JP2020084990A - Cord bushing - Google Patents

Abstract

To provide a cord bushing which is available for walls of various thicknesses by reducing a clearance.SOLUTION: A cord bushing comprises: an outer cylinder including first contact means in contact with one wall surface; and an inner cylinder which includes second contact means in contact with the other wall surface and is inserted into the outer cylinder. The outer cylinder includes multiple pieces of first fixing means, and the inner cylinder includes multiple pieces of second fixing means each of which is fixed while being paired with one of the first fixing means. The first fixing means and the second fixing means are disposed in such a manner that, in a case where at least a pair of the first fixing means and the second fixing means is fixed, the second fixing means and the non-fixed the first fixing means exist and in the non-fixed first fixing means, at least one piece of the non-fixed first fixing means in which a distance from the non-fixed first fixing means to the second fixing means at the side of the second contact means which can be fixed with the first fixing means is shorter than a distance from the fixed first fixing means to the second fixing means at the side of the second contact means which can be fixed with the first fixing means exists.SELECTED DRAWING: Figure 5

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord bushing that is attached to a hole formed in a wall in a tubular shape, passes the cord through the barrel, and pulls the cord from one surface of the wall to the other surface.

When pulling the cord from one side of the wall to the other side, install a tubular cord bushing in the through hole to prevent the cord from being damaged by the through hole provided in the wall. Passing the code is done. Some cord bushings include an inner cylinder and an outer cylinder. The inner cylinder is configured to be insertable into the through hole. The inner cylinder is configured so that it penetrates through the wall, and the tip thereof penetrates from the surface opposite to the wall surface into which the inner cylinder is inserted. Then, the outer cylinder is configured to be attached to the inner cylinder having the tip penetrating from the wall surface from the surface opposite to the wall surface into which the inner cylinder is inserted. Further, the cord bushing is configured such that the wall is sandwiched between the inner cylinder and the outer cylinder. Since the thickness of the wall in which such a cord bushing is used varies, there is a demand for a cord bushing that can handle any wall thickness. A wall penetrating sleeve described in Patent Document 1, for example, is known as a tube that can protect a cord by penetrating a wall having various thicknesses.

The wall penetrating sleeve described in Patent Document 1 is composed of an inner cylinder having a plurality of engaged recesses and an outer cylinder having an engaging protrusion attached to the inner cylinder. The engaged recesses are formed along the circumference of the inner cylinder, and a plurality of engaged recesses are provided at positions different in distance from one end of the inner cylinder. The engagement protrusion is configured to engage in stages with the engaged recesses having different distances from one end of the inner cylinder. Accordingly, the combination of the engaging convex portion and the engaged concave portion to be engaged is changed stepwise, so that the relative positions of the outer cylinder and the inner cylinder can be changed stepwise. That is, such a wall penetrating sleeve can be adapted to various wall thicknesses by adjusting the distance from the tip of the inner cylinder, which is opposite to the tip inserted into the outer cylinder, to the outer cylinder. Is possible.

JP, 2010-127321, A

However, in the wall penetrating sleeve described in Patent Document 1, the relative positions of the outer cylinder and the inner cylinder are determined by the intervals at which the engaged recesses are provided. Therefore, the length of the distance from the tip of the inner tube opposite to the tip inserted into the outer tube to the outer tube does not always match the wall thickness. That is, when attempting to sandwich the wall between the one end side of the outer cylinder and the one end side of the inner cylinder of the wall penetrating sleeve described in Patent Document 1, a gap is generated between the outer cylinder and the wall and between the wall and the inner cylinder. There was a problem that it might end up.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cord bushing that can hold a wall by reducing the gap regardless of the thickness of the wall.

In order to achieve this object, the cord bushing according to claim 1 is attached in a cylindrical shape to a hole provided in a wall, and a cord is passed through the cylinder to form a first space and a first space partitioned by the wall. The cord is drawn out between two spaces, and has an outer cylinder having a first contact means for contacting one surface of the wall and a second contact means for contacting the other surface of the wall. An inner cylinder insertable into the outer cylinder so that the wall is sandwiched between the first contact means and the second contact means, and the outer cylinder includes a plurality of first cylinders. Second locking means including locking means, wherein the inner cylinder is paired with one of the first locking means and is capable of locking the outer cylinder and the inner cylinder in a direction opposite to the insertion direction. A plurality of cord bushings, wherein the cord bushing is configured to change the combination of the first hooking means and the second hooking means for hooking while inserting the inner cylinder relative to the outer cylinder. The first contact means and the second contact means are narrowed so that the wall can be held, and at least one pair of the first hooking means and the second hooking means are hooked. In this case, the second hooking means and the non-hooking first hooking means are present, and the second hooking means side from the non-hooking first hooking means to the first hooking means The second non-latching latch is located on the side of the second latching means that is latchable to the first latching means from the latched first latching means. The first hooking means and the second hooking means are arranged so that there is at least one non-hooking first hooking means that is shorter than the distance to the means. The term "cylinder" as used herein is not limited to a cylinder but includes a square tube.

The cord bushing according to claim 2 is the cord bushing according to claim 1, wherein at least one of the first contact means and the second contact means includes an elastic means, and the elastic means includes the first contact means and the second contact means. When the wall is held by the second contact means, the wall is brought into contact with the wall and elastically deformed, and the elastic means holds the wall by the first contact means and the second contact means. Whichever combination of the first hooking means and the second hooking means is used, the elastic means is elastically deformed in that state.

The cord bushing according to claim 3 is the cord bushing according to claim 1 or 2, wherein the inner cylinder is penetrable from a hole provided in the wall from the second space, and the second contact means. Is configured to be exposed to the first space side when the second space side wall is in contact with the second space side wall, and the outer cylinder is configured to have the second space side on the first space side. An inner cylinder is relatively inserted, and the second contact means is in contact with the wall on the second space side, and the first contact means is in contact with the wall on the first space side. Hold the wall.

The cord bushing according to claim 4 is the cord bushing according to any one of claims 1 to 3, wherein the first hooking means is arranged on a straight line in the insertion direction passing through one of the first hooking means. The first hooking means is configured to be absent.

The cord bushing according to the first aspect has the following effects. That is, the cord bushing according to claim 1 comprises an outer cylinder and an inner cylinder, is cylindrically attached to a hole provided in the wall, and the cord is passed through the cylinder to be partitioned by the wall. The code is drawn out between the space and the second space. The inner cylinder is relatively inserted into the outer cylinder. The outer cylinder contacts one surface of the wall by the first contact means. The second contact means causes the inner cylinder to contact the other surface of the wall. The wall is sandwiched by the outer cylinder and the inner cylinder sandwiching both sides of the wall. At this time, one of the plurality of first hooking means on the outer cylinder is paired with one of the plurality of second hooking means on the inner cylinder, so that the outer cylinder and the inner cylinder are hooked in the opposite directions of the insertion direction. Stop. This limits the movement of the first contact means and the second contact means in the direction in which the distance increases. The inner cylinder is inserted relative to the outer cylinder, and the combination of the first hooking means and the second hooking means to be hooked is changed to change the distance between the first contacting means and the second contacting means. By narrowing, the wall is clamped. When at least one pair of the first hooking means and the second hooking means are hooked, the at least one first hooking means is in a state not hooked with the second hooking means. Among the non-engaged first hooking means, there are from the non-hanging first hooking means to the first hooking means and the second hooking means on the side of the second contact means capable of hooking. There is at least one distance shorter than the distance from the hooked first hooking means to the first hooking means and the second hooking means on the side of the second contact means that can be hooked. Thus, when the inner cylinder is relatively inserted into the outer cylinder, the first hooking means that is currently hooked is the second hooking means that is on the side of the second contacting means that can be hooked with the first hooking means. Prior to being hooked by the means, the non-hooking first hooking means is hooked by the second hooking means on the side of the second contact means which can be hooked with the first hooking means. Therefore, the relative positions of the outer cylinder and the inner cylinder that sandwich the wall can be changed little by little. Therefore, when the first contact means and the second contact means are brought as close as possible to each other to sandwich the wall between the outer cylinder and the inner cylinder, a gap between the outer cylinder and the wall and a gap between the wall and the inner cylinder occur. The gap can be made extremely small. Therefore, regardless of the wall thickness, there is an effect that the gap can be sandwiched by reducing the gap between the outer cylinder and the wall and the gap between the wall and the inner cylinder.

According to the cord bushing of the second aspect, in addition to the effect of the cord bushing of the first aspect, the following effect is exerted. That is, at least one of the first contact means and the second contact means has an elastic means. The elastic means is elastically deformed when the wall is sandwiched between the first contact means and the second contact means. Then, no matter which combination of the first hooking means and the second hooking means is used, the elastic means operates in the state where the first hooking means and the second hooking means hold the wall. Elastic deformation occurs. The elastic means that has undergone elastic deformation presses at least one of the first contact means and the second contact means against the wall according to the law of action and reaction. This has the effect that the cord bushing can be attached to the wall without wobbling.

According to the code bushing of claim 3, in addition to the effect of the code bushing of claim 1 or 2, the following effect is achieved. That is, the inner cylinder is inserted from the second space so as to penetrate through the hole provided in the wall. Then, when the second contact means is in contact with the wall on the second space side, the second hooking means appears on the first space side, and the inner cylinder is relatively relative to the outer cylinder on the first space side. Is inserted. The second contact means comes into contact with the second space side wall, and the first contact means comes into contact with the first space side wall, whereby the wall is clamped. As a result, there is an effect that it is possible to provide a cord bushing that can cope with walls having various thicknesses, simply by preparing an inner cylinder that can penetrate the wall.

According to the code bushing of claim 4, in addition to the effect of the code bushing of any of claims 1 to 3, the following effect is achieved. That is, the other first hooking means does not exist on the straight line in the insertion direction passing through the one first hooking means. If the other first hooking means exists on a straight line in the insertion direction passing through the one first hooking means, the one first hooking means and the other first hooking means are arranged at a narrow interval. It is necessary to provide it, and industrial processing becomes extremely difficult. On the other hand, by configuring the other first hooking means so as not to exist on the straight line in the insertion direction passing through the one first hooking means, the first hooking means is provided at a narrow interval. There is no need. Since this facilitates industrial processing, it is possible to reduce the occurrence of defective products and improve the production efficiency of the cord bushing.

(A) is a perspective view of the whole cord bushing which is a 1st embodiment of the present invention, and (b) is a right side view of the whole cord bushing. It is sectional drawing which cut|disconnected the inner cylinder in the left-right direction. It is a perspective view of an outer cylinder. FIG. 7 is a cross-sectional view of the cord bushing 10 when the outer cylinder second claw of the outer cylinder is engaged with the inner cylinder seventh claw of the inner cylinder and is cut in the IV direction. (A) is the figure which showed typically the state where the outer cylinder 2nd claw has locked the inner cylinder, (b) shows the state where the outer cylinder 1st claw has locked the inner cylinder. It is the figure which showed typically. (A) is the figure which showed typically the state where the outer cylinder 2nd hook|hook latches the inner cylinder, and the contact surface of an outer cylinder is contacting the wall, (b) is the outer cylinder 1st It is the figure which showed typically the state where the claw hooks the inner cylinder and the contact surface of the outer cylinder is in contact with the wall. (A) is the figure which showed typically the state which the outer cylinder 2nd nail|catch has locked the inner cylinder in the code bushing which is 2nd Embodiment of this invention, (b) is an outer cylinder. It is the figure which showed typically the state where the 1st nail|hook has hooked the inner cylinder. (A) is the figure which showed typically the state which the 3rd claw of an outer cylinder has locked the inner cylinder in the cord bushing which is a 3rd embodiment of the present invention, and (b) is an outer cylinder. It is the figure which showed typically the state where the 2nd nail|hook has locked the inner cylinder, (c) is the figure which showed typically the state which the outer cylinder 1st nail|hook has locked the inner cylinder. Is. (A) is the figure which showed typically the state where the outer cylinder 3rd claw has locked the inner cylinder in the cord bushing which is a 4th embodiment of the present invention, and (b) is the outer cylinder. It is the figure which showed typically the state where the 2nd nail|hook has locked the inner cylinder, (c) is the figure which showed typically the state which the outer cylinder 1st nail|hook has locked the inner cylinder. Is.

Embodiments for carrying out the present invention will be described below with reference to the drawings. First, the outline of the code bushing 10 will be described with reference to FIGS. 1 to 3. FIG. 1A is a perspective view showing the entire cord bushing 10 according to the first embodiment of the present invention, and FIG. 1B is a right side view of the cord bushing 10 (shown in FIG. 1A). 2 is a view seen from the direction Ib), FIG. 2 is a cross-sectional view of the inner cylinder 12 taken in the left-right direction, and FIG. 3 is a perspective view of the outer cylinder 11. In this description, for convenience, the direction shown in FIG.

The cord bushing 10 includes an outer cylinder 11 and an inner cylinder 12. The cord bushing 10 is attached to the wall by inserting the inner cylinder 12 into a hole provided in the wall and inserting the outer cylinder 11 into the inner cylinder 12 on the wall surface opposite to the wall surface into which the inner cylinder 12 is inserted. The cord is pulled out from one side separated by the wall to the other side. The insertion is a concept of inserting the inner cylinder 12 into the outer cylinder 11 or inserting the outer cylinder 11 into the inner cylinder 12. In the present embodiment, among the spaces partitioned by the wall, the space in which the outer cylinder 11 is provided is called the first space, and the space on the side where the inner cylinder 12 is inserted into the hole provided in the wall is the second space. It is called space.

The outer cylinder 11 is a member for inserting the inner cylinder 12 into the inner wall 12 and locking the inner cylinder 12 on the wall surface on the first space side opposite to the wall surface on the second space side into which the inner cylinder 12 is inserted. is there. The inner cylinder 12 is a member that penetrates the wall and draws out the cord.

The outer cylinder 11 includes an outer cylinder first claw 30 and an outer cylinder second claw 31. On the other hand, the inner cylinder 12 includes an inner cylinder claw 13. The outer cylinder first claw 30 and the outer cylinder second claw 31 are claws for locking the outer cylinder 11 to the inner cylinder 12 by locking the inner cylinder claw 13. The inner cylinder claw 13 is a claw for locking the inner cylinder 12 to the outer cylinder 11 by being locked by the outer cylinder first claw 30 or the outer cylinder second claw 31. When the outer cylinder 11 is inserted into the inner cylinder 12, the outer cylinder first claw 30 or the outer cylinder second claw 31 locks the inner cylinder claw 13 so that the outer cylinder 11 locks the inner cylinder 12. At this time, although the wall is not shown in FIG. 1, the outer cylinder 11 presses the left side (wall surface on the first space side) of the wall and the inner cylinder 12 presses the right side (wall surface on the second space side) of the wall. Then, the wall will be pinched.

Here, the configuration of the inner cylinder 12 will be described. As shown in FIGS. 1A and 2, the inner cylinder 12 includes an inner cylinder claw 13, a flange 14, an inner cylinder hole 15, and a cylinder 16. An annular flange 14 having an outer diameter larger than the inner diameter of the hole formed in the wall is provided at the right end of the inner cylinder 12. The flange 14 contacts the wall surface on the second space side and restricts the inner cylinder 12 from further moving to the left. A cylinder 16 concentric with the flange 14 is provided at a right angle from the flange 14 toward the left. The cylinder 16 is a tube for penetrating a hole provided in the wall. On the outer peripheral surface of the cylinder 16, a plurality of annular inner cylinder claws 13 are provided at equal intervals in parallel with the flange 14. Further, an inner cylindrical hole 15 is provided so as to penetrate the flange 14 and the inside of the cylinder 16. The inner cylindrical hole 15 is a hole for allowing the cord to pass through the inside of the cylinder 16.

The outer diameter of the cylinder 16 is smaller than the inner diameter of the outer cylinder hole 33 of the outer cylinder 11, which will be described later, and the cylinder 16 can penetrate the outer cylinder hole 33. As described above, one of the inner cylinder claws 13 provided on the cylinder 16 is locked by the outer cylinder first claw 30 or the outer cylinder second claw 31 provided on the outer cylinder 11, so that the inner cylinder 12 Is locked by the outer cylinder 11. At this time, the relative positions of the outer cylinder 11 and the inner cylinder 12 are changed by changing the combination of the inner cylinder claw 13 to be hooked, the outer cylinder first claw 30, and the outer cylinder second claw 31.

Further, since the outer diameter of the cylinder 16 is smaller than the inner diameter of the hole provided in the wall, the cylinder 16 can be inserted into the hole provided in the wall. Further, the distance from the left end of the cylinder 16 to the flange 14 is such that the cylinder 16 penetrates a hole provided in the wall and is locked by the outer cylinder 11. Therefore, the outer cylinder 11 is inserted into the cylinder 16 protruding from the wall on the first space side by penetrating the cylinder 16 of the inner cylinder 12 into the hole provided in the wall. 12 can be hooked.

As shown in FIG. 2, the outer peripheral surface of the cylinder 16 of the inner cylinder 12 has eight saw tooth-shaped inner cylinder claws 13 (the inner cylinder first claw 13a to the inner cylinder eighth claw 13h) along the circumference. Are formed at equal intervals in the direction. Each inner cylinder claw 13 is provided so as to intersect the cylinder 16 at a right angle on the flange 14 side and intersect the cylinder 16 at an acute angle on the left end side.

The inner peripheral surface of the cylinder 16 has a smooth structure without protrusions and the like. This makes it easier for the cord to pass when it is inserted into the cylinder 16. A contact surface 17 is provided on the left surface of the flange 14. The contact surface 17 is a surface for contacting the wall surface of the flange 14 on the second space side. Since the contact surface 17 is a flat surface, it can be brought into close contact with the wall.

Next, the configuration of the outer cylinder 11 will be described. As shown in FIGS. 1A and 3, the outer cylinder 11 has a flat annular cylindrical shape, and includes an outer cylinder first claw 30, an outer cylinder second claw 31, a contact surface 32, and an outer surface. A cylindrical hole 33, a support member 34, and a recess 35 are provided. The outer cylinder hole 33 is a hole for inserting the outer cylinder 11 into the inner cylinder 12. Further, the outer cylinder 11 is provided with a pair of outer cylinder first claws 30a and 30b at positions symmetrical with respect to the center of the circle of the annular outer cylinder 11 (hereinafter, referred to as a pair of outer cylinder first The claw is called the outer cylinder first claw 30). The outer cylinder 11 is provided with a pair of outer cylinder second claws 31a and 31b at positions that are offset by 90 degrees in the clockwise direction from the respective outer cylinder first claws 30a and 30b (hereinafter referred to as a pair of outer cylinder first claws 31a and 31b). The two claws are referred to as the outer cylinder second claw 31). The outer cylinder first claw 30 and the outer cylinder second claw 31 include claws protruding from the inner circumference of the annular outer cylinder 11 toward the outer cylinder hole 33.

The outer-cylinder first claw 30 and the outer-cylinder second claw 31 are provided in pairs at positions symmetrical with respect to each other. Therefore, when the outer cylinder 11 hooks the inner cylinder 12, the force from the outer cylinder 11 acts evenly on the inner cylinder 12. Therefore, there is an effect that the outer cylinder 11 can firmly fix the inner cylinder 12.

Further, the outer cylinder 11 is provided with a pair of contact surfaces 32a and 32b at positions shifted from the outer cylinder first claws 30a and 30b by about 45 degrees in the clockwise direction (hereinafter, the pair of contact surfaces will be referred to as the contact surface 32). That). The contact surface 32 is a surface for contacting the wall on the first space side in the outer cylinder 11.

The contact surface 32 is provided in a recess 35 provided in the bottom surface on the right side of the outer cylinder 11 (the surface on the flange 14 side when the cylinder 16 of the inner cylinder 12 is inserted into the outer cylinder hole 33) and the outer peripheral side of the outer cylinder 11. Is supported by the support member 34 having the characteristics of a leaf spring, which will be described later, so as to project from the right bottom surface of the outer cylinder 11 and be elastically contactable with the wall surface.

The outer diameter of the outer cylinder 11 is larger than the inner diameter of the hole provided in the wall. Therefore, the outer cylinder 11 cannot be inserted into the hole provided in the wall, and when the bottom surface on the right side of the outer cylinder 11 is in contact with the wall on the first space side, the outer cylinder 11 can move further to the right. Can not.

An interval in the insertion direction from the bottom surface on the right side of the outer cylinder 11 to the tip of the claw of the outer tube first claw 30a, and an insertion direction from the bottom surface on the right side of the outer tube 11 to the tip of the claw of the outer cylinder first claw 30b. The intervals are set equal to each other. Therefore, when the outer cylinder first claw 30a is in a hooked state with any of the inner cylinder first claw 13a to the inner cylinder eighth claw 13h, the outer cylinder first claw 30b is locked by the outer cylinder first claw 30a. The same inner cylinder claw 13 that is used is hooked. That is, the outer cylinder first claws 30 a and 30 b face each other and hook one inner cylinder claw 13.

Similarly, the spacing in the insertion direction from the bottom surface on the right side of the outer cylinder 11 to the tip portion of the claw of the outer tube second claw 31a, and the bottom surface on the right side of the outer tube 11 to the tip portion of the claw of the outer cylinder second claw 31b. And the distance in the insertion direction is equal. Therefore, when the outer cylinder second claw 31a is in a locked state with any of the inner cylinder first claw 13a to the inner cylinder eighth claw 13h, the outer cylinder second claw 31b is locked by the outer cylinder second claw 31a. The same inner cylinder claw 13 that is used is hooked. That is, the outer cylinder second claws 31 a and 31 b face each other and hook one inner cylinder claw 13.

On the other hand, the interval in the insertion direction from the bottom surface on the right side of the outer cylinder 11 to the tip portion of the claw of the outer tube first claw 30 is from the bottom surface on the right side of the outer tube 11 to the tip portion of the claw of the outer cylinder second claw 31. It is longer than the interval in the insertion direction of. Although the details will be described later, when the outer cylinder first claw 30 is in a hooked state with any one of the inner cylinder first claw 13a to the inner cylinder eighth claw 13h, the outer cylinder second claw 31 is any inner cylinder claw. 13 is also configured not to be hooked. On the contrary, when the outer cylinder second claw 31 hooks any one of the inner cylinder first claw 13a to the inner cylinder eighth claw 13h, the outer cylinder first claw 30 is not attached to any of the inner cylinder claws 13. It is configured so that it does not hang.

The outer cylinder first claw 30 and the outer cylinder second claw 31 have surfaces provided on the left side of the outer cylinder first claw 30 and the outer cylinder second claw 31 in a direction perpendicular to the inner peripheral surface of the outer cylinder 11. On the right side of the outer cylinder first claw 30 and the outer cylinder second claw 31, there is a surface provided at an acute angle to the inner peripheral surface of the outer cylinder 11.

The support member 34 is a member for supporting the contact surface 32 on the outer cylinder 11 so as to be elastically contactable with the wall surface. When the outer cylinder 11 is pushed into the wall side and the wall on the first space side comes into contact with the contact surface 32, the support member 34 is deformed via the contact surface 32. The recess 35 is a space for storing the support member 34 when the support member 34 is elastically deformed.

Next, a state in which the outer cylinder 11 locks the inner cylinder 12 will be described with reference to FIG. FIG. 4 is a cross-sectional view of the cord bushing 10 when cut in the IV direction in a state in which the outer-cylinder second claw 31a of the outer cylinder 11 holds the inner-cylinder seventh claw 13g of the inner cylinder 12. In the upper half of FIG. 4, the inner cylinder 12 and the outer cylinder second claw 31a are shown by solid lines, and the state of the outer cylinder first claw 30a at that time is shown by imaginary lines. In the lower half of FIG. 4, the inner cylinder 12 and the outer cylinder first claw 30a are shown by solid lines, and the state of the outer cylinder second claw 31a at that time is shown by imaginary lines.

As described above, the inner cylindrical claw 13 intersects the cylinder 16 at a right angle on the flange 14 side, and intersects the cylinder 16 at an acute angle on the left end side. On the other hand, the outer cylinder first claw 30 and the outer cylinder second claw 31 are surfaces provided on the left side of the outer cylinder first claw 30 and the outer cylinder second claw 31 in a direction perpendicular to the inner peripheral surface of the outer cylinder 11. And a surface provided on the right side of the outer cylinder first claw 30 and the outer cylinder second claw 31 at an acute angle to the inner peripheral surface of the outer cylinder 11.

When the right side surfaces of the outer cylinder first claw 30a and the outer cylinder second claw 31a of the outer cylinder 11 slide on the surfaces of the inner cylinder claw 13 that intersects the cylinder 16 at an acute angle, the outer cylinder 11 becomes It is possible to move from the left end to the flange 14 side (insertion direction). On the other hand, the left side surfaces of the outer cylinder first claw 30a and the outer cylinder second claw 31a intersecting the inner peripheral surface of the outer cylinder 11 at right angles face the surfaces of the inner cylinder claw 13 intersecting at right angles with the cylinder 16. The inner cylinder 12 is restricted from moving to the right, and the outer cylinder 11 hooks the inner cylinder 12. At this time, since the outer cylinder 11 latches the inner cylinder 12 and the inner cylinder 12 also latches the outer cylinder 11, the outer cylinder 11 is the left end side from the flange 14 side of the inner cylinder 12 ( Restrict movement to the direction opposite to the insertion direction). Therefore, when the outer cylinder 11 is inserted into the inner cylinder 12, the outer cylinder 11 can move in the direction of the flange 14 (insertion direction), but once the outer cylinder first claw 30a or the outer cylinder second claw 31a moves inside. When the tube claw 13 is hooked, the outer tube 11 cannot return to the left (the direction opposite to the insertion direction).

As in the state shown in FIG. 4, when the outer cylinder second claw 31a of the outer cylinder 11 engages the inner cylinder claw 13 of the inner cylinder 12, the outer cylinder first claw 30a of the outer cylinder 11 is The inner cylinder claw 13 of 12 is not locked and is in a slidable state.

When the outer cylinder 11 moves to the right (insertion direction), the outer cylinder first claw 30a of the outer cylinder 11 hooks the inner cylinder claw 13 of the inner cylinder 12 this time. In that case, the outer cylinder second claw 31 a of the outer cylinder 11 is in a slidable state without engaging the inner cylinder claw 13 of the inner cylinder 12.

Thus, when the outer cylinder 11 moves to the right (insertion direction), one of the outer cylinder first claw 30 and the outer cylinder second claw 31 latches the inner cylinder claw 13, and the other one of the inner cylinder claw 30 and the inner cylinder claw 13. 13 and the non-hanging state.

Next, the relationship among the outer cylinder first claw 30, the outer cylinder second claw 31, and the inner cylinder claw 13 will be described with reference to FIG. FIG. 5A is a diagram schematically showing a state in which the outer cylinder second claw 31a latches the inner cylinder fourth claw 13d, and FIG. 5B shows the outer cylinder first claw 30a. It is the figure which showed typically the state which has locked the inner cylinder 4th claw 13d. In these figures, how the outer cylinder first claw 30a and the outer cylinder second claw 31a are relative to the inner cylinder claw 13 in the insertion direction (direction from the left end of the inner cylinder 12 toward the flange 14). The inner cylinder 12 and the outer cylinder second claw 31a are shown by a solid line, and the state of the outer cylinder first claw 30a at that time is shown by an imaginary line.

In the present embodiment, the inner tubular claws 13 are provided at equal intervals of the distance P1. On the other hand, the distance between the outer cylinder first claw 30a and the outer cylinder second claw 31a in the left-right direction (insertion direction) is the distance P2. The relationship between P1 and P2 is expressed by the following equation (1).

P2=P1×1/2 (1)

That is, the distance P2 is half the distance P1. Therefore, as shown in FIG. 5A, when the outer cylinder second claw 31a locks the inner cylinder fourth claw 13d, the outer cylinder first claw 30a locks any of the inner cylinder claws 13. Not not.

When the outer cylinder 11 is inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction) from the state of FIG. 5A, the outer cylinder 11 and the inner cylinder 12 are in the state of FIG. 5B. Move to. That is, the outer cylinder second claw 31a is disengaged from the inner cylinder fourth claw 13d, and the outer cylinder second claw 31a is engaged with the inner cylinder third claw 13c before the outer cylinder first claw 13c. 30a hooks the inner cylinder fourth pawl 13d. This is because the outer cylinder second claw 31a needs to move the distance P1 in order to lock the inner cylinder third claw 13c, whereas the outer cylinder first claw 30a moves the inner cylinder fourth claw 13d. This is because it suffices to move a distance that is half the distance P1 (that is, the distance P2) in order to stop.

Similarly, when the outer cylinder 11 is further inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction), the outer cylinder first claw 30a of the outer cylinder 11 is disengaged from the inner cylinder fourth claw 13d. Then, the outer cylinder second claw 31a latches the inner cylinder third claw 13c before the outer cylinder first claw 30a latches the inner cylinder third claw 13c. This is because the outer cylinder first claw 30a needs to move a distance P1 in order to lock the inner cylinder third claw 13c, whereas the outer cylinder second claw 31a moves the inner cylinder third claw 13c. This is because it suffices to move a distance that is half the distance P1 (that is, the distance P2) in order to stop. Similarly thereafter, the outer cylinder 11 latches the inner cylinder 12 while changing the combination of the inner cylinder claw 13 on which the outer cylinder first claw 30a and the outer cylinder second claw 31a lock, and the outer cylinder 11 is separated by the distance P1. Move in the insertion direction by 1/2 distance.

As a result, the outer cylinder 11 can be moved toward the flange 14 by half the distance P1. Therefore, the cord bushing 10 occurs when the contact surface 32 of the outer cylinder 11 and the contact surface 17 of the inner cylinder 12 are brought as close as possible to each other so as to sandwich the wall between the outer cylinder 11 and the inner cylinder 12. There is an effect that the gap between the outer cylinder 11 and the wall surface on the first space side and the gap between the inner cylinder 12 and the wall surface on the second space side can be made extremely small.

By the way, if the outer cylinder second claws 31a are provided on a straight line passing through the outer cylinder first claws 30a, the outer cylinder first claws 30a and the outer cylinder are arranged at intervals such that the above expression (1) is satisfied. In order to provide the second claw 31a with the outer cylinder 11, it is necessary to provide two claws at a narrow interval, which makes industrial processing extremely difficult. In the cord bushing 10 according to the present embodiment, as described above, the pair of outer cylinder second claws 31a and 31b are provided at positions offset by about 90 degrees in the clockwise direction from the respective outer cylinder first claws 30a and 30b. The outer cylinder second claw 31 is provided so as not to exist on the straight line passing through the outer cylinder first claw 30 in the insertion direction. Therefore, the interval in the insertion direction from the bottom surface on the right side of the outer cylinder 11 to the tip end portion of the claw of the outer cylinder first claw 30a, and the distance from the bottom surface on the right side of the outer cylinder 11 to the tip end portion of the claw of the second outer cylinder claw 31a. There is an effect that the difference from the interval in the insertion direction can be easily adjusted.

Further, according to the present invention, it is possible to shorten the moving distance for the outer cylinder 11 to move stepwise without narrowing the interval between the inner cylinder claws 13. Therefore, it is not necessary to obtain a high degree of accuracy when industrially processing the inner cylinder claw 13. Therefore, it is possible to reduce the occurrence of defective products and increase the production efficiency of the code bushing 10.

Next, the operation of the contact surface 32 when the outer cylinder 11 contacts the wall w will be described with reference to FIG. FIG. 6A shows a state in which the outer cylinder second claw 31a of the outer cylinder 11 latches the inner cylinder fifth claw 13e of the inner cylinder 12, and the contact surface 32a of the outer cylinder 11 is in contact with the wall w. FIG. 6( b) is a diagram schematically showing that the outer cylinder first claw 30 a of the outer cylinder 11 hooks the inner cylinder fifth claw 13 e of the inner cylinder 12, and the contact surface 32 a of the outer cylinder 11 is It is the figure which showed typically the state in contact with the wall w. In these figures, the inner cylinder 12, the contact surface 32, the support member 34, and the outer cylinder second claw 31a are shown by solid lines, and the state of the outer cylinder first claw 30a at this time is shown by imaginary lines.

In FIG. 6A, the outer cylinder second claw 31a hooks the inner cylinder fifth claw 13e. The contact surface 32a is in contact with the wall w on the first space side in a state where the support member 34 is not elastically deformed. The contact surface 17 of the flange 14 is in contact with the wall surface on the second space side opposite to the wall surface on the first space side with which the contact surface 32a is in contact. At this time, the distance that the contact surface 32a projects from the outer cylinder 11 toward the wall surface on the first space side is a distance Q1.

In FIG. 6B, the outer cylinder 11 approaches the wall surface on the first space side by one step, and the outer cylinder first claw 30a hooks the inner cylinder fifth claw 13e. The contact surface 32a is in contact with the wall w in a state where the support member 34 is elastically deformed by being sandwiched between the outer cylinder 11 and the wall w. At this time, the distance that the contact surface 32a projects from the outer cylinder 11 toward the wall surface on the first space side is a distance Q2. The relationship between the distance Q1, the distance Q2, and the above-mentioned distance P2 can be expressed by the following equation (2).

Q1-P2=Q2...(2)

That is, the support member 34 is elastically deformed by the distance (distance P2) that the outer cylinder 11 approaches the wall w side. Then, with the support member 34 elastically deformed, the outer cylinder first claw 30a latches the inner cylinder fifth claw 13e, and the contact surface 32a and the contact surface 17 of the inner cylinder 12 come into contact with the wall w. There is. At this time, the support member 34 is elastically deformed by being sandwiched between the outer cylinder 11 and the wall w, and pushes the outer cylinder first claw 30a back to the inner cylinder fifth claw 13e according to the law of action/reaction while making contact. The surface 32a is pushed back to the wall w. Accordingly, when the wall w is to be sandwiched between the outer cylinder 11 and the inner cylinder 12, the cord bushing 10 can be attached to the wall without wobbling.

As described above, according to the cord bushing 10 in the first embodiment, when one of the outer cylinder first claw 30 and the outer cylinder second claw 31 hooks the inner cylinder claw 13, the other inner It is in a non-engaged state with the tubular claw 13. When the outer cylinder 11 is moved in the insertion direction in this state, the outer cylinder first claw 30 or the outer cylinder second claw 31 which is not engaged with the inner cylinder claw 13 then engages the inner cylinder claw 13. The moving distance at this time is half of the distance from the hooked outer cylinder first claw 30 or outer cylinder second claw 31 to the next inner cylinder claw 13 in the insertion direction. This makes it possible to hook the inner cylinder 12 while gradually moving the outer cylinder 11 to the flange 14 side. Therefore, the contact surface 32 of the outer cylinder 11 and the contact surface 17 of the inner cylinder 12 are brought as close as possible to each other, and when the wall is sandwiched between the outer cylinder 11 and the inner cylinder 12, the outer cylinder 11 and the first cylinder 12 are generated. The gap between the wall surface on the first space side and the gap between the inner cylinder 12 and the wall surface on the second space side can be made extremely small. Therefore, regardless of the wall thickness, the effect of being able to sandwich the wall by reducing the gap between the outer cylinder 11 and the wall surface on the first space side and the gap between the wall surface on the second space side and the inner cylinder 12 is provided. is there.

Further, the inner cylinder 12 is inserted from the wall surface on the side of the second space, which is one wall surface, so as to penetrate through the hole provided in the wall. When the contact surface 17 is in contact with the wall surface on the second space side, the inner cylinder claw 13 is located on the first space side opposite to the wall surface on the second space side into which the inner cylinder 12 is inserted. When exposed, the outer cylinder 11 is inserted into the inner cylinder 12 on the first space side. At this time, the outer cylinder 11 hooks the inner cylinder 12 while moving to the flange 14 side at an interval half the interval of the inner cylinder claw 13. The contact surface 17 contacts the wall surface on the second space side where the inner cylinder 12 is inserted, and the contact surface 32 is the first space opposite to the wall surface on the second space side where the inner cylinder 12 is inserted. The wall is clamped by coming into contact with the side wall surface. As a result, there is an effect that the cord bushing 10 that can cope with walls having various thicknesses can be provided only by preparing the inner cylinder 12 that can penetrate the wall.

Next, the code bushing 10 in the second embodiment will be described with reference to FIG. 7. In the first embodiment, the case has been described in which the distance between the outer cylinder first claw 30 and the outer cylinder second claw 31 in the insertion direction is 1/2 of the distance at which the inner cylinder claw 13 is provided. On the other hand, in the cord bushing 10 of the second embodiment, the interval between the outer cylinder first claw 30 and the outer cylinder second claw 31 in the insertion direction is set to 3/2 of the interval at which the inner cylinder claw 13 is provided. To do.

Hereinafter, the code bushing 10 of the second embodiment will be described focusing on differences from the code bushing 10 of the first embodiment, and the same components as those of the code bushing 10 of the first embodiment will be denoted by the same reference numerals. And its description is omitted.

FIG. 7A is a view schematically showing a state in which the outer cylinder second claw 31a hooks the inner cylinder 12 in the cord bushing 10 according to the second embodiment, and FIG. It is the figure which showed typically the state where the outer cylinder 1st claw 30a has locked the inner cylinder 12. In these figures, how the outer cylinder first claw 30a and the outer cylinder second claw 31a are relative to the inner cylinder claw 13 in the left-right direction (direction from the left end of the inner cylinder 12 toward the flange 14). The inner cylinder 12 and the outer cylinder second claw 31a are shown by a solid line, and the state of the outer cylinder first claw 30a at that time is shown by an imaginary line.

As shown in FIG. 7A, the outer cylinder second claw 31a hooks the inner cylinder third claw 13c. At this time, the outer cylinder first claw 30a does not engage any of the inner cylinder claws 13. Further, as described above, the distance between the outer cylinder first claw 30a and the outer cylinder second claw 31a in the insertion direction is 3/2 of the distance at which the inner cylinder claw 13 is provided. The relationship between the distance P1 which is the interval at which the inner cylinder claw 13 is provided and the distance P3 which is the interval between the outer cylinder first claw 30a and the outer cylinder second claw 31a in the left-right direction (insertion direction) is expressed by the following equation (3). ).

P3=P1×3/2 (3)

Further, the distance from the outer cylinder second claw 31a to the inner cylinder second claw 13b which is the next inner cylinder claw 13 in the insertion direction is P1. On the other hand, the distance P4 from the outer cylinder first claw 30a to the inner cylinder fourth claw 13d, which is the next inner cylinder claw 13 in the insertion direction, can be expressed by the following equation (4).

P4=P3-P1
=P1/2...(4)

When the outer cylinder 11 is inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction) from the state of FIG. 7A, the outer cylinder 11 and the inner cylinder 12 are in the state of FIG. 7B. Move to. That is, the outer cylinder first claw is released before the outer cylinder second claw 31a is unlocked from the inner cylinder third claw 13c, and the outer cylinder second claw 31a is engaged with the inner cylinder second claw 13b. 30a hooks the inner cylinder fourth pawl 13d. This is because the outer cylinder 11 needs to move the distance P1 in order for the outer cylinder second claw 31a to lock the inner cylinder third claw 13c, whereas the outer cylinder first claw 30a needs to move. This is because the outer cylinder 11 need only move a distance that is half the distance P1 (that is, the distance P4) to lock the four claws 13d.

Similarly, when the outer cylinder 11 is further inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction), the outer cylinder first claw 30a of the outer cylinder 11 is disengaged from the inner cylinder fourth claw 13d. Then, the outer cylinder second claw 31a latches the inner cylinder second claw 13b before the outer cylinder first claw 30a latches the inner cylinder third claw 13c. This is because the outer cylinder first claw 30a needs to move a distance P1 in order to lock the inner cylinder third claw 13c, while the outer cylinder second claw 31a moves the inner cylinder second claw 13b. This is because it suffices to move only half the distance P1 (that is, the distance P4) in order to hang it. Similarly thereafter, the outer cylinder 11 latches the inner cylinder 12 while changing the combination of the inner cylinder claw 13 on which the outer cylinder first claw 30a and the outer cylinder second claw 31a lock, and the outer cylinder 11 is separated by the distance P1. Move in the insertion direction by 1/2 distance.

In the cord bushing 10 according to the second embodiment, the distance between the outer cylinder first claw 30 and the outer cylinder second claw 31 in the insertion direction may be increased to 3/2 times the distance at which the inner cylinder claw 13 is provided. Instead, the distance that the outer cylinder 11 moves can be half the distance P1 as in the first embodiment. As a result, the movement distance for the outer cylinder 11 to move stepwise can be shortened without narrowing the space between the outer cylinder first claw 30 and the outer cylinder second claw 31 in the insertion direction or the space between the inner cylinder claws 13. it can. That is, the outer cylinder 11 hooks the inner cylinder 12 while moving toward the flange 14 side at an interval half the interval of the inner cylinder claw 13. Therefore, when the cord bushing 10 is industrially processed, the clearance between the outer cylinder 11 and the wall surface on the first space side, the space on the second space side, regardless of the wall thickness, is not required even if high accuracy is required. The wall can be sandwiched by reducing the gap between the wall surface and the inner cylinder 12. Therefore, it is possible to reduce the number of defective products and increase the production efficiency of the code bushing 10.

In addition, the code bushing 10 according to the second embodiment has the same function and effect as the code bushing 10 according to the first embodiment, based on the same components as those of the code bushing 10 according to the first embodiment.

Next, the code bushing 10 according to the third embodiment will be described with reference to FIG. In the cord bushing 10 according to the first embodiment, the outer cylinder 11 is provided with two pairs of claws (the outer cylinder first claw 30 and the outer cylinder second claw 31) at a half of the interval at which the inner cylinder claw 13 is provided. The case was explained. On the other hand, in the cord bushing 10 according to the third embodiment, the outer cylinder 11 is provided with three pairs of claws (the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42). The distance between the first claw 40 and the outer cylinder second claw 41 in the insertion direction and the distance between the outer cylinder second claw 41 and the outer cylinder third claw 42 in the insertion direction are each 1/m of the interval at which the inner cylinder claw 13 is provided. It is provided at intervals of 3.

Hereinafter, the code bushing 10 of the third embodiment will be described focusing on the points different from the code bushing 10 of the first embodiment, and the same components as those of the code bushing 10 of the first embodiment will be designated by the same reference numerals. And its description is omitted.

FIG. 8A is a diagram schematically showing a state in which the outer cylinder third claw 42a of the cord bushing 10 according to the third embodiment hooks the inner cylinder 12, and FIG. It is the figure which showed typically the state where the outer cylinder 2nd claw 41a has locked the inner cylinder 12, and FIG.8(c) shows the outer cylinder 1st claw 40a which has locked the inner cylinder 12. As shown in FIG. It is the figure which showed the state typically. In these drawings, with respect to the inner cylinder claw 13, the outer cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a are arranged in the left-right direction (direction from the left end of the inner cylinder 12 toward the flange 14). ) Relative to each other, the inner cylinder 12 and the outer cylinder second claw 41a are indicated by solid lines, and the outer cylinder first claw 40a and the outer cylinder first claw 41a at that time are shown. The state with the three claws 42a is shown by an imaginary line.

As shown in FIG. 8A, the outer cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a are provided at different positions in the left-right direction of the outer cylinder 11, and are located at the leftmost position. Is provided with an outer cylinder first claw 40a, an outer cylinder second claw 41a in the middle, and an outer cylinder third claw 42a on the far right.

Although not shown, the outer cylinder 11 is provided with a pair of outer cylinder first claws 40a and 40b at a point symmetric position with respect to the center of the circle of the annular outer cylinder 11 (a pair of outer cylinder first One claw is referred to as the outer cylinder first claw 40). Then, the outer cylinder 11 is provided with a pair of outer cylinder second pawls 41a and 41b at a position that is deviated from the respective outer cylinder first pawls 40a and 40b in the clockwise direction by about 60 degrees (a pair of outer cylinder second pawls). Is referred to as the outer cylinder second claw 41). Further, the outer cylinder 11 is provided with outer cylinder third claws 42a and 42b at positions that are shifted from the outer cylinder second claws 41a and 41b in the clockwise direction by about 60 degrees (the pair of outer cylinder third claws is referred to as the outer cylinder first claw). 3 claw 42).

In FIG. 8A, the outer cylinder third claw 42a latches the inner cylinder fourth claw 13d. At this time, none of the inner cylinder claw 13 is engaged with the outer cylinder first claw 40a and the outer cylinder second claw 41a. The distance between the outer cylinder first claw 40a and the outer cylinder second claw 41a in the insertion direction and the distance between the outer cylinder second claw 41a and the outer cylinder third claw 42a in the insertion direction are a distance P5. The relationship between the distance P1 and the distance P5, which are the intervals at which the inner cylinder claws 13 are provided, can be expressed by the following equation (5).

P5=P1×1/3 (5)

When the outer cylinder 11 is inserted into the inner cylinder 12 from the state of FIG. 8A, the outer cylinder 11 and the inner cylinder 12 shift to the state of FIG. 8B. That is, the outer cylinder third claw 42a is disengaged from the inner cylinder fourth claw 13d, and this time the outer cylinder second claw 41a engages the inner cylinder fourth claw 13d. At this time, the outer cylinder 11 can move toward the flange 14 side by a distance P5 (1/3 of the interval at which the inner cylinder claw 13 is provided).

When the inner cylinder 12 is inserted into the outer cylinder 11 from the state of FIG. 8B, the outer cylinder 11 and the inner cylinder 12 shift to the state of FIG. 8C. That is, the outer cylinder second claw 41a is disengaged from the inner cylinder fourth claw 13d, and this time the outer cylinder first claw 40a engages the inner cylinder fourth claw 13d. At this time, the outer cylinder 11 can move toward the flange 14 side by a distance P5 (1/3 of the interval at which the inner cylinder claw 13 is provided).

Similarly, when the outer cylinder 11 is further inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction), the outer cylinder first claw 40a of the outer cylinder 11 is disengaged from the inner cylinder fourth claw 13d. The outer cylinder third claw 42a locks the inner cylinder third claw 13c before the outer cylinder first claw 40a and the outer cylinder second claw 41a lock the inner cylinder third claw 13c. This is because the outer cylinder first claw 40a needs to move a distance P1 in order to lock the inner cylinder third claw 13c, and the outer cylinder second claw 41a locks the inner cylinder third claw 13c. In order to lock the inner cylinder third claw 13c by the outer cylinder third claw 42a, the distance P1×2/3 needs to be moved by 1/3 of the distance P1. This is because it only needs to be done. Similarly thereafter, the outer cylinder 11 locks the inner cylinder 12 while changing the combination of the inner cylinder claw 13 with which the outer cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a hang. The outer cylinder 11 moves in the insertion direction by a distance of 1/3 of the distance P1.

As a result, the outer cylinder 11 can be gradually moved to the flange 14 side. Therefore, the contact surface 32 of the outer cylinder 11 and the contact surface 17 of the inner cylinder 12 are brought as close as possible to each other, and when the wall is sandwiched between the outer cylinder 11 and the inner cylinder 12, the outer cylinder 11 and the first cylinder 12 are generated. There is an effect that the gap between the wall surface on the one space side and the gap between the inner cylinder 12 and the wall surface on the second space side can be made extremely small.

In addition, the code bushing 10 according to the third embodiment has the same function and effect as the code bushing 10 according to the first embodiment, based on the same components as the code bushing 10 according to the first embodiment.

Next, the code bushing 10 according to the fourth embodiment will be described with reference to FIG. In the cord bushing 10 according to the first embodiment, the outer cylinder 11 is provided with two pairs of claws (the outer cylinder first claw 30 and the outer cylinder second claw 31) at a half of the interval at which the inner cylinder claw 13 is provided. The case was explained. On the other hand, in the code bushing 10 according to the fourth embodiment, the outer cylinder 11 is provided with three pairs of claws (the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42). The distance between the first claw 40 and the outer cylinder second claw 41 in the insertion direction, and the distance between the outer cylinder second claw 41 and the outer cylinder third claw 42 in the insertion direction are 2/ It is provided at intervals of 3.

Hereinafter, the code bushing 10 of the fourth embodiment will be described focusing on differences from the code bushing 10 of the first embodiment, and the same components as those of the code bushing 10 of the first embodiment will be denoted by the same reference numerals. And its description is omitted.

FIG. 9A is a diagram schematically showing a state in which the outer cylinder third claw 42a of the cord bushing 10 according to the fourth embodiment hooks the inner cylinder 12, and FIG. It is the figure which showed typically the state where the outer cylinder 2nd claw 41a has locked the inner cylinder 12, and FIG.9(c) shows the outer cylinder 1st claw 40a which has locked the inner cylinder 12. As shown in FIG. It is the figure which showed the state typically. In these drawings, with respect to the inner cylinder claw 13, the outer cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a are arranged in the left-right direction (direction from the left end of the inner cylinder 12 toward the flange 14). ) Relative to each other, the inner cylinder 12 and the outer cylinder second claw 41a are indicated by solid lines, and the outer cylinder first claw 40a and the outer cylinder first claw 41a at that time are shown. The state with the three claws 42a is shown by an imaginary line.

As shown in FIG. 9A, the outer cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a are provided at different positions in the left and right direction of the outer cylinder 11, and the leftmost one is located at the leftmost position. An outer cylinder first claw 40a, an outer cylinder second claw 41a in the center, and an outer cylinder third claw 42a on the far right are provided.

Although not shown, the outer cylinder 11 is provided with a pair of outer cylinder first claws 40a and 40b at a position symmetrical with respect to the center of the circle of the annular outer cylinder 11 (a pair of outer cylinders). The first claw is referred to as the outer cylinder first claw 40). Then, the outer cylinder 11 is provided with a pair of outer cylinder second pawls 41a and 41b at a position that is deviated from the respective outer cylinder first pawls 40a and 40b in the clockwise direction by about 60 degrees (a pair of outer cylinder second pawls). Is referred to as the outer cylinder second claw 41). Further, the outer cylinder 11 is provided with outer cylinder third claws 42a and 42b at positions that are shifted from the outer cylinder second claws 41a and 41b in the clockwise direction by about 60 degrees (the pair of outer cylinder third claws is referred to as the outer cylinder first claw). 3 claw 42).

In FIG. 9A, the outer cylinder third claw 42a hooks the inner cylinder third claw 13c. At this time, neither the outer cylinder first claw 40a nor the outer cylinder second claw 41a is engaged with any of the inner cylinder claws 13. The distance between the outer cylinder first claw 40a and the outer cylinder second claw 41a in the insertion direction and the distance between the outer cylinder second claw 41a and the outer cylinder third claw 42a in the insertion direction are distance P6. The relationship between the distance P1 and the distance P6, which are the intervals at which the inner cylinder claws 13 are provided, can be expressed by the following equation (6).

P6=P1×2/3 (6)

When the outer cylinder 11 is inserted into the inner cylinder 12 from the state of FIG. 9A, the outer cylinder 11 and the inner cylinder 12 shift to the state of FIG. 9B. That is, the outer cylinder third claw 42a is disengaged from the inner cylinder third claw 13c, and this time the outer cylinder first claw 40a engages the inner cylinder fourth claw 13d. At this time, the outer cylinder 11 moves to the flange 14 side by a distance P7 (1/3 of the interval at which the inner cylinder claw 13 is provided).

When the inner cylinder 12 is inserted into the outer cylinder 11 from the state of FIG. 9B, the outer cylinder 11 and the inner cylinder 12 shift to the state of FIG. 9C. That is, the outer cylinder first claw 40a is disengaged from the inner cylinder fourth claw 13d, and this time the outer cylinder second claw 41a latches the inner cylinder third claw 13c. At this time, the outer cylinder 11 moves to the flange 14 side by the distance P7.

Similarly, when the outer cylinder 11 is further inserted into the inner cylinder 12 (the outer cylinder 11 moves in the insertion direction), the outer cylinder second claw 41a of the outer cylinder 11 is disengaged from the inner cylinder third claw 13c. Then, before the outer cylinder first claw 40a and the outer cylinder second claw 41a engage the inner cylinder third claw 13c and the inner cylinder second claw 13b, the outer cylinder third claw 42a is moved to the inner cylinder second claw 42a. Hook the claw 13b. This is because the outer cylinder first claw 40a needs to move a distance P1×2/3 in order to lock the inner cylinder third claw 13c, and the outer cylinder second claw 41a moves the inner cylinder second claw 13b. In order to hook, it is necessary to move a distance P1, whereas in order to hook the inner cylinder second claw 13b by the outer cylinder third claw 42a, a distance ⅓ of the distance P1 is moved. This is because it only needs to be done. Similarly thereafter, the outer cylinder 11 locks the inner cylinder 12 while changing the combination of the inner cylinder first claw 40a, the outer cylinder second claw 41a, and the outer cylinder third claw 42a. The outer cylinder 11 moves in the insertion direction by a distance ⅓ of the distance P1.

That is, in the fourth embodiment, the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42 have a larger gap in the insertion direction than the third embodiment, but the outer cylinder 11 The distance moved by can be set to 1/3 of P1 as in the third embodiment. This allows the outer cylinder 11 to move in a stepwise manner without narrowing the intervals in the insertion direction of the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42 and the inner cylinder claw 13. The distance can be shortened. Therefore, when the cord bushing 10 is industrially processed, the clearance between the outer cylinder 11 and the wall surface on the first space side, the space on the second space side, regardless of the wall thickness, is not required even if high accuracy is required. The wall can be sandwiched by reducing the gap between the wall surface and the inner cylinder 12. Therefore, it is possible to reduce the number of defective products and increase the production efficiency of the code bushing 10.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the above embodiment, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be inferred. For example, each embodiment may be configured by modifying the embodiment by exchanging a part or plural parts of the configuration of the other embodiment. Further, the numerical values mentioned in the above embodiments are examples, and it is naturally possible to adopt other numerical values.

In each of the above-described embodiments, by supporting the contact surface 32 of the outer cylinder 11 by the support member 34, it is possible to make elastic contact with the wall surface on the first space side, but the present invention is not limited to this. For example, instead of the contact surface 32 of the outer cylinder 11, the contact surface 17 of the inner cylinder 12 may be supported by an elastically deformable member so that it can elastically contact the wall surface on the first space side. .. Further, both the outer cylinder 11 and the inner cylinder 12 may be elastically contacted with the wall surface.

In each of the above-described embodiments, the inner cylinder 12 is provided with eight inner cylinder claws 13 and the outer cylinder 11 is provided with two or three pairs of outer cylinder claws, but the number of claws is not limited to this. .. For example, when used for a thick wall, the length of the cylinder 16 of the inner cylinder 12 in the left-right direction may be increased and the number of inner cylinder claws 13 may be increased. Further, the number of claws on the inner cylinder 12 and the outer cylinder 11 may be exchanged. For example, the outer cylinder 11 may be provided with eight pairs of claws, and the inner cylinder 12 may be provided with two claws.

In each of the above-described embodiments, the inner cylinder claw 13 is provided in the cylinder 16 in an annular shape. The pair of outer cylinder first claws 30 and the pair of outer cylinder second claws 31 are provided so as to project from the inner peripheral surface of the outer cylinder 11, but the shapes of these claws are not limited to this. Not something. The outer cylinder claws do not need to be paired, and may be annularly provided on the inner peripheral surface of the outer cylinder 11, for example.

In each of the above embodiments, no means for releasing the hooked state is provided, but for example, a cut may be provided in a part of the circumference of the outer cylinder 11 to change the inner diameter of the outer cylinder 11. It may be configured so that the outer cylinder 11 can be unlocked from the inner cylinder 12 by widening the inner diameter.

In each of the above-described embodiments, a pair of claws (a first claw of the outer cylinder, a second claw of the outer cylinder, and a third claw of the outer cylinder) are provided so as to be point-symmetric with respect to the center of the outer cylinder 11. It is not limited to. For example, the number of nails may be at least one. However, it is preferable that the number of nails is plural. When the number of claws is plural, they may be arranged on the concentric circles of the outer cylinder 11. At this time, it is more preferable to arrange a plurality of claws at equal intervals on the concentric circle of the center of the outer cylinder 11.

In each of the above embodiments, the inner cylinder claw 13 of the inner cylinder 12 is provided in an annular shape, but the invention is not limited to this. For example, the outer cylinder first claw 30, the outer cylinder second claw 31, the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42 may be provided with claws only at the portions to be engaged. Good. In this case, when the outer cylinder 11 is rotated in the circumferential direction, the outer cylinder first claw 30, the outer cylinder second claw 31, the outer cylinder first claw 40, the outer cylinder second claw 41, and the outer cylinder third claw 42. Any of the above may be configured so that there is a position where the inner cylinder claw 13 is not locked. With such a configuration, the outer cylinder 11 can keep the inner cylinder 12 hooked, while the outer cylinder 11 can be rotated in the circumferential direction to release the hooked state. There is an effect that the outer cylinder 11 can be easily removed from the inner cylinder 12.

In each of the above-described embodiments, the outer cylinder 11 is arranged on the left side of the wall and the inner cylinder 12 is arranged on the right side of the wall, but the invention is not limited to this. For example, the outer cylinder 11 may be arranged on the right side of the wall and the inner cylinder 12 may be arranged on the left side of the wall. In that case, the space on the right side of the wall becomes the first space, and the space on the left side of the wall becomes the second space.

10 cord bushing 11 outer cylinder 12 inner cylinder 13 inner cylinder claw (second locking means)
17 Contact surface (second contact means)
30 Outer cylinder first claw (a part of first contact means)
31 Outer cylinder 2nd claw (a part of 1st contact means)
32 contact surface (first contact means)
34 Support member (elastic means)

Claims (4)

A cord bushing that is attached in a tubular shape to a hole provided in a wall and that pulls out the cord between a first space and a second space partitioned by the wall by passing the cord through the cylinder.
An outer cylinder having a first contact means for contacting one surface of the wall,
It has a second contact means for contacting the other surface of the wall, and is formed to be insertable into the outer cylinder so that the wall is clamped by the first contact means and the second contact means. With an inner cylinder,
The outer cylinder includes a plurality of first hooking means,
The inner cylinder is provided with a plurality of second hooking means that are paired with one of the first hooking means and can hook the outer cylinder and the inner cylinder in a direction opposite to the insertion direction.
The cord bushing changes the combination of the first hooking means and the second hooking means for hooking the inner tube relative to the outer tube, while changing the combination of the first hooking means and the second hooking means. The distance between the contact means and the second contact means is narrowed so that the wall can be held.
When at least one pair of the first hooking means and the second hooking means is hooked, the second hooking means and the non-hooking first hooking means are present, and the non-hooking first The distance from the hooking means to the first hooking means and the second hooking means on the side of the second contact means capable of hooking is the distance from the hooked first hooking means to the first hooking means. There is at least one non-engagement first hooking means that is shorter than the distance to the non-hanging second hooking means on the side of the second contact means capable of hooking. A cord bushing having a stopping means and a second hanging means. At least one of the first contact means and the second contact means comprises an elastic means,
The elastic means is for elastically deforming by contacting the wall when the wall is sandwiched by the first contact means and the second contact means.
The elastic means may be any combination of the first hooking means and the second hooking means in which the wall is held by the first contacting means and the second contacting means. The cord bushing according to claim 1, wherein the elastic means is configured to elastically deform in that state. The inner cylinder is
Penetrating from the second space to a hole provided in the wall,
When the second contact means is in contact with the wall on the second space side, the second hooking means is exposed to the first space side,
The outer cylinder is
The inner cylinder is relatively inserted in the first space side,
The said wall is clamped by the said 2nd contact means which contacted the said wall of the said 2nd space side, and the said 1st contact means which contacted the said wall of the said 1st space side. Or the code bushing described in 2. The first hooking means is
The cord bushing according to any one of claims 1 to 3, wherein the other first hooking means is configured to be non-existent on a straight line in the insertion direction passing through the one first hooking means. ..

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