Clamp pads 8 and 9 having a clamp surface as a curved surface are attached to the tips of both clamp arms 5 and 6 by hinge pins 10 so as to be able to rotate corresponding to the curved surface of the roll paper W, and a pad stopper ( The rotation range is regulated by (not shown).
[0015]
The roll clamp device having the above-described configuration is used for a vertical gripping operation for clamping the roll paper W from the left and right directions by the short arm 5 and the long arm 6 and a horizontal gripping operation for clamping the roll paper W from the vertical direction. In this case, it is relatively easy to obtain a proper gripping state when the short arm 5 can be positioned with respect to the roll paper W with respect to the floor surface. Defects are likely to occur.
[0016]
In view of this, in the related technology , the roll paper W can be clamped in an appropriate clamped state for handling one type of roll paper W having a diameter D when the roll paper W is vertically held. It is.
For this reason, in this related technique , when the roll paper W is clamped, a guide beam (light beam) for guiding the short arm 5 to an appropriate clamping position of the roll paper W to be clamped is irradiated toward the roll paper W. One beam irradiator 12 as a guide beam irradiating means is provided.
The beam irradiator 12 is attached via a beam mounting bracket 11 so that the beam is radiated straight forward toward the front side of the short arm 5 which is the upper surface when the clamp holder 4 is vertically gripped. . As the beam irradiator 12, for example, a laser beam or a light emitting diode is used. In short, the operator on the driver's seat can visually confirm the irradiation point of the beam hitting the roll paper W through the mast. Anything is acceptable.
[0017]
This related technology is configured as described above, and the roll paper W is clamped by the roll clamp device after the short arm 5 is brought into contact with the roll paper W by operating the forklift, as shown in FIG. This is done by rotating the long arm 6.
In this case, the straight line connecting the rotation centers (hinge pins 10) of the clamp pads 8 and 9, which are the clamp centers of the arms 5 and 6, is clamped so as to pass through the center O of the roll paper W (a) in FIG. Is the ideal proper clamp state, and the proper clamp position of the short arm 5 with respect to the roll paper W at that time is uniquely determined by the diameter D of the roll paper W. Note that the state shown in FIG. 4B is an improper clamping state in which the center O of the roll paper W deviates from the straight line connecting the clamping centers.
[0018]
Therefore, as shown in FIG. 2, in the above-described proper clamp state, a specific part of the roll paper W handled by the beam irradiated from the beam irradiator 12, for example, the end of the outer peripheral surface on the short arm 5 side is tangentially The mounting position of the beam irradiator 12 is set in advance so as to make contact.
If the setting is made as described above, the operator holds the specific position of the irradiation point P of the beam irradiated to the roll paper W from the beam irradiator 12 every time the roll paper is clamped (not removed). ), The short arm 5 can be guided to the proper clamping position of the roll paper W and brought into contact therewith.
Therefore, if the swing type long arm 6 is rotated at that position, the roll paper W is clamped in an appropriate clamped state, and as a result, the roll paper W can be prevented from dropping off during transportation. Can do.
[0019]
The above explanation is for the case where the guide beam irradiating means is constituted by a single beam irradiator 12, but as shown in FIG. 3, the guide beam irradiating means are arranged in two pairs on the left and right sides arranged at predetermined intervals. The beam irradiator 12 may be used.
In this case, the arrangement interval of both beam irradiators 12 corresponds to the diameter D of the roll paper W so that the irradiation points P of both beams are at both ends of the short arm 5 side and the long arm 6 side in the proper clamp state. If the interval is set to a slightly narrow interval, the operator guides the vehicle so as not to remove both irradiation points P when clamping the roll paper W, thereby clamping the roll paper W in an appropriate clamped state. It becomes possible.
[0020]
Next, a first embodiment of the present invention will be described with reference to FIG. This embodiment is based on the related art, in particular, the method of guiding the short arm 5 by the pair of left and right beam irradiators 12 shown in FIG. 3, and handles a plurality of types of roll paper W having different diameters. Can be adapted to.
For this purpose, in the first embodiment, the clamp holder 4 is provided with a plurality of pairs, for example, two sets of beam irradiators 12 and 13 that make a pair on the left and right. In each set of beam irradiators 12 and 13, as shown in the figure, the irradiation points P1 and P2 of the beam hitting the roll paper W in each set are both ends of the outer peripheral surface on the short arm 5 side and the long arm 6 side, respectively. Thus, the interval corresponding to the diameters D1 and D2 of the roll paper W is set.
[0021]
According to the first embodiment configured as described above, when the roll paper W is clamped, the short arm 5 is appropriately set in accordance with the irradiation point P1 or P2 of the beam corresponding to the roll paper W having the diameter. The vehicle can be guided to be positioned at the clamp position. As a result, a plurality of types of roll paper W having different diameters can be clamped in an appropriate clamp state.
Therefore, in the case of the first embodiment, the paired beam irradiators 12 or 13 constitute guided beam irradiating means for irradiating a beam for guiding the short arm 5 to an appropriate clamp position, and beam irradiation in units of groups. The measuring devices 12 and 13 constitute a measuring beam irradiating means for irradiating the diameter measuring beam of the roll paper W to be clamped.
[0022]
In the first embodiment, for example, it is desirable to use a configuration using light emitting diodes as the beam irradiators 12 and 13 and changing the color of the beam for each group. In that case, the beam to be used can be determined by color coding, which is effective in preventing misidentification.
[0023]
Next, a description will be given of a second embodiment of the present invention in FIGS. In this embodiment, as shown in FIG. 6, a beam mounting bracket 11 made of a horizontally long plate is provided on the upper surface of the clamp holder 4, and a number of beam irradiators 12 are arranged horizontally at equal intervals on the beam mounting bracket 11. In particular, two beam irradiators 14 are arranged one above the other for displaying the reference position on the center line of the vehicle.
[0024]
This embodiment is configured as described above. Accordingly, at the time of clamping the roll paper W, as shown in FIG. 7, the beam is irradiated side by side in the radial direction of the roll paper W from the beam irradiator 12. The diameter D of the roll paper W is determined depending on whether it is hit. That is, the diameter is set to Da when the number of irradiation points of the beam hitting the roll paper is a, and the diameter is set to Db when the number of irradiation points is b. Thus, the diameter can be known from the number of irradiation points hitting the roll paper.
[0025]
On the other hand, the proper clamp position of the short arm 5 with respect to the roll paper W is uniquely determined for each roll diameter as described above. Accordingly, it is possible to predetermine an appropriate clamp position for each roll diameter by counting from the beam irradiation point P1 of the beam irradiator 14 for displaying the reference position, for example, by the number of beam irradiation points P hitting the short arm 5 side. it can.
Therefore, at the time of actual clamping work, the vehicle is guided so that the number of irradiation points P hitting the short arm side from the reference point P1 maintains the index number corresponding to the diameter of the roll paper W to be clamped (not increased or decreased). By doing so, the short arm 5 can be guided to an appropriate clamping position corresponding to the roll paper W having the diameter.
[0026]
In this way, after guiding the short arm 5 to contact the roll paper W, if the long arm 6 is operated to clamp the roll paper W, the roll paper W is clamped in an appropriate clamp state. It is possible to prevent the roll paper W from dropping off during transportation.
Therefore, in the second embodiment, a measuring beam irradiating means for irradiating a measuring beam for measuring the diameter of the roll paper W to be clamped is configured by a large number of beam irradiators 12 provided side by side. A guide for irradiating a guide beam for guiding the short arm 5 to an appropriate clamp position by the beam irradiator 14 for displaying the reference position and the plurality of beam irradiators 12 arranged on the short arm 5 side from the reference beam irradiator 14. It constitutes a beam irradiation means.
[0027]
In the second embodiment, the beam irradiator 12 constituting the measurement beam irradiating means is also used as the guiding beam irradiating means. However, as the dedicated guiding beam irradiating means, a plurality of pairs forming the pairs shown in FIG. The beam irradiators 12 and 13 may be used. In that case, it is desirable to color-code the beam for each roll diameter.
Further, the embodiment has been described in the case of the vertical gripping, but the beam irradiator is used so that the operator on the driver's seat can visually recognize the beam irradiated on the roll paper W even in the case of the horizontal gripping. If it is possible to arrange, it is desirable to apply not only the vertical grip.
In addition, the clamp holder 4 is optimal as the mounting position of the beam irradiators 12, 13, and 14. However, the clamp holder 4 is not necessarily limited to this, and the operator on the driver's seat can confirm it visually. In addition, any position where the beam can be irradiated toward the roll paper W may be used.
Furthermore, the beam irradiators 12, 13, and 14 may be attached so that their positions can be adjusted .
[0028]
【The invention's effect】
As described in detail above, according to the present invention, the vehicle can be guided so that the short arm is at the proper clamp position using the beam irradiated to the roll paper during the cargo handling operation by the roll clamp device. As a result, the roll paper can be clamped in an appropriate clamped state. For this reason, it is possible to improve the work efficiency and prevent the roll paper from dropping off during transportation.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a roll clamp device.
FIGS. 2A and 2B are explanatory views of arm guidance by beam irradiation according to the related art , in which FIG. 2A is a plan view and FIG. 2B is a side view;
FIGS. 3A and 3B are arm guide explanatory views showing a modification example related to the arrangement of the beam irradiator in the related art , where FIG. 3A is a plan view and FIG. 3B is a side view.
FIGS. 4A and 4B are explanatory diagrams illustrating how to clamp a roll paper, in which FIG. 4A shows an ideal proper clamp state, and FIG. 4B shows an improper clamp state.
5A and 5B are explanatory views of arm guidance by beam irradiation according to the first embodiment, in which FIG. 5A is a plan view, FIG. 5B is a plan view in the case of a small-diameter roll paper, and FIG. It is a plan view of the case.
FIG. 6 is a perspective view of a roll clamp device according to a second embodiment.
7A and 7B are explanatory views of arm guidance by beam irradiation according to the second embodiment, where FIG. 7A is a plan view and FIG. 7B is a side view.
[Explanation of symbols]
4 ... Clamp holder 5 ... Fixed short arm 6 ... Swing type long arm 11 ... Beam mounting bracket 12, 13, 14 ... Beam irradiator

Claims (4)

A roll clamp device mounted on a forklift for use, which is a fixed short arm, a swing-type long arm facing the short arm, and guiding the short arm to an appropriate clamp position for the roll paper to be clamped And a guide beam irradiating means for irradiating a guide beam for performing the operation, and a roll clamp device provided with the guide beam irradiating means for each of a plurality of roll papers having different diameters . The roll clamp apparatus according to claim 1, wherein the beams irradiated from the plurality of guide beam irradiation means are color-coded according to different colors for each roll diameter.   A roll clamping device used by being mounted on a forklift, comprising a fixed short arm, a swinging long arm facing the short arm, and the roll paper for measuring the diameter of the roll paper to be clamped A measuring beam irradiating means for irradiating a plurality of measuring beams side by side, and a guiding beam for guiding the short arm to the optimum clamping position for the roll paper based on the diameter obtained by the measuring beam irradiating means A roll clamp device comprising a guide beam irradiation means for irradiation. 4. The roll clamp apparatus according to claim 3 , wherein a measurement beam irradiation means is constituted by a number of measurement beam irradiators provided side by side on a clamp holder for supporting an arm, the measurement beam irradiator and the measurement beam. A roll clamp device in which a guide beam irradiation means is constituted by one reference position display beam irradiation device provided separately from the irradiation device.

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