JPS6146397Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pinch roller device for moving and freely positioning the tip of one arm.

As shown in FIG. 1, which is a schematic front view, the conventional pinch roller device for arm driving has a saddle 2 supporting an arm 1 supported by a vertical mast 4 on a truck 3 so as to be able to rise and fall freely, and a chain 5 for example, to move the saddle 2 up and down. The vertical position of the arm 1 can be adjusted by adjusting the vertical position of the arm 1. 2, which is a partial cross-sectional view of FIG. 1;
As shown in the figure, the arm 1 is a horizontally long member with a total length of about 5 m, for example, and has a passage inside.To give an example, a repair material such as refractory brick powder is injected into the furnace together with flame from a nozzle 6 at the tip. It is designed to be sprayed onto the inner surface of the wall. The arm 1 also has two pairs of chain-driven pinch rollers 7 on the saddle 2;
8 in the longitudinal direction. The shaft of the lower roller 7 is supported by a fixed frame 10 on the saddle 2, and the shaft of the upper roller 8 is supported by a fixed frame 10 on the saddle 2.
The shaft is supported by a movable frame 11. The movable frame 11 is a member connected to the fixed frame 10 via a spring 12, and the spring 12 biases the roller 8 downward to move the roller 7,
8 is brought into pressure contact with the arm 1. However, according to the above-mentioned conventional product, when the arm 1 is to be removed for replacement or storage, the adjustment bolt 15 is operated to weaken the elasticity of the spring 12.
It is necessary to remove the nozzle 6 at the tip of the arm or the hose joint 16 for the supply line at the rear end and pull out the arm 1 from between the rollers 7 and 8 to the rear (to the right in Figure 2) or to the front. There are problems in that a long work space is required (long from front to back) and that removal work is time-consuming.

In order to solve the above-mentioned conventional problems, this invention
It is structured as follows.

That is, in the present invention, a pair of pinch rollers that grip an arm and drive it in the longitudinal direction are provided with their spindles perpendicular to the arm, and are movable on a fixed frame via a hinge having a spindle parallel to the arm. The ends of the frames are connected, one spindle of the pair of pinch rollers is supported by a fixed frame, the spindle of the other pinch roller is supported by a movable frame, and the movable frame is rotated around the hinge. The other pinch roller can be moved between the arm clamping position and the non-pinching position by moving the arm between the two pinch rollers. It is designed so that it can be removed in a direction perpendicular to the longitudinal direction.

Therefore, the arm can be removed, for example, to the side (in the radial direction of the arm) with the nozzle etc. still attached.

Further, in the present invention, a fixing mechanism is provided for fixing the movable frame in a state where the pinch roller occupies the arm clamping position, so that the arm can be reliably clamped by the pinch roller and moved in its longitudinal direction.

Next, embodiments will be described with reference to the drawings.

In FIG. 3, which is a vertical cross-sectional view, the fixed frame 20 on the saddle 2 has a pair of vertical side plates 21 and 22.
A lower pinch roller 26 is fixed by a key 27 to a shaft 25 supported by bearings 23 and 24 on both side plates 21 and 22. A sprocket 28 is fixed to the end of the shaft 25 protruding from the bearing 24 on the right side in FIG. 3, and the sprocket 28 is connected to a sprocket on the drive motor side via a chain (not shown).

The other pinch roller 30 is fixed to a shaft 31 parallel to the shaft 25 by a key 32 and is located directly above the roller 26. Bearings 33 and 34 that support both ends of the shaft 31 are attached to a pair of vertical side plates 36 and 37 of a movable frame 35.

Both frames 20 and 35 have brackets 39 and 40 that protrude laterally (to the right) than the sprocket 28.
The upper end of the bracket 39 and the lower end of the bracket 40 are rotatably connected by a hinge pin 41. Pin 41 is horizontal and axis 2
5 and 31 at right angles.

Both frames 20, 35 are also provided with brackets 42, 43 projecting laterally on the sides opposite to the pin 41. The upper bracket 43 rotatably supports the middle part of a vertically long rod 46 via a pin 45 parallel to the pin 41, as will be described later. It is equipped with a hook 48. As shown in FIG. 4, which is a cross-sectional view of FIG. 3, the bracket 43 consists of a pair of vertical plates, and pins 45 are fitted into cylinder bosses 49 fixed to both vertical plates. Each pin 45 is connected from the cylinder boss 49 to the other pin 45.
It protrudes to the side, and its protruding ends fit into holes at both ends of the horizontally extending boss 51. The boss 51 is provided with a hole 52 extending at right angles to the pin 45 in the middle thereof, and a rod 46 is slidably fitted into the hole 52. The rod 46 has a male thread 53 at the top.
A nut 56 to which a horizontal rod-shaped handle 55 is attached is screwed together, and a compression coil spring 57 is compressed between the nut 56 and the boss 51. rod 4
The upper part of the boss 58 is fixed to the lower end of the boss 5
A pin 47 is horizontally attached to the lower part of 8 so as to protrude to both sides. The bracket 42 is constructed by fixing a horizontal member forming a hook 48 to a pair of vertical plates, and the upper wall of the hook 48 is provided with a notch 59 into which a boss 58 is inserted.

As shown in FIG. 3, each pinch roller 26, 30 is a generally drum-shaped steel product having an outer circumferential surface 60, 61 with a concave arc-shaped cross section, and the widthwise central portion (the smallest diameter portion) of the outer circumferential surface 60, 61. are provided with annular grooves 62, 63 having a generally rectangular cross section. As shown in FIG. 5, which is a partial view of FIG. are provided at intervals in the circumferential direction. As shown in FIG. 6, which is an enlarged partial view of FIG. 3, a single rail-shaped guide 66 is attached to the outer peripheral surface of the arm 1 having a circular cross section, extending over approximately the entire length of the arm 1 and extending parallel to the center O of the arm 1. In the state shown in FIG. 6, the guide 66 is slidably fitted into the annular groove 63 of the upper roller 30.

As shown in FIG. 3, the side plates 22 of the rollers 26, 30,
Gears 68, 68' that mesh with each other are on the end face on the 37 side.
are in contact or fixed, and both gears 68, 68' are fixed to the shafts 25, 31 by the keys 27, 32, respectively.

Two sets of the above-mentioned mechanisms having a pair of rollers 26 and 30 are provided on a common saddle 2 as in the case of FIG. It's becoming like that.

In the state in which the pin 47 in FIG. 3 is engaged with the hook 48, the spring 57 urges the movable frame 35 downward via the pin 45, etc., and the roller 30 pushes the arm 1 downward due to this urging force. There is. In this state, when the shaft 25 is rotated by a motor (not shown) via the chain or sprocket 28, the roller 26 rotates and the gear 6
The rollers 26, 30 are rotated in the opposite direction via the rollers 8, 68', and both rollers 26, 30 hold the arm 1 by frictional force and move the arm 1 forward (toward the front side of the paper in FIG. 3) or backward. When the arm 1 moves forward or backward to a predetermined position, the motor automatically (or manually) stops. Since the guide 66 shown in FIG. 6 fits into the groove 63 during the above-mentioned movement and in the stationary state before and after the movement, the arm 1 does not rotate about its center O.
The nozzle 69 at the tip of the arm is kept facing, for example, to the left in FIG. 6, and always sprays repair material, etc. in a constant direction as indicated by arrow A.

Operations such as reversing the direction of the nozzle 69 and replacing the arm 1 are performed as follows. First, loosen the nut 56 using the handle 55 shown in FIG.
Release the compression force, lower the rod 46 slightly and
Tilt the rod 46 around the pin 45 as shown by the two-dot chain line in the figure, and remove the pin 47 from the hook 48. Next, the movable frame 35 is raised around the hinge pin 41 by a suitable drive mechanism, and the roller 30
is moved upward to widen the gap 70 at the left end in FIG. 3 between the rollers 26 and 30. In this state, the arm 1 is removed laterally through the gap 70, and a new arm 1 or a repaired arm 1 is attached in the reverse order to complete the replacement work. In order to change the direction of the nozzle 69, the arm 1 is rotated 180 degrees with the roller 30 moved upward as described above, and the guide 66 is fitted into the groove 62 of the lower roller 26. Next, move the roller 30 downward in the reverse order of the lifting procedure, and arm 1
When the nozzle 69 is brought into pressure contact with the nozzle 69, the direction changing operation is completed, and thereafter the nozzle 69 is held in the rightward position in FIG.

As explained above, according to the present invention, arm 1
A movable frame 35 connected to the fixed frame 20 via a hinge pin 41 is provided with a pair of pinch rollers 26 and 30 that pinch and drive in the longitudinal direction.
By supporting one pinch roller 30 and moving the movable frame 35 using the hinge pin 41 as a fulcrum, the pinch roller 30 can be moved between the arm clamping position (lowered position) and the non-pinching position (raised position). At the same time, a fixing mechanism (rod 46, hook 48, spring 57, etc.) that can fix the movable frame 35 at the arm clamping position is provided.
The roller 30 can be easily moved to the non-clamping position, and this movement allows the arm 1 to be removed, for example to the side, with the nozzle 69 etc. still attached.
Therefore, the arm 1 can be easily removed or attached during replacement or storage.

Also, as in the illustrated embodiment, the arm 1 is provided with a guide 66.
At the same time, if grooves 62 and 63 are provided in the rollers 26 and 30 into which the guide 66 enters, the angular position of the arm 1 in the circumferential direction (direction of the nozzle 69) can be adjusted.
By combining such a guide mechanism with a structure capable of raising the roller 30 as described above, it is possible to easily change the direction of the nozzle 69.

Note that the present invention can be used for driving other than the furnace wall repair arm, for example, the present invention can be applied to a device for driving a paint spraying pipe or a machine tool arm.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the conventional example, Fig. 2 is a partial cross-sectional view of Fig. 1, Fig. 3 is a vertical sectional view of the embodiment of the present invention, Fig. 4 is a cross-sectional view of Fig. 3, and Fig. 5 is a schematic front view of the conventional example. The figures are a partial view of FIG. 3 in the direction of the - arrow, and FIG. 6 is an enlarged partial view of FIG. 3. 1...Arm, 20...Fixed frame, 26,
30... Pinch roller, 35... Movable frame, 41... Hinge pin, 46, 47, 57...
Rod, hook and spring (fixing mechanism).

Claims (1)

[Scope of utility model registration request] A pair of pinch rollers that pinch the arm and drive it in the longitudinal direction are provided with their spindles perpendicular to the arm, and the end of the movable frame is attached to the fixed frame via a hinge having a spindle parallel to the arm. By connecting the pair of pinch rollers, one spindle of the pair of pinch rollers is supported by a fixed frame, the spindle of the other pinch roller is supported by a movable frame, and the movable frame is rotated about the hinge. The other pinch roller is movable between the arm clamping position and the non-pinching position, and when the other pinch roller is in the non-pinching position, the arm is moved between the pinch rollers at right angles to the longitudinal direction of the arm. What is claimed is: 1. A pinch roller device for driving an arm, comprising a fixing mechanism for fixing a movable frame in a state in which the pinch roller occupies an arm clamping position.