JP5451584B2 - Board lift up machine - Google Patents

Description

  The present invention relates to a board lift-up machine that supports a board such as a plaster board in a construction work when the board is attached to a base material.

  Japanese Laid-Open Patent Publication No. 4-323468 discloses a jig for lifting a board. This board lifting jig is a kind of board lift-up machine. In this board lifting jig, a swing arm is swingably attached to a substrate placed on the floor. A mounting portion for placing the lower end of the board on the tip of the swing arm is provided. The board is lifted by depressing the rear end of the swing arm. The board is nailed and fixed with the board raised to an appropriate height. This board lifting jig makes it easy to attach the board to the base material.

JP-A-4-323468

  When the board lifting jig is moved while the board is lifted, the substrate is rubbed against the floor surface. It is difficult to move the board lifting jig with the board lifted up. This board lifting jig may damage the floor surface. If it is necessary to fine-tune the position of the board, it is necessary to lift the board by hand to correct it. In some cases, it is necessary to correct the position of the board lifting jig while holding the board by hand.

  With this board lifting jig, it is difficult to finely adjust the position of the lifted board. The board lifting jig needs to be temporarily placed at a position where the board is pasted in advance so that the board does not have to be moved in a lifted state. It is inferior to workability to place the board in the pasting position with high accuracy.

  An object of the present invention is to provide a board lift-up machine having excellent workability.

  A board lift-up machine according to the present invention includes a step that can be stepped on with a foot, a roller that is rotatably attached to the step, and a board support that supports the board. A board support is fixed in front of the platform. This roller rolls so that the step platform can be moved in the front-rear direction. The step platform and the board support portion are rotatable with respect to the rotation shaft of the roller. The board support part includes a lift claw that supports the lower surface of the board.

  Preferably, the step of the board lift-up machine includes a shaft. The roller is attached to the shaft. This roller is movable in the longitudinal direction of the shaft with respect to the platform.

  Preferably, the board lift-up machine includes an elastic body. When the roller is located at the moving end in the longitudinal direction, the elastic body biases the roller toward the center in the longitudinal direction of the shaft.

  Preferably, the board lift-up machine includes a foot cover positioned above the instep of the foot that steps on the platform. The board support part includes a board guide facing the front of the board supported by the board support part. The foot cover extends rearward from the board guide.

  This board lift-up machine can move in the front-rear direction while being stepped on with a foot. This board lift-up machine can move the board up and down with the board placed. This board lift-up machine can be easily operated with feet without using hands. This board lift-up machine is suppressed from damaging the floor surface.

FIG. 1 is a perspective view showing a board lift-up machine according to an embodiment of the present invention. 2A is a left side view of the board lift-up machine of FIG. 1, and FIG. 2B is a bottom view of the board lift-up machine of FIG. FIG. 3 is an explanatory diagram showing a use state of the board lift-up machine of FIG. 4A is an explanatory view showing another use state of the board lift-up machine of FIG. 1, and FIG. 4B shows still another use state of the board lift-up machine of FIG. FIG. 4C is an explanatory view showing still another usage state of the board lift-up machine of FIG. FIG. 5A is an explanatory diagram showing the bottom surface of the board lift-up machine in FIG. 4B in use, and FIG. 5B is the bottom surface of the board lift-up machine in FIG. FIG. 4C is an explanatory view showing the bottom surface of still another usage state of the board lift-up machine of FIG.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  The board lift-up machine 2 in FIG. 1 includes a step platform 4, a roller 6, a board support portion 8, and a foot cover 10. An arrow X in FIG. 1 indicates a forward direction in the front-rear direction. The arrow Y indicates the left direction in the left-right direction. An arrow Z indicates upward in the vertical direction.

  As shown in FIGS. 2A and 2B, the footrest 4 is composed of a foot plate 12, a pair of left and right side plates 14, a front plate 16, a shaft bolt 22 as a shaft, a washer 24, and a nut. 26 and a spring 28 as an elastic body.

  The tread board 12 has a rectangular plate shape. The pair of left and right side plates 14 extend downward from the left and right ends of the tread plate 12. A shaft hole 18 is formed in front of the center of the side plate 14. The width of the side plate 14 in the vertical direction is gradually reduced from the position where the shaft hole 18 is formed toward the rear end. In other words, the vertical width of the side plate 14 is gradually decreased from the front to the rear end from the front-rear direction center. The front plate 16 extends downward from the front end of the tread plate 12. A pair of screw holes 20 are formed in the front plate 16.

  A male screw is formed at the tip of the shaft bolt 22. The shaft bolt 22 is passed through the shaft holes 18 of the left and right side plates 14. A washer 24 is passed through the tip of the shaft bolt 22, and a male screw at the tip is screwed into the nut 26. The shaft bolt 22 is attached to the left and right side plates 14 with its axis line in the left-right direction.

  The roller 6 has a cylindrical shape having an outer peripheral surface 30. The roller 6 includes a shaft hole 32 that passes through the shaft. A shaft bolt 22 is passed through the shaft hole 32, and the roller 6 is attached to the shaft bolt 22. The lowermost portion of the outer peripheral surface 30 of the roller 6 projects downward from the lower ends of the left and right side plates 14.

  A double-headed arrow W1 in FIG. 2B indicates the left and right width between the left side plate 14 and the right side plate 14. A double-headed arrow W2 indicates the left and right width of the roller 6. The width W2 is smaller than the width W1. The roller 6 is pivotally mounted so as to be movable in the longitudinal direction (axial direction) of the shaft bolt 22.

  A spring 28 is located between the roller 6 and the left side plate 14. A spring 28 is also located between the roller 6 and the right side plate 14. The pair of springs 28 are coil springs and are passed through the shaft bolts 22. The spring 28 biases the roller 6 toward the center in the longitudinal direction of the shaft bolt 22.

  The board support unit 8 includes a board guide 34 and a lift claw 36. The board guide 34 has a plate-like shape that faces forward and extends in the vertical direction. The lift pawl 36 extends forward from the lower end of the board guide 34. A screw 38 is screwed into the screw hole 20 with the board guide 34 interposed therebetween. The board guide 34 is attached to the front plate 16. The board support portion 8 is fixed in front of the step platform 4.

  The foot cover 10 includes a hanging plate 40 that is a hook portion that is hooked on the instep of the foot, and a guide plate 42 that is a guide portion when the foot is inserted. The hanging plate 40 extends rearward from above the board guide 34. A space is formed between the hanging plate 40 and the tread plate 12. The guide plate 42 extends obliquely upward from the rear end of the hanging plate 40 and away from the tread plate 12.

  FIG. 3 shows a base material 48 between the floor 44 and the ceiling 46. The operator leans the board 50 against the base material 48. The lower end of the board 50 is supported by the floor 44. The upper end of the board 50 is supported by the base material 48. As shown in the partially enlarged view of FIG. 3, the operator's feet are inserted between the footrest 4 and the foot cover 10 of the board lift-up machine 2. The roller 6 rolls with respect to the floor 44 when the operator steps his / her foot while stepping on the platform 4. The step 4 can move in the front-rear direction.

  There is a gap between the floor 44 and the lower end of the standing board 50. The board lift-up machine 2 is moved forward. The tip of the lift pawl 36 enters this gap. Furthermore, the board lift-up machine 2 is moved forward. The lower end of the board 50 is supported by the lift pawl 36.

  FIG. 4A shows a state where the board 50 is pressed against the base material 48 by the board lift-up machine 2. In FIG. 4A, the lift claw 36 supports the lower end of the board 50. The board guide 34 presses the board 50 against the base material 48. When the operator further moves the board lift-up machine 2 forward toward the base material 48 from the state of FIG. 3, the state of FIG.

  FIG. 4B shows a state where the operator has stepped on the step 4 backward. The step platform 4, the board support 8 and the foot cover 10 are rotated about the shaft bolt 22 as a rotation axis. The lift claw 36 rotates upward. The lower end of the board 50 is lifted upward. From the state of FIG. 4 (a), when the operator steps on the step 4 backward, the state of FIG. 4 (b) is reached.

  By adjusting the amount by which the operator steps back on the step 4, the step 4, the board support 8 and the foot cover 10 are rotated between the state shown in FIG. 4A and the state shown in FIG. 4B. Can be made. The vertical position of the board 50 can be adjusted between the state of FIG. 4A and the state of FIG.

  The operator attaches the board 50 to the base material 48 in a state where the board 50 is supported at a predetermined height. For example, the board 50 is nailed to the base material 48. The board 50 is fixed to the base material 48.

  FIG. 4C shows a state where the hanging plate 40 is hooked on the back of the operator's foot. The board lift-up machine 2 is lifted by being hooked on the instep. After the board 50 is fixed to the base material 48, the step 4 is stepped forward. The lift pawl 36 rotates downward and leaves the lower end of the board 50. An operator moves the board lift-up machine 2 backward with his / her foot. An operator hooks the back of the foot on the hanging plate 40 and lifts the board lift-up machine 2. In this way, the state shown in FIG.

  The board lift-up machine 2 can be moved by a foot without using a hand. The operator can operate the board lift-up machine 2 while performing other work by hand. This board lift-up machine 2 is excellent in workability.

  Fig.5 (a) is explanatory drawing which looked at the use condition of Fig.4 (a) from the downward direction. In FIG. 5A, the arrow X is forward in the front-rear direction, and the arrow Y is left in the left-right direction. In FIG. 5A, the left and right springs 28 urge the roller 6 toward the axial center of the axial bolt 22.

  In FIG. 5B, a rightward force F <b> 1 is applied to the step platform 4. The step platform 4 moves to the right with respect to the roller 6. The step platform 4 moves rightward against the biasing force of the spring 28. The board 50 supported by the lift pawl 36 together with the step platform 4 is also moving rightward. The roller 6 is located at the left moving end in the longitudinal direction of the shaft bolt 22.

  In FIG. 5C, a leftward force F <b> 2 is applied to the step platform 4. The step 4 moves leftward with respect to the roller 6. The step platform 4 moves leftward against the urging force of the spring 28. The board 50 supported by the lift pawl 36 together with the step platform 4 is also moving leftward. The roller 6 is located at the right moving end in the longitudinal direction of the shaft bolt 22.

  The operator may adjust the position of the board 50 in the left-right direction with respect to the base material 48 in the board pasting operation. In the state of FIG. 4A described above, when the board 50 is to be moved to the right, the operator pushes the step 4 with the foot in the right direction. The force F1 in FIG. 5B represents the force that the operator pushes with the foot. The step 6 moves right without changing the position of the roller 6 in contact with the floor 44. From the state of FIG. 5A to the state of FIG. 5B.

  By adjusting the amount by which the operator moves the step 4 to the right, the step 4, the board support 8 and the foot cover 10 are turned right between the state of FIG. 5A and the state of FIG. 5B. Can be moved to. In the state of FIG. 5B, the roller 6 is urged toward the center by the urging force of the spring 28.

  Similarly, when the board 50 is to be moved to the left in the state of FIG. 4A described above, the operator pushes the footrest 4 to the left with his / her foot. The force F2 in FIG. 5C represents the force that the operator pushes with the foot. The step 6 is moved to the left without changing the position of the roller 6 in contact with the floor 44. From the state of FIG. 5A to the state of FIG.

  By adjusting the amount by which the operator moves the step 4 to the left, the step 4, the board support 8 and the foot cover 10 are turned to the left between the state shown in FIG. 5 (a) and the state shown in FIG. 5 (c). Can be moved to. In the state shown in FIG. 5C, the roller 6 is urged toward the center by the urging force of the spring 28.

  In this way, the left-right position of the board 50 can be adjusted between the state of FIG. 5B and the state of FIG. At a predetermined left and right position, the operator steps on the step 4 backward. As shown in FIG. 4B, the board 50 is lifted. The board 50 is adjusted to a predetermined vertical position. The board 50 is attached to the base material 48.

  Here, an example has been described in which the vertical position is adjusted after the horizontal position of the board 50 is adjusted, but the horizontal position may be adjusted after the vertical position is adjusted. Further, the left and right position and the vertical position may be adjusted simultaneously.

  Since the left and right width W2 of the roller 6 is smaller than the left and right width W1, and the roller 6 is located at the center of the shaft bolt 22, it can be moved in any direction of the longitudinal direction of the shaft bolt 22. The roller 6 does not necessarily have to be positioned at the center of the shaft bolt 22. The roller 6 may be positioned to the right of the center of the shaft bolt 22 or may be positioned to the left as long as the roller 6 can move in any direction in the longitudinal direction.

  When the external force F1 is removed in the state of FIG. 5B, the roller 6 moves toward the center by the biasing force of the spring 28. When the external force F2 is removed in the state of FIG. 5C, the roller 6 moves toward the center by the biasing force of the spring 28. By providing the spring 28, when the external forces F1 and F2 are removed, the roller 6 is returned to a position where it can move in any direction in the longitudinal direction of the shaft bolt 22. By providing the spring 28, it is not necessary to manually return the roller 6 to a position where the roller 6 can be moved in any direction in the longitudinal direction of the shaft bolt 22 every use. From this point of view, the spring 28 may be urged toward the center when the roller is moved to the left and right as shown in FIG. 5B or 5C, and when the roller 6 is positioned at the center. May not be biased toward the center.

  The spring 30 only has to urge the roller 6 approaching the left and right moving ends toward the center. From this point of view, a leaf spring may be used instead of the spring 30 of the coil spring, a rubber string, a rubber cushion Etc. may be used.

2 ... Board lift up machine 4 ... Stage 6 ... Roller 8 ... Board support 10 ... Foot cover 12 ... Foot plate 14 ... Side plate 16 ... Front plate 18 ... -Shaft hole 20 ... Screw hole 22 ... Shaft bolt 24 ... Washer 26 ... Nut 28 ... Spring 30 ... Outer peripheral surface 32 ... Shaft hole 34 ... Board guide 36 ..Lift claw 38 ... screw 40 ... hanging plate 42 ... guide plate 44 ... floor 46 ... ceiling 48 ... base material 50 ... board

Claims (3)

It has a step that can be stepped on with a foot, a roller that is pivotally attached to the step, and a board support that supports the board.
A board support is fixed in front of this platform,
This roller rolls so that the platform can move in the front-rear direction,
The step and the board support part are rotatable with respect to the rotation axis of the roller.
This board support part has a lift claw that supports the lower surface of the board ,
The above step has a shaft,
The roller is attached to this shaft,
A board lift-up machine in which this roller is movable in the longitudinal direction of the shaft with respect to the platform . It has an elastic body,
2. The board lift-up machine according to claim 1, wherein when the roller is positioned at a moving end in the longitudinal direction of the shaft, the elastic body biases the roller in a position in which the roller can move in any direction in the longitudinal direction of the shaft. It has a foot cover located above the instep of stepping on the above step,
The board support part comprises a board guide facing the front of the board supported by the board support part,
The board lift-up machine according to claim 1 or 2, wherein the foot cover extends rearward from the board guide.

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