Clamp type joint tap holder and joint tap set

Abstract

To provide a clamp-type joint tap holder that is easy to attach to a table, etc., and has a smart appearance.SOLUTION: The clamp type joint tap holder includes a pair of clamp holders 21, 21. The clamp holder 21 includes a clamp screw 22 with a clamp knob 22K facing upward, a housing 24 surrounding the surroundings of the clamp screw 22, an upper jaw portion 25 provided on the clamp knob 22K side of the housing 24, a lower jaw portion 26 engaged with a screw portion of the clamp screw 22, an opening portion 24S for restricting the displacement direction of the lower jaw portion 26, an opening portion 24A provided in a side wall of the housing for exposing at least a range of angles of the clamp knob 22K, and an engaged portion 25H provided for engaging an engagement portion 14 of one end of a joint tap 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a clamp-type joint tap holder and a joint tap set for fixing a joint tap having a plurality of connectors arranged thereon to a plate-like member such as a table top. [Background technology]

[0002] A joint tap holder for attaching a joint tap having multiple connectors arranged side by side to a table top is known (see Patent Documents 1, 2, 3, Non-Patent Documents 1, 2, etc.). A joint tap that has a power cord-attached outlet as one of its connectors is specifically called a "power tap" or "table tap." The holder disclosed in Patent Document 1 comprises a pair of fixed holders which are fixed to the underside of the table top with bolts (screws), and by sliding a pair of end caps attached to the left and right ends of the joint tap into the pair of fixed holders, the engaging portions in the end caps engage with the engaged portions of the fixed holders, thereby fixing the joint tap to the underside of the table top. The holder disclosed in Patent Document 2 comprises a clamp that clamps the table top from both sides, a holder body attached to the upper jaw of the clamp, and a pair of ribs arranged in a rail-like manner on the holder body, and is fixed to the surface of the table top by inserting a joint tap between the pair of ribs. The holder disclosed in Patent Document 3 comprises a pair of clamps that clamp the table top from both the front and back, and a pair of brackets attached to the upper jaws of the pair of clamps, and fixes the joint tap to the surface of the table top by fitting one end and the other end of the joint tap into the pair of brackets. The holder disclosed in Non-Patent Document 1 comprises a clamp that holds the table top from both the front and back, and a holder body with a U-shaped cross-section that is attached to the upper jaw of the clamp, and is fixed to the front side of the table top by fitting a joint tap into the holder body. The holder disclosed in Non-Patent Document 2 comprises a pair of U-shaped plates that fit laterally into the table top, a pair of screw receivers and a pair of knob screws attached to the upper walls of the pair of U-shaped plates, and fixes the joint tap to the surface side of the top by tightening the knob screws with the base plate of the joint tap sandwiched between the upper wall of the U-shaped plates and the table top. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7036407 [Patent Document 2] JP 2003-249319 A [Patent Document 3] Utility Model Registration No. 3076736 [Non-patent literature]

[0004] [Non-Patent Document 1] "Power Strip Holder 200-CB009", Sanwa Supply Co., Ltd., [Searched on October 18, 2023], Internet<URL:https: / / direct.sanwa.co.jp / ItemPage / 200-CB009> [Non-Patent Document 2] "Clamp-type information / power outlet", ITOKI Corporation, [Searched on October 18, 2023], Internet<URL:https: / / shop.itoki.jp / shop / g / g22105500 / > Summary of the Invention [Problem to be solved by the invention]

[0005] However, the holders disclosed in Patent Documents 1, 2, 3, and Non-Patent Document 1 require the screws to be tightened from the underside of the tabletop, which means that the user must either insert their hand under the tabletop and tighten the screws using only the feeling of their fingertips, or crawl under the table to visually check the screws, making installation difficult. In addition, the holders disclosed in Patent Documents 2 and 3 and Non-Patent Documents 1 and 2 use clamps, so screws such as clamp screws protrude from the front or back of the tabletop, making the area around the table look untidy and unattractive. In addition, the clamp of the holder disclosed in Patent Documents 2 and 3 and Non-Patent Document 1 requires parts such as at least an upper jaw, a lower jaw, and a clamp screw, and the holder disclosed in Non-Patent Document 2 requires parts such as a U-shaped plate, a screw holder, and a knob screw. With either holder, if the screws are loosened too much, they will easily fall out and the parts will come apart, so care must be taken when handling them.

[0006] SUMMARY OF THE PRESENT EMBODIMENT The present invention provides a clamp-type joint tap holder and a joint tap set that can be easily attached to a table or the like and can also be arranged to have a smart appearance. [Means for solving the problem]

[0007] In order to solve the problem, the clamp-type joint tap holder of the present invention is a clamp-type joint tap holder having a pair of clamp holders for holding both ends of a joint tap having a plurality of connectors arranged thereon and fixing it to a plate-like member to which it is to be fixed, and each of the pair of clamp holders is characterized in that it comprises a clamp screw with a clamp knob facing upward, a housing surrounding the clamp screw, an upper jaw portion provided on the clamp knob side of the housing, a lower jaw portion having a screw receiver that screws into the threaded portion of the clamp screw, an opening provided in a side wall of the housing to limit the displacement direction of the lower jaw portion to a direction along the central axis of the clamp screw, an opening provided in the side wall of the housing to expose at least a portion of the angular range of the clamp knob, and an engaged portion provided to engage an engaging portion at one end of the joint tap.

[0008] In order to solve the above problems, in any of the clamp type joint tap holders according to the present invention, the clamp screw may be made of synthetic resin, and the periphery of the clamp knob may be knurled.

[0009] In order to solve the problem, in any one of the clamp type joint tap holders according to the present invention, the clamp screws of each of the pair of clamp holders may be left-handed screws.

[0010] In order to solve the problem, in any of the clamp type joint tap holders of the present invention, a non-threaded portion may be provided near the tip of the clamp screw so that the screw receiver of the lower jaw and the clamp screw rotate freely when the distance between the upper jaw and the lower jaw exceeds a predetermined range.

[0011] In order to solve the problem, any of the clamp-type joint tap holders of the present invention may further include a coil spring arranged around the non-threaded portion to re-thread the screw receiver of the lower jaw portion into the threaded portion when the screw receiver has reached the idling state.

[0012] In order to solve the above problems, the joint tap set according to the present invention is characterized by comprising any one of the clamp-type joint tap holders according to the present invention and the joint tap.

[0013] In order to solve the problem, in the joint tap set of the present invention, the joint tap comprises a main body frame that houses a plurality of connector modules in an array, and a pair of end caps attached to both ends of the main body frame so as to clamp the plurality of connector modules housed in the main body frame, and each of the pair of end caps may be provided with an engaging portion that can engage with the engaged portion.

[0014] In order to solve the above problems, in any one of the joint tap sets according to the present invention, any one of the plurality of connector modules may be a power cord-equipped outlet module.

[0015] In order to solve the problems, any of the joint tap sets according to the present invention may further include a rear cover for covering a rear side of the joint tap.

[0016] In order to solve the problem, in any of the joint tap sets of the present invention, the rear cover may be a member having an approximately L-shaped cross-section that covers the rear side of the joint tap while ensuring the space necessary for the power cord extending from the rear of the joint tap to hang down toward the floor. Effect of the Invention

[0017] A user of the clamp-type joint tap holder according to the present invention can attach one of the clamp holders to a plate-like member (e.g., a table top) of any thickness by clamping the edge of the plate-like member (e.g., a table top) between the upper and lower jaws of one of the clamp holders and then tightening the clamp knob located above the surface of the plate-like member. Since the lower jaw of this clamp holder can be raised and lowered within the range of the threaded portion of the clamp screw, a sufficient range of thicknesses (freedom of thickness) of the target plate-like member can be ensured. Then, the user can similarly attach the other clamp holder to the side of the first clamp holder at a predetermined distance, and then fix the joint tap by engaging the engaging portions at both ends of the joint tap with the engaged portions of the pair of clamp holders. Here, the clamp knob, which is the operating part of the pair of clamp holders, is positioned on the side of the upper jaw of the pair of clamp holders, so that the user can easily operate it without having to insert their hand into the back side of the plate-shaped member (e.g., a table top) or crawl under the plate-shaped member (e.g., a table top). In addition, since the clamp screw of each of the pair of clamp holders is covered by the housing, the outer contour of each of the pair of clamp holders can be made into a smooth curved surface or a flat surface. Meanwhile, since appropriate openings are provided in the portion required for operating the clamp knob and the portion required for guiding the lower jaw, the clamping function is not impaired even if the clamp screw is covered by the housing. In addition, since the clamp screw is covered by the housing, the clamp screw will not come loose and fall even if the distance between the lower and upper jaws of a pair of clamp holders is expanded to its limit, and there is no risk of the parts of the pair of clamp holders (clamp screw, upper jaw, lower jaw) separating or disassembling during attachment to a plate-like member (e.g., a table top). Therefore, the clamp-type joint tap holder and the joint tap set equipped with the same according to the present invention can be easily attached to a table or the like, and can also have a smart appearance. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a joint tap set according to an embodiment, as viewed from the rear side. [Diagram 2] FIG. 2 is a perspective view showing the joint tap set attached to the top plate of a table, as viewed from the rear side. [Diagram 3] Figure 3(1) is a perspective view of the left clamp holder, Figure 3(2) is a front view of the left clamp holder, Figure 3(3) is a left side view of the left clamp holder, Figure 3(4) is a plan view of the left clamp holder, Figure 3(5) is a rear view of the left clamp holder, and Figure 3(6) is a bottom view of the left clamp holder. [Figure 4] Figure 4(1) is a perspective view of the right clamp holder, Figure 4(2) is a front view of the right clamp holder, Figure 4(3) is a right side view of the right clamp holder, Figure 4(4) is a plan view of the right clamp holder, Figure 4(5) is a rear view of the right clamp holder, and Figure 4(6) is a bottom view of the right clamp holder. [Diagram 5] FIG. 5(A) is a diagram of the internal structure of the clamp holder when the lower jaw is fully open and disengaged from the threaded portion of the clamp screw, and FIG. 5(B) is a cross-sectional view of the clamp holder in the same state. [Figure 6] FIG. 6(A) is a diagram of the internal structure of the clamp holder with the lower jaw being pushed back by a coil spring, and FIG. 6(B) is a cross-sectional view of the clamp holder in the same state. [Figure 7] FIG. 7 is a perspective view of the joint tap set with the rear cover attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a preferred embodiment of a clamp-type joint tap holder and a joint tap set including the same according to the present invention will be described with reference to the drawings.

[0020] 1. Outline of joint tap set configuration First, a schematic configuration of a joint tap set according to this embodiment will be described with reference to Figs. Fig. 1 is a perspective view of the joint tap set according to the embodiment, seen from the rear side, and Fig. 2 is a perspective view of the joint tap set attached to a table top, seen from the rear side. As shown in Fig. 1, the joint tap set 1 according to this embodiment includes a clamp-type joint tap holder 20 and a joint tap 10. The clamp-type joint tap holder 20 includes a pair of clamp holders 21, 21 for holding both ends of the joint tap 10 and fixing it to the table top 100 (Fig. 2). The pair of clamp holders 21, 21 are attached to the edge of the table top 100 at a predetermined distance apart, as shown in Fig. 2. When attaching each clamp holder 21 to the table top 100, the table top 100 is sandwiched between the upper jaw 25 and the lower jaw 26 of the clamp holder 21, and the clamp knob 22K is rotated clockwise to firmly clamp and fix the table top 100 between the upper jaw 25 and the lower jaw 26. In this state, when the joint tap 12 is slid and inserted from the front side (the rear left side in Figure 2) of the clamp-type joint tap holder 20, the engaging portions 14, 14 (Figure 1) on both ends of the joint tap 12 engage with the engaged portions 25H, 25H (Figure 1) of the pair of clamp holders 21, 21, thereby fixing the joint tap 12 in place. Incidentally, the process of fixing the joint tap 12 to the table top 100 is not limited to this, and it is also possible to adopt, for example, a process in which the engaged portions 25H, 25H of the clamp holders 21, 21 are first engaged with the engaging portions 14, 14 of the joint tap 12, respectively, and then the clamp holders 21, 21 are attached to the table top 100. Then, when the joint tap 12 is fixed to the top plate 100 by any of the processes, the tops 24U, 24U of the pair of clamp holders 21, 21 and the upper surface of the joint tap 10 form a continuous smooth surface as shown in Fig. 2, giving the pair of clamp holders 21, 21 and the joint tap 10 an overall unified appearance. Also, since the front of the joint tap 10 faces diagonally upward, it is easy to insert a plug (not shown) into the socket of the joint tap 10 (see the upper right of Fig. 1). The clamp-type joint tap holder 20 of this embodiment, capable of holding the joint tap 10 in such an inclined position, is intended to be installed on the edge of the table top 100 opposite the side where people sit, but the clamp knob 22K can be operated by the user with his / her fingers from the front side of the table, making installation easy. Of course, it can also be operated with fingers from the back side of the table.

[0021] 2. Outline of joint tap configuration Next, a schematic configuration of the joint tap according to this embodiment will be described with reference to Figs. As shown in FIGS. 1 and 2, the joint tap 10 includes a main body frame 12 and a pair of end caps 13, 13. The main frame 12 is a frame made of, for example, metal (such as an aluminum extrusion) that houses multiple connector modules (two in this case: the power cordless outlet module 11 and the power corded outlet module 111) lined up side by side. Here, the number of ports of the housed connector modules is "2", but if the length of the main frame 12 in the left-right direction is extended, the number of ports of the connector modules can be three or more. The pair of end caps 13, 13 are caps made of, for example, synthetic resin, which are attached to both ends of the main body frame 12 so as to sandwich the outlet module 11 and the outlet module with a power cord 111 housed in the main body frame 12. 1, engaging portions 14, 14 are individually provided on the lower portions of the pair of end caps 13, 13, and the structure of these engaging portions 14, 14 is such that they can engage with engaged portions 25H, 25H individually provided on the tops of the upper jaw portions 25, 25 of the pair of clamp holders 21, 21. As the structure of such engaging portions 14, 14, for example, the structure of the mounting mechanisms 20, 20 disclosed in Patent Document 1 can be used which is inverted upside down.

[0022] 3. Pair of clamp holders Next, the configuration of the pair of clamp holders will be described with reference to Figs. Fig. 3(1) is a perspective view of the left clamp holder, Fig. 3(2) is a front view of the left clamp holder, Fig. 3(3) is a left side view of the left clamp holder, Fig. 3(4) is a plan view of the left clamp holder, Fig. 3(5) is a rear view of the left clamp holder, Fig. 3(6) is a bottom view of the left clamp holder, Fig. 4(1) is a perspective view of the right clamp holder, Fig. 4(2) is a front view of the right clamp holder, Fig. 4(3) is a right side view of the right clamp holder, Fig. 4(4) is a plan view of the right clamp holder, Fig. 4(5) is a rear view of the right clamp holder, and Fig. 4(6) is a bottom view of the right clamp holder. Here, the clamp holder 21 located on the left when viewed from the front is referred to as the "left clamp holder" and the clamp holder 21 located on the right is referred to as the "right clamp holder". However, since the left clamp holder 21 and the right clamp holder 21 basically have a symmetrical shape, the following description will be given without distinguishing between the left and right clamp holders 21, 21 (incidentally, the shape of the clamp screw 22 is common to the left clamp holder 21 and the right clamp holder 21 and is not symmetrical, as will be described in detail later). 3 and 4, the clamp holder 21 includes a clamp screw 22 with a clamp knob 22K facing upward, a housing 24 surrounding the clamp screw 22, an upper jaw 25 provided on the clamp knob 22K side of the housing 24, and a lower jaw 26 having a screw receiver 26N that screws into the threaded portion 22B of the clamp screw 22. The clamp screw 22, housing 24, upper jaw 25, and lower jaw 26 are made of, for example, synthetic resin. In addition, a vertically elongated slit-shaped opening 24S is provided on the side wall of the housing 24 on the lower front side of the upper jaw 25 to limit the displacement direction of the lower jaw 26 accompanying rotation of the clamp knob 22K to the direction along the central axis of the clamp screw 22. Furthermore, a horizontally elongated slit-shaped opening 24A for exposing at least a partial angular range of the clamp knob 22K is provided on a side wall of the housing 24, which is a chamber in which the clamp knob 22K is housed. The part of the clamp knob 22K exposed to the outside from the housing 24 functions as a so-called "operation dial" that can be operated by the user with a finger. Further, an engaged portion 25H is provided at the top of the upper jaw portion 25 for engaging with the engaging portion 14 of the end cap 13 provided at one end of the joint tap 12. The structure of this engaged portion 25H may be the same as that of the engaged portion 17A disclosed in Patent Document 1, for example. In addition, the periphery of the clamp knob 22K is knurled, for example, to prevent slipping when the user operates (dial) the knob with his / her fingers. Moreover, the clamp screws 22 of the pair of clamp holders 21, 21 are both left-handed threads. That is, the clamp screw 22 of the left clamp holder 21 (FIG. 3) is a left-handed thread, and the clamp screw 22 of the right clamp holder 21 (FIG. 4) is also a left-handed thread. Therefore, when the user rotates the clamp knob 22K of the left clamp holder 21 clockwise, the lower jaw 26 of the left clamp holder 21 rises and the gap between the upper jaw 25 and the lower jaw 26 narrows, and when the user rotates the clamp knob 22K of the right clamp holder 21 clockwise, the lower jaw 26 of the right clamp holder 21 rises and the gap between the upper jaw 25 and the lower jaw 26 narrows. Therefore, the user can tighten the top board 100 from above and below by rotating the left and right clamp knobs 22K, 22K clockwise, respectively, and can operate the left and right clamp knobs 22K with the same operational feel as when tightening a general right-handed screw.

[0023] 4. Anti-fall and anti-breakage structure Next, the structure for preventing the clamp-type joint tap holder from falling off and being damaged will be described with reference to Figs. Figure 5(A) is a diagram of the internal structure of the clamp holder when the lower jaw is fully open and disengaged from the threaded portion of the clamp screw, Figure 5(B) is a cross-sectional view of the clamp holder in the same state, Figure 6(A) is a diagram of the internal structure of the clamp holder when the lower jaw is pushed back by a coil spring, and Figure 6(B) is a cross-sectional view of the clamp holder in the same state. As shown in Figures 5 and 6, in the clamp holder 21 of this embodiment, a predetermined length near the tip of the clamp screw 22 is a non-threaded portion 22N so that the screw receiver 26N of the lower jaw 26 and the clamp screw 22 will spin freely when the distance between the upper jaw 25 and the lower jaw 26 exceeds a predetermined range. Therefore, if the user turns the clamp knob 22K too far left, the screw receiver 26N of the lower jaw 26 comes off the threaded portion 22B of the clamp screw 22 and spins freely, and the lower jaw 26 does not move down any further, so that even if the clamp knob 22K is turned left, the lower jaw 26 is not pressed strongly against the bottom of the housing 24 or the lower end of the opening 24S. As a result, damage to the housing 24 due to turning the clamp knob 22K too far can be prevented. However, since the screw receiver 26N of the lower jaw 26 has reached the idling state and is disengaged from the threaded portion 22B of the clamp screw 22, the lower jaw 26 cannot be raised even if the user rotates the clamp knob 22K to the right. Therefore, in the clamp holder 21 of this embodiment, in order to screw the screw receiver 26N of the lower jaw 26, which has reached an idling state, back into the threaded portion 22B, a coil spring 28 is wound around the non-threaded portion 22B. This coil spring 28 is biased in a direction separating the bottom of the housing 24 from the lower jaw 26, which has reached an idling state, so that the height position of the lower jaw 26, which has reached an idling state, can be returned to the height position where the threaded portion 22B is formed. Therefore, even after the lower jaw 26 has reached an idling state, if the user rotates the clamp knob 22K to the right, the screw receiver 26N of the lower jaw 26 can be screwed into the screw portion 22B, thereby lifting the lower jaw 26.

[0024] 5. Rear cover Next, a back cover that can be attached to the joint tap set 1 will be described. Fig. 7 is a perspective view of the joint tap set with the rear cover attached. As shown in Fig. 7, the joint tap set 1 of this embodiment is provided with a rear cover 24C made of, for example, metal (aluminum extrusion, etc.) for covering the rear side of the joint tap 10. This rear cover 24C is attached to the rear side of the joint tap set 1 in the state of Fig. 2, and is a member with a substantially L-shaped cross section that can cover the rear side of the joint tap 10 while securing the space required for the power cord extending from the rear of the joint tap 10 to hang down toward the floor. The surface of this rear cover 24C forms a smooth curved surface that is continuous with the tops 24U, 24U of the pair of clamp holders 21, 21 and the upper surface of the joint tap 10. Therefore, this rear cover 24C can give the rear side of the joint tap 10 a neat appearance, and can also give the pair of clamp holders 21, 21 and the entire joint tap 10 a unified appearance. As shown in FIG. 2, the right side wall of the left clamp holder 21 and the left side wall of the right clamp holder 21 are provided with a plurality of claws 24N, 24N, . . . that can be engaged with the edge of the rear cover 24C.

[0025] 6. Effects of the embodiment As described above, a user of the clamp-type joint tap holder 20 according to this embodiment can clamp the edge of the table top 100 between the upper jaw 25 and the lower jaw 26 of the left clamp holder 21, for example, and then tighten the clamp knob 22K located above the surface of the table top 100 by turning it clockwise to attach the left clamp holder 21 to the table top 100. This left clamp holder 21 can raise and lower the lower jaw 26 within the range in which the threaded portion 22B provided on the clamp screw 22 is formed, so that the thickness range (degree of freedom in thickness) of the target table top 100 can be sufficiently secured. The thickness range (degree of freedom in thickness) is, for example, from 5 mm to 35 mm. The user then similarly attaches the right clamp holder 21 to the right of the left clamp holder 21, with a specified distance between them, and then slides the joint tap 10 between the left and right clamp holders 21, 21, and fixes the joint tap 10 by engaging the engaging portions 14, 14 of the end caps 13, 13 with the engaged portions 25H, 25H of the clamp holders 21, 21. Here, the clamp knobs 22K, 22K, which are the operating parts of the pair of clamp holders 21, 21, are positioned on the side of the upper jaw portions 25, 25 of the pair of clamp holders 21, 21, so that the user can easily operate them without having to insert his or her hand into the back side of the tabletop 100 or crawl under the tabletop 100. In addition, since the clamp screws 22, 22 of the pair of clamp holders 21, 21 are covered by the housings 24, 24, it is possible to make the outer contours of each of the pair of clamp holders 21, 21 into a smooth curved surface or a flat surface. On the other hand, since appropriate openings 24A, 24S are provided in the portions necessary for operating the clamp knobs 22K, 22K and the portions necessary for guiding the lower jaw 26, the clamping function is not impaired even if the clamp screws 22 are covered by the housing 24. Furthermore, since the clamp screw 22 is covered by the housing 24, even if the distance between the lower jaw 26 and upper jaw 25 of the pair of clamp holders 21, 21 is expanded to its limit, the clamp screw 22 will not come loose and fall, and there is no risk of the parts of the pair of clamp holders 21, 21 (clamp screw 22, upper jaw 25, lower jaw 26) separating or disassembling during attachment to the top plate 100. Therefore, the clamp type joint tap holder 20 according to this embodiment and the joint tap set 1 equipped with it can be easily attached to a table or the like, and can also have a smart appearance.

[0026] 7. Variations The present invention is not limited to the above-described embodiments, and various inventions can be realized by appropriately modifying the components without departing from the scope of the present invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in each embodiment. [Explanation of symbols]

[0027] 100 Tabletop 1 Joint Tap Set 10 Joint Tap 11 Connector Module 111 Power Outlet Module with Power Cord 12 Main frame 13,13 End cap 14,14 Engagement part 20 Clamp type joint tap holder 21 Clamp holder 22 Clamp screw 22K Clamp knob 22B Threaded part 22N Non-threaded part 24 Case 24S opening 24A opening 24C Rear cover 24U top 24N claw part 25 Upper jaw 25H Engaged part 26 Mandible 26N Screw holder 28 Coil spring

Claims

1. A clamp-type joint tap holder having a pair of clamp holders for holding both ends of a joint tap having a plurality of connectors arranged thereon and fixing the joint tap to a plate-like member to which the joint tap is to be fixed, Each of the pair of clamp holders is A clamp screw with the clamp knob facing upwards; A housing that surrounds the clamp screw; an upper jaw portion provided on the clamp knob side of the housing; A lower jaw portion having a screw receiver that screws into a threaded portion of the clamp screw; an opening provided in a side wall of the housing for restricting a displacement direction of the lower jaw to a direction along a central axis of the clamp screw; an opening in a side wall of the housing for exposing at least a portion of the angular range of the clamp knob; an engaged portion provided for engaging with an engaging portion at one end of the joint tap; A clamp type joint tap holder comprising:

2. The clamp type joint tap holder according to claim 1, The clamp screw is made of synthetic resin. The clamp knob has a knurled periphery. A clamp type joint tap holder characterized by:

3. The clamp type joint tap holder according to claim 1, The clamp screws of each of the pair of clamp holders are left-handed screws. A clamp type joint tap holder characterized by:

4. The clamp type joint tap holder according to claim 1, The clamp screw further includes a non-threaded portion provided near a tip of the clamp screw so that the screw receiver of the lower jaw and the clamp screw rotate freely when the distance between the upper jaw and the lower jaw exceeds a predetermined range. A clamp type joint tap holder characterized by:

5. The clamp type joint tap holder according to claim 4, a coil spring disposed around the non-threaded portion for screwing the screw receiver of the lower jaw portion back into the threaded portion when the screw receiver has reached the idling state. A clamp type joint tap holder characterized by:

6. A joint tap set comprising the clamp type joint tap holder according to any one of claims 1 to 5 and the joint tap.

7. The joint tap set according to claim 6, The joint tap is a main body frame that accommodates a plurality of connector modules in an aligned manner; a pair of end caps attached to both ends of the main body frame so as to sandwich the plurality of connector modules housed in the main body frame; Equipped with Each of the pair of end caps includes the engaging portion that is engageable with the engaged portion. A joint tap set characterized by:

8. The joint tap set according to claim 6, Any one of the plurality of connector modules is a power outlet module with a power cord. A joint tap set characterized by:

9. The joint tap set according to claim 8, Further provided with a rear cover for covering the rear side of the joint tap. A joint tap set characterized by:

10. The joint tap set according to claim 9, The rear cover is A member having a substantially L-shaped cross section that covers the rear side of the joint tap while ensuring the space required for the power cord extending from the rear of the joint tap to hang down toward the floor. A joint tap set characterized by:

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