JP2024022446A - Locking device of flap door - Google Patents

Abstract

To provide a locking device that can surely lock a locked piece of a flap door regardless of adjustment by an operator.SOLUTION: A locking device includes: a base plate 3 attached to a pole; a base 4 disposed on the base plate; a swing member 5 supported by the base, disposed swingably in a range from a standing state where the longitudinal direction is substantially in parallel with the base plate to an inclined state with an angle, and having an appropriate length; and biasing means 6 configured to apply biasing force to the swing member with the base as a reference. The swing member is formed on a distal end side from the swing center and is provided with a lock portion 51 retractable in the movement trajectory area of a locked piece 7 depending on a change in orientation of the swing member and an operation portion 52 formed at a rear end side from the swing center to allow for an artificial operation of the swing member. The biasing means biases the swing member toward the movement trajectory area of the locked piece and guides the swing member into the standing state.SELECTED DRAWING: Figure 2

Description

The present invention relates to a locking device for a swing door (sometimes simply referred to as a "swing door") that is provided on the bed of a truck and forms the side or rear part of the bed.

The swing door of the loading platform is a plate-shaped door that forms the side or rear part of the loading platform, and is pivoted between the loading platform surface by a hinge, etc., and is rotatable around this pivot support. The whole is fixedly supported by locking the free end side to a supporting column or other column (hereinafter sometimes abbreviated as column) provided on the loading platform. This sliding door can be rotated about a hinge or the like by releasing the locking state with the pillar, so that it can be suspended downward from the surface of the loading platform. Therefore, when the swing door is suspended, there is no partition on the side or rear part of the loading platform surface, and it becomes possible to load and unload cargo onto the flat loading platform surface.

This swing door locking device is used when fixing the pillar and both ends of the swing door, and conventionally, the locking device has been used with a metal fitting called a metal fitting. Ebikin consists of a protrusion and a hook that is hooked to the protrusion, and the piece to be locked of the sliding door is placed between the protrusion and the hook, and the hook is hooked to the protrusion. Accordingly, the locked piece is held between the two (see Patent Document 1). In general, the handle is rotatably supported on a shaft, and a support shaft for supporting the hook is provided at a position with an appropriate distance from the rotation axis of the handle toward the tip of the handle. A compression spring is interposed between the support shaft and the support shaft. The handle can only be rotated around the rotation axis, and by rotating the handle, the support shaft will move around the rotation axis, changing the position of the hook tip. It is something that can be done. Therefore, by tilting the handle in an upright position or by turning it a lot and letting the tip of the hook engage the protrusion, then returning it to the upright position, the support shaft will approach the rotation axis of the handle, and the compression spring will be released. This action urges the hook toward the tip of the handle, so that the hook applies a tensile force to the protrusion and engages it. Note that the support shaft of the hook is located closer to the support column than the rotation axis of the handle when the handle is in the upright state, and in this state, the bias of the compression spring is applied by the force between the protrusion and the support shaft. It acts directly between the two and maintains the locked state.

Utility model registration No. 3179697

As mentioned above, in the case of a locking device for a sliding door that uses a sliding metal, the support shaft that is biased by the spring is located closer to the column than the rotation axis of the handle, so that the locking state with the hook is prevented. is maintained, so when the support shaft moves outward from the rotation shaft, the state of being hooked by the hook may be released. A strong tension spring is used in the Ebikin to make it firmly latched, and when operated manually, it requires physical strength to rotate the handle and extend the tension spring. Moreover, since a plurality of coins are used for the swing door, the handle must be operated many times each time the swing door is opened and closed, which can make the operation cumbersome. Therefore, even if the hook is not fully locked, if the hook is even slightly caught on the protrusion, the swing door will not be opened, so if you are repeatedly locking and releasing the door, be careful ( Inadequate locking could have been caused (intentionally). In addition, in the hooked state, the hook rubs against the protrusion due to the action of the strong tension spring and vibrations during running, causing both to gradually wear out, and as a result, the action of the tension spring is reduced. It could also weaken, and the latching state could be accidentally released (an insufficient latching state). However, if the locking is insufficient, the handle protrudes from the vehicle body and may come into contact with something during movement (transportation), and furthermore, the hook may unexpectedly come off the protrusion completely. In such a case, there is an inconvenience that an unexpected situation may occur in which the door swings open. In particular, when the loaded items are supported by the side or rear portions of the carrier, releasing the latching condition may cause the loaded items to fall.

Therefore, the technique disclosed in Patent Document 1 mentioned above provides a second locking member on the handle and a second locked member on the base side in order to prevent accidental release of the lock. When the handle is placed in an upright position, the rotation of the handle is restricted by locking the second locking member of the handle to the second locked member on the base side. The second locking member is swingably provided, and is biased toward the locking side by a coil spring, and by rotating the handle to the intended upright state, the second locking member can be moved to the second locked position. It was possible to lock it to the locking member. Further, when tilting the handle, the handle is operated with the second locking member released (swinging against the urging force of the coil spring).

However, the problem with a locking device that uses a lock is that if the operator does not operate the handle to its original (planned) upright position, the locking state will continue to be incomplete. In particular, even if the tip of the hook is slightly caught on the protrusion, the sliding door can be loosely locked. In other words, the locked piece of the sliding door is held between the protrusion and the hook, but if the hook is caught on the protrusion, the latch is insufficient. Even if there is, the door may not open. Therefore, when you want to avoid the hassle of latching when moving for a short period of time (for example, moving several tens of meters), or when the rotating shaft of the handle is rusted and strong force is required to operate the rotation, etc. In this case, an incomplete latching condition was sometimes left unattended.

The present invention has been made in view of the above points, and its purpose is to provide a locking device that can reliably lock a locked piece of a swing door without depending on the operator's control. The goal is to provide the following.

Therefore, in order to lock the swing door that rotates by a shaft support at the free end side, the present invention provides a structure that is provided on the free end side of the swing door that moves along a predetermined movement locus as the swing door rotates. A device for locking a piece to be locked with a supporting column, the device comprising: a base plate attached to the surface of the column; a base provided on the base plate; a swinging member of an appropriate length that is swingable in a range from an upright state in which it is substantially parallel to the base plate to an inclined state at an angle; and a biasing means for applying a biasing force, the swinging member being formed on the distal end side of the center of swing, and changing the movement locus area of the locked piece according to a change in the attitude of the swinging member. The device includes a locking portion that can be moved inward and retractable, and an operating portion that is formed on the rear end side of the center of the swinging member and that allows manual operation of the swinging member, and the urging means is characterized in that it urges the swinging member toward the movement locus region of the locked piece, and guides the swinging member to an upright state at least when locking the locked piece. shall be.

According to the above configuration, the swinging member supported by the base can swing in a range from the upright state to the tilted state, and the locking portion formed on the distal end side of the center of the swing is capable of swinging. Since the movable member can move in and out of the moving trajectory area of the locked piece in response to changes in the posture of the moving member, in a state where the locking part appears within the moving trajectory area of the locked piece, the locked piece The piece can be clamped between the base plate and the base plate. The piece to be locked is locked by this clamping state. On the other hand, in a state where the locking part is released from within the movement trajectory area of the locked piece, the locked piece becomes movable without being restricted by the locking part and can move until it reaches the base plate, or It also becomes possible to be sufficiently far away from the base plate. Therefore, by locking all of the locked pieces that are used for a single swing door to lock the swing door, the swing door becomes locked, and all the locked pieces are locked. When the locking piece is released, the door is unlocked.

Here, since the biasing means biases the swinging member toward the movement locus area of the locked piece, when the biasing force of the biasing unit acts on the swinging member, , the posture of the swinging member is changed so that the locking portion appears within the movement locus area of the locked piece. On the other hand, when the swinging member moves in the opposite direction against the biasing force of the biasing means, the posture of the swinging member is changed so that the locking part is retracted from within the movement locus area of the locked piece. I will let you do it. Furthermore, since the biasing force of the biasing means guides the swinging member to the upright state at least when locking the locked piece, the swinging member guided by the biasing force is not in the upright state. If it is to be maintained and tilted, it is necessary to resist the biasing force. Therefore, when the swinging member is in the state where the biasing force is applied, the locking portion located on the tip side of the swinging member in the upright state can lock the locked piece, and on the other hand, When the swinging member is in a state of resisting the biasing force, the locked piece can be unlocked.

When the locked piece is locked, the swinging member cannot swing independently. This is because when the swinging member swings, the locking portion approaches the base plate, but the locking portion is unable to move due to the presence of the locked piece. In addition, since the biasing force on the swinging member is constantly acting in a direction that causes the locking piece of the swinging member to appear within the movement locus area of the locked piece, the swinging member (especially the locking part) Since the swinging member cannot be easily moved due to vibrations generated during driving of a vehicle, etc., the locking member is not unexpectedly released.

Note that when locking a piece to be locked from a state where a biasing force is acting on the swinging member (a state in which locking is possible) and the piece to be locked is not locked, Although there is a method of artificially changing the posture of the swinging member, the present invention moves the locked piece along the movement trajectory, and partially contacts the locking part during the movement trajectory. The principle is to operate the system in such a way as to make it happen. In other words, when the locked piece comes into contact with the locked part, the locked piece applies an external force to remove the locked part from the movement trajectory, and uses that external force to increase the urging force of the urging means. Therefore, the attitude of the swinging member can be changed against the movement of the swinging member. In this way, by making locking possible only by moving the locking piece, a reliable locking state can be realized.

The invention configured as described above further includes a swing shaft for swingably supporting the swing member with respect to the base, and the swing member supports the swing shaft. The base includes a first long hole that supports the swing shaft and allows the swing shaft to slide, and the first long hole supports the swing shaft. The movable member may be provided in an elongated manner in a direction substantially parallel to the longitudinal direction when the movable member is in the upright state.

According to such a configuration, the urging force by the above-mentioned urging means acts in the direction of moving the swinging member along the first elongated hole via the swinging shaft of the swinging member. The longitudinal direction of this elongated hole is approximately parallel to the longitudinal direction of the swinging member when it is in the upright state, so when a biasing force is applied, the locking part formed at the tip of the swinging member is locked. If the swinging member moves backward against this urging force, the locking part moves in the direction of recessing from within the movement trajectory area of the locked piece. This is what we will do.

Further, in the invention configured as described above, the shaft support portion includes a biasing receiving portion that receives a biasing force from the biasing means at a rear end side of the swinging shaft, and the biasing receiving portion is configured to receive the biasing force from the biasing means. A first slanted region is formed which is angled with respect to a direction perpendicular to the longitudinal direction of the member, and when the urging force of the urging means acts on the first slanted region, the swinging In addition to sliding along the first elongated hole of the shaft, the swinging member may be biased to change its swinging position from a tilted state to an upright state.

In the case of such a configuration, the swing shaft is moved in a linear direction along the first elongated hole (that is, linear movement relative to the swing member) by a single urging means; It is possible to bias the swinging member both to guide the swinging member to the upright state (that is, to induce the swinging member to swing). Therefore, when an external force that resists the biasing force acts on the swinging member, the swinging shaft moves linearly (retreats against the biasing force), causing the swinging member to swing and tilt. After that, if no external force acts, the swing shaft moves linearly in the urging direction (progresses in the urging direction), and the swing member is guided. The swinging causes the robot to return to the standing state. In the case of a locking operation, this returned state is a state in which the locked piece is locked by the locking part, and in the case of a release operation, a part of the swinging member (Operation units, etc.) do not protrude laterally beyond the loading platform. Therefore, the swinging member (the entire locking device) can be prevented from unexpectedly coming into contact with the outside in both the locking and unlocking situations.

Furthermore, in the invention configured as described above, the locking portion includes a locking region that can come into contact with the locked piece while facing the locked piece when the locked piece has moved to the base plate; A contact area that allows contact by the locked piece when the piece moves toward the base plate is formed separately, and the contact area receives the contact of the locked piece and allows the rocker to contact the locked piece. The movable shaft may be moved and the swinging member may be guided to swing.

According to the above configuration, the locking part formed at the tip of the swinging member has a region (locking region) that functions at the time of locking while facing the locked piece exclusively, and a region (locking region) that functions exclusively when the piece is locked. It is divided into a region (contact region) that functions when the swinging member is forcibly moved in response to contact with the piece, and each produces a different effect.

Here, regarding the locking area, if a flat part is formed that can face the surface of the locking piece when the locking piece is locked, then the locking area will come into contact with each other in an appropriate area. The locked state can be ensured by

On the other hand, the contact area changes the posture of the swinging member upon contact with the locked piece during movement within the movement locus area. Therefore, the swing shaft is moved and the swing member is guided to swing at the same time. "Guiding" means changing the attitude of the locked piece from the movement locus area to a state where the locking part is recessed. Here, the change in the attitude of the swinging member due to the contact of the locked pieces is, firstly, to move the swinging member swing shaft in the opposite direction to the urging direction against the urging force of the urging means. , and secondly, to swing the swinging member around the swing axis. As described above, when the swinging member assumes a predetermined attitude, the locking state is released when the swinging member assumes the predetermined attitude due to manual operation using the operating unit. This allows the piece to be locked to pass through the locking portion and reach the base plate. Note that in order to induce such a change in the attitude of the swinging member, the contact area can have a curved shape. The curved surface shape may be two-dimensionally changed such that the distance from the swinging axis gradually increases toward the tip side of the swinging member.

In the invention with the above configuration, a sliding contact area that allows sliding contact by the locked piece is formed separately between the locking area and the contact area of the locking part of the swinging member. In this case, the sliding direction of the locking portion is guided by the sliding contact of the locking piece.

In the case of the above configuration, the swinging member whose posture has been changed by contacting the locked piece with the above-mentioned contact area continues to be in sliding contact with the locked piece in the sliding contact area. This sliding contact guides the moving direction of the locking portion, and as a result, induces a change in the posture of the swinging member. In other words, when the locked piece moves toward the base plate, it comes into contact with the contact area, thereby removing the locking part from within the movement trajectory area (the locking part sinks from within the movement trajectory area). However, after the piece to be locked reaches the base plate, the locking part must appear within the movement locus area so that the piece to be locked can be locked. Therefore, in order to change the posture of the swinging member so as to achieve this state, it is necessary to apply a biasing force by a biasing means, and in order to apply the biasing force smoothly, the sliding contact area guides the moving direction of the locking part while slidingly contacting the locked piece.

Further, in the above configuration, the bias receiving portion is arranged in a direction perpendicular to the longitudinal direction of the swing member so as to be continuous with the front end of the first oblique region and inclined toward the front end side of the swing member. A second oblique region is formed to have an angular shape, and when the biasing force of the biasing means acts on the second oblique region, the first elongated hole of the swing shaft is formed. In addition to the sliding movement along the vertical axis, the swinging member is biased to change the swinging position from the upright position to the tilted position, and the swinging member is biased to change the swinging position from the upright position to the tilted position, and the first tilted position The biasing force may be selectively applied to the shaped region and the second diagonal region.

According to the above configuration, two types of slanted regions are formed in the bias receiving portion and can selectively receive the bias of the biasing means, thereby guiding the swinging member to the upright state. In addition to this, it is also possible to induce a tilted state. By selectively biasing the two different slanted regions, the guidance to the upright state (biasing the first slanted region) is the basic energization state, and the tilting is performed only in special cases. Induction into the state (biasing the second diagonal region) may be selectable. When the swinging member is guided to the tilted state, the swinging member may be maintained in the tilted state when the locked piece is released from the locking portion. In other words, when there are a plurality of locked pieces provided on the sliding door, when releasing the locked pieces by manual operation of the swinging member, each locked piece is individually released from the locked state in a complete state. (Moving the stopper outward from between the locking part and the base plate) may cause the door to twist. In order to avoid this, for example, a plurality of swinging members that lock a plurality of locked pieces are maintained in an inclined state, so that the locking is temporarily released. Then, if all the locked pieces for locking the swing door are temporarily released and the swing door is rotated, all the locked pieces will be completely locked at the same time. This means that the lock can be released in this state.

Furthermore, in the invention configured as described above, the swinging member is provided with a stopper that stops the action of the urging force by the urging means between it and the base, and the shaft support part is provided with a stopper that stops the action of the urging force by the urging means, and The shaft is inserted through the shaft to allow the swinging shaft to slide, and the swinging member has a position relative to the longitudinal direction of the first elongated hole within the range of the swinging posture in which the swinging member changes from an upright state to a tilted state. A second elongated hole elongated in the angular direction is provided, and the center of the swing can be changed by sliding the swing shaft, and the second When changing the center of swing by moving the swing member against the biasing force of the biasing means while sliding the swing shaft along the elongated hole, the bias of the swing member is The movement in the direction may be stopped by the stopper.

According to the above configuration, the swing shaft can be slid within the range of the second elongated hole by manually operating the operating section that constitutes the swing member. At this time, the longitudinal direction of the second elongated hole is an angular direction with respect to the longitudinal direction of the first elongated hole within the range of changing swinging postures, so that the state of the posture of the swinging member is Regardless, the entire swinging member can be moved in a direction different from the movable swinging shaft by the first elongated hole. Therefore, the swinging member can be moved in a direction relatively away from the base plate (or base). When the swinging member is in an upright state and is moved in a direction against the urging force of the urging means by human operation, the stopper can stop the movement in the restoring direction in that state. can. As a result, a temporary unlocked state can be created.

Similarly, in the invention configured as described above, the swing shaft is inserted into the shaft support portion to allow the swing shaft to slide, and when the swing member is in an inclined state, the swing shaft is inserted into the shaft support portion. A second long hole is provided which is elongated in an angular direction with respect to the longitudinal direction of the first long hole, and the center of swing can be changed by sliding the swing shaft, When the swinging member is brought into a tilted state and the center of swing is changed by an artificial operation using the operating section, the action of the biasing force by the biasing means moves from the first slanted region to the second slanted region. The area can be changed to a shape area.

In the case of the above configuration, the swing shaft for swinging the swing member is slidable within the range of the second elongated hole, and by changing the position of the swing shaft, The center of swing of the swing member can be changed. At this time, when the swinging member is in an inclined state, the longitudinal direction of the second elongated hole is an angular direction with respect to the longitudinal direction of the first elongated hole, so the movement is caused by the first elongated hole. The entire rocking member can be moved in directions different from the possible rocking axes. Therefore, the swinging member can be moved in a direction relatively away from the base plate (or base). Only when the swinging member is in the inclined state, the biasing force of the biasing means is changed from the state acting on the first slanted region to the second slanted region by human operation. Since it can be changed to a state in which it acts against the locking member, a temporary unlocking state can be brought about only when the swinging member is in a special state.

Further, in the invention having the above configuration, the base portion is connected to the rear end side in the longitudinal direction of the swinging member of the first elongated hole, and is arranged in an acute angle direction with respect to the first elongated hole. A third elongated hole is provided that extends in a direction away from the base plate, and the swinging shaft can be guided into the third elongated hole by manual operation using the operating section. While being locked to the tip of the third elongated hole, the sliding movement of the swing shaft can be temporarily restricted by the action of the urging force by the urging means.

In the case of the above configuration, the swing axis, which is the center of swing of the swing member, is moved linearly in the forward and backward directions by sliding it along the first elongated hole provided in the base. Furthermore, by sliding it along the third elongated hole, it can be moved in a direction away from the base plate. Since this third elongated hole is extended in a relatively short length, the swing shaft moved to this third elongated hole can slide more widely than in the first elongated hole. It is not a thing, but something that is locked when it reaches its tip. Furthermore, since the biasing force by the biasing means is in the same direction as the biasing direction for the swinging shaft that slides into contact with the first elongated hole, the biasing force is applied when the swinging shaft is moved to the third elongated hole. By this action, the swing shaft can maintain a state in which it is in contact with the tip of the third elongated hole (a locked state). Therefore, the sliding movement of the swing shaft is temporarily restricted. This temporary restriction of the sliding movement of the swinging shaft causes the swinging member to lock the piece to be locked, since the swinging member is in a far backward position than when it moves forward along the first elongated hole due to the force. It is intended to maintain a state in which it does not occur. Note that the shaft support part is provided with a second elongated hole, and this second elongated hole is used to change the center of swing of the swinging member, and to change the urging force of the urging means into the second elongated hole. It is provided to act on the second oblique area, and is not used in combination with the third long hole to adjust the distance from the base plate.

In the invention having the above configuration, the base portion includes a bottom portion on the side opposite to the side that locks the free end of the sliding door, and the biasing means is configured to support the biasing member formed in the biasing receiving portion. The transmission device may be configured to include a plate-shaped transmission member disposed so as to be able to come into contact with one of the oblique regions, and a compression spring that applies a pressing force between the bottom portion of the base portion and the transmission portion. In this case, the bias receiving portion is bent in the longitudinal direction of the swing member so as to be continuous with the front end of the first oblique region and bent toward the front end side of the swing member. A second slanted area is formed that is inclined at an acute angle, and the transmission member has a first contact area that abuts the first slanted area and a second slanted area that abuts the second slanted area. The second contact area is continuous with the first contact area and has a plate thickness that gradually decreases toward an edge located on the opposite side of the base plate. The surface facing the second contact area may be formed in a tapered shape so as to be thin.

In such a configuration, the compression spring applies a biasing force in one direction to the plate-shaped transmission member constituting the biasing means, and the first contact area of the transmission member In addition to the state in which the second contact region contacts the first inclined region, a state in which the second contact region contacts the second inclined region can occur. Since the first inclined region is inclined at an acute angle with respect to the direction perpendicular to the longitudinal direction of the swinging member, the state in which the transmission member that is in contact with the inclined region is pressed basically means that the swinging member is pressed. A biasing force is applied toward the tip of the member in the longitudinal direction. In addition, since it is inclined at an acute angle with respect to the orthogonal direction, the swinging movement around the axis of the swinging center is induced in accordance with the inclination. On the other hand, since the second inclined region is based on the longitudinal direction of the swinging member, it basically urges the swinging member upward when the swinging member is in a tilted position. becomes. Furthermore, by providing the position where the second inclined region is formed closer to the free end of the swinging member than the center of swing in the tilted position of the swinging member, a biasing force is applied to continue the tilted position. be able to.

In each of the above-mentioned inventions, the base plate may include a mounting part for mounting on the column, and in this case, the mounting part extends through the base plate main body in a circular manner. a circular plate-shaped pressing part having an outer circumferential surface that can come into contact with the inner circumferential surface of the tapered hole; and a fastening means inserted into the adjustment hole, and by adjusting the insertion position in the adjustment hole by the fastening means and the direction of the adjustment hole, the columnar body can be fixed. The base plate may be attached to the column by tightening the fastening means while aligning the fastening means with a preset fastening position, and pressing the base plate via the pressing portion.

According to the above configuration, the longitudinal direction of the long hole extending through the pressing part in the radial direction can be adjusted to different angles by rotating the pressing part in the circumferential direction. Furthermore, since the fastening means can be inserted within the range where the long hole is formed, it is possible to fix the fastening member in any position within the range where the long hole moves due to the rotation of the pressing part. becomes. Therefore, when installing a locking device of each of the above configurations in place of a locking device that is already installed (e.g. Ebikin, etc.), the base plate should be aligned with the existing fastening position provided on the supporting column. can be fixed to the column. Furthermore, it is also possible to adjust the relative positional relationship of the locking portion to the locus of movement of the locked piece, making it possible to effectively perform the function of the locking device.

According to the present invention, the to-be-latched piece is in a locked state when the locking portion formed on the tip end side of the swinging member appears within the movement locus area of the to-be-latched piece, so the operator can The locking state will not change depending on the degree of operation. Furthermore, since the locking portion of the swinging member is biased in the direction in which it appears within the movement locus area of the locked piece by the biasing force of the biasing means, the locking portion of the swinging member is biased until the external force on the swinging member disappears. By moving the locking piece, the locking state becomes reliable.

Furthermore, in the invention in which the locking part is configured to form a locking area and a contact area, in a situation where the locking part exists within the movement locus area of the locked piece, the contact member prevents the contact of the locked piece. Since the posture of the swinging member is changed by the external force applied at that time, it is possible to lock the locked piece without requiring any manual operation of the swinging member. With such a locked state, the same locked state can always be achieved. In addition, in the case of a structure in which the urging force of the urging means is applied by two types of diagonal areas, when a plurality of locked pieces are provided on the swing door, temporary release of the locking part is possible. It also becomes possible to release the locking of a plurality of locked pieces at once.

FIG. 2 is an explanatory diagram showing the form of a swing door used in a vehicle. It is an explanatory view showing the whole structure of an embodiment concerning a locking device. It is an explanatory view showing the whole composition of an embodiment concerning a locking device. It is an explanatory view showing the relationship between a rocking member and a biasing member. FIG. 6 is an explanatory diagram showing a state of change in the posture of the swinging member. FIG. 6 is an explanatory diagram showing a state of change in the posture of the swinging member. FIG. 3 is an explanatory diagram showing an operation mode during locking in an embodiment of the locking device. FIG. 3 is an explanatory diagram showing an operation mode during locking in an embodiment of the locking device. FIG. 6 is an explanatory diagram showing an operation mode when releasing the lock in the embodiment of the locking device. FIG. 6 is an explanatory diagram showing an operation mode when releasing the lock in the embodiment of the locking device. It is an explanatory view showing a first modification of the embodiment. It is an explanatory view showing a second modification of the embodiment. It is an explanatory view showing the usage mode in the 2nd modification of an embodiment. It is an explanatory view showing the usage mode in the 2nd modification of an embodiment. It is an explanatory view showing a third modification of the embodiment. It is an explanatory view showing the usage mode by the 3rd modification of an embodiment. It is an explanatory view showing a fourth modification of the embodiment. It is an explanatory view showing the operation mode of the 4th modification. It is an explanatory view showing the operation mode of the 4th modification. FIG. 7 is an explanatory diagram showing another modification of the embodiment. It is an explanatory view showing a modification of a rocking member of an embodiment. It is an explanatory view showing a modification about a rocking axis of an embodiment.

Embodiments of the present invention will be described below based on the drawings.
<Form of fan door>
The present invention relates to a locking device for a swing door, and the swing door constitutes a cargo platform portion of a vehicle. Therefore, FIG. 1 shows a typical vehicle having a swing door. FIG. 1(a) shows a type of truck called a flat body, and FIG. 1(b) shows a type of truck called a wing body.

As shown in FIG. 1(a), the loading platform 1 of the flat body type truck TR1 has sliding doors around the loading platform surface 11, particularly on the two sides 12a, 12b and the rear 12c excluding the driver's seat side. There is. These swing doors 12a, 12b, and 12c have pillars (column-shaped members provided for support, meaning pillars for support, hereinafter sometimes abbreviated as pillars) at both side ends of each. .) By being supported by 15a to 15d, it functions as a wall surface, and together with the loading platform surface 11, it is configured to ensure loading capacity.

These swing doors 12a to 12c are connected to the vehicle body at the lower edge by pivot supports (hinge etc.) 13, 14, and when both side ends are not supported (open state), The hinges, etc. 13, 14 can be reversed around the rotation axes, and when loading and unloading a load, the user can reverse the hinges, etc. 13, 14 to swing the doors 12a to 12c. The load is placed on the unpartitioned (flat) platform surface 11, or the loaded object is lowered from the platform surface 11 in a suspended state. In particular, when a forklift or the like is used, the items can be loaded and unloaded on a pallet, so such usage is frequently performed.

Also, in the loading platform 2 of the wing body type truck TR2 as shown in FIG. 1(b), the lower wall surfaces of the wing doors 20b and 20c are formed by swing doors 22a and 22b, except for the rear door 20a. be. Even in this case, by opening the sliding doors 22a, 22b around the hinges 23, 24, the loading platform surface 21 can be used in a flat state. In addition, since the wing body type truck TR2 has a relatively long overall length, an intermediate column (a type of column) 25a is installed on the side of the loading platform 2, and multiple swing doors (not shown in the figure) are installed on the side of the loading platform 2. One side end of the two sheets 22a and 22b is locked. This intermediate column 25a is also rotatably connected to the lower end by a hinge or the like 26, and after releasing the locking of the swing doors 22a and 22b, this intermediate column 25a can also be reversed as necessary to allow the loading platform surface to 21 can be in a flat state. Naturally, there are cases in which the intermediate pillar 25a is placed in an upright position and only one of the two swing doors 22a, 22b is opened.

The swing door locking devices A and B according to the present invention are used in the various trucks TR1 and TR2 as described above, and are installed at both ends of these swing doors 12a to 12c, 22a, and 22b. It is. Therefore, the locking devices A and B are installed exclusively on the supports 15a to 15d, 25a, and 25b, and if there is no support, they are installed on an alternative (such as the frame of the rear door 20a) 25c that can function as a support. , both side ends of the swing doors 12a to 12c, 22a, and 22b are locked.

<Embodiment of locking device>
Therefore, embodiments of the locking device of the present invention will be described in detail with reference to FIGS. 2 to 4. Note that FIG. 2 is an exploded perspective view of this embodiment, and FIG. 3 is an assembled perspective view. Moreover, FIG. 4 is a diagram showing partial relationships. As shown in these figures, the locking devices A and B of this embodiment can be roughly divided into a plate-shaped base plate 3, a base 4 provided integrally with this base plate 3, and a base 4 provided on this base 4. It is comprised of a swinging member 5 to be mounted and a biasing section (biasing means) 6 that biases the swinging member 5.

The base plate 3 is to be attached to the surface of the columns 15a to 15d, 25a to 25c (see FIG. 1), and is formed into a thin plate that is elongated in the longitudinal direction (generally in the vertical direction) of the columns. It is something that In this embodiment, a structure made of a laminate of two plate-like members 30a and 30b is illustrated, but it may be formed of a single plate-like member or even a multilayer structure. good. In this embodiment, in order to ensure strength, including the contact portion with the locked piece 7 of the sliding door, the area where a load can be applied is made into a double structure and the wall thickness is increased.

In this embodiment, as a mechanism for attaching the base plate 3 (lower plate 30a) to the supports 15a to 15d, 25a to 25c (see FIG. 1), circular structures are provided near both longitudinal ends of the lower plate 30a. Tapered through holes (tapered holes) 31 and 32 having tapered surfaces whose diameters gradually become smaller from the front surface to the back surface are provided, and through pressing portions 33 and 34 that match the tapered holes 31 and 32, It is configured so that it can be tightened by That is, the pressing parts 33 and 34 are circular plate-shaped with the same diameter as the tapered hole, and the outer circumferential surface is formed in a tapered shape with the same slope as the tapered surface (inner circumferential surface) of the tapered holes 31 and 32. , the pressing parts 33 and 34 can be fitted into the tapered holes 31 and 32. By pressing the pressing parts 33 and 34 toward the pillars, the lower plate 30a is fixed in a state where it is held between the pillars and the pressing bodies 33 and 34.

In addition, through holes 35 and 36 are bored in the pressing parts 33 and 34, and fastening means (bolts, etc.) 37 and 38 are inserted into the through holes 35 and 36, and the fastened parts on the pillar side are inserted. By fastening (screwing, etc.) the fastening means 37 and 38 to (female screws, etc.), the lower plate 30a can be fixed by the pressing bodies 33 and 34. Here, the through holes 35 and 36 are elongated holes (adjustment holes) extending through the pressing portions 33 and 34 in the radial direction with appropriate lengths. The radially elongated adjustment holes 35 and 36 may be arranged in a diametrical direction passing through the center of the circle, or may be eccentric. By providing such adjustment holes 35 and 36, by rotating the pressing parts 33 and 34 in the circumferential direction, the position of the fastening means 37 and 38 to be used can be adjusted to the position of the fastened part on the pillar side. be able to. In addition, since the locking devices A and B are devices for locking the locked piece 7, in order to improve the locking state by the locking portion 51a, which will be described later, it is necessary to adjust the position where the locking devices are installed. It is used for adjustment.

Note that the base plate 3 (upper layer plate 30b) having the above configuration is provided with a protrusion 39 that partially protrudes. This is to prevent the locked piece 7 from changing its position (sliding or moving in parallel) on the surface of the base plate 3 (upper plate 30b). That is, a generally U-shaped notch 71 is formed in a general (particularly existing) locked piece 7 (see FIG. 3), and a protrusion 39 is formed inside this notch 7. Due to this arrangement, sliding contact of the locked piece 7 with the protrusion 39 is restricted. The cutout 71 of the locked piece 7 is for inserting a hook in a locking device such as a metal cover, and is provided so that the protrusion 39 can perform the same function as the hook.

The base portion 4 is substantially configured such that two side portions 40a, 40b and a bottom portion 40c are erected in a substantially U-shape on the base plate 3 (upper plate 30b). The two side parts 40a, 40b are provided with a width that allows the swinging member 5 to fit gently into them, and both sides have a length that is the same in width and length and that is elongated in the same direction. Elongated holes (first elongated holes) 41a and 41b are formed so that their longitudinal directions are parallel to the base plate 3. The swing shafts 42 are simultaneously inserted into the elongated holes 41a and 41b, and the swing member 5 is inserted therethrough, so that the swing shafts 42 function as central axes (centers of swing) when the swing member 5 swings. be able to. Note that the bottom surface portion 40c of the base portion 4 serves as a reference for biasing by the biasing portion (biasing means) 6, and this will be explained later. Further, a front frame portion 40d is provided at the tip edge of the bottom portion 40c and extends over the side portions 40a and 40b, forming a box shape with a shallow bottom. The function of this front frame portion 40d will also be described later.

The swinging member 5 is provided with an appropriate length, and roughly divided into a locking portion 51 and an operating portion 52 are formed. Since the locking portion 51 functions to lock the locked piece 7, it is formed by integrally joining two plate-like members in order to obtain appropriate strength. On the other hand, the operating section 52 has a basically flat plate shape. Moreover, in this embodiment, a configuration is illustrated in which a shaft support portion 53 is formed on each of two pieces of the locking portion 51 (see FIGS. 2 and 4). This shaft support portion 53 is provided with a through hole (second elongated hole) 54 through which the aforementioned swing shaft 42 can be inserted, and the swing shaft 42 is inserted into the through hole (second elongated hole) 54. By doing so, the entire swing member 5 is configured to swing via the swing shaft 42. Note that the reason why the through hole (second long hole) 54 is made long will be described later.

In this way, the swinging member 5 is provided so as to be swingable as a whole, but with the shaft support portion 53 (substantially the center of swinging by the swinging shaft 42) as a boundary, there are The end side rotates in the opposite direction, the front end side (the side closer to the locked piece 7) becomes the locking part 51, and the rear end side (the side far from the locked piece) becomes the operating part 52. The locking portion 51 on the distal end side is provided for contact or abutment with the locking piece 7, and is a portion directly involved in locking the locking piece 7.

The locking portion 51 is further divided into a locking region 51a and a contact region 51b, and a sliding contact region 51c is divided in between. The locking area 51a is a specific area for locking the locking piece 7, and may be any area as long as it has an appropriate contact area, and as shown in FIG. Can be configured. This locking area 51a (the plane part of the locking area 51a) is a locked piece located between the two while facing the surface of the base plate 3 when the swinging member 5 is in an upright state (the longitudinal direction is approximately parallel to the base plate 3). A gap corresponding to the wall thickness of 7 is formed.

The contact area 51b is a specific area that exists on the movement trajectory of the locked piece 7 when it approaches the base plate 3 for locking, and is intentionally contacted. Intentionally being contacted by the locked piece 7 means receiving an external force from the locked piece 7 to change the position or posture of the swinging member. Although the specific contact state will be described later, the contact area 51b has a cross-sectional shape such that the distance from the center of swing (swing shaft 42) gradually increases toward the tip of the swing member 5. The entire surface is shaped like a quadratic curve. By forming the contact area 51b with the above-mentioned curved surface, when the contact area 51b is contacted by the locked piece 7, the swinging member 5 can be appropriately swung while reducing the impact.

The sliding contact area 51c is a specific area that allows sliding contact of the locked piece 7 between the locking area 51a and the contact area 51b, and basically, the sliding contact area 51c is a specific area that allows sliding contact of the locked piece 7. The positional relationship guides the attitude of the swinging member 5 (particularly the moving direction of the locking part 51). Although these contact areas 51b and sliding contact areas 51c are shown as planar in FIG. 4, they do not need to be planar as long as contact or sliding contact is possible.

The operation section 52 is for enabling manual operation, and its shape etc. are not particularly limited as long as it has an appropriate length. However, the vicinity of both widthwise end edges 52a and 52b on the back side of the operating portion 52 abut against the side surfaces 40a and 40b of the base 4, and function to stop the swinging of the swinging portion 5 in the upright state. ing. As described above, when the swinging member 5 is in the upright state, the locking region 51a of the locking portion 51 forms a predetermined gap with the surface of the base plate 3, so the gap is stably created. This is ensured by the vicinity of both end edges 52a and 52b of the operating section 52. Note that the operating portion 52 is provided with a penetrating portion 52c. This penetrating portion 52c can be used exclusively for the purpose of passing a finger through for convenience of operation by the operator, but when the penetrating portion 52c is formed to be large, the lower part of the base plate 3 covered by the swinging member 5 is opened. This can be used for attaching the pressing portion 34 to the one (lower) tapered hole 32 and attaching the fastening means 38. This can be especially convenient when inserting a box wrench. However, the penetrating portion 52c is not an essential structure, and may be modified as appropriate if there is a structure that facilitates human operation or use of a wrench.

The biasing receiving portion 55 receives the action of a biasing force from a biasing portion (biasing means) 6, which will be described later. Although the position where the bias receiving part 55 should be provided is not particularly limited, in this embodiment, it is provided near the shaft support part 53. The reason for this is that since the biasing force applied to the swinging member 5 is based on the base 4, the swinging member 5 is provided at a position where the biasing force can be applied to the swinging shaft 42 inserted through the base 4. The bias receiving portion 55 is divided into two diagonal regions 55a and 55b. Both of these oblique regions 55a and 55b urge the swing shaft 42 in the direction along the long holes (first long holes) 41a and 41b of the base 4, and It urges the swinging member 5 to also shift its position. At the same time, one slanted area (first slanted area) 55a acts on the swinging member 5 in the direction of the upright state, and the other slanted area (second slanted area) The slanted region) 55b urges the swinging member 5 in the direction of the tilted state (from the upright state to the angled state).

The biasing portion (biasing means) 6 uses a compression coil spring 61 as a central element for generating biasing force. One end (lower end portion) of this compression coil spring 61 is disposed on the bottom surface portion 40c of the base portion 4, and is installed in a fixed position. On the other hand, the other end (upper end) of this compression coil spring 61 is disposed on one surface (lower surface) of a transmission member 62 formed in a plate shape in order to transmit the biasing force to the swinging member 5. It is installed so that it can be moved (raised and lowered). The other surface (upper surface) of the transmission member 62 is in sliding contact with the biasing receiving part 55 formed on the swinging member 5, and the biasing force of the biasing part (biasing means) 6 is The force is transmitted to the bias receiving portion 55 via the transmission member 62.

Further, the biasing portion (biasing means) 6 is provided with a rod 63 through which the transmission member 62 is inserted, and an insertion portion 64 for the swing shaft 42 is integrally provided at the tip (upper end) of the rod 63 . The rod 63 is inserted into the cylindrical interior of the compression coil spring 61, and basically acts on the biasing force (specifically, the repulsion force accompanying elastic deformation due to compression) received by the deformation (compression) of the compression coil spring 61. It regulates the direction. That is, this rod 63 is arranged so as to pass through a through hole 43 provided in the bottom surface 40c of the base 4, and by sliding inside the through hole 43, it changes the direction of the biasing force. is regulated. Since the insertion portion 64 is integrally provided at the tip of the rod 63, when the swing shaft 42 is inserted inside the rod 63, the rod 63 is held in a predetermined position by the through hole 43 and the insertion portion 64. It is maintained in the direction of , and is linked to the swing shaft 42 that moves along the elongated holes (first elongated holes) 41a and 41b of the base 4. Further, the transmission member 62 moves (raises and lowers) in conjunction with the movement of the insertion portion 64.

The biasing force of the biasing portion (biasing means) 6 (repulsive force of the compression coil spring 61) acts on the swinging member 5 (biasing receiving portion 55) via the transmission member 62, and based on the biasing force, When the swinging member 5 swings in response to an external force (e.g., by the operation unit 52), the transmission member 62 changes its angle depending on the state of the swing. (The angle of the rod 63 also changes depending on the situation) However, the position of the insertion portion 64 does not change. On the other hand, when the swinging member 5 moves along the longitudinal direction of the long holes (first long holes) 41a and 42b via the swinging shaft 42 based on the biasing force, or when the swinging member 5 moves due to external force, When moving against the force, the insertion portion 64 also moves in conjunction with the movement of the swing shaft 42.

As described above, the transmission member 62 is brought into sliding contact with the biasing receiving portion 55 of the swinging member 5, but the biasing receiving portion 55 is connected to the first diagonal region 55a and the first diagonal region 55a as described above. It is divided into two diagonal regions 55b, and different rocking motions are produced by selecting the side on which the biasing force is applied.

Therefore, by bringing the transmission member 62 into sliding contact with one of the two oblique regions 55a and 55b, it is determined whether the swinging member 5 is guided to the upright state or to the inclined state. It has become a thing. That is, since the biasing force of the compression coil spring 61 primarily acts on the transmission member 62, this transmission member 62 slides into contact with either one of the two oblique regions 55a, 55b of the bias receiving portion 55. This determines the biasing direction with respect to the attitude of the swinging member 5.

Note that the above-mentioned selection of the oblique regions 55a and 55b is such that the swing shaft 42 inserted through the elongated hole (second elongated hole) 54 provided in the shaft support portion 53 of the swing member 5 is This is by displacing it along the longitudinal direction. This displacement occurs due to a change in the relative positional relationship between the swinging member 5 and the base plate 3 (or the base 4), and specifically, when the swinging member 5 approaches the base 4 (normal state) Then, when the swinging member 5 is in sliding contact with the first diagonal region 55a and is displaced in the direction away from the base 4, it is in sliding contact with the second diagonal region 55b. In addition, the through hole for inserting the rod 63 into the transmission member 62 is long enough to accommodate changes in the insertion position due to changes in the angle of the rod 63, changes in the sliding position of the transmission member 62, etc. It is provided as a hole.

Furthermore, although the locking portion 51 and the operating portion 52 of the swinging member 5 are integrally provided, a rib member 56 is provided to ensure the integrity of the two, and reinforcing the operating portion 52. In order to do this, bent portions 57 and 58 are also formed on both sides (see FIG. 4(a)). Depending on the material of the swinging member 5, the rib member 56 and the bent portions 57, 58 may not be necessary, but the rib member 56 is configured to also function as a stopper, which will be described later.

<Change in posture of swinging member>
In this embodiment, since the structure is as described above, the swinging member 5 can be changed into a complicated posture. That is, as shown in FIG. 5, in addition to the case in which the swinging member 5 is raised and lowered in the upright state, the swinging member 5 can be swinged into a tilted state as shown in FIG. Note that, in order to show the range in which the swinging member can be raised and lowered in the upright state, FIG. be.

First, a case in which the swinging member 5 moves up and down will be described. As shown in FIG. 5, in a state in which the urging force of the urging portion (biasing means) 6 is most effectively acting on the swinging member 5 (see FIG. 5(a)), the swinging shaft 42 is is located above the first elongated hole 41 (hereinafter, 41a and 41b are collectively referred to as 41), and the locking region 51a of the locking portion 51 can face the surface of the locked piece 7. It will rise to the state. In this state, the locked piece 7 can be locked by the swinging member 5 (locking portion 51). Note that when the locked piece 7 is not locked, the biasing force of the biasing portion (biasing means) 6 is applied, and no external force is applied to resist the biasing force. This is the initial state (basic form).

As is clear in this initial state, the rod 63 of the biasing part (biasing means) 6 has one end (upper end) limited by the swing shaft 42 and the other end (lower end) provided on the bottom surface 40c of the base 4. It is inserted into the through hole 43 and is slidable therein, and is maintained in a state generally parallel to the base plate 3 (upright state) as a whole, and is attached to the swinging member 5 in the upright state. It is designed to guide the force upwardly (towards the locked piece 7). Further, the biasing force acts on the swinging member 5 (particularly the locking portion 51) via the transmission member 62. This transmission member 62 is inclined in a state in which it is in contact with the first oblique region 55a, and the urging force by the urging portion 6 raises the lower side (left side in the figure) of the inclined transmission member 62. It will act to make it happen. Therefore, in the illustrated state, the swinging member 5 acts to swing in a direction in which the locking part 51 is moved away from the base plate 3 and in a direction in which the operating part 42 is moved closer to the base plate 3. . Note that, at this time, the swinging of the swinging member 5 is restricted with the back side of the operating portion 52 in contact with the surface of the front frame portion 40d of the base 4. Further, in the area where the front frame portion 40d does not exist, parts 52a and 52b of the back side of the operating portion 52 (near both end portions) are in contact with the edge of the base portion 4. This contact between the two members 4 and 5 allows the swinging member 5 to maintain a stable posture in the upright state.

In the above initial state, the swinging member 5 can be lowered by moving the swinging shaft 42 below the first elongated hole 41 (see FIG. 5(b)). Note that, in FIG. 5(b), the contact state between the base 4 and the swinging member 5 is not taken into account. In this state, the locking portion 51 can move in the direction of sinking from the position where the locked piece 7 can exist (the movement locus area of the locked piece 7). In the posture of the swinging member 5 in the illustrated state, the uppermost end of the locking portion 51 remains slightly within the region of the locus of movement of the locked piece 7; 42 has not reached the lowest point of the first elongated hole 41. Therefore, by moving the swing shaft 42 to the lower limit of the first elongated hole 41, the uppermost end of the locking portion 51 can be brought out of the movement locus area of the locked piece 7. As shown in the figure, the state in which the uppermost end of the locking portion 51 remains slightly within the movement locus area of the locked piece 7 is when the locked piece 7 approaches the base plate 3 to be locked. , or when separating from the base plate 3 to release the lock, a part of the locking portion 51 can come into contact with the locked piece 7 . Moreover, such a posture of the swinging member 5 occurs when an external force acts in a direction that resists the urging force of the urging portion (biasing means) 6, and it moves downward against the urging force. At the same time, the rod 63 also descends and becomes in a state where it largely protrudes from the bottom surface portion 40c of the base portion 4.

Further, in a state in which the swinging member 5 is moved in a direction away from the base plate 3 along the second elongated hole 54 with reference to the swing shaft 42 (see FIG. 5(c)), the locking portion 51 can be lowered further. Since the second elongated hole 54 provided in the swinging member 5 is provided to be elongated in the inclination direction, the swinging shaft 42 does not move and only the attitude of the swinging member 5 changes. In this state, since the swinging member 5 further descends, the uppermost end of the locking portion 51 is not in a position where it can reach the locked piece 7, and has completely escaped from the movement locus area of the locked piece 7. It is a state.

Next, a state in which the swinging member 5 swings in addition to the movement (lowering) of the swinging member 5 described above will be described. FIG. 6(a) shows a state in which the swinging member 5 shown in FIG. 5(b) is swung, and FIG. 6(b) shows a state in which the swinging member 5 shown in FIG. 5(c) is swung. It is. Considering the contact between the base 4 and the swinging member 5, this shows the original form when the swinging member 5 is lowered.

As shown in FIG. 6(a), when the swinging member 5 is swung along the first elongated hole 41 with the swing shaft 42 being lowered to be in the tilted state, the locking A boundary point 50 between the region 51a and the sliding contact region 51c can tilt the swinging member 5 until it reaches the surface of the base plate 3. At this time, the transmission member 62 of the biasing portion (biasing means) 6 is in contact with the first oblique region 55a, and since the transmission member 62 is in a greatly inclined state, this This causes the swinging member 5 to rotate (swing) in the opposite direction with respect to the oblique area 55a, that is, to act in the direction in which the swinging member 5 is in the upright state. Further, as a matter of course, the biasing force acts in a direction that raises the swinging member 5 as a whole.

Further, if the locked piece 7 is present at a predetermined position, the sliding contact area 51c of the locking portion 51 is in a state where it is partially in sliding contact with the locked piece 7. Due to such sliding contact, when the swinging member 5 receives the biasing force from the biasing portion (biasing means) 6 as described above and changes its posture upward and toward the upright state, the sliding contact area 51c is engaged. Depending on the relationship with the stopper piece 7, the direction will be regulated. As a result, the sliding contact area 51c is in sliding contact with a part of the locked piece 7, and the sliding member 5 can change its posture as the sliding contact position is changed to an acceptable state. Become something.

Then, as shown in FIG. 6(b), the swinging member 5 is moved along the second elongated hole 54 from the above state (or the swinging member 5 is moved from the state of FIG. 5(c)). ), when the swinging member 5 is placed in an inclined state in a situation where the swinging member 5 is separated from the base plate 3, the boundary point 50 between the locking area 51a and the sliding contact area 51c slightly lowers, and the swinging Since the center of swing (swing center) of the member 5 moves, the inclination state also changes (inclines significantly). Furthermore, with these changes in position, etc., the transmission member 62 of the biasing portion (biasing means) 6 comes into sliding contact with the second oblique region 55b, and the inclination state of the transmission member 62 changes. It will be done. As shown in the figure, since the side of the transmission member 62 that is far from the base plate 3 is the lower part, a biasing force acts to push up this lower part, and as a result, the swinging member 5 is biased toward the tilted state. That will happen. Naturally, the biasing force at this time also acts on the swinging member 5 upward (in the upward direction).

Due to the action of the biasing force as described above, if the locked piece 7 is present at a predetermined position, only a small part of the sliding contact area 51c of the locking part 51 will partially contact the locked piece 7. It will be in a state where it can be slid into contact with. Therefore, the biasing force on the swinging member 5 to the inclined state reaches its limit when the boundary point 50 is in contact with the base plate 3, and the biasing force upward (in the upward direction) is limited when the sliding area 51c is in the locked position. Since the limit is reached when it is in sliding contact with 7, the posture of the swinging member 5 is stably maintained in that state.

As described above, the swinging member 5 not only changes its posture by swinging itself, but also changes its posture in a complicated manner depending on the situation in which the urging force of the urging section (biasing means) 6 acts. Therefore, by utilizing such a change in posture, it is possible to allow the locked piece 7 to be locked and to maintain the locked state of the locked piece 7. Note that although the swing shaft 42 is inserted through the first elongated holes 41a and 41b in order to regulate the direction of movement of the swing member 5, this is just one example, and the biasing force may be applied by other methods. It is also possible to raise and lower it while receiving the pressure. For example, the swing shaft may be slid along a regulation rail, or may be moved inside a cylindrical body having a predetermined shape. Further, the second elongated hole 54 may not be provided in particular, and when the door is to be unlocked only by manual operation, the swinging member 5 can be moved up and down. It is also possible to limit the structure to one in which only the force is allowed and a biasing force can be applied.

<Operation mode>
Therefore, in the embodiment configured as described above, the operation mode when the locked piece 7 is locked or unlocked as the posture of the swinging member 5 changes will be explained. 7 and 8 show the operation mode when the locked piece 7 is accepted (locked), and FIGS. 9 and 10 show the operation mode when the locked piece 7 is released from the lock. It shows.

First, the operation mode when locking the locked piece 7 will be explained. As shown in FIG. 7(a), before locking, the swinging member 5 is in a stable posture in the initial state (upright state), and the locking portion 51 is in the movement locus area of the locked piece 7 ( It is now appearing in front of the area you are planning to move. In this state, movement of the locked piece 7 is waited. Note that the locus of movement of the locked piece 7 is arc-shaped because the swing doors 12a to 12c, 22a, and 22b rotate around the hinges 13, 14, 23, and 24 (see FIG. 1). However, in the figure, it is shown in a state of almost parallel movement. Furthermore, as described above, the locked piece 7 is formed with a substantially U-shaped notch 71 (see FIG. 3). Since the locked piece 7 is locked with the protrusion 39 disposed inside the notch 7, the locking part 51 of the swinging member 5 is exclusively located below the notch 71. It is arranged so as to lock the piece 7 to be locked. Furthermore, since the locked piece 7 is formed of a plate-like member, the locking part 51 is brought into contact with one surface side (front surface) 70a, and the other side (back surface) 70b is brought into contact with the locked piece 7. It is brought into contact with the base plate 3 and held between them. Note that the surfaces do not necessarily need to be in contact with each other, and the locked state can be achieved by stopping at least at positions where the surfaces face each other.

As shown in FIG. 7(b), when the locked piece 7 approaches the base plate 3 from the above state, a part of the back surface 70b of the locked piece 7 touches the locking part 51 of the swinging member 5. It comes into contact with the contact area 51b formed in . Since this contact area 51b is oblique to the moving direction of the locked piece 7 and has a curved surface shape, the external force received as the locked piece 7 moves is applied in an oblique direction. That will happen. This external force acting in the diagonal direction results in downward and sideways force distribution, which induces the swinging member 5 to move downward and rotate clockwise in the figure. At the same time, the locked piece 7 further moves so as to move the contact position while sliding on the surface of the contact area 51b having the curved surface (quadratic curved cross section).

FIG. 7(c) shows a state in which the locked piece 7 has moved. As shown in this figure, a downward external force causes the swinging member 5 to move the swinging shaft 42 downward along the first elongated hole 41, and a lateral external force causes the swinging member 5 to move down. It swings around the swing shaft 42 as the center of swing. Therefore, the swinging member 5 is in an inclined state, and the operating section 52 moves in a direction away from the base plate 3. On the contrary, a part of the locking part 51, specifically, a boundary point 50 between the locking area 51a and the sliding contact area 51c approaches the base plate 3, and this boundary point 50 comes into contact with the surface of the base plate 3. In this state, the swinging member 5 stops swinging. After that, the swinging member 5 is only allowed to descend.

Therefore, as shown in FIG. 8(a), the swinging member 5 moves downward, and the uppermost end of the locking portion 51 comes into contact with the lower surface (lower surface) 70c of the locked piece 7, and the corresponding The locked piece 7 passes through the swinging member 5 and is in a state where it can reach the base plate 3. In this state, the swinging member 5 that receives the biasing force of the biasing portion (biasing means) 6 is biased so as to return to the upright state.

Then, as shown in FIG. 8(b), when the lower surface 70c of the locked piece 7 passes the uppermost end of the locking part 51, it swings due to the urging force of the urging part (biasing means) 7. The member 5 moves upward, and the sliding area 51c of the locking part 51 comes into sliding contact with the position of the locked part 7. On the other hand, the locked piece 7 is in a state in which the back surface 70b has been moved to near the surface of the base plate 3. In this state, the sliding contact area 51c is adjusted to be inclined obliquely upward with respect to the direction away from the base plate 3, and the sliding area 51c is adjusted to be inclined diagonally upward with respect to the direction away from the base plate 3, and the urging portion ( Since the urging force by the urging means) 6 acts continuously, the swinging member 5 changes its posture along the inclination direction of the sliding contact area 51c, and gradually returns from the inclined state to the upright state. , the vertical positional relationship will also be changed upward.

When the posture of the swinging member 5 is restored to the original upright state, the back surface 70b of the locked piece 7 reaches the surface of the base plate 3, as shown in FIG. 8(c), and the swinging member The locking region 51a formed in the locking portion 51 of No. 5 is in a state facing the surface of the base plate 3. As a result, the locking area 51a appears on the surface 70a of the locking piece 7 with an appropriate protrusion length while facing the surface 70a, thereby restricting the movement of the locking piece 7. In this state, the locked piece 7 is locked. That is, the swinging member 5 must swing in order to change its posture to the tilted state, but in order to swing, the movement of the locking portion 51 is restricted by the locked piece 7, and the locked piece As long as 7 exists, the swinging member 5, which remains at the same height, cannot swing and is never unlocked. On the other hand, in order to move downward, the biasing force of the biasing portion (biasing means) 6 is acting, so unless it receives some external force (unless it is intentionally lowered), it will not be able to move.

In this way, the posture of the swinging member 5 is stabilized when the locked piece 7 moves between the base plate 3 and the locking piece 51 of the swinging member 5, so the locked piece 7 is locked. This state will be maintained. Moreover, even if it is subjected to vibrations during movement, etc., the locked state will not be easily released. Note that, as shown in FIG. 8(c), the swinging member 5 is in an upright state and is urged in the upward direction by the action of the urging force by the urging portion (biasing means) 6. It is also assumed that the swinging member 5 may unintentionally move exclusively in the direction along the second elongated hole 54 due to vibrations received when the truck moves, pressure from the inside against the swing door (due to loaded cargo, etc.), etc. be done. Therefore, in this embodiment, the rib member 56 of the swinging member 5 is brought into contact with the front frame portion 40d of the base portion 5 to exhibit a stopper function. That is, in the state shown in the figure, the upper edge of the front frame portion 40d of the base portion 4 and the rib member 56 of the swinging member 5 are configured to face each other with an extremely small gap formed therebetween. In this state, when the swinging member 5 does not swing (because it cannot swing due to the clamping of the locked piece 7) and descends while maintaining the upright state, the tip edge of the rib member 56 4, and cannot be lowered. This makes it possible to prevent unexpected unlocking due to vibration or the like.

Next, the operating mode when releasing the lock will be explained. When releasing the locking of the locked piece 7, first, as shown in FIG. 9(a), the swinging member 5 (in particular, the operating section 52) is manually operated, and the supporting member functioning as the stopper is moved. In order to avoid contact between the swing member 56 and the front frame portion 40d of the base portion 4, the swing member 5 is simultaneously moved downward while changing its posture to an inclined state. In order to facilitate such operations, it is preferable that the operating section 52 has a suitable length and shape. For example, when starting an artificial operation using the operating section 52, the operating section 52 may be placed slightly closer to the base plate 3 so as to cause the swinging member 5 to swing slightly; Possible methods include curving the lower end of 52 toward base plate 3. In such a case, since a slight rocking operation is required when lowering the operating part 52, the swinging part 5 can be suitably moved without using the stopper function of the rib member 56. . As described above, if the swinging member 5 is lowered so as to move the swing shaft 42 to the lower limit of the first elongated hole 41, the locking portion 51 will be removed from the movement locus area of the locked piece 7. However, here, it is assumed that the swinging member 5 is not moved that far but is operated to be held in a temporarily fixed state (temporarily released state).

Further, as shown in FIG. 9(b), the swing member 5 is moved along the second elongated hole 54 provided in the swing member 5, starting from the swing shaft 42. Due to this movement, first, a part of the uppermost end of the locking portion 51 of the swinging member 5 comes into a state in which it slightly contacts the surface 70a of the locked piece 7. Second, the transmission member 62 constituting the biasing portion (biasing means) 6 changes from the state of sliding contact with the first diagonal region 55a of the swinging member to the state of sliding contact with the second diagonal region 55b. Move so that they are in sliding contact. By these changes, especially in the sliding contact areas 55a and 55b with which the transmission member 62 slides, the swinging member 5 that receives the biasing force can be changed from being biased toward the upright state to biased toward the tilted state (left side in the figure). (from a clockwise bias to a clockwise bias), the swinging member 5 is stabilized in an inclined state, and a part of the locking portion 51 is in a temporarily secured state in contact with the surface 70a of the locked piece 7. This is the result.

Note that changing the posture of the swinging member 5 to the temporarily fixed state as described above requires two steps of human operation (downward and swinging), as described above, if the steps are explained separately. However, except for the state in which the locking portion 51 of the swinging member 5 cannot be changed due to its relationship with the locked piece 7, the state shown in FIG. 9(b) can be changed by one human operation. It is something that can be done.

Such a temporary locking state is convenient because when locking one sliding door with a plurality of locking devices, each locking piece 7 is released from the locking devices at the same time. It's good. In other words, if the locked piece 7 of only one of the plurality of locking devices is unlocked, and the locked piece 7 of the other locking devices is locked, the swing door is completely locked. This is because it will be in a bent state. Furthermore, in some cases, the external force may be applied to the swinging member 5 again due to the restoring force against the deflection, and the swinging member 5 may be locked again, so this is effective for avoiding this. In the temporarily fastened state, the back surface 70b of the locked piece 7 remains in contact with the surface of the base plate 3.

From such a temporarily fixed state, as shown in FIG. 10(a), by moving the locked piece 7 away from the base plate 3 (in the direction of releasing the lock), the swinging member 5 can be moved. The locking portion 51 is guided toward the upright state as the locked piece 7 moves. At this time, the transmission member 62 of the biasing portion (biasing means) 6 is in sliding contact with the second oblique area 55b of the swinging member 5, and biases the swinging member 5 to the inclined state. However, the swinging member 5 is caused to swing against this urging force. Note that such forced movement of the locked piece 7 can be done by operating the swing door, especially when multiple locking devices are used for one swing door as described above. In this case, if the swinging members 5 of all the locking devices are temporarily locked and the swing door is operated, the locking of all the locking devices can be released at the same time.

When the swinging member 5 swings by the above operation until the locked piece 7 is released from the locking part 51 of the swinging member 5, the attachment is stopped as shown in FIG. 10(b). The transmission member 62 of the biasing portion (biasing means) 6 comes into contact with the first oblique region 55a of the swinging member 5 again, and the biasing force is applied to the swinging member 5 again toward the upright state. It acts to swing (rotate counterclockwise in the figure).

Then, in a state where the locked piece 7 cannot apply an external force to the swinging member 5, as shown in FIG. Since it is not restricted by the locking piece 7, the swinging member 5 moves in the direction approaching the base plate 3 along the second elongated hole 54, and the swinging shaft 42 moves toward the base plate 3 along the second elongated hole 54. When all these movements are completed, the swinging member 5 is restored to the same posture as the initial state (see FIGS. 5(a) and 7(a)). That will happen.

<Summary>
Since this embodiment has the above-described configuration, when locking the locked piece 7, the locking part 51 formed on the tip side of the swinging member 5 follows the movement trajectory of the locked piece 7. Since the operation is performed under the condition that the lock is located inside the area, it is possible to solve the problem that the locking state becomes insufficient due to the adjustment of the operator. That is, in the case of this embodiment, the locked piece 7 is either locked or not locked. Once the locking state is reached, the locking portion 51 of the swinging member 5 will swing because the locked piece 7 will be present between the locking portion 51 and the base plate 3. Since the member 5 cannot swing and the movement of the swinging member 5 is limited by the urging force of the urging section (biasing means) 6, an external force is intentionally applied to the swinging member 5. Otherwise, a situation where the locked state is accidentally released will not occur.

<First modification example>
Here, a modification of the above-described embodiment will be described. FIG. 11 shows a first modification. In this modification, the through hole 43 provided in the bottom surface portion 40c of the base portion 4 is made into a long hole. The long axis direction of the elongated hole is the direction in which the swinging member 5 swings. Providing such a through hole 43 means that the biasing portion (biasing means) 6 is applied to the first oblique region 55a (the state in which the swinging member 5 is directed to the upright state, FIG. 11(a)) and a state in which the biasing portion (biasing means) 6 acts on the second oblique region 55b (a state in which the swinging member 5 is biased toward the tilted state, FIG. (b)) produces a different effect.

That is, as shown in FIG. 11(a), when the biasing section (biasing means) 6 applies a biasing force to the first oblique region 55a, the swinging member 5 is placed in the upright state ( In order to bias the swing shaft 42 in the left rotation direction in the figure, the rod 63 of the biasing portion 6 is oriented substantially vertically (in the direction along the longitudinal direction of the swing member 5). Since the direction of the rod 63 is the direction in which the biasing force from the biasing portion 6 acts, the rod 63 is biased in the swinging direction (self-supporting state) according to the inclination angle of the first oblique region 55a and in the vertical direction. It is possible to simultaneously apply the bias to. At this time, the rod 63 is guided so as to be in a position perpendicular to the inclination angle of the first oblique region 55a (in the clockwise rotation direction in the figure as a reaction force of the biasing force on the swing shaft 42). Therefore, among the elongated holes of the through hole 43, it moves to the end farthest from the base plate 3. At this time, the rod 63 is adjusted so that its posture is approximately vertical.

On the other hand, as shown in FIG. 11(b), when the biasing portion (biasing means) 6 applies a biasing force to the second slanted region 55b, the swinging member 5 is guided to the tilted state. In order to bias the rod 63, the tip of the rod 63 is inclined in a direction approaching the base plate 3 (rotated in the left rotation direction in the figure about the swing shaft 42). This is because the rod 63 is guided to take a posture perpendicular to the inclination angle of the second oblique region 55b. Due to such an inclination of the rod 63, the biasing section 6 can exert a strong biasing force that guides the swinging member 5 to the tilted state (rotation direction to the right in the figure around the swing shaft 42). Become something. As a result, as long as the attitude of the swinging member 5 does not change to such an extent that the action of the urging force by the urging section 6 shifts to the first slanted region 55a, the swinging member 5 cannot maintain its inclined state. This can result in a configuration in which it is possible to easily detect that the locked piece is not yet locked.

<Second modification example>
Next, a second modification of the embodiment will be described. FIG. 12 shows a second modification. In this modification, a third elongated hole 45 is provided which is continuous with the first elongated hole 41 provided in the side surfaces 40a, 40b of the base 4. This elongated hole 45 is formed continuously with the first elongated hole 41 and extends from the lower end of the first elongated hole 41 in an acute angle direction. and the third elongated hole 45 form a substantially L-shape as a whole, and the swing shaft 43 can slide within this substantially L-shaped range.

Since the configuration and function of the first elongated hole 41 have already been described, the third elongated hole 45 will be mainly explained here. The third elongated hole 45 is continuous with the lower end of the first elongated hole 41 (the rear end of the elongated hole 41 that is elongated in the longitudinal direction of the swinging member 5). Further, the longitudinal direction of the third elongated hole 45 is at an acute angle with respect to the longitudinal direction of the first elongated hole 41, and the direction in which it extends is on the side away from the base plate 5. Note that the third elongated hole 45 is relatively short and has a sliding range that is approximately twice the diameter of the swing shaft 42. Further, although the extending direction is at an acute angle with respect to the first elongated hole 41, it does not have to be an extremely acute angle, and the angle may be slightly smaller than 90 degrees.

Since the third elongated hole 45 as described above is configured to be continuous with the lower end of the first elongated hole 41, the swing shaft 42 that slides in the third elongated hole 45 is 1 after reaching the lowest point. As described above, the state in which the swing shaft 42 reaches the lowest point of the first elongated hole 41 is a state in which the swing member 5 does not contact the locked piece. Therefore, the state in which the swing shaft 42 is slid into the third elongated hole 45 is a state in which the swing member 5 is not in contact with the locked piece.

<How to use>
The manner of use of the second modification is shown in FIGS. 13 and 14. Note that FIG. 13 shows a side view, and FIG. 14 shows a longitudinal section. As shown in FIG. 13, in the second modification, a first elongated hole 41 provided in the base 4 is provided with a third elongated hole 45 continuous thereto, and a swing shaft 42 is configured to be able to slide along both long holes 41 and 45. When no external force is applied to the swinging member 5, the swinging member 5 is guided upward by the urging means, and the swinging shaft 42 at this time is located at the top of the first elongated hole 41 (FIG. 13(a) reference). By lowering the swinging member 5 from this state, the swing shaft 42 can be moved to the lower end of the first elongated hole 41 (see FIG. 13(b)). At this time, since the swinging member 5 is in the lowest position, the swinging member 5 is unable to lock the piece to be locked, as described above. From this state, the swing shaft 42 can be removed from the first elongated hole 41 by moving the swing shaft 42 to the third elongated hole 45 while the swing member 5 is in the upright state. (See FIG. 13(c)). The swing shaft 42 that has separated from the first elongated hole 41 is urged upward by the urging means, so that it moves toward the inner edge of the third elongated hole 45 (approximately the tip of the third elongated hole 45). It will be pressed and loosely locked. Due to this gentle locking, the swing shaft 42 does not return to the first elongated hole 41, and is stabilized in this state.

The stable state in which the swing shaft 42 has moved to the third elongated hole 45 is a state in which the locked piece is unlocked by the swing member 5, and the sliding of the swing shaft 42 is stable. Since it is temporarily restricted, the locked piece is held in an unlatched state while the swinging member 5 is in the upright state. By maintaining this state, it is possible to create a situation in which the sliding door is intentionally not locked for a short period of time. This is to omit the locking and releasing operations when, for example, the vehicle is moved by a few meters (for example, when the parking position is slightly changed). This is especially provided to prevent the tip of the swinging member 5 from protruding from the side of the vehicle.

Therefore, the state in which the swing shaft 42 is moved to the third elongated hole 45 can be brought about only when the swing member 5 is intentionally operated. That is, the swinging member 5 is in a state where no external force is acting on it (the swinging member 5 is not being operated intentionally), whether the locked piece is locked or released. state), the urging force from the urging unit 6 acts on the swinging member 4 via the swinging shaft 42, forcing the swinging member 5 to move upward and swing to the upright state. (See Figure 14(a)). Even when the locked piece comes into contact with this, the direction of urging by the urging portion 6 does not change, and acts to restore the swinging member 5. Also, as a matter of course, even if the locked piece applies an external force to the swinging member 5 (particularly the locking portion 51), the swing shaft 42 is not connected to the third elongated hole 45. It cannot be moved.

Therefore, the swing shaft 42 can only be moved to the third elongated hole 45 by moving the swing shaft 42 by operating the operating portion 52 of the swing member 5 (see FIG. 14). b) and (c)). That is, when the operating section 52 is operated to lower the swinging member 5 and at the same time slightly guide the swinging member 5 into an inclined state, the swinging shaft 52 is moved to the lowermost end of the first elongated hole 41. The rib member 56 provided inside the swing member 5 and the tip of the front frame portion 40d of the base portion 4 can be brought into contact with each other. Note that the rib member 56 is provided to protrude from the back side of the swinging member 5 in order to maintain the strength of the swinging member 5, and when the swinging member 5 is provided with a thick wall, a part of the back surface is provided. The parts may be brought into contact with each other. Further, the front frame portion 40d of the base portion 4 is not a particularly essential member, but is provided to cover an appropriate area from the viewpoint of protecting the inside.

From the above state, by swinging the swinging member 5 in the direction of the upright state using the contact point X (see FIG. 14(b)) between the two as a fulcrum, the swinging member 5 swings about the contact point X. The shaft 42 can be guided in the direction along the third elongated hole 45. When the swing shaft 42 moves to the third elongated hole 45, as shown in FIG. A portion of the front frame portion 40d comes into contact with another contact point Y, thereby stabilizing the posture of the swinging member 5. At this time, since the biasing force by the biasing portion 6 is acting on the swinging member 5, the swinging direction of the swinging member 5 is in the direction to the upright state, and the rib member 56 due to the contact point Y Since the state of contact between the front frame portion 40d and the front frame portion 40d is maintained, and the swinging member 5 is pressed upward, the swinging shaft 52 is stabilized in the state moved to the third elongated hole 45. . Such a simple operation makes it possible to temporarily restrict the sliding movement of the swing shaft 42.

Note that the state in which the sliding movement of the swing shaft 42 is temporarily restricted can be easily released by an operation that causes the swing member 5 to approach the base plate 3. The above-mentioned restricted state is stable only due to the urging force of the urging section 6. Therefore, if the swing shaft 42 can be moved against this urging force, the swing shaft 42 will be in the first position. It becomes possible to move into the long hole 41 of. A simple operation for this purpose is to press the swinging member 5 toward the base plate 3. When pressing the operating part 52, since the swing shaft 42 cannot be moved toward the base plate 3, it is preferable to press only the vicinity of the boundary between the locking part 51 and the operating part 52.

<Third modification example>
Next, a third modification of the embodiment will be described. This modification implements the temporary posture restriction of the swinging member 5 according to the second modification described above using another configuration. FIG. 15 mainly shows the swinging member 5 in the third modification. Note that FIG. 15 illustrates an example in which the rib member 56 is omitted. The swinging member 5 includes a second elongated hole 54 and a stopper 59. To explain the details, as described above, the shaft support portion 53 of the swinging member 5 is provided with a second elongated hole 54, and the swinging shaft 42 is inserted through the second elongated hole 54. (See Figure 2). Since the swing shaft 42 is also inserted into the first long holes 41a and 41b provided in the side surfaces 40a and 40b of the base 4, the swing shaft 42 is inserted into the first long holes 41a and 41b. 41a and 41b, it is impossible to move the swing shaft 42 in an angular direction with respect to its longitudinal direction. However, since the second elongated hole 54 is elongated in an angular direction with respect to the longitudinal direction of the first elongated holes 41a, 41b, the swing shaft 42 is The swinging member 5 can be moved while being inserted into the shaft. By making the longitudinal direction of the second elongated hole 54 angular with respect to the longitudinal direction of the first elongated holes 41a, 41b, the movement direction regulated by the first elongated holes 41a, 41b. This makes it possible to move the swinging member 5 in a direction different from that shown in FIG.

To explain this second elongated hole 54 in more detail, within the range of the swinging posture in which the swinging member 5 changes from an upright state to a tilted state, in any swinging posture, its longitudinal The direction is provided in an angular direction with respect to the longitudinal direction of the first elongated holes 41a, 41b, and the base end thereof is the position where the swinging member 5 approaches the base plate 3 most. , the terminal end is provided at a position where the swinging member 5 is separated from the base plate 3 within an appropriate range.

Therefore, as shown in FIG. 15(a), the third modification has a configuration in which a stopper 59 protrudes inside the swinging member 5 (approximately at a position near the boundary between the operating section 53 and the locking section 51). That is. Note that this stopper 59 has other functions as well as the function of the rib member 56 described above. That is, in the configuration in which the rib member 56 functions as a stopper, the tip edge of the rib member 56 abuts the opposite edge of the front frame portion 40d of the base 4 and cannot be lowered, but this stopper In addition to the above, the reference numeral 59 also serves to limit the upward movement of the swinging member 5.

As shown in FIG. 15(b), this stopper 59 is formed across the side parts 40a and 40b at the tip edge of the front frame part (bottom part 40c) that forms the base part 4 into a shallow box shape. It is configured such that it enters the inside of the box-shaped base 4 from near the upper edge of the portion) 40d. In this state, like the rib member 56 described above, the linear descent of the swing member 5 can be restricted. The state in which the stopper 49 should restrict the downward movement of the swinging member 5 is a state in which the locked portion 7 is locked, and the swinging member 5 is raised and in an upright state. be. Therefore, in order to escape from this state, the swinging member 5 must be manually operated (using the operating section 52).

When the swinging member 5 is manually operated, the swinging member 5 can be swinged, and as described above, the swinging member 5 can be lowered (as described above, the swinging shaft 42 (sliding along the first elongated holes 41a, 41b), and further, the swinging member 5 can be separated from the base portion 3 along the second elongated hole 54. Therefore, the stopper 59 can be moved from near the upper edge of the front frame portion 40d of the base portion 4 to the outside of the base portion 4, and further moved to the lower surface of the bottom portion 40c of the base portion 4.

Therefore, as shown in FIG. 15(c), the stopper 59 can be brought into contact with a portion of the lower surface of the bottom portion 40c of the base portion 4 (near the boundary with the front frame portion 40d). In this state, the biasing section (biasing means) 6 applies an upward biasing force to the swinging member 5, and the movement of the swinging member 5 due to this biasing force ( 41a, 41, 54) can be restricted (stopped). Note that when the biasing force applied to the swinging member 5 by the biasing unit (biasing means) 6 acts in the direction of inducing the swinging member 5 into the tilted state, the stopper 59 moves in the direction in which it separates from the bottom surface portion 40c. However, here, it is assumed that the biasing force in the direction of swinging is applied in a direction that causes the swinging member 5 to be in an upright state (opposite to the direction in which it is in a tilted state), although it is slight. There is. As a result, the swinging member 5 can be maintained in a lowered state by the stopper 59. This state is a state in which the locked portion 7 is unlocked, and by maintaining this state, a situation in which the sliding door is intentionally not locked occurs for a limited time. be able to. In other words, a state similar to that shown in the second modification may occur.

Regarding the modified example of the above configuration, how to use it when a situation where the swinging door is not locked intentionally is explained. As shown in FIG. a)), by manually operating the swinging member 5 to swing the swinging member 5, the stopper 59 is removed from near the upper edge of the front frame 40d of the base 4 (outward of the base 4). 16(b)), and further move the swinging member 5 in the direction along the second elongated hole 54 (FIG. 16(b)). In this state, the stopper 59 does not come into contact with the base 4, and the swinging member 5 can be freely operated. When the stopper 59 is manually operated to a position where it can come into contact with a part of the lower surface of the bottom surface 40c of the base 4 (near the boundary with the front frame 40d), the operation is stopped and the stopper 59 is moved. It is sufficient if it is brought into contact with the bottom surface portion 40c.

In the process of changing the attitude of the swinging member 5 as described above, the biasing section (biasing means) 6 applies a biasing force to the biasing receiving section 55 via the transmission member 62. In this case, the bias receiving portion 55 may be applied to either the first diagonal region 55a or the second diagonal region 55b. This is because the swinging member 5 is in the middle of changing its posture, and the biasing force is eventually applied to the first oblique region 55a so that the swinging member 5 can be maintained in an upright state. It suffices if it is in a state where it can make contact.

Note that in order to release the swing door from the state in which the stopper 59 does not lock the swing door (the state in which the stopper 59 is in contact with the bottom surface 40c of the base 4), the swinging member must be manually operated. 5 may be set in a desired posture, but, for example, the swinging member 5 may be simply operated to be in a tilted state. That is, by tilting the swinging member 5, the stopper 59 can easily release the contact with the bottom surface 40c of the base 4, and by releasing the restriction by the stopper 59, the biasing portion (biasing means ) 6 causes the swinging member 5 to rise and be guided to the upright state. This makes it easy to release the situation in which the sliding door is not locked for a limited, short period of time, and also when some external force acts on the swinging member 5 (when the swinging member 5 comes into contact with something) Since the locking state can be immediately achieved even in the case of the locking door, safety can also be ensured when the vehicle is moved without locking the sliding door.

<Fourth modification example>
Next, a fourth modification of the embodiment will be described. In this modification, the transmission member 62 is modified. FIG. 17 shows a transmission member 62 in a fourth modification. Note that FIG. 17(a) is an enlarged view of only the transmission member 62, and FIG. 17(b) is a view showing the relationship with the swinging member 5. As shown in FIG. 17(a), the overall shape of the transmission member 62 is plate-like, and a rod 63 (see FIG. 1) of the biasing means 6 is inserted into the approximately center thereof. A through hole 65 is provided. The through hole 65 is a long hole in order to facilitate changes when the transmission member 62 comes into contact with either the first inclined region 55a or the second inclined region 55b.

This transmission member 62 is divided into two parts, one surface (upper surface) having a smooth first contact area 66 formed therein, and the other surface (upper surface) excluding the area where the through hole 65 is to be provided. (Specifically, on both sides of the through hole 65), contact areas 67a and 67b are formed which are inclined so that the plate thickness is gradually reduced. This second contact area is provided continuously with the first contact area 66 and is tapered toward the distal edge.

As shown in FIG. 17(b), the first inclined region 55a is provided so as to be inclined at an acute angle with respect to the orthogonal direction of the swinging member 5, and the second inclined region 55b is provided with respect to the longitudinal direction. It is provided so as to be inclined at an acute angle. The first contact area 66 is in contact with the first inclined area 55a of the swinging member 5, and the second contact area 67 (67a, 67b) is in contact with the second inclined area 55a of the swinging member 5. It is provided to be in contact with the region 55b. Further, the second contact area 67 is arranged to be located on the opposite side of the base plate 3. Therefore, when the second inclined region 55b moves in the direction away from the base plate 3 due to the swinging member 5 swinging to the inclined state, the second inclined region 55b contacts the second contact region 67. They will come into contact with each other.

To explain the operation mode of the transmission member 62 in the modification of the above configuration, as shown in FIG. 18, when the transmission member 62 contacts the first inclined region 55a, the first contact region 66 contacts (See FIG. 18(a)). In such a contact state, the urging force by the urging means acts upward, and the urging force is applied to the inclination of the first inclined region 55a (with respect to the direction perpendicular to the longitudinal direction of the swinging member 5). The inclination (inclination diagonally downward toward the base plate 3 at an acute angle) acts in the normal direction of its surface. This component force in the normal direction acts on the swinging member 5 to make it swing in the direction of standing up (around the axis of the swinging center), so it guides the attitude of the swinging member 5 into the upright state. becomes.

On the other hand, in order for the second inclined region 55b to come into contact with the transmission member 62, it is necessary to swing the swinging member 5 greatly so that the posture of the swinging member 5 is tilted. Then, when the boundary point between both inclined regions 55a and 55b moves to the second contact region 67 by swinging in this manner, the second contact region 67 comes into contact (FIG. 18(b) reference). In this state, the transmission member 62 does not tilt significantly, and can receive the urging force from the urging means on its lower surface and act upward. The upward biasing force at this time acts in the normal direction of the second contact area 67 according to its inclination. At this time, the component force in the normal direction is applied to the contact position with the second inclined region 55b (near the boundary point with the first inclined region 55a), so the swinging force is lower than the swinging center. It acts to push up the operating section side of the member 5. As a result, the component force in the normal direction acts on the swinging member 5 to swing it in the direction of tilting it (around the axis of the swinging center), so the posture of the swinging member 5 is changed to the tilted state. It will be guided.

Further, as shown in FIG. 19(a), when the swinging member 5 is manually operated to move the swinging center along the second elongated hole 54, the swinging member 5 moves toward the base plate 5. However, even in such a case, the second inclined region 55b can maintain a state in contact with the second contact region 67, and the swinging member 5 can be maintained in a tilted state.

Furthermore, as shown in FIG. 19(b), the swing center of the swing member 5 moves in the direction approaching the base plate 3 along the second elongated hole 54, and/or the posture changes somewhat to an upright state. Even if the first inclined region 55a and the second inclined region 55b Since the state of contact with the region 67 is maintained, the swinging member 5 continues to be guided in the direction of tilting its posture. Therefore, the manner in which the transmission member 62 is brought into contact with the second inclined region 55b is in the temporarily fixed state (see FIG. 9(b)) when the locking by the swinging member 5 is released. In the temporarily fixed state, even if the swinging center of the swinging member 5 moves due to an external force and/or swings in the upright direction, the disassociation prevention state can be maintained.

Note that, since this fourth modification is a modification of the transmission member 62, it is assumed that the configurations shown in the above-described embodiment and each modification are used as they are for other configurations.

<Other variations>
Although the typical embodiments and modified examples of the present invention are as described above, the present invention is not limited to the above embodiments and modified examples. In particular, the mechanism for temporary fixing does not have to be the mechanism shown in the above embodiments. For example, as shown in FIG. 20(a), the swinging member 5 is not provided with the second elongated hole 54, but is provided with a notch 30c that is a part of the upper plate 30b that constitutes the base plate 3, and The movable member 5 may be configured to expand the range of swing when the movable member 5 swings at an appropriate height (predetermined position in the vertical direction). That is, the action of the biasing force in the opposite direction, which is necessary for temporary fixing, is due to the selection of whether the transmission member 62 is in sliding contact with the first diagonal region 55a or the second diagonal region 55b. Therefore, it is sufficient if the transmission member 62 can be moved to a state where it can come into sliding contact with the second oblique region 55b by expanding the swingable range of the swinging member 5.

In the above modification, when the swing shaft 42 is located above the first elongated hole 41, the boundary point 50 between the locking area 51a and the sliding contact area 51c of the locking part 51 is located at the base plate 3. The swinging member 5 is swung until it comes into contact with the surface of the oscillating member 5, but the boundary point 50 can only enter the notch 30c when the swiveling shaft 42 is moved downward to a specific position. Become. This allows a configuration in which the second elongated hole 54 is not provided.

Note that the mechanism for performing this type of temporary fixing may not be provided depending on the case. A case where such a mechanism is not provided is, for example, a case where a locking device is placed only at two places on the left and right sides of a small swing door, and while supporting the center of the swing door, the locking device is placed on the right and left arms. This is a case where both locking devices can be operated by extending them alternately. This is because under such circumstances, since the state of the sliding door can be adjusted with one hand, no external force is applied to the locking device (swinging member 5) when releasing the lock.

As another modification, as shown in FIG. 20(b), there is one in which the tip end portion of the operating portion 52 of the swinging member 5 is curved so as to approach the base plate 3. By curving the tip of the operating section 52 in this way, when operating the operating section 52, specifically when performing a manual operation to release the lock, it is possible to insert a finger into the penetrating portion 52c of the operating section 52 for passing the finger through. When inserting and operating, it is natural to move the swinging member 5 downward and at the same time pull it toward you, and the swinging member 5 easily and quickly changes to the desired posture (see FIG. 9(b)). can be done. In particular, if the user feels that the two-step artificial operation is a roundabout way, one-time artificial operation is induced, which makes the operation simpler.

Furthermore, as another modification, as shown in FIGS. 21(a) and 21(b), the locking part 51 to be formed on the tip side of the swinging member 5 is formed of two plate-like members. be. The locking part 51 has a locking area 51a, a contact area 51b, and a sliding contact area 51c, but in the above embodiment, these are in contact with the locked piece 7. It was constructed with an appropriate area. Even when this is constructed from two plate-like members, a suitable area can be secured, and when it comes into contact with the locked piece 7, two places on both sides of the two plate-like members abut. Therefore, the function as the locking portion 51 can be fully exhibited.

Furthermore, in a configuration in which the second elongated hole 54 is not provided in the swinging member 5 (see FIG. 22(a)), the relative position of the swinging shaft 42 with the swinging member 5 may be displaced. There is no. Therefore, as shown in FIGS. 22(a) and 22(b), the swing shaft 42 may be configured integrally with the swing member 5. FIG. 22(a) shows a case where the locking area 51a and the like are made into a planar shape, and FIG. 22(b) shows a case where the locking portion 51 is formed of two plate-like members. These integrated rocking shafts 44 can be one rocking shaft 44 inserted inside, or can be composed of two rocking shafts 44a and 44b protruding from both surfaces. Good too.

In each of the above configurations, it is assumed that the locking portion 51 is divided into the locking area 51a, the contact area 51b, and the sliding contact area 51c, but for example, the contact area 51b and the sliding contact area 51c are continuous. It may be formed with a single curved surface. This is because both of them sequentially come into contact and sliding contact with the locked piece 7 when the latter is locked. That is, although it is supposed to be formed separately from its functional aspect, it may have a continuous curved surface shape as long as it can be continuously contacted and slid in a desired state.

1, 2 Loading platform 3 Base plate 4 Base 5 Swinging member 6 Biasing part (biasing means)
7 Locked pieces 11, 21 Loading platform surface 12a, 12b Side part of loading platform (swinging door)
12c Rear part of loading platform (swing door)
13, 14, 23, 24, 26 Hinge, etc. (axis support)
15a, 15b, 15c, 15d, 25a, 25b, 25c Support column (supporting column)
20a Rear door 20b, 20c Wing door 22a, 22b Lower wall of wing door (swing door)
25c Rear door frame, etc. (substitute for support)
30a Lower plate of the base plate 30b Upper plate of the base plate 30c Notches 31, 32 of the base plate Taper holes 33, 34 Pressing parts 35, 36 Through hole (adjustment hole)
37, 38 Bolts, etc. (fastening means)
39 Projections 40a, 40b Side surface portion 40c of the base Bottom surface portion 40d of the base Front frame portions 41a, 41b of the base First elongated hole 42 Swing shaft 43 Through holes 44, 44a, 44b Swing shaft 45 Third elongated hole 50 Boundary point 51 between the locking area and the sliding contact area Locking part 51a Locking area 51b Contact area 51c Slide contact area 52 Operating parts 52a, 52b Near both widthwise end edges on the back side of the operating part 52c Penetrating part 53 Shaft support Part 54 Second elongated hole 55 Force receiving part 55a First diagonal area 55b Second diagonal area 56 Rib members 57, 58 Bending part 59 Stopper 61 Compression coil spring 62 Transmission member 63 Rod 64 Insertion part 65 Through hole 66 First contact area 67 (67a, 67b) Second inclined area 70a Surface 70b of the locked piece Back side 70c of the locked piece Lower surface 71 of the locked piece Approximately U-shaped notches A, B Locking device TR1, TR2 Truck

Claims (15)

A locked piece provided on the free end side of the swing door that moves along a predetermined movement trajectory as the swing door rotates in order to lock the swing door that rotates on the pivot support at the free end side. A device for locking with a supporting pillar,
a base plate attached to the surface of the column; a base provided on the base plate; a swinging member of an appropriate length that is provided so as to be swingable within a range of , and a biasing means for applying a biasing force to the swinging member with the base as a reference;
The swinging member includes a locking portion that is formed on the distal end side of the swinging center and that can move in and out of the movement locus area of the locked piece according to a change in the attitude of the swinging member, and the swinging member. and an operating section that is formed on the rear end side of the center of motion and allows manual operation of the swinging member,
The biasing means biases the swinging member toward a movement locus region of the locked piece, and guides the swinging member to an upright state at least when locking the locked piece. A locking device for a swing door, which is characterized by: Further, the swing member is provided with a swing shaft for swingably supporting the swing member with respect to the base, the swing member is provided with a shaft support portion that supports the swing shaft, and the base is , a first elongated hole that supports the swinging shaft and allows the swinging shaft to slide; 2. The locking device for a sliding door according to claim 1, wherein the locking device is provided in an elongated manner in a substantially parallel direction. The shaft support portion includes a biasing receiving portion that receives a biasing force from the biasing means at a rear end side of the swinging shaft, and the biasing receiving portion is arranged in a direction perpendicular to the longitudinal direction of the swinging member. A first slanted area is formed to be inclined at an acute angle with respect to the first slanted area, and when the urging force of the urging means acts on the first slanted area, the first length of the swing shaft is 3. The swing door locking device according to claim 2, wherein, in addition to sliding along the hole, the swinging member is biased so that the swinging position of the swinging member changes from a tilted state to an upright state. The locking portion includes a locking area that can come into contact with the locked piece while facing the locked piece when the locked piece moves toward the base plate, and a locking area that can come into contact with the locked piece when the locked piece moves toward the base plate. and a contact area that allows contact by the locked piece, and the contact area moves the swing shaft when contacted by the locked piece, and 4. The swing door locking device according to claim 3, which guides the swinging member to swing. A sliding contact area that allows sliding contact by the locked piece is formed between the locking area and the contact area of the locking part of the swinging member, and the sliding contact area allows sliding contact by the locked piece. 5. The swing door locking device according to claim 4, wherein the locking device guides the moving direction of the locking portion by sliding contact. The bias receiving portion is inclined at an acute angle with respect to the longitudinal direction of the swinging member so as to be continuous with the tip of the first slanted region and inclined toward the tip side of the swinging member. A second slanted region is formed, and when the urging force of the urging means acts on the second slanted region, in addition to sliding along the first elongated hole of the swing shaft, The swinging member is biased to change the swinging posture of the swinging member from an upright state to a tilted state, and the first oblique region and the second oblique region are biased in accordance with the swinging posture of the swinging member. 6. The swing door locking device according to claim 5, wherein a biasing force is selectively applied to the slanted region. The swinging member is provided with a stopper that stops the action of the biasing force by the biasing means between the swinging member and the base, and the swinging shaft is inserted into the shaft support portion to stop the swinging force. A second elongate member that allows the shaft to slide and is elongated in an angular direction with respect to the longitudinal direction of the first elongated hole within the range of the swinging posture in which the swinging member changes from an upright state to a tilted state. A long hole is provided, and the center of rocking can be changed by sliding the rocking shaft,
Swinging is performed by moving the swinging member against the biasing force of the biasing means while sliding the swinging shaft along the second elongated hole by a manual operation using the operating unit. 7. The swing door locking device according to claim 6, wherein the stopper stops the swinging member from moving in the urging direction when changing the center of the swinging member. The shaft support part is inserted with the swing shaft to allow the swing shaft to slide, and is arranged in an angular direction with respect to the longitudinal direction of the first elongated hole in the tilted state of the swing member. A second elongated hole is provided in the oscillating member, and the center of oscillation can be changed by sliding the oscillating shaft. When the center of rocking is changed by sliding the rocking shaft along the second elongated hole while keeping the rocking shaft in an inclined state, the action of the biasing force by the biasing means is applied to the first oblique region. 7. The swing door locking device according to claim 6, wherein the swing door locking device can be changed from the first slanted region to the second slanted region. The base extends in an acute angle direction with respect to the first long hole and in a direction away from the base plate while being continuous with the rear end of the swinging member in the longitudinal direction of the first long hole. A third elongated hole is provided, and the swinging shaft is engaged with the tip of the third elongated hole by guiding the swinging shaft to the third elongated hole by an artificial operation using the operating section. 9. The swing door locking device according to claim 8, wherein the swing door locking device is capable of temporarily restricting the sliding movement of the swing shaft by the action of a biasing force by the biasing means while stopping the sliding door. The base portion includes a bottom portion on a side opposite to the side that locks the free end of the swing door, and the biasing means abuts the first oblique region formed in the biasing receiving portion. 6. The locking door according to claim 5, further comprising a plate-shaped transmission member that can be arranged so as to be movable, and a compression spring that applies a pressing force between the bottom surface of the base and the transmission part. Device. The bias receiving portion is inclined at an acute angle with respect to the longitudinal direction of the swinging member so as to be continuous with the tip of the first slanted region and bent toward the front end of the swinging member. A second oblique region is formed,
The transmission member is divided into a first contact area that contacts the first sloped area and a second contact area that contacts the second sloped area, and the second contact area is , a surface facing the second contact area is tapered so that the plate thickness gradually becomes thinner toward an edge located on the opposite side of the base plate while being continuous with the first contact area; 11. The swing door locking device according to claim 10, wherein the swing door locking device is formed. The swinging member is provided with a stopper that stops the action of the biasing force by the biasing means between the swinging member and the base, and the swinging shaft is inserted into the shaft support portion to stop the swinging force. A second elongate member that allows the shaft to slide and is elongated in an angular direction with respect to the longitudinal direction of the first elongated hole within the range of the swinging posture in which the swinging member changes from an upright state to a tilted state. A long hole is provided, and the center of rocking can be changed by sliding the rocking shaft,
Swinging is performed by moving the swinging member against the biasing force of the biasing means while sliding the swinging shaft along the second elongated hole by a manual operation using the operating unit. 12. The swing door locking device according to claim 11, wherein the stopper stops the swinging member from moving in the biasing direction when changing the center of the swinging member. The shaft support part is inserted with the swing shaft to allow the swing shaft to slide, and is arranged in an angular direction with respect to the longitudinal direction of the first elongated hole in the tilted state of the swing member. A second elongated hole is provided in the oscillating member, and the center of oscillation can be changed by sliding the oscillating shaft. When the center of rocking is changed by sliding the rocking shaft along the second elongated hole while keeping the rocking shaft in an inclined state, the action of the biasing force by the biasing means is applied to the first oblique region. 12. The swing door locking device according to claim 11, wherein the swing door locking device can be changed from the first slanted area to the second slanted area. The base extends in an acute angle direction with respect to the first long hole and in a direction away from the base plate while being continuous with the rear end of the swinging member in the longitudinal direction of the first long hole. A third elongated hole is provided, and the swinging shaft is engaged with the tip of the third elongated hole by guiding the swinging shaft to the third elongated hole by an artificial operation using the operating section. 14. The locking device for a sliding door according to claim 13, wherein the swinging door locking device can temporarily restrict sliding of the swing shaft by the action of a biasing force by the biasing means. The base plate includes a mounting part for mounting on the column,
The mounting portion includes a tapered hole penetrating the base plate body in a circular shape, a circular plate-shaped pressing portion having an outer peripheral surface that can come into contact with the inner peripheral surface of the tapered hole, and a circular plate forming the pressing portion. It is provided with an adjustment hole formed of a long hole extending through the plate-shaped radial direction with an appropriate length, and a fastening means inserted into the adjustment hole, and the insertion position in the adjustment hole by the fastening means and the adjustment hole are provided. By adjusting the direction of the adjustment hole, the fastening means is tightened while matching the fastening position previously provided on the columnar body, and the base plate is pressed through the pressing portion, thereby The locking device for a sliding door according to any one of claims 1 to 14, which is attached to a column.

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