JPH075185Y2 - Vehicle door open / close drive - Google Patents

Description

The present invention relates to an opening / closing drive device for an automobile door, and more particularly to an opening / closing drive device suitable for opening / closing a door of a bus entrance / exit.

[Conventional technology]

As this type of opening / closing drive device, the piston in the air cylinder is reciprocated according to the operation of the electromagnetic valve to reciprocally move the vertical screw shaft in the axial direction, and the screw shaft engages in a rotatable and vertically movable manner. When the screw shaft is moved up, the possible hollow support is first rotated by the torque induced from the component force on the screw slope to close the door, and after the completion of the door closing operation, the support is integrated with the screw shaft and the support. It is well known that the door is vertically raised together with the door by a required amount with respect to the vehicle body and the door is locked to the vehicle body by the lock mechanism in the latter half of the ascent.

Then, in Japanese Patent Publication No. 61-4949, the prop is induced from the screw engaging portion while leaving a slight rotation angle just before the termination (completion) of the closing operation of the rotation allowable angle given to the prop. It is proposed that a part of the vehicle body be provided with a restraining member that restrains the rise due to the component force to a slight amount (the lock mechanism does not function at this rise amount) in cooperation with an engaging element provided at the upper end of the column. ing. The restraint member is also used as a member that regulates the allowable lift amount of the door to a predetermined amount at the door closing operation completion position of the door, and a screw is provided in a part of the vehicle body above the engaging element. It is provided so that the vertical position can be adjusted by rotation, and is prevented from rotating by a lock nut.

[Problems to be Solved by the Invention] According to the device of the above-mentioned publication, a person accidentally pushes the door and forcibly opens it in the latter stage of the door descending operation when the door is opened (at this time, the lock by the lock mechanism is still working). When activated,
A large turning force is applied to the notch of the restraining member from the strut-side engaging element projection, the restraining member rotates together with the lock nut, and the allowable amount for raising the door changes, so that the lock mechanism functions properly at the rising end of the door. At the same time, there is a risk that the lift may be permitted even at positions other than the lift control position.

The present invention has been made to solve the above-described problem, and even if a person accidentally pushes the door to forcibly open it during the operation of lowering the door when opening the door, the restraining member accurately blocks the rotation. It is an object of the present invention to provide an opening / closing drive device for an automobile door that is prevented from rotating.

[Means for Solving the Problems]

The above-mentioned object is to provide an engaging element having a projecting piece protruding upward at the upper end of the pillar, and to raise the pillar by a component force induced from the screw engaging portion except for the door closing operation completion position of the door. Has an arc-shaped sliding contact engagement surface that suppresses the sliding contact with the upper end of the protrusion, and a notch that allows the protrusion to move upward at the door closing operation completion position of the door. Except for the door closing operation completion position of the door, the rise of the pillar is suppressed to a small amount which is smaller than the required amount, and the door ascendable amount at the door closing operation completion position is the required amount. The restraint member defined in 1. above is attached to a part of the vehicle body above the engaging member so that the vertical position can be adjusted by rotation through a screw, and the restraint member protrudes outward on the outer periphery of the restraint member to surround the restraint member. The same by the engagement with the fixed member A locking member for restricting the rotation of the door opening direction of the braking member can be achieved by providing removably.

[Function and effect of device]

In the vehicle door opening / closing drive configured as described above, since the lock member for restricting the rotation of the restraining member in the door opening direction is detachably provided on the outer periphery of the restraining member, the lock member is removed. The vertical position can be adjusted by rotating the restraint member, the allowable rise amount of the door can be set appropriately, and rotation of the restraint member in the door opening direction is accurately regulated with the lock member attached. And properly prevent unnecessary rotation of the restraining member (for example, rotation when a person accidentally pushes the door to force the opening operation in the latter half of the door lowering operation when the door is opened). Therefore, the setting position of the suppressing member is not changed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, a door 10 is provided in front of a bus body 11 so as to be openable and closable, and has two arms 12 and a pivot 13.
And a bearing 14 for pivotal connection. The arm 12 is integrally fixed to a hollow pillar 15, and when the pillar 15 rotates around its axis, the door 10 turns as shown by the arrow in FIG. 2 to open and close the entrance 16 of the vehicle body 11. It is supposed to do. (See FIG. 3) In FIG. 3, the electromagnetic switching valve 20 is designed so that its operation is controlled by an energization control circuit to be described later.
21 and the atmosphere, and is also connected to the ports 25 and 26 of the air cylinder 24 through the speed control valves 22 and 23, respectively. Air pressure source 2
A filter, a check valve, an emergency cock for manual operation, etc. are usually provided between the two.

The air cylinder 24 is fixed at its upper end to the vehicle body 11 by a bracket 28, and internally includes a piston 27 that reciprocates vertically (axially). The piston 27 has a screw shaft extending vertically upward. 30 are assembled together. The screw shaft 30 has a function of rotating the column 15 by a predetermined amount by its vertical movement and a function of raising the column 15 by a required amount in the vertical direction, and the spline 31 is provided at a portion protruding from the air cylinder 24.
Equipped with a screw 32 and an air cylinder with a spline 31
It is spline-coupled to the inner spline member 33 fixed to the upper part of 24, and the liner 35 is attached via the ball 34 with the screw 32.
Is threadedly engaged with. The balls 34 are held at predetermined intervals by holders in a screw structure formed on the inner peripheral surface of the liner 35, and the liner 35 is fixed to the inner peripheral surface of the support column 15 by welding or the like.

Further, an upper liner 36 is fixed to the inner peripheral surface of the upper end of the column 15 in the same manner as the liner 35, and two claws 37 are cut and raised at the lower end thereof, and a compression double coil spring 38 is formed.
Accepts the bottom edge of. The coil spring 38 biases the column 15 downward, and its upper end is engaged with the support shaft 40. The support shaft 40 is fixed at its upper end to the vehicle body 11 by a bracket 41, and a small-diameter step portion that does not slidably contact the upper liner 36 is formed in a portion fitted to the upper end portion of the column 15. And a metal upper liner above and below this step.
A resin sleeve 42 used for sliding with 36 is fitted. In addition, the support shaft 40 is attached to the bracket 41 by the support shaft.
The upper screw portion of 40 is screwed into a nut 39 fixed to a bracket 41 and fixed with a lock nut 39A.

Therefore, in the present embodiment, the support shaft 40 is attached to the shaft shown in FIGS.
As shown in the enlarged view of the figure, the suppressing member 43 is fixed. This fixing is performed by the lock nut 44 and the support member 43 supporting shaft.
It is made by a loosening prevention coupling by screw engagement with 40. Further, screw holes that open in a substantially tangential direction are laterally provided at two locations on the outer periphery of the suppressing member 43, and a lock bolt 49 is detachably attached to one of the screw holes. The lock bolt 49 protrudes outward and engages with the bracket 41 to restrict the rotation of the suppressing member 43 in the door opening direction (counterclockwise rotation in FIG. 6). On the other hand, an engaging element 45 having a projecting piece 48 projecting upward is fixed to the upper end of the column 15 by a set screw 46 so as not to rotate.

The restraining member 43 has a cylindrical shape, and prevents the column 15 from being lifted by the component force induced from the screw engaging portion except for the door closing completion position of the door 10 during the rotation allowable angle given to the column 15. It has a function of restricting the amount to a small amount in cooperation with the joint member 45, and abutting the allowable amount of raising of the door 10 at the door closing operation completion position of the door 10 with the upper end of the column 15 to a required amount. It has two notches 47 at symmetrical positions on the body. The engagement element 45 has protrusions 48 that engage with the notches 47 at symmetrical positions.
When the door 10 reaches the closing operation completion position (the position shown by the phantom line in FIG. 7), the protruding piece 48 of the engaging element 45 fits into the notch 47 (see FIG. 6), and as a result, the support column 15 is formed. The required amount can be raised, and the door 10 is locked by a well-known wedge type lock mechanism (not shown) in the latter half of this rise. The member designated by the reference numeral 19 in FIG. 7 is a link member provided at the lower end of the door 10.

Further, in this embodiment, as shown in FIG.
Door reversing means is incorporated in the energization control circuit 50 of the electromagnetic switching valve 20. The energization control circuit 50 includes a battery power source 51, a manual switch 52, a micro switch 53, an optical sensor contact 54, a timer 55, a diode 56, and the like. The manual switch 52 is an opening / closing switch that is normally operated by the driver, and when the opening operation causes the electromagnetic switching valve 20 to be de-energized, air is supplied to the lower port 26 of the air cylinder 24, and the closing operation is performed. As a result, the electromagnetic switching valve 20 is energized to supply air to the upper port 25 of the air cylinder 24.

The micro switch 53 is a normally closed switch and is shown in FIG.
As shown in FIGS. 8 and 9, when the column 15 is lifted (after completion of the door closing operation), the protrusion 57a of the ring 57 fixed to the lower end of the column 15 pushes it to open it. It is like this. The projection 57a of the ring 57 is provided on the touch piece 53 of the switch 53 when the door reaches the closing operation completion position.
It is located just below a. Optical sensor contact 54
Is a contact point that opens and closes according to an optical sensor (not shown) provided at the entrance 16 of the vehicle body 11.
It is designed to close when it is detected that an object is present. The timer 55 energizes the electromagnetic switching valve 20 for a set time (the time required to fully open the door 10) when both switches 53, 54 are closed, and is automatically reset after the set time. Has become.

Next, the operation will be described. When the electromagnetic switching valve 20 is switched to the state shown in FIG. 3 when the vehicle is stopped on a flat ground and the door 10 is in the fully open state, the air cylinder 24
Air is supplied to the lower port 26 and exhausted from the upper port 25, and the piston 27 rises together with the screw shaft 30. As a result, due to the inclination of the screw 32, the support column 15, which engages the screw 32 through the ball 34, receives both component components of rotation and lift. Considering the resistance of the door 10 due to its own weight, the strength of the spring 38 and the screw 32
By setting the inclination of the column to a required degree, the column 15 is rotated only and the rotation can be continued to the door closing operation completion position of the door 10. This is because the force of the spring 38 and the total weight of the door 10 and its accessories overcome the above-mentioned rising component force. If the lower port 25 of the air cylinder 24 continues to be supplied with air after the door 10 reaches the door closing operation completion position, the screw shaft 30 further rises, but the column 15 can no longer rotate, so the screw shaft 30 and the column It rises as a united relationship with 15. This ascending stroke causes the door 10 to rise relative to the vehicle body 11, and in the latter half of this raising, the door 10 is moved to the vehicle body 11 by the well-known wedge lock mechanism.
Locked against. The spring 38 shown in FIG. 3 presses the pillar 15 downward during the above-mentioned door closing operation, suppresses the rising component force of the screw 32 acting on the pillar 15, and only allows the generation of torque to close the door 10. Secure. While the vehicle is stopped on a slope (uphill steep road) as shown in FIG. 1, the above operation is affected as described below.

In FIG. 1, the gravity W applied to the center of gravity of the door 10 in the open position acts as a two-component force of WA and WB. The direction of the force component WA is parallel to the hinge axis of the door, that is, the plane perpendicular to the support column 15, and the door 10 is in the middle of closing operation (while moving from the position shown by the solid line to the position shown by phantom line in FIG. 7). Resist as follows. This resistance is a torque of WA × L (L is the length from the pillar 15 to the door connecting portion shown in FIG. 7) and is applied to the pillar 15. A resistance torque similar to the resistance torque described above is also obtained when the door 10 receives the opening direction and the wind pressure in a vehicle stopped on a flat ground.

By the way, the support column generated by the component force of the screw slope of the screw 32.
The driving torque and the rising force of 15 increase as the air pressure in the air cylinder increases. The door closing operation torque when the vehicle stops on a steep road surface as shown in FIG. 1 is a value obtained by subtracting the above-mentioned resistance torque from the driving torque of the support column 15.
If the rising force of the support column 15 is generated before the door closing operation torque as the air pressure in the air cylinder increases, the support column 15 cannot rotate and the screw shaft 30 and the support column 15 are in an integrated relationship. The piston 38 of the air cylinder 24 is lifted while compressing the spring 38 in the upper part of the figure. That is, the door 10 is raised before the door closing operation completion position is reached.

Thus, in the present embodiment, the restraining member 43 and the engagement element 45
Is provided, the portions shown in FIGS. 4 to 6 function when the door 10 is raised. That is, the door 10 is still in the process of closing the door, and the protrusion 48 of the engagement element 45 is notched by the notch 47 of the restraining member 43.
If the door 10 tries to rise abnormally as described above when it does not match with the above, the tip of the protruding piece 48 comes into contact with the arcuate sliding engagement surface 43a formed on the lower surface of the body of the suppressing member 43, The amount of increase in 10 is suppressed to a slight amount. Therefore, the support column 15 rotates at a required angle while the projection 48 slides its tip against the sliding engagement surface 43a. When the pillar 15 has finished rotating at this required angle, the door 10 reaches the door closing operation complete position, the protrusion 48 is aligned with the notch 47, and the pillar 15 and the door 10 are allowed to rise by the required amount. In the latter half, a wedge-shaped lock mechanism (not shown) works and the door 10 is locked to the vehicle body 11.

Further, in this embodiment, since the door reversing means is incorporated in the energization control circuit 50 shown in FIG. 3, when the person / object intervenes in the entrance / exit 16 during the door closing operation described above, the optical sensor The contact 54 is closed, the timer 55 is activated, the electromagnetic switching valve 20 is energized for a set time, air is supplied to the upper port 25 of the air cylinder 24, and the piston 27 and the screw shaft 30 interlocking therewith are moved downward to move the door. A reverse operation, that is, an opening operation of the door 10 is obtained. Therefore, it is possible to prevent a person or thing from being caught between the door 10 and the entrance 16 when the door is closed.

The door reversing operation is obtained when the micro switch 53 is closed, that is, when a person or an object is present at the entrance 16 before the door 10 is closed, and after the door 10 is closed. Since switch 53 is open,
Timer 55 even if contacts 54 are closed due to people or objects intervening at the entrance / exit 16
Does not work, and door reversal operation cannot be obtained. Therefore, the door
The door 10 is not opened in response to the operation of the contact 54 when the door 10 is completely closed.

Further, in the present embodiment, the lock bolt 49 for restricting the rotation of the suppressing member 43 in the door opening direction is provided on the outer periphery of the suppressing member 43.
Since it is detachably provided, the vertical position can be adjusted by rotating the suppressing member 43 with the lock bolt 49 removed.
The allowable rise amount of the door 10 can be set appropriately, and the rotation of the restraining member 43 in the door opening direction can be accurately regulated while the lock bolt 49 is attached. (For example, when a person accidentally pushes the door 10 to forcibly open the door 10 in the latter half of the door lowering operation when the door is opened), it is possible to accurately prevent the rotation.
The setting position of the suppressing member 43 is not changed. In addition,
The lock bolt 49 is removed by loosening the nut 44 and rotating the restraining member 43 in the clockwise direction of FIG. 6 by approximately 90 degrees. To mount the lock bolt 49, rotate the restraining member 43 to rotate the door 10. The appropriate amount of rise is set, the lock bolt 49 is attached to the suppressing member 43 at a position close to the optimum value, and the suppressing member 43 is rotated counterclockwise in FIG.
Is engaged with the bracket 41 and then the nut 44 is tightened. Since the suppression member 43 has two screw holes, the optimum value is 1/2 the screw pitch of the suppression member 43.
The suppressing member 43 can be fixed within the following range.

[Modification]

In the above embodiment, as the means for detecting the completion of the closing operation of the door 10, the micro switch 53 for detecting the rise of the pillar 15 is adopted, but the door 10 is attached to the end of the door 10 or the entrance / exit 16 so that the entire door 10 is installed. It is also possible to employ a switch that operates when it is in the closed state. Further, instead of the contact 54 of the above embodiment, a contact of a proximity switch which is attached to the tip of the door 10 and detects the presence of a person / object between the door 10 and the entrance / exit 16 may be adopted. It is possible.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle equipped with a door opening / closing drive according to the present invention, FIG. 2 is a partial plan view of the same, FIG. 3 is a longitudinal sectional view of the door opening / closing drive, FIG. 4 and FIG. Is a partially enlarged view of the door opening / closing drive device, FIG. 6 is a cross-sectional plan view taken along the line VI-VI of FIG. 5, FIG. 7 is an explanatory view of the operation of main parts, and FIG. FIG. 9 is a plan view showing the relationship with a switch actuated by, and FIG. 9 is a side view of the same. Explanation of symbols 10 …… door, 11 …… car body, 15 …… pillar, 16 …… entrance / exit,
20 …… Electromagnetic switching valve (electromagnetic valve), 24 …… Air cylinder, 27 …… Piston, 30 …… Screw shaft, 41 …… Bracket (fixing member), 43 …… Suppressing member, 45 …… Engager, 49 …
... Lock bolt (lock member).

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A hollow hollow rotatable and vertically movable which reciprocates a piston in an air cylinder to reciprocate a vertical screw shaft in the axial direction according to the operation of an electromagnetic valve and screw-engages with the screw shaft. When the screw shaft is moved up, the pillar is first rotated by the torque induced from the component force on the screw slope to close the door, and after the door closing operation is completed, the pillar is integrated with the screw shaft and the pillar together with the door. In a vehicle door opening / closing drive device in which a required amount of vertical movement is raised with respect to a vehicle body and the door is locked with respect to the vehicle body by a lock mechanism in the latter half of the raising, an engaging element having a projecting piece protruding upward is provided. It is provided at the upper end of the pillar, and the pillar is raised by the component force induced from the screw engaging portion except for the closing operation completion position of the door by the sliding contact with the upper end of the projecting piece. An arc-shaped sliding contact surface for restraining, and a notch that allows the upward movement of the protrusion at the door closing operation completion position of the door, and except for the door closing operation completion position of the door, A restraint member that restrains the rise to a small amount that is smaller than the required amount and that regulates the allowable rise amount of the door at the door closing operation completion position to the required amount is provided above the engaging element of the vehicle body. A part of the restraining member is attached so that the vertical position can be adjusted by rotation through a screw, and the restraining member is engaged with a fixing member that is provided outside and protrudes from the outer periphery of the restraining member. An opening / closing drive device for an automobile door, which is detachably provided with a lock member for restricting rotation in an opening direction.