JP4463602B2 - Latching device for door opening / closing handle - Google Patents

Description

  The present invention mainly relates to a latching device that locks a door opening / closing handle provided in a cargo box of a truck at a lock position.

  Generally, in a cargo box, a pair of bearings are attached to the outer surface of a door that opens and closes an opening provided at the rear or side, and the door is opened and closed on a lock shaft whose both ends are rotatably supported by the bearing. One end of the handle is pivotally connected, the lock shaft is rotated by operating the door opening / closing handle, and the lock cams provided at the upper and lower ends of the lock shaft are engaged with the cam keeper provided at the upper and lower sides of the cargo box. In combination, the door is kept closed.

  Also, a latching device is provided on the outer surface of the door, and the door opening / closing handle is locked at the lock position by the latching device.

  As a latching device for locking a door opening / closing handle at a lock position, a device described in Patent Document 1 has been conventionally known.

  In the latching device described in Patent Document 1, the lower end portion of the movable main body is rotatably attached to the fixed main body attached to the door, and the hook lever is fitted into the split groove formed on the upper portion of the movable main body. The hook lever is urged in the upright direction by a spring mechanism, and engages the upper side of the door opening / closing handle that swings the hook portion provided at the tip of the hook lever to the locked position. Thus, the door opening / closing handle is locked at the lock position.

  Since the latching device as described above is attached to the outer surface of the door, if the operator who loads and unloads the luggage is in the packing box, the door opening / closing handle should be locked. An operator is trapped in the box and cannot escape, which is extremely dangerous in the case of a cold car.

In order to solve such a problem, in the latch device described in Patent Document 1, a connector is swingably attached to a fixed body, and a claw portion at the tip of the connector is provided on a movable body. The movable body is engaged by engaging the recess, holding the connector in an engaged state by a stopper that can be pulled out to the inside of the door, releasing the connector by pulling out the stopper, and then pushing the door out of the cargo box. At the same time, the hook lever is tilted down to unlock the latching device.
JP-A-9-287334

  By the way, in the latching device described in the above-mentioned patent document 1, since the connector is configured to swing in the disengagement direction by its own weight by pulling out the stopper, when the resistance at the rotation center of the stopper is large, the connector is There is an inconvenience that the engagement cannot be released and the reliability of unlocking the latching device from the door inner surface side is poor.

  Further, when unlocking the hook lever, the operation of pulling out the stopper and the two operations of pushing in the door are required, so that the operability is poor.

  The subject of this invention is providing the latch device of the handle | steering-wheel for door opening / closing excellent in the operativity which can be unlocked easily and reliably from the inside of a packing box.

In order to solve the above-described problems, in the present invention, a fixed seat plate attached to a door end side end portion of a door and provided with a pair of opposed side walls on both sides of the surface, and a lower end portion by the pair of side walls. A center portion in the length direction is rotatably supported by a supported lever support body and a bifurcated piece formed on the upper portion of the lever support body, and a door opening / closing handle is formed by a hook formed on the upper portion. A hook lever that prevents upward swing, a spring that biases the hook lever in a direction in which the hook engages with a door opening / closing handle, and a swing support supported by the lever support, A holding lever that prevents the lever support body from swinging in the overlying direction by engaging with the provided engagement piece, a spring that urges the holding lever toward the engaging direction, and an operation from the door inner surface side Reva held by The Ri and an operating means for swinging the disengaging direction, said operation means, the tip through the door Surasudo freely faces the provided continuously been operated piece swinging side end portion of the holding lever push A configuration was adopted in which a rod was provided and the push rod was urged away from the operating piece by a return spring .

  In the door opening / closing handle latching device according to the present invention, the spring for urging the hook lever in the engaging direction is a compression spring, and the compression spring is urged in the middle of swinging in the hook lever disengaging direction. By providing the direction to be switched, the hook lever can be held in the engaged state or the disengaged state, and the door opening / closing handle is swung in the undulation direction with the pushing of the lower end of the hook lever released. Can be made.

  In addition, if a taper surface is provided on the upper side of the hook of the hook lever, the taper surface is pushed by the door opening / closing handle when the door opening / closing handle that has been swung to the lock position is swung downward from above the hook lever. The hook lever swings in a downward direction, and when the door opening / closing handle passes the hook position, the hook lever is returned to the engagement position by the spring elasticity, so the door opening / closing handle is automatically locked. can do.

  In the latching device having the above-described configuration, when the operating lever is operated from the door inner surface side and the holding lever is pushed in, the holding lever swings to disengage the engagement piece from the disengaged state. When the holding lever is further pushed in, the lever support swings in the direction of lying down around the lower part, and the hook lever swings together with the lever support to be in the lying down state. The latching device can be reliably unlocked from the inside. Moreover, since the unlocking operation is one operation by pushing the operating means, a latching device with excellent operability can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a door A that opens and closes an opening of a cargo box of a lorry is supported by one side by a hinge (not shown) and can be opened and closed. A lock shaft 1 extending in the direction is provided.

  The upper and lower ends of the lock shaft 1 are rotatably supported by a bearing (not shown) attached to the outer surface of the door A. When the lock shaft 1 is rotated about the axis, the upper and lower ends are provided. A lock cam (not shown) is engaged with cam keepers provided at the top and bottom of the cargo box so that the door A is held in a closed state.

  A pair of support pieces 2 are provided in the central portion in the length direction of the lock shaft 1, and one end portion of the door opening / closing handle 4 is rotatably supported by a pin 3 supported by the support piece 2. When the door opening / closing handle 4 is swung around the lock shaft 1, the lock shaft 1 is rotated and the door opening / closing handle 4 is swung to a position (lock position) substantially parallel to the outer surface of the door A. Then, the lock cams (not shown) at the upper and lower ends of the lock shaft 1 engage with the cam keeper (not shown), and the door A is locked in the closed state.

  On the outer surface of the door A, a latching device 10 for locking the door opening / closing handle 4 displaced to the lock position is provided.

  As shown in FIGS. 1 and 2, the latch device 10 has a fixed seat plate 11, and a pair of side walls 12 are provided on both sides of the surface of the fixed seat plate 11, and is formed between the upper portions of the side walls 12. An engagement piece 14 is provided downward from the upper side of the punching window 13.

  A plurality of bolt insertion holes 15 are formed in the fixed seat plate 11, and the fixed seat plate 11 is fixed to the door A by tightening bolts that are inserted into the respective bolt insertion holes 15 and screwed into the door A. .

  A lever support 16 is fitted between the pair of side walls 12 of the seat plate 11. As shown in FIG. 7, a pair of pin holes 17 are provided coaxially in the lower portions on both sides of the lever support 16, and a pin 18 and a spring 19 that presses the pin 18 outward are provided in each pin hole 17. It is incorporated.

  As shown in FIG. 2, the pin 18 can be inserted into a pin hole 20 provided in the lower part of the opposed inner surfaces of the pair of side walls 12. By inserting the pin 18 into the pin hole 20, the lever support 16 Is supported up and down around the pin 18.

  Here, the pin hole 20 is a long hole from the relationship of manufacturing the fixed seat plate 11 by die casting, but it may be a circular hole. When the pin hole 20 is a long hole, as shown in FIG. 5, a U-shaped presser frame 21 is screwed to the lower part of the surface of the fixed seat plate 11 facing the door A, and bent at both ends of the presser frame 21. The piece 22 prevents the pin 18 from moving along the pin hole 20.

  As shown in FIGS. 2 and 4, the lever support 16 has a bifurcated piece 23 at an upper portion, and a hook lever 24 is provided between the bifurcated pieces 23. The hook lever 24 is supported by a pin 25 supported at both ends by a bifurcated piece 23 so that the substantially central portion in the length direction can be rotated. Therefore, the hook lever 24 can be raised and lowered with the pin 25 as a center, and the upper portion of the hook lever 24 is positioned above the upper surface of the bifurcated piece 23 and the lower end portion is a stopper provided between the lower portions of the bifurcated piece 23. The hook 26 is opposed to the plate 26 in the front-rear direction, and the hook lever 24 is prevented from swinging in the direction in which the upper part of the hook lever 24 is tilted toward the fixed seat 11 by the contact of the lower end of the hook lever 24 with the inner surface of the stopper plate 26.

  As shown in FIGS. 4 and 7, a protrusion 27 is provided in the middle of the surface of the hook lever 24 facing the fixed seat plate 11. A hook 28 is provided at the upper end of the hook lever 24, and a tapered surface 28 a is provided above the hook 28.

  When the hook lever 24 is raised, the upper surface of the protrusion 27 is substantially the same as the upper surface of the side wall 12 formed on the fixed seat plate 11, and the door opening / closing handle is formed by the protrusion 27 and the upper surface of the side wall 12. 4 is supported. In this supported state, the hook 28 faces the upper side of the door opening / closing handle 4 and prevents the door opening / closing handle 4 from swinging upward.

  As shown in FIG. 7, a pair of left and right protrusions 29 are provided on the surface of the lever support 16 that faces the fixed seat plate 11, and both ends of the spring seat 30 are fixed to the pair of protrusions 29.

  As shown in FIG. 4, the spring seat 30 has an inclined plate portion 31, and a bifurcated piece 32 a provided at one end of the spring holder 32 is engaged with the upper edge of the inclined plate portion 31. A bifurcated piece 32 b is provided at the other end of the spring holder 32, and the bifurcated piece 32 b is engaged with a pin 33 provided below the protrusion 27 of the hook lever 24.

  A compression spring 34 is provided outside the spring holder 32, and the spring 34 biases the hook lever 24 in a direction in which the hook 28 is engaged with the upper surface of the door opening / closing handle 4 supported by the protrusion 27. ing.

  Here, when the compression lever 34 swings around the pin 25 in the down direction and the pin 33 swings to a position beyond the straight line connecting the upper edge of the inclined plate portion 31 and the pin 25, The urging direction is switched, and the hook lever 24 is urged in a downward direction.

  As shown in FIG. 5, the lever support 16 is provided with a lever support pin 35 at a position corresponding to the engagement piece 14 provided on the fixed seat plate 11, and the holding lever 36 is centered on the lever support pin 35. Is swingably supported.

  The holding lever 36 has a flange 36a that can be engaged with the engagement piece 14 at the tip, and an operation piece 37 is continuously provided downward from the flange 36a.

  The holding lever 36 is urged in the direction in which the flange 36 a engages with the engagement piece 14 by the spring 38 supported by the lever support pin 35, and the lever support 16 is engaged by the engagement of the flange 36 a and the engagement piece 14. Is held upright.

  The door A is provided with operating means 40 that pushes in the operating piece 37 by an operation from the inner surface side thereof and swings the holding lever 36 in the disengagement direction.

  In the case 43, the operating means 40 is slidably inserted into a through hole 41 provided in the door A, and a push button 42a provided on the head of the push rod 42 is attached to the inner surface of the door A. The push rod 42 is urged in a direction in which the push button 42a is pressed against the inward flange 45 provided in the opening of the case 43 by the return spring 44 incorporated in the case 43 so as to be slidable. By pushing the push button 42a, the tip of the operating piece 37 is pressed by the tip of the push rod 42, and the holding lever 36 is swung in the disengagement direction.

  As shown in FIG. 4, a lock unit 50 is attached to the lower portion of the lever support 16. The lock unit 50 has a key groove 51 shown in FIG. 2, and rotates the cylinder 52 by inserting and rotating the key into the key groove 51 to rotate the brake piece 53 attached to the end of the cylinder 52. By making the braking piece 53 face the lower end of the hook lever 24, the hook lever 24 can be locked in an upright state.

  The latch device shown in the embodiment has the above-described structure. When the door opening / closing handle 4 is swung around the lock shaft 1 to the lock position substantially parallel to the outer surface of the door A with the door A closed, Lock cams (not shown) provided at the upper and lower ends of the shaft 1 engage with the camshaft, and the door A is locked in the closed state.

  When the door opening / closing handle 4 is moved to the upper position of the hook lever 24 and is swung downward when the door A is locked, the door opening / closing handle 4 is tapered on the hook 28 of the hook lever 24. It contacts the surface 28a. When the door opening / closing handle 4 is further swung downward from the contact state, the tapered surface 28 a is pressed by the door opening / closing handle 4, so that the hook lever 24 falls down against the elasticity of the compression spring 34. Swing in the direction.

  When the door opening / closing handle 4 passes the position of the hook 28, the hook lever 24 swings toward the engagement position by the restoring elasticity of the compression spring 34, and the upper hook 28 opens and closes the door as shown in FIG. The door opening / closing handle 4 is supported by the protrusion 27 and is prevented from swinging in the vertical direction, and the door opening / closing handle 4 is locked.

  When the door A is released, the lower end of the hook lever 24 is pushed in, and the hook 28 is retracted from the upper side of the door opening / closing handle 4 by swinging the hook lever 24 around the pin 25 in the lying down direction. Then, the door opening / closing handle 4 is swung upward. Then, the door opening / closing handle 4 is swung around the lock shaft 1, and the engagement of the lock cam and the cam taper is released by the rotation of the lock shaft 1 due to the swing. The door A can be released by this disengagement.

  Here, when the hook lever 24 swings in the lying down direction, the pin 33 shown in FIG. 4 swings around the pin 25, and the pin 33 connects the upper edge of the inclined plate portion 31 and the center of the pin 25. When the pin 33 swings to a position exceeding the straight line, the urging direction in which the compression spring 34 presses the hook lever 24 is switched, and the hook lever 24 is urged in the prone direction by the compression spring 34.

  For this reason, even if the pressing of the hook lever 24 is released, the hook lever 24 is held in the prone state. Therefore, the door opening / closing handle 4 can be lifted while the hook lever 24 is not pressed, and the door opening / closing handle 4 can be easily swung upward.

  If the door opening / closing handle 4 is locked at the locked position in a state where the worker has entered the packing box and the worker is trapped in the packing box, the push button 42a shown in FIG. 5 is pushed in. To.

  When the push button 42a is pushed in, the push rod 42 moves in the axial direction and the operation piece 37 provided on the holding lever 36 is pressed, so that the holding lever 36 swings around the pin 35 and the engagement piece 14 The engagement of the flange portion 36a with respect to is released.

  When the push button 42 a of the push rod 42 is further pushed in the disengagement state of the holding lever 36, the lever support 16 swings in the prone direction around the pin 18.

  At this time, the hook lever 24 also falls down together with the lever support 16. FIG. 6 shows a state in which the lever support 16 and the hook lever 24 are in the overturned state, and the hook device 10 is unlocked by the overturning of the hook lever 24, and the holding of the door opening / closing handle 4 is released. Therefore, the door A can be released by pressing the door A from the packing box.

  Thus, by pushing the push button 42a to move the push rod 42 in the axial direction and pressing the operation piece 37 of the holding lever 36, the holding lever 36 can be reliably released and the push button 42a is pushed. Since the lever support body 16 is pushed in by the rod 42, the lever support body 16 can be surely laid down and the latching device 10 can be reliably unlocked from the inner surface side of the door A.

  Further, since the unlocking operation of the latching device 10 is one operation by pushing the push button 42a, a latching device with excellent operability can be obtained.

  In the embodiment, the operation lever 40 is shown as being swung in the disengagement direction by pushing the push rod 42 having the push button 42a as the operation member 40. However, the operation member 40 is limited to this. It is not a thing. For example, one end of the string may be faced to the inner surface side of the door A, and the holding lever 36 may be swung in the disengagement direction by an operation of pulling the string so that the latching device 10 can be unlocked.

The perspective view which shows embodiment of the latch apparatus which concerns on this invention 1 is an exploded perspective view showing a fixed seat plate and a lever support on which a hook lever is supported in the latch device shown in FIG. Rear view of the latching device shown in FIG. Sectional view along line IV-IV in FIG. Sectional drawing along the VV line of FIG. Side view showing unlocked state of latch device 1 is an exploded perspective view of the latching device shown in FIG.

Explanation of symbols

A Door 4 Door opening / closing handle 11 Fixed seat 12 Side wall 14 Engagement piece 16 Lever support 23 Fork piece 24 Hook lever 28 Hook 28a Tapered surface 34 Compression spring 36 Holding lever 37 Operation piece 38 Spring 40 Operation means 42 Push rod 44 Return spring

Claims (3)

A fixed seat plate attached to the door end of the door and provided with a pair of opposing side walls on both sides of the surface, a undulating lever support having a lower end supported by the pair of side walls, and a lever support thereof A hook lever that pivotally supports a central portion in the length direction by a bifurcated piece formed on the upper portion of the body, and prevents the door opening / closing handle from swinging upward by a hook formed on the upper portion; and the hook Of the lever support by engagement with a spring that urges the hook lever in a direction to engage with the door opening / closing handle, and a swinging support that is supported by the lever support and provided on the fixed seat plate. A holding lever that prevents swinging in the overlying direction, a spring that urges the holding lever in the engaging direction, and an operating means that swings the holding lever in the disengagement direction by operation from the inner surface of the door Ri consists of and, The operating means is provided with a push rod that penetrates the door freely so that the tip is opposed to the operating piece connected to the swing side end of the holding lever, and the push rod is separated from the operating piece by the return spring. A latch device for a door opening / closing handle configured to be biased in the direction . The spring for urging the hook lever in the engagement direction is formed of a compression spring, and the compression spring is provided so that the urging direction can be switched during the swinging of the hook lever in the engagement release direction. Latching device for the door opening / closing handle. The door opening and closing device according to claim 1 or 2, wherein a taper surface is provided on the upper side of the hook lever so as to swing the hook lever in the lying down direction by contact with a door opening and closing handle that is swung in the lying down direction . Handle latching device.

Images