JP7221660B2 - Door stopper for box type cargo bed - Google Patents

Description

The present invention provides a box-shaped loading platform mounted as a loading platform on a van body type truck or the like, or a double-door or rotating door provided on a box-shaped loading platform such as a transport container loaded on a large-sized truck. The present invention relates to a door stopper for a box-type cargo bed, which is used to hold the side surface of the box-type cargo bed close to and parallel to the side surface of the box-type cargo bed.

In general, a van body type truck is equipped with a box-shaped loading platform (aluminum container) as a loading platform, and a large trailer or the like is loaded with a transportation container. These box-type cargo beds and box-type cargo beds such as containers are usually provided with a double-opening (rotating) rear door at the rear of the cargo bed. It is fixed to the struts on both sides of the rear frame via multiple hinges. Lock rods are attached to the left and right rear doors to hold them in the closed position, and the upper and lower ends of the lock rods are cam keepers (receivers) fixed to the top and bottom of the frame when the rear doors are closed. fixed to Also, such pivoting doors are sometimes attached to the sides of box-type cargo beds.
When such trucks carry in and out of various facilities such as distribution centers, factories, and warehouses, the left and right rear doors of the box bed are opened before the truck can open the rear opening of the box bed to various facilities. The rear part of the box-shaped cargo bed is stopped in the vicinity of the platform, etc., and goods are loaded and unloaded between the box-shaped cargo bed and the platform.

By the way, when opening the rear door of the box type carrier, the lock rod is removed from the upper and lower cam keepers, the left and right rear doors are opened, and the left and right sides of the rear door are held by door stoppers. In this case, in order to prevent the rear door from obstructing the rear view mirror when the truck is backing up, and to prevent the rear door from interfering with the truck parked next to it, It is necessary to rotate the rear door by 270° so that it is parallel to the side of the box-type cargo bed and hold this position with a door stopper.
Door stoppers of this type are proposed in Patent Documents 1, 2 and 3.

Patent Document 1 relates to a double door holding device for a van-type vehicle or the like, and this double door holding device includes a T-shaped member attached to the bottom of the free end of the double door screwed to the rear side frame of a container. a main body fixed to the side lower frame of the container and having a T-shaped groove into which the T-shaped member can be inserted; and a fastener consisting of a detent piece formed in the .
In this way, by rotating the retaining piece to expose the T-shaped groove, the T-shaped member is engaged with the T-shaped groove, and the retaining piece is returned to its original position, the T-shaped member is prevented from vibrating. Even if it works, it will never come off.

Patent Document 2 relates to a locking device for a pivotal door of a box-type cargo bed, and this device is an improvement of the double door holding device of Patent Document 1. In this locking device, in order to latch the latch, the stopper fixed to the side panel of the loading platform is provided with a vertical linear groove and a detachment prevention member formed with four protrusions. When locking the open rear door, the horizontal bar at the tip of the T-shaped latch connected to the rear door by a chain is inserted into the interior of the fastener through the linear groove of the fastener, and the fastener is engaged. The tip of the T-shape is rotated inside, and the horizontal bar of the tip of the T-shape crosses over the projection and turns sideways.
By doing so, the latching operation can be easily performed with one hand, and even if the locked rear door vibrates, the latch is locked in the sideways position so that the rotating torque does not act on the latch. It prevents it from coming off.

Patent document 3 relates to a container and a vehicle with a container. In particular, the container has a structure in which the door is opened by rotating around a rotating shaft and is stored in the main body by sliding along the side surface of the main body. ing.
By adopting such a structure, the space behind the vehicle is secured when the door is opened, and loading and unloading of luggage is made efficient and easy.

Japanese Utility Model Laid-Open No. 63-34875 JP 2012-197662 A JP-A-09-183311

However, the above-described conventional door stopper for a box-type cargo bed has the following problems.
(1) In each of the devices disclosed in Patent Documents 1 and 2, when the rear door (rotary door) is in the open position, a latch connected to the rear door is fixed to the side surface of the box-type cargo bed. By inserting it into the groove of the rear door and locking it with the latching member, it is possible to keep the open state of the rear door. On the other hand, when the rear door is opened to the open position of 270°, the rear door is close to the side of the box-type cargo bed and becomes almost parallel. Since the space between the rear door and the side surface of the box-type cargo bed is very narrow, it is difficult to hook the latch to the latching member and to remove it from the latching member.
Also, with these devices, the latch hangs on the rear door while the rear door is closed, leaving the latch member exposed on the side of the box bed, which is visually unappealing.
(2) In the container of Patent Document 3, the rear door (rotating door) is opened by rotating around the rotating shaft, and is slid along the side surface of the main body to be stored in the main body side. Due to the structure, many parts are required around the pivot shaft of the rear door, which complicates the structure and increases the cost.

The present invention solves such conventional problems, and in this kind of door stopper for a box-type cargo bed, the door stopper can be opened by a simple operation (of the door stopper) in the open position of the pivotal door. ) Securely maintain the open state of the rotating door by engaging it with the rotating door, reduce the installation space (of the door stopper), and box-type cargo bed when not in use (of the door stopper) To improve the appearance of a box type cargo bed by storing it in a place where it is difficult to see, simplify the structure (as a door stopper), reduce the number of parts, and reduce the cost.

In order to achieve the above object, the present invention
A door stopper for a box-shaped loading platform that engages with the rotating door at an open position of the rotating door of the box-shaped loading platform to hold the open state of the rotating door,
a mounting base having a mounting portion on the top and a pair of support plates on both sides;
A pair of upper parts, one end of which is vertically rotatably mounted via an upper pin and a lower pin that are installed parallel to the upper and lower parts between the support plates of the mounting base and protrude outside the support plates. an arm and a pair of lower arms;
One end is mounted rotatably in the vertical direction via an intermediate pin that is laid in parallel between the upper and lower pins between the support plates of the mounting base, and the other end is a long U-shaped tip. a guide plate having a groove, the groove being engaged with a guide pin extending between the longitudinally intermediate portions of the pair of upper arms and protruding to the outside of each of the support plates; and a periphery of the guide plate. a positioning spring wound around and placed under compression between the intermediate pin and the guide pin;
The pair of upper arms and the pair of lower arms are connected via an upper pin and a lower pin that are vertically installed on the lower rear surface, and have a pressing portion that can be engaged with the rotating door on the upper rear surface. The other end is attached so as to be vertically rotatable, and can be stored in a storage position facing the front of the mounting base and in contact with the front lower side of the mounting base. a stopper plate arranged to be able to rise to a door lock position engageable with the rotating door;
with
The attachment portion of the mounting base is fixed to the box-type cargo bed so that it can be engaged with the rotary door at the opening position of the rotary door of the box-shaped cargo bed. is,
At the open position of the rotary door, the stopper plate is pulled out from the storage position and pushed up to the door lock position, and the pressing portion of the stopper plate is engaged with the rotary door from the outside. to hold the pivotal door open;
This is the gist of it.
This door stopper preferably employs the following configuration for each part.
(1) A lock device for locking the stopper plate at the retracted position is also provided, and the lock device includes a lock hole formed between the longitudinally intermediate portions of the pair of lower arms and one end of the stopper plate on the lower side rear surface of the stopper plate. are mounted so as to be rotatable in the vertical direction via an intermediate pin that is bridged in parallel between the upper and lower pins of the lower arms, and the other end is hook-shaped or claw-shaped so that it can be engaged with the lock holes of the pair of lower arms. a hook formed; a spring member that biases the hook to rotate in the direction of the lock hole so that the hook can be engaged with the lock hole of the pair of lower arms; and a stopper plate formed at one end of the hook. Lock release levers are rotatably arranged on both sides and are configured to rotate the hook in the direction of releasing it from the lock hole. is automatically engaged with the lock hole, and unlocking is performed by manual operation of the unlocking lever.
(2) A stopper plate rotation restricting portion for restricting rotation of the stopper plate at the door lock position is also provided, and the stopper plate rotation restricting portion includes a planar stopper surface provided on the back surface of the mounting plate; A stopper portion is formed at one end of the pair of upper arms so as to protrude and contact the stopper surface of the mounting plate at the door lock position of the stopper plate.
(3) A pin support portion formed on the lower back surface of the stopper plate and having a groove with a semicircular or U-shaped cross section at the tip end thereof so as to be able to support the upper, lower, and intermediate pins; A box-shaped mounting bracket is attached and fixed to the rear surface, and has a box-shaped mounting bracket having grooves with semicircular or U-shaped cross sections on both side surfaces that can be engaged with the upper, lower, and intermediate pins, and the upper, lower, and intermediate pins are pins. It is sandwiched and supported between the groove of the support portion and the groove of the mounting bracket.
(4) A cam keeper is provided on the upper and lower sides of the box-type cargo bed above and below the rotating door, and the cam keepers on the upper and lower parts of the rotating door are engaged with each other. A lock rod is provided to hold the closed state, and the pressing portion of the stopper plate is engaged with the lower end of the lock rod.
(5) The stopper plate protrudes from both sides of the stopper plate toward the mounting base, and when the user grips the stopper plate from the front side, the user's fingers are placed on the upper side back surface of the stopper plate. It has a safety cover that restricts entry and entry of a user's fingers into between a pair of upper arms and a pair of lower arms extending between the stopper plate and the mounting base.
(6) Instead of (1) above, a lock device for locking the stopper plate at the retracted position is also provided, and the lock device is formed between the longitudinal intermediate portions of the pair of lower arms. A lock hole having projections on both sides of the edge portion corresponding to the other end and a recess in the middle thereof, and one end of which is rotated by an intermediate pin that spans in parallel between the upper and lower pins on the back surface of the lower side of the stopper plate. It is mounted slidably in the axial direction of the intermediate pin while its movement is regulated, and the other end is engaged with the protrusions on both sides so as to be able to pass through the intermediate concave portion with respect to the lock holes of the pair of lower arms. A pair of hooks that can be formed in a hook shape or a claw shape, and a pair of hooks that are wound around the intermediate pin between the hooks. and a spring member formed on one end side of each of the hooks to press and bias the protrusions on both sides of the stopper plate so as to bring the hooks on the intermediate pin closer to each other. a pair of unlocking push buttons arranged to be pressable for shifting the respective hooks from the projections on both sides of the lock hole toward the middle recess, wherein the stopper plate is stored in the retracted position. In the closed state, the hooks are engaged with the protrusions on both sides of the lock hole to lock the stopper plate. By pushing, the hooks are shifted from the projections on both sides of the lock hole to the middle recess, unlocking the stopper plate, and returning the stopper plate to the storage position. By pressing an unlocking push button, the hooks may be shifted toward each other so as to be able to pass through the intermediate recesses of the lock holes and engage the lock holes.
In this case, the stopper plate is protruded from the outer surface of the other end of each hook of the locking device so as to be engageable with the upper edge of the pair of lower arms and with the side edge of the lock hole. When the lock release push button is not pressed and the lock release push button is not pushed to return to the storage position, the upper edge of each of the lower arms is engaged to stop the rotation of each of the lower arms. and between the upper rear surface of the stopper plate and the mounting base at least to the extent that the user's fingers are not caught, and the hooks are located on the protrusions on both sides of the lock hole It is preferable to have a pair of locking protrusions that engage with respective side edges of the lock hole to maintain engagement between the respective hooks and the lock hole when the hook is engaged and locked.
In this case, the pair of locking projections has a thick lower portion and a lower end serving as a locking portion, and an upper portion which is gradually thinned upward from the lower side to form a tapered surface. In addition, the stopper plate is pushed up to the door lock position, and the locking protrusions are perforated so that they can be engaged with each other. It is preferable to have a pair of engagement holes for positioning and holding each of the upper arms in position.
(7) In place of (3) above, a mounting bracket is detachably attached to the bottom side back surface of the stopper plate, and the mounting bracket consists of a grooved plate, and each of the upper, lower, and intermediate pins can be inserted on both sides. It has a pin insertion portion and a button insertion portion through which each unlocking push button of the locking device can be inserted. It may be passed through each button insertion portion and arranged on the lower side back surface of the stopper plate via the mounting bracket.
(8) Instead of (1) and (6) above, a lock device for locking the stopper plate at the retracted position is also provided, and the lock device is formed between the longitudinal intermediate portions of the pair of lower arms. A locking hole having a convex portion on both sides of the edge portion corresponding to the other end side of each lower arm and a concave portion in the middle thereof, and one end extending in parallel between the upper and lower pins on the back surface of the lower side of the stopper plate. It is mounted so as to be slidable in the axial direction of the intermediate pin while its rotation is restricted by the intermediate pin, and the other end of the pair of lower arms can pass through the intermediate concave portion with respect to the lock holes of the pair of lower arms and the protrusions on both sides. A pair of hooks formed in a hook shape or a claw shape so as to be able to be locked to the portion, and a pair of hooks wound around the intermediate pin between the hooks. a spring member that presses and urges the protruding portions on both sides of the lock hole so as to be engageable with each of the hooks on the intermediate pin formed on one end side of each of the hooks and on both sides of the stopper plate; a pair of unlocking push buttons arranged so as to be pressable in the approaching direction for shifting the hooks from the protrusions on both sides of the lock hole toward the recess in the middle; The stopper plate protrudes from the upper edge of the pair of lower arms on the outer surface so as to be engageable with the inner surface, and engages with the upper edge and the inner surface of each lower arm when returning the stopper plate to the storage position. a pair of guide projections for pressing the hooks in a mutually approaching direction to shift the hooks so as to be able to pass through the intermediate recesses of the lock holes; Each of the guide projections is moved to engage with the protrusions on both sides of the lock hole by shifting the hooks that have passed through the intermediate recess of the lock hole toward both ends of the intermediate pin by the biasing force of the spring member. and a hook auto-shift mechanism consisting of a pair of guide holes for escaping from the inner surface of each lower arm toward the outer surface thereof. are engaged with the protrusions on both sides of the lock hole to lock the stopper plate. When pulling out the stopper plate from the storage position, the lock release push buttons are pressed to release the hooks. By shifting from the protrusions on both sides of the lock hole to the recess in the middle, the stopper plate is unlocked and returned to the storage position. In this case, without pressing the lock release push button, the engagement between the guide projections of the hooks and the upper edge and the inner surface of the lower arm, which acts on the hook auto-shift mechanism, Each of the hooks is automatically shifted toward each other so as to be able to pass through the intermediate concave portion of the lock hole, and is engaged with the lock hole, thereby causing the hook auto-shift mechanism to operate. By engaging the guide projections with the guide holes of the lower arm, the hooks are automatically shifted from the middle concave portion of the lock hole to the convex portions on both sides to engage with the convex portions on both sides. It may be possible to
In this case, the other end of each upper arm is provided with a pair of engagement holes, and the outer surface of the other end of each hook is fitted to each side edge of the lock hole and each engagement hole of each upper arm. It has a pair of engaging projections, and when the stopper plate is returned to the retracted position and the hooks are engaged with the projections on both sides of the lock hole to be locked, the locking projections are engaged. engages with each side edge of the lock hole to hold the engagement between each hook and the lock hole, and when the stopper plate is pushed up to the door lock position, each of the locking projections are engaged with the engagement holes of the upper arms to position and hold the stopper plate at the door lock position.
(9) Instead of the above (3), (5) and (7), a mounting bracket is detachably mounted on the back surface of the lower side of the stopper plate, and the mounting bracket consists of a grooved plate, and both sides thereof are Pin insertion portions extending from both sides of the stopper plate toward the mounting base, into which upper and lower pins and intermediate pins can be inserted, and unlocking push buttons of the lock device can be inserted. The upper, lower, and intermediate pins are inserted into the pin insertion portions, and the unlocking push buttons are passed through the button insertion portions and through the mounting brackets. The mounting bracket is attached to the lower back surface of the stopper plate, and the two side portions of the mounting bracket protrude from both sides of the stopper plate toward the mounting base. A safety cover may be provided between the stopper plate and the mounting base to restrict entry of the user's fingers.

According to the door stopper for a box-type cargo bed of the present invention, the following special effects peculiar to the present invention are exhibited.
(1) This door stopper comprises a mounting base, a pair of upper arms, a pair of lower arms, a guide plate and positioning springs, and a stopper plate. It is fixed to the lower part of the box-shaped cargo bed so that it can be engaged with the rotating door at the open position of the door, and is attached to the box-shaped cargo bed. The pressing portion of the stopper plate is engaged with the rotating door from the outside to hold the rotating door in the open state. By simply operating the stopper, the door stopper can be engaged with the rotatable door and the open state of the rotatable door can be reliably maintained.
(2) The door stopper comprises a mounting base, a pair of upper arms, a pair of lower arms, a guide plate and positioning springs, and a stopper plate. It is fixed to the lower part of the box-shaped cargo bed so that it can be engaged with the rotating door at the open position of the door, and is attached to the box-shaped cargo bed. The stopper plate is pushed up to the position, and the holding portion of the stopper plate is engaged with the rotating door from the outside to hold the rotating door in an open state, so that the installation space for the door stopper can be reduced. .
(3) The door stopper comprises a mounting base, a pair of upper arms, a pair of lower arms, a guide plate and positioning springs, and a stopper plate. It is fixed to the lower part of the box-shaped cargo bed so that it can be engaged with the rotating door at the open position of the door, and is attached to the box-shaped cargo bed. When the door stopper is not in use, the box-type cargo bed is kept open by engaging the pressing portion of the stopper plate with the rotating door from the outside to keep the rotating door open. It can be stored in a place where it is difficult to see, and the appearance of the box type cargo bed can be maintained well.
(4) The door stopper comprises a mounting base, a pair of upper arms, a pair of lower arms, a guide plate and positioning springs, and a stopper plate. It is fixed to the lower part of the box-shaped cargo bed so that it can be engaged with the rotating door at the open position of the door, and is attached to the box-shaped cargo bed. The pressing part of the stopper plate is pushed up to the position and engaged with the rotating door from the outside to hold the rotating door in an open state. can be reduced to reduce costs.

Figures showing the external configuration of the door stopper for a box-type cargo bed according to the first embodiment of the present invention ((a) is a perspective view showing the state in which the stopper plate is stored in the storage position, (b) is a Perspective view showing the state pushed up to the position) Figures showing the internal structure of the door stopper ((a) is a perspective view showing a state in which the stopper plate is stored in the storage position, and (b) is a perspective view showing a state in which the stopper plate is pushed up to the door lock position). A diagram showing the structure of the door stopper, especially the mounting base (perspective view seen from the front side) A diagram showing the configuration of a pair of upper arms of the door stopper in particular (perspective view seen from the base end side) The figure which shows the structure of a pair of lower arm of the same door stopper especially (perspective view seen from the base end side). A diagram showing the structure of the door stopper, especially the guide plate (perspective view seen from the base end side) A diagram showing the structure of the door stopper, especially the stopper plate (rear view) A diagram (side view) showing the structure of the door stopper, especially the stopper plate. A diagram showing the configuration of the hook of the door stopper, especially the lock device (perspective view seen from the tip side) A diagram showing an example of use of the same door stopper ((a) is a side cross-sectional view showing the state in which the stopper plate is stored in the retracted position when the rotating door of the box-type cargo bed is closed. Cross-sectional side view showing a state in which the stopper plate is pushed up to the door lock position when the movable door is opened.) A second embodiment of the present invention is a diagram showing the external configuration of a door stopper for a box-type cargo bed ((a) is a perspective view showing a state in which the stopper plate is accommodated in the retracted position, and (b) is a Perspective view showing the state pushed up to the position) A diagram showing the configuration of the door stopper, especially the safety cover ((a) is a perspective view (b) is a front view) A third embodiment of the present invention is a diagram showing the external structure of a door stopper for a box-type cargo bed ((a) is a perspective view showing a state in which the stopper plate is stored in the storage position, and (b) is a Perspective view showing the state pushed up to the position) Fig. 3 shows the internal structure of the door stopper ((a) is a side cross-sectional view showing the state in which the stopper plate is stored in the storage position; (b) is a side cross-sectional view showing the state in which the stopper plate is pushed up to the door lock position; ) A diagram showing the configuration of a pair of upper arms of the door stopper in particular (perspective view seen from the base end side) The figure which shows the structure of a pair of lower arm of the same door stopper especially (perspective view seen from the base end side). A diagram showing the configuration of the door stopper, especially the stopper plate (side cross-sectional view) A diagram (perspective view) showing the configuration of the mounting bracket of the same door stopper. A diagram showing the configuration of the hook of the door stopper, especially the lock device (perspective view seen from the base end side) A diagram (enlarged side view) showing the configuration of the engagement hole formed in the upper arm of the door stopper and the locking projection provided on the hook. A diagram showing an example of use of the same door stopper ((a) is a side cross-sectional view showing the state in which the stopper plate is stored in the retracted position when the rotating door of the box-type cargo bed is closed. Cross-sectional side view showing a state in which the stopper plate is pushed up to the door lock position when the movable door is opened.) Fourth Embodiment Figures showing the external configuration of a door stopper for a box-type cargo bed according to the fourth embodiment of the present invention ((a) is a perspective view showing a state in which the stopper plate is stored in the storage position, (b) is a Perspective view showing the state pushed up to the position) Both (a) and (b) show the internal structure of the door stopper with the stopper plate stored in the storage position. (b) is a cross-sectional side view of the door stopper between a pair of hooks) Both (a) and (b) show the internal structure of the door stopper with the stopper plate pushed up to the door lock position. (b) is a cross-sectional side view of the door stopper between a pair of hooks) and a pair of upper arms of the same door stopper. (Perspective view seen from the base end side) A diagram showing the configuration of a pair of lower arms of the door stopper in particular (perspective view seen from the tip side) A diagram (perspective view) showing the structure of the door stopper, especially the holding portion. A diagram showing the configuration of the hook of the lock device of the door stopper, in particular (perspective view seen from below on the base end side). A diagram (perspective view) showing the structure of the mounting bracket of the door stopper in particular. A diagram showing an example of use of the door stopper ((1) is a side cross-sectional view showing the state in which the stopper plate is stored in the retracted position when the rotating door of the box-type cargo bed is closed. Cross-sectional side view showing a state in which the stopper plate is pushed up to the door lock position when the movable door is opened.)

Next, a mode for carrying out the present invention will be described with reference to the drawings.
1 and 2 show the overall construction of the door stopper for a box-shaped cargo bed according to the first embodiment, and FIGS. 3 to 9 show the construction of each part of the door stopper for the box-shaped cargo bed.
As shown in FIGS. 1 and 2, the door stopper S for the box-shaped cargo bed (hereinafter simply referred to as the door stopper S) is attached to the rotating door when the door of the box-shaped cargo bed is opened. In this door stopper S, in particular, a mounting base 1, a pair of upper arms 2 and a pair of lower arms 3, a guide plate 4 and a positioning arm are engaged. It comprises a spring 5 and a stopper plate 6 .
The door stopper S also includes a locking device 7 and a stopper plate rotation restricting portion 8 .

As shown in FIG. 3, the mounting base 1 has a mounting portion 13 on the top and a pair of support plates 12 on both sides.
In this case, the mounting base 1 is formed to have a U-shaped cross-section in plan view, and includes a rear portion 11 made of a vertically long rectangular flat plate, left and right side portions 12 made of a vertically long substantially rectangular flat plate, and left and right side portions 12 each made of a vertically long substantially rectangular flat plate. It has an extension part 13 extending horizontally outward from the upper edge of the housing in the form of a rectangular piece, and the front, upper and lower surfaces are open surfaces. The left and right side portions 12 form the support plate 12 described above, and the upper portion (in this case, slightly above the vertical middle portion) and the lower portion near the rear portion 11 are slightly closer to the middle portion in the depth direction of each support plate 12. An upper pin insertion portion 121 and a lower pin insertion portion 122 are formed respectively. An intermediate pin insertion portion 123 is provided between the lower pin insertion portions 122 . When a pair of upper arms 2, a pair of lower arms 3, and a guide plate 4, which will be described later, are attached to the mounting base 1, upper pins ( A header pin) 14, a lower pin (header pin) 15, and an intermediate pin (header pin) 16 are inserted. Further, the upper extension portions 13 of the left and right side portions 12 form the mounting portions 13 described above, and mounting screw insertion portions 130 are formed in the front and rear thereof, respectively. This mounting portion 13 is used when the door stopper S is mounted on the box-type cargo bed, and a mounting screw is inserted therethrough.

The pair of upper arms 2 and the pair of lower arms 3, as shown in FIG. , and protrudes outside (forward or downward) of each support plate 12 .
In this case, the pair of upper arms 2 includes, as shown in FIG. 4, the left and right knife-shaped arms 2 and an arm connection that connects the upper edges of the left and right arms 2 on one end side, in this case, on the base end side. 21. Each arm 2 has an upper pin insertion portion 202 at the tip in this case, an upper pin insertion portion 201 at the base end in this case, and a guide pin insertion portion 203 at the middle portion in the longitudinal direction. Further, an arc-shaped slit 22 centered on the upper pin insertion portion 201 is formed with a predetermined length around the proximal end of each arm 2 and slightly forward of the upper pin insertion portion 201 . Since the upper pin 14 and the intermediate pin 16 are installed close to each other, the slit 22 prevents the pair of upper arms 2 and the intermediate pin 16 from interfering with each other when the pair of upper arms 2 rotate. , to release the intermediate pin 16 . A portion of the stopper plate rotation restricting portion 8 is provided at the proximal edge portion of the arm connecting portion 21 . This point will be described later.
1 and 2, guide pins (header pins) 23 are inserted between the guide pin insertion portions 203, the tips of the pair of upper arms 2 are crimped, and attached. Each upper pin insertion portion 201 at the end is concentrically aligned with each upper pin insertion portion 121 of the mounting base 1, the upper pin (header pin) 14 is passed through each of these upper pin insertion portions 201, 121, and the tip end is It is caulked and attached to the attachment base 1 so as to be rotatable in the vertical direction.
As shown in FIG. 5, the pair of lower arms 3 includes left and right knife-shaped arms 3 and the other ends of the left and right arms 3. It consists of an arm connecting portion 31 that connects between the parts. A lower pin insertion portion 302 and a lower pin insertion portion 301 are formed at the distal end and the proximal end of each arm 3, respectively. A part of the lock device 7 is provided on the distal end side of the arm connecting portion 31 . This point will be described later.
1 and 2, each lower pin insertion portion 301 at the proximal end of the pair of lower arms 3 is concentrically aligned with each lower pin insertion portion 122 of the mounting base 1. A lower pin (header pin) 15 is passed through the lower pin inserting portions 301 and 122, and is attached to the attachment base 1 so as to be vertically rotatable by crimping the tip portion thereof.

As shown in FIG. 2, one end of the guide plate 4 extends vertically through an intermediate pin 16 that extends in parallel between the support plates 12 of the mounting base 1 and between the upper and lower pins 14 and 15. The other end has a long U-shaped groove 40 at its tip, and the groove 40 is engaged with a guide pin 23 installed between the longitudinal intermediate portions of the pair of upper arms 2 to It protrudes outside (forward or downward) of the support plate 12 .
In this case, as shown in FIG. 6, the guide plate 4 has one end, in this case, the base end, which is formed in a U shape in a plan view, and has a rectangular intermediate surface portion 41 extending in the left-right direction, and both end portions of the intermediate surface portion 41. A hole 420 is drilled in each of the left and right side portions 42 to form a bearing 4B, and the other end side, in this case, the distal end side, is the intermediate surface portion 41 of the base end. A U-shaped groove 40 extending forward from the center in a substantially rectangular shape and having a predetermined length extending rearward from the tip to the intermediate portion is formed to form the guide portion 4A.
As shown in FIG. 2, the positioning spring 5 is a coil spring, which is wound around the guide portion 4A of the guide plate 4. As shown in FIG.
1 and 2, each hole 420 of the bearing 4B at the proximal end of the guide plate 4 is concentrically aligned with each intermediate pin insertion portion 123 of the mounting base 1, and each hole 420, an intermediate pin (header pin) 16 is passed through each intermediate pin insertion portion 123, the tip is crimped and attached to the mounting base 1 so as to be rotatable in the vertical direction, and the tip has a pair of grooves 40. The positioning spring 5 is elastically compressed between the guide pin 23 and the bearing 4B.

As shown in FIG. 2, the stopper plate 6 has a pressing portion 61 on the upper rear surface 6U that can be engaged with the rotating door, and upper and lower pins 601 and 601 that extend vertically from the lower rear surface 6D. The other ends of the pair of upper arms 2 and the pair of lower arms 3 are attached via 602 so as to be rotatable in the vertical direction. It is arranged so as to be retractable to a door lock position in front of the front of the mounting base 1 and capable of being engaged with the upper rotating door.
In this case, as shown in FIGS. 7 and 8, the stopper plate 6 has a vertically elongated rectangular outer shape, the front side is designed, and the back side has a pair of shielding portions 63 on both left and right sides. , the upper rear surface 6U between the shielding portions 63 is the pressing portion 61 for the rotating door, and the lower rear surface 6D is the mounting portion for the mounting base 1. It has become 62. A pressing block 611 is fixed to the uppermost portion of the pressing portion 61 on the upper side. The mounting portion 62 on the lower side is formed on the lower side rear surface 6D, and has grooves 631, 632, 633, 634 with semicircular or U-shaped cross sections at the tips so as to be able to support the upper, lower, and intermediate pins 601, 602, 603. A pin support portion 63P consisting of 635, and grooves 641, 642 having a semicircular or U-shaped cross section, which are attached and fixed to the lower rear surface 6D and can be engaged with the upper, lower, intermediate pins 601, 602, 603 on both side surfaces. , 643, and each of the upper and lower pins 601, 602 has grooves 631, 632, 634, 635 in the pin support 63P and grooves 641, 642 in the mounting bracket 64. is sandwiched between and supported. Here, the pin support portion 63P includes grooves 631, 632, and 633 formed with a semicircular or U-shaped cross section near the upper portion, the middle portion, and the lower portion of the inner walls of the shielding portion 63 on the left and right sides of the lower rear surface 6D, Between the grooves 631 and 632 formed near the upper portion and the lower portion of the inner wall of the shielding portion 63 on both the left and right sides, bosses 634B and 635B are protruded at the same height as the grooves 631 and 632, and the tips of the bosses 634B and 635B are semicircular in cross section. It consists of grooves 634 and 635 formed to have a U-shaped cross section. In addition, on the lower rear surface 6D, inside the shielding portions 63 on both the left and right sides, grooves 631 and 632 formed near the upper portion and near the lower portion of the inner wall of each shielding portion 63 are provided near the upper portion and the lower portion, respectively. , and internally threaded portions 651 and 652 for fixing the mounting bracket 64 are formed together. The mounting bracket 64 (see FIG. 2) is formed in a box shape on the lower rear surface 6D so as to be fittable between the left and right shielding portions 63, and grooves 631 on the inner walls of the left and right shielding portions 63 are formed on the left and right side surfaces. , 632, 633 are formed with grooves 641, 642, 643 having a semicircular or U-shaped cross section, and female screw portions 651, 651, 651, 651, 651, 651, 651, 651, Mounting pieces 661 and 662 having screw insertion holes corresponding to 652 project laterally (right and left).
In this stopper plate 6 , the upper pin 601 and the lower pin 602 are arranged on the left and right side surfaces of the mounting bracket 64 above and below the middle portion in the depth direction, respectively. Since it is arranged slightly forward of the middle part in the depth direction of the surface part, the heights of the grooves 631, 632, 633, 634, 635 of the pin support part 63P and the grooves 641, 642, 643 of the mounting bracket 64 are adjusted accordingly. length is determined.
In this way, the upper pins 601 are passed through the upper pin insertion portions 202 at the other ends of the pair of upper arms 2, in this case, and the upper pins 601 are positioned near the upper portion of the lower rear surface 6D of the stopper plate 6. The lower pins 602 are passed through the lower pin insertion portions 302 at the other end, in this case, the tip of the pair of lower arms 3, and the lower pins 602 serve as stoppers. After being fitted into the grooves 632 forming the pin support portion 63P near the bottom of the lower rear surface 6D of the plate 6 and having the locking device 7 (to be described later) installed, the mounting bracket 64 is mounted in the grooves 641 and 642 on both sides thereof. Mounting screws are attached to the lower back surface 6D through pins 601 and lower pins 602, and are passed through mounting pieces 661 and 662 at the upper and lower ends of the side surfaces. is fastened and fixed. As a result, the upper and lower pins 601, 602 are sandwiched and supported between the grooves 631, 632 of the pin support portion 63P and the grooves 641, 642 of the mounting bracket 64, and the pair of upper arms 2 and the pair of lower arms are supported. An arm 3 is attached to a stopper plate 6 so as to be vertically rotatable.

As shown in FIG. 2, the lock device 7 locks the stopper plate 6 in the retracted position. One end of the stopper plate 6 is vertically rotatable via an intermediate pin 603 that spans between the upper and lower pins 601 and 602 of the lower rear surface 6D of the stopper plate 6, and the other end is attached to the pair of lower arms 3. A hook 71 formed in a hook shape or a claw shape so as to be able to engage with the lock hole 70, and a spring member that urges the hook 71 to rotate toward the lock hole 70 so as to be able to engage with the lock hole 70 of the pair of lower arms 3. 72 and a lock release lever 73 (see FIG. 1) formed at one end of the hook 71 and rotatably disposed on both sides of the stopper plate 6 for rotating the hook 71 in the direction of releasing it from the lock hole 70. ), an auto-lock mechanism is formed in which the hook 71 is automatically engaged with the lock hole 70 by pushing the stopper plate 6 back from the door lock position to the retracted position, and unlocking is performed by manual operation of the unlock lever 73. done.
In this case, as shown in FIG. 5, the lock hole 70 is formed in a rectangular shape at the other end of the arm connecting portion 31 of the pair of lower arms 3, in this case, at the distal end side of the arm connecting portion 31. As shown in FIG. As shown in FIG. 9, the hook 71 is composed of a pair of hook levers 711. Each hook lever 711 has a hook-shaped or claw-shaped locking portion 712 at one end, in this case the tip, and the other end, in this case , and a widened supporting portion 714 having a pin insertion portion 713 at its proximal end. Here, each hook lever 711 has an outer shape from the tip to the engaging portion 712 formed in an inclined surface or an arcuate cross-section. are in contact with the top ends of the arm connecting portions 31 of the pair of lower arms 3 and serve as guide surfaces for guiding the locking portions 712 toward the guide holes 70 . The connecting portion 715 is formed to have an L-shaped cross section and serves as a spring receiver for a spring member 72, which will be described later. A torsion spring 72 is employed as the spring member 72 (see FIG. 2). The lock release lever 73 is formed in a block shape extending in a direction intersecting with each hook lever 711 via a support shaft 716 protruding outwardly at a right angle from the upper portion of the outer surface of each support portion 714 . Although each shielding portion 63 of the stopper plate 6 is wide at the bottom side, each shielding portion 63 of the stopper plate 6 is passed through each support shaft 716 of the hook 71. A concave portion 630 is formed on the upper side of the wide portion of each shielding portion 63 (the vertical middle portion of each shielding portion 63 as a whole) so as to be arranged adjacent to the outside of the portion 63 (see FIG. 8).
2, an intermediate pin 603 is inserted between each pin insertion portion 713 of each support portion 714 of each hook lever 711 via a torsion spring 72, and this intermediate pin 603 is As described above, the upper pin 601 and the lower pin 602 are fitted into the grooves 633 forming the middle pin support portion 63P of the lower rear surface 6D of the stopper plate 6, and the support shafts 716 of the hooks 71 are inserted into the stopper plate. Each lock release lever 73 of the hook 71 is passed through the concave portion 630 of each shielding portion 63 of 6, and is arranged adjacent to the outside of each shielding portion 63. , and the other end is engaged with the spring bearing between each hook lever 711, and from this state, the mounting bracket 64 is engaged with each of the grooves 633 forming the intermediate pin support portion 63P on both side surfaces thereof. Mounting screws are attached to the lower rear surface 6D through the intermediate pin 603 in the groove 643 and passed through the upper and lower mounting pieces 661 and 662, and are fastened to the upper and lower female screw portions 651 and 652 of the lower rear surface 6D. fixed. As a result, the upper, lower, and intermediate pins 601, 602, 603 are sandwiched and supported between the grooves 631, 632, 633 of the pin support portion 63P and the grooves 641, 642, 643 of the mounting bracket 64. A pair of hook levers 711 are attached to the stopper plate 6 together with the arm 2 and the pair of lower arms 3 so as to be vertically rotatable. is urged to rotate toward.
By pushing back the stopper plate 6 from the door lock position to the retracted position in this manner, an auto-lock mechanism is formed in which the hook 71 is automatically engaged with the lock hole 70, and unlocking is performed by manual operation of each unlocking lever 73. In this case, each unlocking lever 73 is rotated upward.

As shown in FIG. 2, the stopper plate rotation restricting portion 8 restricts rotation of the stopper plate 6 at the door lock position. It consists of a planar stopper surface 81 provided and a stopper portion 82 projecting from one end of the pair of upper arms 2 so as to come into contact with the stopper surface 81 of the mounting plate 1 at the door lock position of the stopper plate 6 .
In this case, as shown in FIG. 3 , the back surface portion 11 of the mounting plate 1 is formed in a flat plate shape, and the inner surface of this back surface portion 11 is used as the stopper surface 81 . As shown in FIG. 4, the stopper portion 82 is formed in a rectangular shape extending from one end of the pair of upper arms 2, in this case, to the center of the rear edge portion of the arm connecting portion 21 provided at the proximal end. It is bent obliquely downward to a predetermined angle.

The door stopper S has such a configuration, and referring to FIG. 1, the mounting portion 13 of the mounting base 1 is attached to the box-type cargo bed so that it can be engaged with the pivotal door at the open position of the pivotal door of the box-like cargo bed. The stopper plate 6 is pulled out from the storage position and pushed up to the door lock position, and the holding portion 61 of the stopper plate 6 is rotated at the opening position of the rotating door. It engages the door from the outside to hold the pivoting door open.
In this case, the pressing portion 61 of the stopper plate 6 may be directly engaged with the lower end portion of the rotary door to hold the rotary door in the open state. It has cam keepers on the top and bottom of the box-type cargo bed above and below the door of the door, and has a lock rod that engages with the cam keepers on the top and bottom of the rotating door to hold the closed state of the rotating door. In this case, it is preferable to engage the pressing portion 61 of the stopper plate 6 with the lower end of the lock rod.

FIG. 10 illustrates a case where the door stopper S is applied to a van-body type truck box-shaped loading platform (aluminum container).
The door stopper S is arranged so that the upper mounting portion 13 of the mounting base 1 can be engaged with the lower end of each lock rod R of the rotating door at the open position of the rotating door of the box-shaped cargo bed C. It is fixed to the lower part of the box type loading platform C.
While the door stopper S is not used, as shown in FIG. 10(a), the stopper plate 6 is housed in the storage position facing the front of the mounting base 1 and in contact with the lower front side of the mounting base 1. This state is as follows. It is held by the guide plate 4 and the positioning spring 5 and further locked by the locking device 7 . That is, when the stopper plate 6 is stored in the retracted position, the pair of upper arms 2 and the pair of lower arms 3 are pivotally displaced downward. The engaged guide plate 4 is also pivotally displaced downward, and the positioning spring 5 wound around the guide plate 4 is urged downward to position the pair of upper arms 2 downward. . By positioning the pair of upper arms 2, the stopper plate 6 is held at the retracted position. Further, in this state, the hooks 71 of the lock device 7, in this case, the pair of hook levers 71, are biased by the torsion springs 72 toward the lock holes 70 provided in the pair of lower arms 3. A locking portion 712 at the tip of 711 is locked to the edge of the lock hole 70, and the stopper plate 6 is locked at the retracted position.

When opening the rotating doors of the box-type cargo bed C, the lock rods R are removed from the upper and lower cam keepers (not shown), the left and right doors are opened, and each door is rotated 270° to open the box. It is brought parallel and close to the side of the mold carrier C. At the open position of the rotary door, as shown in FIG. 10(b), the stopper plate 6 is pulled out from the retracted position to reach the door lock position. The lower end of R is engaged from the outside with the door when it is open.
In this case, when the stopper plate 6 in the retracted position is grasped with one hand and the lock release levers 73 (see FIG. 1) on both sides are pulled forward, the respective hook levers 711 are directed upward around the intermediate pin 603, That is, the locking portion 712 at the tip rotates in a direction away from the edge of the lock hole 70, and the lock is released. When the stopper plate 6 is continuously pulled forward, the pair of upper arms 2 and the pair of lower arms 3 rotate upward about the upper pin 14 and the lower pin 15 at the proximal ends, respectively. , the guide plate 4 engaged with the guide pins 23 of the pair of upper arms 2 is also rotated upward. At this time, the guide pin 23 moves toward the proximal end of the guide plate 4 in the U-shaped groove 40 at the distal end of the guide plate 4 , thereby compressing the positioning coil spring 5 around the guide plate 4 . Subsequently, when the stopper plate 6 is pulled forward and the guide plate 4 is rotated forward to a substantially horizontal position, the guide pin 23 moves further toward the base end of the guide plate 4 within the U-shaped groove 40. As a result, the positioning spring 5 is compressed to the maximum. Then, when the stopper plate 6 is rotated slightly upward at this position, the guide pin 23 moves toward the tip of the guide plate 4 in the U-shaped groove 40 at the tip of the guide plate 4, and the positioning spring 5 is moved. is expanded, the positioning spring 5 urges the upper arms 2 together with the guide plate 4 to rotate upward, and the upper arms 2 are rotated upward together with the guide plate 4 . By the rotation of these upper arms 2, the stopper plate 6 is automatically rotated upward to approach the door lock position, in this case, to a position where the lower ends of the lock rods R can be engaged. At this engagement position, each upper arm 2 is positioned by the upward rotational bias of the positioning spring 5, and the stopper plate 6 is held by these upper arms 2. As shown in FIG. Further, here, the stopper plate rotation restricting portion 8 works, and the stopper portion 82 at the base end of the pair of upper arms 2 is pressed against the planar stopper surface 81 provided on the back surface portion 11 of the mounting plate 1, and the stopper portion 82 is pressed. The rotation of the plate 6 is restricted and positioned, and the stopper plate 6 is held at the door lock position. As a result, even if an external force is applied to the rotating door to rotate it in the closing direction, the lower end of each lock rod R of the rotating door is engaged and held by the upper pressing portion 61 of the stopper plate 6. A pivoting door is held open.

As described above, the door stopper S has the following effects due to the structure described above.
(1) With this door stopper S, the stopper plate 6 is pushed up to the door lock position by pulling out the stopper plate 6 from the storage position under the box-type cargo bed at the open position of the rotating door. Since the pressing portion 61 is engaged with the rotating door from the outside to hold the rotating door in an open state, the opening position of the rotating door can be opened by a simple operation of the door stopper S. By engaging the door stopper S with the rotary door, the open state of the rotary door can be reliably held.
(2) The door stopper S is fixed to the lower part of the box-type cargo bed so that the mounting portion 13 of the mounting base 1 can be engaged with the rotating door at the open position of the door of the box-type cargo bed. Since it is attached to the type carrier, the installation space for the door stopper S can be reduced, and the space on both sides of the lower part of the box type carrier can be effectively used for other purposes without becoming an obstacle on both sides. can do.
(3) The door stopper S is fixed to the lower part of the box-type cargo bed so that the mounting portion 13 of the mounting base 1 can be engaged with the rotating door at the open position of the door of the box-type cargo bed. When the door stopper S is not used, it can be stored in a hard-to-see location of the box-type cargo bed so that the appearance of the box-type cargo bed can be well maintained.
(4) Since the door stopper S is composed of the mounting base 1, the pair of upper arms 2 and the pair of lower arms 3, the guide plate 4 and the positioning springs 5, and the stopper plate 6, the structure of the door stopper S can be simplified. , the number of parts can be reduced, and the cost can be reduced.

In this embodiment, the box-type cargo bed has cam keepers on the top and bottom of the rotating door, and the cam keepers on the top and bottom of the rotating door are engaged with each other. In the case of having a lock rod for holding the closed state of the rotating door, the pressing portion of the stopper plate is engaged with the lower end of the locking rod. It is also possible to engage with the lower end of the door to hold the rotatable door in the open state.

Next, the safety structure of the door stopper for the box-type cargo bed will be described.
The door stopper S is normally used by the user (the person using the door stopper S) gripping the stopper plate 6 from the front side and putting the thumb and middle finger or forefinger on the lock release lever 73. as long as the fingers of the hand are in front of the lock release lever 73, for example between the pair of upper arms 2 and the pair of lower arms 3 extending between the stopper plate 6 and the mounting base 1, or the stopper It does not go around the upper rear surface of the plate 6 (that is, between the upper rear surface 6U of the stopper plate 6 and the mounting base 1). However, in the unlikely event that the user returns the stopper plate 6 to the retracted position, in an unusual manner, he or she may place his/her fingers between the stopper plate 6 and the mounting base 1. If you put your fingers between the upper arm 2 and the pair of lower arms 3 or between the upper rear surface 6U of the stopper plate 6 and the mounting base 1, your fingers will be placed between the upper arm 2 and the lower arm 3 or between the lower arms 3. There is a risk of being caught between the stopper plate 6 and the mounting base 1 . This safety structure intends to ensure the safety of the user even in such cases.

FIG. 11 shows the overall structure of a door stopper for a box-type cargo bed according to the second embodiment having the safety structure, and FIG.
As shown in FIG. 11, in this door stopper S2 for a box-type cargo bed (hereinafter simply referred to as door stopper S2), the stopper plate 6 protrudes from both sides of the stopper plate 6 toward the mounting base 1, allowing the user to When gripping the stopper plate 6 from the front side, the finger may enter between the pair of upper arms 2 and the pair of lower arms 3 extending between the stopper plate 6 and the mounting base 1, or the upper part of the stopper plate 6 It has a safety cover 9 that regulates the entry of fingers into the side rear surface 6U.
Since this door stopper S2 is different from the first embodiment in that it has a safety cover 9, only this safety cover 9 will be described below.

As shown in FIG. 12, the safety cover 9 includes a pair of upper left and right covers 91 protruding from the left and right sides of the upper rear surface 6U of the stopper plate 6, and a pair of upper left and right covers 91 protruding from the left and right sides of the lower rear surface 6D of the stopper plate 6. an upper connecting portion 93 and a lower connecting portion 95 connecting the covers 91 and 92; and an attachment portion 94 for attaching the safety cover 9 to the stopper plate 6.
In this case, the entire upper left and right covers 91 can be arranged along the outer surfaces of the left and right support plates 12 of the mounting base 1 on both sides of the lower portion of the pressing portion 61 on the upper rear surface 6U of the stopper plate 6. When the stopper plate 6 is at the retracted position, it extends to the lower pin insertion portion 122 of each support plate 12 of the mounting base 1. When the stopper plate 6 is at the door lock position, a pair of It is formed in a substantially rectangular shape extending to near the middle between the pin insertion portion 202 and the guide pin insertion portion 203 of the upper arm 2, and has a horizontally extending convex portion 911 on the lower portion of the inner surface. In this case, in order to avoid interference between the tip and the lower pin insertion portion 122 of each support plate 12, the upper half of the tip of each cover 91 on the upper side is cut off.
The pair of lower left and right covers 92 as a whole correspond between the left and right support plates 12 of the mounting base 1 and the pair of upper arms 2 and the pair of lower arms 3 on both sides of the lower rear surface 6D of the stopper plate 6. to the bottom of each support plate 12 of the mounting base 1 when the stopper plate 6 is at the retracted position, and the pair of upper arms 2 when the stopper plate 6 is at the door lock position. It is formed in a vertically elongated substantially D shape extending to the vicinity of the guide pin insertion portion 203, and has a connecting portion 921 extending horizontally rearward opposite to the substantially D-shaped leading edge portion at the upper portion. The pair of lower left and right covers 92 are connected to the lower inner surfaces of the upper left and right covers 91 by connecting parts 921 via convex parts 911, and are connected downward slightly inside the upper left and right covers 91. be done.
The upper connecting portion 93 is formed in a horizontally long plate shape between the rear ends of the convex portions 911 on the inner surfaces of the upper left and right covers 91 and between the rear ends of the connecting portions 921 of the lower left and right covers 92 . , and screw insertion portions are provided as mounting portions 94 at both ends of the lower portion thereof.
The lower connecting portion 95 is formed to have a substantially L-shaped cross section between the lower portions of the left and right covers 92 on the lower side. have.
11, the safety cover 9 has the upper connecting portion 93 disposed below the upper rear surface 6U of the stopper plate 6, and the lower connecting portion 95 (flat portion 951 and raised portion 952). The mounting portion 94 is arranged along the other end (the other end and the other end edge of the lower surface) of the lower arm 3 of the lower arm 3, and the mounting portion 94 is provided at the lower portion of the upper rear surface 6U of the stopper plate 6. The upper left and right covers 91 protrude from the lower left and right sides of the pressing portion 61 from the upper rear surface 6U of the stopper plate 6, and the lower left and right covers 92 are attached to the stopper plate 6. It protrudes from both left and right sides of the lower rear surface 6D.

Thus, by providing the safety cover 9 to the door stopper S2, for example, when the user returns the stopper plate 6 from the door lock position to the retracted position, even if the user tries to grasp the upper side of the stopper plate 6, The safety cover 9, in this case, a pair of upper left and right covers 91, prevents the user's fingers from entering between the upper rear surface 6U of the stopper plate 6 and the mounting base 1, thereby preventing the stopper plate 6 and the mounting base 1 from Accidents such as fingers of the user being caught between the mounting base 1 and the stopper plate 6 can be prevented in advance. Even if it extends between the pair of upper arms 2 and the pair of lower arms 3 extending between the upper arm 2 and the lower arm 3, the safety cover 9, in this case, the pair of lower left and right covers 92, prevents the user's fingers from reaching the upper arm 2 and the lower arm 3. It is possible to prevent an accident such as a user's finger being caught between the upper arm 2 and the lower arm 3 without entering between the upper arm 2 and the lower arm 3.

13 and 14 show the overall construction of a door stopper for a box-type cargo bed according to a third embodiment provided with another safety structure, and FIGS. showing configuration.
As shown in FIGS. 13 and 14, the door stopper S3 for the box-type cargo bed (hereinafter simply referred to as the door stopper S3) is, like the first embodiment, a pivotal door stopper for the box-type cargo bed. At the open position, it engages with the rotary door to hold the open state of the rotary door. , a positioning spring 5, and a stopper plate 6N.
The door stopper S3 also includes a locking device 7N and a stopper plate rotation restricting portion 8N, as in the first embodiment.

As shown in FIGS. 13 and 14, the mounting base 1 is substantially the same as that of the first embodiment. Here, each part of the mounting base 1 is given the same reference numerals as in the first embodiment, and duplicate description thereof is omitted.

As shown in FIGS. 15 and 16, the pair of upper arms 2N and the pair of lower arms 3N are slightly different in shape from those in the first embodiment, but overall they are the same as in the first embodiment. It has a configuration generally common to that of . Here, in each upper arm 2N and each lower arm 3N, substantially the same portions as those in the first embodiment are assigned the same reference numerals as in the first embodiment, and redundant description thereof is omitted. Parts different from the embodiment will be given new reference numerals and explanations will be added.

As shown in FIG. 15, the pair of upper arms 2N has locking projections 767 (see FIG. 14) provided on hooks 71N of a locking device 7N to be described later with the stopper plate 6N pushed up to the door lock position. ) has a pair of engagement holes 24 that can be engaged with each other, and the stopper plate 6N is pushed up to the door lock position by engagement between the locking protrusions 767 and the engagement holes 24. The arm 2N is positioned (temporarily) held. In this case, the intermediate lower edge portion between the upper pin insertion portion 202 and the guide pin insertion portion 203 of each upper arm 2N bulges downward in a substantially arcuate shape, and the upper pin insertion portion 202 and the guide pin insertion portion 202 bulge downward. A circular engaging hole 24 having a predetermined diameter is bored in an intermediate portion between the portion 203 and the portion 203 . Further, in the case of the upper arm 2N, a part of the stopper plate rotation restricting portion 8N is formed to protrude in a substantially triangular shape from the base end edge of each upper arm 2N instead of the base end edge of the arm connecting portion 21. be done.
In this manner, the pair of upper arms 2N are attached to the attachment base 1 so as to be vertically rotatable, as shown in FIGS. 13 and 14, similarly to the first embodiment.

As shown in FIG. 16, the pair of lower arms 3N has a locking hole 74 as part of the locking device 7N between the longitudinally intermediate portions of the pair of lower arms 3N, in this case, at the intermediate portion of the arm connecting portion 31. As shown in FIG. is provided. This lock hole 74 is formed in a substantially rectangular shape as a whole, and has projections 741 on both sides of the edge corresponding to the other end of each lower arm 3N, and a recess 740 between them. In this case, each convex portion 741 is formed in a vertically long small rectangular shape, and the recessed portion 740 is cut out in a horizontally long rectangular shape between the convex portions 741 .
In this manner, the pair of lower arms 3N are mounted on the mounting base 1 so as to be vertically rotatable, as shown in FIGS. 13 and 14, similarly to the first embodiment.

As shown in FIGS. 13 and 14, the guide plate 4 and the positioning springs 5 are substantially the same as those of the first embodiment. Here, each part of the guide plate 4 and the positioning spring 5 is assigned the same reference numerals as in the first embodiment, and duplicate description thereof is omitted.

As shown in FIG. 17, the stopper plate 6N has generally the same structure as that of the first embodiment as a whole, except for the structure on the back side. Here, portions of the stopper plate 6N that are substantially the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and redundant description thereof is omitted. are given new symbols and explanations are added.
As shown in FIG. 17, in this stopper plate 6N, unlike the first embodiment, mounting bosses 67 having two screw holes are provided in the upper portion and the lower portion of the lower rear surface 6DN. A mounting bracket 68 shown in FIG. 18 is detachably mounted thereon with mounting screws s (see FIG. 14). As shown in FIG. 18, the mounting bracket 68 is formed of a grooved plate, and has pin insertion portions 681, 682, 683 formed of circular holes through which upper, lower, and intermediate pins 601, 602, 603 can be inserted on both sides. and a button insertion portion 684 consisting of a rectangular groove into which each unlocking push button 766 of the locking device 7N, which will be described later, can be inserted. 682, 683, each unlocking push button 766 is passed through each button insertion part 684, and via this mounting bracket 68, the stopper plate 6N is mounted on the lower rear surface 6DN (see FIG. 14). be.
13 and 14, a pair of upper arms 2N and a pair of lower arms 3N (the other ends thereof) are attached to the stopper plate 6N by upper pins 601 as in the first embodiment. , and is vertically rotatable via a lower pin 602. Unlike the first embodiment, hooks 71N of a locking device 7N, which will be described later, are placed on the intermediate pin 603 to restrict rotation. and slidably mounted.

As shown in FIGS. 13 and 14, in this door stopper S3, instead of the locking device 7 of the first embodiment, the locking device 7 of the first embodiment for locking the stopper plate 6N at the retracted position is used. has a different locking device 7N.
The locking device 7N is formed between the longitudinal intermediate portions of the pair of lower arms 3N, and has projections 741 (see FIG. 16) on both sides of the edge portion corresponding to the other end side of each lower arm 3N, and Rotation is regulated by a lock hole 74 having a recess 740 (see FIG. 16) and an intermediate pin 603 whose one end is bridged in parallel between the upper and lower pins 601 and 602 of the lower rear surface 6DN of the stopper plate 6N. It is attached slidably in the axial direction of the intermediate pin 603, and the other end has a hook shape or hook shape so as to be able to pass through the intermediate concave portion 740 with respect to the lock hole 74 of the pair of lower arms 3N and to be locked to the convex portions 741 on both sides. A pair of claw-shaped hooks 71N are wound around the intermediate pin 603 between the hooks 71N. A coil spring 75, which is a spring member that presses and urges the portion 741 so as to be engageable, is formed on one end side of each hook 71N to bring the hooks 71N on the intermediate pin 603 closer to each other on both sides of the stopper plate 6N. and a pair of unlocking push buttons 766 for shifting each hook 71N from the projections 741 on both sides of the lock hole 74 toward the recess 740 in the middle.
In this case, the lock hole 74 is as described above (see paragraph 0033), and each of the pair of hooks 71N has a substantially L-shape as shown in FIG. , and a hook body 763 having a hook-shaped or claw-shaped locking portion 761 at the other end, in this case, a tip, and a support portion 764 projecting from the middle portion of the outer surface of the hook body 763 to have a square prism shape in cross section. , and an unlocking push button 766 consisting of a substantially rectangular button portion 765 extending upward in a substantially perpendicular direction at the projecting end of the support portion 764 . Each hook 71N has an intermediate pin 603 passed through the pin insertion portion 762, and is attached to a mounting bracket 68 via the intermediate pin 603. The mounting bracket 68 is attached to the lower rear surface 6DN of the stopper plate 6N, The intermediate pin 603 is arranged on the lower rear surface 6DN of the stopper plate 6N so as to be slidable from both ends to the center or vice versa. Each support portion 764 of the pair of hooks 71N is formed in a rectangular prism shape in cross section, and each support portion 764 includes a button insertion portion 684 (see FIG. 18) formed by a rectangular groove of the mounting bracket 68 on the back surface of the stopper plate 6N and the stopper. Rotation of each hook 71N is restricted by passing it through each rectangular recess 630 (see FIG. 17) on both sides of the plate 6N.
As shown in FIG. 14(a), the lock device 7N is such that when the stopper plate 6N is retracted to the retracted position, the engaging portions 761 of the hooks 71N engage the projections on both sides of the lock hole 74. 741 to lock the stopper plate 6N, and when pulling out the stopper plate 6N from the retracted position, each locking portion 761 of each hook 71N is pushed into the lock hole 74 by pressing each unlocking push button 766. When the stopper plate 6N is shifted from the projections 741 on both sides to the middle recess 740 to unlock the stopper plate 6N and returns the stopper plate 6N from the door lock position to the retracted position, each lock release push button 766 is pushed. Each hook 71N is shifted in a direction to approach each other so as to be able to pass through a recess 740 in the middle of the lock hole 74 so as to be engageable with the lock hole 740 .
In addition, as shown in FIG. 19, the locking device 7N has a pair of locking projections 767 on the outer surface of the other end of each hook 71N that can be engaged with the upper edges of the pair of lower arms 3N. When the stopper plate 6N is returned to the retracted position without pressing the lock release push button 766, the locking projections 767 are projected onto the respective lower arms 3N so as to be engageable with the side edges of the lock hole 74. Engage with the edge to stop the rotation of each lower arm 3N, between each lower arm 3N and the pair of upper arms 2N, and between the upper rear surface 6UN of the stopper plate 6N and the mounting base 1 A certain distance is maintained at least to the extent that the fingers of the user are not pinched, and when each hook 71N is engaged with the projections 741 on both sides of the lock hole 74 and locked, each side of the lock hole 74 He is trying to hold the engagement between each hook 71N and the lock hole 74 by engaging with the edge. The pair of locking protrusions 767 may be formed integrally with each hook 71N, or may be separately provided on each hook 71N so as to be attachable and detachable by screwing or the like. Since the locking projection 767 is detachably attached to each hook 71N, when the locking projection 767 wears due to repeated use of the door stopper S3 for a long period of time, it is possible to easily replace the part. Also, in this case, as shown in FIG. 19, the pair of locking protrusions 767 are formed in a circular shape slightly smaller than the diameter of each engagement hole 24 so as to be engageable with each engagement hole 24 of each upper arm 2N. , the bottom side is formed thick and the bottom end serves as a locking portion 768, and the top side is gradually thinned upward from the bottom side to form a tapered surface 769, and the stopper plate 6N is pushed up to the door lock position. Then, the locking projections 767 and the engaging holes 24 are engaged with each other so that the stopper plate 6N positions and holds the upper arms 2N pushed up to the door lock position. As shown in FIG. 20, the inner diameter of each engaging hole 24 of each upper arm 2N is slightly larger than the outer diameter of each locking projection 767, so that the stopper plate 6N at the door locking position is locked. It is an adjustment margin for the door for the box-type loading platform.

As shown in FIG. 14, the stopper plate rotation restricting portion 8N restricts rotation of the stopper plate 6N at the door lock position. A stopper portion 83 is formed at one end of the pair of upper arms 2N so as to protrude and contact the stopper surface 81 of the mounting plate 1 at the door lock position of the stopper plate 6N. Unlike the embodiment, the base end of each upper arm 2N is formed to protrude in a substantially triangular shape.

The door stopper S3 has such a structure, and like the first embodiment, the mounting portion 13 of the mounting base 1 can be engaged with the rotating door of the box-shaped carrier at the opening position of the rotating door. The stopper plate 6N is attached to the box-shaped cargo bed by being fixed to the lower part of the box-shaped cargo bed. At the opening position of the rotating door, the stopper plate 6N is pulled out from the retracted position and pushed up to the door lock position, and the holding portion 61 of the stopper plate 6N is released. It engages the pivoting door (in this case, the lower end of the locking rod) from the outside to hold the pivoting door open.

FIG. 21 illustrates a case where the door stopper S3 is applied to a van-body type truck box-shaped loading platform (aluminum container).
As shown in FIG. 21(a), the door stopper S3 holds the upper mounting portion 13 of the mounting base 1 at the opening position of the rotating door of the box-type cargo bed C and lock rods R of the rotating door. It is fixed to the lower part of the box-type loading platform C so as to be engageable with the lower end, and attached to the box-shaped loading platform C.
While the door stopper S3 is not used, as shown in FIG. 21(a), the stopper plate 6N is housed in the retracted position facing the front of the mounting base 1 and in contact with the lower front side of the mounting base 1. This state is It is held by the guide plate 4 and the positioning spring 5, and further locked by the locking device 7N. That is, when the stopper plate 6N is retracted to the retracted position, the pair of upper arms 2N and the pair of lower arms 3N are pivotally displaced downward to engage with the guide pins 23 of the pair of upper arms 2N. The guide plate 4 is pivotally displaced downward, and the positioning spring 5 wound around the guide plate 4 is urged downward to position the pair of upper arms 2N downward. The stopper plate 6N is held at the retracted position by positioning the upper arm 2N. The hooks 71N of the lock device 7N are pressed toward both ends of the intermediate pin 603 by the coil springs 75 and engaged with the protrusions 741 on both sides of the lock hole 74, locking the stopper plate 6N at the retracted position. be.

When opening the rotating doors of the box-type cargo bed C, the lock rods R are removed from the upper and lower cam keepers (not shown), the left and right doors are opened, and each door is rotated 270° to open the box. It is brought parallel and close to the side of the mold carrier C. 21(a) and 21(b), the stopper plate 6N is pulled out from the retracted position and pushed up to the door lock position, in this case, the lower end of each lock rod R. , the lower end of each lock rod R is engaged with the door when it is opened from the outside.
In this case, as shown in FIGS. 21(a) and 21(b), when the stopper plate 6N at the retracted position is grasped with one hand and the lock release push buttons 766 (button portions 765 thereof) on both sides are pressed, each hook is unlocked. 71N are slid toward the center on the intermediate pin 603, and the locking portion 761 of each hook 71N is shifted into the recess 740 of the lock hole 74 to release the lock. When the stopper plate 6N is pulled forward as it is, the locking portions 761 of the hooks 71N pass through the recesses 740 of the lock holes 74, and the pair of upper arms 2N and the pair of lower arms 3N are connected to the base end upper pins 14 and 3N, respectively. The lower pin 15 rotates upward, and along with this, the guide plate 4 engaged with the guide pin 23 of the pair of upper arms 2N also rotates upward. At this time, the guide pin 23 moves toward the proximal end of the guide plate 4 in the U-shaped groove 40 at the distal end of the guide plate 4 , thereby compressing the positioning coil spring 5 around the guide plate 4 . Subsequently, when the stopper plate 6N is pulled forward and the guide plate 4 is rotated forward to a substantially horizontal position, the guide pin 23 moves further toward the base end of the guide plate 4 within the U-shaped groove 40. As a result, the positioning spring 5 is compressed to the maximum. Then, when the stopper plate 6N is rotated slightly upward at this position, the guide pin 23 moves toward the tip of the guide plate 4 in the U-shaped groove 40 at the tip of the guide plate 4, and the positioning spring 5 is moved. is expanded, the positioning spring 5 urges each upper arm 2N to rotate upward together with the guide plate 4, and each upper arm 2N rotates upward together with the guide plate 4. As shown in FIG. The rotation of the pair of upper arms 2N automatically rotates the stopper plate 6N upward. The surface 769 contacts the inner surface of each upper arm 2N, and by the guidance of this tapered surface 769, each locking projection 767 of each hook 71N is engaged with each engagement hole 24 of each upper arm 2N, and the door is locked. In this case, the pressing portion 61 presses up to the position where the lower end of each lock rod R can be engaged. The door lock position of the stopper plate 6N can be adjusted by adjusting the adjustment margin between each engagement hole 24 of each upper arm 2N and each locking projection 767 of each hook 71N. At this door lock position, each upper arm 2N is urged upwardly by the positioning spring 5 and the engagement between each locking projection 767 of each hook 71N and each engagement hole 24 of each upper arm 2N. Positioning is held, and the stopper plate 6N is held by these upper arms 2N. In this case, furthermore, the stopper plate rotation restricting portion 8N works, and the stopper portion 83 at the proximal end of the pair of upper arms 2N presses against the planar stopper surface 81 provided on the rear surface portion 11 of the mounting plate 1, thereby moving the stopper plate. 6N is positioned with its rotation restricted, and the stopper plate 6N is held at the door lock position. As a result, even if an external force is applied to the rotating door to rotate it in the closing direction, the lower end of each lock rod R of the rotating door is engaged and held by the upper pressing portion 61 of the stopper plate 6N. A pivoting door is held open.

Further, when closing the rotating door of the box-type cargo bed C, the stopper plate 6N is returned to the retracted position. In this case, as shown in FIGS. 21(a) and 21(b), the stopper plate 6N at the door lock position is grasped with one hand, and the lock release push buttons 766 (the button portion 765 thereof) on both sides are pressed with the thumb and middle finger or When pushed with the index finger, each hook 71N is slid over the intermediate pin 603 toward the center, and each locking projection 767 of each hook 71N is disengaged from each engagement hole 24 of each upper arm 2N, and each hook 71N is engaged. The stop portion 761 is shifted so that it can be engaged with the lock hole 74 (that is, each hook 71N can pass through the recess 740 of the lock hole 74). When the stopper plate 6N is pushed back toward the storage position, the pair of upper arms 2N and the pair of lower arms 3N are rotated downward about the upper pin 14 and the lower pin 15 at the proximal ends, respectively. The guide plate 4 engaged with the guide pin 23 of the upper arm 2 is rotated downward, and the stopper plate 6N is rotated downward. When the stopper plate 6N approaches the bottom of the mounting base 1, the hooks 71N, the upper arms 2N, and the lower arms 3N approach each other, and the engaging portions 761 of the hooks 71N engage the lock holes of the lower arms 3N. At the same time as passing through the recess 740 of 74, the stopper plate 6N is returned to the retracted position. In this state, the positioning spring 5 wound around the guide plate 4 is urged downward to position the pair of upper arms 2N downward. It is held in the stowed position. Then, when the finger is released from the lock release push button 766, each hook 71N of the lock device 7N is pressed and biased toward both ends of the intermediate pin 603 by the coil spring 75, and is engaged with the protrusions 741 on both sides of the lock hole 74. As a result, the stopper plate 6N is locked at the retracted position. Further, this locked state is maintained by the engagement between each locking projection 767 of each hook 71N and each side edge of the lock hole 74. As shown in FIG.
When trying to store the stopper plate 6N, if the user releases the stopper plate 6N before the stopper plate 6N is returned to the retracted position, or if the unlocking push button 766 is pressed by the user's finger. is released, if the positioning spring 5 of the guide plate 4 is biased upward at that position, the stopper plate 6N is rotated upward, and the position of the positioning spring 5 is released at the door lock position. It is held by the upward rotational bias and the engagement between each locking projection 767 of each hook 71N and each engagement hole 24 of each upper arm 2N, and there is no particular problem in terms of safety. Conversely, when the positioning spring 5 of the guide plate 4 is biased downward at that position, the stopper plate 6N is rotated downward. Since the hooks 71N of the locking device 7N are not pushed, the coil springs 75 press and urge the hooks 71N toward the opposite ends of the intermediate pin 603, and the locking projections 767 of the hooks 71N engage the upper edges of the lower arms 3N. , each lower arm 3N stops rotating together with each upper arm 2N. Constant spacing is maintained. As described above, this interval is such that at least a finger can be inserted into the upper arm 2N and the lower arm 2N. Even if it is inserted between the upper arm 3N or between the upper back surface 6UN of the stopper plate 6N and the mounting base 1, it may be inserted between each upper arm 2N and each lower arm 3N and between the stopper plate 6N. Fingers are not caught between the upper rear surface 6UN and the mounting base 1. - 特許庁
The stopper plate 6N is stored in this manner, and after the stopper plate 6N is stored, the rotating door of the box-type cargo bed C is closed, and the upper and lower ends of the lock rod R are fixed by the upper and lower cam keepers. .

Even in this way, the same effects as those of the first embodiment can be obtained.

In addition, the door stopper S3 is unlocked by pressing the pair of unlock push buttons 766, especially the safety function of the lock device 7N. When pulling out the door or when pushing it back from the door lock position to the storage position, it is necessary to put a finger on each lock release push button 766, which prevents the user from erroneously operating the door stopper S3. can be inserted between a pair of upper arms 2N and a pair of lower arms 3N extending between the stopper plate 6N and the mounting base 1, or between the upper rear surface 6UN of the stopper plate 6N and the mounting base 1. do not have.

Further, in the door stopper S3, the safety structure of the locking device 7N, that is, when the stopper plate 6N is returned to the retracted position without pressing the unlocking push buttons 766, the locking projections 767 of the hooks 71N are disengaged. It engages with the upper edge of the lower arm 3N to stop the rotation of each lower arm 3N together with each upper arm 2N, between each upper arm 2N and each lower arm 3N, and on the upper side back surface of the stopper plate 6N. Since a certain distance is maintained between the 6UN and the mounting base 1 at least to the extent that the fingers of the user are not caught, it is possible that the user may, by any chance, use the device in a way that is different from the normal usage and damage the hand. Even if a finger is put between a pair of upper arms 2N and a pair of lower arms 3N extending between the stopper plate 6N and the mounting base 1 or is turned to the upper side back surface 6UN of the stopper plate 6N, the finger of the hand will not move. are not caught between the upper arm 2N and the lower arm 3N or between the stopper plate 6N and the mounting base 1.例文帳に追加Moreover, when each hook 71N is engaged with and locked by the projections 741 on both sides of the lock hole 74, the locking projection 767 engages with each side edge of the lock hole 74, and each hook 71N is locked. and lock hole 74, the stopper plate 6N in the retracted position can be locked more reliably. Further, this locking projection 767 has a locking portion 768 at its lower end and a tapered surface 769 at its upper side. A pair of engagement holes 24 with which the 767 can be engaged is provided, and the engagement of the engagement projections 767 and the engagement holes 24 allows the stopper plate 6N to move the upper arms 2N in a state of being pushed up to the door lock position. Since the stopper plate 6N is positioned and held, the stopper plate 6N can be reliably held at the predetermined door lock position.

Further, in this door stopper S3, upper and lower pins 601, 602, and 603 are attached to the lower back surface 6DN of the stopper plate 6N via mounting brackets 68, and each unlocking push button of the lock device 7N is mounted. 766 are arranged, the structure of the door stopper S3 can be simplified, the number of parts can be reduced, and the cost can be reduced.

22, 23 and 24 show the overall construction of a door stopper for a box-type cargo bed according to a fourth embodiment provided with yet another safety structure, and FIGS. The configuration of each part is shown.
As shown in FIG. 22, the door stopper S4 for the box-type cargo bed (hereinafter simply referred to as the door stopper S4) is, as in the third embodiment, at the open position of the pivotal door of the box-type cargo bed. , engages with the rotating door to hold the open state of the rotating door, and is a partial modification of the third embodiment, comprising a mounting base 1, It comprises a pair of upper arms 2N and a pair of lower arms 3n, a guide plate 4 and positioning springs 5 (see FIGS. 23 and 24), and a stopper plate 6N.
The door stopper S4 includes a lock device 7n and a stopper plate rotation regulating portion 8N, and further includes a hook auto-shift mechanism 77, as in the third embodiment.
Each part will be described in detail below. In addition, in this embodiment, there are cases where redundant descriptions of the elements in common with the third embodiment are omitted.

As shown in FIGS. 23 and 24, the mounting base 1 is substantially the same as that of the third embodiment. Here, each part of the mounting base 1 is assigned the same reference numerals as in the third embodiment, and duplicate description thereof is omitted.

As shown in FIGS. 23 and 24, the pair of upper arms 2N has substantially the same configuration as that of the first embodiment, and the pair of lower arms 3n slightly differs from that of the third embodiment. have different configurations. Here, in each upper arm 2N and each lower arm 3n, substantially the same parts as in the third embodiment are assigned the same reference numerals as in the third embodiment, and all or part of the redundant description is omitted. However, parts different from the third embodiment will be given new reference numerals and explanations will be added.

As shown in FIGS. 23 and 24, each hook 71n of a lock device 7n, which will be described later, is provided with a stopper plate 6N on the other end side of the pair of upper arms 2N in a state where the stopper plate 6N is pushed up to the door lock position. The locking projection 767n has a pair of engaging holes 24 that can be engaged with each other, and the engagement between the locking projections 767n and the engaging holes 24 pushes the stopper plate 6N up to the door lock position. Each upper arm 2N is positioned (temporarily) held. In this case, the intermediate lower edge portion between the upper pin insertion portion 202 and the guide pin insertion portion 203 of each upper arm 2N bulges downward in a substantially arcuate shape, and the upper pin insertion portion 202 and the guide pin insertion portion 202 bulge downward. A circular engagement hole 24 having a predetermined diameter is bored in the intermediate portion between the portion 203 and the portion 203 . Further, in the case of the upper arm 2N, a portion of the stopper plate rotation restricting portion 8N protrudes in a substantially triangular shape from the base edge portion of each upper arm 2N.
As shown in FIGS. 23 and 24, the pair of upper arms 2N are thus mounted on the mounting base 1 so as to be vertically rotatable, as in the third embodiment.

As shown in FIG. 25, the pair of lower arms 3n has a locking hole 74 as part of the locking device 7n between the longitudinal intermediate portions of each lower arm 3n, in this case, in the intermediate portion of the arm connecting portion 31. It is divided into two parts. Each of these lock holes 74 is formed in a substantially rectangular shape as a whole, and convex portions are formed on the outside of the edge portion corresponding to the other end side of each lower arm 3n (both sides when the two lock holes 74 are viewed as a whole). 741 , a recess 740 is provided on the inner side thereof (middle when the two lock holes 74 are viewed as a whole). In this case, each convex portion 741 is formed in a vertically elongated small rectangular shape, and each concave portion 740 is formed in a horizontally elongated rectangular shape by cutting.
In this case, the upper edge of each lower arm 3n on the other end side (slightly closer to the other end of the lower arm 3n than the edge of the other end of the lock hole 74) protrudes slightly in a mountain shape. A pair of guide holes 32 are drilled through both side surfaces of each lower arm 3n. In this case, each guide hole 32 is formed in a substantially arcuate shape below the upper edge of each lower arm 3n (so that a guide projection 717 of each hook 7n, which will be described later, can be fitted and removed). In each lower arm 3n, an oblique cut is made from the approximate center of the upper edge in the thickness direction to a predetermined position above the guide hole 32 on the upper side of the inner side surface so that the upper edge is the widest. The upper portion of the narrow inner side surface is formed in a tapered shape that gradually increases in width from top to bottom, and the inner side of the upper edge portion is a tapered surface 33 .
As shown in FIGS. 23 and 24, the pair of lower arms 3n are thus mounted on the mounting base 1 so as to be vertically rotatable, as in the third embodiment.

As shown in FIGS. 23 and 24, the guide plate 4 and positioning springs 5 are substantially the same as those of the third embodiment. Here, each part of the guide plate 4 and the positioning springs 5 is given the same reference numerals as in the third embodiment, and duplicate description thereof is omitted.

As shown in FIGS. 23 and 24, the stopper plate 6N is generally similar to that of the third embodiment. Here, each portion of the stopper plate 6N is given the same reference numerals as in the third embodiment, and redundant description thereof is omitted.
Here, a pressing portion 61 that is provided on the upper rear surface 6UN of the stopper plate 6N and can be engaged with the rotating door will be described.
As shown in FIGS. 23 and 24, the upper side of the stopper plate 6N is formed to be narrow, and the upper rear surface 6UN is formed with a laterally long substantially rectangular mounting recess 636, and screws are provided on both sides of the bottom of the mounting recess 636. A hole (not shown) is provided. As shown in FIG. 26, the pressing portion 61 is made of a synthetic resin material, in this case, a rubber material, and is horizontally elongated so as to be able to fit into the mounting recess 636 of the upper rear surface 6UN and protrude from the upper rear surface 6UN by a predetermined height. is formed into a rectangular block of A concave portion 612 having an arcuate cross-section is formed in the center of the lateral direction of the front surface of the pressing portion 61 so that a part of the peripheral surface of the lock rod of the box-shaped carrier can be fitted, and flat portions 613 are formed on both sides of the concave portion 612 . A screw insertion portion 614 is formed in each flat portion 613 .
In this way, the holding portion 61 is fitted into the mounting recess 636 of the upper rear surface 6UN of the stopper plate 6N, and the mounting screws (not shown) are passed through the respective screw insertion portions 614 of the holding portion 61. It is fastened and fixed to a screw hole (not shown).

As shown in FIGS. 23 and 24, this door stopper S4 also has a locking device 7n that is slightly different from the locking device 7 of the third embodiment for locking the stopper plate 6N at the retracted position.
The locking device 7n is formed between the longitudinal intermediate portions of the pair of lower arms 3n, with protrusions 741 (see FIG. 25) on both sides of the edge corresponding to the other end of each lower arm 3n, and an intermediate portion between them. Rotation is regulated by a lock hole 74 having a recess 740 (see FIG. 25) and an intermediate pin 603 whose one end is bridged in parallel between the upper and lower pins 601 and 602 of the lower rear surface 6DN of the stopper plate 6N. It is attached slidably in the axial direction of the intermediate pin 603, and the other end is hook-shaped or hook-shaped so that it can pass through the recess 740 inside the lock hole 74 of the pair of lower arms 3n and can be locked to the protrusion 741 outside. A pair of claw-shaped hooks 71n are wound around the intermediate pin 603 between the hooks 71n. A coil spring 75, which is a spring member that presses and urges the portion 741 so as to be engageable, is formed on one end side of each hook 71n to bring the hooks 71n on the intermediate pin 603 closer to each other on both sides of the stopper plate 6N. a pair of unlocking push buttons 766 (see FIG. 22) for shifting each hook 71n from the projection 741 on the outside of the lock hole 74 toward the recess 740 on the inside, and each hook 71n. Projected from the upper edge of the pair of lower arms 3n on the outer surface of one end side so as to be engageable with the inner surface, when the stopper plate 6N is returned to the storage position, the upper edge and the inner surface of each lower arm 3n. A pair of guide projections 717 that press the hooks 71n in a direction approaching each other by the engagement of and shift the hooks 71n so as to be able to pass through the recess 740 inside the lock hole 74, and the other end of each lower arm 3n. Each hook 71n formed on the outer side of the lock hole 74 and passing through the recess 740 inside the lock hole 74 can be shifted toward both ends of the intermediate pin 603 by the biasing force of the coil spring 75 and engaged with the protrusion 741 outside the lock hole 74. and a hook auto-shift mechanism 77 comprising a pair of guide holes 32 for allowing each guide projection 717 to escape from the inner side surface of each lower arm 3n toward the outer side surface.
In this case, the lock hole 74 is as described above, and each of the pair of hooks 71n is substantially L-shaped as shown in FIG. A hook main body 763 having a hook-shaped or claw-shaped engaging portion 761 at the end, in this case, a tip, a support portion 764 projecting from the middle portion of the outer surface of the hook main body 763 and having a rectangular prism shape in cross section, and this support portion. 764 is provided with a lock release push button 766 consisting of a substantially square button portion 765 extending upward in a substantially right angle direction, and the other end side of the hook 71n, in this case, the lock hole 74 is provided on the outer surface of the tip side. A pair of locking protrusions 767n are provided on one end side of the hook 71n, in this case, on the outer surface of the base end side in addition to the lower arm 3n. A pair of guide protrusions 717 are provided together so as to be engageable with the guide holes 32 on the end side. Here, each support portion 764 of each hook 71n is formed in a rectangular prism shape in cross section, and each support portion 764 is a button insertion portion 684 (see FIG. 22) consisting of a rectangular groove in the mounting bracket 68n on the back surface of the stopper plate 6N and the stopper plate. Rotation of each hook 71N is restricted by passing it through each rectangular recess 630 (see FIG. 22) on both sides of 6N. Each locking projection 767n of each hook 71n is formed in a substantially columnar shape at the upper corner of the outer surface of the tip side of each hook 71n. The locking projection 767n may be formed integrally with each hook 71n, or may be separately provided on each hook 71n so as to be attachable and detachable by screwing or the like. Since the locking projection 767n is detachably attached to each hook 71n, when the locking projection 767n wears due to repeated use of the door stopper S4 for a long period of time, it is possible to easily replace the part. Each guide projection 717 of each hook 71n is provided along the lower edge of the lower part of the outer surface on the base end side of the hook 71n so as to be engageable with each guide hole 32 of each lower arm 3n rather than each guide hole 32. This convex shape has a slightly smaller, substantially arc-shaped convex shape, and this convex shape is formed thinner on the lower side and gradually thicker on the upper side from the lower side to the upper side to form a tapered surface 717t.
Each hook 71n has an intermediate pin 603 passed through the pin insertion portion 762, and is attached to a mounting bracket 68n via the intermediate pin 603. The mounting bracket 68n is attached to the lower rear surface 6DN of the stopper plate 6N, The intermediate pin 603 is arranged on the lower rear surface 6DN of the stopper plate 6N so as to be slidable from both ends to the center or vice versa.
As shown in FIG. 23, in the lock device 7n, the engaging portions 761 of the hooks 71n are engaged with the projections 741 on the outer side of the lock hole 74 when the stopper plate 6N is retracted to the retracted position. 767n of each hook 71n is engaged with each side edge of the lock hole 74, so that each hook 71n and the projection 741 of the lock hole 74 are engaged with each other. Engagement is retained. When pulling out the stopper plate 6N from the retracted position, each lock release push button 766 (see FIG. 22) is pushed to move each locking portion 761 of each hook 71n from the outer protrusion 741 of the lock hole 74 to the inner side. By shifting to the concave portion 740, the lock of the stopper plate 6N is released, and the stopper plate 6N can be pulled out from the storage position. Then, as shown in FIG. 24, when the stopper plate 6N is pulled out from the retracted position and pushed up to the door lock position, each locking projection 767n of each hook 71n engages each engagement hole 24 of each upper arm 2N. As a result, the stopper plate 6N is positioned and held at the door lock position.
When returning the stopper plate 6N from the door lock position to the retracted position, each lock release mechanism is used to release the engagement between each locking projection 767n of each hook 71n and each engagement hole 24 of each upper arm 2N. When the stopper plate 6N is returned toward the retracted position without pressing the push button 766 but without pressing the unlock push button 766, the hook auto-shift mechanism 77 moves the hooks 71n. By engaging and guiding the tapered surface 717t of the guide projection 717 and the tapered surface 33 inside the upper edge portion of each lower arm 3n, the hooks 71n move in a direction to approach each other so as to be able to pass through the concave portion 740 inside the lock hole 74. It is automatically shifted and engaged with the lock hole 740, and by the action of the subsequent hook auto-shift mechanism 77, that is, each guide projection 717 of each hook 71n and each guide hole 32 of each lower arm 3n are engaged and guided. As a result, each hook 71n is automatically shifted from the inner concave portion 740 of the lock hole 740 to the outer convex portion 741 and is engaged with the outer convex portion 741 to lock the stopper plate 6N. The stop projection 767n is engaged with each side edge of the lock hole 74 to maintain the engagement between each hook 71n and the protrusion 741 of the lock hole 74. As shown in FIG.

As shown in FIGS. 23 and 24, a mounting bracket 68n is detachably mounted on the lower rear surface of the stopper plate 6N.
As shown in FIG. 28, this mounting bracket 68n is made of a grooved plate, similar to the third embodiment, and has pin inserting pins on both sides through which upper, lower, and intermediate pins 601, 602, and 603 can be inserted. 681, 682, 683, and a button insertion portion 684 through which each unlocking push button 766 of the locking device 7n can be inserted. , 683, each unlock push button 766 is passed through each button insertion portion 684, and is attached to the lower rear surface 6DN of the stopper plate 6N via this attachment bracket 68n. Unlike the third embodiment, both sides of the mounting bracket 68n extend in a substantially D-shape so as to project toward the mounting base 1 from both sides of the stopper plate 6N. is attached to the lower rear surface 6DN of the stopper plate 6N, both sides of the stopper plate 6N protrude toward the mounting base 1 to an appropriate height, and the user grips the stopper plate 6N from the front side. In this case, a safety cover 685 is provided between the stopper plate 6N and the mounting base 1 to restrict entry of the user's fingers.

As shown in FIGS. 23 and 24, the stopper plate rotation restricting portion 8N is substantially the same as that of the third embodiment. Here, each portion of the stopper plate rotation restricting portion 8N is denoted by the same reference numeral as in the third embodiment, and redundant description thereof is omitted.

The door stopper S4 has such a structure, and like the third embodiment, the mounting portion 13 of the mounting base 1 can be engaged with the rotating door of the box-type cargo bed at the opening position of the rotating door. The stopper plate 6N is attached to the box-shaped cargo bed by being fixed to the lower part of the box-shaped cargo bed. At the opening position of the rotating door, the stopper plate 6N is pulled out from the retracted position and pushed up to the door lock position, and the holding portion 61 of the stopper plate 6N is released. It engages the pivoting door (in this case, the lower end of the locking rod) from the outside to hold the pivoting door open.

FIG. 29 illustrates a case where the door stopper S4 is applied to a van-body type truck box-shaped loading platform (aluminum container).
As shown in FIG. 29(1), the door stopper S4 holds the upper mounting portion 13 of the mounting base 1 at the opening position of the rotating door of the box-type cargo bed C and lock rods R of the rotating door. It is fixed to the lower part of the box-shaped loading platform C so as to be engageable with the lower end, and attached to the box-shaped loading platform C.
While the door stopper S4 is not used, as shown in FIG. 29(1), the stopper plate 6N faces the front of the mounting base 1 and is stored in the lower front side of the mounting base 1 at the storage position. It is held by the plate 4 and the positioning spring 5 and further locked by the locking device 7n. That is, when the stopper plate 6N is retracted to the retracted position, the pair of upper arms 2N and the pair of lower arms 3n are pivotally displaced downward to engage with the guide pins 23 of the pair of upper arms 2N. The guide plate 4 is pivotally displaced downward, and the positioning spring 5 wound around the guide plate 4 is urged downward to position the pair of upper arms 2N downward. The stopper plate 6N is held at the retracted position by positioning the upper arm 2N. The hooks 71n of the locking device 7n are pressed and biased toward both ends of the intermediate pin 603 by the coil springs 75 (see FIGS. 22 and 23) to engage the projections 741 (see FIG. 25) outside the lock hole 74. It is engaged and the stopper plate 6N is locked in the retracted position. At the same time, each locking projection 767n of each hook 71n is engaged with each side edge of the lock hole 74, and the engagement between each hook 71n and the protrusion 741 on the outside of the lock hole 74, that is, the locked state is established. retained.

When opening the rotating doors of the box-type cargo bed C, the lock rods R are removed from the upper and lower cam keepers (not shown), the left and right doors are opened, and each door is rotated 270° to open the box. It is brought parallel and close to the side of the mold carrier C. 29(1) and 29(2), the stopper plate 6N is pulled out from the retracted position and pushed up to the door lock position, in this case, the lower end of each lock rod R. , the lower end of each lock rod R is engaged with the door when it is opened from the outside.
In this case, as shown in FIGS. 29(1) and 29(2), holding the stopper plate 6N in the retracted position with one hand and pushing the lock release push buttons 766 (see FIG. 22) on both sides causes the hooks 71n to open. is slid toward the center on the intermediate pin 603, and the locking portion 761 of each hook 71n is shifted into the recess 740 of the lock hole 74 to release the lock. When the stopper plate 6N is pulled forward as it is, the locking portions 761 of the hooks 71n pass through the recesses 740 of the lock holes 74, and the pair of upper arms 2N and the pair of lower arms 3n are connected to the base end upper pins 14 and 3n, respectively. The lower pin 15 rotates upward, and along with this, the guide plate 4 engaged with the guide pin 23 of the pair of upper arms 2N also rotates upward. At this time, the guide pin 23 moves toward the proximal end of the guide plate 4 in the U-shaped groove 40 at the distal end of the guide plate 4 , thereby compressing the positioning coil spring 5 around the guide plate 4 . Subsequently, when the stopper plate 6N is pulled forward and the guide plate 4 is rotated forward to a substantially horizontal position, the guide pin 23 moves further toward the base end of the guide plate 4 within the U-shaped groove 40. As a result, the positioning spring 5 is compressed to the maximum. Then, when the stopper plate 6N is rotated slightly upward at this position, the guide pin 23 moves toward the tip of the guide plate 4 in the U-shaped groove 40 at the tip of the guide plate 4, and the positioning spring 5 is moved. is extended, the positioning spring 5 urges the upper arms 2N to rotate upward together with the guide plate 4, and the upper arms 2N are automatically rotated upward together with the guide plate 4. As shown in FIG. Due to the rotation of the pair of upper arms 2N, the stopper plate 6N is automatically rotated upward, and the pair of upper arms 2N and the pair of hooks 71n come close to each other and the locking projections of the hooks 71n are engaged. 767n face each engagement hole 24 of each upper arm 2N so as to be engageable, and push up to the door lock position, in this case, to a position where the pressing portion 61 can be engaged with the lower end of each lock rod R. In this door lock position, when the push operation of the lock release push buttons 766 on both sides of the stopper plate 6N is released, each hook 71n slides on the intermediate pin 603 to both ends, and each locking projection 767n of each hook 71n engages each upper arm. 2N of engagement holes 24, each upper arm 2N urges the positioning spring 5 to rotate upward, and engages each locking projection 767n of each hook 71N with each upper arm 2N. Positioning is held by engagement with the hole 24, and the stopper plate 6N is held by these upper arms 2N. The door lock position of the stopper plate 6N can be adjusted by adjusting the adjustment margin between each engagement hole 24 of each upper arm 2N and each locking projection 767n of each hook 71n. Further, in this case, the stopper plate rotation restricting portion 8N works further, and the stopper portion 83 at the proximal end of the pair of upper arms 2N presses against the planar stopper surface 81 provided on the back portion 11 of the mounting plate 1, The rotation of the stopper plate 6N is restricted and positioned, and the stopper plate 6N is reliably held at the door lock position. As a result, even if an external force that rotates the rotating door in the closing direction acts on the rotating door, (a part of) the peripheral surface of the lower end of each lock rod R of the rotating door is held by the upper pressing portion of the stopper plate 6N. It is held in surface contact with the front recess 612 of 61, and the pivotal door is held open.
In this way, the stopper plate 6N is pulled out to the door lock position and pressed up against the lower end of each lock rod R, and the lower end of each lock rod R is engaged with the door when it is opened from the outside. is fixed in the 270° pivot position and opened.
When pulling out the stopper plate 6N from the retracted position, each lock release push button 766 was pressed to release the locking device 7n, and the stopper plate 6N was lifted slightly from the retracted position. When the user releases the stopper plate 6N before the stopper plate 6N is automatically rotated toward the It is rotated downward and returned to the storage position. In this case, since the user has released the stopper plate 6N, there is no movement between the upper arm 2N and the lower arm 3n and the stopper plate 6N. There is no particular problem in terms of safety because fingers are not caught between the upper rear surface 6UN and the mounting base 1. Moreover, even so, while the stopper plate 6N is rotating downward, the user should not put his/her finger between each upper arm 2N and each lower arm 3N or between the upper rear surface 6UN of the stopper plate 6N and the mounting base. 1, both sides of the mounting bracket 68n on the rear surface of the stopper plate 6N protrude toward the mounting base 1 from both sides of the stopper plate 6N so that the stopper plate 6N and the mounting base 1 Since there is a safety cover 685 that restricts the entry of the user's fingers between and, the user's fingers will not be caught between the stopper plate 6N and the mounting base 1.例文帳に追加

Further, when closing the rotating door of the box-type cargo bed C, the stopper plate 6N is retracted to the retracted position. In this case, as shown in FIGS. 29(1) and 29(2), when the stopper plate 6N in the door lock position is gripped with one hand and the lock release push buttons 766 on both sides are pushed with the thumb and the middle finger or the index finger, each The hooks 71n are slid toward the center on the intermediate pin 603, the locking projections 767n of the hooks 71n are disengaged from the engaging holes 24 of the upper arms 2N, and the locking portions 761 of the hooks 71n are engaged with the locking holes. 74 (that is, each hook 71N can pass through the recess 740 of the lock hole 74). The stopper plate 6N may be pushed back toward the retracted position as it is. When the pair of upper arms 2N and the pair of lower arms 3n are slightly lowered from the locked position and rotated downward about the upper pin 14 and the lower pin 15 at the proximal ends, respectively, the stopper plate 6N is pulled up. By each operation of the guide pin 23, the guide plate 4 and the positioning spring 5 opposite to , the guide plate 4 engaged with the guide pin 23 of the pair of upper arms 2 is urged to rotate downward, and the stopper plate 6N. is automatically rotated downward. From that point on, there is no need to press each unlocking push button 766, and even if each unlocking push button 766 is released, the stopper plate 6N is automatically rotated toward the retracted position, and the stopper plate 6N is removed from the mounting base 1. , this time, due to the action of the hook auto-shift mechanism 77, that is, mutual engagement between the tapered surface 717t of each guide projection 717 of each hook 71n and the tapered surface 33 inside the upper edge of each lower arm 3n. By the mating guide, the hooks 71n are automatically shifted in the direction of approaching each other so as to be able to pass through the recess 740 of the lock hole 74, and the engaging portion 761 of each hook 71N engages the recess 740 of the lock hole 74 of each lower arm 3N. It passes through and engages with the lock hole 74, and this state is held by the positioning spring 5 wound around the guide plate 4 being urged downward and the pair of upper arms 2N being positioned downward, At the same time, due to the action of the hook auto-shift mechanism 77, that is, each guide projection 717 of each hook 71n is guided by each guide hole 32 of each lower arm 3n and fitted into each guide hole 32, thereby each hook 71n is moved. The stopper plate 6N is automatically shifted from the concave portion 740 of the lock hole 740 to the convex portion 741, and the engagement between each hook 71n and the convex portion 741 of the lock hole 74 locks the stopper plate 6N. is engaged with each side edge of the lock hole 74, and the engagement state between each hook 71n and the protrusion 741 of the lock hole 74 is maintained. Thus, the stopper plate 6N is automatically returned to the retracted position and completely locked.
In this way, the stopper plate 6N is automatically retracted. After the stopper plate 6N is retracted, the rotating door of the box-type cargo bed C is closed, and the upper and lower ends of the lock rod R are fixed by the upper and lower cam keepers. be.
In the door stopper S4, when closing the rotating door of the box-type cargo bed C and returning the stopper plate 6N from the door lock position to the retracted position, the locking protrusions 767n of the hooks 71n and the upper portions of the door stoppers 767n are closed. Each lock release push button 766 is pressed to release the engagement with each engagement hole 24 of the arm 2N. 24, when the stopper plate 6N is slightly lowered from the door lock position, the guide plate 4 engaged with the guide pins 23 of the pair of upper arms 2 is biased to rotate downward. is automatically rotated toward the retracted position, and is retracted and locked at the retracted position by the locking device 7n through the hook auto-shift mechanism 77. Therefore, each unlocking push button 766 is pressed to press each hook 71n. is removed from each engagement hole 24 of each upper arm 2N, the stopper plate 6N is slightly lowered from the door lock position, and the stopper plate 6N is automatically rotated toward the retracted position. , the user can release the stopper plate 6N, and by releasing the stopper plate 6N, the space between each upper arm 2N and each lower arm 3n and between the upper rear surface 6UN of the stopper plate 6N and the mounting base 1 There is no such thing as pinching a finger between. Moreover, even so, while the stopper plate 6N is rotating downward, the user should not put his/her finger between each upper arm 2N and each lower arm 3N or between the upper rear surface 6UN of the stopper plate 6N and the mounting base. 1, both sides of the mounting bracket 68n on the rear surface of the stopper plate 6N protrude toward the mounting base 1 from both sides of the stopper plate 6N so that the stopper plate 6N and the mounting base 1 Since there is a safety cover 685 that restricts the entry of the user's fingers between and, the user's fingers will not be caught between the stopper plate 6N and the mounting base 1.例文帳に追加
Further, each lock release push button 766 is pushed to disengage each locking projection 767n of each hook 71n from each engagement hole 24 of each upper arm 2N, and the stopper plate 6N is slightly lowered from the door lock position. Even if the user releases the stopper plate 6N before the guide plate 4 is automatically rotated toward the storage position, in this case, the positioning spring 5 of the guide plate 4 is attached upward at that position. Since the stopper plate 6N is rotated upward and is held by the upward rotational bias of the positioning spring 5, there is no particular problem in terms of safety.

Even in this way, the same effects as those of the third embodiment can be obtained, and the following special effects unique to this embodiment can be obtained.
(1) This door stopper S4 is also equipped with a locking device 7n for locking the stopper plate 6N at the retracted position. In this case, the locking device 7n is formed between a pair of lower arms 3n in the middle in the longitudinal direction, and has a projection 741 on the outside of the edge corresponding to the other end side of each lower arm 3n and a recess 740 on the inside thereof. The rotation of the intermediate pin 603 is restricted by the lock hole 74 divided into two and the intermediate pin 603 whose one end is bridged in parallel between the upper and lower pins 601 and 602 of the lower side back surface 6DN of the stopper plate 6N. , and the other end is hook-shaped or claw-shaped so that it can pass through the recess 740 inside the lock hole 74 of the pair of lower arms 3n and can be locked to the protrusion 741 outside. A pair of hooks 71n are formed, and the intermediate pin 603 is wound between the hooks 71n. In a normal state, each hook 71n is directed toward both ends of the intermediate pin 603, and each hook 71n is attached to the convex portion 741 outside the lock hole 74. A coil spring 75 as a spring member that presses and urges the hooks 71n so as to be engageable, and the hooks 71n on the intermediate pin 603 on both sides of the stopper plate 6N formed on one end side of the hooks 71n can be pressed toward each other. A pair of unlocking push buttons 766 arranged to shift each hook 71n from the outer protrusion 741 toward the inner recess 740 of the lock hole 74, and a pair of lower portions on the outer surface of one end side of each hook 71n. It protrudes from the upper edge of the arm 3n so as to be engageable with the inner surface (in this case, the tapered surface 33 inside the upper edge), and when the stopper plate 6N is returned to the retracted position, the upper edge of each lower arm 3n and the A pair of guide protrusions (having tapered surfaces 717t) that press the hooks 71n toward each other by engaging with the inner surface and shift the hooks 71n so as to be able to pass through the recess 740 inside the lock hole 74. 717 and each hook 71n formed on the other end side of each lower arm 3n and passing through a concave portion 740 inside the lock hole 74 is shifted toward both ends of the intermediate pin 603 by the biasing force of the coil spring 75, thereby opening the lock hole 74. A hook auto-shift mechanism 77 consisting of a pair of guide holes 32 for letting each guide projection 717 escape from the inner surface toward the outer surface of each lower arm 3n so as to be able to engage with the outer convex portion 741 of the lower arm 3n. .
In this way, when the stopper plate 6N is housed in the housed position, each hook 71n is engaged with the projection 741 outside the lock hole 74 to lock the stopper plate 6N and move the stopper plate 6N to the housed position. When pulling out from the stopper plate 6N, each hook 71n is shifted from the convex portion 741 outside the lock hole 74 to the concave portion 740 inside the lock hole 74 by pressing each lock release push button 766, thereby unlocking the stopper plate 6N. By slightly pulling up the plate 6N, the stopper plate 6N is automatically rotated upward, and the pair of upper arms 2N and the pair of hooks 71n approach each other so that the locking projections 767n of the hooks 71n engage with the upper arms. Each hook 71n engageably faces each engagement hole 24 of 2N and rises to the door lock position. is engaged with each engagement hole 24 of each upper arm 2N, and each upper arm 2N urges the positioning spring 5 to rotate upward and each locking projection 767n of each hook 71N. and the engagement holes 24 of the upper arms 2N, and the stopper plate 6N is held by the upper arms 2N. There are no particular problems in terms of safety in operation. When returning the stopper plate 6N to the retracted position, in the case of the door stopper S4, each locking projection 767n of each hook 71n is disengaged from each engagement hole 24 of each upper arm 2N. It is necessary to press the lock release push button 766 once, but after releasing the lock release push button 766, the stopper plate 6N is returned toward the retracted position. It is rotated downward, and by the action of the hook auto-shift mechanism 77 without pressing each lock release push button 766, each guide projection 717 of each hook 71n (the tapered surface 717t) and each lower portion By engaging and guiding the upper edge of the arm 3n and the inner side surface (in this case, the tapered surface 33), the respective hooks 71n are automatically shifted toward each other so as to be able to pass through the recess 740 inside the lock hole 74. , lock hole 74, and by the action of the hook auto-shift mechanism 77, that is, by the engagement of each guide projection 717 of each hook 71n with each guide hole 32 of 3n of the lower arm, each hook 71n is moved. Since the recess 740 on the inside of the lock hole 74 is automatically shifted to the protrusion 741 on the outside to engage with the protrusion 741 on the outside, when the stopper plate 6N is returned to the retracted position, each lock release push button is pressed. After each locking projection 767n of each hook 71n is removed from each engagement hole 24 of each upper arm 2N by the pushing operation of 766, the stopper plate 6N is slightly lowered from the door lock position, and the stopper plate 6N is moved to the retracted position. , the user can release the stopper plate 6N. Fingers are not caught between the upper rear surface 6UN of the stopper plate 6N and the mounting base 1. - 特許庁
In addition, even so, while the stopper plate 6N is rotating upward or downward, it should be possible for the user to put his or her finger between the upper arm 2N and the lower arm 3N or the upper rear surface 6UN of the stopper plate 6N. and the mounting base 1, both side portions of the mounting bracket 68n on the rear surface of the stopper plate 6N protrude toward the mounting base 1 from both sides of the stopper plate 6N. Since the safety cover 685 restricts entry of the user's fingers between the mounting base 1 and the stopper plate 6N, the user's fingers are not caught between the stopper plate 6N and the mounting base 1.例文帳に追加
In this door stopper S4, each unlocking push button 766 is pressed to release the locking device 7n, the stopper plate 6N is slightly lifted from the storage position, and the stopper plate 6N is automatically rotated toward the door lock position. After that, at the door lock position, the locking projections 767n of the hooks 71n and the engaging holes 24 of the upper arms 2N are engaged from the state in which the positioning springs 5 of the guide plates 4 are biased upward. The stopper plate 6N is held at the door lock position by combining the stopper plate 6N with the door lock position. Each locking projection 767 of the hook 71N and each engagement hole 24 of each upper arm 2N may be omitted. In this case, when returning the stopper plate 6N to the retracted position, the stopper plate 6N is pushed down a little without pushing the both lock release push buttons 766, and the stopper plate 6N is automatically directed downward. After that, the hook auto-shift mechanism 77 automatically shifts the hooks 71n toward each other so that they can pass through the concave portion 740 inside the lock hole 74, thereby moving toward the lock hole 74. When engaged, each hook 71n automatically shifts from the recess 740 inside the lock hole 74 to the protrusion 741 outside the lock hole 74 and engages with the protrusions 741 on both sides. Operation can be made easier.
(2) The door stopper S4 also has a pair of locking projections 767n on the outer surface of the other end of each hook 71n that can be engaged with each side edge of the lock hole 74, and the stopper plate 6N is moved to the retracted position. When the hooks 71n are locked by being engaged with the projections 741 on both sides of the lock hole 74, the locking protrusions 741 are engaged with the side edges of the lock hole 74, and the hooks 71n are locked. and the projection 741 on the outer side of the lock hole 74 are retained, the locked state at the retracted position of the stopper plate 6N can be reliably retained.
Further, a pair of engagement holes 24 are drilled in the other end of each upper arm 2N so that each locking projection 767n on the other end of each hook 71n can be engaged, and the stopper plate 6N approaches the door lock position. When raised, each locking projection 767n engages each engagement hole 24 of each upper arm 2N to position and hold the stopper plate 6N at the door lock position. The stopper plate 6N can be reliably held at the door lock position when the door is pushed up.
(3) Also in this door stopper S4, the attachment bracket 68n is detachably attached to the lower rear surface 6DN of the stopper plate 6N. The mounting bracket 68n is formed of a grooved plate, and has pin insertion portions 681, 682, 683 through which upper, lower, and intermediate pins 601, 602, 603 can be inserted, and unlock push buttons 766 of the lock device 7n. The upper, lower, and intermediate pins 601, 602, 603 are inserted into the respective pin insertion portions 681, 682, 683, and each unlocking push button 766 is each unlocking push button. Since it is passed through the button insertion part 684 and attached to the lower rear surface 6DN of the stopper plate 6N via the attachment bracket 68n, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced.
Further, both sides of the mounting bracket 68n extend toward the mounting base 1 from both sides of the stopper plate 6N, and project toward the mounting base 1 from both sides of the stopper plate 6N, so that the user can easily use the stopper. When the plate 6N is gripped from the front side, a safety cover 685 is provided between the stopper plate 6N and the mounting base 1 to restrict entry of the user's fingers. During the rotation, it is possible that a finger may be extended between each upper arm 2N and each lower arm 3n or between the upper rear surface 6UN of the stopper plate 6N and the mounting base 1. Even if there is, both sides of the mounting bracket 68n on the back surface of the stopper plate 6N, that is, the safety cover 685, reliably prevent the fingers of the user from being caught between the stopper plate 6N and the mounting base 1. be able to.

S, S2, S3, S4 Door stopper for box-shaped carrier 1 Mounting base 11 Rear part 12 Support plate (side part)
121 Upper pin insertion portion 122 Lower pin insertion portion 123 Intermediate pin insertion portion 13 Mounting portion (extension portion)
14 upper pin 15 lower pin 16 intermediate pin 2, 2N upper arm 201 upper pin insertion portion 202 upper pin insertion portion 203 guide pin insertion portion 21 arm connecting portion 22 slit 23 guide pin 24 engagement hole 3, 3N, 3n lower arm 301 lower pin insertion portion 302 lower pin insertion portion 31 arm connecting portion 32 guide hole 33 tapered surface 4 guide plate 4A guide portion 40 U-shaped groove 4B bearing 41 intermediate surface portion 42 side portion 420 hole 5 positioning spring 6, 6N stopper plate 6U , 6UN Upper side rear surface 6D, 6DN Lower side rear surface 601 Upper pin 602 Lower pin 603 Intermediate pin 61 Pressing portion 611 Block 612 Recessed portion 613 Flat portion 614 Screw insertion portion 62 Mounting portion 63 Shielding portion 630 Recessed portion 63P Pin support portion 631 Groove 632 Groove 633 Groove 634B Boss 634 Groove 635B Boss 635 Groove 636 Mounting recess 64 Mounting bracket 641 Groove 642 Groove 643 Groove 651 Female threaded portion 652 Female threaded portion 661 Mounting piece 662 Mounting piece 67 Mounting boss 68, 68n Mounting bracket 681, 682, 683 Pin insertion portion 684 button insertion portion 685 safety cover s mounting screw 7, 7N, 7n lock device 70 lock hole 71, 71N, 71n hook 711 hook lever 712 locking portion 713 pin insertion portion 714 support portion 715 connecting portion 716 spindle 717 guide projection 717t Tapered surface 72 Spring member (torsion spring)
73 Unlock lever 74 Lock hole 740 Concave portion 741 Protruding portion 75 Coil spring (spring member)
761 locking portion 762 pin insertion portion 763 hook main body 764 support portion 765 button portion 766 unlocking push button 767, 767n locking projection 768 locking portion 769 tapered surface 77 hook auto-shift mechanism 8, 8N stopper plate rotation restricting portion 81 Stopper surface 82 Stopper part 83 Stopper part 9 Safety cover 91 Upper left and right pair of covers 911 Convex part 92 Lower left and right pair of covers 921 Connecting part 93 Upper connecting part 94 Mounting part 95 Lower connecting part C Box-type carrier R Lock rod

Claims (13)

A door stopper for a box-shaped loading platform that engages with the rotating door at an open position of the rotating door of the box-shaped loading platform to hold the open state of the rotating door,
a mounting base having a mounting portion on the top and a pair of support plates on both sides;
A pair of upper parts, one end of which is vertically rotatably mounted via an upper pin and a lower pin that are installed parallel to the upper and lower parts between the support plates of the mounting base and protrude outside the support plates. an arm and a pair of lower arms;
One end is mounted rotatably in the vertical direction via an intermediate pin that is laid in parallel between the upper and lower pins between the support plates of the mounting base, and the other end is a long U-shaped tip. a guide plate having a groove, the groove being engaged with a guide pin extending between the longitudinally intermediate portions of the pair of upper arms and protruding to the outside of each of the support plates; and a periphery of the guide plate. a positioning spring wound around and placed under compression between the intermediate pin and the guide pin;
The pair of upper arms and the pair of lower arms are connected via an upper pin and a lower pin that are vertically installed on the lower rear surface, and have a pressing portion that can be engaged with the rotating door on the upper rear surface. The other end is attached so as to be vertically rotatable, and can be stored in a storage position facing the front of the mounting base and in contact with the front lower side of the mounting base. a stopper plate arranged to be able to rise to a door lock position engageable with the rotating door;
with
The attachment portion of the mounting base is fixed to the box-type cargo bed so that it can be engaged with the rotary door at the opening position of the rotary door of the box-shaped cargo bed. is,
At the open position of the rotary door, the stopper plate is pulled out from the storage position and pushed up to the door lock position, and the pressing portion of the stopper plate is engaged with the rotary door from the outside. to hold the pivotal door open;
A door stopper for a box type cargo bed characterized by: A lock device for locking the stopper plate at the retracted position is also provided, and the lock device includes a lock hole formed between the longitudinally intermediate portions of the pair of lower arms, and one end of which is located above and below the lower back surface of the stopper plate. It is mounted so as to be vertically rotatable via an intermediate pin that spans between the pins in parallel, and the other end is formed in a hook shape or claw shape so that it can be engaged with the lock hole of the pair of lower arms. a hook, a spring member for urging the hook to rotate in the direction of the lock hole so that the hook can be engaged with the lock hole of the pair of lower arms, and a spring member formed at one end of the hook and rotated to both sides of the stopper plate. a lock release lever movably disposed for rotating the hook in a direction to release it from the lock hole; and pushing the stopper plate back from the door lock position to the retracted position to release the hook from the lock. 2. A door stopper for a box-type cargo bed according to claim 1, comprising an auto-locking mechanism for automatically engaging with the hole, wherein unlocking is performed by manual operation of said unlocking lever. A stopper plate rotation restricting portion for restricting rotation of the stopper plate at the door lock position is also provided. 3. The door stopper for a box-type cargo bed according to claim 1, further comprising a stopper portion projecting from one end of the arm so as to come into contact with the stopper surface of the mounting plate at the door lock position of the stopper plate. A pin support portion formed on the lower rear surface of the stopper plate and having a groove with a semicircular or U-shaped cross section at the tip end thereof so as to be able to support the upper, lower, and intermediate pins, and a cover on the lower rear surface. and a box-shaped mounting bracket having grooves with semicircular or U-shaped cross sections on both side surfaces that can be engaged with the upper, lower, and intermediate pins. 4. The door stopper for a box-type cargo bed according to claim 1, wherein the door stopper is sandwiched and supported between the groove and the groove of the mounting bracket. Cam keepers are provided on the top and bottom of the box-type cargo bed on the top and bottom of the rotatable door, and the rotatable door is engaged with the cam keepers on the top and bottom to determine the closed state of the rotatable door. 5. A door stopper for a box-type cargo bed according to claim 1, further comprising a lock rod for holding the door, wherein the pressing portion of the stopper plate is engaged with the lower end of said lock rod. The stopper plate protrudes from both sides of the stopper plate toward the mounting base, and when the user grips the stopper plate from the front side, the user's fingers enter the upper back surface of the stopper plate; 6. The safety cover according to any one of claims 1 to 5, further comprising a safety cover for restricting a user's fingers from entering between a pair of upper arms and a pair of lower arms extending between said stopper plate and said mounting base. Door stopper for box type cargo bed. A locking device for locking the stopper plate at the retracted position is also provided, and the locking device is formed between the longitudinally intermediate portions of the pair of lower arms, and is formed on both sides of the end edge portion corresponding to the other end side of each of the lower arms. A lock hole having a convex portion and a concave portion in the middle thereof, and an intermediate pin whose one end is spanned in parallel between the upper and lower pins on the lower side back surface of the stopper plate. and the other end is formed in a hook shape or claw shape so as to be able to pass through the intermediate concave portion with respect to the lock hole of the pair of lower arms and to be engageable with the convex portions on both sides. A pair of hooks are wound around the intermediate pin between the hooks, and in a normal state, the hooks are arranged in the direction of both ends of the intermediate pin, and the hooks can be engaged with the protrusions on both sides of the lock hole. A spring member that presses and urges the hooks is formed on one end side of each of the hooks and is arranged on both sides of the stopper plate so as to be able to press the hooks on the intermediate pin in a direction toward each other, and the hooks are arranged on the stopper plate. and a pair of unlock push buttons for shifting from the protrusions on both sides of the lock hole toward the recess in the middle. When the stopper plate is locked by being engaged with the protrusions on both sides of the hole and the stopper plate is pulled out from the storage position, the lock release push buttons are pushed to move the hooks out of the lock hole. When shifting from the protrusions on both sides to the intermediate recess to unlock the stopper plate and return the stopper plate to the storage position, each of the lock release push buttons is pressed to return the stopper plate to the storage position. 2. The door stopper for a box-type cargo bed according to claim 1, wherein the hooks are shifted toward each other so as to be able to pass through the intermediate recesses of the lock holes to engage with the lock holes. A stopper plate protrudes from the outer surface of the other end side of each hook of the locking device so as to be engageable with the upper edge of the pair of lower arms and engageably with each side edge of the lock hole. When the user tries to return to the storage position without pressing the button, the upper edge of each of the lower arms is engaged to stop the rotation of each of the lower arms, and the lower arms and the pair of upper arms are engaged with each other. and between the upper rear surface of the stopper plate and the mounting base, a constant distance is maintained to the extent that at least the user's fingers are not caught, and the hooks are attached to the protrusions on both sides of the lock hole 8. The hook according to claim 7, further comprising a pair of locking projections which, when engaged and locked, engage each side edge of said lock hole to maintain engagement between each hook and said lock hole. Door stopper for box-type cargo bed. The pair of locking projections has a thick lower portion and a lower end serving as a locking portion, and an upper portion which is gradually thinned upward from the lower side to form a tapered surface. When the plate is pushed up to the door lock position, each of the locking projections is perforated so as to be engageable, and by the engagement of each of the locking projections, the stopper plate is pushed up to the door locking position. 9. A door stopper for a box-type cargo bed according to claim 8, having a pair of engaging holes for positioning and holding each upper arm. A mounting bracket is detachably attached to the back surface of the lower side of the stopper plate, and the mounting bracket consists of a grooved plate, and has a pin insertion part through which upper, lower and middle pins can be inserted on both sides, and unlocking of the locking device. a button insertion portion through which a push button can be inserted; the upper, lower, and intermediate pins are inserted into the pin insertion portions; and the lock release push buttons are inserted through the button insertion portions, 10. The door stopper for a box-type cargo bed according to any one of claims 7 to 9, wherein the door stopper is arranged on the back surface of the lower side of the stopper plate via a mounting bracket. A locking device for locking the stopper plate at the retracted position is also provided, and the locking device is formed between the longitudinally intermediate portions of the pair of lower arms, and is formed on both sides of the end edge portion corresponding to the other end side of each of the lower arms. A lock hole having a convex portion and a concave portion in the middle thereof, and an intermediate pin whose one end is spanned in parallel between the upper and lower pins on the lower side back surface of the stopper plate. and the other end is formed in a hook shape or claw shape so as to be able to pass through the intermediate concave portion with respect to the lock hole of the pair of lower arms and to be engageable with the convex portions on both sides. A pair of hooks are wound around the intermediate pin between the hooks, and in a normal state, the hooks are arranged in the direction of both ends of the intermediate pin, and the hooks can be engaged with the protrusions on both sides of the lock hole. A spring member that presses and urges the hooks is formed on one end side of each of the hooks and is arranged on both sides of the stopper plate so as to be able to press the hooks on the intermediate pin in a direction toward each other, and the hooks are arranged on the stopper plate. A pair of unlock push buttons for shifting from the projections on both sides of the lock hole toward the middle recess, and a pair of lock release push buttons on the outer surface of one end side of each of the hooks extending from the upper edge of the pair of lower arms to the inner surface. When the stopper plate is returned to the retracted position, the hooks are engaged with the upper edges and the inner side surfaces of the lower arms to press the hooks toward each other. a pair of guide projections for shifting the hooks so as to be able to pass through the intermediate recesses of the lock holes; In order to shift the guide projections from the inner surface toward the outer surface of each lower arm so that they can be shifted toward both ends of the intermediate pin by the biasing force of the spring member and can be engaged with the protrusions on both sides of the lock hole. and a hook auto-shift mechanism consisting of a pair of guide holes, and when the stopper plate is stored in the storage position, the hooks are engaged with the protrusions on both sides of the lock hole. , when the stopper plate is locked and the stopper plate is pulled out from the storage position, the respective hooks are moved from the convex portions on both sides of the lock hole to the concave portion in the middle by pressing the unlocking push buttons. When shifting, releasing the lock of the stopper plate, and returning the stopper plate to the storage position, each of the unlocking push buttons is pressed. The engagement of the guide projections of the hooks with the upper edges and the inner surfaces of the lower arms, which act as the hook auto-shift mechanism, allows the hooks to be moved to the intermediate positions of the lock holes. are automatically shifted in a direction approaching each other so as to be able to pass through the recesses of the hooks, and are engaged with the lock holes to act as the hook auto-shift mechanism. 2. The box-type cargo bed according to claim 1, wherein the hooks are automatically shifted from the intermediate concave portion of the lock hole to the convex portions on both sides by engaging with the respective guide holes to engage with the convex portions on both sides. door stopper. A pair of engagement holes are formed in the other end of each upper arm, and the outer surface of the other end of each hook can be engaged with each side edge of the lock hole and each engagement hole of each upper arm. When the stopper plate is returned to the retracted position and the hooks are engaged with the protrusions on both sides of the lock hole and locked, each of the locking projections engages with the lock. Each hook is engaged with each side edge of the hole to hold the engagement between each hook and the lock hole. 12. The door stopper for a box-type cargo bed according to claim 11, wherein the stopper plate is positioned and held at the door lock position by engaging with the respective engagement holes of the upper arm. A mounting bracket is detachably attached to the back surface of the lower side of the stopper plate, the mounting bracket is formed of a grooved plate, and both sides thereof extend from both sides of the stopper plate so as to protrude toward the mounting base, The both sides have a pin insertion portion into which the upper, lower, and intermediate pins can be inserted, and a button insertion portion into which each lock release push button of the locking device can be inserted, and the upper, lower, and intermediate pins are inserted into the pin insertion portions. each of the lock release push buttons is passed through each of the button insertion portions and attached to the bottom side back surface of the stopper plate via the mounting bracket, and the two side portions of the mounting bracket are The stopper plate protrudes from both sides of the stopper plate toward the mounting base, and restricts the user's fingers from entering between the stopper plate and the mounting base when the user grips the stopper plate from the front side. 13. The door stopper for a box type cargo bed according to claim 11 or 12, which serves as a safety cover.

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