JPH0727599A - Rocking door with returning force changing device - Google Patents

Abstract

PURPOSE:To provide a rocking door with a returning force changing device capable of easily changing the initial energizing force of a torsion coil spring with an electric actuator or the like and freely changing the returning speed (returning force) of a door member. CONSTITUTION:This rocking door is provided with a pair of torsion coil springs 19, 20 concentric with the vertical axis P and wound in opposite directions to each other to return-energize a door member 13 rockably supported around the vertical axis P, their one-end sides 19a, 20a are hooked on the door member 13 side, and the other end sides 19b, 20b are hooked on a pair of rotary members 21, 22 rotatably around the vertical axis P respectively. A pair of rotary members 21, 22 are rotated in the opposite directions to each other to change the initial energizing force of a pair of torsion coil springs 19, 20, and a gear mechanism and an actuator are provided to hold the rotation positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is concentric with the vertical axis in order to urge the door member pivotally supported around the vertical axis to a predetermined swing angle, and The present invention relates to a swing door in which a pair of screw coil springs having opposite winding directions are provided, one end of each screw coil spring is locked to a door member side, and the other end is locked to a fixed frame side.

[0002]

2. Description of the Related Art Such a swing door is normally urged to return to a closed state (that is, a predetermined swing angle), and is pushed open when a person, a walking animal, or the like passes by, for example, and automatically after passing. It will return to the closed state. Since it is urged to return by a relatively simple structure using a torsion coil spring, it can be used for various simple gates.

[0003]

There are cases where it is desired to change and adjust the return urging force of such a swing door. For example, the return speed of the swing door is changed according to the number of walking animals passing through the gate per unit time. Conventionally, some air damper type swing doors can change the return speed, but in the swing door with a simple structure using the above-mentioned torsion coil spring, the return speed (return biasing force) can be freely changed. There is nothing I have done.

Therefore, according to the present invention, the initial biasing force of the torsion coil spring can be easily changed by using an electric actuator or the like, whereby the return speed (returning force) can be freely changed. The purpose is to provide.

[0005]

The rocking door with a restoring force changing device according to the present invention is characterized in that the other end of a pair of screw coil springs, one end of which is locked to the door member, rotates about the vertical axis. A gear mechanism that is locked to a pair of freely rotatable members, rotates the pair of rotating members in opposite directions to change the initial biasing force of the pair of torsion coil springs, and holds the rotating position. And an actuator.

The gear mechanism includes a pair of driven bevel gears that are concentrically fixed to the pair of rotating members, and a drive bevel gear that meshes with the pair of driven bevel gears and rotates about an axis perpendicular to the axis of ordinates. And the actuator rotationally drives the drive bevel gear,
Moreover, it is preferable that the electric motor with a reduction gear holds the rotational position. However, each rotating member and its driven bevel gear do not have to be separate bodies, and the rotating member and its driven bevel gear may be integrally configured by carving a gear around the rotating member.

[0007]

According to the above characteristic construction, the actuator rotates the pair of rotating members in opposite directions via the gear mechanism, so that the pair of torsion coil springs having opposite winding directions are both twisted at the torsion angle (that is, the initial deformation amount). ) Is increased or decreased, the initial biasing force of the door member is increased or decreased without changing the return position of the door member. Therefore, by controlling the drive of the actuator through appropriate signal input means and control means, the return speed (return force) of the swinging door can be easily changed and adjusted.

[0008]

As described above, according to the present invention, it is possible to easily change the initial urging force of the torsion coil spring by using an electric actuator or the like, whereby the returning speed (returning force) can be freely changed. It was possible to provide a swing door with a changing device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an exit gate of a cattle dynamic measuring device will be described below with reference to the drawings. The dynamic weighing apparatus shown in FIGS. 1 and 2 is for calculating the weight of a cow based on time-series load data obtained when the cow walks past the weighing platform 1. Before and after the weighing platform 1,
A fence 2 for forming a cow guideway is erected on the left and right. A pair of left and right fences 3 are also erected on the weighing platform 1 to form a passage through which cows can walk through the weighing platform 1 one by one. In front of the entrance of the weighing table 1, an entrance gate G1 that is controlled to open and close in order to raise each cow to the weighing table 1 is installed, and an exit gate G2 is attached to the exit part of the weighing table 1.

The weighing platform 1 is provided with a steel frame body and a FRP (fiber reinforced resin) foot plate mounted on the frame body,
The four corners are supported by the load cell 4. The load applied to the tread and the frame when the cow walks through the weighing platform 1 is 4
It is detected as the total value of the outputs of the load cells 4. However, since the value changes according to the walking cycle of the cow, it is necessary to estimate and calculate the stationary weight by an appropriate calculation process. This changing weight output (analog voltage) is input to the processing device 5 and subjected to signal processing such as amplification and smoothing. Further, the weight calculation means 5 provided in the processing device 5 is A / D converted at a predetermined sampling time and provided as a digital value.
a) (see FIG. 9). The weight calculation means 5a temporarily stores the load data, which are sequentially digital values, in the memory, and calculates the weight of the cow as described later.

The calculated weight is displayed and output together with the individual number of the cow on the display provided in the processing device 5,
Also, it is printed out by the printer. The cow individual number is automatically entered as follows. A transponder T for transmitting the cow's individual number is attached to the ankle of the hind leg of the cow. The transponder T includes a memory for storing an individual number and a micro wireless communication device, and transmits the individual number in response to a transmission request by wireless communication. A loop antenna 6 for receiving the individual number from the transponder T is installed on the footboard of the weighing platform 1.

With the above-mentioned structure, the processing device 5 automatically identifies the individual number of the cow by the following procedure. When the weighing of one cow is completed, a response request signal and a radio wave serving as a power supply are transmitted from the loop antenna 6 at a constant cycle in order to receive the individual number of the next cow. When the next cow goes up to the weighing platform 1 and the transmitting means T attached to the ankle thereof is supplied with electric power by the radio wave and becomes active, it transmits the stored information (that is, the individual number) in response to the response request signal. This signal is input to the processing device 5 via the loop antenna 6 for both transmission and reception.

The entrance gate G1 is constructed as shown in FIGS. A pair of left and right door members 8 and 9 are pivotally supported by the left and right columns so as to be swingable around the vertical axis. The pair of door members 8 and 9 are biased to return to the closed state indicated by the solid line in FIG. 4 by a torsion coil spring (not shown). The structure of the return biasing force by the torsion coil spring is similar to the return biasing structure of the door member of the exit gate which will be described later.

The door member 8 on the right side (the left side in FIG. 3) facing the entrance gate is urged by the opening / closing drive motor 10 to have its position biased between a position shown by a solid line and a position shown by an imaginary line in FIG. It is rotationally driven so that it can be switched between. That is, the closed state shown by the solid line and the half-open state shown by the imaginary line are switched. When the entrance gate is in the closed state, the cow stops before the entrance gate, and when the entrance gate is in the half-opened state, the cow pushes the door members 8 and 9 open and goes up to the weighing platform 1. The opening / closing drive device 10 is driven by a control signal from the control means 5b (see FIG. 9) in the processing device 5.

A magnetic proximity sensor 11 and its detected piece 12 are provided on the door member 9 and the fixed frame on the left side of the entrance gate.
Is provided, and the proximity sensor 11 is turned on when the door member 9 rotates by a predetermined angle α or more. This detection signal is used as a signal for determining that the cow is passing through the entrance gate or has passed the control means 5
Input to b.

As shown in FIGS. 5 and 6, the exit gate G2 is pivotally supported by a fence 3 on the right side of the exit of the weighing platform 1 so as to be swingable about the longitudinal axis, and is biased to return to the closed state. It is composed of a horizontally long door member 13 and the like. The size and installation height of the door member 13 are set so that the tip end of the door member 13 hits the cow's shoulder bone and is pushed open. And
The magnetic proximity sensor 14 is attached to the fixed frame (fence) 3 and the detected piece 15 is attached to the door member 13, and when the door member 13 rotates by a predetermined angle β or more, the proximity sensor 14 is turned on. It is configured. This detection signal is input to the control means 5b as a signal for determining that the cow is passing or has passed the exit gate.

The outlet door member 13 is biased to return to a closed state (state shown by a solid line in FIG. 6) by a torsion coil spring as described below. As shown in FIGS. 7 and 8, a vertical shaft member 16 is fixed to the fence 3, and a pipe 17 rotatably fitted to the vertical shaft member 16 is integrally attached to the pivot end side of the door member 13. A spring receiving bar 18 protruding in the radial direction is fixed to the upper portion of the pipe 17, and one end side 19 of a pair of torsion coil springs 19 and 20 provided above and below the spring receiving bar 18 are fixed.
a and 20a are locked to the spring receiving bar 18.
A pair of torsion coil springs 19 loosely fitted on the pipe 17,
20 has winding directions opposite to each other and has the same restoring force for the same torsional deformation amount. And the same initial biasing force (deformation amount) is given.

With the above-described structure, the door member 13 is biased to return to the closed state, and is swingable around the vertical axis P with the closed state as the swing center angle. Further, the return urging force is configured to be changeable as described below. The other ends 19b and 20b of the pair of torsion coil springs 19 and 20 are locked to a pair of upper and lower rotating members 21 and 22 which are rotatable around the vertical axis P. Rotating member 2
1, 22 are rotatably fitted on the pipe 17, and are vertically rotatably supported and rotatably supported by a fixed frame 3a fixed to the fence 3. In between, a pair of screw coil springs 19, Holds 20. Inside the rotating members 21 and 22, there are provided recesses 21a and 22a for accommodating a part of the torsion coil springs 19 and 20 and axial small holes 21b and 22b communicating with these, and the torsion coil springs 19 and 22b are provided in these small holes. The other end side 19b, 20b of 20 is inserted.

Bevel gears are formed by carving oblique teeth on the outer circumferences of the pair of rotating members 21, 22. However, the rotating members 21 and 22 and the bevel gear fixed concentrically to the rotating members 21 and 22 may be separately configured. A bevel gear 23 that meshes with the pair of bevel gears (rotating members) 21 and 22 and is driven to rotate around a horizontal axis perpendicular to the vertical axis P is provided. Bevel gear 23 is coupling 24
Is connected to the output rotary shaft of the electric motor with reduction gear 25 via.

When the bevel gear 23 is rotationally driven by the electric motor 25 with a reducer, a pair of upper and lower bevel gears 2 are driven.
1 and 22 rotate in mutually opposite directions, and the torsional deformation amounts of the pair of torsion coil springs 19 and 20 both increase or decrease. The position after the increase / decrease of the torsional deformation amount is maintained even when the power supply to the electric motor 25 with a reducer is stopped. As a result, the initial biasing force of the pair of torsion coil springs 19 and 20 is increased or decreased by the same amount in the same direction, and the door member 13
, Its return force increases or decreases without changing its swing center angle, that is, the return urging position.

The restoring force changing means CM of the exit gate door member 13 having the above-mentioned structure is automatically operated by the control means 5b. That is, normally, the restoring force is set to such an extent that the mechanical load of the swinging mechanism of the door member 13 and the restoring force changing means CM does not become too large.
If two cows go up in the next one, the next cow will be the weighing platform 1
In order to gain time to stay and obtain sufficient load data for weight calculation, the restoring force is increased to accelerate the returning speed of the door member 13.

Next, the algorithms for calculating the weight and controlling the restoring force changing means CM and the like executed by the weight calculating means 5a and the control means 5b of the processing device 5 will be described with reference to FIGS.
A brief description will be given based on. FIG. 9 is a control block diagram showing the flow of signals. In the figure, the weight calculation means 5a and the control means 5b are actually configured as one microcomputer program, and information is exchanged with each other. FIG. 10 and FIG. 11 respectively show a simplified example of changes in the load (voltage after smoothing) obtained from the weighing table 1 when there is only one cow and two cows on the weighing table 1. is there. In the figure, S11 and S14 respectively represent an ON signal of the proximity sensor 11 of the input gate or the proximity sensor 14 of the output gate, that is, a signal indicating that the cow is passing through the input gate or the output gate. Are shown at different levels.

First, when the control means 5b drives the entrance gate opening / closing drive motor 10 to open the door member 8 in a half-opened state, the cow pushes the door members 8 and 9 open and moves up to the weighing table 1. When the ON signal S11 of the proximity sensor 11 at the input gate is detected and the sequential load data input from the weighing platform 1 through the processing by the low pass filter, the A / D converter, etc. exceeds the predetermined threshold value, the weight calculation is performed. The means 5a starts writing the load data into the memory. Further, the control means 5b returns the door member 8 of the entrance gate to the closed state. Then, the weight calculation means 5a extracts the maximum values P1, P2, P3, ... Which appear in a relatively long cycle corresponding to the walking cycle of the cow from changes in the load data and stores them. When the number of stored maximum values reaches three, the first maximum value P1 to the third maximum value P3
Is calculated as the effective data section T1, and the average value of the load data in this section is calculated and used as the rest weight of the cow.

When the cow eventually comes down from the weighing platform 1 through the exit gate, the ON signal S14 of the proximity sensor 14 at the exit gate is detected, as shown in FIG. The door member 8 of 1 is set to the anti-open state. Then, the next cow pushes open the door members 8 and 9 and goes up to the weighing platform 1, so that the ON signal S11 of the proximity sensor 11 is detected, the valid data section T2 is obtained in the same manner as described above, and the average value during that period. The weight of the cow is calculated from this. By repeating such a process, continuous weighing of a plurality of cows can be automatically performed.

FIG. 11 shows the case where the cows on the back are moved to the weighing table 1 while the cows on the front are still on the weighing table 1. Such a situation occurs when a subsequent cow forcibly passes through the entrance gate despite the entrance gate being closed. In this situation, the ON signal S11 of the proximity sensor 11 of the input gate and the ON signal S of the proximity sensor 14 of the output gate
It can be detected in the order of 14. That is, in the normal case, the signal S11 and the signal S14 are alternately detected as shown in FIG. 10, but in the case of the abnormality, the signal S11 continues as shown in FIG. That is, the next signal S11 is detected before the signal S14 is detected.

The control means 5b has a signal S11 and a signal S1.
4 is temporarily stored and the above-mentioned abnormal state is judged. Then, the signals S11 to S14 in FIG.
During the period up to, since two cows are on the weighing platform 1, the data in this section are ignored. That is, processing such as extraction of the maximum value or the effective data section and calculation of the average value are not performed.
Then, if the first signal S14 is detected, only the cattle after descending from the weighing platform 1 are on the weighing platform 1, and the weight calculation is performed to calculate the weight of the cattle after the first signal S14 is detected. .

As shown in FIG. 11, there is no problem if three or more maximum values can be extracted from the time when the previous cow descends from the weighing platform 1 to the time when the latter cow descends. If a subsequent cow descends immediately after going down from 1, the maximum value of three or more cannot be detected, and therefore the valid data section T2 cannot be obtained, so that the weight of the subsequent cow cannot be calculated. In order to avoid such a situation, it is necessary to gain time for the subsequent cow to descend from the weighing platform 1.

In order to cope with such a case, the control means 5b operates the restoring force changing means CM of the exit gate door member 13 to increase the restoring force and accelerate the returning speed of the door member 13. That is, normally, the restoring force is set to such an extent that the mechanical load of the swinging mechanism of the door member 13 and the restoring force changing means CM does not become too large, but to detect the state where there are two cows on the weighing platform 1. Along with this, the restoring force changing means CM is operated to increase the restoring force. As a result, when the preceding cow pushes open the exit gate door member 13 and descends from the weighing platform 1, the door member 1
The speed at which 3 returns to the closed position becomes faster, and a relatively rapid damping swing occurs until it settles at the returned position, so that it is possible to prevent a subsequent cow from quickly descending from the weighing platform 1.
As the subsequent cow descends from the weighing platform 1, the restoring force changing means CM is operated to restore the original restoring force.

The gear mechanism and the actuator for rotating and holding the pair of torsion coil springs in opposite directions in order to change the restoring force of the door member 13 are not limited to the structure of the above-described embodiment, but can be variously changed. . For example, a combination of a crown gear and a pinion gear may be used instead of the bevel gear. A cylinder device may be used as the actuator instead of the electric motor with a reduction gear.

The present invention can be applied not only to the swinging door of the exit gate of the dynamic weighing device as in the above-described embodiment but also to the swinging doors of various gates. The purpose of making the restoring force changeable varies depending on the type and purpose of the gate, and is not particularly limited. It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[0031]

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a cow dynamic weighing device.

FIG. 2 is a side view showing a schematic configuration of a dynamic measuring device.

[Figure 3] Front view of the entrance gate

FIG. 4 is a plan view of the entrance gate.

[Fig. 5] Front view of the exit gate

FIG. 6 is a plan view of the exit gate.

FIG. 7 is a side view of the exit gate door restoring force changing means.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a control block diagram.

FIG. 10 is a graph showing an example of changes in load values and the like when there is only one walking animal on the weighing platform.

FIG. 11 is a graph showing an example of changes in load values and the like when two walking animals are on the weighing platform.

[Explanation of symbols]

 3a Fixed frame 13 Door member 19,20 Screw coil spring 19a, 20a One end side of screw coil spring 19b, 20b The other end side of screw coil spring 21,22 Rotating member (driven bevel gear) 23 Driving bevel gear 25 Actuator P Vertical axis

Claims (2)

[Claims] 1. In order to urge the door member (13) pivotably supported around a vertical axis (P) so as to return to a predetermined swing angle, the door member (13) is concentric with the vertical axis (P). A pair of spiral coil springs (19, 20) having opposite winding directions are provided, and one end side (19a, 20a) of each spiral coil spring (19, 20) is locked to the door member (13) side. ,
In the swing door in which the other end side (19b, 20b) is locked to the fixed frame (3a) side, the other end side (19b, 20b) of the pair of torsion coil springs (19, 20) is the vertical axis center. (P) The pair of rotating members (21, 22) are respectively locked to the pair of rotating members (21, 22) that are rotatable around the pair of rotating members (21, 22) to change the initial biasing force of the pair of torsion coil springs (19, 20). )
A swinging door with a restoring force changing device, which is provided with a gear mechanism and an actuator for rotating the gears in opposite directions and holding the rotation position. 2. The gear mechanism includes a pair of driven bevel gears (21, 22) concentrically fixed to the pair of rotating members (21, 22) and a pair of driven bevel gears (21, 22). The drive bevel gear (23) is meshed with the drive bevel gear (23) rotating about an axis orthogonal to the vertical axis (P), and the actuator is provided with the drive bevel gear (2).
The rocking door with a restoring force changing device according to claim 1, comprising an electric motor (25) with a speed reducer, which rotationally drives (3) and holds the rotational position.