JP6725165B2 - Reversing device - Google Patents

Description

The present invention relates to a reversing device for hollow plate-shaped building materials such as cement panels.

In recent years, cement panels called extrusion-molded cement boards have been widely used for outer walls of office buildings and the like. This cement panel is lightweight, and also has excellent fire resistance and sound insulation.

On the back surface of these cement panels, it is necessary to previously attach metal fittings for installation to aggregates such as beams. Since a plurality of cement panels are transported in a stacked state, the above-mentioned metal fittings are generally installed on site. Therefore, it is necessary to work to invert the cement panel on site.

FIG. 15 is a diagram showing a conventional molded panel sorting device 101.

The sorting apparatus 101 of FIG. 15 can take out the uppermost one panel from a pile of molded panels stacked horizontally in a construction site. Further, the taken-out panel can be transferred to the dolly in a horizontal state or in a state of standing upright.

The sorting device 101 has a movable frame 102 including a vertical frame 102a and a horizontal frame 102b. The frame 102 has wheels 103 in the front and free wheels 104 in the rear.

Further, an arm 107 having a clamp means 106 is attached to an elevating pedestal 105 arranged so as to be able to ascend and descend along the vertical frame 102a so as to be rotatable upward. The clamp means 106 is composed of a panel stopper 108 provided in the middle of the arm 107 and a clamp member 109 at the tip.

The arm 107 is further held in a state of being suspended by a wire 110 at an intermediate position, and can be tilted upward by winding a winch 111 provided on the upper end of the vertical frame 102a.

When the sorting device 101 having such a structure is used, the stacked uppermost panel can be clamped and lifted by the clamp means 106, and the winch 111 can be rolled up and tilted in the lifted state. is there.

Therefore, the sorting device 101 is useful for the work of attaching the metal fitting to the back surface of the cement panel. Further, the sorting device 101 can move the cement panel in a lifted state, and can transport the cement panel to the mounting position.

The sorting device 101 having such a configuration is described in Patent Document 1.

Japanese Patent Laid-Open No. 05-149005

In the sorting apparatus 101 as shown in FIG. 15, in order to lift the cement panel in good balance, it is necessary to accurately align the cement panel with the intermediate position.

However, since cement panels of various lengths are often mixed and stacked, it is necessary to move the sorting apparatus 101 each time in accordance with the intermediate position in the longitudinal direction of each cement panel. It becomes complicated.

Therefore, an object of the present invention is to provide a reversing device capable of easily reversing a plate-like building material without performing alignment to an intermediate position.

In order to achieve the above-mentioned object, the reversing device of the present invention is a hollow plate-shaped building material in which a plurality of through-holes are formed in parallel, can be held and reversed so as to be sandwiched in the extending direction of the through-holes, a pair of In the reversing device, at least two forks that can be inserted into the through holes are arranged in parallel, and a rotating shaft is arranged in parallel with the extending direction of the forks and above the forks, and the holding part is provided. And a lifting drive unit that drives the rotation drive unit up and down.

Further, in addition to the above configuration, the reversing device of the present invention is characterized in that the tip end side of the fork is formed to have a larger diameter over the entire circumference than the base end side.

Further, in the reversing device of the present invention, in addition to the above configuration, at least one of the rotation drive unit and the elevation drive unit is driven by an electric motor having a characteristic that the rotation speed decreases with an increase in load. Is characterized by.

Further, in the reversing device of the present invention, in addition to the above configuration, each of the paired configurations is provided with receiving means for receiving respective control signals of the rotation control of the rotation drive unit and the elevation control of the elevation drive unit. , Each of the receiving means is set to the same channel.

Further, the reversing device of the present invention is characterized in that, in addition to the above configuration, the holding portion includes an extension/contraction mechanism capable of extending/contracting the fork.

Further, in the reversing device of the present invention, in addition to the above configuration, in the elevating/lowering drive unit, the two channel steels are arranged so that their groove sides face each other in the width direction, and both two end edges are rearward. It is characterized by having a pillar that is bent toward.

In addition to the above configuration, in the reversing device of the present invention, in addition to the above-mentioned configuration, the rotation driving unit abuts in a width direction with a first roller that is in contact with the inner wall of the column in the front-back direction and can roll up and down. It is characterized in that it is provided with a sliding contact portion having a second roller which is in contact with and can roll up and down.

Further, the reversing device of the present invention is characterized in that, in addition to the above configuration, a reinforcing rib that spreads outward at least from the rear side and the width direction is formed in an intermediate region in the vertical direction of the pillar.

Further, in the reversing device of the present invention, in addition to the above configuration, a reinforcing plate that is harder than the support pillar is provided between an inner wall in the width direction of the support pillar and the second roller. To do.

As described above, according to the present invention, since the two forks of the holding unit are arranged in parallel below the rotation axis of the rotary drive unit, the rotation range (0 to 90 degrees) in the first half of the reversing operation is set. Torque range is larger than the torque in the rotation range (90 to 180 degree range) in the latter half of the reversing operation. Accordingly, in the first half of the rotation range, in other words, in the initial stage of the reversing operation, it becomes easy to detect the state of the synchronization deviation from the difference in loads between the devices which becomes remarkable.

Further, according to the present invention, in addition to the above effects, even when the fork is bent by the load of the plate-shaped building material, as long as it is within the range of the difference in diameter between the distal end side and the proximal end side, Since it is possible to prevent the contact between the base side and the plate-shaped building material, the plate-shaped building material can be safely placed at the position that has penetrated into the through hole by the length of the fork so that the load is not applied to the open end where damage such as chipping is likely to occur. Can be supported.

Further, according to the present invention, in addition to the above effects, when the synchronization shift occurs, the reversing device that operates first has a larger relative load compared to the trailing side, so that the reversing device rotates depending on the load difference. By utilizing the characteristic of the electric motor whose number decreases, it becomes possible to reduce the synchronization deviation with the trailing side.

Further, according to the present invention, in addition to the above effects, since the pair of inverting devices each include the receiving unit set to the same channel, the same operation can be performed by receiving a single control signal.

Further, according to the present invention, in addition to the above effects, after the reversing device main body is disposed close to the opening side of the through hole of the plate-like building material, the fork is extended or contracted to insert or insert the fork into the through hole. It becomes possible to easily detach.

Further, according to the present invention, in addition to the above effects, since the edge of the channel steel is bent rearward, the strength in the front-rear direction is improved. In particular, the portion bent and extended from the rear edge can be connected to a structure such as a rear frame, so that it is possible to prevent the column from tilting forward.

Further, according to the present invention, in addition to the above effects, the sliding contact portion having the first roller and the second roller is housed inside the support column, so that the configuration can be made compact.

Further, according to the present invention, in addition to the above effects, at least the reinforcing rib is formed so as to spread outward from the rear and the width direction, so that the support pillar is formed by the pressure from the first and second rollers provided therein. Can be prevented from expanding and deforming.

Further, according to the present invention, in addition to the above-described effects, since the reinforcing plate is provided between the inner wall of the column in the width direction and the second roller abutting in the width direction, the column in the width direction of the column is It becomes possible to prevent the deformation more reliably. Moreover, since the reinforcing plate is made of a harder material than the support, it is possible to reduce the rolling friction of the second roller.

It is a perspective view which shows the use condition of the reversing device which concerns on the 1st Embodiment of this invention. It is the whole perspective view which looked at one side of a pair of reversing devices of Drawing 1 from the front side. It is the whole perspective view which looked at the reversing device of Drawing 2 from the back side. FIG. 3 is an enlarged view of a rotation drive unit showing a rotation operation of the reversing device of FIG. 2. FIG. 3 is an enlarged view of a rotation drive unit showing an interval adjusting operation of the reversing device of FIG. 2. FIG. 3 is a front view of the reversing device of FIG. 2. It is an expanded sectional view which shows the screw mechanism of the raising/lowering drive part of the reversing apparatus of FIG. 2, (a) is a state with a holding part in a raising position, (b) is a state with a cement panel mounted, (c) is cement. It is a figure which shows the state which the holding|maintenance part fell below the mounting position of a panel. It is a front view of the holding|maintenance part of the reversing apparatus of FIG. It is the whole front side perspective view of the reversing device concerning a 2nd embodiment of the present invention. FIG. 10 is an overall perspective view of the reverse side of the reversing device of FIG. 9. The right side view of the reversing device of FIG. 9 is shown, (a) is a general view, (b) is a partial enlarged view of the arm base end side. It is a schematic diagram which shows the cross section cut|disconnected by the AA line of FIG. The front view of the reversing device of FIG. 9 is shown, (a) is a general view, (b) is a partial enlarged view of the arm periphery. The top view of the reversing device of FIG. 9 is shown, (a) is a general view, (b) is a partial enlarged view of the arm base end side. It is the figure which showed the sorting device of the conventional molded panel.

Hereinafter, the reversing device according to the embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing a usage state of the reversing device 1 according to the first embodiment of the present invention. As shown in FIG. 1, the reversing devices 1 are used in pairs. FIG. 1 shows a pair of mirror-symmetrical reversing devices 1 arranged so as to be sandwiched from the longitudinal direction of a cement panel 100 which is a plate-like building material. A through hole 100a is formed in the cement panel 100 in the longitudinal direction, and each fork 2b of the reversing device 1 described later is in a state of being inserted into the through hole 100a.

Metal fittings are attached to the back surface or both surfaces of the cement panel 100 used for the outer wall of a building or the like as a preliminary work for installation. And in order to attach this metal fitting, you have to invert the cement panel 100 one by one. Next, the schematic configuration of the reversing device 1 will be described with reference to FIGS.

2 is an overall perspective view of the reversing device 1 of the present invention as seen from the front side, and FIG. 3 is an overall perspective view as seen from the back side. The reversing device 1 of the present invention is a pair of devices used as a set of two devices, but for convenience of description, FIGS. 2 and 3 show only one configuration as an example. Specifically, it shows a configuration arranged on the left side in a forward direction (see FIG. 1) by a drive wheel 8a (FIG. 3) described later. The configuration arranged on the right side is at least mirror-symmetrical to the configuration shown in FIG. 2 by using electrical components.

With reference to FIG. 2, two pieces of the structure of the holding part 2 for holding the hollow plate-shaped building material in which the through hole 100a is formed, such as the cement panel 100 shown in the above description of the usage state, are provided. The forks 2b are arranged in parallel.

The holding unit 2 is composed of a slider 2a and a fork 2b, and is attached to a rotation drive unit 4 in which a rotary shaft 4a is arranged parallel to the extending direction of the fork 2b. The rotation drive unit 4 includes a motor (not shown) in a rectangular parallelepiped case. The cement panel 100 held by these forks 2b is inverted by the rotation drive of the rotation drive unit 4, as will be described later. The rotation drive unit 4 is attached to the lift drive unit 6.

The holding unit 2, the rotation driving unit 4, and the elevating and lowering driving unit 6 are installed on the carriage 8, and the entire reversing device 1 is configured to be movable.

The elevating/lowering drive unit 6 is provided in parallel with the screw pillar 6a that is installed upright on the carriage 8, the motor 6b that is attached to the upper end of the screw pillar 6a, and that serves as a drive unit that rotates the screw pillar 6a about its axis, and the screw pillar 6a. It is composed of the installed pillars 6c. The rotation drive unit 4 is provided on the tip side of the arm 6d that extends substantially horizontally forward. At the base end side of the arm 6d, a nut that is screwed into the screw column 6d of the elevating and lowering drive unit 6 and constitutes a feed screw is provided. The structure of the feed screw will be described later in detail with reference to FIG. As described above, the rotation drive unit 4 can be controlled to move up and down by rotating the screw column 6a of the lift drive unit 6 by the motor 6b.

Drive wheels 8a (FIG. 3) are provided at the rear of the carriage 8 and driven wheels 8b are provided at the front thereof. However, the drive wheel 8a is not limited to such a configuration, and the drive wheel 8a may be provided at the front or intermediate position.

The driven wheels 8b are arranged side by side in the width direction in front of the bogie 8, and their traveling directions are orthogonal to the extending direction of the forks 2b. On the other hand, the drive wheels 8a are arranged in the width direction in a biased manner to the same side where the holding portion 2 is provided, and the driving steering wheel 8d (FIG. 3) is provided so that the traveling direction can be changed. It is provided integrally. Further, a free wheel 8c capable of traveling in all directions is provided on the side slightly ahead of the drive wheel 8a and on the side opposite to the drive wheel 8a in the width direction. When the traveling steering handle 8d is provided with a mechanism for locking in a specific direction, traveling is stabilized. For example, if a locking mechanism that locks in the straight-ahead direction is provided, it is possible to stably move the plate-shaped building material in parallel while holding it.

Referring to FIG. 3, on the carriage 8, a battery 20 for driving the rotation drive unit 4, the lifting drive unit 6 (FIG. 2) and the drive wheels 8a, and a control panel 21 for controlling these are also provided. It has been placed. Further, the control panel 21 is provided with a receiver 22 that receives control signals for rotation control, elevation control, and drive traveling control. As a result, in addition to being able to be directly controlled, it is also possible to perform remote operation using the wireless transmitter 18, as shown in FIG.

Here, referring again to FIG. 1, in order to insert the fork 2b into the through hole 100a of the cement panel 100 as shown in FIG. 1, first, the reversing device is provided near each end of the cement panel 100 in the longitudinal direction. Place 1 At this time, it is possible to reduce the burden on the worker due to the driving traveling by the driving wheels 8a. Specifically, the traveling steering handle 8d of the drive wheel 8a is unlocked, and while driving the steering wheel, the steering wheel 8d is moved toward the end of the cement panel 100 by driving to adjust the position of the fork 2b to the position of the through hole 100a.

Returning to FIG. 2, a retracting mechanism is used for the fork 2b of the holding unit 2 of the reversing device 1 according to this embodiment. In FIG. 2, the contracted arrangement of the forks 2b is shown by overlapping with a dotted line. In this way, when the fork 2b is contracted to the cement panel 100 and the fork 2b is extended after the positioning, the fork 2b can be inserted more easily than inserting the entire reversing device 1 while moving. Is.

Next, the rotation drive mechanism will be described with reference to FIGS.

FIG. 4 is an enlarged perspective view of the periphery of the rotation driving unit 4 of the reversing device 1 of FIG. 2, and shows that the holding unit 2 including the forks 2b is rotating. A state in which the two forks 2b maintain the same height is shown by a solid line, and a state in which they are slightly rotated is shown by overlapping with a dotted line.

As shown in FIG. 4, the forks 2b of the holding unit 2 are arranged at positions equidistant from the rotary shaft 4a of the rotary drive unit 4. As a result, when the center position of the cement panel in the lateral direction is aligned with the center of rotation, it becomes possible to perform the reversing operation with good balance.

FIG. 5 is an enlarged perspective view of the periphery of the rotation drive unit 4 of the reversing device 1 similarly to FIG. 4, but here, a space adjusting mechanism for adjusting the space between the forks 2b is shown. The state in which the intervals are widened is shown by overlapping with a dotted line.

The fork 2b of the holding unit 2 according to the present embodiment is attached to the slider 2a, and the slider 2a is arranged in a pair of screws by one screw shaft 2c. However, the screw threads of the screw shaft 2c with which the respective sliders 2a are screwed are threaded so that they are mutually opposite threads. Thus, by rotating the input portion 2ca at the end of the screw shaft 2c, the sliders 2a can be spaced apart from or close to each other about the position of the rotation shaft 4a, and the spacing between the forks 2b can be adjusted. Therefore, the center of the through hole 100a (see FIG. 1) of the cement panel 100 can be adjusted, and then the interval between the forks 2b can be finely adjusted, which eliminates the need to move the reversing device 1 as a whole and improves work efficiency. .. Further, when the fork 2b is inserted into the through hole 100a and the gap adjusting mechanism including the slider 2a and the screw shaft 2c is used to hold the inner wall of the through hole 100a in a pressure contact state in a widening direction or a narrowing direction, a reversing operation is performed. It is possible to stabilize without rattling.

In the present embodiment, a knob is provided as an input unit 2ca at the end of the screw shaft 2c, and if an input unit that can be used manually is provided, work efficiency is improved.

Subsequently, the lifting mechanism will be described with reference to FIG.

The motor 6b is provided on the upper end of a column 6c that stands upright in parallel with the screw column 6a. The screw pillar 6a has a structure in which the rotation of the motor 6b is transmitted by a bevel gear (not shown) provided at the upper end.

The above-described rotation drive unit 4 is arranged in a sliding pair with respect to the support column c, and a feed screw mechanism is configured for the screw column 6a.

Accordingly, by controlling the rotation of the motor 6b, it becomes possible to drive the rotation drive unit 4 up and down along the support column 6c.

Next, this feed screw mechanism will be described in detail with reference to FIG.

FIG. 7 shows a cross-sectional view of the feed screw mechanism configured for the screw post 6a. It should be noted that, for convenience of description, a detailed configuration is schematically illustrated by omitting illustration. The position of the apex of the triangle indicated by the alternate long and short dash line in the figure represents the position of the upper surface of the mountain on which the plate-shaped building material such as a cement panel is placed. That is, the alternate long and short dash line indicates the lower limit position of the work. A nut 6e of a feed screw is screwed into the screw post 6a. The nut 6e is slidably disposed so as to penetrate a locking portion 6f provided in the arm 6d (see FIG. 2) of the elevating and lowering drive unit 6. The pressure receiving plate 6g that is in contact with the lower portion of the locking portion 6f receives a load applied via the locking portion 6f. Since the nut 6e is formed with the flange that engages with the pressure receiving plate 6g, it is possible to lift the pressure receiving plate 6g and the locking portion 6f via the nut 6e.

FIG. 7A schematically shows a state in which the locking portion 6f is lifted higher than the mounted height of the work target member. (B) schematically shows a state in which the work target member is grounded at the mounting position. (C) shows a state in which the nut 6e is lowered further than the state in which the work target member is grounded at the mounting position.

As shown in FIG. 7, the nut 6e is configured to be slidable within the length L with respect to the locking portion 6f. As a result, as shown in FIG. 7( c ), the length of the cement panel 100 held is further lowered below the position of the nut 6 e in the state where the held cement panel 100 is in contact with the upper surface position of the mount of another cement panel 100. It is possible to descend by the amount of L. That is, it is possible to safely lower the fork 2b to a position where the load completely disappears without damaging the work target such as the plate-shaped building material.

As described above, in the present embodiment, a margin is provided in the operation range by the length L further below the lower contact position of the fork 2b with respect to the work target, so that the operation is a rough operation visually observed by the operator. Also, it is possible to perform work safely without damaging the building material to be worked. Therefore, a configuration for performing control using a pressure sensor that detects a load and a distance measuring sensor that measures a distance from the mounting surface is not necessary, and cost and weight can be significantly reduced. In particular, at a work site, it is very advantageous not only in work efficiency but also in carrying-in cost to be able to carry in the device by using an elevator, so that the structure capable of reducing the weight has many merits.

Next, the shape of the fork 2b will be described. FIG. 8 is a front view of the holding portion 2 as seen in the direction in which the screw shaft 2c extends. FIG. 8A shows a positional relationship before and after the fork 2b expands and contracts with respect to the slider 2a. The extended state is represented by a solid line, and the contracted state (retracted state) is represented by a dotted line. The tip end side of the fork 2b according to the present embodiment is formed so that the diameter is slightly larger than the base end side on the entire circumference. This step is used as a stopper that defines the rear limit when retracting.

FIG. 8B shows a state in which a load is applied from the cement panel 100 to the fork 2b in the extended state. When a large force is applied to the fork 2b, it may bend slightly downward. However, as described above, a step is formed at the tip of the fork 2b so as to be slightly larger. As a result, even if the bending occurs, if the bending amount is small, the cement panel 100 is supported only by the tip end side of the fork 2b without contacting the cement panel 100 on the base end side. Therefore, the structure is such that a load is less likely to be generated on the end portion where damage such as chipping is likely to occur. Even if the proximal end side of the fork 2b and the cement panel 100 are bent to the extent that they are in contact with each other, most of the load can be received by the distal end side of the fork 2b, so that the cement panel 100 is not damaged. Is not likely to occur.

Further, even when the contact position with the cement panel 100 is moved from the side surface of the fork 2b to the bottom surface side by the reversing operation, since the step on the tip side is formed over the entire circumference, the cement panel is similarly formed. The edges of 100 are protected.

The reversing device 1 described above is configured to be independently battery driven. Further, the receiver 22 is individually provided. The reversing device 1 according to the present embodiment does not include a complicated feedback control means for detecting the mutual operation states and restricting the movement of each other. Instead, each receiver 22 is set to the same channel, the same control signal is transmitted from one wireless transmitter 18, and the same operation is performed at the same time, thereby enabling synchronized and integrated work. There is. The term "same channel" as used herein means the same frequency or frequency band used in wireless communication, or the same address when communication is performed in packets.

Therefore, a drive circuit and a communication means between individuals which compose a complicated servo mechanism are not required, and the weight and the cost can be significantly reduced.

Further, a characteristic configuration is that the electric motors (motors 4b and 6b) used for the rotational drive and the vertical drive are not provided with a control mechanism for keeping the rotational speed constant. Therefore, at least one of the motor 4b of the rotation drive unit 4 and the motor 6b of the elevation drive unit 6 is positively used with the characteristic that the rotation speed decreases as the load increases. Next, this mechanism will be described.

As shown in FIG. 2, the fork 2b of the holding unit 2 of the reversing device 1 according to the present embodiment is provided below the rotation shaft 4a of the rotation drive unit 4. For this reason, it is possible to lift the cement panel 100 at a low position without significantly lowering the arm 6d of the lifting drive unit 6. When the cement panel 100 lifted in this way is reversed, since the two forks 2b are both separated downward from the rotation shaft 4a, the rotation torque gradually increases in the rotation range of 0 to 90 degrees. It becomes maximum at the position of degree.

If the motor 4b of the rotation drive unit 4 has a characteristic that the rotation speed decreases with an increase in load, the rotation speed gradually decreases as the rotation torque increases in the rotation range of 0 to 90 degrees. To do.

Here, in the initial state, when the phases of the respective reversing devices 1 are deviated, or when the voltage difference is caused by the difference in the charged amount of the battery 20, the rotation speeds of the motors 4b are completely matched. However, there is a possibility that a slight synchronization deviation will occur. In this case, the lifting force in the rotation range of 0 to 90 degrees becomes uneven, and the load on the preceding fork 2b becomes large. However, since the rotation speed greatly decreases as the load increases, the rotation speed is significantly reduced on the leading side. That is, in the reversing device 1 according to the present embodiment, the operation of the larger load can be suppressed without using a complicated feedback control circuit, so that the subsequent side can be automatically synchronized. Becomes

The above action becomes more remarkable as the fork 2b is separated from the rotary shaft 4a. Therefore, when the distance between the two is set in consideration of the relationship between the drive capacity of the motors 4b and 6b and the weight of the cement panel 100 to be handled, the synchronization deviation is greatly eased in the initial stage of the reversing operation of 0 to 90 degrees, It is possible to stabilize the subsequent inversion operation.

The same applies to the lifting drive unit 6. A larger load is applied to the side that performs the lifting operation in advance than that in the subsequent side, and accordingly, the decrease in the rotation speed increases. Therefore, the movement on the leading side is suppressed, and the synchronization is automatically achieved in the ascending operation.

As described above, according to the reversing device 1 of the present invention, with respect to the slight synchronization deviation caused by the visual adjustment by the operator, the characteristic that the rotation speed changes with the load of the electric motors 4b and 6b is used. Since it works so as to be automatically relaxed, it is possible to prevent damage to the cement panel 100 and operate it safely without using a complicated servo mechanism.

As a result, the device can be downsized, and can be easily moved using an elevator or the like for material transportation on site.

Further, even if the initial setting is performed relatively roughly, the operations are performed so that the apparatuses are automatically synchronized with each other, so that the operation does not require skill.

(Second embodiment)
FIG. 9 is an overall front perspective view of the reversing device 51 according to the second embodiment of the present invention. Further, FIG. 10 is an overall perspective view of the reverse side of the reversing device 51. The schematic configuration of the reversing device 51 will be described with reference to FIGS. 9 and 10 as appropriate.

Similar to the reversing device 1 according to the first embodiment, two reversing devices 51 shown in FIGS. 9 and 10 are also used in a set. Hereinafter, the inner side shown in the drawings is the inner side in the work space configured by a pair of two reversing devices 51, and in the case of explaining the inner side (center side) of a single reversing device 51, “the device "We will call it the inside and distinguish it. In addition, the side on which the plate-shaped building material that is the work target is held or inverted is defined as the front side, and the side on which the drive wheels and the traveling steering handle, which will be described later, are provided is defined as the rear side. For convenience of explanation, only one of the pair of configurations is shown here as an example, as in the first embodiment. Specifically, it shows a configuration arranged on the left side toward the front. In the configuration arranged on the right side, at least the portion excluding the electrical components is configured in mirror symmetry with respect to the configurations shown in FIGS. 9 and 10.

The holding portion 52 that directly lifts a plate-like building material such as a cement panel has almost the same configuration as that of the reversing device 1 of the first embodiment. Specifically, the holding portion 52 has two forks 52b extending in parallel toward the inside, and a slider 52a for adjusting the distance between them. The two sliders 52a are respectively arranged in a feed screw structure with respect to portions of the screw shaft 52c that are oppositely threaded. Thus, the two sliders 52a can be slid simultaneously by rotating one of the input parts 52ca provided at the end of the screw shaft 52c.

Further, the holding portion 52 is provided with four guide rollers 52d on the side where the forks 52b are provided in the width direction of the reversing device 51. These guide rollers 52d are not provided in the reversing device 1 according to the first embodiment. The fork 52b can be retracted to the outside like the reversing device 1 of FIG. In this retracted state, the guide roller 52d is used as a guide to press the end of the cement panel against the width of the reversing device 51 so that the fork 52b can be aligned safely and easily without cutting the end of the cement panel. It is possible.

Such a holding portion 52 is attached to the rotation driving portion 54. The fork 52b of the holding portion 52 is arranged parallel to the rotation shaft 54a of the rotation driving portion 54. Further, the fork 52b is provided at a position lower than the rotating shaft 54a. The rotary drive unit 54 includes a motor 54b in a rectangular parallelepiped case. The cement panel held by these forks 52b is reversed by the rotational drive of the rotary drive unit 54, as in the reversing device 1 of FIG. The rotation drive unit 54 is attached to the lift drive unit 56.

The holding unit 52, the rotation drive unit 54, and the elevating drive unit 56 are installed on the carriage 58, and the entire reversing device 51 is configured to be movable, which is similar to the reversing device 1 in FIG. ..

The elevating/lowering drive unit 56 surrounds the screw pillar 56a that is erected on the carriage 58, the motor 56b that is provided at the upper end of the screw pillar 56a, and that serves as a drive unit that rotates the screw pillar 56a, and the screw pillar 56a. It is composed of upright columns 56c. The rotation drive unit 54 is provided on the tip side of the arm 56d that extends substantially horizontally forward. At the base end side of the arm 56d, a nut that is screwed into the screw column 56a of the elevating and lowering drive unit 56 and forms a feed screw is provided. In this way, the rotation drive unit 54 can be controlled to move up and down by rotating the screw column 56a of the lift drive unit 56 by the motor 56b.

Next, the carriage 58 will be described. Similar to the dolly 8 of the reversing device 1 in FIG. 1, the dolly 58 also has driven wheels 58b arranged side by side in the width direction. However, in the cart 58, the inner side of the two leg portions 58c to which the driven wheels 58b are attached is strengthened rather than the outer side. In this way, the configuration in which the legs 58c of the carriage 58 are asymmetrical is different from the reversing device 1 in FIG. Specifically, the inner leg portion 58 is reinforced by a brace portion 58e extending from the rear outer side to the front inner side. Further, only one drive wheel 58a is provided at the rear in the approximate center in the width direction. The drive wheel 58a can be turned by a traveling steering handle 58d extending obliquely upward and rearward.

A battery 70 for driving the rotation drive unit 54, the elevation drive unit 56, and the drive wheels 58a, and a control panel 71 for controlling these are mounted behind the carriage 58 (see FIG. 10). .. The control panel 71 is provided with receiving means for receiving control signals for rotation control, elevation control, and drive traveling control. As a result, in addition to being able to be directly controlled, it is also possible to perform remote operation by wireless transmission, as in the reversing device 1 of FIG.

The rotary drive mechanism has basically the same configuration as that of the reversing device 1 in FIG. 1, and thus the description thereof is omitted here.

The elevating mechanism will be described with reference to FIGS. 9 and 10.

As described above, the motor 56b is provided at the upper end of the support column 56c that is erected in parallel with the screw column 56a. The screw column 56a has a structure in which the rotation of the motor 56b is transmitted by a bevel gear (not shown) provided at the upper end. In such a configuration, by controlling the rotation of the motor 56b, it becomes possible to drive the rotation drive unit 54 up and down along the support column 56c. Such a basic mechanism is the same as that of the reversing device 1 in FIG. However, in the configuration according to the present embodiment, the structure of the support column 56c that bears the load is greatly different. The column 6c of the reversing device 1 shown in FIG. 1 was composed of two prismatic members that were erected on both sides of the screw column 56a. On the other hand, the column 56c of the reversing device 51 is configured by combining channel steels.

The lead screw mechanism described with reference to FIG. 7 in the first embodiment also includes the reversing device 52 according to the present embodiment.

Next, the configuration of the support column 56c and its surroundings will be described with reference to FIGS.

11 is a left side view of the reversing device 51 of FIG. 9, FIG. 11(a) is an overall view, and FIG. 11(b) is a partially enlarged view of the arm 56d on the proximal end side.

First, FIG. 11A is referred to. When the cement panel is lifted by the fork 52b of the holding portion 52, a force F that tilts the front of the arm 56d downward is exerted, as indicated by the downward arrow. In order to reduce an unnecessary load in the screw column 56a (see FIG. 9) due to such a force F other than the axial direction, a sliding contact portion 57 that slides along the inner wall of the column 56c is provided. The sliding contact portion 57 is shown by a dotted line. In the present embodiment, two pairs of sliding contact portions 57 are provided above and below along the pillar 56c.

Here, in order to help understanding of the positional relationship between the sliding contact portion 57 and the column 56c, refer to FIG. 12 showing a cross section taken along line AA of FIG. 11A.

In FIG. 12, the structure of the support column 56c and the sliding contact portion 57 is mainly focused on, and for convenience of description, the internal structure of the control panel 71 and other peripheral structures are omitted and illustrated schematically. Actually, the wiring of the drive system such as the rotation driving unit 54 is housed inside the rear cover 59, but these wirings are not shown because they are not necessary for explaining the skeleton structure. ..

As shown in FIG. 12, the column 56c is composed of two channel steels 60 arranged so that the groove sides face each other. The edges of the channel steels 60 are all bent rearward. Specifically, the edge of the front plate portion 60a of the channel steel 60 is formed as a bent portion 60d, and the edge of the rear plate portion 60b is formed as a bent portion 60e.

The sliding contact portion 57 includes a front-rear direction roller 57a (first roller) arranged in contact with the front plate portion 60a or the rear plate portion 60b of the channel steel 60, and a width direction roller 57b arranged in contact with the side plate portion 60c. (Second roller). In the width direction, a reinforcing plate 61 for improving the lateral strength of the channel steel 60 is provided between the side plate portion 60c and the width direction roller 57b. It is desirable to use a member having a hardness higher than that of the channel steel 60 for the reinforcing plate 61. For example, if the reinforcing plate 61 is made of carbon steel, it is smaller than the front-rear direction roller 57a, so that sufficient strength can be obtained even for the width-direction roller 57b where pressure is likely to concentrate.

In general, one side of a channel steel is open, so that it is inferior in strength to pipe materials and square bars. In the reversing device 51 according to the present embodiment, since the groove sides of the channel steel 60 are used so as to face each other in the width direction, it is necessary to reinforce the strength in the front-rear direction. On the other hand, since the channel steel 60 according to the present embodiment has the bent portions 60d and 60e as described above, it is possible to obtain sufficient strength in the front-rear direction.

Further, by utilizing the fact that the channel steel 60 is open to one side, the sliding contact portion 57 for stabilizing the elevating mechanism can be arranged in the support column 56c, so that an extremely compact design can be achieved. There is.

Here, returning to FIG. 11 again, refer to FIG. 11B in which the base end side of the arm 56d provided with the sliding contact portion 57 is enlarged.

In the reversing device 51 according to the present embodiment, the front-rear direction roller 57a of the sliding contact portion 57 arranged on the upper side is arranged so as to abut the front plate portion 60a of the channel steel 60, and the rear and rear plate portions 60b are arranged. There is a slight gap between them. On the other hand, the front-rear direction roller 57a of the sliding contact portion 57 arranged on the lower side is arranged so as to contact the rear plate portion 60b of the channel steel 60, and a slight gap is formed between the front and the front plate portion 60a. Is provided. As a result, even if the downward force F as shown in FIG. 11A acts on the arm 56d, the load can be stably received by the support column 56c, and the rotational load generated on the screw column 56a is reduced. be able to.

Next, the relationship between the column 56c and the sliding contact portion 57 will be described by changing the viewpoint in the front-back direction. 13 is a front view of the reversing device 51 of FIG. 9, FIG. 13(a) is an overall view, and FIG. 13(b) is an enlarged view of the periphery of the arm 56d.

Here, the cement panel 100 that is the work target is represented by a dotted line. FIG. 13A shows a state in which one cement panel 100 is lifted from the top of a pile on which a plurality of cement panels 100 are mounted. Since the cement panel 100 used for the outer wall of a building weighs several hundred kilograms, even if two cement panels 100 are lifted as a set, a considerable load is applied to one of them.

Reference is made to FIG. 13B in which the periphery of the arm 56d is enlarged. The sliding contact portion 57 is shown by a dotted line. As described above, the sliding contact portion 57 is provided with the width direction roller 57b that comes into contact with the reinforcing plate 61 filled on the inner wall of the side plate portion 60c of the support column 56c. Accordingly, when a load is applied to the fork 52b of the holding portion 52 provided toward the inner side, the width direction roller 57b of the upper sliding contact portion 57 is pressed against the reinforcing plate 61 on the width direction inner side with respect to the column 56c. .. On the other hand, the width direction roller 57b of the lower sliding contact portion 57 is pressed against the outer reinforcing plate 61. In this way, the reaction force can be stably received by the column 56c even in the width direction.

Next, the configuration around the column 56c will be described in plan view. FIG. 14 is a plan view of the reversing device 51 of FIG. 9, FIG. 14( a) is an overall view, and FIG. 14( b) is a partially enlarged view of the base end side of the arm 56 d. Similar to FIG. 13, the cement panel 100 is represented by a dotted line.

With reference to FIG. 14A, it can be seen that the plate-shaped outer reinforcing ribs 62 are formed around the columns 56c. In FIG. 14B, the outer reinforcing ribs 62 are shown by hatching for convenience, so that the shape can be easily discriminated. The outer reinforcing ribs 62 are formed so as to connect to the column 56c in three directions except the front. As a result, even when a strong pressure is applied to the inner wall of the pillar 56c from the front-rear direction roller 57a and the width direction roller 57b of the sliding contact portion 57, it is possible to prevent the pillar 56c from being deformed due to expansion.

Further, the outer reinforcing ribs 62 integrally form the pair of left and right channel steels 60, so that the rigidity of the entire column 56c is also improved.

The outer reinforcing ribs 62 may be provided at least in the intermediate region of the pillar 56c through which the sliding contact portion 57 passes. In the present embodiment, as shown in FIG. 13, a small space between the battery 70 and the control panel 71 is used for arrangement.

As described above, in the reversing device 51 according to the present embodiment, the column 56c is compactly provided in the width direction of the device while ensuring sufficient strength. As a result, as can be seen from FIGS. 13 and 14, the space on the inner side of the column 56c, that is, on the side where the fork 52b is provided can be widely utilized. Therefore, even when the cement panel 100 is moved forward in a lifted state, it does not interfere with the remaining ridges of the cement panel 100, and thus the degree of freedom in work is increased.

At the same time, by designing the column 56c compactly, the space on the side where the fork 52b is not provided can be widely utilized. That is, the degree of freedom in design is high when a heavy object (for example, the battery 70, the control panel 71, etc.) is arranged as a counterweight on the side opposite to the holding portion 52 via the support column 56c in the width direction and the front-rear direction. As a result, the overall balance around the column 56c becomes good, and the reversing device 51 is stabilized.

Furthermore, since the end edge of the rear plate portion 60b is bent rearward as the bent portion 60e, the channel steel 60 forming the support column 56c has a rear structure (for example, a frame integrally formed with the carriage 58, etc.). ) Is easy to install. When the column 56c is connected to the rear structure in this manner, the column 56c can be prevented from tilting forward and can be stabilized.

The configuration described above is an embodiment of the present invention and includes the following modifications.

In the above-described first and second embodiments, the configuration in which the two forks 2b and 52b are provided in the holding portions 2 and 52 is shown as an example, but the present invention is not limited to this, and three or more configurations are also included. .. However, in the case of three or more, the same effect can be obtained as long as the two forks arranged on both outer sides satisfy the same conditions as the forks 2b and 52b described above.

Further, in the above-described first and second embodiments, the configuration in which the batteries 20 and 70 are used as the power source has been described as an example, but a configuration using a commercial power source may be used.

Further, in the first embodiment described above, at least one of the rotation drive unit 4 and the elevation drive unit 6 is an electric motor (motors 4b, 6b) having a characteristic that the rotation speed decreases as the load increases. Although this is shown as an example, specifically, a DC motor that does not include a constant rotation feedback control circuit is preferable. In particular, a DC brushless motor is suitable when it is provided with a drive circuit that prevents complete lock and prevents an excessive current from flowing in a stopped state.

Further, the electric motor whose rotation speed decreases as the load increases includes a motor provided with an electromagnetic clutch. Specifically, a structure in which a powder clutch, a hysteresis clutch, or the like is interposed in the power transmission path for power absorption or torque limiter may be mentioned. When the electric motor having such a configuration is used, an appropriate slip occurs in the powder clutch or the like even when the movement of the work target side (clutch output side) is completely stopped due to overload. Therefore, the electric mechanism side (the input side of the clutch) can maintain a constant rotation speed. Therefore, an overcurrent is not generated to maintain the rotation speed, and the load on the battery can be reduced. Further, even if the stop side is started when the two reversing devices 1 are detuned as described above after they are retuned, the structure such as the powder clutch acts as a buffer mechanism, which is unnecessary. It is possible to drive safely without causing recoil. Such a configuration can be directly applied to the reversing device 51 according to the second embodiment.

Further, in the above-described first embodiment, the configuration in which the drive wheel 8a is one wheel rearward is shown as an example, but a plurality of drive wheels may be provided if there is enough power. Further, it is not necessary to dispose in one direction in the width direction.

In addition, in the above-described second embodiment, the configuration in which the front-back direction roller 57a and the width direction roller 57b are combined is shown as an example of the sliding contact portion 57. However, a slide contact member other than the roller may be used as long as it can receive the load applied from the arm 56d of the lifting drive unit 56 and does not hinder the lifting motion. For example, a wear-resistant polymer material may be used. Also, a combination of such a polymer material and a roller may be used.

The reversing device of the present invention does not involve a precise tuning mechanism and can therefore be designed compact. This makes it possible to use an elevator for materials and the like, which is useful at a construction site in a small space. Further, the present invention is not limited to a plate-like building material such as a cement panel, and can be used as a device for safely elevating or reversing a long building material.

1 Reversing device 2 Holding part 2a Slider (space adjustment mechanism)
2b Fork 2c Screw shaft (space adjustment mechanism)
2ca input unit 4 rotation drive unit 4a rotation shaft 4b motor 6 lifting drive unit 6a screw post (feed screw mechanism)
6b Motor 6c Support 6d Arm 6e Nut (Feed screw mechanism)
6f Locking part 6g Pressure receiving plate 8 Cart 8a Drive wheel 8b Driven wheel 8c Free wheel 8d Traveling steering wheel 18 Wireless transmitter (transmitting means)
20 battery 21 control panel 22 receiver (reception means)
51 Reversing device 52 Holding part 52a Slider (spacing adjustment mechanism)
52b Fork 52c Screw shaft (space adjustment mechanism)
52ca Input part 52d Guide roller 54 Rotation drive part 54a Rotation shaft 54b Motor 56 Lifting drive part 56a Screw column (Feed screw mechanism)
56b Motor 56c Strut 56d Arm 57 Sliding contact portion 57a Front-rear direction roller (first roller)
57b Width direction roller (second roller)
58 dolly 58a drive wheel 58b driven wheel 58c leg portion 58d traveling steering handle 58e bracing portion 59 rear cover 60 channel steel 60a front plate portion 60b rear plate portion 60c side plate portion 60d, 60e bent portion 61 reinforcing plate 62 outer reinforcing rib 70 battery 71 Control panel 100 Cement panel (plate building material)
100a Through hole 101 Sorting device 102 Frame 102a Vertical frame 102b Horizontal frame 103 Wheel 104 Universal wheel 105 Elevating pedestal 106 Clamping means 107 Arm 108 Panel stopper 109 Clamping member 110 Wire 111 Winch F Force L length

Claims (9)

Hollow plate-shaped building material in which a plurality of through holes are formed in parallel, can be held and inverted so as to be sandwiched in the extending direction of the through holes, a pair of reversing device,
A holding portion in which at least two forks that can be inserted into the through holes are arranged in parallel;
A rotation drive unit that has a rotation shaft arranged in parallel with the extending direction of the fork and above the fork, and rotationally drives the holding unit,
An elevating and lowering drive unit for elevating and lowering the rotation drive unit,
And a reversing device. The reversing device according to claim 1, wherein the tip end side of the fork is formed to have a larger diameter over the entire circumference than the base end side. 3. The reversing device according to claim 1, wherein at least one of the rotation drive unit and the elevating drive unit is driven by an electric motor having a characteristic that the rotation speed decreases as the load increases. Each of the paired configurations is provided with receiving means for receiving respective control signals of the rotation control of the rotation drive unit and the elevation control of the elevation drive unit,
4. The reversing device according to claim 1, wherein each of the receiving means is set to the same channel. The reversing device according to any one of claims 1 to 4, wherein the holding portion includes an extension/contraction mechanism capable of extending/contracting the fork. The elevating and lowering drive unit is provided with a column in which two channel steels are arranged so that their groove sides face each other in the width direction, and two end edges of each are bent backward. The reversing device according to claim 1. The rotation drive unit has a first roller that is in contact with the inner wall of the column in the front-rear direction and can roll up and down, and a second roller that is in contact with the width direction and can roll up and down. The inversion device according to claim 6, further comprising a contact portion. The reversing device according to claim 7, wherein a reinforcing rib that extends outward from at least the rear and the width direction is formed in an intermediate region in the vertical direction of the pillar. The reversing device according to claim 7 or 8, wherein a reinforcing plate that is harder than the support is interposed between the inner wall of the support in the width direction and the second roller.

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