JPS58201039A - Device for detecting abnormal torque - Google Patents

Abstract

PURPOSE:To detect abnormal torque and to open/close the door of a household Buddhist altar electrically by detecting the loosening of a chain engaging a driving chain wheel with a driven chain wheel. CONSTITUTION:The turning force of the driving chain wheel 3 is transmitted to a driven chain wheel 2 through a chain 4, the chain 4 is pressed to the inside from both the sides by a chain slipper 5 fixed on a board 1 at a fitting part 6 and the chain slipper 5 is pressed from the outside by a spring 7. Since the forward end of the spring 7 is separated from a tentacle 10 of a microswitch 9, the rotation of the chain wheel 3 in the clockwise direction causes the upper side of the chain to be strained and straightened when a fault is generated on the side of the chain wheel 2, so that the chain slipper 5 and the spring 7 are pressed to the outside to press the tentacle 10 of the switch 9, and a motor 11 is stopped. If the gear transmitting shaft (unshown) of an altar door actuating means is engaged with the transmission shaft 23 of the abnormal torque detecting device, doors A-D are simultaneously opened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for mechanically detecting abnormal torque generated on the side of a rotating shaft, and also relates to a device that allows the rotating shaft to idle even during periods when equipment is stopped.

First, the origin of the present invention will be described. The applicant is primarily involved in the development of opening/closing devices for large Buddhist altars, and would like to briefly describe the circumstances that led to the present invention.

Figures 1 and 2 are from the applicant's Utility Application No. 55-17393.
5. The name of the invention is related to "Buddhist altar door opening/closing device", and the first
In the figure, curved holes (33) are symmetrically bored in the ceiling plate (32) of the Zushi (31) of the Buddhist altar, which has a semi-cylindrical surface.
Four-part Kannon doors A, B, and C.

A and B1 of D, C and D are hinge-engaged, respectively, and the floating rod (34) provided at the end of door B is connected to the curved hole (33).
It penetrates through and protrudes above the ceiling board (2).

An operating mechanism (35) provided at the rear center of the ceiling plate (32)
) The two telescoping arms (6) c's engage with the floating rod (34) and open and close the door B1 and the door A via the hinge according to the forward and reverse rotation of the telescoping arms (36).

The same applies to doors C and D.

Figure 2 shows the contents of the device, in which gears (3
A telescopic arm (36) is fixed to each of 8) and (39), and rotates in the opposite direction N according to the rotation of the two meshing gears (38) and (39). Telescopic arm (3
6) may be of a commonly used structure.

One of the gears, for example, the upper side of the gear (38), has a lead disk (40) fixed thereto having a groove on its outer periphery, and makes the same rotational movement as the gear (38).

An operation box (41) is installed on the outside of the Buddhist altar, and its stand (42)
) is another lead disk (43) which is pivoted on the handle (4
A thin stranded steel wire (4, 5) is engaged through the protective tube (46), and the stranded steel wire (45)
is fixed to each lead disk by a stopper (47) of the lead disk (40) and a stopper (48) of the lead disk (43).

With this configuration, if you turn the hand "': 44) 8 of the operation box (41) on the outside of the Buddhist altar in the direction of the arrow in Figure 2, the gear (
38) and (39) also operate to open the door by rotating in the direction of the arrow shown in the figure, and close the door by turning the handle (44) in the opposite direction.

The applicant has further disclosed a device in Utility Model Application No. 55-186259, titled ``Electric Buddhist altar door opening/closing device,'' which is combined with the operation box (41) to open and close the door using a motor as power.

Furthermore, the invention of the operation box (41) with an H speed reduction device was published in Utility Patent Application No. 55-186258, and the invention was published in Utility Model Application No. 56-099557i as a lightweight and small operation box, and the power derived from the reciprocating motion ζ of thin stranded steel wire. An application was also filed on April 16, 1981, for one in which rotary motion is transmitted by a flexible shaft instead of transmission.

Despite these ideas, the following requirements are still being made for semi-cylindrical zushi doors that open in four parts.

(1) A direct electric opening/closing device that does not require an operation box outside the Buddhist altar.

(2) When using the opening/closing device, ensure that the door closes and opens securely. If possible, it would be even better if it could be retightened.

(3) In the event of a power outage or other accident, the door can be easily opened and closed manually.

An object of the present invention is to provide a Buddhist altar door opening/closing device equipped with an abnormal torque detection device that eliminates the drawbacks of the prior art described above and satisfies the various conditions currently required, and to present a wide range of applications thereof.

In short, the present invention detects abnormal torque by detecting the amount of slack in the chain that engages the driving chain wheel and the driven chain wheel.

The present invention will be explained based on embodiments and with reference to the drawings.

FIG. 3 is a perspective view of one embodiment. The driven chain wheel (3) and the driving chain wheel (2), which are pivotally supported on the stand (1), are engaged with each other by a chain (4) with some slack, and the attachment part (6)
) and is pressed by chain slippers (5) that press from both sides of the chain (4), and is fixed to a spring stand (8) that is fixed to the stand (1).
) is provided with a spring (7) that presses the tentacle of the microswitch (9) when the chain (4) is tensed.

The drive chain wheel (3) rotates forward or reverse by the forward and reverse rotation of the motor 0), and the driven chain wheel (2) is rotated forward or reverse via the chain side, and the transmission shaft (23) of the driven chain wheel (2) # A pole friction clutch α2 is interposed here, and engages with the transmission shaft (49) of the gear (38) shown in FIG. 2.

5- Add the components of the pole friction clutch (12) to the fourth
The assembly diagram is shown in FIG. A coil spring θ6) is inserted into the inner cylinder α3) which has a hole α that houses the coil spring α6).
Push the balls (17) into both ends, insert into the outer cylinder (1 (a)) which has a small hole (18) that prevents the ball from protruding, and insert the inner cylinder (13) and outer cylinder a4 into the The shaft (23) is fixed.

Next, this effect will be explained. FIG. 7 shows the operating situation in normal forward rotation or reverse rotation.

In other words, the rotational force of the driving chain wheel (3) is transmitted to the driven chain wheel (2) via the chain (4), and at this time, the chain slippers are fixed to the base (1) from both sides of the chain with the attachment parts (6). (5) is pressed inward by a spring (force) provided on a spring base (8) fixed to a base (11) from the outside of the chain slipper (5), and the tip of the force is applied to a micro switch. It is separated from the tentacle 00) of (9).

Figure 6. When the driving chain wheel (3) is rotating clockwise as shown in the figure, if an abnormality occurs on the driven chain wheel (2) side, as shown in the figure (Kochii Herring (4) The upper part of the diagram is taut and almost straight, so the chain slipper (
5) and spring (7) all outward, micro 6
- Press the tentacle of the switch (9a), and the motor 01) stops due to the action of the switch.

Figure 8 is an explanatory diagram showing a case where, contrary to Figure 6, abnormal torque is generated on the driven chain wheel side when the driving chain wheel (3) and the driven chain wheel (2) are rotating counterclockwise. ing.

Now, as mentioned before, the gears (
The case where the transmission shaft (49) of 38) and the transmission shaft (23) of the abnormal torque detection device of the present invention are engaged will be explained.

First, when the driven chain wheel (2) rotates clockwise as shown in FIG. 6, the gear (38) in FIG. 2 rotates clockwise as indicated by the arrow in the figure. Therefore, the telescoping arm (36) also moves clockwise, so doors C and D in FIG. 1 perform an opening movement. Since the gear (39) meshing with the gear (38) rotates in the opposite direction, the doors A and B also perform simultaneous door opening movement.

When the floating rod (34) of door C reaches the end of the curved hole (33), it cannot move and the transmission shaft (
4-9)? This abnormal torque is transmitted to the transmission shaft (23),
The driven chain wheel (2) is stopped and becomes the state shown in FIG. 6, and the motor (11) is stopped by the action of the microswitch (9a).

There is no need to explain that when closing the door, the same operation as above is used.

I would like to add some explanation about the parts used in this invention. As for the Suchen slipper (5), it is possible to press the chain (4) directly with the spring (force), but if you look at the details, the movement of the chain (4) is the movement of individual chains, so it is not continuous. Therefore, the chain slipper (5
), thereby preventing the tip of the spring (force) from vibratingly pressing the tentacle (10) of the microswitch (9).

There is no need to say too much about the pole friction clutch 02) in Figure 5, but it depends on the size of the ball α force, the strength of the coil spring (I□□□, and the small hole 08 in the outer cylinder α). The structure is such that a torque within a certain range can be transmitted, but if the torque is larger than the specified value, it will cause sagging.

Therefore, if the door cannot be opened or closed at a Buddhist altar using this device due to a power outage or other reasons, if you move the door manually, the pole friction clutch (121) will idle, so you can easily open and close the door manually. can be done.

According to the present invention, the above requirements are satisfied and (
1) The electric trowel door can be opened and closed directly without the need for an operation box outside the Buddhist altar, and (2) A floating rod (34
) comes into contact with the end of the curved hole (33) and the chain (4) is retightened until it becomes straight, and (3) it can be opened and closed manually in the event of a power outage or other accident, which has a remarkable effect.

Now, the origin of the present invention was certainly an opening/closing device used in the world of Buddhist altars. Therefore, for example, the thickness of the stand (1) is extremely small (length: 7 cm, width: 4 r/n, height: 2.5 cm), and the chain (4 ), as shown in Figures 9 and 10, a chain wheel 09) is mounted on two arms (20) that are pivotally supported on a stand (1).
To do this, pull both cars together using the coil spring (22) and press the chain (4) to release the tentacle 121 of the arm (20).
) f 9 - If the tentacle 00) of the microswitch (9) is pressed, it can be applied to large machines, and if applied to fire doors of hotels and high-rise buildings, for example, Even if someone closes the fire door by mistake, the person behind can manually open it and evacuate safely.

Furthermore, when applied to the opening and closing of elevator and train doors, for example, even if a bag or other baggage is caught in the door, the door will continue to operate until it closes even if the door is opened manually and the baggage is removed.

It has a wide range of applications, such as when closing a water gate in a hydraulic dam, when a foreign object is caught, or when the motor is cut without straining it.

According to the present invention, abnormal torque is mechanically detected by being incorporated in the middle of the power transmission device, so that any abnormal transmission force is detected in the components that constitute the power transmission device, such as shafts, bearings, gears, belt mechanisms, etc. There is a dog effect that can stop the driving force without conducting it.

[Brief explanation of drawings]

-10- Fig. 1 is a perspective view of the main parts of the Buddhist altar door opening/closing device on which the present invention is based, Fig. 2 is a diagram explaining the operation, Fig. 3 is a perspective view of an embodiment of the present invention, and Fig. 4 The figures are parts diagrams of a ball friction clutch, FIG. 5 is an assembly diagram thereof, FIGS. 6, 7, and 8 are diagrams illustrating the operation of the present invention, and FIGS. 9 and 10 are diagrams illustrating the operation of another embodiment. (1)...unit, (2)...driven chain wheel, (3)...
... Drive chain wheel, (4) ... Chain, (51 ... Chain slipper, (6) ... Mounting part, (Force ... Spring, (8) ... Spring stand, (9) ...Micro switch, 00)...Tentacle, αυ...Motor, α...Ball friction clutch, 03)...Inner cylinder, (14)...Outer cylinder, 051...( hole), (16)
...Coil spring, aη...Ball, α mallet...Small hole, a9...Chain wheel, (20)...Arm,
eυ...tentacles, (2 views...coil springs, (2□□□
...conduction axis, (24) to (30)...missing numbers,
(31)...Zushi, (32)...Ceiling board, (3
3)...Curved hole, (34)...Floating rod, (35
)...Operating mechanism, (36)...Telescopic arm, (
37)...Body, (38), (39)...Gear, (40), (43)...Lead disc, (4
1)...Operation box, (42)...stand, (44)...
... Handle, (45) ... Thin twisted steel wire, (46)
...protection tube, (47), (48)...stopper, (49)...conduction shaft. (Figure off) 12-

Claims (1)

[Claims] 1) A chain with slack is engaged between a driving chain wheel and a driven chain wheel that transmit rotational power, and the slack part is pressed from the outside of the chain by a suppression device to the driven chain wheel side. An abnormal torque detection device characterized by a structure that uses a sensing device to detect tension in a chain due to abnormal torque that occurs. 2. An abnormal torque detection device according to claim 1, characterized in that a ball free cushion clutch is interposed on the shaft on the driven chain wheel side.