JP2006114334A - Bulb replacement equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulb replacement equipment in which the bulb can be pinched by an appropriate pinching force, that state can be maintained easily, and constitution is simple even if it is the bulb of a different external shape. <P>SOLUTION: This is the bulb replacement equipment 10 which is provided with a supporting rod 11, a plurality of pinching pieces 21 which are swingably attached in the radial direction against the supporting rod 11 and of which the one end part 21a protrudes from the tip of the supporting rod 11, a bulb pinching part 29 installed at each of the end part 21a toward inside of the radiation direction, and an elastic member 23 to energize the other end part 21b of the pinching pieces 21 toward the outside of the radiation direction, and in which exchange of the bulb is carried out by pinching the bulb between the bulb pinching part 29 and rotating the supporting rod 11, and which is provided with a stopper means 25 to lock the end part 21b against elastic force of the elastic member 23 by being contacted with the end part 21b of the pinching pieces 21 from the outside of the emission direction, and an opening adjustment mechanism 35 capable of adjusting the distance from the supporting rod 11 of the stopper means 25. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light bulb exchange device for exchanging light bulbs such as lighting equipment installed at a high place.

  As a tool for exchanging light bulbs such as lighting equipment installed at a high place, a light bulb exchanging instrument having a light bulb holding mechanism for holding the light bulb on one end side of a long support is known. In such a light bulb replacement device, the operator operates the light bulb replacement device from below the lighting equipment, etc., holds the light bulb in the light bulb holding mechanism, and rotates the support so that the light bulb can be rotated and removed. It is possible to install.

  Many light bulb holding mechanisms are known in which the inner surface of a cylinder is made of an elastic material. Such a light bulb replacement device is configured such that the light bulb can be rotatably held by the elasticity of the elastic body by fitting the cylindrical body to the outer surface of the light bulb. However, when the external shape such as the diameter of the light bulb is different, a light bulb exchange device having a different inner shape of the cylinder must be used.

  In the following Patent Document 1, the light bulb holding mechanism includes a light bulb gripping part made up of a plurality of elastic pieces, a slide bar arranged concentrically outside the support, and a funnel-shaped press provided at the tip of the slide bar. The structure which provided the part. In this bulb replacement device, the bulb can be held by disposing the bulb in the bulb holding portion, sliding the slide rod, and contracting the bulb holding portion by the pressing portion. In this bulb exchange device, the bulb gripping portion is configured to be freely replaceable according to the size of the bulb, but if the opening and closing operation of the bulb gripping portion is increased, even a bulb having a different outer shape, It can be exchanged using the same bulb changer.

  However, since the bulb gripping part is contracted by the funnel part attached to the slide rod, the operator adjusts the amount of contraction of the bulb gripping part by adjusting the amount of movement of the slide bar. Must be maintained and must be maintained. Therefore, it took time and effort for the replacement work.

  In the following Patent Document 2, an arm pivot support portion is provided on the upper portion of the support body, a plurality of arms are pivotally supported at intermediate positions, a slidable guide member is disposed on the support body, and the first spring member is interposed via the guide member. The lower portion of the arm is urged so as to close the upper portion of the arm, that is, the upper portion of the arm is urged, and the light bulb receiving portion slidably arranged on the support is connected to the upper portion of the arm by a connecting link. There has been proposed a light bulb exchange device that is biased in a direction in which the upper portion of the arm is expanded by a spring member.

  In this bulb replacement device, when the bulb receiving portion is pressed against the lower portion of the bulb, the bulb receiving portion is pushed down against the force of the second spring member, and the upper portion of the arm is closed via the connecting link. It is possible to hold the light bulb between the upper parts of the arms. If it is strongly pressed against the lower part of the light bulb, it is possible to rotate the light bulb by increasing the holding force of the light bulb on the upper part of the arm. At this time, the guide member is pushed up by the first spring member and comes into contact with the lower part of the arm.

In this bulb replacement device, the upper portion of the arm is closed by pressing against the bulb, so that even the bulbs of different sizes can be replaced with the same bulb replacement device. In the state where the light bulb is held, the angle of the upper part of the arm can be maintained by the balance between the urging force of the first spring member, the urging force of the second spring member, and the frictional force between the lower part of the arm and the guide member.
JP 7-14559 A JP 2003-272568 A

  However, in conventional bulb replacement equipment that can replace bulbs with different external shapes, the clamping force of the bulb is obtained by sliding the slide rod and pressing the bulb holder to the bulb. The pinching force varies each time it is operated. For this reason, it is difficult to perform the replacement work, for example, the clamping force of the light bulb becomes excessive and the light bulb is destroyed, or the light bulb is difficult to rotate due to shortage. In addition, in the light bulb replacement device that can easily maintain the clamping state as in Patent Document 2, the arm upper portion is opened in order to maintain the opening degree of the upper arm portion by the balance of the strength and frictional force of the plurality of spring members. For example, a combination of a spring member biasing in the direction and a spring member biasing in the closing direction is combined.

  The present invention provides a light bulb replacement device that can hold a light bulb with an appropriate holding force even if the light bulbs have different external shapes, can easily maintain the state, and has a simple configuration. For the purpose.

  According to a first aspect of the present invention, a light bulb holding mechanism is provided at one end of the support, and the light bulb holding mechanism is mounted so as to be swingable in the radial direction with respect to the support. A plurality of clamping pieces projecting from the tip of the support, a bulb clamping part provided radially inward at one end of the clamping piece, and the other end of the clamping piece facing outward in the radial direction A light bulb exchange device for exchanging a light bulb at a high place by holding the light bulb between the light bulb holding portions and rotating the support, the other end of the plurality of holding pieces Stopper means for locking the other end against the elastic force of the elastic member by abutting on the outer side in the radial direction, and an opening adjustment mechanism capable of adjusting the distance of the stopper means from the support. It is characterized by.

  According to a second aspect of the present invention, there is provided a compression spring in which the stopper means has a shaft body penetrating the other end portion of the sandwiching piece, and the elastic member is disposed between the sandwiching piece and the support body along the shaft body. It is characterized by becoming.

  A third aspect of the present invention is characterized in that the compression spring is mounted around the shaft body.

  A fourth aspect of the present invention is characterized in that the opening degree adjusting mechanism includes a female screw portion and a male screw portion which are screwed together.

  A fifth aspect of the present invention is characterized in that the light bulb clamping portion includes a cushion means on the surface, and the cushion means has a hollow portion in an intermediate portion in the width direction.

  According to a sixth aspect of the present invention, there is provided a light bulb lower portion supporting portion provided so as to protrude from the front end of the support body toward the light bulb clamping portion side, and a cylindrical shape disposed in the direction along the support body at the front end center of the light bulb lower portion support portion. It has the small light bulb holding part which consists of an elastic body, It is characterized by the above-mentioned.

  The seventh aspect of the present invention is characterized in that the light bulb lower portion support portion is attached to the tip of the support body so as to be extendable and contractible.

In the bulb replacement device according to claim 1 of the present invention, the stopper means for locking the other end portion against the elastic force of the elastic member by contacting the other end portion of the holding piece from the outside in the radial direction. Since the other end of each clamping piece is urged radially outward and abuts against the stopper means, each bulb clamping part is held at a minimum opening corresponding to the distance from the support of the stopper means. Can be maintained. Since the distance of the stopper means from the support can be adjusted by the opening adjustment mechanism, the minimum opening of the light bulb holding portion can be freely adjusted by adjusting the stopper means.
Therefore, if the minimum opening of the bulb holding part is adjusted to an appropriate opening according to the shape of the bulb, even if the bulb has a different external shape, an appropriate holding force based on the difference between the minimum opening and the external shape of the bulb Can hold the light bulb and can easily maintain the state of holding the light bulb. Therefore, it is easy to replace the bulb.
In addition, the other end portion of the clamping piece is urged outward in the radial direction, and the end portion only needs to be locked from the outside by the stopper means provided with the opening adjustment mechanism. .

  In the light bulb replacement device according to claim 2 of the present invention, the stopper means has a shaft body that penetrates the other end of the sandwiching piece, and the elastic member is disposed between the sandwiching piece and the support body along the shaft body. Since the other end portion of the sandwiching piece can be guided by the shaft body and can be swung, and the biasing force is urged by the compression spring along the shaft body. In addition, the minimum opening and the compression force can be adjusted for each clamping piece, which is easy to use.

In the light bulb replacement device according to claim 3 of the present invention, since the compression spring is mounted around the shaft body, the compression spring and the shaft body can be arranged in a compact manner.

  In the light bulb replacement device according to claim 4 of the present invention, the opening adjustment mechanism includes the female screw portion and the male screw portion that are screwed together, so that the distance of the stopper means from the support can be freely adjusted with a simple configuration. it can.

  In the light bulb replacement device according to claim 5 of the present invention, the light bulb holding portion has a cushion means on the surface, and this cushion means has a hollow portion in the intermediate portion in the width direction. A portion protruding outward can be arranged in the depression of each cushion means, and the cushion means can be deformed and clamped according to the outer shape of the bulb, and the bulb can be stably clamped easily.

  In the light bulb replacement device according to the sixth aspect of the present invention, since the light bulb lower portion supporting portion protruding from the front end of the support body to the light bulb holding portion side is provided, the light bulb is held by the light bulb holding portions of the plurality of holding pieces. When doing so, the lower part of the light bulb can be supported by the light bulb support part, and it is easy to stably hold the light bulb. At the same time, since it has a small bulb holding part made of a cylindrical elastic body arranged in the direction along the support at the center of the bulb lower support part, it holds even a small bulb smaller than the minimum opening of the bulb holding part can do. Therefore, it is possible to exchange more kinds of light bulbs with the same light bulb exchange device, and it is easy to use.

  In the bulb replacement device according to claim 7 of the present invention, since the bulb lower support portion is attached to the tip of the support body so as to be extendable and contractable, the lower portion of the bulb can be brought into contact by adjusting the position of the bulb lower support tool. In this case, it is easy to hold the optimum position of the light bulb at the light bulb holding portion of the holding piece.

FIG. 1 shows a side view of the bulb replacement device of this embodiment.
In this bulb exchange device 10, a bulb holding device 13 as a bulb holding mechanism is provided at one end of a support rod 11 as a support made of a long lightweight metal pipe, and a handle 15 is provided at the other end. Has the structure.

  As shown in FIGS. 1 and 2, the light bulb holding device 13 includes an arm fixing portion 17 fixed to one end portion of the support rod 11 with a rivet 16, and a support pin 11 attached to the arm fixing portion 17 by a fulcrum pin 19. And a compression spring 23 as an elastic member for urging the handle 15 side end 21b of the swing arm 21 radially outward. A stopper device 25 as a stopper means that protrudes from the vicinity of the arm fixing portion 17 so as to be able to come into contact with the outside of the swing arm 21; It has the expansion-contraction boss member 27 as a support part.

  The pair of swing arms 21 are disposed so as to face each other at a position of approximately 180 ° with the support rod 11 therebetween, and are supported by the fixed member 17 by a fulcrum pin 19 at an intermediate position. One end portion 21a protrudes in the axial direction from the tip of the support rod 11, and a clamping surface 29 as a bulb clamping portion facing each other is provided on the end portion 21a.

  The sandwiching surfaces 29 are provided so as to face each other inward in the radial direction of the pair of swing arms 21 and have a shape in the width direction curved toward the support rod 11 as shown in FIG. ing. A cushion sheet 31 as a cushion means made of a plate-like body such as foamed resin is joined to the sandwiching surface 29. The cushion sheet 31 has a substantially square annular shape when viewed from the center side, and has a light bulb arrangement hole 31a as a recessed portion at the center.

  As shown in FIG. 2, the thickness t in the radial direction is preferably as small as possible on the end 21a side where the holding surface 29 of each swing arm 21 is provided, for example, 15 mm or less, more preferably 10 mm or less. Is preferred. At the time of bulb replacement work, the end 21a side of each swing arm 21 is difficult to come into contact with other members such as a reflector around the bulb such as a lighting fixture, and is a bulb mounted in a narrower gap. This is because it can be easily replaced.

  The end 21a side of each swing arm 21 preferably has a small inclination angle with respect to the support rod 11, and, as will be described later, the range of the minimum opening of the swing arm 21 that is adjusted according to the bulb to be replaced. For example, the angle of the radially outermost edge 21e of the end portion 21a with respect to the axis of the support bar 11 is preferably within ± 30 °, more preferably within 20 °. Even when the inclination of the outermost edge 21e of the end portion 21a is large or small, the end portion 21a side of each swing arm 21 is likely to come into contact with other members around the light bulb such as a lighting fixture. is there.

  The other end 21 b side, which is the handle 15 side from the fulcrum pin 19 of the swing arm 21, is urged outward in the radial direction by the compression spring 23. The end portion 21b is locked against the elastic force of the compression spring 23 from the radially outer side by the stopper device 25.

  In such a swing arm 21, the clamping surface 29 is disposed on the radially innermost side with the end 21 b locked by the stopper device 25, and the opening between the clamping surfaces 29 of the pair of swing arms 21. Is the minimum opening. The opening degree can be increased by displacing the end 21a on the clamping surface 29 side of the swing arm 21 radially outward against the urging force of the compression spring 23.

  As shown in FIG. 2, the stopper device 25 includes a block-shaped stopper fixing portion 33 fixed to the support rod 11 by a screw 28 at a position near the handle 15 side of the arm fixing portion 17, and the stopper fixing portion 33. It has the rod 37 with a head connected. In the stopper fixing portion 33, two rod connecting portions 33c from a base portion 33b fixed to the support rod 11 are provided outward from the position where the rod connecting portions 33c are approximately 180 °.

  The head-attached rod 37 is coupled to the rod coupling portion 33 c and extends through the through hole 21 c formed in the end portion 21 b of the swing arm 21 to the outside of the end portion 21 b of the swing arm 21. A stopper rod 37a as a shaft body, and a stopper abutting portion 37b that is provided integrally with the stopper rod 37a and is disposed so as to be able to abut on the outer side of the end portion 21b of the swing arm 21 are provided.

  A compression spring 23 is mounted concentrically around the rod connecting portion 33c and the stopper rod 37a of the stopper fixing portion 33. One end portion 23 a of the compression spring 23 is in contact with the base portion 33 b of the stopper fixing portion 33, and the other end portion 23 b is in contact with the inner surface around the through hole 21 c on the end portion 21 b side of the swing arm 21.

  The through hole 21c has a vertically long slot. When the swing arm 21 swings about the fulcrum pin 19 as a fulcrum, the stopper rod 37a can move up and down relative to the through hole 21c. ing.

  The stopper device 25 is provided with a length adjusting portion 35 as an opening adjustment mechanism for adjusting the distance of the stopper contact portion 37b from the support rod 11. In this embodiment, the stopper rod 37a is provided with a male screw portion 37c, and the stopper fixing portion 33 is provided with a female screw portion 33a that can be screwed with the male screw portion 37c. By moving, it is possible to adjust the distance of the stopper contact portion 37b from the support rod 11.

  As shown in FIGS. 2 and 4, the telescopic boss member 27 is provided so as to protrude from the tip of the support bar 11 toward the clamping surface 29. The telescopic boss member 27 has an telescopic rod 39 that is slidably mounted on the top of the arm fixing portion 17 in the axial direction, and an abutting boss portion 41 that is mounted on the end of the telescopic rod 39. . The contact boss member 41 includes a fixed bottom plate 41b fixed to the expansion / contraction lot 39 and a boss cylinder 41c fixed around the fixed bottom plate 41b. The telescopic rod 39 is slidably inserted into an insertion hole 17 b provided in the axial direction of the support rod 11 in the arm fixing portion 17, and is fixed by a fixing screw 47 attached to the arm fixing portion 17.

In the hollow portion 41a of the abutting boss portion 41, a cylindrical rubber tube 43 as a small bulb holding portion made of a cylindrical elastic body is arranged in a direction along the support rod 11. The outer diameter of the cylindrical rubber tube 43 is smaller than the hollow portion 41a, and a gap is formed over the entire circumference between the cylindrical rubber tube 43 and the inner surface of the hollow portion 41a of the abutting boss portion 41. The distal end 43 a of the cylindrical rubber tube 43 protrudes in the axial direction from the distal end 41 d of the contact boss portion 41 and constitutes a part of the top portion 27 a of the telescopic boss member 27.
The cylindrical rubber tube 43 is provided with a slit 45 extending from the tip 43a to an intermediate position in the axial direction, and the tip 43a side is easily elastically deformed.

In order to replace the light bulb of the lighting equipment arranged at a high place using the light bulb exchange device 10 having such a configuration, the following operation is performed.
First, the position of each stopper abutting portion 37b from the support rod 11 is adjusted by rotating and expanding and contracting the stopper rod 37a of the stopper device 25 that holds each of the pair of swing arms 21. As a result, the position of the end portion 21b on the handle side of the swing arm 21 urged by the compression spring 23 is adjusted, and the appropriate opening according to the outer shape of the bulb R for exchanging the minimum opening degree of the clamping surface 29 is achieved. To the degree.
In the adjustment of the minimum opening, the pair of clamping surfaces 29 can be fitted to the bulb without destroying the bulb, and at the same time, the biasing force of the compression spring 23 is obtained so that the bulb can be clamped with sufficient force to rotate the bulb. Therefore, it is preferable that the opening is slightly smaller than the outer shape of the bulb.

  After the adjustment of the minimum opening, or before the adjustment, the position of the contact boss 41 is adjusted so that the top 27a of the telescopic boss member 27 is disposed at the position where the lower part of the bulb is disposed, and the telescopic rod 39 Is fixed with a fixing screw 47.

After adjusting the minimum opening of the clamping surface 29 of the swing arm 21 and the telescopic boss member 27 in this manner, the handle 15 of the bulb replacement device 10 is gripped from below the lighting equipment, and the bulb holding device 13 is used as the lighting equipment. Fit into the outer shape of the glass bulb r1 of the mounted light bulb R.
At this time, as shown in FIG. 2, the holding surface 29 of the swing arm 21 is pressed radially outward while sliding on the surface of the glass bulb r1 of the bulb R, and swings in the direction of arrow A. The other end 21 b of the swing arm 21 swings in the direction of arrow B and compresses the compression spring 23.

Then, when the lower part of the light bulb R is fitted to the top 27a of the telescopic boss member 27 including the tip 43a of the cylindrical rubber tube 43, as shown in FIG. A glass bulb r1 of the light bulb R is arranged. Thereby, the light bulb R is clamped between the clamping surfaces 29 with an appropriate force by the biasing force of the compression spring 23 based on the difference between the minimum opening degree of the clamping surface 29 and the outer shape of the glass bulb r1 of the bulb R.
At this time, the cushion sheet 31 is elastically deformed, and the surface of the glass bulb r1 of the bulb R is arranged in the bulb arrangement hole 31a of the cushion sheet 31, so that the cushion sheet 31 around the bulb arrangement hole 31a becomes the glass bulb r1. It will be in the state which touched.

  In this state, when the handle 15 is gripped and the support rod 11 is rotated, the bulb R held by the bulb holding device 13 is rotated, and the cap r2 of the bulb R is removed from the socket of the lighting fixture (not shown). be able to.

  Next, in order to attach a new light bulb having a substantially equivalent outer shape to the lighting fixture, without adjusting the stopper device 25, the minimum opening of the clamping surface 29 is left as it is, A new light bulb R is clamped between the clamping surfaces 29. If the handle 15 is held in this state, the base r2 of the light bulb R is brought into contact with the socket of the lighting fixture, and the support rod 11 is rotated in the direction opposite to that when the support rod 11 is removed, the new light bulb R is used as the lighting equipment. Can be installed. At this time, the clamping force of the bulb R by the clamping surface 29 is the same as when the bulb is removed.

  When the support rod 11 is pulled down after mounting the light bulb, the clamping surface 29 slides on the surface of the glass bulb r1 of the light bulb R and is detached from the light bulb R, thereby completing the light bulb replacement operation. it can.

  The replacement of the plurality of light bulbs can be performed by repeating the same operation without adjusting the stopper device 25 when the light bulbs have substantially the same outer shape.

  In the case of a light bulb having a different external shape, the position of the stopper device 25 and / or the lower light bulb support portion 29 is appropriately adjusted according to the external shape of the light bulb so that the light bulb R can be clamped or removed from the clamping surface 29. That's fine. For example, when replacing a light bulb having a smaller outer shape than the previously replaced light bulb, as shown in FIG. 6, the stopper device 25 is rotated to extend the distance between the support rod 11 and the stopper contact portion 37b. Thus, the minimum opening between the clamping surfaces 29 is contracted, and the telescopic boss member 27 is pulled out from the arm fixing portion 17 and fixed at a shallow position. In this state, by performing the same operation again, it is possible to perform a light bulb replacement operation smaller than the previous time.

  When replacing a small bulb G such as a glow starter having an outer shape smaller than the minimum opening of the clamping surface 29, as shown by a chain line in FIG. 2, the telescopic boss member 27 is pulled out from the arm fixing portion 17, and the telescopic boss member The top portion 27 a of 27 is protruded from the top portion 29 a of the clamping surface 29 of the swing arm 21 and fixed.

  In this state, as shown in FIG. 4, when the cylindrical rubber tube 43 provided on the telescopic boss member 27 is pressed against the small light bulb G, the cylindrical rubber tube 43 provided with the slit 45 is elastically deformed so that the hollow portion 43a is formed. The lower part of the small light bulb G is disposed in the hollow portion 43 a and is held by the elasticity of the cylindrical rubber tube 43. If the support rod 11 is rotated in this state, the small light bulb can be removed from the lighting fixture and replaced with a new small light bulb.

According to the light bulb exchange device 10 having the above-described configuration, the end portion 21b of the swing arm 21 is urged outward in the radial direction and the end portion 21b is engaged by coming into contact with the outer side in the radial direction. Since the stopper device 25 is provided, each clamping surface 29 can be maintained at the minimum opening corresponding to the distance from the support rod 11 of the stopper contact portion 37b of the stopper device 25. Since the distance of the stopper device 25 from the support rod 11 can be adjusted by the length adjusting unit 35, the minimum opening degree of the clamping surface 29 can be freely adjusted by adjusting the stopper device 25.
Therefore, if the minimum opening degree of the clamping surface 29 is adjusted to an appropriate opening degree corresponding to the outer shape of the glass bulb r1 of the light bulb R, the difference between the minimum opening degree and the outer shape of the light bulb, even if the light bulb R has a different outer shape. The light bulb R can be held with an appropriate holding force based on the above, and if it is left as it is, the state where the light bulb R is held can be easily maintained.
Therefore, the glass bulb r1 of the light bulb R is not damaged when the light bulb holding device 13 is fitted or pinched by an excessive clamping force. Further, when the light bulb R is rotated, it is not difficult to rotate the light bulb due to insufficient clamping force. Therefore, it is easy to perform a reliable light bulb replacement operation.
In addition, the other end portion 21b of the swing arm 21 is urged outward in the radial direction, and the end portion 21b is locked from the outside by the stopper device 25 having the length adjusting portion 35. Easy to simplify the configuration.

  In this bulb exchange device 10, the radial direction thickness of the end 21 a provided with the clamping surface 29 of the swing arm 21 is thin, and the inclination angle on the end 21 a side of the swing arm 21 is small. Even if the light bulb is mounted in a narrower space or in a deeper position, it is possible to insert the end portions 21a of the pair of swing arms 21 so as to hold the light bulb.

In the light bulb holder 10, the stopper device 25 has a stopper rod 37a that penetrates the end portions 21b of the plurality of swing arms 21, and the compression spring 23 extends along the stopper rod 37a with the swing arm 21, the support rod 11, and the like. Since the end 21b of the swing arm 21 can be guided and swung by the stopper rod 37a and is urged by the compression spring 23 along the stopper rod 37a, the swing arm 21 The swinging motion of 21 is smooth, and the minimum opening degree and the compression force can be adjusted for each swinging arm 21, which is convenient.
Further, since the compression spring 23 is mounted around the stopper rod 37a, the compression spring 23 and the stopper rod 37a can be arranged in a compact manner.

  According to the bulb replacing device 10, the length adjusting portion 35 provided in the stopper device 25 includes the female screw portion 33a and the male screw portion 37c that are screwed together, so that the distance of the stopper device 25 from the support rod 11 can be easily reduced. It can be freely adjusted with a simple configuration.

  In this light bulb exchange device 10, the clamping surface 29 includes a cushion sheet 31, and the cushion sheet 31 has a light bulb arrangement hole 31 a in an intermediate portion in the width direction. Therefore, when the light bulb R is sandwiched, the glass bulb r 1 of the light bulb R The portion of the outer shape that protrudes to the outermost side is placed in the light bulb arrangement hole 31a of each cushion sheet 31, and the cushion sheet 31 can be deformed and held according to the outer shape of the light bulb, and the light bulb R can be held stably. easy.

Since the light bulb exchange device 10 includes the telescopic boss member 27 provided so as to protrude from the tip of the support rod 11 toward the holding surface 29, when the light bulb is held by the holding surfaces 29 of the plurality of holding pieces, The lower part can be supported by the telescopic boss member 27, and it is easy to stably hold the bulb.
At the same time, since the cylindrical rubber tube 43 is provided at the center of the telescopic boss member 27, it is possible to hold even a small light bulb, and it is possible to exchange more types of light bulbs with the same light bulb exchange device 10. Easy to use. Moreover, since the cylindrical rubber tube 43 is provided on the telescopic boss member 27, the number of parts can be increased, and the number of parts can be reduced to achieve a simpler configuration.
Since the telescopic boss member 27 is attached to the tip of the support rod 11 so as to be telescopic, if the position of the lower bulb support 27 is adjusted and the lower portion of the bulb is brought into contact, the clamping surface 29 of the swing arm 21 It is easy to hold the optimum position of the bulb.

  In the above-described embodiment, the example in which the two swing arms 21 facing each other are provided, but three or more may be provided. In that case, it is preferable that the swing arms 21 are evenly arranged in the circumferential direction.

  In the above description, the example in which the stopper contact portion 37b and the stopper means shaft body 37c are integrated with the head-attached rod 37 has been described as the stopper device 25, but is not particularly limited. For example, the stopper contact portion 37b and the stopper means shaft body 37c may be separate, and the stopper means shaft body 37c is integrally fixed to the stopper fixing portion 33 so that the stopper contact shaft body 37b is in contact with the stopper means shaft body 37b. You may provide the opening degree adjustment mechanism in which the part 37b was screwed together.

It is a front view of the light bulb replacement device according to the present invention. It is sectional drawing of the light bulb holding mechanism of the light bulb replacement instrument of FIG. It is a perspective view of the light bulb clamping part of the light bulb exchange instrument of FIG. It is sectional drawing of the light bulb lower part support part of the light bulb exchange instrument of FIG. It is a figure which shows the state which clamped the light bulb with the light bulb exchange tool of FIG. FIG. 3 is a cross-sectional view of a light bulb holding mechanism in a state in which a light bulb clamping part and a light bulb lower support part of the light bulb exchange device of FIG. 1 are adjusted to positions different from those in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light bulb exchange instrument 11 Support body 13 Light bulb holding device 21 Swing arm 21a, 21b End portion 23 Compression spring 25 Stopper device 27 Telescopic boss member 29 Holding surface 31 Cushion sheet 31a Light bulb arrangement portion 33 Stopper fixing portion 35 Length adjustment portion 37 Headed rod 37a Stopper rod 37b Stopper contact part 43 Cylindrical rubber tube

Claims (7)

A light bulb holding mechanism is provided at one end of the support, the light bulb holding mechanism is mounted so as to be swingable in a radial direction with respect to the support, and a plurality of one end protrudes from the front end of the support. A sandwiching piece, a bulb sandwiching part provided radially inward at each of one end of the sandwiching piece, and an elastic member for biasing the other end of the clamping piece outward in the radial direction A light bulb exchange device for replacing a light bulb at a high place by rotating the support while holding the light bulb between the light bulb holding portions,
The stopper means that locks the other end against the elastic force of the elastic member by contacting the other end of the plurality of clamping pieces from the outside in the radial direction, and the distance of the stopper means from the support body can be adjusted. A light bulb exchange device comprising an opening adjusting mechanism.   The stopper means has a shaft body penetrating the other end of the sandwiching piece, and the elastic member comprises a compression spring disposed between the sandwiching piece and the support body along the shaft body. The light bulb replacement apparatus according to 1.   The bulb replacement device according to claim 2, wherein the compression spring is mounted around the shaft body.   4. The light bulb replacement device according to claim 1, wherein the opening adjustment mechanism includes a female screw portion and a male screw portion that are screwed together.   The bulb replacement device according to any one of claims 1 to 4, wherein the bulb clamping portion includes a cushion means on a surface thereof, and the cushion means has a hollow portion in an intermediate portion in the width direction.   A light bulb lower support portion provided to protrude from the front end of the support body toward the light bulb clamping portion side, and a small light bulb holding portion made of a cylindrical elastic body disposed in the direction along the support body at the front end of the light bulb lower support portion. 6. The light bulb replacement device according to claim 1, further comprising: The bulb replacement device according to claim 6, wherein the bulb lower support portion is attached to the tip of the support body so as to be extendable and contractible.

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