JPH0470237B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door opening/closing device for a dumb waiter among various lifting conveyors.

A dumbwaiter is a cargo transport machine that generally transports cargo weighing less than 500 kg to the upper and lower floors of a building along a vertical transport path.According to the Building Standards Act, the floor area of the cargo basket is Less than ^1m2 in height
The height is set at 1.2m or less, and restaurants, inns, schools,
They are installed in many places such as factories and banks, and by operating the push button switch installed on the side wall of the entrance on each floor, the electric hoist on the floor is activated, and the wire that suspends the basket is hoisted up and lowered. The movement moves the car up and down, and the loaded car is guided by the rails of the frame (hoistway) and moves up and down vertically while maintaining balance with the weight suspended from the other end of the wire. It is usually configured like this.

However, with current dumb waiters, the entrance/exit doors on each floor are manually opened and closed, and the openings of luggage baskets are often not equipped with doors, which prevents product damage due to luggage being caught. Machine breakdowns occur frequently, which not only leads to losses due to decreased product value, but also increases the cost of repairing machine breakdowns.
Recently, there has been a growing trend to attach special doors to luggage baskets. However, in conventional cases, most of the doors on the luggage cart side are manually opened and closed like the doors on the entrance/exit side, so when loading and unloading luggage, the inner and outer doors are opened at each stop floor. must be opened and closed manually, and automatic opening and closing requires at least one motorized door opening/closing device for each floor. However, it is inevitable that equipment costs and running costs will increase dramatically.
This was the biggest obstacle to automating the opening and closing of the door.

The device of the present invention was developed to solve the above-mentioned problem, and has a door in the front opening of the luggage basket that is opened and closed vertically via an electric hoist operated by a push button switch on each floor. In addition to providing
In the dumb waiter, the entrance frame of each floor is equipped with a non-powered entrance door that can be opened and closed up and down only when the luggage cart is stopped.
The swing angle is regulated by a fixed guide on the baggage basket side and a stopper on the basket door side, and the basket door lowers from a predetermined forward tilted position to a horizontal position at the beginning of its ascent, and from the horizontal position at the end of its descent. A rotating arm that returns to the original forward tilted position is pivotally mounted, and a catch bar that engages with the rotating arm is protruded from both sides of each entrance door. The car door is characterized by being configured so that the car door and the corresponding entrance/exit door can be automatically opened and closed in conjunction with the hoisting machine.

Hereinafter, the structure of the door opening/closing device according to the present invention and its operating procedure will be explained in detail with reference to drawings of embodiments. Figures 1 and 2 show the most typical implementation structure of a dumbwaiter equipped with the device of the present invention. This is an example.

In the drawing, numeral 1 is the concrete frame that becomes the hoistway of the dam waiter, 2 is the guide rail installed on both sides of the inner surface of the frame 1, 3 is the luggage basket for transporting luggage, and 4 is the upper floor of the frame 1. F ₁ and F ₂ are the frames installed at the entrances and exits for loading and unloading luggage from the floor of each floor to the inside of the luggage basket 3, and 6 is the sleeve of the entrance frames F ₁ and F ₂ . It is a push button switch installed on the wall, and by operating this push button switch 6, the electric hoist 4 on the floor is operated, and the wire 7 suspending the luggage basket 3 is hoisted up and lowered. By moving the basket 3 up and down, the luggage basket 3 is guided by the rail 2 and moves up and down vertically while maintaining balance with the weight 8 suspended from the other end of the wire 7, heading toward the entrance of the designated floor. It is configured to automatically stop at the position where it meets, and in this respect it is basically the same as a conventional dumb waiter. Entrance/exit door g attached to frames F ₁ and F ₂ ,
The device for opening and closing these door bodies has the following structure.

That is, in the case of this embodiment, the car door G and the entrance/exit door g are a pair of upper and lower door bodies G ₁ , G ₂ and g ₁ , respectively.
g ₂ , and these door bodies are connected to a wire 10 by the power of an electric hoist 9 (geared brake motor) installed on the top of the luggage basket 3.
The lower door body G ₂ of the car door G is raised and lowered while maintaining balance with the weight 11 through the gate, and each of the other gate bodies G ₁ , g ₁ , g ₂ is moved up and down through a door opening/closing device M unique to the present invention to be described later. All the gate bodies G _{1 ,} G ₂ , g ₁ , and g ₂ can be automatically opened and closed by one electric hoist 9 in conjunction with the lower door body G 2 .

Figures 3 to 9 show the structure of the door opening/closing device M, and the upper end of the upper door _G1 of _the car door G has a corresponding A locking plate 5 that engages with the upper end surface of the lower door body G ₂ is provided so as to protrude toward the front, and stoppers 12 a are provided diagonally above the lower end portions of both sides of the lower door body G ₂ to protrude in a “U” shape. A rotating arm 1 formed in a cross shape is attached to the circumferential surface 12b of the supporting shaft 12.
3 and free washers 1 on both left and right end surfaces of the arm.
4, and is fixed with a nut 15 so as not to be able to escape, and shaped fixed guides 16 are provided at the lower ends of both sides of the luggage basket 3 at positions corresponding to the rotation arms 13. Rotating arm 1
The rotation range of 3 is the fixed guide 16 on the luggage basket 3 side.
In this embodiment, the swing angle is restricted to approximately 80° by the stopper 12a on the side of the car door G, and the lower door body _G2 of the car door G is tilted forward to a predetermined level at the beginning of its rise. It is designed to fall down from the horizontal position to the horizontal position, and at the end of the lowering of the lower door body _G2 , to stand up from the horizontal position and return to the original forward tilted position. On the other hand, the upper door body g ₁ and the lower door body g ₂ of the entrance door g are connected to both ends of a wire 18 hanging down through an upper pulley 17, and when one door body g ₁ is raised, the other door body g ₂ is lowered, and among these, the upper door body g ₁
Catch bars 19 are protruded from the lower ends of both sides to engage with the tip of the rotary arm 13 at predetermined times (later rising and early lowering of the car door). The structure is such that the gate bodies g 1 and _{g 2} on the entrance/exit door g side open up and down when the lower door body G ₂ on the G side moves up and down, and the gate bodies g ₁ and g ₂ close during the latter half of the descent.

Since the dumb waiter equipped with the device of the present invention has the above-mentioned structure, the operation from pressing the push button switch 6 to moving the luggage basket 3 to the designated floor is exactly the same as that of the conventional dumb waiter, and there is no difference. However, in the case of the present invention, when the luggage basket 3 arrives at the destination floor as shown in FIG. Then, the lower door body _G2 of the car door G connected with the wire 10 is pulled upward.
In this way, the lower door body G ₂ is approximately 8 cm as shown in Figure 10 (b).
When the door body G ₂ rises to a certain degree, the rotating arm 13 provided at the lower end of the door body G 2 is guided by the fixed guide 16 and falls from the forward tilted position shown by the dotted line to the horizontal position shown by the solid line. Then, the lower door body _G2 continues to rise further, and the first
As shown in Fig. 0 C, when it rises to the height where it overlaps with the upper door body G ₁ (1/2 of the total lifting stroke), the latch plate 5 engages with the upper end surface of the lower door body G ₂ at this position, and at the same time The tip of the rotating arm 13 is the upper door body g ₁ of the entrance/exit door g.
Since it engages with the catch bars 19 protruding from both sides, as the lower door body _G2 on the car door G side rises, the upper door body _g1 on the car door G side and the entrance door g
The upper door body _g1 on the side moves up together with the lower door body _G2 , and the lower door body _g2 on the entrance/exit door g side also moves down in conjunction with the upper door body _g1 , and as shown in FIG. As shown in the figure, each door body G ₁ , G ₂ , g ₁ , g ₂ of the basket door G and the entrance/exit door g are all fully opened, so when a micro switch (not shown) detects this, the upper part of the luggage basket 3 opens. The electric hoist 9 automatically stops driving.

After 3 minutes have elapsed after the door is fully opened in this way, the electric hoist automatically rotates in the reverse direction by a timer (not shown), and the door opening operations a, b,
Each door body in the completely opposite order of C and D.
G ₁ , G ₂ , g ₁ , and g ₂ automatically perform the closing drive,
The baggage basket 3 is returned to the original fully closed state A, so the push button switch 6 can be pressed to move the luggage basket 3 to the desired floor.

As described above, if the door opening/closing device of the present invention is applied to a dumb waiter, the exquisite rocking locking action of the rotating arm with a special structure allows the door body on the car door side to be attached to each floor entrance/exit door. The door bodies on the sides are skillfully linked to perform the opening and closing movement, and one electric hoist can automatically open and close the entrances and exits on each floor regardless of the number of floors the luggage cart is parked on. The automation of the opening and closing of the doors of the car and each floor entrance has been realized with a very simple structure, which not only reduces equipment costs, but also greatly reduces running costs such as power consumption, labor costs, and machine maintenance. It is possible to save money, and the equipment is easy to handle and non-hazardous, making a great contribution to the safe transportation of products and the improvement of transportation efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a specific implementation structure of a dumb waiter equipped with the door opening/closing device of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is an enlarged view of the structure of the main part of the device. FIG. 4 is a side view showing the structure of the rotating arm, FIG. 5 is a plan view,
6 to 9 are side views showing the operating state of the rotating arm, and FIGS. 10A, 10B, 1C, and 10D are side views showing the opening and closing operations of the door body during use. M... Door opening/closing device, 1... Body, 2... Guide rail, 3... Luggage basket, 4... Electric hoist,
F ₁ , F ₂ ... Doorway frame, 5 ... Latching plate, 6 ... Push button switch, 7 ... Wire, 8 ... Weight, G ...
...Cash door, G ₁ ... Upper door body, G ₂ ... Lower door body,
g... Entrance/exit door, g ₁ ... Upper door body, g ₂ ... Lower door body, 9... Electric hoist, 10... Wire, 11
... Weight, 12 ... Support shaft, 12a ... Stopper, 12b ... Shaft circumferential surface, 13 ... Rotating arm, 1
4...Free Washer, 15...Natsuto, 16
... Fixed guide, 17 ... Pulley, 18 ... Wire, 19 ... Catch bar.

Claims (1)

[Claims] 1 The front opening of the luggage basket is provided with a basket door that can be opened and closed vertically via an electric hoist operated by a push button switch on each floor, and the door frame of each floor can be opened and closed vertically only when the luggage basket is stopped. In a dumb waiter equipped with a non-powered entrance/exit door, the swing angle is regulated by a fixed guide on the baggage basket side and a stopper on the basket door side at the lower ends of both sides of the basket door, and the swing angle is regulated by a fixed guide on the luggage basket side and a stopper on the basket door side. A pivoting arm is provided which is pivoted to fall down from a predetermined forward tilted position to a horizontal position at the initial stage and returns from the horizontal position to the original forward tilted position at the end of the descent, and the above-mentioned rotary arm is installed on both sides of each entrance door. A catch bar that engages with the rotating arm is provided in a protruding manner, and the car door and the corresponding entrance/exit door can be automatically opened and closed in conjunction with one electric hoist installed on the baggage cart side. A door opening/closing device for a dumb waiter featuring: