JP4070028B2 - Silencer structure in latch device - Google Patents

Description

In the present invention, the latch bolt pulled by the drive unit of the lock device separately provided on the door is engaged with the receiving part on the fixed frame body side by the biasing force of the compression coil spring, thereby holding the door in a closed state. The present invention relates to a silencing structure in the latch device.

In the latch device, when the latch bolt reaches the advance position where it engages with the receiving portion, the stopper portion formed on a part of the latch bolt or the stopper body attached to the latch bolt collides with the guide plate portion of the latch bolt holder. This stops at the forward position. However, since the stopper portion, the stopper body and the guide plate portion are made of a hard metal material, a sound is generated at the time of collision.

As a measure to reduce the collision sound when this lock is established, on the back side of the latch front of the lock case,
To be inclined with respect to the direction from the back side of the latch front toward the stopper part,
A plate spring made by bending a part of a metal spring plate is provided, and when the latch bolt protrudes from the opening of the latch front, the stopper part comes into contact with the tip of the spring plate. A silencing structure has been proposed (see Patent Document 1).

However, in this silencer structure, the spring plate material is elastically deformed at the time of contact with the stopper portion, so there is no doubt that the collision load of the stopper against the latch front is absorbed. It is impossible to avoid the occurrence of an impulsive sound at the beginning of contact between the plate material and the stopper portion.
Further, since the spring plate material is sandwiched between the latch front and the front liner which are fastened and fixed to the door by a plurality of screws, when the spring plate material is deteriorated and replaced, the latch front and front liner are removed from the door. It must be removed, and the series of replacement work is complicated.

A material using a rubber material instead of a metal spring plate material as a buffer member has already been proposed. For example, the latch includes a latch slidably provided by rotation of a knob provided on the door, and a latch receiving recess provided on the door frame. The latch has a tip portion located in the recess. In the latch device biased by the spring as described above, at least a portion of the recess that comes into contact with the latch is coated or coated with a rubber material (Patent Document 2).

However, in this silencing structure, since the cushioning rubber material is applied to the concave portion by coating or coating, when the rubber material is deteriorated, the metal fitting having the concave portion must be removed from the door frame. Rather, a series of replacement work is complicated.

JP 2002-242492 A Japanese Utility Model Publication No. 5-75363

The problem of the present invention is that it is possible to reduce the generation of the collision sound when locking is established to the limit,
It is an object of the present invention to provide a silencer structure in a latch device that can be easily replaced and replaced when a buffer member is deteriorated.

The main feature of the silencing structure of the invention of claim 1 is that it includes a front guide plate portion and a rear guide plate portion arranged in parallel to each other toward the receiving portion on the fixed frame body side, and is fixed to the rear surface of the door. a latch bolt holder, and a latch bolt which is fitted into the front guide plate portion of the guide hole and the guide hole of the rear guide plate portion, the tip portion of the latch bolt is engaged with the receiving portion of the fixed frame side consists to the forward position and the compression coil spring that moves urging the latch bolt, the latch bolt, the unlocking operation of the locking device which is separately installed in the door, the tip portion of the latch bolt of the fixed frame side In the latch device to be pulled to the retracted position to be separated from the receiving part
A spring receiving plate is detachably fitted to the latch bolt, and a retaining spring pin inserted into a fixing hole in an intermediate portion of the latch bolt is brought into contact with the front surface of the spring plate, and the rear guide plate portion The compression coil spring is fitted to the latch bolt between the spring receiving plate and the spring receiving plate, the compression coil spring is compressed between the front surface of the rear guide plate portion and the rear surface of the spring receiving plate, and the retaining spring In a forward position where a buffer rubber body is detachably fitted to the latch bolt between a spring pin and the front guide plate portion, and a leading end portion of the latch bolt engages with a receiving portion on the fixed frame side, The rear surface of the shock-absorbing rubber body is pushed by the retaining spring pin so that the front surface of the shock-absorbing rubber body is brought into contact with the rear surface of the front guide plate portion .

The main feature of the sound deadening structure of the invention of claim 2 includes a front guide plate portion and a rear guide plate portion arranged in parallel to each other toward the receiving portion on the fixed frame body side, and is fixed to the rear surface of the door. a latch bolt holder, and a latch bolt which is fitted into the front guide plate portion of the guide hole and the guide hole of the rear guide plate portion, the tip portion of the latch bolt is engaged with the receiving portion of the fixed frame side consists to the forward position and the compression coil spring that moves urging the latch bolt, the latch bolt, the unlocking operation of the locking device which is separately installed in the door, the tip portion of the latch bolt of the fixed frame side In the latch device to be pulled to the retracted position to be separated from the receiving part
A spring receiving plate is detachably fitted to the latch bolt, and a retaining spring pin inserted into a fixing hole in an intermediate portion of the latch bolt is brought into contact with the front surface of the spring plate, and the rear guide plate portion The compression coil spring is fitted to the latch bolt between the spring receiving plate and the spring receiving plate, the compression coil spring is compressed between the front surface of the rear guide plate portion and the rear surface of the spring receiving plate, and the spring receiving plate. A plurality of shock-absorbing rubber bodies are detachably fitted to the front surface side of the spring, and the rear surface of the spring receiving plate is compressed in the forward position where the front end portion of the latch bolt engages the receiving portion on the fixed frame body side. This is because the front surface of the cushioning rubber body is brought into contact with the rear surface of the front guide plate portion by pressing with a coil spring .

In the silencing structure according to the first aspect of the present invention, since the front surface of the cushioning rubber body fitted to the latch bolt comes into contact with the rear surface of the front guide plate portion, it is possible to absorb or reduce the collision sound generated when locking is established to the limit. .
Also, by simply removing a single spring pin for retaining from the fixing hole of the latch bolt, the latch bolt is removed from the guide hole of the front guide plate and the guide hole of the rear guide plate , and the cushion rubber body is removed from the latch bolt. Since it can be extracted and replaced with a new one, the cushioning rubber body can be replaced easily.

In the silencing structure of the invention of claim 2, since the front surface of the shock-absorbing rubber body fitted and attached to the front surface side of the spring receiving plate abuts against the rear surface of the front guide plate portion, the impact sound generated when locking is established is absorbed to the limit. Can be killed.
Also, by simply removing a single spring pin for retaining from the fixing hole of the latch bolt, the latch bolt is removed from the guide hole of the front guide plate and the guide hole of the rear guide plate , and the spring receiving plate is removed from the latch bolt. Since the cushioning rubber body can be removed, the operation of removing the cushioning rubber body from the fitting portion of the spring plate and replacing it with a new one can be performed smoothly, and the cushioning rubber body can be easily replaced.

The embodiment shown in FIGS. 1 to 3 relates to the invention of claim 1, and the latch holder 1 formed into a U shape by pressing a metal plate is fixed to the back surface of the door 2 by welding, for example. ing. The front guide plate portion 3 and the rear guide plate portion 4 are arranged at right angles to the back surface of the door 2, and the latch bolts 7 made of metal rods inserted into the guide holes 5 and 6 penetrating in the front-rear direction are Slide back and forth in parallel with the back of 2.
At the base end portion of the latch bolt 7, a connection fitting 9 provided at the end of the pulling member 8 such as a wire or a rod is screwed. The other end of the traction member 8 is interlocked with a locking mechanism of a lock device (not shown) separately provided on the door 2, and when the lock device is operated in the unlocking direction , the traction member 8 is shown in FIG. 1 is pulled to the right.

The receiving portion 11 of the fixed frame body 10 is configured by a through hole formed in the inner surface panel 12 of the fixed frame body 10. A metal guide tube 13 for further stabilizing the directionality of the forward and backward movement of the latch bolt 7 is welded to the side closer to the receiving portion 11, that is, the front surface of the front guide plate portion 3. A metal circular spring receiving plate 14 is detachably fitted to the latch bolt 7 in the central through hole 15. The fixing hole 16 is formed across the diameter direction of the latch bolt 7, and a split pin type spring pin 17 for retaining is inserted.

The spring receiving plate 14 is prevented from moving in the direction of the front guide plate portion 3 by a retaining spring pin 17. A metal compression coil spring 1 fitted to the latch bolt 7 in a direction farther than the receiving portion 11 of the fixed frame 10, that is, between the rear guide plate portion 4 and the spring receiving plate 14.
8 is moving biases the latch bolt 7 to the left in the forward direction, i.e., Fig. 1 the tip portion of the latch bolt 7 engages the receiving portion 11.

The buffer rubber body 19 is formed in a circular ring grommet shape, and is closely fitted to the latch bolt 7 in the central opening 19a. Examples of the rubber material include SBR, CR, NBR,
Synthetic rubbers such as CSM (chlorosulfonated polyethylene), EPDM, urethane, and a mixture of NBR and PVC are used, but are not particularly limited.
When the locking device is operated to the locking position and the pulling of the latch bolt 7 by the pulling member 8 is released, the latch bolt 7 is advanced by the urging of the compression coil spring 18, and the tip of the latch bolt 7 is fixed. Engage with the receiving part 11 of the frame 10. When this lock is established, the front surface of the cushioning rubber body 19 comes into contact with the rear surface of the front guide plate portion 3 and is compressed between the front guide plate portion 3 and the retaining spring pin 17 to perform a required buffering and silencing action. .

The embodiment shown in FIGS. 4 to 6 relates to the invention of claim 2, and the latch holder 1 formed into a U shape by pressing a metal plate is fixed to the back surface of the door 2 by welding, for example. ing. The front guide plate portion 3 and the rear guide plate portion 4 are arranged at right angles to the back surface of the door 2, and the latch bolts 7 made of metal rods inserted into the guide holes 5 and 6 penetrating in the front-rear direction are Slide back and forth in parallel with the back of 2.
A connection fitting 9 of a pulling member 8 such as a wire or a rod is screwed into the base end portion of the latch bolt 7. The other end of the traction member 8 is a lock device (not shown) separately provided on the door 2.
When the locking device is operated in the unlocking direction , the pulling member 8 is pulled in the right direction in FIG.

The receiving portion 11 of the fixed frame body 10 is configured by a through hole formed in the inner surface panel 12 of the fixed frame body 10. The metal large-diameter spring receiving plate 20 is detachably fitted to the latch bolt 7 in the central through hole 21. The spring receiving plate 20 is formed with a pair of attachment holes 22 on both sides of the central through hole 21. In each mounting hole 22, a leg portion of a hook-shaped shock-absorbing rubber body 23 disposed on the front side of the spring receiving plate 20 is closely fitted so as to be removable. The leg portion is formed in a shape having a non-return action, and the buffer rubber body 23 is not easily detached from the spring receiving plate 20. The fixing hole 16 is formed across the diameter direction of the latch bolt 7, and a split pin type spring pin 17 for retaining is inserted.

The spring receiving plate 20 is prevented from moving in the direction of the front guide plate portion 3 by the retaining spring pin 17. The metal compression coil spring 18 fitted to the latch bolt 7 between the fixed frame 10 farther than the receiving portion 11, that is, between the rear guide plate portion 4 and the spring receiving plate 20, It is urged to move in the forward direction that engages with the receiving portion 11, that is , in the left direction in FIG.

As the material of the two buffer rubber bodies 23, for example, synthetic rubber such as SBR, CR, NBR, CSM (chlorosulfonated polyethylene), EPDM, urethane, a mixture of NBR and PVC is used, but is particularly limited. It is not something.
When the locking device is operated to the locking position and the pulling of the latch bolt 7 by the pulling member 8 is released, the latch bolt 7 and the spring plate 20 are moved forward by the urging of the compression coil spring 18, and the latch bolt 7 The leading end engages with the receiving part 11 of the fixed frame 10. When this lock is established, the front surface of the head of each buffer rubber body 23 comes into contact with the rear surface of the front guide plate portion 3 and is compressed between the guide plate portion 3 and the retaining spring pin 17 so as to provide the required buffer and noise reduction. Perform the action.
In this embodiment, since the collision load is distributed to a plurality of buffer rubber bodies 23 provided side by side, there is little or no sound generated due to the contact between each buffer rubber body 23 and the front guide plate portion 3. The noise reduction effect is improved.

It is a top view of the latch apparatus provided with the sound deadening structure concerning one example of the present invention, and a door is in a closed locking state. It is a left view of the latch apparatus of FIG. It is a bottom view of the latch device of FIG. It is a top view of the latch apparatus provided with the sound deadening structure concerning another example of the present invention, and a door is in a closed locking state. It is a left view of the latch apparatus of FIG. FIG. 5 is a rear view of the latch device of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latch holder 2 Door 3 Front side guide plate part 4 Rear side guide plate part 5 Guide hole 6 Guide hole 7 Latch bolt 8 Pulling member 9 Connecting metal fitting 10 Fixing frame 11 Receiving part 12 Inner panel 13 Guide plate part 14 Spring receiving plate 15 Central through hole 16 Fixing hole 17 Spring pin 18 for retaining spring Compression spring 19 Buffer rubber body 20 Spring receiving plate 21 Central through hole 22 Mounting hole 23 Buffer rubber body

Claims (2)

A front guide plate portion and a rear guide plate portion arranged in parallel to each other toward the receiving portion on the fixed frame body side, a latch bolt holder fixed to the back of the door, and a guide hole of the front guide plate portion and a latch bolt which is fitted into the guide hole of the rear guide plate, compressing the tip of the latch bolt moves urging the latch bolt into the advanced position to engage the receiving portion of the fixed frame side A latch device comprising a coil spring , wherein the latch bolt is pulled to a retracted position in which the tip of the latch bolt is detached from the receiving portion on the fixed frame body side by an unlocking operation of a lock device separately provided on the door In
A spring receiving plate is detachably fitted to the latch bolt, and a retaining spring pin inserted into a fixing hole in an intermediate portion of the latch bolt is brought into contact with the front surface of the spring plate, and the rear guide plate portion The compression coil spring is fitted to the latch bolt between the spring receiving plate and the spring receiving plate, the compression coil spring is compressed between the front surface of the rear guide plate portion and the rear surface of the spring receiving plate, and the retaining spring In a forward position where a buffer rubber body is detachably fitted to the latch bolt between a spring pin and the front guide plate portion, and a leading end portion of the latch bolt engages with a receiving portion on the fixed frame side, press rear surface of the rubber buffer body spring pin for the retaining, erasing of the latch device, wherein a front surface of the cushion rubber member was so as to abuts on the rear surface of the front guide plate portion Structure. A front guide plate portion and a rear guide plate portion arranged in parallel to each other toward the receiving portion on the fixed frame body side, a latch bolt holder fixed to the back of the door, and a guide hole of the front guide plate portion and a latch bolt which is fitted into the guide hole of the rear guide plate, compressing the tip of the latch bolt moves urging the latch bolt into the advanced position to engage the receiving portion of the fixed frame side A latch device comprising a coil spring , wherein the latch bolt is pulled to a retracted position in which the tip of the latch bolt is detached from the receiving portion on the fixed frame body side by an unlocking operation of a lock device separately provided on the door In
A spring receiving plate is detachably fitted to the latch bolt, and a retaining spring pin inserted into a fixing hole in an intermediate portion of the latch bolt is brought into contact with the front surface of the spring plate, and the rear guide plate portion The compression coil spring is fitted to the latch bolt between the spring receiving plate and the spring receiving plate, the compression coil spring is compressed between the front surface of the rear guide plate portion and the rear surface of the spring receiving plate, and the spring receiving plate A plurality of shock-absorbing rubber bodies are detachably fitted to the front surface side of the spring, and the rear surface of the spring receiving plate is compressed in the forward position where the front end portion of the latch bolt engages the receiving portion on the fixed frame body side. A silencer structure in a latch device, wherein the sound absorbing rubber body is pressed by a coil spring so that the front surface of the buffer rubber body comes into contact with the rear surface of the front guide plate portion .

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