JPH07156092A - Multistage expansion arm device - Google Patents

Abstract

PURPOSE:To exceedingly lower the whole initial height of a multistage expansion arm device by attaching a cylinder to each arm at respective stages, and assembling this multistage expansion arm device. CONSTITUTION:Four arms 10, 20, 30 and 40 at each stage are insertionally fitted thereinto free of expansion or contraction. Each of side plates 33 and 43 are welded to these arms 10, 20, 30 and 40 at each stage, while a fixed boss 36 is fixed each to respective arm outer wall upper sides at each stage, and an axial hole is installed in a fixed boss of the forefront arm 10. A tip at the rod side of a cylinder is inserted into this axial hole and clamped tight. A rear seat plate of this cylinder is clamped and fixed to a mounting hole installed in a side plate of the second arm. With this constitution, the fixed boss and this side plate are connected to each other by the cylinder. Likewise, the fixed boss of the second arm 20 and the side plate 33 of the third arm 30 and the fixed boss 36 of the third arm 30 and the side plate 43 of the base stage arm 40 are all connected to one another through the cylinder 4. These cylinders 4 are arranged in the same direction as one side in the section of each inter diameter of these arms 10, 20, 30 and 40 at each stage. In this connection, each slide rail is assembled in these four arms 10, 20, 30 and 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a multi-stage telescopic arm device in which arms having the same cylinder are combined in a plurality of layers.

[0002]

2. Description of the Related Art Since a conventional multi-stage telescopic boom is intended to be applied to a crane or the like, the structure of the boom tube is rigid and strength is required. In order to hang it, it was necessary to use a hydraulic cylinder to withstand heavy pressure, and there were restrictions on the boom structure in order to firmly hold the cylinder.

[0003]

In the conventional multi-stage telescopic boom, a special hydraulic cylinder is used to incorporate the telescopic cylinder in the boom, and a normal one-side piston lot type commercially available cylinder is used. Therefore, it was not possible to arrange many identical things in the same state. (See, for example, JP-A-57-73207)

From the above problems, how many cylinders can be easily incorporated is a problem, and it is a problem whether a commercially available ordinary cylinder is easily incorporated.

[0005]

The multistage telescopic arm device (simply referred to as a device) of the present invention is devised in the arm tube body in order to solve the above problems, and in this apparatus, one side of each arm tube body is used. On the other hand, on the other hand, there is a space on each side for mounting the cylinder on each side, and when viewed from the axial cross section, the cylinder is attached to the center and the slide rails are attached to the left and right ends. The layers are stacked and inserted, and the arms of each of the layers can be assembled gradually with the cylinder already attached. Therefore, the cylinder is of the one-sided piston lot type. It can be used and easily installed.

[0006]

In the device of the present invention, since the structure of the arm is as described above, it is possible to combine the arms of 10 stages or more, and a normal cylinder of a one-sided piston lot which is commercially available is used as the device. Can be used with a slight modification, and the same cylinder can be easily assembled in the same state, and a pneumatic cylinder / hydraulic cylinder, or a motor-operated linear operation unit can also be applied.

In this apparatus, when a load is suspended at the tip, a momentum due to a cantilever load acts on the arm, and a slide rail is used to move the arm against this. , Outer rail (a) / middle rail (b) / inner rail (c). Rollers or balls, etc. are built inside, and slide them by combining them between each arm, and the arm extends to the maximum extent. Even when
Since the slide rail is a composite type, more than half of the total stroke length is configured to engage with the rails and receive the load.

In the device of the present invention, as described above, the cylinder is firmly held in each boom, and ascends together with the boom. Therefore, the conduit to be connected to the cylinder requires a device that does not loosen. In this device, the cord reel is used as shown in (Fig. 2), and the tension is constantly kept. Therefore, the conduit is a flexible tube such as a rubber hose.

If the above-mentioned cord reels are used for piping for each cylinder, the cylinders can be operated individually, and the pneumatic cylinder can also be stopped at each stage by an intermediate stop. In the case of a cylinder, an intermediate stop can be made arbitrarily, and in a device with a boom of 10 steps or more, a cord that can branch each pipe of each cylinder and expand and contract individually with a nearby cylinder without using a cord reel at all. The use of the conduits or conductors can simplify the piping inside the equipment.

[0010]

EXAMPLES Examples will be described with reference to the drawings.
In FIG. 1, the first arm (10) and the second arm (20)
The third arm (30) and the base arm (40) are telescopically inserted, and the side plate (13) is attached to each arm.
(23), (33) and (43) are welded, and fixing bosses (16), (26) and (36) are fixed near the outer wall of the arm of each step. 1
6) is provided with a shaft hole (17). The tip (3) of the cylinder on the lot side is inserted and fixed in the shaft hole (17), and the rear seat plate (5) of the cylinder is the same as described above. The fixing boss (16) is fixed by tightening a bolt in a mounting hole formed in the side plate (23) of the second boom.
And the side plate (23) are related to each other to connect the cylinders, and also (26), (33), (36) and (43) are related to each other, and the cylinders are connected to each other. It is arranged in the same direction on one side in the cross section of the arm inner diameter.

In order to assemble the present apparatus, the cylinder is previously fixed to each stage arm by the above-mentioned method, then the base stage arm (40) is fixed to a predetermined position of the base (50), and the base is previously set. The cord reels (61) and (62) are attached to the stand (50), the third arm (30) is inserted in front of the base arm (40), and the shaft hole (37) of the fixing boss of the arm is inserted. )
Insert the lower cylinder lot end (2) into the cylinder and lock it with the W nut (3) to prevent it from loosening. Also, place the elbow joints (6) and (7) on the cylinder by screwing, respectively. The conduit is inserted into this, and similarly, the second arm (20) and the preceding arm (10) are inserted and assembled.

To assemble the slide rails, as shown in FIG. 3, the outer rails (42-a) are fixed to the left and right sides of the base arm (40) in advance, while the third arm (3) is attached.
The inner rails (42-c) are fixed to the left and right sides of the outer surface of (0) via the support members (35), and the slide rails are fixed to the inner surfaces of the other arms in advance, and the respective arms (42-c) are fixed. 30), (20), and (10) in that order, and after adjusting the respective support tools (35), (25), while adjusting.
(15) is fixed, and if necessary, a flat roller bearing (41) is provided above the opposite surface of the arm.
(31) (21) or the like is used, and the arms are joined to the middle of each layer and combined.

[0013]

Since the present invention is constructed as described above, it has the following effects.

The present invention cannot be applied to heavy machines such as cranes due to the weak arm structure, but can be applied to industrial lifters, elevators for transportation, telescopic arms of robots, and so on. It can contribute to a large amount of demand as power equipment for labor-saving machines that are expected to develop.

In addition, since the size of this device when it is maximally reduced can be reduced to a composite by the total thickness of the bottom plates of the booms, the initial height of the entire device is extremely low, so it can be used as it is for lifting lifters. it can.

[0016]

[Brief description of drawings]

FIG. 1 is a front view when fully extended according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of the present invention at the time of reduction.

FIG. 3 is a cross-sectional view taken along the line XX of FIG.

FIG. 4 is a front view according to another embodiment of the present invention.

[Explanation of symbols]

 1 head 2 cylinder W nut 4 cylinder 5 same rear seat plate 10, 20, 30, 40 arm tube body 13, 23, 33, 43 arm side plate 22, 32, 42, slide rail 50 base 60 robot vertical column

Claims (5)

[Claims] 1. The arm is a tubular body that is enlarged in the order of the first stage, the second stage, the third stage, and the base stage, and the bottoms of the cylinders are inserted with the paces of the cylinders opened, respectively, and fixed to the front outer wall of the bottom side. Boss (1
6) (26) and (36) are fixed to each other, side plates (13), (23), (33) and (43) are welded to the other ends, and the tip of the cylinder lot is fixed to the fixing boss (16). A shaft hole (17) to be inserted is bored, and a bolt hole (24) for fixing the seat plate of the cylinder is bored in the shaft hole and the second arm side plate (23) which is horizontally below. Installation boss (16)
And the side plate (23) interact to bind the cylinder,
Also, (26), (33), (36), and (43) are related to each other to connect the cylinders, and when viewed from the axial cross section, slide to the left and right ends below the inner wall of the base arm (40). The outer frame (a) of the rail (42) is fixed, and on the other hand, the third
The inner rail (b) of (42) is fixed to both ends of the arm (30) on the lower side of the outer wall via a supporting tool so as to be integrated, and similarly, each arm (30) and (20) (20) ) And (1
The slide rails (32) and (22) are respectively incorporated in (0), and in the above-mentioned structure,
It is a multi-stage telescopic arm device. 2. The multi-stage telescopic arm according to claim 1, wherein each arm has an axial section formed of a rectangular tube, and a linear movement unit driven by a motor is assembled instead of the cylinder device. apparatus. 3. The multi-stage telescopic arm device according to claim 1, wherein each arm is a tubular body having a circular or elliptical cross section. 4. A first arm, a second arm, a third arm and a plurality of arms, each of which has a base arm at its end, and each arm has a rectangular, circular or oval cross section. It is comprised, or was comprised with a flat plate and shape steel.
The described multi-stage telescopic arm device. 5. The multi-stage telescopic arm device according to claim 1, wherein linear actuators such as cylinders are arranged on opposite sides of each other, or on four sides or in various directions.