JP2806402B2 - lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device used for mounting ceiling equipment such as air conditioners, ducts, piping, and lighting equipment on a ceiling.

[0002]

2. Description of the Related Art For example, the following is known as a lifting device for lifting ceiling equipment to the ceiling. One of them is a so-called upper as shown in FIG. 8, in which an article mounting table 21 is attached to a frame 1 movable on a floor via a lift cylinder 23 which is operated by gas pressure of carbon dioxide or the like in a cylinder 22. The main purpose is to lift lightweight ceiling equipment in duct work and the like. The other is a chain block which is used by being attached to a hook fixed to a ceiling slab. It is also conceivable to employ an articulated robot used in an automobile assembly line or the like.

[0003]

However, in the case of using the upper, since the lifting is performed by the driving force, it is difficult to finely adjust the lifting speed. Had the disadvantage of taking time. On the other hand, in the case of using a chain block, the lifted object to be lifted is swung back and forth and left and right by human power to adjust the front and rear and left and right positions of the alignment.
Since the object to be lifted tries to return to the original position by its own weight, there is a disadvantage that it takes time to adjust the front / rear and left / right positions. Moreover, since the object is lifted, the object to be lifted cannot be lifted to or near the lower surface of the slab. In order to lift the object to be lifted to or near the lower surface of the slab, manual lifting is required. . Also, when using a multi-joint robot, the lifting weight of the robot is about 10% of the weight of the robot itself, so the robot becomes large and heavy, and handling in loading and unloading to the site is difficult. Implementation was almost impossible. SUMMARY OF THE INVENTION An object of the present invention is to provide a lifting apparatus which can lift and lower an object to be raised and lowered with good workability, is easy to handle, and is useful for installing ceiling equipment.

[0004]

A feature of the lifting apparatus according to the present invention is that the object to be lifted is horizontally or horizontally mounted on a movable base.
An elevating arm with a holding part that can be held almost horizontally is swingably mounted around the horizontal axis, and an arm that swings up and down reciprocally with respect to the elevating arm is attached to the arm for balance adjustment. The point is that the weight is mounted so as to be freely changeable in the longitudinal direction of the arm, and balance adjusting means for adjusting the position of the weight is provided. And, of the gantry, a lifting arm and an arm mounting portion for pivotally supporting the arm are rotatably mounted on a gantry main body around a vertical axis, and a mounting table for mounting an object to be raised and lowered is provided as the holding portion. Attached to the lifting arm so that it can swing around the second horizontal axis,
It is preferable that a horizontal maintaining means is provided for swinging the mounting table around the second horizontal axis so that the mounting table is maintained in a horizontal posture as the lifting arm swings up and down. Furthermore,
The balance adjustment means is a means for changing the position of the weight by the actuator, and in addition, the operation of the actuator is stopped based on the fact that the balance adjustment means has started to move up and down the holding unit with the change in the position of the weight. It is preferable to provide a control circuit for performing the control.

[0005]

According to the above-mentioned characteristic configuration, the object to be lifted can be moved up and down in a horizontal or almost horizontal state by swinging the elevating arm or the arm while the object to be lifted is held by the holding section. Then, by changing the position of the weight by the balance adjusting means, it is possible to adjust the moment due to the weight of the weight around the horizontal axis of the swinging system including the lifting arm and the arm. Therefore, by adjusting the moment around the horizontal axis center due to the weight weight to be the same as or close to the moment around the horizontal axis center due to the lifting / lowering object weight held by the holding section, the holding section can be operated with a small operating force. Can be raised and lowered.
More specifically, when raising and lowering the object, the moment around the horizontal axis due to the weight of the weight is adjusted to be equal to or slightly larger than the moment around the horizontal axis due to the weight of the object to be raised and lowered. In addition, the object to be lifted can be lifted with little or no human power, and the vertical position can be adjusted by manual power. On the other hand, when lowering the elevating object, the moment around the horizontal axis center due to the weight is calculated as
By adjusting the moment about the horizontal axis center by the weight of the lifting object to be the same or slightly smaller, the lifting object can be safely lowered with a small amount of human power or without using any human power. In addition, since the lifting arm is mounted on a movable base, the front / rear / left / right position can be adjusted while the weight of the object to be lifted is supported by the base by moving the base. The position can be easily adjusted. In particular, when the arm mounting portion of the gantry is rotatable around the vertical axis, the holding portion, that is, the object to be raised and lowered can be moved in the horizontal direction by the rotation of the arm mounting portion. Compared to the case of moving the holding part in the horizontal direction,
The mass of the object to be moved can be small, the operation force can be small, and the adjustment of the front / rear / left / right position by human power can be performed more easily. Further, when the holding section is a mounting table that is held in a horizontal posture by the horizontal maintaining means, the object to be lifted and lowered can be raised so as to contact the lower surface of the slab on the ceiling. When a means for changing the position of the weight by an actuator is provided as the balance adjusting means, the balance can be adjusted quickly. In addition, when a control circuit is provided, when the holding unit is lifted, the weight of the weight is reduced. Is slightly larger than the moment around the horizontal axis due to the weight of the holding part.
In addition, when the holder is lowered, the moment around the horizontal axis due to the weight of the weight can be automatically adjusted to be slightly smaller than the moment around the horizontal axis due to the weight of the holder.

[0006]

As described above, according to the present invention, an object to be lifted and lowered can be lifted and lowered with good workability by human power, and it can be made small and lightweight because of human power and easy to handle. It is possible to provide a useful elevating device when lifting to the installation part.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a lifting device is used for installing ceiling equipment such as air conditioners, ducts, piping, and lighting equipment, and moves on a floor surface FL. An elevating arm 2 having a holding part B for an elevating object A such as ceiling equipment is mounted on a freely mountable base 1 so as to be swingable about a horizontal axis X, and swings reciprocally with respect to the elevating arm 2. It has a basic structure to which an arm 3 is attached. In other words, the vertical movement of the vertical movement of the vertical movement of the vertical movement arm X around the horizontal axis X in the state where the vertical movement of the vertical movement target A is held by the holding section B is configured. As shown in FIG. 3, the gantry 1 includes a gantry main body 1A including wheels 1a (caster wheels or the like) that can be changed in direction to move on a floor surface FL, and a vertical axis on an upper portion of the gantry main body 1A. And an arm mounting portion 1B rotatably mounted around the core Y. The gantry body 1A is configured such that an upper bracket 1Ab that pivotally supports the arm mounting portion 1B via a thrust bearing 1b is detachably connected to a lower body 1Aa. The elevating arm 2 is pivotally supported by the arm mounting portion 1B in a state where the horizontal axis X crosses the vertical axis Y. The arm 3 is integrally connected to the base end of the lifting arm 2, and a handle 4 for swing operation is attached to the arm 3. The holding part B
A base 5 attached to the tip of the lifting arm 2 so as to be swingable around a second horizontal axis X ₂ parallel to the horizontal axis X;
A mounting table 7 which is detachable from the base 5 via bolts 6;
Two detachable two-point suspension hooks 9 via bolts 8 at left and right spaces of the base 5;
And a single point hook 11 that can be attached and detached via bolts 10 at the left and right central locations. That is, as shown in FIG. 2A, only the mounting table 7 is attached to the base 5 and the object to be lifted is mounted on the mounting table 7, and as shown in FIG. , Only two hooks 9 for hanging
And a two-point hanging form in which the object A to be lifted is suspended and supported by a two-point hanging hook 9 as shown in FIG.
The single-point hanging hook 11 is attached to the base 5 so that the object A can be switched to a single-point hanging mode in which the object A is suspended and supported by the single-point hanging hook 11. In addition, the elevating device includes a horizontal maintaining unit, a weight 12 for balance adjustment, and a balance adjusting unit. The horizontal maintaining means,
A posture controlling link 13 is attached to the arm mounting portion 1B and the base 5 so as to be positioned parallel to the elevating arm 2, and the base 5 is raised and lowered by pushing and pulling by the link 13 as the elevating arm 2 moves up and down. 2 for the second horizontal axis X
_This is a means for maintaining the mounting table 7 attached to the base 5 in a horizontal posture by swinging it around. Weight 1
As shown in FIG. 4, 2 is attached to the arm 3 via a guide 14 having a U-shaped cross section so as to be freely changeable in the longitudinal direction of the arm. The balance adjusting means adjusts the position of the weight 12 and adjusts the moment due to the weight of the weight 12 around the horizontal axis X of the swinging system including the lifting arm 2 and the arm 3. That is,
Swinging by the weight of the weight 12 rather than the moment about the horizontal axis X of the swinging system due to the weight of the holding part B (including the weight of the lifting and lowering object A when the lifting and lowering object A is held) The holding portion B is raised by increasing the moment about the horizontal axis X of the system, and the holding portion B is lowered by reducing the moment. In particular,
In a state in which the weight 12 is screwed to the weight 12 and is attached to the arm 3 in a posture along the arm longitudinal direction so as to be rotatable at a fixed position via a bearing 15, and the weight 12 is moved by rotating forward and backward, The feed screw 16 includes a feed screw 16 for fixing the position when the rotation is stopped, a motor (an example of an actuator) 17 for rotating the feed screw 16 forward and reverse, and a control circuit 18. First, an input system of the control circuit 18 will be described. As shown in FIG. 5, an up switch US for raising the holding unit B, a down switch DS for lowering the holding unit B, and And a sensor S using a mercury switch for detecting that the sensor S is located at the position. Then, the control circuit 18 stops the operation of the motor 17 based on the fact that the holding unit B starts moving up and down with the position change of the weight 12. Specifically, the motor 17 is operated in the forward direction so that the weight 12 moves toward the tip of the arm by the on operation of the lift switch US, and the sensor S is operated to detect the motor 17 in that state.
Is stopped, and the motor 17 is rotated in the reverse direction so that the weight 12 moves toward the base end of the arm by turning on the down switch DS.
Is to stop the reverse rotation operation of the motor 17 by the detection operation. According to the elevating device, although the elevating object A is raised by a difference between the two moments,
Since the difference between the two moments is small and the swinging system is in a state close to the equilibrium state, the holding portion B can be smoothly lifted and operated by a small amount of human power. When the object A is ceiling equipment, vertical positioning with respect to the installation position of the ceiling equipment can be easily, quickly, and accurately performed by human power. 1
9 is a cover. C is a lifter on which an equipment installation worker rides when the object A to be lifted is ceiling equipment.

[Alternative Embodiment] [1] In the above-described embodiment, the means using the operating force is shown as the balance adjusting means. However, instead of the motor 17, the feed screw 16 shown in the embodiment is used as the balance adjusting means.
It may be a manually operable means, such as providing a handle for rotating the. [2] In the above embodiment, a motor is shown as the actuator 17, but the actuator 17 may be a cylinder that operates by air pressure, hydraulic pressure, or water pressure to directly operate the weight 12. [3] In the above embodiment, the operation of the actuator 17 is automatically stopped, but may be manually stopped. [4] In the above embodiment, the arm 3 is integral with the lifting arm 2, but the arm 3 is interlocked with the lifting arm 2 via the gear 20, as shown in FIGS. It may be. The lifting arm 2 shown in FIG.
The swing amount of the arm 3 is the same as that of the arm 3. The arm shown in FIG. [5] In the figure, an example of use for lifting the ceiling equipment is shown.
It can be used for raising and lowering. [6] For indoor use such as lifting of ceiling equipment, a sensor for detecting the distance from the ceiling or floor is attached to the lifting arm 2 or the holding part B, and the holding part is detected based on the detection of the sensor. When the distance from the ceiling or floor of B becomes the set distance, the brake device for swinging may be operated to avoid collision with the ceiling or floor, or to reduce the impact. . Examples of the sensor include an infrared sensor, an ultrasonic sensor, and a contact sensor.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view

FIG. 2 is a perspective view of a main part.

FIG. 3 is a plan view

FIG. 4 is a sectional view

FIG. 5 is a block diagram.

FIG. 6 is a side view of a main part showing another embodiment.

FIG. 7 is a schematic side view showing another embodiment.

FIG. 8 is a side view showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base A lifting target 2 lifting arm 3 arm 12 weight 1A base body 1B arm mounting part 7 mounting table 17 actuator B holding part

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasuyuki Nishi 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Takenaka Corporation Osaka Main Store (56) References JP-A-49-26958 (JP, A Japanese Patent Publication No. 49-422139 (JP, B1) Japanese Patent Publication No. 48-29940 (JP, B1) Japanese Utility Model Publication No. 49-38864 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B66F 19/00

Claims (5)

(57) [Claims] 1. A lifting / lowering arm (2) provided with a holding portion (B) capable of holding an object (A) horizontally or substantially horizontally on a movable frame (1) around a horizontal axis (X). And an arm (3) that swings up and down reciprocally with respect to the elevating arm (2), and a weight (12) for balance adjustment is attached to the arm (3) in the longitudinal direction of the arm. The position can be freely changed and its weight (1
An elevating device provided with balance adjusting means for adjusting the position of 2). 2. An arm mounting portion (1) of the mount (1) for pivotally supporting a lifting arm (2) and an arm (3).
B) is rotatable around the vertical axis (Y).
2. The lifting device according to claim 1, wherein the lifting device is attached to A). As claimed in claim 3, wherein the holding portion (B), mounted pivotably for mounting thereon the lift target object (A) table and (7) to the second horizontal axis (X2) around the lifting arm (2) Horizontal maintaining means for swinging the mounting table (7) around a second horizontal axis center (X2) so as to maintain the mounting table (7) in a horizontal posture as the lifting arm (2) swings up and down. The lifting device according to claim 1 or 2, further comprising: 4. The lifting device according to claim 1, wherein said balance adjusting means is means for changing the position of the weight by an actuator. 5. The apparatus according to claim 1, wherein the balance adjusting means includes a weight (1).
The lifting device according to claim 4, further comprising a control circuit (18) for stopping the operation of the actuator (17) based on the start of lifting and lowering of the holding unit (B) in accordance with the position change of (2).