Pull Box

Abstract

To provide a pull box capable of simplifying the work of attaching a lid as much as possible while maintaining safety, shortening the number of work steps and the work time, and enabling easy attachment even by one person, thereby enhancing the efficiency of the attachment work. [Solution] The pull box is composed of a base, which is a rectangular box, and a lid 6. The four edges of the base are each folded at a right angle to form four sides that protrude inward, and the back side of the lid 6 is provided with insert members 10, 20, 30 that fit into three of the four sides. Insert member 10 has an insert portion 13 that fits with the lower side 3, insert member 20 has an insert portion 23 and an insert guide portion 24 that fit with the upper side 2, and insert member 30 has an insert portion 33 and an insert guide portion 34 that fit with the left side 5.

Description

[Technical field]

[0001] The present invention relates to a pull box used for branching and connecting wiring. [Background technology]

[0002] Pull boxes are used in places where multiple electrical conduits cross or converge, to make it easier to pull wires and cables into the conduits or to branch them out.

[0003] Pull boxes are installed at relatively high places within buildings, and installation work often requires the use of scaffolding or stepladders. In addition, when working at high places, workers must wear full harnesses, making the work physically difficult and restrictive.

[0004] With conventional pull boxes, the lid was attached by temporarily and finally fastening it with a screw at the same time, which made installation difficult and required careful attention to prevent the lid or screws from falling off.

[0005] In addition, the lid is heavy, and considering work safety and ease of construction, it always requires two people to work on it, which reduces work efficiency. Summary of the Invention [Problem to be solved by the invention]

[0006] To provide a pull box that simplifies the installation work of the lid of the pull box as much as possible while maintaining safety, shortens the labor hours and time required for the installation, and enables easy installation even by one person, thereby increasing the efficiency of the installation work. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objective, the first feature of the pull box of the present invention is that the pull box is composed of a rectangular base and a lid, the four edges of the base are each folded at a right angle to form four sides that protrude inward, and the back side of the lid is provided with insert members that fit into three of the four sides to secure the base and the lid together.

[0008] In addition, a second feature of the pull box of the present invention is that the base in the first feature is rectangular, and the insert members consist of a pair of insert members having an insert portion that fits into one of the four long sides, a pair of insert members having an insert portion that fits into the other long side and an insert guide portion extended from the tip of the insert member, and one insert member having an insert portion that fits into one short side and an insert guide portion extended from the tip of the insert member.

[0009] Furthermore, a third feature of the pull box of the present invention is that, in the pull box consisting of a rectangular base and a lid, the four edges of the base are each folded at a right angle to form four sides that protrude inward, and the four corners of the back side of the lid are provided with leaf spring members that abut against two of the four sides to secure the base and the lid together.

[0010] Furthermore, a fourth feature of the pull box of the present invention is that in the pull box consisting of a rectangular base and a lid, the four edges of the base are each folded at a right angle to form four sides that protrude inward, and the four corners of the back side of the lid are provided with abutment members that abut against each of the four sides to secure the base and the lid together.

[0011] A fifth feature of the pull box of the present invention is that the abutment member in the fourth feature is composed of two rectangular prisms whose side surfaces abut against two of the four sides, and two rectangular prisms whose side surfaces abut against the other two sides and have protruding pieces that protrude in a stepped trapezoid shape so as to abut against the back sides of the two sides.

[0012] According to this invention, the lid of the pull box can be easily fixed when it is installed, making it possible to separate temporary fixing from final tightening, and eliminating the risk of the lid or screws falling off and the unnecessary work that accompanies them.

[0013] In addition, by preventing the lid from falling, safety can be ensured and installation can be performed by one person, improving work efficiency. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view showing the back surface of the lid of the pull box in the first embodiment. [Diagram 2] FIG. 2 is a plan view of the pull box base and its lid in the first embodiment. [Diagram 3] FIG. 4 is a right side view of the lid of the pull box in the first embodiment. [Figure 4] 10 is a plan view illustrating a process in which a lid of the pull box is attached to a base of the pull box in the first embodiment. FIG. [Diagram 5] FIG. 11 is a plan view of the pull box base and the lid in the second embodiment. [Figure 6] 6 is a cross-sectional view taken along line AA in FIG. 5, showing a state in which the pull box base and the lid are separated. [Figure 7] 6 is a cross-sectional view showing a state in which the pull box base and the lid are attached, as viewed from the line AA in FIG. 5. [Figure 8] FIG. 11 is a plan view of the pull box base and its lid in the third embodiment. [Figure 9] 13 is an explanatory plan view showing the process in which the lid of the pull box is attached to the base of the pull box in the third embodiment. FIG. BEST MODE FOR CARRYING OUT THEINVENTION

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0016] Figures 1 to 4 show Example 1 of the present invention. In the figures, 1 is a rectangular pull box base, 2 to 5 are sides formed by bending the four edges of the pull box base inward at right angles, 2 is the top side, 3 is the bottom side, 4 is the right side, and 5 is the left side.

[0017] Reference numeral 6 denotes the lid of the pull box in Example 1. The lid 6 has four sides of the same shape and size as the four sides of the base 1, and each has long and short sides. In Figs. 2 and 4, the back surface of the lid 6 has insert members 10 fixed to the left and right ends of the lower long side, insert members 20 fixed to the left and right ends of the upper long side, and insert member 30 fixed to the center of the left short side. The insert member 10 is inserted into and fitted to the lower side 3 of the base 1, the insert member 20 is inserted into and fitted to the upper side 2 of the base 1, and the insert member 30 is inserted into and fitted to the left side of the base 1. Reference numeral 7 denotes a handle for the lid.

[0018] The insert member 10 is formed by bending a plate-like member, and is formed so that the distance between the insert member 10 and the lid 6 increases toward the tip. The insert member 10 is composed of a fixed portion 11, a bent portion 12, and an insert portion 13, and the insert portion 13 is fixed to the back side of the lid 6 so as to face the lower long side. The fixed portion 11 is a portion fixed to both ends of the back side of the lid 6, belongs to the base of the insert member 10, and is fixed to the lid 6 by welding, screws, or the like. The bent portion 12 is a portion where an end portion connected to the fixed portion 11 is bent to form the insert member 13, and an end portion connected to the insert member 13 is bent, and belongs between the fixed portion 11 and the insert member 13. The insert member 13 forms an insert space 15, which is a space whose distance between the insert member 13 and the lid 6 is slightly longer than the thickness of the lower side 3 of the base 1, and the lower side 3 of the base 1 is inserted and fitted into the insert space 15 to fix the lid 6.

[0019] The insert member 20 is formed by extending an insert guide portion 24 from the tip of the insert member 10. That is, the insert member 20 is formed by bending a plate-shaped member, and is formed so that the distance between the insert member 20 and the lid 6 increases toward the tip. The insert member 20 is composed of a fixed portion 21, a bent portion 22, an insert portion 23, and an insert guide portion 24, and is fixed to the back side of the lid 6 so that the insert portion 23 and the insert guide portion 24 face the upper long side. The fixed portion 21 is a portion fixed to both ends of the back side of the lid 6, belongs to the base of the insert member 20, and is fixed to the lid 6 by welding, screws, or the like. The bent portion 22 is a portion where the end portion connected to the fixed portion 21 is bent to form the insert portion 23, and the end portion connected to the insert portion 23 is bent, and belongs between the fixed portion 21 and the insert portion 23. The insertion portion 23 forms an insertion space 25 with a distance between it and the lid 6 that is slightly longer than the thickness of the upper side 2 of the base 1, and the lid 6 is fixed by inserting and fitting the upper side 2 of the base 1 into the insertion space 25. The insertion guide portion 24 is continuous with the insertion portion 23 and is bent to form the tip of the insertion member 20, and forms an insertion space 26 with the lid 6 that is slightly longer than the insertion space 25.

[0020] The insert member 30 has almost the same structure as the insert member 20, but is provided at only one location and is formed larger than the insert member 20 in order to support the side surface of the lid 2 at one location. That is, the insert member 30 is formed by bending a plate-shaped member, and is formed so that the distance between the insert member 30 and the lid 6 increases toward the tip. The insert member 30 is composed of a fixed portion 31, a bent portion 32, an insert portion 33, and an insert guide portion 34, and is fixed to the back side of the lid 6 so that the insert portion 33 and the insert guide portion 34 face the left short side. The fixed portion 31 is a portion that is fixed to the back side of the lid 6, belongs to the base of the insert member 30, and is fixed to the lid 6 by welding, screws, or the like. The bent portion 32 is a portion where the end portion that is continuous with the fixed portion 31 is bent to form the insert portion 33, and where the end portion that is continuous with the insert portion 33 is bent, and belongs between the fixed portion 31 and the insert portion 33. The insertion portion 33 forms an insertion space 35 with a distance between it and the lid 6 that is slightly longer than the thickness of the left side 5 of the base 1, and the left side 2 of the base 1 is inserted and fitted into the insertion space 35 to fix the lid 6. The insertion guide portion 34 is continuous with the insertion portion 33 and is bent to form the tip of the insertion member 30, and forms an insertion space 36 with a distance slightly longer than the insertion space 35 between it and the lid 6.

[0021] Next, a method of attaching the base 1 and the lid 6 in Example 1 will be described with reference to Fig. 4. Fig. 4 is drawn from top to bottom in chronological order. In the example of Fig. 4, as shown in the upper diagram, first, the lid 6 is raised in the direction of the arrow while the side surface of the right end insert member 20 is placed against the right side 4 of the base 1, and the insert member 20 is inserted from the insert guide portion 24 to the insert portion 23 into the upper side 2 of the base 1. Since the height of the space 26 is relatively large, it is easy to insert the insert guide portion 24 into the upper side 2, and the insert portion 23 can also be easily inserted into the upper side 2 by being guided by this.

[0022] 4, the cover 6 is lowered in the direction of the arrow so that the fitting portions 13 of the fitting members 20 are fitted into the lower side 3 of the base 1. At this time, the fitting portions 23 of the fitting members 20 are also fitted into the upper side 2 of the base 1.

[0023] 4, the lid 6 is shifted to the right in the direction of the arrow, and the fitting portions 33 of the fitting members 30 are fitted into the left side 5 of the base 1. Since the height of the space 36 is relatively large, the fitting guide portion 34 can be easily inserted into the left side 5, and the fitting portion 33 can also be easily fitted into the left side 5 by being guided by the fitting guide portion 34. As a result, the pair of fitting members 10, the pair of fitting members 20, and the single fitting member 30 are fitted into the upper side 3, lower side 4, and left side 5, respectively, and the base 1 and the lid 6 are fixed together.

[0024] Moreover, the base 1 and the lid 6 can be easily removed by performing the steps of attachment in reverse order.

[0025] 5 to 7 show Example 2. In Example 2, a leaf spring is used to fix the base 1 and the lid 40. The leaf spring member 41 is formed by bending a leaf spring material, and is generally composed of a fixed part 42 that is fixed to the back side of the lid 40 by screws 43, and a movable part 44 that is formed by bending into a substantially triangular shape and has elasticity. The leaf spring member 41 is fixed to the four corners of the back side of the lid 40 such that the movable parts 44 face the upper side 2 and lower side 3 of the base 1. Reference numeral 45 denotes a handle of the lid 40.

[0026] The lid 40 is attached to the base 1 in such a manner that when the movable part 44 of the leaf spring member 41 abuts against the tip ends 2a, 3a of the upper edge 2 and lower edge 3 of the base 1, the movable part 44 moves inwardly of the lid 40 and the lid 40 is attached to the base 1, and the base 1 and the lid 40 are fixed together by the outward pressure of the movable part 44 due to the biasing force of the movable part 44.

[0027] Moreover, the base 1 and the lid 40 can be easily removed by pulling the handle 45, since the movable part 44 moves inwardly of the lid 40.

[0028] 8 and 9 show Example 3. In Example 3, four abutment members 51, 52, 53, and 56 disposed at the four corners of the back surface of the lid 50 abut against the right side 4, left side 5, bottom side 3, and top side 2 of the base 1, respectively, thereby fixing the base 1 and the lid 50. Reference numeral 59 denotes a handle of the lid 50.

[0029] The abutment members 51, 52 are rectangular parallelepipeds and are arranged on the back surface of the lid 50 so that, when the lid 50 and the base 1 are fixed together, the right side surface 51a of the abutment member 51 abuts along the inner tip portion 4a of the right side 4 of the base 1, and the left side surface 52a of the abutment member 52 abuts along the inner tip portion 5a of the left side 5 of the base 1.

[0030] In addition, the abutment member 53 consists of a rectangular abutment portion 54 and a trapezoidal protrusion 55 with a short side on the left side protruding from the abutment portion 54 toward the lower long side of the lid 50, and the abutment member 56 consists of a rectangular abutment portion 57 and a trapezoidal protrusion 58 with a short side on the right side protruding from the abutment portion 57 toward the upper long side.

[0031] The abutting member 53 is disposed on the back surface of the lid 50 so that, when the lid 50 and the base 1 are fixed together, the lower surface 54a of the abutting portion 53 abuts along the inner tip portion 3a of the side 3 of the base 1, and the upper surface 57a of the abutting member 56 abuts along the inner tip portion 2a of the side 2 of the base 1. In addition, the protruding pieces 55 and 58 are formed to form steps with the abutting portions 54 and 57 so that they can abut against the back sides of the lower side 3 and upper side 2 of the base 1, respectively, when the lid 50 and the base 1 are fixed together.

[0032] Next, a method of attaching the base 1 and the lid 50 in the third embodiment will be described with reference to FIG. 9. FIG. 9 is drawn from right to left in chronological order. In the example of FIG. 9, the lid 2 is rotated to the right so that the protruding pieces 55 and 58 enter the back sides of the lower side 3 and the upper side 2 of the base 1, and the upper surfaces of the protruding pieces 55 and 58 abut against the back sides of the lower side 3 and the upper side 2. The right side surface 51a of the abutting portion 51 abuts against the inner tip 4a of the right side 4, the left side surface 52a of the abutting portion 52 abuts against the inner tip 5a of the left side 5, the lower side surface 54a of the abutting portion 53 abuts against the inner tip 3a of the lower side 3, and the upper side surface 57a of the abutting portion 56 abuts against the inner tip 2a of the upper side 2, so that the abutting members press against the respective sides of the base 1, and the base 1 and the lid 50 are fixed.

[0033] Moreover, the base 1 and the lid 50 can be easily removed by performing the steps of attachment in reverse order.

[0034] The fixing methods according to Examples 1 to 3 can be used as is, but for safety reasons, it is preferable to further tighten the base and the lid with screws. [Explanation of symbols]

[0035] 1 Base 2 Top 3 Bottom 4 Right hand side 5 Left side 6 Lid 10 Insertion member 20 Insertion member 30 Insertion member 40 Lid 41 Leaf spring components 50 lids 51 Contact member 52 Contact member 53 Contact member 56 Contact member

Claims

1. A pull box consisting of a rectangular box base and a lid, The base has four edges each folded at a right angle to form four sides protruding inward; and a back side of the lid is provided with fitting members which fit into three of the four sides to fix the base and the lid together; A pull box characterized by:

2. the base is rectangular, and the insert members are comprised of a pair of insert members each having an insert portion that fits into one of the four long sides, a pair of insert members each having an insert portion that fits into the other long side and an insert guide portion that is extended from a tip of the insert portion, and one insert member each having an insert portion that fits into one of the short sides and an insert guide portion that is extended from a tip of the insert portion; The pull box according to claim 1 .

3. A pull box consisting of a rectangular box base and a lid, The base has four edges each folded at a right angle to form four sides protruding inward; The four corners of the back side of the lid are provided with leaf spring members that abut against two of the four sides to fix the base and the lid together; A pull box characterized by:

4. A pull box consisting of a rectangular box base and a lid, The base has four edges each folded at a right angle to form four sides protruding inward; abutting members are provided at the four corners of the back side of the lid to abut against the four sides respectively to fix the base and the lid; A pull box characterized by:

5. the abutment members are composed of two rectangular parallelepipeds whose side surfaces abut against two of the four sides, and two rectangular parallelepipeds whose side surfaces abut against the other two sides and have protruding pieces that protrude in a step-like trapezoid shape so as to abut against the back sides of the two sides; The pull box according to claim 4 .

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