JP3233811U - Fluid control valve for driving tools that does not require distance adjustment during assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid control valve for a driving tool which eliminates gas leakage when operating a driving tool due to an assembly error and which does not require adjustment of a separation distance at the time of assembly.
SOLUTION: This is a fluid control valve for a driving tool that does not require adjustment of a separation distance at the time of assembly, and has a fixing sleeve 21 including an insertion hole 220 and four communication holes 221 to 224, and front and rear of the fixing sleeve 21. A movable member 23 that is inserted into the insertion hole 220 so as to be movable in the direction and has an initial position and an operating position, is arranged between the fixed sleeve 21 and the movable member 23, and the movable member 23 is urged forward. A spring member 25 and a drive rod 27 that are abutted and arranged on the front side of the movable member 23 are provided.
[Selection diagram] Fig. 2

Description

The present invention relates to a pneumatic driving tool, and more particularly to a fluid control valve of a driving tool that does not require adjustment of a separation distance at the time of assembly.

As shown in FIGS. 7 and 8, the control valve assembly 80 is installed in the fluid passage of the tool body 91 of the conventional pneumatic driving tool, and the control valve assembly 80 includes the front fixing member 81 and the front fixing member 81. The rear fixing member 82, the movable member 83, the drive rod 835, and the spring member 84 are provided, and the front fixing member 81 and the rear fixing member 82 are installed at a constant distance in the front-rear direction and are movable members. The 83 is arranged between the front fixing member 81 and the rear fixing member 82, has airtight members 823 and 833 at the front end and the rear end of the movable member 83, respectively, and the drive rod 835 is connected to the movable member 83. At the same time, it is pressed by the operation of the switch lever 96 of the tool body 91, and the spring member 84 is installed in the rear fixing member 82 and urges the movable member 83 forward.

As shown in FIG. 7, before operating the switch lever 96, the movable member 83 is pressed forward by the urging force of the spring member 84, and the movable member 83 is pressed forward by the airtight member 832 on the front side of the movable member 83. , There is no gap between the front fixing member 81 and the movable member 83. On the other hand, when the gap between the movable member 83 and the rear fixing member 82 is opened, the compressed air introduced into the tool body 91 enters the piston chamber 92 from the rear end of the piston chamber 92 of the tool body 91. And pushes the piston 93 forward.

As shown in FIG. 8, when the switch lever 96 is pulled, the drive rod 835 is pressed backward and the movable member 83 is interlocked and retracted. Then, the gap between the movable member 83 and the front fixing member 81 is opened, and the airtight member 833 on the rear side of the movable member 83 eliminates the gap between the rear fixing member 82 and the movable member 83. The path of the fluid passage of the main body 91 is switched, and the compressed air introduced into the tool main body 91 enters the piston chamber 92 from the front end of the piston chamber 92 and presses the piston 93 rearward. Along with this, the push rod assembly 94 of the tool body 91 is retracted, the jaw assembly 95 is closed, and the C-shaped ring loaded in the jaw assembly 95 is bundled in a loop.

However, when assembling the control valve assembly 80, if the separation distance between the front fixing member 81 and the rear fixing member 82 attached to the tool body 91 is too large, the front fixing member 81 and the rear fixing member 82 will be separated from each other. The movable member 83 that reciprocates between the movable members 83 cannot move to a position where the gap between the airtight member 833 on the rear side of the movable member 83 and the rear fixing member 82 is completely closed, and the compressed air leaks. The problem occurs. In order to prevent this, after the assembly of the control valve assembly 80 is completed, it is necessary to readjust and readjust the separation distance between the front fixing member 81 and the rear fixing member 82, which causes a problem that it takes time and effort. There was a point.

The present invention has been made in view of the drawbacks of the prior art, and is a fluid control valve for a driving tool that does not require separation distance adjustment during assembly, which solves the problem of gas leakage when operating the driving tool due to an assembly error. Is intended to provide.

In order to achieve the above object, the present invention is a fluid control valve for a driving tool, which is installed in the fluid passage of the driving tool body and does not require adjustment of the separation distance at the time of assembly, and includes a fixed sleeve, a movable member, and the like. A spring member and a drive rod are provided, and the fixing sleeve is fixed in the fluid passage of the driving tool main body, and has an insertion hole, a first communication hole portion, a second communication hole portion, and a second. It has a three communication hole portion, a fourth communication hole portion, a first convex portion, a second convex portion, a third convex portion, and a fourth convex portion, and the first communication hole portion and the second communication hole portion. The communication hole portion, the third communication hole portion, and the fourth communication hole portion are arranged in order from the front to the back at intervals, and all communicate with the outer space of the fixing sleeve and the insertion hole. The first convex portion, the second convex portion, the third convex portion, and the fourth convex portion are arranged in order from the front to the back at intervals, and all of them protrude into the insertion hole. The first convex portion is located between the first communication hole portion and the second communication hole portion, and the second convex portion is the second communication hole portion and the third communication hole portion. The third convex portion is located between the communication hole portion and the communication hole portion, the third convex portion is located between the third communication hole portion and the fourth communication hole portion, and the fourth convex portion is the fourth communication hole portion. The movable member is inserted into the insertion hole of the fixed sleeve so as to be movable in the front-rear direction with respect to the fixed sleeve, and the first airtight portion and the second airtight portion are formed. The first airtight portion and the second airtight portion are arranged in order from the front to the back at intervals, and both are formed so as to protrude from the outer periphery of the movable member, and the movable member is formed. Has an initial position and an operating position, the spring member is arranged between the fixed sleeve and the movable member, the movable member is urged forward, and the drive rod is the movable. When the movable member is inserted into the insertion hole of the fixing sleeve so as to be abutted on the front side of the member and the movable member is in the initial position, the movable member and the movable member and the movable member are provided by the first airtight portion. When the gap between the first convex portion is shielded and the gap between the movable member and the third convex portion is shielded by the second airtight portion, and the movable member is in the operating position. The first airtight portion shields the gap between the movable member and the second convex portion, and the second airtight portion betweens the movable member and the fourth convex portion. The flow system of the driving tool that does not require the separation distance adjustment during assembly when the gap is shielded We provide your valve.

In the present invention, the insertion hole, the first communication hole portion, the second communication hole portion, the third communication hole portion, and the fourth communication hole portion are formed by the displacement of the movable member inserted in the insertion hole of the fixed sleeve. The communication path between the two is changed to control the switching of the fluid passage of the driving tool body. For example, when the movable member is in the initial position, the compressed air enters the piston chamber from the rear end of the piston chamber, while the compressed air enters the piston chamber. When the movable member is in the operating position, the compressed air is configured to enter the piston chamber from the front end of the piston chamber.

The movable member reciprocates in the insertion hole of the fixed sleeve to open or close the gap between the movable member and the fixed sleeve. Here, the initial position and the operating position of the movable member Since the moving distance between the two and the fixed sleeve corresponds to the separation distance between the first convex portion and the second convex portion of the fixed sleeve and the separation distance between the third convex portion and the fourth convex portion. , There is no error due to assembly, and when operating the driving tool, the movable member moved to the operating position can completely close the gap between the movable member and the second convex part and the fourth convex part. Since it can be done, the problem of gas leakage can be solved and the labor of adjustment work can be saved.

It is an exploded view which shows a part component in a preferable example of this invention. It is an exploded perspective view of the preferred embodiment of the present invention. In a preferred embodiment of the present invention, it is a side sectional view when the movable member is in the initial position. FIG. 5 is a side sectional view when the movable member is in the operating position in a preferred embodiment of the present invention. In a preferred embodiment of the present invention, it is a schematic diagram which shows the operation state when a movable member is in an initial position. In a preferred embodiment of the present invention, it is a schematic diagram which shows the operation state when a movable member is in an operating position. It is a schematic diagram which shows the operation state before pulling a switch lever in a conventional driving tool. It is a schematic diagram which shows the operation state when the switch lever is pulled in the conventional driving tool.

As shown in FIGS. 1, 5 and 6, the fluid control valve of the driving tool, which does not require the separation distance adjustment at the time of assembly according to the present invention, is installed in the fluid passage of the driving tool main body 10 and is installed. A piston chamber 12, a fluid passage, a piston 13, a push rod assembly 15, a jaw assembly 17, and a switch lever 19 are provided, the piston 13 is movably installed in the piston chamber 12, and the push rod assembly 15 is interlocked with the piston 13. At the same time as being connected, the jaw assembly 17 is driven to open and close, and the switch lever 19 presses the fluid control valve 20 by a pulling operation.

As shown in FIGS. 2 to 4, the fluid control valve 20 includes a fixed sleeve 21, a movable member 23, a spring member 25, and a moving rod 27.

The fixing sleeve 21 is fixed in the fluid passage of the driving tool main body 10, and also has an insertion hole 220, a first communication hole portion 221, a second communication hole portion 222, a third communication hole portion 223, and a second. It has a four communication hole portion 224, a first convex portion 216, a second convex portion 217, a third convex portion 218, and a fourth convex portion 219.

The first communication hole portion 221 and the second communication hole portion 222, the third communication hole portion 223, and the fourth communication hole portion 224 are arranged in order from the front to the back, and all of them are arranged in order from the front to the back, and the external space of the fixing sleeve 21 and the outer space of the fixing sleeve 21 and the fourth communication hole portion 224. It communicates with the insertion hole 220. Specifically, the first, second, third, and fourth communication holes 221, 222, 223, and 224 each have at least one communication hole that communicates with the external space of the fixed sleeve 21 and the insertion hole 220. However, in a preferred embodiment of the present invention, the first, second, third and fourth communication holes 221, 222, 223, 224 all have a plurality of communication holes arranged at regular intervals.

The first convex portion 216, the second convex portion 217, the third convex portion 218, and the fourth convex portion 219 are arranged in order from the front to the rear, and are all formed so as to project into the insertion hole 220. NS. The first convex portion 216 is located between the first communication hole portion 221 and the second communication hole portion 222, and the second convex portion 217 is between the second communication hole portion 222 and the third communication hole portion 223. The third convex portion 218 is located between the third communication hole portion 223 and the fourth communication hole portion 224, and the fourth convex portion 219 is located behind the fourth communication hole portion 224. It is composed of.

The movable member 23 is inserted into the insertion hole 220 of the fixed sleeve 21 so as to be movable in the front-rear direction with respect to the fixed sleeve 21, and has a first airtight portion 232 and a second airtight portion 233. The first airtight portion 232 and the second airtight portion 233 are arranged in order from the front to the rear, and both are formed so as to project from the outer periphery of the movable member 23.

Further, the movable member 23 has an initial position (see FIG. 3) and an operating position (see FIG. 4), and as shown in FIG. 3, the movable member 23 is in the initial position when it is in the initial position. The first airtight portion 232 shields the gap between the movable member 23 and the first convex portion 216, and the second airtight portion 233 shields the gap between the movable member 23 and the third convex portion 218. Will be done. As a result, the second communication hole portion 222 and the third communication hole portion 223 communicate with each other through the insertion hole 220, while the first communication hole portion 221 and the second communication hole portion 222, and the third communication hole portion 223 communicate with each other. The portion 223 and the fourth communication hole portion 224 do not communicate with each other.

As shown in FIG. 4, when the movable member 23 is in the operating position, the first airtight portion 232 shields the gap between the movable member 23 and the second convex portion 217 and is second airtight. The portion 233 shields the gap between the movable member 23 and the fourth convex portion 219. As a result, the third communication hole portion 223 and the fourth communication hole portion 224, and the first communication hole portion 221 and the second communication hole portion 222 of the fixed sleeve 21 communicate with each other through the insertion hole 220, while the first communication hole portion 223 and the second communication hole portion 222 communicate with each other. The two communication hole portions 222 and the third communication hole portion 223 are not in communication with each other.

As shown in FIGS. 2 to 4, the spring member 25 is arranged between the fixed sleeve 21 and the movable member 23, and the movable member 23 is urged forward, and the drive rod 27 is the movable member 23. The movable member 23 is interlocked and retracted by being inserted into the insertion hole 220 of the fixed sleeve 21 and being pushed backward by the pulling operation of the switch lever 19 so as to be arranged in contact with the front side of the.

Further, the fixed sleeve 21 has a front sleeve 211, a rear sleeve 212, and an end lid 213 so that the front end of the rear sleeve 212 abuts on the front sleeve 211 and the rear end abuts on the end lid 213. , Arranged between the front sleeve 211 and the end lid 213. The insertion hole 220 extends from the front sleeve 211 to the rear sleeve 212, and the first communication hole portion 221 is formed on the front sleeve 211, and the second, third, and fourth communication hole portions 222, 223, 224 and The first, second, third, and fourth convex portions 216, 217, 218, and 219 are all formed on the rear sleeve 212.

The movable member 23 has a central hole 235, a front movable communication hole portion 234, and a rear movable communication hole portion 236. The center hole 235 penetrates from the front end to the rear end of the movable member 23, and both the front movable communication hole portion 234 and the rear movable communication hole portion 235 communicate with the center hole 235 and the insertion hole 220 of the fixed sleeve 21. The front movable communication hole portion 234 is located on the front side of the first airtight portion 232, and the rear movable communication hole portion 236 is located on the rear side of the second airtight portion 233.
The drive rod 27 is inserted into the central hole 235 of the movable member 23, has a blind hole 272 and a drive communication hole portion 274, and the blind hole 272 extends from the rear end of the drive rod 27 to the front. At the same time, it communicates with the central hole 235 of the movable member 23, and the drive communication hole portion 274 communicates with the blind hole 272 and the front movable communication hole portion 234 of the movable member 23.

When the movable member 23 is in the initial position, it is preferable that the front end of the movable member 23 comes into contact with the rear end of the front sleeve 211.

As shown in FIGS. 1, 5 and 6, the fluid passages of the driving tool main body 10 include an air supply flow path 141, an exhaust flow path 142, a first flow path 143, a second flow path 144, and a control valve accommodating chamber. It has 145. The fluid control valve 20 is housed in the control valve accommodating chamber 145, and one end of the air supply flow path 141, one end of the exhaust flow path 142, one end of the first flow path 143, and one end of the second flow path 144 are controlled, respectively. The other end of the first flow path 143 is connected so as to communicate with the front end of the piston chamber 12, and the other end of the second flow path 144 is connected so as to communicate with the valve accommodating chamber 145. It is connected so as to communicate with the rear end, the first communication hole portion 221 is connected so as to communicate with the exhaust flow path 142, and the second communication hole portion 222 is connected so as to communicate with the second flow path 144. , The third communication hole portion 223 is connected so as to communicate with the air supply flow path 141, and the fourth communication hole portion 224 is connected so as to communicate with the first flow path 143.

As shown in FIGS. 3 and 5, in the stage before the operation of the switch lever 19, the movable member 23 is urged by the spring member 25 and held in the initial position. At this time, the movable member 23 is held. The first airtight portion 232 closes the gap between the movable member 23 and the first convex portion 216, and the second airtight portion 233 closes the gap between the movable member 23 and the third convex portion 218. Then, the second communication hole portion 222 and the third communication hole portion 223 of the fixed sleeve 21 are in a state of communicating with each other through the insertion hole 220, while the first communication hole portion 221 and the second communication hole portion 222, and the second communication hole portion 222, and The third communication hole portion 223 and the fourth communication hole portion 224 are in a state of not communicating with each other.

At this time, the compressed air enters from the air supply flow path 141, enters the insertion hole 220 through the third communication hole portion 223 of the fixed sleeve 21, and then enters the second communication flow path 144 from the second communication hole portion 222. It flows, and finally, it enters the piston chamber 12 from the rear end of the piston chamber 12 and presses the piston 13 forward.

Then, the air on the front side of the piston 13 in the piston chamber 12 flows through the first flow path 143 from the fourth communication hole portion 224 of the fixed sleeve 21 to the rear movable communication hole portion 236 of the movable member 23. After that, it flows through the central hole 235 of the movable member 23 to the blind hole 272 of the drive rod 27, and further passes through the drive communication hole portion 274, the insertion hole 220, and the first communication hole portion 221 and then the exhaust flow path 142. It flows to and is discharged.

As shown in FIGS. 4 and 6, when the switch lever 19 is pulled, the drive rod 27 is pushed backward, and the movable member 23 interlocks with the switch lever 19 to move backward and move to the operating position. Then, the first airtight portion 232 of the movable member 23 closes the gap between the movable member 23 and the second convex portion 217, and the second airtight portion 233 connects the movable member 23 and the third convex portion 218. The gap between them is closed, so that the third communication hole portion 223 and the fourth communication hole portion 224 of the fixing sleeve 21 communicate with each other through the insertion hole 220, and also with the first communication hole portion 221. The second communication hole portion 222 is in a state of communicating with the insertion hole 220, while the second communication hole portion 222 and the third communication hole portion 223 are in a state of not communicating with each other.

At this time, the compressed air enters from the air supply flow path 141, enters the insertion hole 220 through the third communication hole portion 223 of the fixed sleeve 21, and then enters the first communication flow path 143 from the fourth communication hole portion 224. It flows, and finally, it enters the piston chamber 12 from the front end of the piston chamber 12 and presses the piston 13 rearward.

The air on the rear side of the piston 13 in the piston chamber 12 enters the insertion hole 220 from the second communication hole portion 222 of the fixed sleeve 21 through the second flow path 144, and the front movable communication hole portion of the movable member 23. It flows through 234 and the central hole 235 to the section where the front sleeve 211 is arranged in the insertion hole 220, and then flows through the first communication hole portion 221 to the exhaust flow path 142 and is discharged.

The movable member 23 reciprocates in the insertion hole 220 of the fixed sleeve 21 to open or close the gap between the movable member 23 and the fixed sleeve 21. Here, the movable member 23 The moving distance between the initial position and the operating position of the fixed sleeve 21 is the separation distance between the first convex portion 216 and the second convex portion 217 of the fixed sleeve 21, and the distance between the third convex portion 218 and the fourth convex portion 219. Since it corresponds to the separation distance between them, there is no error due to assembly, and when operating the driving tool, the movable member 23 that has moved to the operating position is the movable member 23 and the second convex portion 217 and the fourth. Since the gap between the convex portion 219 and the convex portion 219 can be completely closed, the problem of gas leakage can be solved and the labor of adjustment work can be saved.

10 Driving tool body 12 Piston chamber 13 Piston 141 Air supply flow path 142 Exhaust flow path 143 First flow path 144 Second flow path 145 Control valve storage chamber 15 Push rod assembly 17 Jaw assembly 19 Switch lever 20 Fluid control valve 21 Fixed sleeve 211 Front sleeve 212 Rear sleeve 213 End lid 216 1st convex part 217 2nd convex part 218 3rd convex part 219 4th convex part 220 Insertion hole 221 1st communication hole 222 2nd communication hole 223 3rd communication hole 224 4th communication hole 23 Movable member 232 1st airtight part 233 2nd airtight part 234 Front movable communication hole 235 Center hole 236 Rear movable communication hole 25 Spring member 27 Drive rod 272 Blind hole 274 Drive communication hole

Claims (5)

A fluid control valve for a driving tool that is installed in the fluid passage of the driving tool body and does not require adjustment of the separation distance during assembly.
A fixed sleeve, a movable member, a spring member, and a drive rod are provided.
The fixing sleeve is fixed in the fluid passage of the driving tool main body, and has an insertion hole, a first communication hole portion, a second communication hole portion, a third communication hole portion, and a fourth communication hole. It has a portion, a first convex portion, a second convex portion, a third convex portion, and a fourth convex portion, and has the first communication hole portion, the second communication hole portion, and the third communication hole portion. And the fourth communication hole portion is arranged in order from the front to the back at intervals, and each communicates with the outer space of the fixing sleeve and the insertion hole, and the first convex portion and the second communication hole portion. The convex portion, the third convex portion, and the fourth convex portion are arranged in order from the front to the back at intervals, and all of them are formed so as to project into the insertion hole, and the first convex portion is formed. The portion is located between the first communication hole portion and the second communication hole portion, and the second convex portion is located between the second communication hole portion and the third communication hole portion. The third convex portion is located between the third communication hole portion and the fourth communication hole portion, and the fourth convex portion is located on the rear side of the fourth communication hole portion.
The movable member is inserted into the insertion hole of the fixed sleeve so as to be movable in the front-rear direction with respect to the fixed sleeve, and has a first airtight portion and a second airtight portion. The airtight portion and the second airtight portion are arranged in order from the front to the rear at intervals, and both are formed so as to project from the outer periphery of the movable member, and the movable member is in an initial position and an operating position. And have
The spring member is arranged between the fixed sleeve and the movable member, and the movable member is urged forward.
The drive rod is inserted into the insertion hole of the fixing sleeve so as to be abutted and arranged on the front side of the movable member.
When the movable member is in the initial position, the first airtight portion shields the gap between the movable member and the first convex portion, and the second airtight portion shields the movable member. The gap between the and the third convex portion is shielded,
When the movable member is in the operating position, the first airtight portion shields the gap between the movable member and the second convex portion, and the second airtight portion shields the movable member. A fluid control valve for a driving tool that does not require adjustment of the separation distance during assembly so that the gap between the surface and the fourth convex portion is shielded. With the front sleeve, the fixing sleeve has a front sleeve, a rear sleeve, and an end lid so that the front end of the rear sleeve abuts the front sleeve and the rear end abuts the end lid. It is placed between the end lid and
The insertion hole extends from the front sleeve to the rear sleeve.
The first communication hole is formed on the front sleeve.
The second communication hole portion, the third communication hole portion, the fourth communication hole portion, the first convex portion, the second convex portion, the third convex portion and the fourth convex portion are all the rear sleeve. The fluid control valve for a driving tool formed above, which does not require adjustment of the separation distance at the time of assembly according to claim 1. The movable member has a central hole, a front movable communication hole portion, and a rear movable communication hole portion, and the center hole penetrates from the front end to the rear end of the movable member, and the front movable communication hole portion and the rear movable communication hole portion and the movable member. The rear movable communication hole portion communicates with the central hole and the insertion hole of the fixed sleeve, and the front movable communication hole portion is located on the front side of the first airtight portion, and the rear movable communication hole portion is located on the front side of the first airtight portion. The hole is a fluid control valve for a driving tool that is located on the rear side of the second airtight portion and does not require adjustment of the separation distance at the time of assembly according to claim 2. The drive rod is inserted into the central hole of the movable member and has a blind hole and a drive communication hole portion, and the blind hole extends from the rear end of the drive rod to the front. At the time of assembly according to claim 3, the separation distance is adjusted so that the movable communication member communicates with the central hole of the movable member and the drive communication hole portion communicates with the blind hole and the front movable communication hole portion of the movable member. A fluid control valve for driving tools that does not require. When the movable member is in the initial position, the front end of the movable member does not need to adjust the separation distance at the time of assembly according to any one of claims 2 to 4, wherein the front end of the movable member abuts on the rear end of the front sleeve. Fluid control valve for driving tools.

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