JP4845394B2 - Cargo handling vehicle - Google Patents

Description

  The present invention relates to a cargo handling vehicle that directly supports a cargo and performs a cargo handling operation.

  Some cargo handling vehicles support a pallet on which a load is placed, such as a forklift, and some directly support a load. When carrying out a cargo handling operation using such a cargo handling vehicle, if the load is not reliably supported, the load may drop or the supported load may be deformed. For example, in a cargo handling vehicle equipped with a roll clamp device or the like as a load support means, the load is in a roll shape, so that it is difficult to reliably hold it, and it involves an operation of rotating the load while holding it. If not supported, the load will be dropped during rotation.

Further, since the cargo handling work is often performed in a dark warehouse, the reliable support operation of the roll-shaped load becomes more and more difficult. As an invention for dealing with such a problem, there is one described in Patent Document 1, but this is for confirming the position of the end of a roll-shaped load, so that it is difficult to visually recognize, and the handling work is not always easy. It is not a thing.
JP 11-349293 A

  The present invention can easily confirm the relative positional relationship of the load supporting means with respect to the load, even in a dim warehouse or when the load supporting means rotates like a roll clamp device. An object is to provide a cargo handling vehicle capable of appropriately supporting a load.

  The present invention relates to a cargo handling vehicle having a shaft that is supported by a vehicle body in a predetermined direction, and a load support means that is provided on the opposite side of the vehicle body via the shaft and rotates about the shaft. According to another aspect of the present invention, a light emitting device that irradiates light toward the load supporting means side is provided at the center of the shaft.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that a hole is formed in the center of the shaft, and the light emitter is installed in the hole.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that a hole penetrating the center of the shaft is formed and the light emitter is installed on a center line of the hole on the vehicle body side. In addition, the vehicle body side here means the part which does not rotate on the opposite side to the said load support means.

  Furthermore, the cargo handling vehicle according to the present invention is provided with a shutter member on the center line of the hole on the side opposite to the light emitter, and formed with a slit through which light rays from the light emitter are transmitted. The slit is formed in a shape that changes a transmission shape of the light according to a rotation angle of the load supporting means.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that the shape of the slit is a single horizontal or vertical character.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that the shape of the slit is a cross shape formed of horizontal and vertical lines.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that the light emitter is a laser light emitter that emits a laser beam.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that the laser emitter emits a laser beam whose irradiation surface for the load is in a single character shape or a cross shape.

  Furthermore, the cargo handling vehicle according to the present invention is characterized in that the load support means is a roll clamp device having a bifurcated arm for supporting a roll-shaped load.

  Further, in the cargo handling vehicle according to the present invention, a mast is erected on the vehicle body so as to be able to tilt forward and backward, and a lift bracket is supported on the mast so as to be movable up and down, and the shaft and the light emitter are supported by the lift bracket. It is characterized by that.

  Since the cargo handling vehicle according to the present invention is provided with a light emitting device that irradiates light toward the load support means at the center of the shaft, even if the load support means rotates around the shaft, this rotation angle is maintained. Regardless, the light beam can be applied to the load supported by the load supporting means. For this reason, even when carrying out cargo handling work in a dimly lit warehouse, the load can be illuminated brightly, and the position of the load corresponding to the center of rotation can be easily confirmed. Inconveniences such as dropping at the time of rotation of the load and deformation of the load, which have been a concern, are reduced.

  Further, since the cargo handling vehicle according to the present invention has the light emitter installed in the hole formed in the center of the shaft, the light emitter does not contact the load when the load is supported by the load support means. The advantage that the damage of the load and the failure of the light emitting device hardly occur can be obtained.

  Further, since the hole penetrates the center of the shaft and the light emitter is installed on the center line of the hole on the vehicle body side, even if the load supporting means is rotated, the relative position between the hole and the light emitter is changed. There is no. For this reason, the light irradiated from the light emitter can be passed through the hole regardless of the rotation angle of the load supporting means. Therefore, since it is not necessary to rotate the light emitter together with the load supporting means, it is possible to easily wire an electric wire for supplying power to the light emitter. In addition, failure is less likely to occur by facilitating wiring.

  Furthermore, the cargo handling vehicle according to the present invention forms a slit that transmits light from the light emitter in the shutter member installed on the center line of the hole on the side opposite to the light emitter, and this slit serves as a load supporting means. Since the light transmission shape is changed according to the angle, the operator operating the cargo handling vehicle can recognize the rotation angle of the load supporting means at a glance according to the shape of the irradiation image projected onto the load. In particular, when the shape of the slit is a horizontal or vertical single character, or a cross character consisting of horizontal and vertical lines, the visual recognition accuracy by the operator is improved, and the rotation angle of the load supporting means is slightly reduced. However, if it deviates from the desired angle, the operator can recognize this at a glance.

  Furthermore, when the above-mentioned light emitter is a laser light emitter that emits a laser beam, the laser beam emitted from the light emitter can reach the surface of a load located far from the light emitter without almost diffusing. Therefore, the operator can clearly and easily visually recognize the portion where the laser beam is projected onto the load. Further, if the laser emitter emits a laser beam whose irradiation surface to the load is a single letter or a cross, the operator operating the cargo handling vehicle according to the shape of the irradiation image projected on the load, The rotation angle can be recognized at a glance.

  The effects described above are particularly beneficial when the load support means is a roll clamp device having a bifurcated arm for supporting a roll-shaped load. That is, since the load is securely sandwiched between the bifurcated arms with the position of the load accurately aligned with the center of the shaft, the load is inclined with respect to the arm or the load is biased. There is no gap between the load and the load, and it is possible to reliably prevent the inconveniences described above, which have been feared in the past.

  Furthermore, in the cargo handling vehicle according to the present invention, the mast is erected on the vehicle body so that the mast can tilt forward and backward, and the lift bracket is supported by the mast so as to be movable up and down. For this reason, when the mast tilts back and forth, the lift bracket tilts, and the shaft and the light emitter supported by the lift bracket also tilt at the same angle as the mast. Therefore, the effects described above can be achieved regardless of the inclination angle of the mast, whether the mast is upright or tilted back and forth.

  As an embodiment of a cargo handling vehicle according to the present invention, an example of a forklift provided with a roll clamp device will be described below with reference to the drawings.

  As shown in FIG. 1, in a cargo handling vehicle according to the present invention, a mast 2 is erected on a front portion of a vehicle body 1, that is, a front portion in a running direction so as to be able to tilt back and forth. Is supported to be movable up and down. As the hydraulic cylinder 4 expands and contracts, the lift bracket 3 is moved up and down along the mast 2 through a chain (not shown). Reference numeral 5 denotes a plurality of rollers provided on the lift bracket 3 so as to be freely rollable. When the rollers 5 come into contact with the mast 2 and rotate, the lift bracket 3 is raised and lowered smoothly.

  A roll clamp device 6 serving as a load support means is supported further on the front part of the vehicle body of the lift bracket 5, and a seat 7 for the operator to ride on the central part of the vehicle body 1 and the operator for operating the same. Driving operation devices 8 are respectively provided. The operator sits on the seat 7 and appropriately operates the driving operation device 8 to cause the vehicle body 1 to travel, raise and lower the lift bracket 3, tilt the mast 2, or operate the roll clamp device 6. Can do.

  2 and 3, the roll clamp device 6 includes a base body 10 fixed to the lift bracket 3 and a rotating body 11 rotatably supported by the base body 10, and the rotating body 11 is a disk. And a bifurcated arm 13 that opens and closes and is supported by the pedestal 12. A motor 14 is installed on the base 10, and the rotational driving force of the motor 14 is transmitted to the rotary body 11 via a gear (not shown), whereby the rotary body 11 is directed toward the base 10 toward the front of the vehicle body. It rotates around a shaft 15 provided. Also, the arm 13 is provided with a hydraulic cylinder 16, and when the cylinder 16 is driven, the arms 13 can open and close so as to approach or separate from each other to grip the roll-shaped load L. I can do it. Therefore, as shown in FIG. 2, when the arm 13 grips the roll-shaped load L, the center line A between the arms 13 is always the circle center C of the load L regardless of the diameter of the load L. Will pass. The center line A is set so as to coincide with the rotation center line of the arm 13 described above, and therefore the rotation center line A of the arm 13 passes through the circle center C of the load L.

  As shown in FIG. 3, the shaft 15 is fixed at the center position of the base 10 in the vertical and horizontal directions and at the center position of the arm 13 in the vertical and horizontal directions so that the direction is perpendicular to the mast 2. In addition, a linear hole 17 is formed through the shaft center, and a light emitter 18 is inserted and fixed in the hole 17. The light emitter 18 emits a laser beam B to the front side of the vehicle body 1, that is, the arm 13 side (right direction in FIGS. 2 and 3). The laser beam B emitted from the light emitter 18 is The load L existing in front of the vehicle body is irradiated through the center of 13. That is, the laser beam B is irradiated toward the circle center C of the load L through the rotation center line A of the arm 13. In this embodiment, the center line A is drawn from the light emitter 18 so that the shape of the irradiated portion of the load L becomes a single character shape, that is, when the load L is viewed, the shape of the single character is drawn by the laser beam B. A laser beam B spreading in a fan shape horizontally and horizontally as the center of the angle is emitted.

  A plate-like shutter 19 fixed to the pedestal 12 is disposed in front of the light emitter 18 in the vehicle body. In the present embodiment, the shutter 19 has a single-letter-shaped slit 20 having a predetermined length centered on the center of the light emitter 18, that is, the center line A through which the laser beam B passes. . The shutter 19 is configured as a member that allows the laser beam B to pass through the slit 20, but blocks the passage of the laser beam other than the slit 20. The slit 20 is formed to have a horizontal single character when the arm 13 is in the left-right position shown in FIG. 4A, that is, at the same height relative to the ground.

  The cargo handling vehicle according to the present invention is configured as described above, and the laser beam B emitted from the light emitter 18 always passes through the slit 20 of the shutter 19 and irradiates the front of the vehicle body. Since the light emitter 18 always emits the laser beam B so as to pass through the central position of the arm 13 in the vertical and horizontal directions, when the arm 13 grips the center of the load L, the laser beam B passes through the center of the load L. Irradiate. Therefore, when the load L is in a roll shape and the arm 13 grips the central portion in the axial direction of the load L, the laser beam B irradiates the axial position and the radial center position of the load L. If a predetermined mark is attached to the central portion in the axial direction of the roll-shaped load L, the laser beam B will irradiate the mark at this time, and the arm 13 grips the central portion of the load L. It can be visually recognized.

  Since the light emitter 18, the shutter 19 and the arm 13 are all supported by the lift bracket 3, even if the lift bracket 3 moves up and down along the mast 2, or the lift bracket 3 tilts together with the mast 2. However, the irradiation position of the laser beam B on the load L held by the arm 13 does not change. Further, since the light emitter 18 and the slit 20 of the shutter 19 are both disposed at the center position in the vertical and horizontal directions of the arm 13, even if the arm 13 is rotated by the motor 14, the load L held by the arm 13. The irradiation position of the laser beam B with respect to does not change.

  Further, even if the arm 13 is rotated by the motor 14, the light emitter 18 does not rotate and its position does not change. However, as shown in FIGS. 19 rotates and the slit 20 turns like a clock hand. Therefore, as shown in FIG. 5, when the roll-shaped load L is placed on the floor or the like with its axis as the vertical direction, if the arm 13 is in the left-right position shown in FIG. It passes through the slit 20 and spreads in the left-right direction, and as shown in FIG. If the arm 13 is inclined at an angle (α) shown in FIG. 4B, the laser beam B passes through only the central portion of the slit 20 and becomes a straight line. As shown in FIG. A point-like irradiation image F is drawn on L.

  Therefore, the operator of the forklift can know the angular relationship between the arm 13 and the load L by visually recognizing the shape of the irradiation image F. In the present embodiment, when an irradiation image F having a single horizontal character shape as shown in FIG. 5A is recognized, it can be said that the arm 13 has an appropriate angular relationship for gripping the load L. The operator may rotate the arm 13 until the horizontal single-letter irradiation image F shown in FIG. 5A is formed, and perform the gripping operation of the load L at the time when the arm 13 is formed.

  In the above-described embodiment, the laser beam B emitted from the light emitter 18 has a single character shape. However, it may have a cross shape. In this case, if the arm 13 is in the left-right position shown in FIG. Draw. If the laser beam B is rotated by 90 degrees from the position shown in FIG. 4A, the vertical character portion of the laser beam B passes through the slit 20 and spreads in the vertical direction, and an irradiation image F having a single vertical character shape is drawn on the load L. Therefore, the operator of the forklift can know the angular relationship between the arm 13 and the load L by visually recognizing the shape or inclination of the irradiation image F. That is, when the roll-shaped load L is in a posture in which the axis thereof is vertical, when the irradiation image F having a single letter shape horizontal to the ground is recognized, it is appropriate for the arm 13 to hold the load L. It can be said that there is a proper angular relationship. Further, when the roll-shaped load L is in a posture with its axis in the horizontal direction, the arm 13 grips the load L when a single letter-shaped irradiation image F perpendicular to the ground is recognized on the load L. It can be said that it is in an appropriate angular relationship.

  Similarly, the laser beam B may have a horizontal character shape, and the slit 20 of the shutter 19 may have a cross shape. Even in this case, if the arm 13 is in the left and right position shown in FIG. 4A, the laser beam B draws an irradiation image F in the horizontal single letter shape on the load L, and rotates 90 degrees from that position. Then, the laser beam B draws an irradiation image F in the shape of a single letter on the load L.

  As described above, various shapes of the laser beam B emitted from the light emitter 18 and the shape of the slit 20 of the shutter 19 can be employed, and projected onto the load L as the shutter 20 rotates. If the shape of the image to be changed changes, the relative angle between the arm 13 and the load L can be easily known.

  In each of the above-described embodiments, the light emitter 18 emits the laser beam B. However, the present invention is not limited to this, and lamps such as an incandescent lamp can also be adopted. In this case, the shape of the image projected onto the load L is not clear as compared with the laser beam B, but the load L can be illuminated more brightly, which is effective for visually checking the load in a dark warehouse. . Therefore, in this case, the light from the incandescent lamp does not have a special shape as in the case of the laser beam B described above, and the slit 20 can be eliminated. Since the position of the light from the incandescent lamp is not affected by the rotation of the arm 13, the object to be conveyed can be accurately and easily visually confirmed. The operator may set the position of the light at the center of the load L, then rotate the arm 13 to set the angle to an appropriate one, and then hold the load L.

  In the present invention, the light emitter 18 needs to be provided in a portion that maintains a fixed position regardless of the rotation of the arm 13, and therefore needs to be installed on the shaft 15 positioned at the rotation center of the arm 13. The light emitter 18 may be provided on the shaft 15. However, since the light emitter 18 may be damaged by contact with the load L, the light emitter 18 is connected to the shaft 15 as in the embodiment. It is preferable to install in the hole 17 formed so that contact between the light emitter 18 and the load L can be avoided. The hole 17 does not necessarily need to be formed through the shaft 17, but by forming the hole 17 through the shaft 17, it is convenient because an electrical wiring to the light emitter 18 can be inserted into the hole 17.

  A switch for turning on or off the light emitter 18 is installed in the above-described driving operation device 8. A switch for rotating and opening / closing the roll clamp device 6 is also installed in the operation device 8.

It is a side view of the cargo handling vehicle which concerns on embodiment of this invention. It is a top view which shows the load support means of the cargo handling vehicle which concerns on embodiment of this invention. It is a vertical side view which shows a part of load support means of the cargo handling vehicle which concerns on embodiment of this invention. (A) is a front view which shows the state in which the load support means of the cargo handling vehicle which concerns on embodiment of this invention exists in a reference position, (b) is a front view which shows the state which the load support means rotated. (A) (b) is a perspective view which shows typically an example of the work process by the cargo handling vehicle which concerns on embodiment of this invention, respectively.

Explanation of symbols

1: Car body 6: Roll clamp device (load support means)
13: Arm 15: Shaft 17: Hole 18: Light emitter 19: Shutter 20: Slit B: Laser beam L: Load

Claims (8)

A cargo handling vehicle comprising: a shaft supported by a vehicle body in a predetermined direction; and a load support means provided on a side opposite to the vehicle body via the shaft and rotating about the shaft. And a light emitting device for irradiating light toward the load supporting means side on the center line of the hole on the vehicle body side . A shutter member is installed on the center line of the hole on the side opposite to the light emitter, and a slit is formed in the shutter member for transmitting light from the light emitter. The slit is a rotation angle of the load supporting means. The cargo handling vehicle according to claim 1 , wherein the cargo handling vehicle is formed in a shape that changes a transmission shape of the light according to the condition. The cargo handling vehicle according to claim 2 , wherein the slit has a horizontal or vertical single letter shape. The cargo handling vehicle according to claim 2 , wherein the slit has a cross shape formed of horizontal and vertical lines. 5. The cargo handling vehicle according to claim 1, wherein the light emitter is a laser light emitter that emits a laser beam. The cargo handling vehicle according to claim 5 , wherein the laser light emitter irradiates a laser beam having an irradiation surface with respect to the load in a single character shape or a cross character shape. The cargo handling vehicle according to any one of claims 1 to 6, wherein the load support means is a roll clamp device having a bifurcated arm for supporting a roll-shaped load. Mast is tiltable upright longitudinal to the vehicle body, the lift bracket to the mast is vertically movably supported, claims 1 to 7 wherein the shaft and the light emitter is characterized in that it is supported by the lift bracket A cargo handling vehicle according to any one of the above.

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