Building material lifting device

Abstract

To provide a building material lifter capable of reducing work interruption time.SOLUTION: The building material lifter includes: a base member 10 capable of being placed on any mounting surface F; a movable member 20 engaged in a movable manner in the vertical direction with respect with the base member 10; and a lifting mechanism 30 that raises and lowers the movable member 20. The movable member 20 integrally includes: a building material bottom receiving part A that protrudes in one direction along a placement surface F to receive the bottom of a building material X placed thereon; and a building material upright surface support part B that is close to or in contact with a vertical face x1 of the building material X above the building material bottom receiving part A. The lifting mechanism 30 includes: an electric motor 33 as a power source; and a battery 34 that supplies electric power to the electric motor 33. The battery 34 is detachably provided at a part other than the building material bottom receiving part A and the building material upright surface support part B.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a construction material lifting device for lifting and lowering construction materials. [Background technology]

[0002] Conventionally, this type of invention includes a door hanging jig that includes a support part that is placed on a floor surface or the like, a rod-shaped main body that is supported by the support part so that it can swing freely, and one end of the main body serves as a pedal part and the other end serves as a bearing part, as described in Patent Document 1, for example. According to this conventional technique, by placing a door on the support and stepping on the pedal, the door can be raised using the principle of leverage, which is useful for door hanging operations, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 7-23718 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, the height position of the building material is likely to vary depending on the amount and force with which the pedal portion is depressed. Therefore, for example, a structure is required in which a battery power source is provided and the door or the like is raised and lowered using the power from this battery power source. However, some ingenuity is required to avoid long interruptions in work while charging the battery power source. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration. In a building material lifting device including a base member that can be placed on any surface to be placed, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that lifts and lowers the movable member, the movable member integrally includes a building material underside receiving part that projects in one direction along the surface to be placed and receives the underside of the building material to be placed, and a building material upright surface supporting part that is in contact with or close to the upright surface of the building material above the building material underside receiving part, the lifting mechanism includes an electric motor as a power source, and a battery that supplies power to the electric motor, and the battery is detachably provided in a portion other than the building material underside receiving part and the building material upright surface supporting part. The battery is provided near the upper end of the movable member so as to be removable from above. A building material lifting device characterized in that The present invention also has the following configuration. A building material lifting device comprising a base member that can be placed on any mounting surface, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface and receives the underside of the building material to be placed thereon, and a building material upright surface support portion above the building material underside receiving portion and in contact with or close to the upright surface of the building material, the lifting mechanism comprises an electric motor as a power source, and a battery that supplies power to the electric motor, the battery being detachably provided in a part other than the building material underside receiving portion and the building material upright surface support portion, and a display portion that displays information including the remaining charge of the battery is provided at the upper end of the movable member. The present invention also has the following configuration. A building material lifting device comprising a base member that can be placed on any mounting surface, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface and receives the underside of the building material to be placed thereon, and a building material upright surface support portion that is above the building material underside receiving portion and in contact with or close to the upright surface of the building material, the lifting mechanism comprises an electric motor as a power source, and a battery that supplies power to the electric motor, the battery being detachably provided in a part other than the building material underside receiving portion and the building material upright surface support portion, and the building material upright surface support portion is provided with an suction device for suctioning the building material. The present invention also has the following configuration. A building material lifting device comprising a base member that can be placed on any mounting surface, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface and receives the underside of the building material to be placed thereon, and a building material upright surface support portion that is above the building material underside receiving portion and in contact with or close to the upright surface of the building material, the lifting mechanism comprises an electric motor as a power source, and a battery that supplies power to the electric motor, the battery being detachably attached to a part other than the building material underside receiving portion and the building material upright surface support portion, and the movable member is provided with a hand-held member so that its vertical position relative to the movable member can be adjusted. Effect of the Invention

[0006] According to the present invention, since the battery can be replaced, the time during which work is interrupted due to exhaustion of battery power can be reduced. [Brief description of the drawings]

[0007] [Figure 1] 1 is a front view showing an example of a building material lifting device according to the present invention. [Diagram 2] FIG. 4 is a front view showing the building material lifting device with the movable member raised. [Diagram 3] FIG. [Figure 4] FIG. 4 is a left side view showing the building material lifting device with the movable member raised. [Diagram 5] 1A is a top view of the building material lifting device, with the base member and running wheels etc. omitted, and FIG. 1B is a bottom view of the building material lifting device. [Figure 6] FIG. 2 is a rear perspective view of the construction material lifting device. [Figure 7] 1A and 1B show an example of a support member, where (a) is a front view and (b) is a right side view of (a). [Figure 8] 11 is a perspective view showing an example of an operation of lifting and lowering a building material by the building material lifting device. FIG. [Figure 9] 1A and 1B are side views showing another example of a building material lifting device according to the present invention, in which (a) shows an upright position, (a) shows a position tilted so that the auxiliary wheels are in contact with the loading surface, and (c) shows a position tilted further. [Figure 10] FIG. 4 is a front view showing another example of a building material lifting device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] This embodiment discloses the following features. The first feature is a building material lifting device including a base member that can be placed on any surface to be placed, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that lifts and lowers the movable member, the movable member integrally including a building material lower surface receiving portion that protrudes in one direction along the surface to be placed and receives the lower surface of the building material to be placed, and a building material upright surface support portion that is in contact with or close to the upright surface of the building material above the building material lower surface receiving portion, The lifting mechanism includes an electric motor as a power source and a battery that supplies power to the electric motor, and the battery is detachably mounted in a portion other than the building material underside receiving portion and the building material upright surface supporting portion (see Figures 1 to 9).

[0009] As a second feature, the battery is provided on the side opposite to the one direction (see Figs. 3 and 4).

[0010] As a third feature, the battery is provided near the upper end of the movable member so as to be removable from above (see FIGS. 1 and 3).

[0011] As a fourth feature, the lifting mechanism includes a screw shaft supported in the vertical direction on one of the base member and the movable member, and a nut-shaped member fixed to the other of the base member and screwed onto the screw shaft, and the movable member is lifted and lowered by rotating the screw shaft using the electric motor (see Figures 1 and 2).

[0012] As a fifth feature, a display unit that displays information including the remaining charge of the battery is provided at the upper end of the movable member (see FIGS. 5 and 6).

[0013] As a sixth feature, the building material standing surface supporting portion is provided with a suction tool for suctioning the building material (see Figs. 3, 4 and 6).

[0014] As a seventh feature, a lift amount display means is provided for displaying the amount of lift of the movable member (see FIG. 2).

[0015] As an eighth feature, the lift amount display means provides a scale extending in the vertical direction on one of the base member and the movable member, and an indicator for pointing to a specific position on the scale on the other, and changes the relative position of the indicator with respect to the scale as the movable member lifts and lowers (see FIG. 2).

[0016] As a ninth feature, a hand-held member is provided on the movable member so that its vertical position with respect to the movable member can be adjusted (see FIG. 9).

[0017] In addition, in the embodiments described below, the invention in which only the following constituent elements are essential is also disclosed. That is, one aspect of the present invention is a building material lifting device comprising a base member that can be placed on any surface to be placed on, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the surface to be placed on and receives the underside of the building material to be placed on, and a building material upright surface support portion that is above the building material underside receiving portion and contacts or is close to the upright surface of the building material, and the lifting mechanism comprises a screw shaft supported in the up and down direction on one of the base member and the movable member, and a nut-shaped member fixed to the other of the base member and screwed onto the screw shaft, and the movable member is raised and lowered by rotating the screw shaft using the electric motor (see Figures 1 and 2).

[0018] Another invention is a building material lifting device comprising a base member that can be placed on any desired mounting surface, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface to receive the underside of the building material to be placed thereon, and a building material upright surface support portion above the building material underside receiving portion that contacts or is close to the upright surface of the building material, and the building material upright surface support portion is provided with a suction device for adsorbing the building material (see Figures 3, 4 and 6).

[0019] Another invention is a building material lifting device comprising a base member that can be placed on any mounting surface, a movable member engaged with the base member so as to be able to move up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface to receive the underside of the building material to be placed thereon, and a building material upright surface support portion that is above the building material underside receiving portion and contacts or is close to the upright surface of the building material, and is provided with a lifting amount display means that displays the amount of lifting of the movable member (see Figure 2).

[0020] Another invention is a building material lifting device comprising a base member that can be placed on any desired mounting surface, a movable member engaged with the base member so as to be movable up and down, and a lifting mechanism for raising and lowering the movable member, wherein the movable member integrally comprises a building material underside receiving portion that protrudes in one direction along the mounting surface to receive the underside of the building material to be placed thereon, and a building material upright surface support portion that is above the building material underside receiving portion and contacts or is close to the upright surface of the building material, and a hand-held member is provided on the movable member so that its vertical position relative to the movable member can be adjusted (see Figure 9).

[0021] <Specific embodiment> Next, specific embodiments having the above-mentioned features will be described in detail with reference to the drawings. The building material lifting device 1 comprises a base member 10 that can be placed on any mounting surface F, a movable member 20 engaged with the base member 10 so as to be movable up and down, a lifting mechanism 30 that raises and lowers the movable member 20 between the base member 10 and the movable member 20, and a lifting amount display means 40 that displays the amount of lift of the movable member 20, and transports and raises and lowers a building material X (see Figures 3 and 4) placed on the movable member 20.

[0022] The support surface F is a floor surface, the ground surface, or the like, and in the illustrated example is a substantially flat horizontal surface.

[0023] The base member 10 comprises a base body 11 located above and away from the support surface F, a plurality of running wheels (more specifically, main wheels 12 and secondary wheels 13) supported by the base body 11 and capable of rolling on the support surface F, and a slide mechanism 14 secured within the base body 11 and extending upward.

[0024] The base member 10 is configured in a generally flat shape such that its length in the running direction of the running wheels (left-right direction in Figs. 1 and 2) is longer than its length in a direction perpendicular to the running direction (left-right direction in Figs. 3 and 4). In the following description, the "running direction" may be referred to as the width direction of the main body, and the "orthogonal direction" may be referred to as the thickness direction of the main body.

[0025] The base body 11 has a rectangular shape when viewed from the front, and has a generally concave cross section in the vertical direction. 5(b), the base body 11 is formed by joining a plurality of members, such as an outer member 11a having a C-shaped steel cross section, and a member 11b having a U-shaped cross section that reinforces the member 11a from the inside. Other examples of the base body 11 include a mode in which some of these members are omitted, or a mode in which some or all of these members are formed from an integrated member.

[0026] The running wheels are composed of one main wheel 12 located inside the base body 11 and two sub-wheels 13, 13 disposed outside the base body 11 on either side of the running direction of the main wheel and capable of rolling in the same running direction.

[0027] The main wheel 12 is rotatably supported by a bracket 12a (see Figure 5(b)) fixed inside the base body 11, and the lower end side of its outer circumferential surface protrudes downward beyond the lower end of the base body 11 (see Figures 1 and 2).

[0028] One of the sub-wheels 13 is rotatably supported on one outer surface of the base body 11 via a bracket 13a (see FIGS. 1 and 2) so that its rotation axis is parallel to that of the main wheel 12 (see FIG. 5(b)). The other sub-wheel 13 is similarly rotatably supported on the other outer surface of the base body 11 via a bracket 13a.

[0029] When the base body 11 is in an upright position, the lower ends of the secondary wheels 13, 13 on both sides are higher than the lower ends of the main wheels 12. That is, a minute gap s is secured between each secondary wheel 13 and the support surface F (see FIGS. 1 and 2). Here, the upright state means a state in which the base body 11 stands substantially upright relative to the placement surface F. The auxiliary wheels 13, 13 on both sides come into contact with the placement surface F by slightly tilting the base body 11 in the traveling direction (rightward or leftward according to FIG. 1).

[0030] The slide mechanism 14 is configured by slidably engaging a second rail member 14b that is substantially parallel to a first rail member 14a. The slide mechanism 14 shown in Fig. 5(b) has a bearing 14c interposed between the first rail member 14a and the second rail member 14b to reduce resistance during sliding, and may be referred to as a slide rail or the like.

[0031] The slide mechanism 14 having the above-mentioned configuration is supported on both side walls of the base body 11 (see FIG. 1 and FIG. 5(b)). Each slide mechanism 14 has a first rail member 14a fastened to the side wall of the base body 11 and a second rail member 14b fastened to the movable member body 21 (more specifically, the columnar member 21a), with the upper side extending upward.

[0032] The movable member 20 is integrally provided with a building material underside receiving portion A that protrudes in one direction (leftward in Figure 3) along the mounting surface F to receive the underside of the building material X to be placed thereon, a building material upright surface supporting portion B that extends upward from the building material underside receiving portion A and is in contact with or close to the upright surface x1 of the building material X to be placed thereon, and a support portion 23b that protrudes in the opposite direction to the one direction (rightward in Figure 3) so as to position the base member 10 between the building material underside receiving portion A and the building material underside receiving portion A.

[0033] More specifically, the movable member 20 is integrally provided with a movable member main body 21, the lower side of which is fitted into the base body 11 so as to be freely movable in the vertical direction and extended upward in a long shape, a building material receiving member 22 which extends in the one direction (leftward in Figures 3 and 4) from the lower end side of the movable member main body 21 with a building material underside receiving portion A, and a support member 23 which protrudes in the opposite direction to the one direction (rightward in Figures 3 and 4) from the lower end side of the movable member main body 21.

[0034] The movable member main body 21 is a member having a hollow frame shape in cross section extending in the vertical direction. The movable member main body 21 is integrally composed of a plurality of members, such as a columnar member 21a having a concave cross section with an opening on one side in the thickness direction of the main body, a surface panel 21b that closes the opening of the columnar member 21a, a battery mounting section 21c on the upper side of the surface panel for mounting a battery, and an operating device mounting section 21d fixed to the outer surface of the columnar member 21a. It is possible for some or all of these multiple members to be integrated into one member, or for some members other than the columnar members 21a to be omitted.

[0035] The columnar member 21a is made by processing a metal material into a C-shaped steel shape (see FIG. 5(b)), and is formed into a long shape extending in the vertical direction. The lower side of the columnar member 21a is inserted into the base member 10, and slides in the vertical direction relative to the base member 10 via the slide mechanism 14.

[0036] The front panel 21b covers the front side of the columnar member 21a so that the lifting mechanism 30, which will be described later, is not exposed (see FIG. 1). As another example, the front panel 21b may be omitted, and the lifting mechanism 30 may be exposed.

[0037] The battery mounting section 21c is located on the opposite side (the right side according to FIG. 3) to the direction in which the building material underside receiving section A protrudes, and is formed in a groove shape that is open upward. The battery mounting section 21c mounts the battery 34 on the inner bottom surface (in other words, the back surface) of the groove-shaped portion via a battery socket 21c1 (see FIG. 5(a)) so that the battery 34 can be inserted and removed from above.

[0038] The controller mounting portion 21d is a member for detachably mounting the controller 35, and in the illustrated example, is formed in a substantially concave shape that allows the controller 35 to be inserted and removed from above (see FIGS. 1 to 4). The engagement structure between the actuator 35 and the actuator mounting portion 21d can be other than the example shown in the figure, as long as it is a detachable structure, such as a hook-shaped engaging portion on one side engaging with a receiving portion on the other side, or a magnet on one side attracting a magnetic body on the other side.

[0039] Further, on the upper end surface of the movable member main body 21, a hand-held member 28, a display unit 37 for displaying information including the remaining charge of the battery 34, and the like are provided.

[0040] The handheld member 28 is a member that is roughly inverted U-shaped when viewed from the front and protrudes upward from the upper end of the movable member main body 21, and is held by a worker or the like when the building material lifting device 1 is moved or carried.

[0041] A building material receiving member 22 and a support member 23 are provided on the lower side of the movable member body 21 having the above-mentioned structure. The building material receiving member 22 is formed into a roughly L-shaped vertical cross section and comprises a flat mounting piece 22a fastened to the rear surface of the movable member main body 21 and a building material underside receiving portion A protruding from the lower end of the mounting piece 22a along the mounting surface F (see Figures 3, 6, etc.).

[0042] The mounting piece 22a overlaps the back surface of the movable member body 21 to form the building material standing surface supporting portion B. That is, the building material standing surface supporting portion B is a substantially vertical surface including the back surface of the movable member body 21 and the surface of the mounting piece 22a. As another example, the mounting piece 22a may be omitted and the building material underside receiving portion A may be directly connected to the rear surface of the movable member main body 21. In this case, the building material upright surface supporting portion B becomes a long rectangular surface extending in the vertical direction over almost the entire rear surface of the movable member main body 21.

[0043] The building material underside receiving portion A has a flat plate portion a1 parallel to the surface F to be placed on, and a bent piece portion a2 connected to the tip side of the flat plate portion a1 and bent upward so that the tip side is away from the surface F to be placed on. The flat plate portion a1 is a horizontal and flat surface on which the building material X can be placed.

[0044] The bent piece a2 protrudes obliquely upward from the tip of the flat plate a1 toward the outside in the thickness direction of the main body. As another example of the bent piece a2, it is possible to have a shape other than the illustrated example, such as a concave curved surface (in other words, a vertical cross section of an arc). When the building material X is placed on this bent piece a2, the building material X is guided by the upper surface of the bent piece a2 to the building material lower surface receiving portion A side and is attracted to the suction tool 29 (magnet). The building material X placed on the building material lower surface receiving portion A is prevented by the bent piece portion a2 from shifting in a direction away from the movable member main body 21. In other words, the building material X placed on the building material lower surface receiving portion A is well-settled.

[0045] The building material lower surface receiving portion A of the above configuration may have any shape as long as the building material X can be placed thereon from above and can be removed upward, and as another example, it may have a concave curved surface or other shapes.

[0046] The building material standing surface supporting portion B is provided with one or more suction tools 29 for suctioning the building material X. The suction tool 29 is a flat magnet (permanent magnet), and in the illustrated example, is attached to two places, the upper end side of the back surface of the movable member main body 21 and the lower end side of the mounting piece 22a. The suction tool 29 is attracted to the building material X placed on the building material lower surface receiving portion A, and integrates the building material lifting device 1 and the building material X. The suction tool 29 may be anything that can detachably suction the building material X, and may be, for example, a suction cup or an adhesive tape with an appropriately adjusted suction force.

[0047] In addition, the support member 23 is composed of fastening pieces 23a, 23a on both the left and right sides that are fastened to the lower part of the front of the movable member main body 21, and a support portion 23b that protrudes outward in the thickness direction of the main body from these fastening pieces 23a, 23a and extends downward (see Figures 3, 4, 7, etc.).

[0048] The fastening pieces 23a are formed in a flat plate shape, and are fastened to both the left and right sides of the front of the movable member main body 21 by screwing, welding, adhesive, or the like (see FIGS. 1 and 2). As another example, it is also possible to omit the fastening piece portion 23a and have the support portion 23b fastened directly to the movable member main body 21.

[0049] The support portion 23b is configured as an integral, roughly concave frame-like shape when viewed from the front, and is made up of support piece portions 23b1, 23b1 on both left and right sides which protrude outward in the thickness direction of the main body from the fastening piece portions 23a, 23a on both sides and extend downward, and a connection piece portion 23b2 connected between the lower ends of these support piece portions (see Figure 7). The support portion 23b has a lower end surface of the connection piece portion 23b2 extending elongatedly in a direction (main body thickness direction) perpendicular to the one direction (projecting direction of the support portion 23b) and contacts the placement surface F. The support portion 23b and the building material lower surface receiving portion A are disposed on both sides of the base member 10 and the movable member main body 21 so as to be interposed therebetween. These configurations allow the building material lifting device 1 to have an improved weight balance in the thickness direction of the main body, and to maintain a stable upright posture in a space-saving manner.

[0050] In the illustrated example, the separate connecting piece portion 23b2 is connected to the supporting piece portions 23b1, 23b1, but these may be formed as an integrated member.

[0051] The lower ends of the building material underside receiving portion A and the support portion 23b are at approximately the same height as the lower end of the main wheel 12, and come into contact with or close to (contacting according to the illustrated example) the placement surface F when the movable member 20 descends to a predetermined lower limit position.

[0052] The lifting mechanism 30 also includes a screw shaft 31 supported in the vertical direction on one of the base member 10 and the movable member 20 (the movable member 20 in the illustrated example), a nut-shaped member 32 fixed to the other and screwed onto the screw shaft 31, an electric motor 33 as a power source for the screw shaft 31, a battery 34 as a power source for the electric motor 33, an operator 35 that transmits an operation signal via a wired cable 35a, a control unit 36 ​​that controls the electric motor 33 in response to the input operation signal, and a display unit 37 that displays information including the remaining charge of the battery 34, and raises and lowers the movable member 20 by rotating the screw shaft 31.

[0053] The screw shaft 31 is a shaft-shaped member having a male threaded portion on its outer peripheral surface, and according to the illustrated example, is arranged in a long shape extending in the vertical direction within the movable member main body 21, and its upper end side is supported freely rotatable but immovable vertically relative to the movable member main body 21 via a bracket, bearing member, etc. (not shown). A driven gear 31 a that receives a rotational force from an electric motor 33 is fixed to the upper end side of the screw shaft 31 so as to be rotatable together with the screw shaft 31 . The lower end of the screw shaft 31 is screwed into a nut-shaped member 32 and extends further downward.

[0054] The nut-like member 32 is a member having a female threaded portion on its inner surface that screws onto the screw shaft 31, and is fixed non-rotatably and non-vertically movable to the upper end side of a cylindrical bracket 32a whose central axis faces in the vertical direction.

[0055] The cylindrical bracket 32a is a cylindrical member that extends in the vertical direction, and its lower end side is fixed to the base member 10 via another bracket (not shown) so as to be non-rotatable and non-movable in the vertical direction. As another example, the cylindrical bracket 32a may be a bracket having a shape other than that shown in the example, or the cylindrical bracket 32a may be omitted and the nut-like member 32 may be fixed directly to the base member 10.

[0056] The electric motor 33 is a DC electric motor that rotates with power supplied from a battery 34 via a control unit 36 ​​. The electric motor 33 has a surrounding casing fixed to the movable member body 21 via a bracket (not shown) or the like, and has an output shaft protruding upward. A driving gear 33a that transmits rotational force to the driven gear 31a is fixed to the output shaft so as to rotate integrally therewith.

[0057] In the illustrated example, the driving gear 33a and the driven gear 31a are directly meshed with each other. However, as another example, one or more gears may be interposed between these two gears, and the torque and rotation speed of the driving gear 33a may be appropriately adjusted and transmitted to the driven gear 31a.

[0058] The battery 34 is, for example, a lithium ion battery or other secondary battery. The battery 34 is configured to be insertable into and removable from the battery socket 21c1 of the battery mounting section 21c from above, and is configured not to be removed toward the front or downward. The attachment / detachment means may be, for example, a C-shaped steel rail portion provided on one of the battery 34 and the battery socket 21c1, and a fitting portion that fits inside the rail portion and can be pulled out upward. The power of the battery 34 is transmitted to a control unit 36 ​​in the columnar member 21a via the battery socket 21c1, and is further supplied from the control unit 36 ​​to the lifting mechanism 30, which will be described later.

[0059] The operating device 35 is configured in a box or plate shape that fits in the hand of a worker or the like, and has on its front side push switches 35b, 35c (for example, automatic return type push button switches) that raise and lower the movable member main body 21, and on its back side is provided an attraction device 35d that can be attracted to the building material X. In the illustrated example, the attraction device 35d is a magnet (permanent magnet), but it can also be a suction cup or the like. The controller 35 is electrically connected to the control unit 36 ​​by a wired cable 35a and is stored in the controller mounting part 21d. When in use, the controller 35 is removed from the controller mounting part 21d and attached to the surface of the building material X by the magnet, and transmits electrical signals corresponding to the operation of the push switches 35b and 35c to the control unit 36 ​​via the wired cable 35a. In the illustrated example, the push switch 35b is a switch for raising the structure, and the push switch 35c is a switch for lowering the structure.

[0060] The control unit 36 ​​is composed of an electronic circuit including, for example, a one-chip microcomputer, and controls the power supplied from the battery 34 to the electric motor 33 in response to electrical signals from the operating device 35 and a limit switch (not shown), etc., and controls the electric motor 33 to rotate forward, reverse, ON / OFF, etc.

[0061] More specifically, when the push switch 35b for lifting of the operating device 35 is pressed, the control unit 36 ​​receives a signal from the push switch 35b and rotates the electric motor 33 in the forward direction to lift the movable member 20. During this lifting, when the pressure on the push switch 35b is released and the operating device 35 no longer receives the signal, the power to the electric motor 33 is cut off to stop the lifting of the movable member 20. When the push switch 35c for lowering of the operating device 35 is pressed, the control unit 36 ​​receives a signal from the push switch 35c and reverses the electric motor 33 to lower the movable member 20. During this descent, when the pressure on the push switch 35c is released and the operating device 35 no longer receives the signal, the power to the electric motor 33 is cut off to stop the descent of the movable member 20.

[0062] In addition, a lower limit switch (not shown) that emits a signal when the movable member 20 reaches a predetermined lower limit position, and an upper limit switch (not shown) that emits a signal when the movable member 20 reaches a predetermined upper limit position are provided within the movable member body 21. When the control unit 36 ​​receives a signal from the upper limit switch while the movable member 20 is ascending, it stops the forward rotation of the electric motor 33, thereby stopping the ascent of the movable member 20. When the control unit 36 ​​receives a signal from the lower limit switch while the movable member 20 is descending, it stops the reverse rotation of the electric motor 33, thereby stopping the descent of the movable member 20.

[0063] In addition, the control unit 36 ​​displays information such as the control state of the electric motor 33 and the remaining charge of the battery 34 on the display unit 37. The display unit 37 is a display device such as a liquid crystal display device, and displays the remaining charge of the battery 34, the control state (ascending or descending), etc., based on a signal from the control unit 36 ​​in the movable member body 21.

[0064] In addition, the lift amount display means 40 provides a scale 41 extending in the vertical direction on one of the base member 10 and the movable member 20 (movable member 20 in the illustrated example), and provides an indicator 42 on the other of them that points to a specific position on the scale 41, and changes the relative position of the indicator 42 with respect to the scale 41 as the movable member 20 lifts and lowers.

[0065] To explain the illustrated example in detail, the scale 41 is engraved in the vertical direction on the widthwise end side of the lower front side of the movable member body 21. The indicating portion 42 is the upper edge of the base member 10. That is, the base member 10 indicates a specific position on the scale 41 with its upper edge, and covers the lower portion of the scale 41 with the portion below the upper edge. Therefore, when the movable member 20 rises relative to the base member 10, the scale 41 also rises and becomes exposed, and the exposed length of the scale 41 gradually increases. Then, a specific position of the exposed scale 41 is indicated by the indicating unit 42. Therefore, an operator or the like can quickly grasp how far the movable member 20 has risen from the position of the scale 41 indicated by the indicating unit 42, the length of the exposed scale 41, etc.

[0066] Next, the characteristic functions and effects of the building material lifting device 1 having the above configuration will be described in detail. The building material X in the illustrated example is a relatively heavy door (for example, a fire door) made of a metal material. When an operator or the like operates the operating device 35 to lower the movable member 20 to a predetermined lower limit position, both the building material underside receiving portion A and the support portion 23b come into contact with the placement surface F at a position where the base member 10 is sandwiched in the thickness direction (in other words, on both sides in the axial direction of the running wheels), and the building material lifting device 1 is maintained in a good self-supporting state. Therefore, for example, when a building material X is placed on the building material lifting device 1 in an upright position as shown in FIG. 3, the building material lifting device 1 can be prevented from wobbling in the thickness direction of the main body due to contact with the building material X. Then, the worker or the like can support the building material X with one hand and operate the operating device 35 attached to the building material X with the other hand to raise or lower the movable member 20 and the building material X. Therefore, for example, as shown in Fig. 8, the work of suspending the fire door, which is the building material X, on the frame body Y can be easily performed. In the example shown in FIG. 8, the symbol Z denotes a flag hinge in which a cylindrical portion of one half is fitted onto an upward axis of the other half of the flag-shaped hinge.

[0067] Furthermore, when the battery 34 becomes completely depleted due to repeated operations as described above, the battery 34 can be removed upward and replaced with another charged battery, making the battery replacement operation easy and quick. This reduces the need to interrupt work due to battery charging.

[0068] Furthermore, if the battery 34 becomes completely depleted while the movable member 20 is being raised or lowered, or if the battery 34 is accidentally pulled out while the movable member 20 is being raised, the power supply to the electric motor 33 will be cut off. However, even in such cases, the weight of the movable member 20 is supported by the screw engagement between the screw shaft 31 and the nut-shaped member 32, so that the movable member 20 can be prevented from suddenly descending. Similarly, when the pressing force on the push switches 35b, 35c of the operating device 35 is eased or when the upper limit switch is activated due to the rise of the movable member 20, the movable member 20 can be prevented from suddenly descending.

[0069] Furthermore, in the upright position, the building material lifting device 1 has the secondary wheels 13, 13 separated from the surface F on which it is placed and the main wheels 12 grounded on the surface F on which it is placed, so that it can rotate about a vertical line passing through the center of the main wheels 12. Therefore, if a worker or the like supports the building material lifting device 1 or the building material X placed on the building material lifting device 1 with his or her hands and pulls both secondary wheels 13, 13 away from the surface F on which it is placed, the above-mentioned rotational movement is possible, and it is possible to easily perform, for example, an operation of rotating the building material lifting device 1 to make it parallel to the building material X, or an operation of rotating the building material lifting device 1 to adjust the position of the placed building material X in the rotational direction about the vertical line.

[0070] <Other Modifications> According to the above embodiment, as a particularly preferred embodiment, the battery 34 is arranged on the side opposite to the protruding direction (the above-mentioned one direction) of the building material underside receiving part A (the right side according to Figure 3), but as another example, the battery 34 can also be arranged in a part other than the building material underside receiving part A and the building material upright surface supporting part B, such as the left or right side of the movable member 20.

[0071] In addition, in the above embodiment, the operating device 35 is connected to the movable member 20 by a wired cable 35a to prevent the operating device 35 from being lost. However, as another example of the operating device 35, it is also possible to omit the wired cable 35a and transmit an operating signal wirelessly to the control unit 36.

[0072] Furthermore, according to the above embodiment, the lift amount display means 40 has a scale 41 provided on the movable member 20 and an indicator 42 provided on the base member 10, but as another example of this lift amount display means 40, it is also possible to provide the scale 41 on the base member 10 and the indicator 42 on the movable member 20.

[0073] Furthermore, according to the above embodiment, the lift amount display means 40 is configured with the scale 41 and the indicator 42, etc., but as another example of this lift amount display means 40, it is also possible to configure the control unit 36 ​​to calculate the amount of lift of the movable member 20 from the amount of rotation of the electric motor 33 and display it on the display unit 37.

[0074] Furthermore, according to the above embodiment, a feed screw mechanism is used for the lifting mechanism 30 as a particularly preferred example, but other examples of the lifting mechanism 30 include a configuration using a hydraulic cylinder or a pneumatic cylinder, or a configuration using a mechanism using a rack and gears.

[0075] Furthermore, according to the above embodiment, the lifting mechanism 30 supports the screw shaft 31, the electric motor 33, etc. on the movable member 20 and fixes the nut-shaped member 32 to the base member 10. However, as another example of this lifting mechanism 30, the screw shaft 31, the electric motor 33, etc. may be supported on the base member 10 and the nut-shaped member 32 may be fixed to the movable member 20.

[0076] In addition, according to the above embodiment, the support portion 23b is provided integrally with the movable member 20. However, as another example, the support portion 23b can be provided integrally with the base member 10, rather than being provided with the movable member 20. That is, in this other example, by fastening the fastening piece portion 23a of the support member 23 to the base member 10, the support portion 23b is caused to protrude in the one direction (to the right in Figure 3), and the lower end of this support portion 23b is brought close to or into contact (preferably close to) the support surface F. In this other example as well, similarly to the above embodiment, the self-supporting property of the entire building material lifting device 1 can be improved.

[0077] Furthermore, according to the above embodiment, the lower end side of the support portion 23b is formed into a concave frame shape, but as another preferred example, an auxiliary wheel 23c may be provided on the lower end side of the support portion 23b', as in the building material lifting device 2 shown in Figure 9. More specifically, the building material lifting device 2 is the same as the building material lifting device 1 except that the support member 23 is replaced by a support member 23' and the hand-held member 28 is replaced by a hand-held member 28'.

[0078] The support member 23' is the same as the support member 23 except that the support portion 23b is replaced with a support portion 23b'. The support portion 23b' has the left and right support pieces 23b1, 23b1 configured as described above shortened at their lower ends, and the auxiliary wheels 23c are rotatably provided at the lower ends via the pivot members 23d. The left and right auxiliary wheels 23c, 23c have rotation axes perpendicular to the main wheel 12 and the auxiliary wheel 13, and are mounted so as to roll in the thickness direction of the main body. These auxiliary wheels 23c, 23c are set at a height position so that they are close to the supporting surface F when the base member 10 is in an upright position, and come into contact with the supporting surface F when the upper end side of the base member 10 is tilted toward the support portion 23b'.

[0079] Moreover, the hand-held member 28' is configured such that the vertical position of the hand-held member 28 is adjustable, and the portion to be held on the upper end side is bent obliquely upward toward the support portion 23b'. The lower end side of hand-held member 28' engages movable member main body 21 so as to be slidable in the up and down direction, and is configured so that the slide can be engaged and disengaged at a plurality of predetermined height positions. One example of the means for engaging and disengaging hand-held member 28' at the above height positions may be to provide a plurality of recesses on the outer circumferential surface of a rod material constituting hand-held member 28', and to provide protrusions on the movable member main body 21 side that resiliently appear and disappear to engage and disengage with the recesses.

[0080] Therefore, according to the building material lifting device 2 configured as above, it is possible to improve the independence as with the building material lifting device 1 described above, and in addition, a worker or the like can grasp the hand-held member 28' extended upward, tilt the entire building material lifting device 2 toward the support part 23b', bring the auxiliary wheels 23c into contact with the loading surface F, and pull the building material receiving member 22 and the running wheels away from the loading surface F and roll it, thereby easily moving the entire building material lifting device 2 (see Figures 9(a) to (c)).

[0081] Furthermore, according to the above embodiment, the support member 23 (support portion 23b) is fixed immovably to the base member 10 or the movable member 20, but as another example of this support member (support portion), it is also possible to make it displaceable between a support position where it is engaged so as to be close to or in contact with the support surface F, and a storage position where it is engaged away from the support surface F and above it. A building material lifting device 3 shown in FIG. 10 is the same as the building material lifting device 1 described above, except that the support member 23 is replaced with a support member 24 . The support member 24 comprises a support portion 24a supported so as to rotate between a support position close to or in contact with the support surface F and a storage position above and away from the support surface F, a base portion 24b which movably supports the support portion 24a and engages it at the support position and the storage position, and a biasing member 24c (in the illustrated example, a tension coil spring) which biases the support portion 24a towards the support position and the storage position with fulcrum p as the boundary, and the base portion 24b is fixed to the base member 10. For example, the structure of a one-legged stand for a bicycle can be applied to this support member 24. According to this configuration, when in use, the support part 24a can be stood upright, so that the building material lifting device 3 can be maintained in a stable upright position, and when the building material lifting device 3 is moved, the support part 24a can be rotated in a folding manner, so that the support part 24a is positioned away from the mounting surface F.

[0082] Furthermore, as a modified example of the building material lifting device 3, it is possible to have an embodiment (not shown) that is equipped with a support portion so as to slide between a support position where it is engaged so as to be close to or in contact with the loading surface F, and a storage position where it is engaged away from the loading surface F and above.

[0083] In addition, as examples other than the examples shown in the drawings, it is possible to adopt a configuration in which in the building material lifting device 1 the support member 23 is not provided on the movable member 20 but is integrated with the base member 10, in the building material lifting device 2 the support member 23' is not provided on the movable member 20 but is integrated with the base member 10, and in the building material lifting device 3 the support member 24 is not provided on the base member 10 but is integrated with the movable member 20, etc. Furthermore, as other examples, it is also possible to provide support members 23, 23' or 24 on both the base member 10 and the movable member 20 in the building material lifting device 1, 2 or 3, or to provide multiple types of support members on a single building material lifting device. Furthermore, when the support member is provided on the base member 10, it is preferable to configure the support portion of the support member to be close to but not in contact with the loading surface F in order to facilitate movement by the running wheels of the building material lifting device.

[0084] The building material lifting device configured as described above is particularly suitable for the task of suspending door bodies, such as hinged doors including fire doors, overhead sliding doors, folding doors, etc., into door frames, etc., but it can also be used for other purposes, such as lifting and lowering various building materials, such as door frames, partitions, shutter curtains of shutter devices, guide rails, shutter boxes, wall materials, floor materials, ceiling materials, etc.

[0085] Furthermore, the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention. [Explanation of symbols]

[0086] 1, 2, 3: Building material lifting device 10: Base material 11: Base body 12: Main wheel 13: Secondary wheel 20: Movable parts 21: Movable member body 21a: Pillar member 21b: Surface panel 21c: Battery mounting area 22: Building material support member 23, 23', 24: Support members 23b, 23b', 24a: Support part 23c: Training wheel 28,28':Hand-held materials 30: Lifting mechanism 31: Screw shaft 32: Nut-shaped member 33: Electric motor 34: Battery 35:Operator 36: Control unit 40: Lift amount display means A: Lower part of building material B: Building material upright surface support part s: gap

Claims

1. A construction material lifting device including a base member that can be placed on any surface to be placed on, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that lifts and lowers the movable member, The movable member is integrally provided with a building material lower surface receiving portion that protrudes in one direction along the placement surface and receives the lower surface of the building material to be placed, and a building material upright surface support portion that contacts or is close to the upright surface of the building material above the building material lower surface receiving portion, The lifting mechanism includes an electric motor as a power source and a battery that supplies power to the electric motor, The battery is detachably provided in a portion other than the building material lower surface receiving portion and the building material upright surface supporting portion, A building material lifting device characterized in that the battery is arranged near the upper end of the movable member and can be inserted and removed from above.

2. A building material lifting device comprising a base member that can be placed on any supporting surface, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that raises and lowers the movable member, The movable member is integrally provided with a building material lower surface receiving portion that protrudes in one direction along the placement surface and receives the lower surface of the building material to be placed, and a building material upright surface support portion that contacts or is close to the upright surface of the building material above the building material lower surface receiving portion, The lifting mechanism includes an electric motor as a power source and a battery that supplies power to the electric motor, The battery is detachably provided in a portion other than the building material lower surface receiving portion and the building material upright surface supporting portion, A building material lifting device characterized in that a display unit that displays information including the remaining charge of the battery is provided at the upper end of the movable member.

3. A building material lifting device comprising a base member that can be placed on any supporting surface, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that raises and lowers the movable member, The movable member is integrally provided with a building material lower surface receiving portion that protrudes in one direction along the placement surface and receives the lower surface of the building material to be placed, and a building material upright surface support portion that contacts or is close to the upright surface of the building material above the building material lower surface receiving portion, The lifting mechanism includes an electric motor as a power source and a battery that supplies power to the electric motor, The battery is detachably provided in a portion other than the building material lower surface receiving portion and the building material upright surface supporting portion, A building material lifting device characterized in that the building material standing surface support portion is provided with a suction tool for suctioning the building material.

4. A building material lifting device comprising a base member that can be placed on any supporting surface, a movable member that is engaged with the base member so as to be movable up and down, and a lifting mechanism that raises and lowers the movable member, The movable member is integrally provided with a building material lower surface receiving portion that protrudes in one direction along the placement surface and receives the lower surface of the building material to be placed, and a building material upright surface support portion that contacts or is close to the upright surface of the building material above the building material lower surface receiving portion, The lifting mechanism includes an electric motor as a power source and a battery that supplies power to the electric motor, The battery is detachably provided in a portion other than the building material lower surface receiving portion and the building material upright surface supporting portion, A building material lifting device characterized in that a hand-held member is provided on the movable member so that its vertical position relative to the movable member can be adjusted.

5. The building material lifting device according to any one of claims 1 to 4, characterized in that the battery is provided on the opposite side to the one direction.

6. The lifting mechanism comprises a screw shaft supported in the vertical direction on one of the base member and the movable member, and a nut-shaped member fixed to the other of the base member and screwed onto the screw shaft, and the movable member is raised and lowered by rotating the screw shaft using the electric motor. A building material lifting device as described in any one of claims 1 to 5, characterized in that the lifting mechanism comprises a screw shaft supported in the vertical direction on one of the base member and the movable member, and a nut-shaped member fixed to the other of the base member and screwed onto the screw shaft using the electric motor, and the movable member is raised and lowered.

7. 7. The building material lifting device according to claim 1, further comprising a lift amount display means for displaying the amount of lift of the movable member.

8. The building material lifting device described in claim 7, characterized in that the lifting amount display means provides a scale extending in the vertical direction on one of the base member and the movable member, and an indicator portion on the other of them that points to a specific position on the scale, and changes the relative position of the indicator portion with respect to the scale as the movable member rises and falls.

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