JP2008017544A - Telescopic joint box - Google Patents

Abstract

An object of the present invention is to provide a telescopic joint box that can be covered with a single hand when an operator climbs a ladder to cover the connection bundle with the joint box.
SOLUTION: Between the first box element and the second box element, there is provided a pair of engaging means composed of a concave portion and a convex portion, and the setting of the engaging force of the engaging means is the first box element. Even when a resistance force is applied to the wire bundle, the positional relationship of the second box element with respect to the first box element is constant and the first box element is passed from the second box element through the engaging means. Is set so that a transmission force larger than the resistance force can be transmitted.
[Selection] Figure 1

Description

  The present invention relates to a joint box for protecting a wire bundle formed when a plurality of electric wires are connected to each other, and more particularly to a joint box that can be expanded and contracted.

2. Description of the Related Art Conventionally, as a joint box for insulatingly covering a bundle of wires formed by bundling ends of a plurality of electric wires in a branch wiring, for example, one shown in FIG. 11 is known (see Patent Document 1).
This joint box is positioned around the wire bundle 8, the inner wall member 2 constituting the wire bundle storage space 5 inside, the rear end face member 3 positioned on the head side of the wire bundle 8, and the wall member 2. Is provided with a front opening 4 for inserting the connection bundle 8 in the direction of the end face member 3 in the connection bundle storage space 5 surrounded by. Further, the peripheral wall member 2 includes a front half box element (also referred to as a first box element) 1 -A including a peripheral wall member 11 positioned around the connection bundle 8 and the front opening 4, and around the connection bundle 8. It is comprised from two members, the latter half box element 1-B (it is also called 2nd box element) provided with the surrounding wall member 21 to be located, and the rear end surface member 3 to be located on the head side 8a of the wire bundle 8. These box elements 1-A and 1-B are combined with the peripheral wall members 11 and 21 in the form of a concentric double cylinder to form an integrated joint box A. From the opening 4, the space 5 is placed. The length L between the opening 4 and the end face member 3 is expanded or contracted to correspond to the size of the wire bundle 8 inserted into the cable, and the length of the storage space 5 is made to correspond to the size of the wire bundle 8. The double cylindrical portions 29 of the peripheral wall members 11 and 21 are brought into contact with each other so that they can be expanded and contracted in the axial direction when pushed and pulled by hand.

Japanese Patent No. 3765842

In this conventional joint box, when the worker climbs the ladder and works to put the joint box on the connection bundle fixed to the construction material at the high place (for example, the beam behind the ceiling), the worker Before climbing the ladder, hold the box elements 1-A and 1-B in advance with your right and left hands, respectively, and pull to extend the length L between the opening 4 and the end face member 3 (extend from L2 to L1). (See FIG. 12A)). Next, climb to a height where you can work on the ladder. Then, as shown in FIG. 12B, the extended joint box A is held with one hand 50 and covered from the top side of the connection bundle 8. In this case, if it is possible to finish the covering without any trouble, for example, in the following case, for example, the blocking piece 16 of the opening 4 hits the wire bundle 8 and becomes a resistance, and the first box element 1-A does not advance, When only the 2-box element 1-B advances in the direction of the arrow 70, the length of the joint box A becomes the shortest reduced state (FIG. 12C). When a pressing force in the direction of arrow 70 is further applied in this state, the blocking piece 16 of the opening 4 is pushed by the wire bundle 8 to open in the direction of arrow 71, and the joint box A advances in the direction of arrow 70. This advancement stops when the head 8 a of the wire bundle 8 hits the end face member 3.
In this state, as shown in FIG. 12 (D), the lower side 8b of the connection bundle is exposed without being accommodated in the joint box, and the work for covering the connection bundle with one hand cannot be completed. There was an upper problem.

  Therefore, the operator must work with both hands in order to cover the entire connection bundle 8 with the joint box A. In this case, the operator has to move both hands away from the ladder, and the posture becomes unstable, and there is a problem that the operator may fall from a high ladder.

The purpose of this application is not only to cover the wire bundle, but also to cover the insulation, as well as to adjust the length of the storage space, so that one kind of joint box for both large and small wire bundles It is intended to provide a telescopic joint box that can be covered correspondingly.
Another purpose is that when the joint box is stored in the warehouse, the length between the opening and the end face member in the joint box can be reduced to make it smaller, and the expansion and contraction that can make the stock storage space compact It is intended to provide a flexible joint box. Furthermore, the present invention intends to provide a telescopic joint box that can be transported in a small volume even when the joint box is transported.
Another purpose is to complete the covering work with one hand when the worker climbs the ladder to cover the connection bundle fixed to the height of the construction material (eg ceiling beam). It is intended to provide a telescopic joint box that can be extended. This means that even when an operator climbs an unstable ladder as described above, the worker holds the ladder with one hand to ensure safety and puts it safely with the remaining one hand. It is intended to provide a telescopic joint box that can work.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

  The telescopic joint box 1 in the present invention is a joint box 1 for insulatingly covering a wire bundle 8 formed by bundling the ends of a plurality of electric wires 7... The peripheral wall member 2 that forms the connection bundle storage space 5 on the inside, the rear end face member 3 that is positioned on the head side of the connection bundle 8, and the connection bundle storage space 5 that is surrounded by the peripheral wall member 2. Are provided with a front opening 4 for inserting the connection bundle 8 toward the end face member 3, and the peripheral wall member 2 includes a peripheral wall member 11 positioned around the connection bundle 8 and the front opening. 2 of the 1st box element 10 provided with 4 and the 2nd box element 20 provided with the peripheral wall member 21 located in the circumference | surroundings of the connection bundle 8, and the rear end surface member 3 located in the head side 8a of the connection bundle 8. Composed of parts, these The box elements 10 and 20 combine the above peripheral wall members 11 and 21 into a concentric double cylinder to form an integral joint box 1, and the connection bundle 8 inserted into the storage space 5 from the opening 4. The length L between the opening 4 and the end face member 3 can be expanded and contracted in accordance with the size of the space 4 so that the length of the storage space 5 can be adjusted according to the size of the wire bundle 8. In the telescopic joint box 1 in which the double cylindrical portions 29 of the peripheral wall members 11 and 21 are brought into contact with each other so that they can expand and contract in the axial direction when pushed and pulled by hand. Between the 1 box element 10 and the 2nd box element 20, it has a pair of engaging means 30 comprised by the recessed part 31 and the convex part 34, and the setting of the engaging force C of the said engaging means 30 is 1st. Hold the two-box element 20 with one hand, the first box When the element 10 is put on the wire bundle 8, the positional relationship of the second box element 20 with respect to the first box element 10 is constant even when the first box element 10 receives the resistance R due to the presence of the wire bundle 8. In this state, the second box element 20 is set so that the transmission force R1 larger than the resistance force R can be transmitted from the second box element 20 to the first box element 10 via the engagement means 30. The engagement force C of the engagement means 30 is set such that when the second box element 20 is slid relative to the first box element 10, the pressing force T greater than the transmission force R1 is applied to the second box element 20. The second box element 20 is set so as to be slidable in the axial direction relative to the first box element 10 by adding.

  Preferably, the joint box 1 for insulatingly covering the wire bundle 8 formed by bundling the ends of the plurality of electric wires 7... 7 in the branch wiring, is located around the wire bundle 8, Is the peripheral wall member 2 constituting the connection bundle storage space 5, the rear end face member 3 positioned on the head side of the connection bundle 8, and the connection bundle 8 in the connection bundle storage space 5 surrounded by the peripheral wall member 2. A first box provided with a front opening 4 for insertion toward the direction of the member 3, and the peripheral wall member 2 further comprising a peripheral wall member 11 positioned around the wire bundle 8 and the front opening 4. It is composed of two members, the element 10 and a second box element 20 including a peripheral wall member 21 positioned around the wire bundle 8 and a rear end surface member 3 positioned on the head side 8a of the wire bundle 8, Box elements 10 and 20 are both The peripheral wall members 11, 21 are combined into a concentric double cylinder to form an integral joint box 1, which corresponds to the size of the wire bundle 8 inserted from the opening 4 into the storage space 5. The length L of the space 5 between the opening 4 and the end face member 3 can be expanded and contracted so that the length of the space 5 can be adjusted in accordance with the size of the wire bundle 8. In the expandable joint box 1 which is brought into contact with each other so that the double cylindrical portion 29 can be expanded and contracted in the axial direction when pushed and pulled by hand, the opening 4 of the first box element 10 is provided. On the inner side, the base portion is fixed to the opening 4, the tip protrudes toward the center position of the first box element 10, and the size of the cross section is such that it can be freely bent flexibly. And a blocking piece 16 for pulling out. Between the 1 box element 10 and the 2nd box element 20, it has a pair of engaging means 30 comprised by the recessed part 31 and the convex part 34, and the setting of the engaging force C of the said engaging means 30 is 1st. When the first box element 10 is put on the connection bundle 8 by holding the two box elements 20 with one hand, the blocking piece 16 comes into contact with the connection bundle 8 due to the presence of the connection bundle 8. Even when the resistance force R is received, the positional relationship of the second box element 20 with respect to the first box element 10 is constant, and the second box element 20 is engaged with the first box element 10 via the engaging means 30. The transmission force R1 larger than the resistance force R is transmitted, and the blocking piece 16 is pushed and bent by the connection bundle 8 so that the first box element 10 can be advanced. Yes In addition, the setting of the engagement force C of the engagement means 30 is such that when the second box element 20 is slid with respect to the first box element 10, it is more than the transmission force R1 with respect to the second box element 20. What is necessary is just to set so that the 2nd box element 20 can be slidably reduced toward an axial center direction with respect to the 1st box element 10 by applying the big pressing force T. FIG.

    Further preferably, the first box element is provided with guide means including a pair of guide grooves parallel to the axial direction of the joint box and guide pieces on the sides of the concave portion and the convex portion of the engaging means. On the other hand, what is necessary is just to prevent the second box element from returning in the circumferential direction with respect to the first box element when the second box element is expanded and contracted.

    Preferably, the recess 31 in the engaging means 30 is provided in a state of being continuous over the entire circumferential direction of the corresponding peripheral wall, and even if the relative angle in the circumferential direction of the second box element 20 with respect to the first box element 10 changes, It is sufficient that the relative engagement is obtained.

    Preferably, the pair of engaging means 30 constituted by the concave portion 31 and the convex portion 34 are respectively provided at peripheral wall positions separated by 180 ° of the joint box 1, and when the positions are pressed from the outer periphery, the concave portion 31 and the convex portion 34 are provided. What is necessary is just to make the said engaging force weaken, when the engaging force with the convex part 34 becomes strong and presses an outer peripheral wall in the position which moved 90 degrees from the said position.

  As described above, according to the present invention, the second box element slides in the axial direction with respect to the first box element so that the second box element can be expanded and contracted. This has the advantage that it can be covered with a single type of joint box for both simple and small bundles.

  Furthermore, when the joint box is stored in a warehouse, the present invention can reduce the length between the opening and the end face member of the joint box to reduce the bulk, so the stock storage space can be made compact and the storage cost can be reduced. There is a feature that can be suppressed. Furthermore, the fact that it can be made small in this way is advantageous in that the volume occupied can be reduced even when the joint box is transported.

Further, according to the present invention, when an operator climbs a ladder to work to put a joint box on a connection bundle fixed to a height of a construction material (for example, a beam on a ceiling), the worker extends the work. Setting the engagement force even if the first box element is subjected to resistance by the presence of the connection bundle when the second box element of the joint box is held with one hand and the first box element is put on the connection bundle. Is set so that a large pressing force (a force larger than the resistance force) applied to the second box element can be transmitted to the first box element via the engaging means, and the joint box is in the extended state. Since it can be put on the wire bundle while maintaining
An operator can complete the covering work only by holding the second box element with one hand and pushing it into the bundle of wires.
This means that even when an operator climbs an unstable ladder as described above, the worker holds the ladder with one hand to ensure safety and puts it safely with the remaining one hand. There is a safety effect that allows you to work.

Embodiments of the present invention will be described below with reference to FIGS.
FIG. 1 (A) is for explaining the relationship between the wire bundle 8 fixed to the construction material 6 and the joint box 1 placed on the periphery thereof. The joint box 1 is shown in FIG. 1 (B). It is the fragmentary sectional view which represented the connection bundle | flux of storage space by cut | disconnecting in the AA line position.
FIG. 1B is a cross-sectional view taken along the line BB in FIG. 1A for explaining the engaged state of the engaging means 30.
FIG. 1C is a cross-sectional view taken along the line CC of FIG. 1A for explaining a contact state between the first box element 10 and the second box element 20.
FIG. 2A is a perspective view illustrating only the second box element when viewed from the lower right direction in FIG. 1A for explaining the second box element 20.
2B is a perspective view illustrating only the first box element when viewed from the upper right direction in FIG. 1A (the blocking piece 16 is illustrated). Omitted).
FIG. 3 is a view for explaining the blocking piece 16 provided in the opening 4 of the first box element 10 and is a view showing the direction of the symbol III in FIG. 2 (B).
4 and 5 are for explaining the operation of covering the joint bundle 1 with the connection bundle 8 fixed to the construction material 6, and FIG. 4 is a schematic diagram showing the case of a large connection bundle. FIG. 3 is a schematic diagram showing a case of a small wire bundle.
FIG. 6 is for explaining an example in which the disposition position of the engaging means is different from the joint box shown in FIGS. 1 to 5. Specifically, the concave portion in the engaging means is formed in the second box element 20. FIG. 5 is a cross-sectional view for explaining an example in which convex portions are provided in the first box element 10.
7 and 8 are for explaining an example in which the configuration relating to the engaging means is different from the joint box shown in FIGS.
FIG. 9 is for explaining an example in which the structure relating to the guide means is different from the joint box shown in FIGS. 1 to 5, (A) is a front view of the first box element, and (B) is the first view. FIG. 8B is a schematic cross-sectional view taken along the line BB in FIG. 7A in a state where the one box element and the second box element are combined (partially omitted from the first box element and the second box element).
FIG. 10 is for explaining an example in which the structure relating to the guide means is different from the joint box shown in FIGS.

  In the figure, reference numeral 8 denotes a wire bundle formed by bundling the ends of a plurality of electric wires 7... 7 in a branch wiring with a connector 9. Installed).

1 is a joint box for insulatingly covering the wire bundle 8. In the joint box 1, reference numeral 2 denotes a peripheral member positioned around the connection bundle 8, and a connection bundle storage space 5 is formed inside.
3 is a rear end face member positioned on the head side of the connection bundle 8, 4 is a front opening for inserting the connection bundle 8 toward the end face member 3 in the connection bundle storage space 5 surrounded by the peripheral wall member 2. Indicates the part. The joint box 1 is shaped using a known insulating material such as a synthetic resin material. For example, vinyl chloride may be used.
The peripheral member 2 in the joint box 1 is composed of two members, a first box element 10 and a second box element 20, as shown in FIG.

Next, the first box element 10 will be described. The first box element 10 includes a peripheral wall member positioned around the wire bundle and the front opening. Specifically, in the first box element 10, reference numeral 11 denotes a cylindrical peripheral wall member for positioning around the wire bundle 8. The opening 4 is provided on the lower edge 11 c side of the peripheral wall member 11. The upper edge 11d side is opened so that the storage space 5 is formed inside in a state (see FIG. 1) combined with a second box element 20 described later.
Reference numeral 16 denotes a known pull-out blocking piece for preventing the joint box placed on the wire bundle from being inadvertently pulled out, and a plurality of pieces are projected radially from the inner peripheral surface 11b of the peripheral wall member 11 as shown in the figure. It is set up. The blocking piece 16 is elastically operated on the base portion 16a side of the blocking piece 16. The cutout hole 17 is for increasing the elasticity of the blocking piece 16 and has a smaller cross section of the base portion 16a. Reference numeral 18 denotes a flange formed on the tip portion 16b, which is elastically engaged with the electric wire 7 in the connection bundle 8 to prevent the joint box 1 from being inadvertently pulled out (FIG. 1). (See (A)).
Reference numeral 19 denotes a mounting portion for fixing the joint box 1 to the building material 6 as necessary. As is widely known, the mounting portion 19 includes a screw hole 19a, which can be used for fixing by passing a screw therethrough. It is like that.

Next, the second box element 20 will be described. The second box element 20 includes a peripheral wall member positioned around the connection bundle and a rear end surface member positioned on the head side of the connection bundle. Specifically, in the second box element 20, reference numeral 21 denotes a cylindrical peripheral wall member for positioning around the wire bundle 8, and the end face member 3 is surrounded by the peripheral wall member 21 on the upper end side 11 d. It is provided integrally so as to block one surface of the space 23. The lower edge 21c side is opened so that the storage space 5 is formed on the inner side in a state combined with the first box element 10 (see FIG. 1). Reference numeral 25 denotes a drainage hole protruding from the end face member 3. When the joint box 1 is installed to the connection bundle 8 in which the head 8 a is fixed downward with respect to the construction material 6, a protruding portion is provided as necessary. (For example, the part of the dashed-dotted line 25a) is cut | disconnected, and the sewage, dust, etc. which penetrate | invaded from the opening part 4 are excluded without staying (refer FIG. 1).
In addition, although the said 1st box element 10 and the 2nd box element 20 illustrated and demonstrated the thing with a circular cross-sectional shape in FIG.1 (B), cross-sectional shape that the indwelling space 5 is formed inside May be formed into an ellipse or a polygon.

As shown in FIG. 1, the first box element 10 and the second box element 20 are configured such that the peripheral wall members 11 and 21 are combined into a concentric double cylinder to form an integral joint box 1. It is. The contact state between the double cylindrical portions 29 of the peripheral wall members 11 and 21 in the box elements 10 and 20 is relatively slidable.
In addition, the double cylindrical part 29 expands / contracts the length L between the opening part 4 and the end surface member 3 in accordance with the size of the wire bundle 8 inserted from the opening part 4 into the storage space 5 (long). L1 to L2) so that the length of the storage space 5 can be adjusted according to the size of the wire bundle 8, so that it can be expanded and contracted in the axial direction when pushed and pulled by hand. As long as they are in contact with each other, a slight gap may be formed between the peripheral wall members 11 and 21.

Next, the engaging means provided between the first box element 10 and the second box element 20 will be described.
The engaging means 30 is configured by a pair of a concave portion 31 provided in the first box element 10 and a convex portion 34 provided in the second box element 20 (see FIGS. 1 and 2).
The positions where the recesses 31 are arranged are formed at two positions on the outer peripheral surface 11a side of the peripheral wall member 11 of the first box element 10 that face each other. Further, a plurality of recesses 31 are arranged step by step at appropriate intervals from the upper edge 11d of the peripheral wall member 11 in the axial direction. The recessed portion 31 is formed so as to be recessed from the outer peripheral surface 11 a of the peripheral wall member 11. Reference numeral 32 denotes a protrusion between the plurality of recesses 31. The cross-sectional shape of the protrusion 32a located at the top (upper edge 11d) of the protrusions 32 is such that the lower side 32b is inclined slightly downward toward the outer periphery as shown in FIG. Is formed. The tip 32c of the protrusion 32 is configured not to protrude from the outer peripheral surface 11a of the peripheral wall member 11. This can close the space between the outer peripheral surface 11a of the peripheral wall member 11 and the inner peripheral surface 21b of the peripheral wall member 21 in the combined state of both the box elements 10 and 20 (see FIG. 1A). In this case, dust and moisture can be prevented from entering the joint box.
The protrusions 34 are arranged at two positions at opposite positions on the inner peripheral surface 21 b side of the peripheral wall member 21 of the second box element 20. The shape of the convex portion 34 is formed corresponding to the surface shape of the concave portion 31 as shown in FIG. 1A so that the state engaged with the concave portion 31 can be maintained. Further, the upper side 34a of the convex portion 34 has a corresponding shape so as to be engaged with the lower side 32b of the protruding portion 32a, and the second box element 20 is in a state where the first box element 10 and the second box element 20 are combined. The first box element 10 is prevented from coming off.
Reference numeral 33 denotes a cut formed on both sides of the convex portion 34, and the convex portion 34 is elastically moved in the directions of arrows 60 and 63 in FIG.

The engagement force C of the engagement means 30 is set such that when the second box element 20 is held with one hand and the first box element 10 is put on the connection bundle 8, the first box element 10 is present in the connection bundle 8. Even when the resistance force R is received by the state (for example, the state of FIG. 4C), the positional relationship of the second box element 20 with respect to the first box element 10 is constant, and the engagement means from the second box element 20 The transmission force R1 larger than the resistance force R can be transmitted to the first box element 10 via 30.
Moreover, when the second box element 20 is slid with respect to the first box element 10, the setting of the engagement force C of the engagement means 30 is greater than the transmission force R1 with respect to the second box element 20. By applying a pressing force T, the second box element 20 is set so as to be slidable in the axial direction relative to the first box element 10 (state shown in FIG. 5D).

Next, the guide means will be described. A guide means comprising a pair of guide grooves parallel to the axial direction of the joint box and a guide piece is provided on each side of the concave portion and the convex portion in the engaging means, and the second means with respect to the first box element. When the box element is expanded and contracted, the second box element is prevented from returning in the circumferential direction with respect to the first box element. Specifically, the guide means 36 includes a guide groove 36 a formed in the peripheral wall member 11 of the first box element 10 and a guide piece 36 b formed in the peripheral wall member 21 of the second box element 20. The guide groove 36a is formed in a groove shape on both sides of the recess 31 as shown in the figure. The guide piece 36b has a corresponding shape so that it fits into the guide groove 36a and advances and retreats along the guide groove 36a in a state where the two box elements 10 and 20 are combined (see FIGS. 1B and 1C). It is. When the second box element 20 is expanded and contracted with respect to the first box element 10, lateral shaking and inclination are prevented, and the second box element 20 is expanded and contracted straight in the axial direction.
Next, a description will be given of the guide means 37 provided 90 ° apart from each of the guide means 36 and 36. The guide means 37 includes a guide groove 37 a formed in the peripheral wall member 11 of the first box element 10 and a guide piece 37 b formed in the peripheral wall member 21 of the second box element 20. The guide groove 37a and the guide piece 37b have shapes corresponding to each other as shown in the figure, and the guide piece 37b advances and retreats along the guide groove 37a.

The operation of covering the wire bundle with the above configuration will be described with reference to FIG.
When covering a bulky bundle of wires, it is as follows.
Before ascending the ladder, the operator holds the box elements 10 and 12 in advance with the right hand 50 and the left hand 50, respectively, and pulls the length L between the opening 4 and the end face member 3 (L1). FIG. 4 (A))). Next, climb to a height where you can work on the ladder.
Then, as shown in FIG. 4B, the second box element 20 in the extended joint box 1 is held with one hand 50 and covered from the head side 8a of the bundled bundle 8, and the pressing force T in the direction of arrow 70 is applied. Press. Then, the blocking piece 16 of the opening 4 hits the wire bundle 8 and the first box element 10 receives the resistance force R.
Subsequently, when a large pressing force T is applied to the second box element 20 in the direction of the first box element 10, the transmission force R1 larger than the resistance force R is caused by the pressing force T via the engaging means 30. Is transmitted to the first box element 10. Then, the blocking piece 16 of the first box element 10 is pushed by the wire bundle 8 and opens in the direction of the arrow 71, and the joint box 1 advances in the direction of the arrow 70 (see FIG. 4C). The operator proceeds to a state where the head 8a of the wire bundle 8 is in contact with the end face member 3 (see FIG. 4D), and the covering operation of the joint box 1 with respect to the bulky wire bundle 8 is completed.
Thus, in the covering operation, even when the first box element 10 receives the resistance force R, the engagement means 30 overcomes the resistance force R and maintains the engagement state, and the double cylinder portion 29 remains in the extended state. Thus, the covering operation for the bundled bundle can be completed with only one hand 50 (the positional relationship of the second box element 20 with respect to the first box element 10 remains constant).

Next, the case of covering a small bundle of wires will be described with reference to FIG.
When the same operation as the case of covering the bulky connection bundle described above is performed, the joint box 1 can be covered over the connection bundle 8 as shown in FIGS. 5 (A), (B), and (C). it can. 5C, when a large pressing force T is applied to the second box element 20 in the direction of the first box element 10, the first box element 10 is fixed. It hits the surface and receives the force F of the fixed object.
Then, the pressing force T applied to the engagement means second box element 20 is transmitted to the engagement means 30, the engagement means 30 is disengaged, and the second box element 20 is centered with respect to the first box element 10. The double cylinder portion 29 slides in the direction (arrow 70) so as to shrink. As shown in FIG. 5D, it is possible to cope with a small bundle of wires.

Next, in handling the joint box 1, when the second box element 20 is pushed toward the floor surface 6a from the state shown in FIG. 4C, the degree of engagement in the engagement means 30 is increased. When a force is applied in the direction of the arrow (opposite direction: arrow 60) in FIG. 1 (B) using the index finger, the elastic second box element 20 has an arrow ( Opposing direction: arrow 61) swells (the cross-sectional shape of FIG. 1B is slightly elliptical), and the degree of engagement of the concave portion 31 and the convex portion 34 in the engaging means is increased.
When it is desired to weaken the degree of engagement in the engagement means 30 and slide the second box element 20 out of the first box element 10 in the pulling-out direction, the thumb and index finger are moved 90 degrees, as shown in FIG. When a force is applied in the direction of the arrow (opposite direction: arrow 62), the degree of engagement between the concave portion 31 and the convex portion 34 in the engaging means 30 becomes shallow (weak), and the pulling operation can be performed easily.
The acupressure position may be displayed on the outer surface so that the position where pressure is applied with the finger can be seen from the outside.

Next, FIG. 7 which shows an example different from the engaging means of FIGS. 1-5 in the point of a structure of an engaging means is demonstrated.
7 is intended to provide a joint box that can be combined at any position in the circumferential direction when the first box element 10 and the second box element 20 are combined in a concentric double cylinder shape. To do.
The positions of the recesses 31 in the engaging means 30 are formed on the entire circumference of the peripheral wall member 11 of the first box element 10 on the outer peripheral surface 11a side. Further, a plurality of recesses 31 are arranged step by step at appropriate intervals from the upper edge 11d of the peripheral wall member 11 in the axial direction. The lower side 32b of the protrusion 32a located at the top (upper edge 11d) of the protrusions 32 is formed so as to protrude substantially horizontally toward the outer peripheral direction (see FIG. 7C).
The protrusions 34 in the engaging means 30 are arranged at two locations at positions facing the peripheral wall member 21 of the second box element 20. The convex portion 34 is formed to project from the lower edge 21c of the peripheral wall member 21 so as to move elastically in the directions of arrows 60 and 63. The upper side 34a of the convex part 34 has a corresponding shape so as to be engaged with the lower side 32b of the protruding part 32a, and the second box element 20 is the first box element 20 in a state where the first box element 10 and the second box element 20 are combined. The box element 10 is prevented from coming off.
Even when the engaging means is configured as described above, the same action as that of the engaging means shown in FIGS. Furthermore, as described above, when the two box elements 10 and 20 are combined in a concentric double cylinder shape, they can be combined at any position in the circumferential direction.
In FIG. 6, parts that are considered to have the same or equivalent configuration in function, property, characteristics, or the like as those in FIGS. 1 to 5 described above are denoted by the same reference numerals as those in FIGS. 1 to 5. Description is omitted. (Also, in the subsequent figures, the same reference numerals are used for the same concept, and the duplicated description is omitted.)

Next, FIG. 8 which shows an example different from the engaging means of FIGS. 1-5 in the point of a structure of an engaging means is demonstrated.
The engaging means 30 in FIG. 8 increases the degree of force required to slide in a contractible manner toward the axial direction of the second box element 20 with respect to the first box element 10, and inadvertently reduces the force. It is intended to provide a joint box that can prevent the above-mentioned problem more strongly.
In the figure, reference numeral 32 denotes protrusions protruding from the outer peripheral surface 11a of the peripheral wall member 11 of the first box element 10, and the arrangement thereof is arranged at four positions at intervals of 90 degrees in the circumferential direction of the peripheral wall member 11. A plurality are arranged step by step at an appropriate interval from the edge 11d in the axial direction. The protrusion 32a is formed on the upper edge 11d over the entire circumference of the peripheral wall member, and the cross-sectional shape of the protrusion 32a is such that the lower side 32b is formed substantially horizontally toward the outer peripheral direction.
The recess 31 in the engaging means 30 is formed between the plurality of protrusions 32.
On the other hand, the arrangement position of the convex portion 34 in the engaging means 30 is formed over the entire circumference of the peripheral wall member 21 of the second box element 20 (see FIG. 8A). The upper surface 34a of the protrusion 34 has a corresponding shape so as to be engaged with the lower surface 32b of the protrusion 32a, and the second box element 20 is the first box element 20 in a state where the first box element 10 and the second box element 20 are combined. The box element 10 is prevented from coming off. Further, the lower surface 34b of the convex portion 34 is formed substantially horizontally so as to correspond to the upper surface of the projection 32, and slides in a contractible manner toward the axial direction of the second box element 20 relative to the first box element 10. The degree of power required for this is strengthened.
Even when the engaging means is configured as described above, the same action as that of the engaging means shown in FIGS. Further, it is possible to more strongly prevent the second box element 20 from being inadvertently reduced with respect to the first box element 10 after being covered with the connection bundle.

Next, FIG. 9 which shows an example which differs in the point of a structure from the guide means of FIGS. 1-5 is demonstrated.
The guide means 37 of FIG. 9 is intended to provide a joint box that can assist the engaging force by the engaging means 30 and increase the degree of the engaging force.
The guide means 37 includes a stop hole 40 formed in the peripheral wall member 11 of the first box element 10 and a stop portion 41 formed in the peripheral wall member 21 of the second box element 20. The stop hole 40 and the stop portion 41 have shapes corresponding to each other as shown in the drawing, and the stop portion 41 advances and retreats along the stop hole 40 in a stepwise manner.
Even when the guide means is configured in this manner, the same action as the guide means of FIGS. Furthermore, the degree of engagement force can be further increased by assisting the engagement force by the engagement means 30.

Next, FIG. 10 which shows an example which differs from the joint box of FIGS. 1-5 in the point which does not form a guide means is demonstrated.
The joint box shown in FIG. 10 has the first box element 10 and the second box element 20 combined as shown before use so that the two box elements 10 and 20 can be inserted and removed freely. When the 2nd box element 20 is made into the expansion | extension state with respect to the 1 box element 10, it intends to provide the joint box which can be extended | stretched with a light force.

Next, in the joint box of FIGS. 1-5, in the point which does not provide the blocking piece 16 in the opening part 4 of a joint box, and in the covering operation | work of the joint box with respect to the connection bundle demonstrated using FIG. 4, FIG. An example different from the resistance force R received by the first box element 10 will be described with reference to FIG.
In the figure, 8 indicates the presence of a wire bundle that is spread like a petal.
When the connection bundle 8 enters the storage space 5 in the process of covering work, the connection bundle 8 comes into contact with the inner peripheral surface 11b of the peripheral wall member of the first box element 10 and is rubbed. Receives resistance R.
Even in such a case, the joint box 1 can complete the covering work on the wire bundle with only one hand 50.
Furthermore, even when the covering work that spreads like a petal is gathered with one hand and the second box element 20 in the joint box is covered with the other hand, the covering work on the connecting bundle can be completed smoothly. it can.

In FIG. 1, the peripheral wall member 21 of the second box element is positioned on the outside and the peripheral wall member 11 of the first box element is positioned on the inside. However, in reverse, that is, the peripheral wall member 11 is It may be located outside, the peripheral wall member 21 may be located inside, and various engaging means 30 (including the engaging means 30 in FIGS. 1 to 10) may be provided between them.
Further, in FIG. 1, the concave portion 31 is disposed on the peripheral wall member 11 of the first box element 10 and the convex portion 34 is disposed on the second box element 20. Although the example arrange | positioned in the surrounding wall member 21 was demonstrated, you may arrange | position these relatively and reversely. That is, the concave portion 31 may be disposed on the peripheral wall member 21 of the second box element 20 and the convex portion 34 may be disposed on the peripheral wall member 11 of the first box element 10 (see FIG. 6).

(A) is a partial cross-sectional view showing the connection bundle of the storage space by cutting the joint box at the AA line position in FIG. 1 (B), (B) is a cross-sectional view along the BB line in (A), (C) is the CC sectional view taken on the line of (A). (A) is a perspective view for explaining the second box element 20, (B) is a perspective view for explaining the first box element 10 (the blocking piece 16 is not shown). The figure for demonstrating the prevention piece with which the opening part of a 1st box element is equipped. Schematic for demonstrating the operation | work which covers a joint box. Schematic for demonstrating the operation | work which covers a joint box. The schematic sectional drawing for demonstrating the example from which the arrangement | positioning position of an engaging means differs from the joint box shown by FIGS. It is the schematic for demonstrating the example different from the joint box shown by FIGS. 1-5, (A) is a figure for demonstrating the convex part in a 2nd box element, (B) is B of (A). -B line sectional drawing, (C) is a figure for demonstrating the recessed part in a 1st box element. It is the schematic for demonstrating the example different from the joint box shown by FIGS. 1-5, (A) is a figure for demonstrating the convex part in a 2nd box element, (B) is in a 1st box element. The figure for demonstrating a recessed part. FIGS. 1A and 1B are schematic views for explaining an example different from the joint box shown in FIGS. 1 to 5, wherein FIG. 1A is a view for explaining a retaining hole in a first box element, and FIG. It is a figure for demonstrating a joint means, and sectional drawing which cut | disconnected the joint box of the state which combined two box elements in the BB line position of (A) (The two box elements are fractured | omitted and abbreviate | omitted). Schematic for demonstrating the example different from the joint box shown by FIGS. It is a figure for demonstrating a prior art example, (A) is a fragmentary sectional view which shows an expansion | extension state, (B) is a fragmentary sectional view which shows a contraction state. The figure for demonstrating the covering operation | work with respect to a connection bundle using the conventional joint box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Joint box, 2 ... Surrounding member, 3 ... End surface member, 4 ... Opening part, 5 ... Connection bundle storage space, 6 ... Construction material, 7 ... Electric wire, DESCRIPTION OF SYMBOLS 8 ... Connection bundle, 8a ... Head side, 8b ... Lower side, 9 ... Connector, 10 ... 1st box element, 11 ... Perimeter wall member, 11a ... Outer peripheral surface 11b ... Inner circumferential surface, 11c ... Lower edge, 11d ... Upper edge, 16 ... Blocking piece, 16a ... Original part, 16b ... Front part, 17 ... Slit, 18 ... collar, 19 ... mounting part, 19a ... stop hole, 20 ... second box element, 21 ... peripheral wall member, 21a ... outer peripheral surface, 21b ... inner periphery 21c ... lower edge, 29 ... double cylinder part, 30 ... engagement means, 31 ... recess, 32 ... projection, 32a ... projection, 33 ... Cut, 34 ... convex part, 36 ... guide groove, 37 ... guide piece, 38 ... guide groove, 39 ... guide piece, 40 ... stop hole, 41 ... stop part , 50 ... hand, R ... resistance force, C ... engagement force, T ... pressing force, F ... fixed object (floor surface, wire bundle),

Claims (5)

A joint box for insulatingly covering a bundle of wires formed by bundling the ends of a plurality of wires in a branch wiring,
The peripheral wall member that is positioned around the wire bundle and that forms the wire bundle storage space inside,
A rear end face member located on the head side of the wire bundle;
A front opening for inserting the connection bundle toward the end face member in the connection bundle storage space surrounded by the peripheral wall member;
The peripheral wall member further includes a first box element including a peripheral wall member positioned around the wire bundle and the front opening.
It is composed of two members, a peripheral wall member positioned around the connection bundle and a second box element provided with a rear end face member positioned on the head side of the connection bundle,
These box elements are combined into a concentric double cylindrical shape from the above-mentioned peripheral wall members to form an integral joint box,
Corresponding to the size of the connection bundle inserted into the storage space from the opening, the length between the opening and the end surface member is expanded and contracted to correspond to the length of the connection bundle. In the extendable joint box, the double cylindrical portions of the peripheral wall members are in contact with each other so that they can be expanded and contracted in the axial direction when pushed and pulled by hand. ,
Between the first box element and the second box element, provided with a pair of engaging means composed of a concave portion and a convex portion,
The engagement force of the engagement means is set when the second box element is held with one hand and the first box element receives a resistance force due to the presence of the connection bundle when the first box element is put on the connection bundle. However, the positional relationship of the second box element with respect to the first box element is constant, and a transmission force larger than the resistance force is transmitted from the second box element to the first box element via the engaging means. Is set to be able to
Moreover, the engagement force of the engagement means is set by applying a pressing force larger than the transmission force to the second box element when the second box element is slid with respect to the first box element. A telescopic joint box, wherein the second box element is set so as to be slidable in the axial direction relative to the first box element. A joint box for insulatingly covering a bundle of wires formed by bundling the ends of a plurality of wires in a branch wiring,
The peripheral wall member that is positioned around the wire bundle and that forms the wire bundle storage space inside,
A rear end face member located on the head side of the wire bundle;
A front opening for inserting the connection bundle toward the end face member in the connection bundle storage space surrounded by the peripheral wall member;
The peripheral wall member further includes a first box element including a peripheral wall member positioned around the wire bundle and the front opening.
It is composed of two members, a peripheral wall member positioned around the connection bundle and a second box element provided with a rear end face member positioned on the head side of the connection bundle,
These box elements are combined into a concentric double cylindrical shape from the above-mentioned peripheral wall members to form an integral joint box,
Corresponding to the size of the connection bundle inserted into the storage space from the opening, the length between the opening and the end surface member is expanded and contracted to correspond to the length of the connection bundle. In the extendable joint box, the double cylindrical portions of the peripheral wall members are in contact with each other so that they can be expanded and contracted in the axial direction when pushed and pulled by hand. ,
Inside the opening of the first box element, an original part is fixed to the opening, the tip protrudes toward the center position of the first box element, and the size of the cross section is elastically curved. A blocking piece for pulling out is provided, and a pair of engaging means including a concave portion and a convex portion are provided between the first box element and the second box element. ,
The engaging force of the engaging means is set such that when the second box element is held with one hand and the first box element is put on the wire bundle, the blocking piece is connected to the wire bundle due to the presence of the wire bundle. Even when a resistance force is received by abutting against the first box element, the positional relationship of the second box element with respect to the first box element is constant, and the second box element is engaged with the first box element via the engaging means. The transmission force larger than the resistance force is transmitted, and the blocking piece is pushed and bent by the connection bundle, so that the first box element can be advanced,
Moreover, the engagement force of the engagement means is set by applying a pressing force larger than the transmission force to the second box element when the second box element is slid with respect to the first box element. A telescopic joint box, wherein the second box element is set so as to be slidable in the axial direction relative to the first box element.   A guide means comprising a pair of guide grooves parallel to the axial direction of the joint box and a guide piece is provided on each side of the concave portion and the convex portion in the engaging means, and the second means with respect to the first box element. The telescopic joint box according to claim 1 or 2, wherein the second box element is prevented from returning in the circumferential direction with respect to the first box element when the box element is expanded and contracted.   The recesses in the engaging means are provided in a state of being continuous over the entire circumferential direction of the corresponding peripheral wall, and relative engagement can be obtained even if the relative angle in the circumferential direction of the second box element with respect to the first box element changes. The telescopic joint box according to claim 1 or 2, wherein the joint box is extendable. A pair of engaging means composed of a concave portion and a convex portion are provided at peripheral wall positions 180 ° apart of the joint box, respectively, and when the positions are pressed from the outer periphery, the engaging force between the concave portion and the convex portion is increased. The telescopic joint box according to claim 1 or 2, wherein the engagement force is weakened when the outer peripheral wall is pressed at a position moved by 90 ° from the position.

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