JPS621292Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Purpose of the Invention) This invention relates to an automatic return type barrier for forest roads that automatically returns to the closed state after a predetermined period of time even if the closing rod is raised and passed through and left as it is.

(Prior art) Chains as shown in Figure 1 and manual barriers as shown in Figure 2 have been used to regulate the traffic on forest roads, but passers-by who do not consider those behind them often block the roads. Because the driver passes through without restoring the closed chain or rod that is in the open position, it may cause a misunderstanding among those following that the forest road is passable, and this may cause falling rocks or other accidents while passing. The current situation is that a huge amount of money, tens of millions of yen, is spent annually on compensation.

(Structure of the invention) This invention solves this problem by manually opening the closing rod of the circuit breaker, but in order to return it to the closed state automatically and slowly, the cam and its rotation are operated in conjunction with the cam. It has a configuration equipped with a control device for braking, and will be described below based on one embodiment.

FIG. 3 is an overall perspective view of the automatic return type circuit breaker. The closing rod 4 is fitted into the tip cylinder at the closing rod bearing part 3 which is protruded from the upper road shoulder side of the support column 2 which is vertically installed on the board 1 which fixes the circuit breaker on the roadside, and the other cylinder end is fixed. The closing rod holder 6, which is pivotally connected via the closing rod support shaft 5 protruding from the shaft 5, is kept balanced with the bearing portion 3 as a fulcrum by a counterweight 7 installed on the road shoulder side of the support shaft 5.

When the guide trochanter 8 protruding from the lower part of the closing rod receiver 6 comes into contact with the outer cam surface of the cam plate 11 pivoted on the support shaft 10 of the opening/closing handle 9 of the circuit breaker and rolls, the closing rod 4 The cam shape is formed so that the cam can be held in the open position for a long time within the rotation range of the cam, and furthermore, it lowers as the opening/closing handle 9 rotates until the minimum radius is reached at the end of the rotation and the closing rod 4 comes down to automatically close. A pinion 13 shown in FIG. 4 is fitted onto the support shaft 10 in order to directly connect it to the control device 12 installed on the road side above the pillar 2 of the barrier for control.
Compression spring 15 of the rack piston 14 that meshes with this
Braking of the control device 12, which has a series of elastic damping mechanisms, compresses the hydraulic fluid in the hydraulic damping chamber 16 by pushing up and sliding, and drains the oil through an orifice 17 whose flow rate can be adjusted, and sends the oil to the oil storage chamber. It has added functionality. This control device has the same structure as a known buffering device used when opening and closing a door, but it may also have other similar functions.

To explain the function of this device, (1) When opening the circuit breaker Figure 5 shows the cam handle in the normal position with the circuit breaker closed. To raise the closing rod 4, manually turn the opening/closing handle 9 counterclockwise 200 degrees.
When rotated, the control device 12 is activated via the pinion 13 fitted on the support shaft 10 as shown in FIG.
The coil spring 15 in
The closing rod holder 6 is introduced through the cam plate 7 and pivoted around the column bearing 3 as a fulcrum via a guide trochanter 8 that contacts and rolls on the outer cam of the cam plate 11 fitted coaxially. While maintaining the balance with the counterweight 7, the closing rod 4 is opened and pushed up to an angle of 80° to reach the open state shown in FIG. At this time, the relative positions of the rack piston 14, coil spring 15, etc. within the control device 12 are as shown in FIG.

(2) When closing the circuit breaker Figure 7 shows that if the cam plate 11 is rotated 200 degrees counterclockwise and the circuit breaker is left open, the rack piston 14 will close due to the elastic force of the coil spring 15 in the control device 12. is pushed up as shown in FIG. 4, and the pinion 13 that engages with this is rotated clockwise, and the opening/closing handle 9 fitted coaxially is rotated back. In this case, in the control device 12, the upper hydraulic damping chamber 16 is pushed up by the rack piston 13.
In order to compress the hydraulic oil introduced into the chamber, the flow rate of the hydraulic oil escaping is squeezed by the orifice 17 and introduced into the oil storage chamber, so the sliding movement of the rack piston 14 is braked and the opening/closing handle 9 returns slowly. Cam plate 11 that rotates and is coaxially fitted
Since the operating radius of the outer peripheral cam is configured to maintain the open state of the closing rod 4 for a long time, the closing rod 4 remains open until the rotation of the cam plate reaches its minimum radius position.
When the closing rod 4 finally returns to the minimum radius position while maintaining the generally open state, the closing rod 4 returns to the normal position, that is, the horizontal state, so that the automatic return can be delayed.

(Effects of the invention) This invention utilizes a well-known buffering device to create a barrier that can be used to control the automatic return motion, and is simple and safe to use, thereby preventing disturbances in forest road traffic regulation, which was the initial objective. Since the elimination of accidents can be automatically achieved, this type of accident can be completely reduced, which has a great effect in leading to a reduction in the enormous compensation costs that have been considered the responsibility of road management.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of traffic regulation using chains. Second
The figure is an explanatory diagram of the same as the above using a conventional road barrier. Figure 3 is a perspective overall view of the automatic return type circuit breaker. FIG. 4 is a cross-sectional explanatory diagram of a control device corresponding to opening of a circuit breaker. Fifth
The figure is an explanatory diagram of the relationship between the cam plate and the closing rod when the cam plate is in its normal position. FIG. 6 is an explanatory cross-sectional view of the control device corresponding to the closing of the circuit breaker in FIG. 4. FIG. 7 is an explanatory diagram of the relationship between the cam plate pressure and the closing rod when the rotation is 200 degrees. Explanation of symbols of main parts, 3... Pillar bearing part, 4
... Closing rod, 6... Closing rod holder, 8... Guide trochanter,
10... Support shaft (opening/closing handle shaft), 11... Cam plate, 12... Control device, 13... Pinion.

Claims (1)

[Scope of utility model registration request] A guide trochanter 8 protruding from the lower part of the closing rod holder 6, which is pivotally attached to the pillar bearing 3 of the circuit breaker and has the closing rod 4 inserted and fixed from the tip of the cylindrical portion, contacts the cam plate 11. When rolling on the outer circumferential cam, the cam shape is formed so that the open position of the closing rod 4 can be maintained for a long time during the operational rotation of the cam, and furthermore, through the pinion 13 fitted on the support shaft 10. An automatic return type circuit breaker characterized in that it is directly connected to a control device 12 that can operate an elastic damping mechanism.