JP2012092535A - Opening/closing device for lifting slide door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive opening/closing device of a simple structure for a lifting slide door, in which the lifting stroke of a door can be large even if a cylinder is small-sized and the door can be automatically lowered without using a special driving source.SOLUTION: The upper end part of a cylinder body 13a of an air cylinder 13 disposed above a slide door 1 so as to be obliquely inclined is pivoted on the right end part of an upper part connection member 4 in a vertically swingable manner, and the lower end part of a piston rod 13b is pivoted on a left side end part of the upper end part of the slide door 1 in a vertically swingable manner. Flow-rate control means 18 is provided on the cylinder body 13a, the flow-rate control means 18 controlling the air exhaust amount in the cylinder body 13a such that free relative movement of the cylinder body 13a and the piston rod 13b is allowed when the slide door 1 is raised and the slide door 1 is slowly lowered when the slide door 1 is lowered from an upper limit position to a lower limit position.

Description

  The present invention relates to an opening / closing device for an elevating slide door provided in an opening for taking in and out articles, and in particular, the elevating stroke of the door is large and the door uses a driving source such as electricity or compressed air. The present invention relates to an opening / closing device for an elevating slide door that can be lowered automatically.

  As a conventional opening and closing device that opens and closes a door or the like, a device that opens and closes a door or a window by supplying compressed air to an air cylinder and expanding and contracting a piston rod is generally used (for example, Patent Document 1 and 2).

Japanese Patent No. 3595127 JP-A-55-2131

  However, in the opening / closing device described in Patent Documents 1 and 2, work such as an air pump, a control device, piping, and electrical wiring for supplying compressed air to the air cylinder is required outside the air cylinder. Construction and maintenance become complicated, and the switchgear becomes complicated and large, resulting in high costs. In addition, there is a problem that the door cannot be opened or closed during a power failure. Furthermore, since all the air cylinders are arranged so as to face in the vertical direction, for example, when it is desired to increase the opening / closing stroke of a door or window, an air cylinder having a large vertical dimension is used. The telescopic stroke must be made large. In this case, the cost of the air cylinder increases and a large installation space must be secured.

  The present invention has been made paying attention to such a problem, and even with a small cylinder, the lifting stroke of the door can be increased, and the door can be automatically operated without using a special drive source. It is an object of the present invention to provide an opening / closing device for an elevating slide door that can be lowered in an inexpensive manner and has a simple structure.

In order to solve the above-described problem, an opening / closing device for a lifting slide door according to the present invention includes:
An opening / closing device for an elevating slide door that is provided at an opening for taking in and out articles, opens the opening when rising, and closes the opening when descending,
Above the slide door, a door support cylinder comprising a cylinder body and a piston rod protruding from the cylinder body is disposed so as to be inclined obliquely upward and downward, and the base end of the cylinder body and the piston rod Either the left or right side end of the stationary member above the sliding door, and the other end of the base end of the cylinder body or the front end of the piston rod, It is pivotally attached to either the left or right side edge of the upper end of the sliding door so as to be swingable in the vertical direction. When the sliding door is raised, the cylinder body and the piston rod can be freely moved. When the sliding door is lowered from the upper limit position to the lower limit position, the fluid flow rate in the cylinder body is set so that the sliding door descends at a slow speed. It is characterized in that a control flow control unit.
According to this feature, the door support cylinder is provided between the upper end portion of the slide door and the immovable member thereabove so as to be inclined obliquely in the vertical direction and swingable in the vertical direction. As compared with the relative movement stroke between the cylinder body and the piston rod, the lifting stroke of the sliding door can be increased. Therefore, even with a small door support cylinder having a small stroke, the opening for putting in and out the article can be opened largely. Moreover, the slide door can be automatically lowered slowly from the upper limit position to the lower limit position only by providing a flow rate control means for controlling the flow rate of the fluid in the cylinder body. Therefore, it is possible to provide an opening / closing device that is simple in structure and inexpensive, has few failures, and can open and close the sliding door even during a power failure.

The opening / closing device for the elevating slide door of the present invention is:
The door support cylinder is an air cylinder having intake and exhaust ports that are open to the atmosphere at both ends of the cylinder body. A flow rate control means for controlling the flow rate of the air exhausted from the mouth is provided.
According to this feature, since a general general-purpose air cylinder can be used, a more inexpensive opening / closing device can be provided. In addition, since the flow rate control means is provided at the intake / exhaust port in the direction in which the piston rod protrudes relative to the cylinder body, the air pressure in the cylinder chamber compressed by the piston does not change greatly, and the intake / exhaust Since the flow rate of air exhausted from the mouth can be controlled to be constant, the sliding door can be smoothly lowered at a constant speed, and the door can be lowered safely and without impact.

The opening / closing device for the elevating slide door of the present invention is:
The door support cylinder is a fluid-filled cylinder, and a piston in the cylinder body of the fluid-filled cylinder is provided with a flow rate control means for controlling the flow rate of fluid to the cylinder chamber sandwiching the piston.
According to this feature, since the flow rate control means is provided on the piston in the cylinder body, the flow rate control means is not exposed to the outside, and the cylinder body is sealed, and dust contained in the outside air flows into the interior. Therefore, the durability of the door support cylinder is improved.

The opening / closing device for the elevating slide door of the present invention is:
The tilt angle with respect to the horizontal of the door support cylinder at the lower limit position of the slide door is 45 degrees or more, and the tilt angle with respect to the horizontal of the door support cylinder at the upper limit position is also 15 degrees or less.
According to this feature, when the tilt angle of the door support cylinder is 45 degrees or more, the effective stroke of the piston rod when the slide door is raised and lowered becomes large, so that the opening / closing stroke of the slide door can be increased. At the same time, the slide rod can be pulled up smoothly by retracting the piston rod without difficulty. Also, if the inclination angle of the door support cylinder at the upper limit position is 15 degrees or less, the piston rod extension amount becomes smaller than the slide door lowering amount and the door supporting cylinder is lowered at the initial lowering of the sliding door. Therefore, the slide door can be quickly lowered to the intermediate position. Therefore, the descent time until the sliding door reaches the lower limit position can be shortened.

The opening / closing device for the elevating slide door of the present invention is:
The cylinder main body in the door support cylinder is provided with a lower limit position detection sensor for detecting the lower limit position of the slide door and an upper limit position detection sensor for detecting the upper limit position by detecting the sliding position of the internal piston. A lock means is provided that can hold the slide door at the lower limit position and the upper limit position by interlocking with the operation of both detection sensors.
According to this feature, when the slide door reaches the lower limit position and the upper limit position, the locking means is automatically operated, and the slide door can be easily held at the lower limit position and the upper limit position. In particular, it is not necessary to separately provide means for keeping the sliding door stopped at the upper limit position or manually operate other locking means, so that the work for putting in and out the article becomes efficient.

The opening / closing device for the elevating slide door of the present invention is:
A wire retractable mainspring unit is provided on the stationary member above the door, and the lower end of the wire drawn from the mainspring unit is connected to the upper end of the slide door.
According to this feature, the sliding door can be lifted lightly with a light force with the assistance of the mainspring unit.

It is a front view of the state where the raising / lowering slide door was closed by the opening / closing apparatus in an Example. It is a front view when raising / lowering a sliding door up to the middle. It is a front view when raising / lowering a sliding door up to an upper limit position. It is a front view when a raising / lowering type slide door descends to the middle from an upper limit position. It is a vertical side view along the VV line of FIG. FIG. 6 is an enlarged cross-sectional plan view taken along line VI-VI in FIG. 1. FIG. 7 is an enlarged cross-sectional plan view taken along line VII-VII in FIG. 1. It is the schematic of an air cylinder. It is a longitudinal cross-sectional view which shows the modification of a door support cylinder.

  EMBODIMENT OF THE INVENTION The form for implementing the opening / closing apparatus of the raising / lowering slide door which concerns on this invention is demonstrated below based on an Example.

  With reference to FIGS. 1 to 9, an opening / closing device for an elevating slide door according to an embodiment will be described. Reference numeral 1 in FIG. 1 denotes an elevating slide door (hereinafter abbreviated as a door) by the opening and closing device according to the embodiment of the present invention. The door 1 is formed in a front view shape using a translucent synthetic resin or the like, and is provided so as to be movable up and down on a vertically long frame-like frame 2 installed at an article delivery port such as a distribution station.

  As shown in FIGS. 1, 5, and 6, the frame 2 includes a pair of left and right columns 3, 3 that form an inwardly U-shaped cross section in plan view, and a side-view inverted L that connects the upper ends of both columns 3. The upper connecting member 4 having a U-shaped cross section, the lower connecting member 5 having an upward U-shaped cross section connecting the inner surfaces of the lower ends of both struts 3, and the rear surfaces of the intermediate portions in the vertical direction of both struts 3 are coupled. An intermediate connecting member 6 having a U-shaped cross-section in side view, and a reinforcing member 7 screwed to the upper end portion of both struts 3 and the rear surface of the intermediate portion in a diagonally up and down direction, and the intermediate connecting member in the frame 2 A frame-like space below 6 is an opening K through which articles are taken in and out (see FIGS. 2 to 4).

  Four locking brackets 8 having a pair of left and right upward hook-shaped locking hooks 8 a, 8 a are screwed to the front surfaces of the left and right columns 3, 3. The locking brackets 8, 8 have cover columns 9, 9 wider than the support column 3, which can cover almost half of the front surface of the support column 3 in the vertical direction. The upper and lower locking holes (not shown) are detachably attached to the left and right locking hooks 8a and 8a.

  A wide front cover 10 for concealing an air cylinder 13 and the like, which will be described later, from the front is provided on the upper and lower two locking brackets 8, 8 on the left and right support columns 3, 3. The upper and lower locking holes (not shown) drilled in the inward pieces 10a and 10a are detachably attached by locking to the left and right locking hooks 8a and 8a of each locking bracket 8 (see FIG. 7). 2 to 4, the support cover 9 and the front cover 10 are removed and illustrated. Note that the above-described locking metal fitting 8, the column cover 9 and the front cover 10 locked thereto are not necessarily required, and may be omitted.

  As shown in FIG. 6, guide members 11, 11 facing the vertical direction of the inward L-shaped cross section in plan view are fixed to the opposing surfaces of the left and right support columns 3, 3. Between the front inward pieces 3 a of the left and right support columns 3, guide rails 12, 12 having an inwardly U-shaped cross section with a small frictional resistance made of polyacetal or the like extend over almost the entire length of the support column 3. It is fixed. By the pair of left and right guide rails 12, both end portions of the door 1 are slidably held up and down.

  As shown in FIG. 1, a general air cylinder 13 that is a door support cylinder is disposed above the door 1 so as to be inclined obliquely upward and downward, and an upper end (base) of the cylinder body 13a. The end portion is pivotally attached to a bracket 14 screwed to the lower surface of the right end portion of the upper connecting member 4 so as to be swingable in the vertical direction by a pivot 15 in the front-rear direction.

  The lower end portion of the piston rod 13b that protrudes downward from the cylinder body 13a is pivotally attached to the rear surface of the upper end portion at the left end portion of the door 1 so as to be swingable in the vertical direction by a pivot 16 in the front-rear direction. When the door 1 is at the lower limit position shown in FIG. 1, the inclination angle of the air cylinder 3 with respect to the horizontal is preferably 45 degrees or more, and is about 53 degrees in this embodiment.

  As shown in the schematic diagram of FIG. 8, the upper and lower ends of the cylinder body 13 a in the air cylinder 13 are provided with intake and exhaust ports 17, 17 that are open to the atmosphere. A flow rate control means 18 is provided at the intake / exhaust port 17. This flow rate control means 18 is provided in the variable orifice 20 provided in one of the parallel flow paths 19 and 19 and in the other flow path 19 to disable the discharge of air from the cylinder body 13a. And a check valve 21 that allows inflow of outside air to 13a.

  In the air cylinder 13 described above, when the piston 22 connected to the piston rod 13b moves upward in the cylinder body 13a, the check valve 21 opens, and the outside air flows into the cylinder chamber 23 below the piston 22, At the same time, the air in the cylinder chamber 24 above the piston 22 is exhausted to the outside through the upper intake / exhaust port 17. Therefore, the piston rod 13b can be degenerated without resistance.

  On the other hand, when the piston 22 at the upper limit position moves downward, outside air freely flows into the cylinder chamber 24 above the upper intake / exhaust port 17 and the check valve 21 of the flow rate control means 18 is closed. Thus, the air in the lower cylinder chamber 23 is exhausted to the outside little by little through the variable orifice 20 of the flow rate control means 18. Thereby, the piston rod 13b can be lowered at a slow speed.

  As shown in FIGS. 1 and 8, at the upper and lower ends of the cylinder body 13a, a lower limit position detection sensor 25 for detecting the lower limit position of the door 1 by detecting the sliding position of the piston 22 by magnetism or the like. An upper limit position detection sensor 26 for detecting the upper limit position is attached. Both the detection sensors 25 and 26 are electrically connected to an electromagnetic solenoid 27 which is a locking means of the door 1 so that when both detection sensors 25 and 26 are operated, the plunger 27a of the electromagnetic solenoid 27 protrudes to the right. It has become.

  As shown in FIG. 7, the electromagnetic solenoid 27 is screwed to the front surface of the right end portion of the intermediate connecting member 6. When the door 1 is raised to the upper limit position, the plunger 27a of the electromagnetic solenoid 27 is fixed to the lower and upper ends on the rear surface of the right end portion of the door 1 by screwing the inverted L-shaped lock fittings 28, 28 in a side view. The door 1 is held at the upper limit position by entering immediately below the lower lock fitting 28. When the door 1 is lowered to the lower limit position, the door 27 is held at the lower limit position by the plunger 27a of the electromagnetic solenoid 27 entering just above the lock fitting 28 at the upper end.

  A wire retractable mainspring unit 29 is screwed to the lower surface of the left end portion of the upper connecting member 4, and the lower end of the wire 30 drawn downward is connected to the rear surface of the left upper end portion of the door 1. Thereby, when the door 1 is pulled up manually, an upward auxiliary force is applied, and the door 1 can be pulled up with a light force.

  Next, a procedure for opening and closing the door 1 will be described. When opening the door 1 located at the lower limit position of FIG. 1, first, an electromagnetic solenoid 27 is operated by operating a push button switch for unlocking not shown, and the plunger 27a is locked at the upper end. The door 1 is unlocked by retracting from just above the metal fitting 28.

  Next, the door 1 is pulled up by placing a hand on the handle 31 provided at the center of the lower end thereof. Then, as the door 1 rises, the piston rod 13b of the air cylinder 13 is gradually retracted. At this time, as described above, the piston rod 13b is degenerated without resistance by the action of the flow rate control means 18 and the intake / exhaust port 17 opened to the atmosphere above the cylinder body 13a, and with the auxiliary force by the mainspring unit 29. The door 1 can be lifted lightly with a light force.

  As described above, when the inclination angle of the air cylinder 13 when the door 1 is positioned at the lower limit is 45 degrees or more, for example, about 53 degrees, the effective stroke of the piston rod 13b when the door 1 is moved up and down. Therefore, the opening / closing stroke of the door 1 can be increased, and the piston rod 13b can be retracted without difficulty to lift the door 1 smoothly.

  FIG. 2 shows a state in which the door 1 is lifted halfway. At the same time that the piston rod 13 is retracted, the entire air cylinder 13 swings upward about the upper end of the cylinder body 13a.

  FIG. 3 shows a state in which the door 1 is pulled up to the upper limit position and the opening K is fully opened. In this state, the piston rod 13 is retracted to the rear limit position, and the entire air cylinder 13 is further swung upward. Move. In this case, the inclination angle of the air cylinder 13 with respect to the horizontal is preferably 15 degrees or less, and is about 13 degrees in this embodiment.

  When the door 1 is pulled up to the upper limit position, as described above, the upper limit position detection sensor 26 is actuated, the plunger 27a of the electromagnetic solenoid 27 protrudes, and enters the lower portion of the lock fitting 28, so that the door 1 has an upper limit. It is automatically held in position and prevented from descending by its own weight.

  To lower the door 1 from the upper limit position, a push button switch (not shown) is operated to operate the electromagnetic solenoid 27, and the plunger 27a is retracted from directly below the lower lock fitting 28 to lock the door 1. To release. Then, the door 1 is lowered by its own weight. At this time, as described above, the air in the lower cylinder chamber 23 is exhausted little by little through the variable orifice 20 of the flow rate control means 18. As a result, the piston rod 13b and the door 1 descend at a slow speed.

  FIG. 4 shows a state in which the door 1 is lowered halfway. As described above, when the inclination angle of the air cylinder 13 at the upper limit position is, for example, about 13 degrees, The extension amount of the piston rod 13b becomes smaller than the lowering amount, and the air cylinder 13 swings relatively downward, so that the door 1 can be quickly lowered to the intermediate position. Therefore, the descent time until the door 1 reaches the lower limit position can be shortened.

  As described above, in the present embodiment, the air cylinder 13 can be tilted between the upper end portion of the door 1 and the upper connecting member 4 so as to face obliquely up and down and can be swung in the up and down direction. Therefore, the lift stroke of the door 1 is larger than the expansion / contraction stroke of the piston rod 13b. Therefore, even with a small air cylinder 13 having a relatively small stroke, the opening K is opened largely. can do.

  Further, the door 1 can be automatically lowered at a low speed from the upper limit position to the lower limit position only by providing the flow control means 18 at the intake / exhaust port 17 below the cylinder body 13a. Therefore, it is not necessary to use a special driving source such as the above. Therefore, the structure of the switchgear composed of the air cylinder 13 or the like is simplified, and an inexpensive switchgear can be provided.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the air cylinder 13 having a configuration in which the intake and exhaust ports 17 opened to the atmosphere are provided at the upper and lower ends of the cylinder body 13a and the flow rate control means 18 is provided at the lower intake and exhaust ports 17 is used. However, it is also possible to use a fluid-filled cylinder 33 in which a fluid 32 such as oil or air or an inert gas is sealed as shown in FIG.

  In this fluid-filled cylinder 33, a check valve 35 and an orifice 36 as flow rate control means are provided on a piston 34 that slides inside a cylinder body 33a. That is, when the piston rod 33b is raised, the check valve 35 is opened, and the fluid 32 in the cylinder chamber above the piston 34 freely flows into the cylinder chamber below the piston 34, and conversely, the piston rod 33b. When the valve is lowered, the check valve 35 is closed, and the fluid in the cylinder chamber below the piston 34 flows out little by little through the orifice 36 into the cylinder chamber above the piston 34.

  In the above embodiment, the upper end of the cylinder body 13a of the air cylinder 13 is pivotally attached to the upper connecting member 4, and the lower end of the piston rod 13b is pivotally attached to the upper end of the door 1. As the upside down direction, the lower end portion of the cylinder body 13a may be pivotally attached to the upper end portion of the door 1, and the upper end portion of the piston rod 13b may be pivotally attached to the upper connecting member 4. Also in the fluid filled cylinder 33 of FIG.

1 Elevating slide door 4 Upper connecting member (non-moving member)
5 Lower connecting member 6 Intermediate connecting member 13 Air cylinder (door support cylinder)
13a Cylinder body 13b Piston rod 17 Intake / exhaust port 18 Flow rate control means 22 Piston 23 Lower cylinder chamber 24 Upper cylinder chamber 25 Lower limit position detection sensor 26 Upper limit position detection sensor 27 Electromagnetic solenoid (locking means)
29 Mainspring unit 30 Wire 32 Fluid 33 Fluid filled cylinder (door support cylinder)
33a Cylinder body 33b Piston rod 34 Piston

Claims (6)

An opening / closing device for an elevating slide door that is provided at an opening for taking in and out articles, opens the opening when rising, and closes the opening when descending,
Above the slide door, a door support cylinder comprising a cylinder body and a piston rod protruding from the cylinder body is disposed so as to be inclined obliquely upward and downward, and the base end of the cylinder body and the piston rod Either the left or right side end of the stationary member above the sliding door, and the other end of the base end of the cylinder body or the front end of the piston rod, It is pivotally attached to either the left or right side edge of the upper end of the sliding door so as to be swingable in the vertical direction. When the sliding door is raised, the cylinder body and the piston rod can be freely moved. When the sliding door is lowered from the upper limit position to the lower limit position, the fluid flow rate in the cylinder body is set so that the sliding door descends at a slow speed. Elevating sliding door opening and closing device, characterized in that a control flow control unit.   The door support cylinder is an air cylinder having an intake / exhaust port opened to the atmosphere at both ends of the cylinder body, and the intake / exhaust port is provided in the one intake / exhaust port in the direction in which the piston rod projects relative to the cylinder body. 2. The opening / closing device for an elevating slide door according to claim 1, further comprising a flow rate control means for controlling a flow rate of air exhausted from the opening.   The door support cylinder is a fluid-filled cylinder, and a piston in the cylinder body of the fluid-filled cylinder is provided with a flow rate control means for controlling the flow rate of fluid to the cylinder chamber sandwiching the piston. The opening-and-closing apparatus of the raising / lowering type sliding door of 1.   4. The tilt angle with respect to the horizontal of the door support cylinder at the lower limit position of the sliding door is set to 45 degrees or more, and the tilt angle with respect to the horizontal of the door support cylinder at the upper limit position is set to 15 degrees or less. Opening and closing device for the elevating slide door according to claim 1.   The cylinder main body in the door support cylinder is provided with a lower limit position detection sensor for detecting the lower limit position of the slide door and an upper limit position detection sensor for detecting the upper limit position by detecting the sliding position of the internal piston. 5. A lifting / lowering slide door according to claim 1, further comprising a locking means capable of holding the slide door at a lower limit position and an upper limit position by interlocking with the operation of both detection sensors. Switchgear.   The wire pull-in type mainspring unit is provided on the stationary member above the door, and the lower end of the wire fed out from the mainspring unit is connected to the upper end of the slide door. Open / close type sliding door opening and closing device.

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